阅读说明：本技术 一种基于即食燕窝的冻干制备工艺 (Freeze-drying preparation process based on instant cubilose ) 是由 傅冰影 于 2021-06-07 设计创作，主要内容包括：本发明涉及一种基于即食燕窝的冻干制备工艺,包括,步骤S1,将预冻的燕窝制品通过冻干室进料口注入冻干室,中控单元根据预设温度开启制冷装置；步骤S2,推动装置将预冻的燕窝制品推至透气装置上,中控单元根据燕窝制品实时温度将透气装置移动至预设距离处进行再次预冻；步骤S3,中控单元根据燕窝制品厚度获取升华干燥的时间,中控单元根据获取的升华干燥时间,开启真空泵和升温装置对再次预冻后的燕窝制品进行升华干燥；步骤S4,中控单元根据在升华干燥时燕窝制品温度升高率获取解吸干燥的时间,中控单元根据获取的解吸干燥时间对燕窝制品进行解吸干燥。本发明通过设置中控单元调整各项步骤以使燕窝制品在冻干过程中的温度变化符合预设标准。(The invention relates to a freeze-drying preparation process based on instant cubilose, which comprises the following steps of S1, injecting a pre-frozen cubilose product into a freeze-drying chamber through a feed inlet of the freeze-drying chamber, and starting a refrigerating device by a central control unit according to a preset temperature; step S2, pushing the pre-frozen cubilose product to the ventilating device by the pushing device, and moving the ventilating device to a preset distance for re-pre-freezing by the central control unit according to the real-time temperature of the cubilose product; step S3, the central control unit obtains sublimation drying time according to the thickness of the cubilose product, and the central control unit starts a vacuum pump and a heating device to perform sublimation drying on the cubilose product which is pre-frozen again according to the obtained sublimation drying time; and step S4, the central control unit acquires desorption drying time according to the temperature rise rate of the cubilose product during sublimation drying, and the central control unit performs desorption drying on the cubilose product according to the acquired desorption drying time. The invention adjusts each step by setting the central control unit so as to lead the temperature change of the cubilose product in the freeze-drying process to meet the preset standard.)

1. A freeze-drying preparation process based on instant cubilose is characterized by comprising the following steps:

step S1, injecting the pre-frozen cubilose product into a freeze-drying chamber through a feed inlet of the freeze-drying chamber, and starting a refrigerating device by a central control unit according to a preset temperature;

step S2, pushing the pre-frozen cubilose product to the ventilating device by the pushing device, and moving the ventilating device to a first preset distance for re-pre-freezing by the central control unit according to the real-time temperature of the cubilose product;

step S3, the central control unit obtains sublimation drying time according to the thickness of the cubilose product, and the central control unit starts a vacuum pump and a heating device to perform sublimation drying on the cubilose product which is pre-frozen again according to the sublimation drying time obtained in real time;

step S4, the central control unit obtains desorption drying time according to the temperature rising rate of the cubilose product during sublimation drying in the step S3, and the central control unit carries out desorption drying on the cubilose product according to the obtained desorption drying time;

the central control unit obtains a preset distance of the ventilating device according to the comparison between the obtained real-time temperature of the cubilose product and a preset re-pre-freezing temperature, if the real-time temperature of the cubilose product is higher than the preset temperature, the central control unit controls the longitudinal transmission device to reduce the preset distance of the ventilating plate, and if the real-time temperature of the cubilose product is lower than the preset temperature, the central control unit controls the longitudinal transmission device to increase the preset distance of the ventilating plate, wherein the preset distance is the distance between the ventilating plate and the upper surface of the refrigerator;

the central control unit acquires the sublimation drying time T of the current cubilose product according to the thickness of the pre-frozen cubilose product, and sets the sublimation drying time T to h^CThe method comprises the following steps of obtaining a temperature change rate of the bird's nest product, wherein the temperature change rate is obtained according to the ratio of the difference between the initial temperature when the bird's nest product is injected into a freeze-drying chamber and the temperature when the bird's nest product reaches the pre-freezing temperature again to the time when the temperature of the bird's nest product reaches the pre-freezing temperature again;

the central control unit determines the desorption drying time of the cubilose product according to the temperature change rate of the cubilose product during sublimation drying, wherein the central control unit obtains that the temperature change rate of the cubilose product during sublimation drying is lower than a preset value, prolongs the desorption drying time, obtains that the temperature change rate of the cubilose product during sublimation drying is higher than the preset value, and shortens the desorption drying time;

the temperature raising device is arranged above the freeze-drying chamber and comprises a heating mechanism, the heating mechanism is arranged at the top of the freeze-drying chamber and used for providing hot air for the freeze-drying chamber, the heating mechanism is connected with a transverse power device, the transverse transmission device is used for rotating the heating mechanism, when the temperature change rate of the central control unit at a preset time interval is higher than a preset value, the central control unit reduces the motion frequency of the transverse transmission device and shortens the preset distance of the air permeable plate, and when the temperature change rate of the central control unit at a preset time period is lower than the preset value, the central control unit improves the motion frequency of the transverse transmission device and increases the preset distance of the air permeable plate;

the ventilating device comprises a ventilating plate, the ventilating plate is arranged in the freeze-drying chamber and used for containing the cubilose products, the ventilating plate is connected with a longitudinal transmission device, the longitudinal transmission device is used for transmitting the ventilating plate, when the central control unit judges that the preset distance is increased, the central control unit improves the power parameters of the longitudinal transmission device, the central control unit judges that the preset distance is shortened, and the central control unit reduces the power parameters of the longitudinal transmission device.

2. The freeze-drying preparation process based on instant edible bird's nest according to claim 1, characterized in that a temperature detection device is arranged on the ventilating device for obtaining the real-time temperature of the edible bird's nest product, the central control unit presets a re-freezing target temperature WD0, the central control unit obtains an initial temperature difference DeltaWD according to the difference value between the current real-time temperature WD of the edible bird's nest product and the preset re-freezing target temperature WD0, the central control unit obtains a preset distance of the ventilating device according to the comparison between the initial temperature difference DeltaWD and the preset initial temperature difference, wherein,

when the delta WD is larger than or equal to W2, the central control unit shortens the preset distance d0 to d01, and sets d01 to d0 x (1- (W2-delta WD)/W2);

when W1 <. DELTA.WD < W2, the central control unit is shortened by a preset distance d0 to d02, d02 ═ d0 × (1- (. DELTA.WD-W1)/W2)

When the delta WD is less than or equal to W1, the central control unit does not adjust the preset distance d 0; (ii) a

D0 is the preset distance of the central control unit, the preset initial temperature difference W of the central control unit, the setting, the first preset initial temperature difference W1, the second preset initial temperature difference W2.

3. The freeze-drying preparation process based on instant edible bird's nest according to claim 2, characterized in that a displacement detection device is arranged on the pushing device for obtaining the thickness h of the current edible bird's nest product, the central control unit obtains the sublimation and drying time coefficient of the current edible bird's nest product according to the comparison between the thickness of the current edible bird's nest product and a preset thickness, wherein,

when h is less than or equal to h0, the central control unit sets the current biochemical drying time coefficient of the cubilose product to be c1, c1 is 1.25, the central control unit obtains the sublimation drying time ST1 of the current cubilose product, and ST1 is set to be h^1.25；

When h is more than h0, the central control unit sets the current biochemical drying time coefficient of the cubilose product to be c2, c2 is | WD0-WD |/t1, the central control unit obtains the sublimation drying time ST2 of the current cubilose product, and sets ST2 to be h^|WD0-WD|/t1Wherein t1 is the time for adjusting the temperature of the current cubilose from the initial temperature of the re-pre-freezing temperature to the target temperature of the re-pre-freezing;

and h0 is a preset cubilose product thickness standard value of the central control unit.

