阅读说明：本技术 隧道式灭菌干燥机风压平衡控制方法及隧道式灭菌干燥机 (Tunnel type sterilization dryer air pressure balance control method and tunnel type sterilization dryer ) 是由 李吉龙 于 2021-11-18 设计创作，主要内容包括：本发明公开了一种隧道式灭菌干燥机风压平衡控制方法及隧道式灭菌干燥机,该方法根据容器药瓶队列的首瓶到达的位置,降低对应功能段的进风量,并根据容器药瓶队列的尾瓶到达的位置,增加对应功能段的进风量,从而保证在工作过程中各功能段内部的压力维持不变,实现外界发生波动时整机压力依然可以平衡,隧道式灭菌干燥机在预热段、加热段以及冷却段中每一段均设置可调的进风机组件、可调的排风机组件以及压力梯度监测单元,从而对于预热段、冷却段的压力情况可以分别单独控制。本发明能够对于预热风机、冷却风机的进风量分别进行调节,从而对于各功能段的压力梯度进行精确调节,实现外界发生波动时整机风压平衡的精确控制。(The invention discloses a tunnel type sterilization dryer and a wind pressure balance control method thereof, wherein the method reduces the air intake of a corresponding functional section according to the arrival position of a first bottle of a container bottle queue, and increases the air intake of the corresponding functional section according to the arrival position of a tail bottle of the container bottle queue, thereby ensuring that the pressure inside each functional section is kept unchanged in the working process, realizing that the pressure of the whole machine can still be balanced when the outside fluctuates, and the tunnel type sterilization dryer is provided with an adjustable air intake machine assembly, an adjustable exhaust machine assembly and a pressure gradient monitoring unit at each of a preheating section, a heating section and a cooling section, thereby respectively and independently controlling the pressure conditions of the preheating section and the cooling section. The invention can respectively adjust the air intake of the preheating fan and the cooling fan, thereby accurately adjusting the pressure gradient of each functional section and realizing the accurate control of the air pressure balance of the whole machine when the outside fluctuates.)

1. A tunnel type sterilization dryer wind pressure balance control method is characterized by comprising the following steps:

s1) adjusting the air intake of each functional section to ensure that the pressure gradient value of each functional section relative to the outside is within a preset threshold range, and taking the air intake of each functional section at the moment as an initial value;

s2) reducing the intake air amount of the corresponding functional section according to the position of the first bottle of the container and medicine bottle queue until the pressure gradient value of the functional section relative to the outside is within a preset threshold range;

s3) according to the positions of the tail bottles of the container medicine bottle queue, increasing the intake air volume of the corresponding functional sections until the pressure gradient value of the functional sections relative to the outside is within a preset threshold range, and after the container medicine bottles are emptied, restoring the intake air volume of each functional section to the initial value.

2. The method for controlling wind pressure balance of a tunnel sterilizing dryer according to claim 1, wherein the step S1) comprises the following steps:

acquiring a pressure gradient value of the preheating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset first threshold range, adjusting the air intake of the preheating section until the pressure gradient value is in the preset first threshold range;

acquiring a pressure gradient value of the heating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset second threshold range, adjusting the air intake of the heating section until the pressure gradient value is in the preset second threshold range;

and acquiring a pressure gradient value of the cooling section of the functional section relative to the outside, and if the pressure gradient value is out of a preset third threshold range, adjusting the air intake of the cooling section until the pressure gradient value is in the preset third threshold range.

3. The method for controlling wind pressure balance of a tunnel sterilizing dryer according to claim 1, wherein the step S2) comprises the following steps:

s21) before the first bottle of the container bottle queue reaches the heating section of the functional section, if the pressure gradient value of the preheating section relative to the outside is larger than a first upper limit value, reducing the air intake of the preheating section until the pressure gradient value is smaller than the first upper limit value;

s22) after the first bottle of the container bottle queue reaches the heating section of the functional section and before the first bottle reaches the cooling section of the functional section, keeping the air intake of the preheating section, the heating section and the cooling section unchanged;

s23) after the first bottle of the container and medicine bottle queue reaches the cooling section, if the pressure gradient value of the cooling section relative to the outside is larger than a second upper limit value, reducing the air intake of the cooling section until the pressure gradient value is smaller than the second upper limit value.

4. The method for controlling wind pressure balance of a tunnel sterilizing dryer according to claim 1, wherein the step S3) comprises the following steps:

s31) after the tail bottles of the container medicine bottle array reach the heating section of the functional section, if the pressure gradient value of the preheating section of the functional section relative to the outside is smaller than a first lower limit value, increasing the air intake of the preheating section until the pressure gradient value is larger than the first lower limit value;

s32) after the tail bottles of the container medicine bottle queue reach the cooling section of the functional section, if the pressure gradient value of the cooling section relative to the outside is smaller than a second lower limit value, increasing the air intake of the cooling section until the pressure gradient value is larger than the second lower limit value;

s33) emptying the tail bottles of the container and medicine bottle queue from the cooling section, and then restoring the air intake of the preheating section and the cooling section to the initial value.