4. The freeze-drying preparation process based on instant edible bird's nest according to claim 3, characterized in that the central control unit obtains the temperature change rate WSL when the current edible bird's nest is sublimation dried, sets the WSL as | WS0-WD0|/t2, wherein WD0 is the target temperature of prefreezing again, WS0 is the target temperature of sublimation drying, t2 is the time when the current edible bird's nest product is adjusted from the target temperature of prefreezing again to the target temperature of sublimation drying, wherein,

when the WSL is more than or equal to WJX2, the central control unit shortens the desorption drying time JT to JT1, and sets JT1 to JT x (1- (WSL-WJX2)/WJX 2);

when WJX1 < WSL < WJX2, the central control unit does not adjust desorption drying time;

when WSL < WJX1, the central control unit extends the desorption drying time JT to JT1, and sets JT2 as JT x (1- (WSL-WJX1)/WJX 2);

the central control unit is preset with a desorption drying temperature change rate standard value WJX, and is set with a first preset desorption drying temperature change rate standard value WJX1 and a second preset desorption drying temperature change rate standard value WJX 2.

5. The freeze-dried preparation process based on instant edible bird's nest according to claim 2, characterized in that the central control unit presets time interval gt, wherein the central control unit obtains first time interval temperature variation value Wgt1, second time interval temperature variation value Wgt2 and nth time interval temperature variation value Wgtn, the central control unit obtains the ratio of the (i-1) th time interval temperature variation value Wgt (i-1) to the ith time interval temperature variation value Wgti to set as ith time interval temperature variation rate WgtLi, and sets WgtLi as Wgti/Wgt (i-1), wherein,

when WgtLi > WE3, the central control unit reduces the transverse actuator movement frequency P to P1, setting P1 to px (1- (WgtLi-WE3)/WE 3); the central control unit shortens the preset distance di to di1 of the air-permeable plate, and sets di1 ═ di x (1- (WgtLi-WE3)/WE 3);

when WE2 WgtLi is less than or equal to WE3, the central control unit shortens the preset distance di to di2 of the breathable plate, and sets di2 to di x (1- ((WgtLi-WE2) + (WE3-WgtLi))/WE 2);

when WE1 < WgtLi < WE2, the central control unit judges that the temperature in the freeze-drying chamber does not change;

when WgtLi is less than or equal to WE1, the central control unit increases the transverse transmission movement frequency P to P2, and sets P2 to Px (1+ (WgtLi-WE1) × (WE2-WgtLi)/(WE1 XWE 2)); the central control unit increases the preset distance di to di3 of the air-permeable plate and sets di3 ═ di x (1+ (WgtLi-WE1)/WE 2);

the central control unit presets a time interval temperature change standard value WE, and sets a first preset time interval temperature change standard value WE1, a second time interval temperature change standard value WE2 and a third time interval temperature change standard value WE 3.

6. The freeze-drying preparation process based on instant cubilose according to claim 5, wherein the central control unit presets a distance standard value D, the central control unit adjusts the distance diq according to the obtained air-permeable plate, wherein,

when diq is larger than or equal to D, the central control unit increases the power parameters F0 to F1 of the longitudinal transmission device, and sets F1 to F0 x (1+ (diq-D)/D);

when diq < D, the central control unit reduces the power parameters F0 to F2 of the longitudinal transmission device, and sets F2 to F0 x (1- (D-diq)/D);

wherein, i is 1,2, q is 1,2, 3.

7. The freeze-drying preparation process based on instant cubilose according to claim 1, wherein the transverse transmission device comprises a first power device connected with the heating mechanism, used for providing power for the rotation of the heating mechanism, the transverse transmission device also comprises a heat conduction device which is connected with the heating mechanism, is used for transmitting hot air generated by the heating mechanism to the freeze-drying chamber, the heat conduction mechanism is connected with a second transmission mechanism, the second transmission mechanism is used for adjusting the heat conduction position of the heat conduction mechanism, when the central control unit controls the temperature rising device to rise the temperature of the freeze-drying chamber, the first power device controls the heating mechanism to rotate, the heating mechanism drives the heat conduction mechanism to rotate, the second transmission mechanism controls the heat conduction mechanism to reciprocate along the second transmission mechanism so that the heat conduction mechanism can uniformly conduct heat to the cubilose product; the central control unit obtains the power parameters of the first power device and the transmission frequency of the second transmission mechanism according to the real-time motion frequency of the transverse transmission device,

when Pi is less than or equal to Q1, the central control unit selects a first preset first power device power parameter G1 as the first power device power parameter, and a first preset transmission frequency K1 as the second transmission frequency;

when Q1 is more than Pi and less than Q2, the central control unit selects a second preset first power device power parameter G2 as the first power device power parameter, and a second preset transmission frequency K2 as the second transmission frequency;

when Pi is larger than or equal to Q2, the central control unit selects a third preset first power device power parameter G3 as the first power device power parameter, and a third preset transmission frequency K3 as the second transmission frequency;

the central control unit presets a first power device power parameter G, sets the first power device power parameter G1, a second power device power parameter G2, a third power device power parameter G3, presets a transmission frequency K, sets the first preset transmission frequency K1, the second preset transmission frequency K2 and the third preset transmission frequency K3.

8. The freeze-drying preparation process based on instant cubilose according to claim 5, wherein the central control unit presets a standard value WE0 for time interval temperature variation, and adjusts the selected power parameters of the first power device and the transmission frequency of the second transmission mechanism according to the comparison between the obtained ith time interval temperature variation WgtLi and the preset standard value for time interval temperature variation, wherein,

when WgtLi is larger than or equal to WE0, the central control unit reduces the power parameters Gi to Gi1 of the first power device and reduces the transmission frequency Ki to Ki1 of the second transmission mechanism;

when WgtLi is less than WE0, the central control unit increases the power parameters Gi to Gi2 of the first power device and increases the transmission frequency Ki to Ki2 of the second transmission mechanism.

9. The freeze-drying preparation process based on instant cubilose according to claim 8, wherein when the temperature change rate of the ith time interval obtained by the central control unit is greater than or equal to the preset time interval temperature change standard value, the central control unit reduces the power parameter Gi to Gi1, sets Gi1 to Gi x (1- (WgtLi-WE0)/WE0), and reducesReducing the second gear train transmission frequency Ki to Ki1, setting Ki1 ═ Ki x (1- ((WgtLi-WE0)/WE0)²)。

10. The freeze-drying preparation process based on instant edible bird's nest according to claim 8, characterized in that when the temperature change rate of the ith time interval acquired by the central control unit is less than the preset time interval temperature change standard value, the central control unit increases the power parameter Gi to Gi2 of the first power device, sets Gi2 ═ Gi x (1+ (WE0-WgtLi)/WE0), decreases the transmission frequency Ki of the second transmission mechanism to Ki1, sets Ki1 ═ Ki x (1+ ((WE0-WgtLi)/WE0)²)。

Technical Field

The invention relates to the field of edible bird's nest freeze-drying preparation, in particular to a freeze-drying preparation process based on instant edible bird's nest.

Background

With the development of the planting industry and the breeding industry in China, the number of varieties of animal and plant products is continuously increased, and as a plurality of animal and plant products are easy to deteriorate, the processing and storage industry of food is more and more emphasized by people. Therefore, a potential development opportunity is provided for freeze-dried food, and freeze drying as a new technology must be further and rapidly developed, so that the freeze-dried food becomes a technical field with great development potential.

The vacuum freeze drying is low temperature, no liquefaction drying, good appearance of freeze dried food, no cracking, no shrinkage, no hardening phenomenon, and can maintain the original shape and color of the food, effectively prevent the decomposition or oxidation of some components in the material, and inhibit the harmful effects of microorganisms and enzymes, thereby maintaining the freshness and nutritional components of the food. The vacuum freeze-dried food has thorough dehydration and light weight, and is particularly suitable for long-distance transportation and field operation, such as food supply in special environments of military affairs, aviation, aerospace, exploration and the like.

At present, the preset freeze-drying curve is mostly adopted in the cubilose freeze-drying preparation method, the freeze-drying curve cannot be adjusted according to the actual situation of cubilose products, and when more cubilose is subjected to freeze-drying treatment at one time, the cubilose is easy to be subjected to uneven and insufficient freeze-drying due to over severe temperature change, so that the problem of poor integral freeze-drying effect is caused.

Disclosure of Invention

Therefore, the invention provides a freeze-drying preparation process based on instant cubilose, which can solve the technical problem that the temperature change cannot be uniform in the freeze-drying preparation process of the cubilose.

In order to achieve the purpose, the invention provides a freeze-drying preparation process based on instant cubilose, which comprises the following steps:

step S1, injecting the pre-frozen cubilose product into a freeze-drying chamber through a feed inlet of the freeze-drying chamber, and starting a refrigerating device by a central control unit according to a preset temperature;

step S2, pushing the pre-frozen cubilose product to the ventilating device by the pushing device, and moving the ventilating device to a preset distance for re-pre-freezing by the central control unit according to the real-time temperature of the cubilose product;

step S3, the central control unit obtains sublimation drying time according to the thickness of the cubilose product, and starts a vacuum pump and a heating device to carry out sublimation drying on the cubilose product which is pre-frozen again according to the obtained sublimation drying time;

step S4, the central control unit acquires desorption drying time according to the temperature rise rate of the cubilose product during sublimation drying, and the central control unit performs desorption drying on the cubilose product according to the acquired desorption drying time;

the central control unit obtains a preset distance of the ventilating device according to the comparison between the obtained real-time temperature of the cubilose product and a preset re-pre-freezing temperature, if the real-time temperature of the cubilose product is higher than the preset temperature, the central control unit reduces the preset distance, and if the real-time temperature of the cubilose product is lower than the preset temperature, the central control unit increases the preset distance, wherein the preset distance is the distance between the ventilating plate and the upper surface of the refrigerating machine;

the central control unit acquires the sublimation drying time T of the current cubilose product according to the thickness of the pre-frozen cubilose product, and sets the sublimation drying time T to h^CThe method comprises the following steps of obtaining a temperature change rate of the bird's nest product, wherein the temperature change rate is obtained according to the ratio of the difference between the initial temperature when the bird's nest product is injected into a freeze-drying chamber and the temperature when the bird's nest product reaches the pre-freezing temperature again to the time when the temperature of the bird's nest product reaches the pre-freezing temperature again;

the central control unit determines the desorption drying time of the cubilose product according to the temperature change rate of the cubilose product during sublimation drying, wherein the central control unit obtains that the temperature change rate of the cubilose product during sublimation drying is lower than a preset value, prolongs the desorption drying time, obtains that the temperature change rate of the cubilose product during sublimation drying is higher than the preset value, and shortens the desorption drying time;

the temperature raising device is arranged above the freeze-drying chamber and comprises a heating mechanism, the heating mechanism is arranged at the top of the freeze-drying chamber and used for providing hot air for the freeze-drying chamber, the heating mechanism is connected with a transverse power device, the transverse transmission device is used for rotating the heating mechanism, when the temperature change rate of the central control unit at a preset time interval is higher than a preset value, the central control unit reduces the motion frequency of the transverse transmission device and shortens the preset distance of the air permeable plate, and when the temperature change rate of the central control unit at a preset time period is lower than the preset value, the central control unit improves the motion frequency of the transverse transmission device and increases the preset distance of the air permeable plate;

the ventilating device comprises a ventilating plate, the ventilating plate is arranged in the freeze-drying chamber and used for containing the cubilose products, the ventilating plate is connected with a longitudinal transmission device, the longitudinal transmission device is used for transmitting the ventilating plate, when the central control unit judges that the preset distance is increased, the central control unit improves the power parameters of the longitudinal transmission device, the central control unit judges that the preset distance is shortened, and the central control unit reduces the power parameters of the longitudinal transmission device.

Furthermore, the ventilating device is provided with a temperature detection device for acquiring the real-time temperature of the bird's nest product, the central control unit presets a re-freezing target temperature WD0, the central control unit acquires an initial temperature difference DeltaWD according to the difference value between the current real-time temperature WD of the bird's nest product and a preset re-freezing target temperature WD0, the central control unit compares the initial temperature difference DeltaWD with a preset initial temperature difference to acquire a preset distance of the ventilating device, wherein,

when the delta WD is larger than or equal to W2, the central control unit shortens the preset distance d0 to d01, and sets d01 to d0 x (1- (W2-delta WD)/W2);

when W1 <. DELTA.WD < W2, the central control unit is shortened by a preset distance d0 to d02, d02 ═ d0 × (1- (. DELTA.WD-W1)/W2)

When the delta WD is less than or equal to W1, the central control unit does not adjust the preset distance d 0; (ii) a

D0 is the preset distance of the central control unit, the preset initial temperature difference W of the central control unit, the setting, the first preset initial temperature difference W1, the second preset initial temperature difference W2.

Further, a displacement detection device is arranged on the pushing device and used for obtaining the thickness h of the current cubilose product, the central control unit obtains the sublimation and drying time coefficient of the current cubilose product according to the comparison between the thickness of the current cubilose product and the preset thickness, wherein,

when h is less than or equal to h0, the central control unit sets the current cubiloseThe biochemical drying time coefficient of the product is c1, c1 is 1.25, the central control unit obtains the sublimation drying time ST1 of the current cubilose product, and ST1 is h^1.25；

When h is more than h0, the central control unit sets the current biochemical drying time coefficient of the cubilose product to be c2, c2 is | WD0-WD |/t1, the central control unit obtains the sublimation drying time ST2 of the current cubilose product, and sets ST2 to be h^|WD0-WD|/t1Wherein t1 is the time for adjusting the temperature of the current cubilose from the initial temperature of the re-pre-freezing temperature to the target temperature of the re-pre-freezing;

and h0 is a preset cubilose product thickness standard value of the central control unit.

Further, the central control unit acquires the temperature change rate WSL when the current cubilose is subjected to sublimation drying, and sets the WSL as | WS0-WD0|/t2, wherein WD0 is the target temperature for prefreezing, WS0 is the target temperature for sublimation drying, t2 is the time when the current cubilose product is adjusted to the target temperature for sublimation drying from the target temperature for prefreezing,

when the WSL is more than or equal to WJX2, the central control unit shortens the desorption drying time JT to JT1, and sets JT1 to JT x (1- (WSL-WJX2)/WJX 2);

when WJX1 < WSL < WJX2, the central control unit does not adjust desorption drying time;

when WSL < WJX1, the central control unit extends the desorption drying time JT to JT1, and sets JT2 as JT x (1- (WSL-WJX1)/WJX 2);

the central control unit is preset with a desorption drying temperature change rate standard value WJX, and is set with a first preset desorption drying temperature change rate standard value WJX1 and a second preset desorption drying temperature change rate standard value WJX 2.