5. The utility model provides a tunnel type sterilization desiccator, includes preheating section (1), heating section (2) and cooling zone (3) that connect gradually, still includes the control unit (46), every section all is equipped with adjustable air inlet machine subassembly, adjustable exhaust fan subassembly and pressure gradient monitoring unit in preheating section (1), heating section (2) and cooling zone (3), the output of pressure gradient monitoring unit is connected with the input of the control unit (46) respectively, the control end of exhaust fan subassembly is connected with the output of the control unit (46) respectively, its characterized in that:

the air inlet fan assembly comprises a first fan and a first frequency converter which are arranged in a corresponding preheating section (1), a heating section (2) or a cooling section (3), the output end of the control unit (46) is connected with the first fan through the first frequency converter, the exhaust fan assembly comprises a second fan and a second frequency converter which are arranged outside the corresponding preheating section (1), the heating section (2) or the cooling section (3), and the output end of the control unit (46) is connected with the second fan through the second frequency converter, so that the first frequency converter and the second frequency converter are controlled to adjust the rotating speed of the first fan and the rotating speed of the second fan, and the pressure gradient value of the preheating section (1), the heating section (2) or the cooling section (3) relative to the outside is changed.

6. The tunnel sterilization dryer according to claim 5, wherein the preheating section (1) comprises a first air inlet and a first exhaust duct (17), the first air inlet, the first fan and the exhaust duct (17) are arranged in sequence to form a first air duct, and the second fan is disposed on the first exhaust duct (17).

7. The tunnel type sterilization dryer according to claim 5, wherein the heating section (2) comprises an air supply opening (23), an air return frame (25) and a second air exhaust duct (27), the air supply opening (23), the first fan and the air return frame (25) are sequentially arranged to form a circulating air duct, the air return frame (25) and the second air exhaust duct (27) are communicated to form an air exhaust channel, and the second fan is arranged on the second air exhaust duct (27).

8. The tunnel sterilization dryer of claim 5, wherein the cooling section (3) comprises a second air inlet and a third air exhaust duct (34), the second air inlet, the first fan and the third air exhaust duct (34) are sequentially arranged to form a second air duct, and the second fan is disposed on the third air exhaust duct (34).

9. The tunnel sterilization dryer of claim 5, wherein the pressure gradient monitoring unit is a pressure transmitter, a first collection end of the pressure transmitter is arranged in the corresponding preheating section (1) or heating section (2) or cooling section (3), a second collection end of the pressure transmitter is arranged outside the corresponding preheating section (1) or heating section (2) or cooling section (3), and an output end of the pressure transmitter is connected with an input end of the control unit (46).

10. The utility model provides a tunnel type sterilization desiccator wind pressure balance control system which characterized in that includes:

the initial pressure adjusting unit is used for adjusting the air intake of each functional section, so that the pressure gradient value of each functional section relative to the outside is within a preset threshold range, and the air intake of each functional section at the moment is taken as an initial value;

the pressure reducing unit is used for reducing the intake of the corresponding functional section according to the position of the first bottle of the container medicine bottle queue until the pressure gradient value of the functional section relative to the outside is within a preset threshold range;

and the pressure lifting unit is used for increasing the air intake of the corresponding functional section until the pressure gradient value of the functional section relative to the outside is within a preset threshold range after acquiring the position where the tail bottle of the container medicine bottle queue reaches, and restoring the air intake of each functional section to an initial value after the container medicine bottle is emptied.

Technical Field

The invention relates to the field of food and medicine production, in particular to a tunnel type sterilization dryer and a wind pressure balance control method thereof.

Background

The structure of the existing tunnel type sterilization dryer is shown in figure 1, and comprises a preheating section, a heating section and a cooling section which are connected in sequence in a washing and drying room, wherein preheating exhaust air and cooling exhaust air are melted through a pipeline and then are exhausted by sharing one exhaust fan. In order to ensure that the three functional segments can function independently, a certain pressure gradient, typically 1-2pa, is usually maintained between the segments, and if the pressure is unbalanced, the following will occur: when the pressure of the preheating section is lower than that of the heating section by 1-2pa, hot air of the heating section is filled into the preheating section, so that the temperature of the preheating section is increased, the performance and the service life of the high-efficiency preheating filter can be influenced, when the pressure of the hot air of the heating section is reduced after the hot air flows to the preheating section, cold air of the cooling section is also filled into the heating section, and the sterilization and heat source removal effects of the heating section are influenced. On the contrary, if the pressure in the preheating section is higher than that in the heating section, the air in the preheating section flows into the heating section, and then the pressure in the heating section is increased to cause the hot air to flow into the cooling section, thereby affecting the cooling effect of the cooling section.

When the cooling section's of prior art adjustment exhaust fan air output, the pressure meeting of preheating section and cooling section risees simultaneously and reduces, and the exhaust fan is located the cooling section bottom (the exhaust fan inlet scoop is apart from preheating the air exit and cooling the distance of air exit not uniform), so it is difficult to control to the regulation of the pressure gradient of each functional section, in addition prior art's preheating fan, cooling blower is the fixed frequency operation, preheating fan promptly, the cooling blower air output is the definite value, can't adjust, it is relatively difficult to synthesize to lead to complete machine wind pressure balance to control when the external world takes place to fluctuate.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a tunnel type sterilization dryer and a wind pressure balance control method thereof, which can respectively adjust the air exhaust volume of a preheating fan and a cooling fan, thereby accurately adjusting the pressure gradient of each functional section and realizing the accurate control of the wind pressure balance of the whole machine when the outside fluctuates.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a wind pressure balance control method for a tunnel type sterilization dryer comprises the following steps:

s1) adjusting the air intake of each functional section to ensure that the pressure gradient value of each functional section relative to the outside is within a preset threshold range, and taking the air intake of each functional section at the moment as an initial value;

s2) reducing the intake air amount of the corresponding functional section according to the position of the first bottle of the container and medicine bottle queue until the pressure gradient value of the functional section relative to the outside is within a preset threshold range;

s3) according to the positions of the tail bottles of the container medicine bottle queue, increasing the intake air volume of the corresponding functional sections until the pressure gradient value of the functional sections relative to the outside is within a preset threshold range, and after the container medicine bottles are emptied, restoring the intake air volume of each functional section to the initial value.

Further, the specific step of step S1) includes:

acquiring a pressure gradient value of the preheating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset first threshold range, adjusting the air intake of the preheating section until the pressure gradient value is in the preset first threshold range;

acquiring a pressure gradient value of the heating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset second threshold range, adjusting the air intake of the heating section until the pressure gradient value is in the preset second threshold range;

and acquiring a pressure gradient value of the cooling section of the functional section relative to the outside, and if the pressure gradient value is out of a preset third threshold range, adjusting the air intake of the cooling section until the pressure gradient value is in the preset third threshold range.

Further, the specific step of step S2) includes:

s21) before the first bottle of the container bottle queue reaches the heating section of the functional section, if the pressure gradient value of the preheating section relative to the outside is larger than a first upper limit value, reducing the air intake of the preheating section until the pressure gradient value is smaller than the first upper limit value;

s22) after the first bottle of the container bottle queue reaches the heating section of the functional section and before the first bottle reaches the cooling section of the functional section, keeping the air intake of the preheating section, the heating section and the cooling section unchanged;

s23) after the first bottle of the container and medicine bottle queue reaches the cooling section, if the pressure gradient value of the cooling section relative to the outside is larger than a second upper limit value, reducing the air intake of the cooling section until the pressure gradient value is smaller than the second upper limit value.

Further, the specific step of step S3) includes:

s31) after the tail bottles of the container medicine bottle array reach the heating section of the functional section, if the pressure gradient value of the preheating section of the functional section relative to the outside is smaller than a first lower limit value, increasing the air intake of the preheating section until the pressure gradient value is larger than the first lower limit value;

s32) after the tail bottles of the container medicine bottle queue reach the cooling section of the functional section, if the pressure gradient value of the cooling section relative to the outside is smaller than a second lower limit value, increasing the air intake of the cooling section until the pressure gradient value is larger than the second lower limit value;

s33) emptying the tail bottles of the container and medicine bottle queue from the cooling section, and then restoring the air intake of the preheating section and the cooling section to the initial value.

The invention also provides a tunnel type sterilization dryer, which comprises a preheating section, a heating section and a cooling section which are sequentially connected, and further comprises a control unit, wherein each of the preheating section, the heating section and the cooling section is provided with an adjustable air inlet fan assembly, an adjustable exhaust fan assembly and a pressure gradient monitoring unit, the output end of the pressure gradient monitoring unit is respectively connected with the input end of the control unit, and the control end of the exhaust fan assembly is respectively connected with the output end of the control unit, and the tunnel type sterilization dryer is characterized in that:

the air inlet fan assembly comprises a first fan and a first frequency converter which are arranged in a corresponding preheating section or a heating section or a cooling section, the output end of the control unit is connected with the first fan through the first frequency converter, the exhaust fan assembly comprises a second fan and a second frequency converter which are arranged outside the corresponding preheating section or the heating section or the cooling section, and the output end of the control unit is connected with the second fan through the second frequency converter, so that the first frequency converter and the second frequency converter are controlled to adjust the rotating speed of the first fan and the rotating speed of the second fan, and the pressure gradient value of the preheating section or the heating section or the cooling section relative to the outside is changed.

Further, the preheating section includes first air intake and first exhaust duct, first air intake, first fan and exhaust duct arrange in proper order and form first wind channel, the second fan sets up on first exhaust duct.