Further, the central control unit presets a time interval gt, wherein the central control unit obtains a first time interval temperature change value Wgt1, a second time interval temperature change value Wgt2 and an nth time interval temperature change value Wgtn, the central control unit obtains a ratio of an (i-1) th time interval temperature change value Wgt (i-1) to an ith time interval temperature change value Wgti as an ith time interval temperature change rate WgtLi, and the WgtLi is set as Wgti/Wgt (i-1), wherein,

when WgtLi > WE3, the central control unit reduces the transverse actuator movement frequency P to P1, setting P1 to px (1- (WgtLi-WE3)/WE 3); the central control unit shortens the preset distance di to di1 of the air-permeable plate, and sets di1 ═ di x (1- (WgtLi-WE3)/WE 3);

when WE2 WgtLi is less than or equal to WE3, the central control unit shortens the preset distance di to di2 of the breathable plate, and sets di2 to di x (1- ((WgtLi-WE2) + (WE3-WgtLi))/WE 2);

when WE1 < WgtLi < WE2, the central control unit judges that the temperature in the freeze-drying chamber does not change;

when WgtLi is less than or equal to WE1, the central control unit increases the transverse transmission movement frequency P to P2, and sets P2 to Px (1+ (WgtLi-WE1) × (WE2-WgtLi)/(WE1 XWE 2)); the central control unit increases the preset distance di to di3 of the air-permeable plate and sets di3 ═ di x (1+ (WgtLi-WE1)/WE 2);

the central control unit presets a time interval temperature change standard value WE, and sets a first preset time interval temperature change standard value WE1, a second time interval temperature change standard value WE2 and a third time interval temperature change standard value WE 3.

Further, the central control unit presets a distance standard value D, and adjusts the rear distance diq according to the acquired ventilation board, wherein,

when diq is larger than or equal to D, the central control unit increases the power parameters F0 to F1 of the longitudinal transmission device, and sets F1 to F0 x (1+ (diq-D)/D);

when diq < D, the central control unit reduces the power parameters F0 to F2 of the longitudinal transmission device, and sets F2 to F0 x (1- (D-diq)/D);

wherein, i is 1,2, q is 1,2, 3.

Further, the transverse transmission device comprises a first power device connected with the heating mechanism and used for providing power for rotation of the heating mechanism, and a heat conduction device connected with the heating mechanism and used for conducting hot air generated by the heating mechanism to the freeze-drying chamber, the heat conduction mechanism is connected with a second transmission mechanism, the second transmission mechanism is used for adjusting the heat conduction position of the heat conduction mechanism, when the central control unit controls the heating device to heat the freeze-drying chamber, the first power device controls the heating mechanism to rotate, the heating mechanism drives the heat conduction mechanism to rotate, and the second transmission mechanism controls the heat conduction mechanism to reciprocate along the second transmission mechanism so that the heat conduction mechanism can evenly conduct heat to the bird nest product; the central control unit obtains the power parameters of the first power device and the transmission frequency of the second transmission mechanism according to the real-time motion frequency of the transverse transmission device,

when Pi is less than or equal to Q1, the central control unit selects a first preset first power device power parameter G1 as the first power device power parameter, and a first preset transmission frequency K1 as the second transmission frequency;

when Q1 is more than Pi and less than Q2, the central control unit selects a second preset first power device power parameter G2 as the first power device power parameter, and a second preset transmission frequency K2 as the second transmission frequency;

when Pi is larger than or equal to Q2, the central control unit selects a third preset first power device power parameter G3 as the first power device power parameter, and a third preset transmission frequency K3 as the second transmission frequency;

the central control unit presets a first power device power parameter G, sets the first power device power parameter G1, a second power device power parameter G2, a third power device power parameter G3, presets a transmission frequency K, sets the first preset transmission frequency K1, the second preset transmission frequency K2 and the third preset transmission frequency K3.

Furthermore, the central control unit presets a time interval temperature change standard value WE0, and adjusts the selected power parameters of the first power device and the transmission frequency of the second transmission mechanism according to the comparison between the obtained ith time interval temperature change rate WgtLi and the preset time interval temperature change standard value, wherein,

when WgtLi is larger than or equal to WE0, the central control unit reduces the power parameters Gi to Gi1 of the first power device and reduces the transmission frequency Ki to Ki1 of the second transmission mechanism;

when WgtLi is less than WE0, the central control unit increases the power parameters Gi to Gi2 of the first power device and increases the transmission frequency Ki to Ki2 of the second transmission mechanism.

Further, when the temperature change rate of the ith time interval acquired by the central control unit is greater than or equal to a preset time interval temperature change standard value, the central control unit reduces the power parameters Gi to Gi1 of the first power device, sets Gi1 to Gi x (1- (WgtLi-WE0)/WE0), reduces the transmission frequency Ki of the second transmission mechanism to Ki1, sets Ki1 to Ki x (1- ((WgtLi-WE0)/WE0)²)。

Further, when the ith time interval temperature change rate acquired by the central control unit is smaller than the preset time interval temperature change standard value, the central control unit increases the power parameters Gi to Gi2 of the first power device, sets Gi2 to Gi x (1+ (WE0-WgtLi)/WE0), reduces the transmission frequency Ki of the second transmission mechanism to Ki1, sets Ki1 to Ki x (1+ ((WE0-WgtLi)/WE0)²)。

Compared with the prior art, the invention has the beneficial effects that the central control unit is arranged, the central control unit obtains the preset distance of the ventilating device according to the comparison between the obtained real-time temperature of the cubilose product and the preset re-freezing temperature, if the real-time temperature of the cubilose product is higher than the preset temperature, the central control unit reduces the preset distance, and if the real-time temperature of the cubilose product is lower than the preset temperature, the central control unit increases the preset distance; the central control unit acquires the sublimation drying time of the current cubilose product according to the thickness of the pre-frozen cubilose product, if the thickness of the pre-frozen cubilose product is smaller than or equal to a preset value, the sublimation drying time coefficient is a constant, and if the thickness of the pre-frozen cubilose product is larger than the preset value, the sublimation drying time coefficient is determined by the temperature change rate of the pre-freezing; the central control unit determines the desorption drying time of the cubilose product according to the temperature change rate of the cubilose product during sublimation drying, wherein the central control unit obtains that the temperature change rate of the cubilose product during sublimation drying is lower than a preset value, prolongs the desorption drying time, obtains that the temperature change rate of the cubilose product during sublimation drying is higher than the preset value, and shortens the desorption drying time; when the temperature change rate of the central control unit at the preset time interval is higher than the preset value, the central control unit reduces the motion frequency of the transverse transmission device and shortens the preset distance of the air permeable plate, and when the temperature change rate of the central control unit at the preset time interval is lower than the preset value, the central control unit improves the motion frequency of the transverse transmission device and increases the preset distance of the air permeable plate, wherein the preset distance of the air permeable plate is adjusted by adjusting the power parameter of the longitudinal transmission device, so that the temperature change of the cubilose product in the freeze-drying process meets the preset standard.

Particularly, the invention obtains the temperature of the current cubilose product in real time by arranging a temperature detection device on the ventilation device, the central control unit obtains the preset distance of the ventilation device by comparing the difference value between the real-time temperature of the current cubilose product and the preset re-pre-freezing temperature with the preset initial temperature difference, wherein if the real-time temperature difference value obtained by the central control unit is smaller than the first preset initial temperature difference, the central control unit judges that the difference between the current cubilose product and the preset re-pre-freezing temperature is not large, the central control unit does not adjust the preset distance of the ventilation plate, if the real-time temperature difference value obtained by the central control unit is between the first preset initial temperature difference and the second preset initial temperature difference, the real-time temperature of the current cubilose product has a certain difference compared with the preset re-pre-freezing temperature, and the central control unit enables the temperature of the cubilose product to reach the pre-freezing temperature quickly by shortening the distance between the ventilation plate and the upper surface of the refrigerator, if the real-time temperature difference value acquired by the central control unit exceeds the second preset initial temperature difference, the fact that the difference between the current real-time temperature of the cubilose product and the preset re-pre-freezing temperature is larger is shown, the central control unit judges that the distance between the air-permeable plate and the upper surface of the refrigerating machine is shortened in a larger range, the temperature of the cubilose product is accelerated to reach the re-pre-freezing temperature, and therefore the quality of cubilose freeze-drying of the cubilose product is improved.