Further, the heating section includes supply air inlet, return air frame and second exhaust duct, supply air inlet, first fan, return air frame arrange in proper order and form the circulation wind channel, return air frame and second exhaust duct intercommunication form the passageway of airing exhaust, the second fan sets up on second exhaust duct.

Further, the cooling section includes second air intake and third exhaust pipe, second air intake, first fan and third exhaust pipe arrange in proper order and form the second wind channel, the second fan sets up on third exhaust pipe.

Furthermore, the pressure gradient monitoring unit is a pressure transmitter, a first acquisition end of the pressure transmitter is arranged in the corresponding preheating section or heating section or cooling section, a second acquisition end of the pressure transmitter is arranged outside the corresponding preheating section or heating section or cooling section, and an output end of the pressure transmitter is connected with an input end of the control unit.

The invention also provides a wind pressure balance control system of the tunnel type sterilization dryer, which comprises the following components:

the initial pressure adjusting unit is used for adjusting the air intake of each functional section, so that the pressure gradient value of each functional section relative to the outside is within a preset threshold range, and the air intake of each functional section at the moment is taken as an initial value;

the pressure reducing unit is used for reducing the intake of the corresponding functional section according to the position of the first bottle of the container medicine bottle queue until the pressure gradient value of the functional section relative to the outside is within a preset threshold range;

and the pressure lifting unit is used for increasing the air intake of the corresponding functional section until the pressure gradient value of the functional section relative to the outside is within a preset threshold range after acquiring the position where the tail bottle of the container medicine bottle queue reaches, and restoring the air intake of each functional section to an initial value after the container medicine bottle is emptied.

Compared with the prior art, the invention has the advantages that:

1. according to the arrival positions of the head bottle and the tail bottle of the container medicine bottle queue in the tunnel type sterilizing dryer, the air intake or exhaust volume of the preheating section and the cooling section is respectively adjusted in real time in combination with actual conditions, so that the pressure inside each functional section is kept unchanged, and the pressure of the whole machine can still be balanced when the outside fluctuates.

2. In the tunnel type sterilization dryer, the preheating section and the cooling section are respectively provided with the independent exhaust pipeline, the air inlet fan assembly and the exhaust fan assembly, so that the pressure conditions of the preheating section and the cooling section can be respectively and independently controlled, and the condition that the pressure of the two functional sections is simultaneously increased or reduced is avoided.

Drawings

Fig. 1 is a schematic structural view of a conventional tunnel sterilizing dryer.

Fig. 2 is a flowchart of a method according to a first embodiment of the invention.

Fig. 3 is a schematic structural view of a tunnel sterilizing dryer according to a second embodiment of the present invention.

Fig. 4 is an electrical schematic diagram of a tunnel sterilizing dryer according to a second embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a second preheating section according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a second heating section according to an embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a second cooling stage according to an embodiment of the present invention.

Illustration of the drawings: 1-preheating section, 2-heating section, 3-cooling section, 4-container medicine bottle, 5-bottle conveying mesh belt, 11-preheating coarse-effect filter, 12-preheating laminar flow fan, 13-preheating fan cover, 14-preheating high-efficiency filter, 15-preheating box body, 16-preheating exhaust fan, 17-first exhaust pipeline, 21-high-temperature laminar flow fan, 22-heating component, 23-air supplement port, 24-high-temperature box body, 25-air return frame, 26-high-temperature exhaust fan, 27-second exhaust pipeline, 28-high-temperature high-efficiency filter, 29-heating fan cover, 31-cooling laminar flow fan, 32-cooling section air inlet, 33-cooling section coarse-effect filter, 34-third exhaust pipeline, 35-cooling box body, 36-cooling high-efficiency filter, 37-cooling fan cover, 38-cooling exhaust fan, 40-preheating fan frequency converter, 41-cooling fan frequency converter, 42-preheating exhaust frequency converter, 43-preheating pressure transmitter, 44-cooling exhaust frequency converter, 45-high temperature exhaust frequency converter, 46-control unit, 47-high temperature pressure transmitter and 48-cooling pressure transmitter.

Detailed Description

The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.

Example one

For the existing tunnel type sterilization dryer, the pressure difference condition of each working stage is analyzed as follows:

and (3) no-load phase analysis:

in no-load, because no bottle is arranged above the mesh belt, the heating inlet air brake SV1, the heating outlet air brake SV2 and the oven outlet air brake SV3 are closed, the pressure difference of each functional section is low, the pressure difference change is mostly only influenced by a preheating laminar flow fan, a high-temperature laminar flow fan and a cooling laminar flow fan, and the fluctuation is small.