Particularly, the invention obtains the thickness of the current cubilose product by arranging a displacement sensor on the pushing device, and obtains the sublimation drying time of the cubilose product according to the comparison between the thickness of the current cubilose product and the preset thickness, wherein if the thickness of the current cubilose product is lower than the preset value, the sublimation drying time is determined by the thickness of the current cubilose product, if the thickness of the current cubilose product is larger than the preset value, the sublimation drying time of the current cubilose product is not only determined by the thickness of the cubilose product, but also depends on the thickness of the current cubilose product and changes the pre-freezing temperature of the cubilose product in unit time, if the temperature changes in unit time quickly, the sublimation drying time of the cubilose product is short, and if the temperature changes in unit time slowly, the sublimation drying time of the cubilose product is long.

Particularly, the invention increases or shortens the desorption drying time by setting the current cubilose sublimation drying temperature change rate obtaining mode and comparing the current cubilose sublimation drying temperature change rate with a preset change rate standard value according to the comparison of the current cubilose sublimation drying temperature change rate with the preset change rate standard value, wherein the current cubilose sublimation drying temperature change rate is more than or equal to a second preset desorption drying temperature change rate standard value, which indicates that the current cubilose product is heated too fast during sublimation drying, the central control unit needs to shorten the desorption drying time to avoid excessive desorption drying of the cubilose product, if the current cubilose sublimation drying temperature change rate is in a preset value range, the central control unit determines that the current sublimation drying temperature change accords with the preset standard, the central control unit does not adjust the desorption drying time, if the current cubilose sublimation drying temperature change rate is less than the first preset desorption drying temperature change rate standard value, the current cubilose product is heated too slowly during sublimation drying, the central control unit needs to prolong the desorption drying time so that the desorption drying process of the cubilose product is more sufficient, and the freeze-drying manufacturing process of the cubilose product meets the preset standard.

In particular, the invention obtains the temperature change rate of the current time interval according to the ratio of the temperature change value of the current time interval to the temperature change value of the last time interval through the preset time interval, compares the temperature change rate of the current time interval with the preset value, if the temperature change rate of the current time interval is larger than the third preset value, the current temperature change is too fast, and the sublimation drying or desorption drying of the cubilose product is not sufficient, therefore, the central control unit reduces the temperature change rate by simultaneously reducing the movement frequency of the transverse transmission device and the preset distance of the air-permeable plate, if the temperature change rate of the current time interval is within the range of the second preset value and the third preset value, the central control unit only appropriately shortens the preset distance of the air-permeable plate to maintain the temperature change within the preset range, if the temperature change rate of the current time interval is within the range of the first preset value and the second preset value, the central control unit judges that the current temperature change meets a preset standard, if the temperature change rate of the current time interval is lower than a first preset value, the current temperature is increased too slowly, and the central control unit simultaneously increases the movement frequency of the transverse transmission device and increases the preset distance of the air permeable plate, so that the current temperature is adjusted to meet the preset standard, and the freeze-drying quality requirement of the cubilose product is met.

Particularly, the distance standard value between the air permeable plate and the upper surface of the refrigerator is preset, the central control unit compares the acquired distance between the adjusted air permeable plate and the upper surface of the refrigerator with the preset standard value, if the acquired distance is larger than or equal to the preset standard value, the central control unit adjusts the position of the air permeable plate to a corresponding distance by improving the power parameter of the longitudinal transmission device, and if the acquired distance is smaller than the preset standard value, the central control unit reduces the power parameter of the longitudinal transmission device, so that the air permeable plate reaches the adjusted position.

Particularly, the temperature of the cubilose product in the freeze-drying chamber can be uniformly and sufficiently raised by arranging the temperature raising device, the heating mechanism, the heat conducting mechanism, the first power device and the second transmission mechanism, the central control unit selects the optimal parameter from the preset power parameters of the first power device and the transmission frequency of the second transmission mechanism according to the real-time motion frequency of the transverse transmission device, and the central control unit compares the temperature change rate of the current time interval with a preset standard value to adjust the selected power parameters of the first power device and the transmission frequency of the second transmission mechanism; more specifically, if the change rate of the temperature of the current time interval is greater than or equal to a preset standard value, the central control unit reduces the lifting efficiency of the temperature of the current cubilose product by reducing the power parameter of the first power device and reducing the transmission frequency of the second transmission mechanism, so that the change rate of the temperature lifting of the current cubilose meets the preset standard, and if the change rate of the temperature of the current time interval is smaller than the preset standard value, the central control unit accelerates the temperature lifting of the current cubilose product by increasing the power parameter of the first power device and improving the transmission frequency of the second transmission mechanism, so that the change rate of the temperature lifting of the current cubilose meets the preset standard.

Drawings

FIG. 1 is a schematic diagram of a freeze-drying preparation process based on instant edible bird's nest according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a freeze-drying preparation device based on instant cubilose according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a temperature rising device of a freeze-drying preparation device based on instant cubilose according to an embodiment of the invention;

FIG. 4 is a schematic diagram of a longitudinal transmission device of a freeze-drying preparation device based on instant cubilose according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a second transmission mechanism of a freeze-drying preparation device based on instant cubilose according to an embodiment of the invention

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, a schematic diagram of a process for preparing instant edible bird's nest-based lyophilized food according to an embodiment of the present invention includes,

step S1, injecting the pre-frozen cubilose product into a freeze-drying chamber through a feed inlet of the freeze-drying chamber, and starting a refrigerating device by a central control unit according to a preset temperature;

step S2, pushing the pre-frozen cubilose product to the ventilating device by the pushing device, and moving the ventilating device to a preset distance for re-pre-freezing by the central control unit according to the real-time temperature of the cubilose product;

step S3, the central control unit obtains sublimation drying time according to the thickness of the cubilose product, and starts a vacuum pump and a heating device to carry out sublimation drying on the cubilose product which is pre-frozen again according to the obtained sublimation drying time;

step S4, the central control unit acquires desorption drying time according to the temperature rise rate of the cubilose product during sublimation drying, and the central control unit performs desorption drying on the cubilose product according to the acquired desorption drying time;

the central control unit obtains a preset distance of the ventilating device according to the comparison between the obtained real-time temperature of the cubilose product and a preset re-pre-freezing temperature, if the real-time temperature of the cubilose product is higher than the preset temperature, the central control unit reduces the preset distance, and if the real-time temperature of the cubilose product is lower than the preset temperature, the central control unit increases the preset distance, wherein the preset distance is the distance between the ventilating plate and the upper surface of the refrigerating machine;

the central control unit acquires the sublimation drying time T of the current cubilose product according to the thickness of the pre-frozen cubilose product, and sets the sublimation drying time T to h^CH is the thickness of the cubilose product, c is a sublimation drying time coefficient, if the thickness of the cubilose product after pre-freezing is smaller than or equal to a preset value, the sublimation drying time coefficient is a constant, and if the thickness of the cubilose product after pre-freezing is larger than the preset value, the sublimation drying time coefficient is determined by the temperature change rate of re-pre-freezing, wherein the temperature change rate is determined according to the difference between the initial temperature when the cubilose product is injected into the freeze-drying chamber and the temperature when the cubilose product reaches the re-pre-freezingObtaining the ratio of the value to the time for the temperature of the cubilose product to reach the pre-freezing temperature again;

the central control unit determines the desorption drying time of the cubilose product according to the temperature change rate of the cubilose product during sublimation drying, wherein the central control unit obtains that the temperature change rate of the cubilose product during sublimation drying is lower than a preset value, prolongs the desorption drying time, obtains that the temperature change rate of the cubilose product during sublimation drying is higher than the preset value, and shortens the desorption drying time;

the temperature raising device is arranged above the freeze-drying chamber and comprises a heating mechanism, the heating mechanism is arranged at the top of the freeze-drying chamber and used for providing hot air for the freeze-drying chamber, the heating mechanism is connected with a transverse power device, the transverse transmission device is used for rotating the heating mechanism, when the temperature change rate of the central control unit at a preset time interval is higher than a preset value, the central control unit reduces the motion frequency of the transverse transmission device and shortens the preset distance of the air permeable plate, and when the temperature change rate of the central control unit at a preset time period is lower than the preset value, the central control unit improves the motion frequency of the transverse transmission device and increases the preset distance of the air permeable plate;

the ventilating device comprises a ventilating plate, the ventilating plate is arranged in the freeze-drying chamber and used for containing the cubilose products, the ventilating plate is connected with a longitudinal transmission device, the longitudinal transmission device is used for transmitting the ventilating plate, when the central control unit judges that the preset distance is increased, the central control unit improves the power parameters of the longitudinal transmission device, the central control unit judges that the preset distance is shortened, and the central control unit reduces the power parameters of the longitudinal transmission device.

FIG. 2 is a schematic diagram of an apparatus for preparing a lyophilized powder based on instant edible bird's nest according to an embodiment of the present invention, including

A freeze-drying chamber 1 for preparing the bird's nest product freeze-drying;

the refrigerator 2 is arranged at the bottom of the freeze-drying chamber and is used for refrigerating the cubilose product;

the refrigerator is connected with a shunt pipe 3, and the top of the shunt pipe is vertically provided with a plurality of uniformly distributed branch pipes 4 along the length direction of the shunt pipe for conducting cold air prepared by the refrigerator upwards;

two sides of the inner wall of the freeze-drying chamber are provided with first transmission devices 5 for transmitting the ventilation device to move up and down along the transmission devices;

the two ends of the ventilating device 6 are respectively connected with a first transmission device arranged on the inner wall of the freeze-drying chamber and used for containing the cubilose products, and through holes which are uniformly distributed are formed in the ventilating device;

the top of the freeze-drying chamber is provided with a box body 7 for supporting a heating device and a vacuum device;

the middle of the top of the box body is provided with a heating device for increasing the temperature of the cubilose product;

the top of the box body is also provided with a vacuum device 13 which is used for pumping the freeze-drying chamber to a preset vacuum degree; (Cancel 12 and 13)

The freeze-drying chamber vacuum device is provided with a water vapor recovery device 12 for recovering water vapor in the freeze-drying chamber, and the water vapor recovery device is internally provided with a weight receptor for obtaining the recovery amount of the water vapor;

a pushing device is arranged in the box body and comprises a fourth power device 10, the fourth power device is arranged on one side of the outer part of the box body and is used for providing power for a push plate, and the push plate 9 is connected with the fourth power device through a threaded shaft 8;

the box body is also provided with a feed inlet for putting the cubilose product, and the feed inlet is hinged with a sealing cover 11 for forming a sealing environment for the freeze-drying chamber;

the cubilose product is thrown into the box body through the feeding hole, the fourth power device is started, the threaded shaft drives the push plate to move from the feeding hole to the position far away from the feeding hole, the ventilating device moves to the position close to the box body under the driving of the longitudinal transmission device, and the cubilose product uniformly moves to the ventilating device under the pulling of the push plate, so that the automatic throwing of the cubilose product is realized.

Please refer to fig. 3, which is a schematic structural diagram of a temperature rising device of a freeze-drying preparation device based on instant edible bird's nest according to an embodiment of the present invention, and the temperature rising device includes a heating mechanism 14, the heating mechanism extends to a box body and is fixedly connected to a horizontal connecting plate 15, a heat conducting mechanism is slidably mounted on the horizontal connecting plate, the heat conducting mechanism is used for conducting hot air generated by the heating mechanism to a freeze-drying chamber, the heat conducting mechanism includes a vertical tube 16, an extension tube 17 is disposed between the vertical tube and the bottom of the heating mechanism, and a fan 18 is disposed at the top of the heating mechanism.

Please refer to fig. 5, which is a schematic structural diagram of a second transmission mechanism of a freeze-drying preparation device based on instant cubilose according to an embodiment of the present invention, including a first power device 20 disposed on a box body, an output shaft of the first power device being in transmission connection with a heating mechanism through a belt pulley, the second transmission mechanism further including a second power device 22 disposed in the horizontal connecting plate for providing power to a reciprocating screw rod, a rectangular hole being disposed in the horizontal connecting plate, a vertical tube being in sliding connection with an inner wall of the rectangular hole, the reciprocating screw rod 21 being in threaded connection with the vertical tube 16;

during operation, first power device drives heating mechanism and rotates and make the horizontally connect board rotate, drives and is responsible for the circular motion, and second power device drives reciprocal lead screw and rotates and make the standpipe along rectangular hole back and forth movement simultaneously, realizes that the rising temperature device evenly heaies up to the freeze-drying room.

Please refer to fig. 4, which is a schematic structural diagram of a longitudinal transmission device of a freeze-drying preparation apparatus based on instant edible bird's nest according to an embodiment of the present invention, including a lifting groove, a threaded rod 25 rotatably installed in the lifting groove, a lifting block 24 slidably installed in the lifting groove, the lifting block 24 fixedly connected to a ventilation device, the first transmission device further including a third power device 23, an output shaft of the third power device 23 being in transmission connection with the threaded rod 25.

The during operation drives the threaded rod through third power device and rotates and make the elevator go up and down to drive ventilative device and go up and down, rise to the highest point when ventilative device, put in to ventilative device with the bird's nest goods through feed inlet and thrust unit's cooperation, third power device control ventilative device removes to predetermineeing the position, through prefreezing once more, sublimation drying and desorption drying carry out freeze-drying preparation to the bird's nest goods, when accomplishing freeze-drying preparation, ventilative device gets back to the highest point under third power device's drive, promote the bird's nest goods to the feed inlet by thrust unit and carry out the ejection of compact.

Particularly, the central control unit is arranged, the central control unit obtains the preset distance of the ventilation device according to the comparison between the obtained real-time temperature of the cubilose product and the preset re-freezing temperature, if the real-time temperature of the cubilose product is higher than the preset temperature, the central control unit reduces the preset distance, and if the real-time temperature of the cubilose product is lower than the preset temperature, the central control unit increases the preset distance; the central control unit acquires the sublimation drying time of the current cubilose product according to the thickness of the pre-frozen cubilose product, if the thickness of the pre-frozen cubilose product is smaller than or equal to a preset value, the sublimation drying time coefficient is a constant, and if the thickness of the pre-frozen cubilose product is larger than the preset value, the sublimation drying time coefficient is determined by the temperature change rate of the pre-freezing; the central control unit determines the desorption drying time of the cubilose product according to the temperature change rate of the cubilose product during sublimation drying, wherein the central control unit obtains that the temperature change rate of the cubilose product during sublimation drying is lower than a preset value, prolongs the desorption drying time, obtains that the temperature change rate of the cubilose product during sublimation drying is higher than the preset value, and shortens the desorption drying time; when the temperature change rate of the central control unit at the preset time interval is higher than the preset value, the central control unit reduces the motion frequency of the transverse transmission device and shortens the preset distance of the air permeable plate, and when the temperature change rate of the central control unit at the preset time interval is lower than the preset value, the central control unit improves the motion frequency of the transverse transmission device and increases the preset distance of the air permeable plate, wherein the preset distance of the air permeable plate is adjusted by adjusting the power parameter of the longitudinal transmission device, so that the temperature change of the cubilose product in the freeze-drying process meets the preset standard.