Analysis of bottle feeding stage:

the bottle feeding stage is a process from no-load (no bottle on the net belt) to full load (the net belt is provided with the bottle), the heating inlet air brake SV1, the heating outlet air brake SV2 and the oven outlet air brake SV3 are closed to opened, bottle feeding is started, and as the heating inlet air brake SV1 is closed, the bottle feeding blocks laminar air blown down by a preheating laminar flow fan, so that the pressure difference between a preheating section and the heating section is gradually increased, and the pressure difference fluctuates; in the same way, when entering the heating section and the cooling section, the pressure difference between the heating section and the cooling section is increased and becomes fluctuation; when the bottle enters the air lock SV3 at the outlet of the oven and the air lock SV3 at the outlet of the oven is opened, the laminar flow air of the laminar flow fan blocked by the bottle and the air filled between the bottles cause the pressure difference of the cooling section to be larger than that of the heating section, thus the bottle does not meet the control requirement.

Full load phase analysis:

in the full-load stage, the heating inlet air brake SV1, the heating outlet air brake SV2 and the oven outlet air brake SV3 are opened, the frequency of the laminar flow fan is unchanged, most of the pressure difference is only influenced by the pressure difference between filling, and the pressure difference is stable.

Analysis of the tail bottle emptying stage:

the tail bottle emptying stage is a process from full load (with bottles on the net belt) to no load (without bottles on the net belt), a heating inlet air brake SV1, a heating outlet air brake SV2 and an oven outlet air brake SV3 from opening to closing.

When emptying starts, before a heating inlet air brake SV1 is opened, the preheating section starts to have no bottle, no bottle blocks laminar air blown by a laminar flow fan, so that the pressure difference between the preheating section and the heating section is gradually reduced, and the heating section and the cooling section are still in a full-load state (full of bottles), because the pressure of the heating section is higher than that of the preheating section and the cooling section, the air of the heating section flows to the preheating section, so that the pressure difference fluctuates; when the preheating section is completely without bottles, the heating inlet air brake SV1 is closed, and most factors influencing the pressure difference of the preheating section become the rotating speed (air discharge quantity) of the preheating laminar flow fan. Similarly, when no bottle is arranged on the heating section and the cooling section, the pressure difference of the heating section and the cooling section is also reduced and becomes fluctuation; when the bottle leaves the air damper SV3 at the outlet of the oven, the air damper SV3 at the outlet of the oven is opened, the cooling section has no bottle to block laminar air of a laminar flow fan, only the air filled in the filling space is left to lead the differential pressure of the cooling section to fluctuate, and the differential pressure of the cooling section is reduced; when all bottles leave the oven outlet air brake SV3, the oven outlet air brake SV3 is closed, and most of the influence factors of the pressure difference of the preheating section, the heating section and the cooling section are pressure difference fluctuation caused by the rotating speed (air discharge quantity) of the hot laminar flow fan, the high-temperature laminar flow fan and the cooling laminar flow fan.

Based on the analysis, the differential pressure of the preheating section, the heating section and the cooling section is in no-load state, the full-load stage is not changed generally, and the differential pressure of equipment is stable as long as the differential pressure between the filling chamber and the bottle washing chamber is kept stable; during the production bottle feeding stage and the tail bottle emptying stage, the bottle feeding stage can generate fluctuation of pressure difference due to the state transition (from no-load to full-load) of the bottle conveying process and the tail bottle emptying stage (from full-load to no-load). Therefore, pressure difference fluctuation of the bottle feeding stage and the tail bottle emptying stage is well treated, and good air pressure balance can be maintained.

For the analysis of the internal pressure conditions of the preheating section, the heating section and the cooling section in the working process, the embodiment provides a method for controlling the wind pressure balance of a tunnel type sterilization dryer, as shown in fig. 2, which includes the following steps:

s1) adjusting the air intake of each functional section to make the pressure gradient value of each functional section relative to the outside within the preset threshold range, taking the air intake and the air exhaust of each functional section as initial values, specifically, adjusting the air intake of the preheating section, the heating section and the cooling section respectively to make the pressure gradient value of the preheating section, the heating section and the cooling section relative to the washing room within the preset threshold range, and taking the air intake and the air exhaust of the preheating section and the cooling section as initial values;

s2) according to the position of the first bottle of the container and medicine bottle queue, reducing the air intake of the corresponding function section or increasing the air exhaust of the corresponding function section until the pressure gradient value of the function section relative to the outside is within a preset threshold range, specifically, after the first bottle of the container and medicine bottle queue reaches the preheating section, reducing the air intake of the preheating section or increasing the air exhaust until the pressure gradient value of the preheating section relative to the washing and drying room is within the preset threshold range, and after the first bottle of the container and medicine bottle queue reaches the cooling section, reducing the air intake of the cooling section or increasing the air exhaust until the pressure gradient value of the cooling section relative to the washing and drying room is within the preset threshold range;

s3) according to the position of the tail bottle of the container medicine bottle queue, increasing the air intake of the corresponding function section or reducing the air exhaust of the corresponding function section until the pressure gradient value of the function section relative to the outside is within a preset threshold range, recovering the air intake and the air exhaust of each function section to initial values after the container medicine bottles are emptied, specifically, increasing the air intake or reducing the air exhaust of the preheating section until the pressure gradient value of the preheating section relative to the washing and drying room is within the preset threshold range after the tail bottles of the container medicine bottle queue reach the cooling section, increasing the air intake or reducing the air exhaust of the cooling section until the pressure gradient value of the cooling section relative to the washing and drying room is within the preset threshold range, and recovering the air intake and the air exhaust of the preheating section and the cooling section after the container medicine bottles are emptied from the cooling section.

Wherein, the step S1) includes the following steps:

acquiring a pressure gradient value of a preheating section relative to a washing and drying room, and if the pressure gradient value is out of a preset first threshold value range, adjusting the air inlet amount of the preheating section until the pressure gradient value is within the preset first threshold value range, wherein the first threshold value range is 2-10pa in the embodiment;

acquiring a pressure gradient value of the heating section relative to the washing and drying room, and if the pressure gradient value is out of a preset second threshold value range, adjusting the air intake rate of the heating section until the pressure gradient value is within the preset second threshold value range, wherein the second threshold value range is 3-12pa in the embodiment;

and acquiring a pressure gradient value of the cooling section relative to the washing and drying room, and if the pressure gradient value is out of a preset third threshold range, adjusting the air intake of the cooling section until the pressure gradient value is in the preset third threshold range, wherein the third threshold range is 2-10pa in the embodiment.

After debugging is finished, the values of the air intake volume and the air exhaust volume of the preheating section, the heating section and the cooling section are used as initial values, wherein the air intake volume of the heating section is not changed any more, and the air pressure balance control of the tunnel type sterilization dryer is finished by adjusting the air intake volume and the air exhaust volume of the preheating section and the cooling section subsequently.

A bottle feeding stage:

when the bottle is conveyed to the preheating section and before the bottle reaches a heating inlet air brake SV1, the pressure gradient between the preheating section and the washing and drying chamber is increased, only the air inlet amount of the preheating section is reduced or the air exhaust amount of the preheating section is increased, and the air inlet amount and the air exhaust amount of the heating section and the cooling section are kept unchanged;

as the bottle is transported to the heating section and before reaching the heated outlet air lock SV2 air lock, the pressure gradient between the heating section and the wash oven increases because the pressure differential is maintained: the preheating section < the heating section > is greater than the cooling section, so that the air inlet volume and the air outlet volume of the preheating section, the heating section and the cooling section are kept unchanged without adjustment;

when the bottles are conveyed to the cooling section and before the bottles reach an air brake SV3 at the outlet of the oven, the pressure gradient between the cooling section and the washing and drying chamber is increased, only the air inlet amount of the cooling section is reduced or the air exhaust amount of the cooling section is increased, and the air inlet amount and the air exhaust amount of the preheating section and the heating section are kept unchanged;

when the bottles are conveyed to the outlet of the oven and reach the SV3 air gate of the outlet of the oven, the pressure gradient between the cooling section and the washing section is increased under the influence of the pressure difference between the filling sections and the full-load state of the bottles, only the air intake of the cooling section is reduced or the air exhaust of the cooling section is increased, and the air intake and the air exhaust of the preheating section and the heating section are kept unchanged.

Therefore, the specific step of step S2) in this embodiment includes:

s21) before the first bottle of the container and medicine bottle queue reaches the heating section, if the pressure gradient value of the preheating section relative to the washing and drying room is larger than a first upper limit value, reducing the air intake of the preheating section or increasing the air exhaust of the preheating section until the pressure gradient value is smaller than the first upper limit value, wherein the first upper limit value in the embodiment is the upper limit value of a first threshold area, namely 10 pa;

s22) after the first bottle of the container bottle queue reaches the heating section and before the first bottle reaches the cooling section, keeping the air intake and the air exhaust of the preheating section, the heating section and the cooling section unchanged;

s23) after the first bottle of the queue of container bottles reaches the cooling section, if the pressure gradient of the cooling section relative to the washing and drying room is greater than the second upper limit, decreasing the air intake of the cooling section or increasing the air exhaust of the cooling section until the pressure gradient is less than the second upper limit, where the second upper limit in this embodiment is the upper limit of the third threshold region of 10 pa.