The ventilating device is provided with a temperature detection device for acquiring the real-time temperature of the cubilose product, the central control unit presets a re-freezing target temperature WD0, the central control unit acquires an initial temperature difference delta WD according to the difference value between the current real-time temperature WD of the cubilose product and a preset re-freezing target temperature WD0, the central control unit compares the initial temperature difference delta WD with a preset initial temperature difference to acquire a preset distance of the ventilating device, wherein,

when the delta WD is larger than or equal to W2, the central control unit shortens the preset distance d0 to d01, and sets d01 to d0 x (1- (W2-delta WD)/W2);

when W1 <. DELTA.WD < W2, the central control unit is shortened by a preset distance d0 to d02, d02 ═ d0 × (1- (. DELTA.WD-W1)/W2)

When the delta WD is less than or equal to W1, the central control unit does not adjust the preset distance d 0; (ii) a

D0 is the preset distance of the central control unit, the preset initial temperature difference W of the central control unit, the setting, the first preset initial temperature difference W1, the second preset initial temperature difference W2.

Particularly, the invention obtains the temperature of the current cubilose product in real time by arranging a temperature detection device on the ventilation device, the central control unit obtains the preset distance of the ventilation device by comparing the difference value between the real-time temperature of the current cubilose product and the preset re-pre-freezing temperature with the preset initial temperature difference, wherein if the real-time temperature difference value obtained by the central control unit is smaller than the first preset initial temperature difference, the central control unit judges that the difference between the current cubilose product and the preset re-pre-freezing temperature is not large, the central control unit does not adjust the preset distance of the ventilation plate, if the real-time temperature difference value obtained by the central control unit is between the first preset initial temperature difference and the second preset initial temperature difference, the real-time temperature of the current cubilose product has a certain difference compared with the preset re-pre-freezing temperature, and the central control unit enables the temperature of the cubilose product to reach the pre-freezing temperature quickly by shortening the distance between the ventilation plate and the upper surface of the refrigerator, if the real-time temperature difference value acquired by the central control unit exceeds the second preset initial temperature difference, the fact that the difference between the current real-time temperature of the cubilose product and the preset re-pre-freezing temperature is larger is shown, the central control unit judges that the distance between the air-permeable plate and the upper surface of the refrigerating machine is shortened in a larger range, the temperature of the cubilose product is accelerated to reach the re-pre-freezing temperature, and therefore the quality of cubilose freeze-drying of the cubilose product is improved.

The pushing device is provided with a displacement detection device for obtaining the thickness h of the current cubilose product, the central control unit obtains the sublimation drying time coefficient of the current cubilose product according to the comparison between the thickness of the current cubilose product and the preset thickness, wherein,

when h is less than or equal to h0, the central control unit sets the current biochemical drying time coefficient of the cubilose product to be c1, c1 is 1.25, the central control unit obtains the sublimation drying time ST1 of the current cubilose product, and ST1 is set to be h^1.25；

When h is more than h0, the central control unit sets the current biochemical drying time coefficient of the cubilose product to be c2, c2 is | WD0-WD |/t1, the central control unit obtains the sublimation drying time ST2 of the current cubilose product, and sets ST2 to be h^|WD0-WD|/t1Wherein t1 is the time for adjusting the temperature of the current cubilose from the initial temperature of the re-pre-freezing temperature to the target temperature of the re-pre-freezing;

and h0 is a preset cubilose product thickness standard value of the central control unit.

Particularly, the invention obtains the thickness of the current cubilose product by arranging a displacement sensor on the pushing device, and obtains the sublimation drying time of the cubilose product according to the comparison between the thickness of the current cubilose product and the preset thickness, wherein if the thickness of the current cubilose product is lower than the preset value, the sublimation drying time is determined by the thickness of the current cubilose product, if the thickness of the current cubilose product is larger than the preset value, the sublimation drying time of the current cubilose product is not only determined by the thickness of the cubilose product, but also depends on the thickness of the current cubilose product and changes the pre-freezing temperature of the cubilose product in unit time, if the temperature changes in unit time quickly, the sublimation drying time of the cubilose product is short, and if the temperature changes in unit time slowly, the sublimation drying time of the cubilose product is long.

The central control unit acquires the temperature change rate WSL during sublimation drying of the current cubilose, and sets the WSL as | WS0-WD0|/t2, wherein WD0 is the target temperature for prefreezing again, WS0 is the target temperature for sublimation drying, t2 is the time when the current cubilose product is adjusted to the target temperature for sublimation drying from the target temperature for prefreezing again, wherein,

when the WSL is more than or equal to WJX2, the central control unit shortens the desorption drying time JT to JT1, and sets JT1 to JT x (1- (WSL-WJX2)/WJX 2);

when WJX1 < WSL < WJX2, the central control unit does not adjust desorption drying time;

when WSL < WJX1, the central control unit extends the desorption drying time JT to JT1, and sets JT2 as JT x (1- (WSL-WJX1)/WJX 2);

the central control unit is preset with a desorption drying temperature change rate standard value WJX, and is set with a first preset desorption drying temperature change rate standard value WJX1 and a second preset desorption drying temperature change rate standard value WJX 2.

Specifically, in the embodiment of the invention, the secondary prefreezing target temperature WD0 of the European crown is-40 ℃, the preset standard value h0 of the thickness of the cubilose product is 10 mm, the sublimation drying target temperature is-10 ℃, and the desorption drying target temperature is 45 ℃.

Specifically, the invention increases or shortens the desorption drying time by setting the current cubilose sublimation drying temperature change rate obtaining mode and comparing the current cubilose sublimation drying temperature change rate with a preset change rate standard value according to the comparison of the current cubilose sublimation drying temperature change rate with the preset change rate standard value, wherein the current cubilose sublimation drying temperature change rate is more than or equal to a second preset desorption drying temperature change rate standard value, which indicates that the current cubilose product is heated too fast during sublimation drying, the central control unit needs to shorten the desorption drying time to avoid excessive desorption drying of the cubilose product, if the current cubilose sublimation drying temperature change rate is in a preset value range, the central control unit determines that the current sublimation drying temperature change meets the preset standard, the central control unit does not adjust the desorption drying time, if the current cubilose sublimation drying temperature change rate is less than the first preset desorption drying temperature change rate standard value, the current cubilose product is heated too slowly during sublimation drying, the central control unit needs to prolong the desorption drying time so that the desorption drying process of the cubilose product is more sufficient, and the freeze-drying manufacturing process of the cubilose product meets the preset standard.