And (3) tail bottle emptying stage:

when the bottle leaves the preheating section, the heating inlet air brake SV1 is closed, the pressure gradient between the preheating section and the washing and drying chamber is reduced, only the air inlet amount of the preheating section is increased or the air exhaust amount of the preheating section is reduced, and the air inlet amount and the air exhaust amount of the heating section and the cooling section are kept unchanged;

when the bottles are taken away from the heating section, the heating outlet air brake SV2 is closed, and the pressure gradient between the heating section and the washing and drying is reduced, because the pressure difference can be kept as follows: the preheating section < the heating section > is greater than the cooling section, so that the air inlet volume and the air outlet volume of the preheating section, the heating section and the cooling section are kept unchanged without adjustment;

when the bottles are conveyed to the cooling section and an air brake SV3 at the outlet of the oven is opened, the pressure gradient between the cooling section and the washing and drying chamber is reduced, only the air inlet amount of the cooling section is increased or the air exhaust amount of the cooling section is reduced, and the air inlet amount and the air exhaust amount of the preheating section and the heating section are kept unchanged;

when the bottle is conveyed to the outlet of the oven and the air lock SV3 at the outlet of the oven is closed, the pressure gradient between the cooling section and the washing and drying chamber is reduced, only the air intake quantity of the cooling section is increased or the air exhaust quantity of the cooling section is reduced, the air intake quantity and the air exhaust quantity of the preheating section and the heating section are kept unchanged, and after the air lock SV3 at the outlet of the oven is closed, the whole tunnel type sterilization dryer is restored to an idle state, so that when the pressure gradient value between the cooling section and the washing and drying chamber returns to the third threshold range, the air intake quantity and the air exhaust quantity of the preheating section and the cooling section are restored to the initial values.

Therefore, the specific step of step S3) in the present embodiment includes:

s31) after the tail bottles of the container medicine bottle queue reach the heating section, if the pressure gradient value of the preheating section relative to the washing and drying room is smaller than a first lower limit value, increasing the air intake of the preheating section or reducing the air exhaust of the preheating section until the pressure gradient value is larger than the first lower limit value, wherein the first lower limit value in the embodiment is the lower limit value 2pa of the first threshold value area;

s32) after the tail bottles of the container medicine bottle queue reach the cooling section, if the pressure gradient value of the cooling section relative to the washing and drying room is smaller than a second lower limit value, increasing the air intake quantity of the cooling section or reducing the air exhaust quantity of the cooling section until the pressure gradient value is larger than the second lower limit value, wherein the second lower limit value in the embodiment is the lower limit value 2pa of a third threshold value area;

s33) emptying the tail bottles of the container and medicine bottle queue from the cooling section, and then restoring the air intake and the air exhaust of the preheating section and the cooling section to the initial values.

According to the steps, the arrival positions of the head bottle and the tail bottle of the container medicine bottle queue in the tunnel type sterilizing dryer are adjusted in real time by combining with actual conditions, the air intake or the air exhaust of the preheating section and the cooling section are adjusted in real time, so that the pressure inside each functional section is kept unchanged, the pressure of the whole machine can be still balanced when the outside fluctuates, the pressure difference fluctuation in the bottle feeding stage and the tail bottle emptying stage in production is avoided, and the operation functional effect of each section is prevented from being influenced and parts such as a filter are prevented from being damaged.

Example two

The embodiment proposes a tunnel type sterilization dryer based on embodiment one, as shown in fig. 3, including preheating section 1, heating section 2 and cooling section 3 that connect gradually, the feed end of heating section 2 is provided with heating entry air brake SV1, the discharge end of heating section 2 is provided with heating exit air brake SV2, the discharge end of cooling section 3 is provided with oven exit air brake SV 3. The bottle conveying mesh belt 5 drives the container medicine bottles 4 to sequentially pass through the preheating section 1, the heating section 2 and the cooling section 3 for sterilization.

As shown in fig. 4, the preheating section 1, the heating section 2, and the cooling section 3 each include an adjustable air inlet fan assembly, an adjustable air outlet fan assembly, and a pressure gradient monitoring unit, wherein an output end of the pressure gradient monitoring unit is connected to an input end of the control unit 46, and an output end of the control unit 46 is connected to control ends of the air inlet fan assembly and the air outlet fan assembly.

In this embodiment, the air inlet fan assembly includes a first fan and a first frequency converter that are arranged in the corresponding preheating section 1 or heating section 2 or cooling section 3, the output end of the control unit 46 is connected with the first fan through the first frequency converter, the exhaust fan assembly includes a second fan and a second frequency converter that are arranged outside the corresponding preheating section 1 or heating section 2 or cooling section 3, and the output end of the control unit 46 is connected with the second fan through the second frequency converter.

Through the structure, the control unit 46 can individually control the air inlet fan assemblies and the air outlet fan assemblies in the preheating section 1, the heating section 2 and the cooling section 3 according to the feedback information of each pressure gradient monitoring unit, namely, the first frequency converter and the second frequency converter are controlled to adjust the rotating speeds of the first fan and the second fan, so as to change the pressure gradient value of the preheating section 1 or the heating section 2 or the cooling section 3 relative to the outside, thereby avoiding the situation that the pressure of each functional section is simultaneously increased or reduced, and being capable of individually adjusting the internal pressure of each functional section, so that the overall pressure can still be balanced when the outside fluctuates.