Wherein the central control unit presets a time interval gt, wherein the central control unit obtains a first time interval temperature change value Wgt1, a second time interval temperature change value Wgt2 and an nth time interval temperature change value Wgtn, the central control unit obtains a ratio of an (i-1) th time interval temperature change value Wgt (i-1) to an ith time interval temperature change value Wgti as an ith time interval temperature change rate WgtLi, and the WgtLi is set as Wgti/Wgt (i-1), wherein,

when WgtLi > WE3, the central control unit reduces the transverse actuator movement frequency P to P1, setting P1 to px (1- (WgtLi-WE3)/WE 3); the central control unit shortens the preset distance di to di1 of the air-permeable plate, and sets di1 ═ di x (1- (WgtLi-WE3)/WE 3);

when WE2 WgtLi is less than or equal to WE3, the central control unit shortens the preset distance di to di2 of the breathable plate, and sets di2 to di x (1- ((WgtLi-WE2) + (WE3-WgtLi))/WE 2);

when WE1 < WgtLi < WE2, the central control unit judges that the temperature in the freeze-drying chamber does not change;

when WgtLi is less than or equal to WE1, the central control unit increases the transverse transmission movement frequency P to P2, and sets P2 to Px (1+ (WgtLi-WE1) × (WE2-WgtLi)/(WE1 XWE 2)); the central control unit increases the preset distance di to di3 of the air-permeable plate and sets di3 ═ di x (1+ (WgtLi-WE1)/WE 2);

the central control unit presets a time interval temperature change standard value WE, and sets a first preset time interval temperature change standard value WE1, a second time interval temperature change standard value WE2 and a third time interval temperature change standard value WE 3.

Specifically, the invention obtains the temperature change rate of the current time interval according to the ratio of the temperature change value of the current time interval to the temperature change value of the last time interval through the preset time interval, compares the temperature change rate of the current time interval with the preset value, if the temperature change rate of the current time interval is larger than the third preset value, the current temperature change is too fast, and the sublimation drying or desorption drying of the cubilose product is not sufficient, therefore, the central control unit reduces the temperature change rate by simultaneously reducing the movement frequency of the transverse transmission device and the preset distance of the air-permeable plate, if the temperature change rate of the current time interval is within the range of the second preset value and the third preset value, the central control unit only appropriately shortens the preset distance of the air-permeable plate to maintain the temperature change within the preset range, if the temperature change rate of the current time interval is within the range of the first preset value and the second preset value, the central control unit judges that the current temperature change meets a preset standard, if the temperature change rate of the current time interval is lower than a first preset value, the current temperature is increased too slowly, and the central control unit simultaneously increases the movement frequency of the transverse transmission device and increases the preset distance of the air permeable plate, so that the current temperature is adjusted to meet the preset standard, and the freeze-drying quality requirement of the cubilose product is met.

Wherein, the central control unit presets a distance standard value D, the central control unit adjusts the rear distance diq according to the obtained ventilation board, wherein,

when diq is larger than or equal to D, the central control unit increases the power parameters F0 to F1 of the longitudinal transmission device, and sets F1 to F0 x (1+ (diq-D)/D);

when diq < D, the central control unit reduces the power parameters F0 to F2 of the longitudinal transmission device, and sets F2 to F0 x (1- (D-diq)/D);

wherein, i is 1,2, q is 1,2, 3.

Specifically, the distance standard value between the air permeable plate and the upper surface of the refrigerator is preset, the central control unit compares the obtained distance between the adjusted air permeable plate and the upper surface of the refrigerator with the preset standard value, if the obtained distance is larger than or equal to the preset standard value, the central control unit adjusts the position of the air permeable plate to a corresponding distance by improving the power parameter of the longitudinal transmission device, and if the obtained distance is smaller than the preset standard value, the central control unit reduces the power parameter of the longitudinal transmission device, so that the air permeable plate reaches the adjusted position.

The transverse transmission device comprises a first power device, a heat conduction device and a second transmission mechanism, wherein the first power device is connected with the heating mechanism and used for providing power for the rotation of the heating mechanism, the heat conduction device is connected with the heating mechanism and used for conducting hot air generated by the heating mechanism to the freeze-drying chamber, the heat conduction mechanism is connected with the second transmission mechanism, the second transmission mechanism is used for adjusting the heat conduction position of the heat conduction mechanism, when the central control unit controls the heating device to heat the freeze-drying chamber, the first power device controls the heating mechanism to rotate, the heating mechanism drives the heat conduction mechanism to rotate, and the second transmission mechanism controls the heat conduction mechanism to reciprocate along the second transmission mechanism so that the heat conduction mechanism can evenly conduct heat air to the cubilose product; the central control unit obtains the power parameters of the first power device and the transmission frequency of the second transmission mechanism according to the real-time motion frequency of the transverse transmission device,

when Pi is less than or equal to Q1, the central control unit selects a first preset first power device power parameter G1 as the first power device power parameter, and a first preset transmission frequency K1 as the second transmission frequency;

when Q1 is more than Pi and less than Q2, the central control unit selects a second preset first power device power parameter G2 as the first power device power parameter, and a second preset transmission frequency K2 as the second transmission frequency;

when Pi is larger than or equal to Q2, the central control unit selects a third preset first power device power parameter G3 as the first power device power parameter, and a third preset transmission frequency K3 as the second transmission frequency;

the central control unit presets a first power device power parameter G, sets the first power device power parameter G1, a second power device power parameter G2, a third power device power parameter G3, presets a transmission frequency K, sets the first preset transmission frequency K1, the second preset transmission frequency K2 and the third preset transmission frequency K3.

The central control unit presets a time interval temperature change standard value WE0, compares the obtained ith time interval temperature change rate WgtLi with the preset time interval temperature change standard value, and adjusts the selected power parameters of the first power device and the transmission frequency of the second transmission mechanism, wherein,

when WgtLi is larger than or equal to WE0, the central control unit reduces the power parameters Gi to Gi1 of the first power device and reduces the transmission frequency Ki to Ki1 of the second transmission mechanism;

when WgtLi is less than WE0, the central control unit increases the power parameters Gi to Gi2 of the first power device and increases the transmission frequency Ki to Ki2 of the second transmission mechanism.

When the temperature change rate of the ith time interval acquired by the central control unit is greater than or equal to a preset time interval temperature change standard value, the central control unit reduces the power parameters Gi to Gi1 of the first power device, sets Gi1 to Gi x (1- (WgtLi-WE0)/WE0), reduces the transmission frequency Ki of the second transmission mechanism to Ki1, sets Ki1 to Ki x (1- ((WgtLi-WE0)/WE0)²)。

When the ith time interval temperature change rate acquired by the central control unit is smaller than a preset time interval temperature change standard value, the central control unit increases the power parameters Gi to Gi2 of the first power device, sets Gi2 ═ Gix (1+ (WE0-WgtLi)/WE0), reduces the transmission frequency Ki to Ki1 of the second transmission mechanism, sets Ki1 ═ Ki x (1+ ((WE0-WgtLi)/WE0)²)。

Specifically, the temperature of the cubilose product in the freeze-drying chamber can be uniformly and sufficiently raised by arranging the temperature raising device, the heating mechanism, the heat conduction mechanism, the first power device and the second transmission mechanism, the central control unit selects the optimal parameter from the preset first power device power parameter and the second transmission mechanism transmission frequency according to the real-time motion frequency of the transverse transmission device, and the central control unit compares the temperature change rate of the current time interval with the preset standard value to adjust the selected first power device power parameter and the second transmission mechanism transmission frequency; more specifically, if the change rate of the temperature of the current time interval is greater than or equal to a preset standard value, the central control unit reduces the lifting efficiency of the temperature of the current cubilose product by reducing the power parameter of the first power device and reducing the transmission frequency of the second transmission mechanism, so that the change rate of the temperature lifting of the current cubilose meets the preset standard, and if the change rate of the temperature of the current time interval is smaller than the preset standard value, the central control unit accelerates the temperature lifting of the current cubilose product by increasing the power parameter of the first power device and improving the transmission frequency of the second transmission mechanism, so that the change rate of the temperature lifting of the current cubilose meets the preset standard.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.