As shown in fig. 5 to 7, the first fan in this embodiment is: a preheating laminar flow fan 12, a high temperature laminar flow fan 21, and a cooling laminar flow fan 31;

the first frequency converter is: a preheating fan frequency converter 40, a cooling fan frequency converter 41 and a high temperature fan frequency converter (not shown in the figure);

the second fan is: preheating exhaust fan 16, high-temperature exhaust fan 26, cooling exhaust fan 38;

the second frequency converter is: a preheating exhaust frequency converter 42, a cooling exhaust frequency converter 44, and a high-temperature exhaust frequency converter 45;

the control end of the preheating laminar flow fan 12 is connected with the output end of the control unit 46 through a preheating fan frequency converter 40, the control end of the high-temperature laminar flow fan 21 is connected with the output end of the control unit 46 through a high-temperature fan frequency converter, the control end of the cooling laminar flow fan 31 is connected with the output end of the control unit 46 through a cooling fan frequency converter 41, the control end of the preheating exhaust fan 16 is connected with the output end of the control unit 46 through a preheating exhaust frequency converter 42, the control end of the high-temperature exhaust fan 26 is connected with the output end of the control unit 46 through a high-temperature exhaust frequency converter 45, and the control end of the cooling exhaust fan 38 is connected with the output end of the control unit 46 through a cooling exhaust frequency converter 44.

For practicing thrift the cost, the differential pressure monitoring between preheating section 1, heating section 2, the cooling section 3 does not have direct monitoring device in this embodiment, and pressure gradient monitoring unit is pressure transmitter, and pressure transmitter is: preheating pressure transmitter 43, high temperature pressure transmitter 47, cooling pressure transmitter 48, wherein, preheating pressure transmitter 43, high temperature pressure transmitter 47, the first collection end of cooling pressure transmitter 48 sets up in preheating section 1, heating section 2, cooling section 3, preheating pressure transmitter 43, high temperature pressure transmitter 47, the second collection end of cooling pressure transmitter 48 sets up in preheating section 1, heating section 2, the outside of cooling section 3, namely preheating pressure transmitter 43, high temperature pressure transmitter 47, the second collection end of cooling pressure transmitter 48 sets up in the washing and drying room, preheating pressure transmitter 43, high temperature pressure transmitter 47, the output of cooling pressure transmitter 48 is connected with the input of control unit 46 respectively. The pressure difference between the functional sections (namely the pressure difference between the preheating section 1 and the heating section 2 and the pressure difference between the heating section 2 and the cooling section 3) is converted by monitoring the pressure difference between the functional sections and the external washing and drying.

In this embodiment, the first collecting terminals of the preheating pressure transmitter 43, the high temperature pressure transmitter 47 and the cooling pressure transmitter 48 are respectively arranged at the positions 150mm below the preheating high-efficiency filter 14, the high-temperature high-efficiency filter 28 and the cooling high-efficiency filter 36. So as to accurately collect the internal pressure values of the preheating section 1, the heating section 2 and the cooling section 3.

As shown in fig. 5, the preheating section 1 of this embodiment includes a first air inlet disposed on the preheating box body 15, and a preheating laminar flow fan 12, a preheating fan housing 13, a preheating high-efficiency filter 14, a preheating exhaust fan 16, and a first exhaust duct 17 in the preheating box body 15, where the first air inlet is provided with a preheating coarse-efficiency filter 11. The first air inlet, the preheating laminar flow fan 12 and the first exhaust duct 17 are sequentially arranged to form a first air duct, and the preheating exhaust fan 16 is arranged on the first exhaust duct 17. With reference to the air flow arrow in fig. 4, the air flow of the preheating section 1 of this embodiment adopts an external circulation mode, the air entering from the first air inlet enters the negative pressure chamber where the preheating laminar flow fan 12 is located after being primarily filtered by the preheating coarse filter 11, enters the preheating air hood 13 under the adsorption load of the preheating laminar flow fan 12 and is uniformly and vertically blown to the preheating high efficiency filter 14 for secondary filtration, the laminar flow air after secondary filtration is vertically blown to the container medicine bottles 4 moving above the bottle conveying mesh belt 5 for preheating process treatment, and then the laminar flow air is exhausted through the first exhaust duct 17 under the adsorption of the preheating exhaust fan 16.

As shown in fig. 6, the heating section 2 in this embodiment includes an air supply opening 23 disposed on a high temperature box 24, and a high temperature laminar flow fan 21, a heating assembly 22, an air return frame 25, a high temperature high efficiency filter 28, a heating air cover 29, a high temperature exhaust fan 26, and a second exhaust duct 27 disposed in the high temperature box 24. The air supply opening 23, the high-temperature laminar flow fan 21 and the air return frame 25 are sequentially arranged to form a circulating air duct, the air return frame 25 is communicated with the second exhaust pipeline 17 to form an exhaust channel, and the high-temperature exhaust fan 26 is arranged on the second exhaust pipeline 17. In combination with the wind flow arrows in fig. 5, the wind flow of the heating section 2 in this embodiment adopts an internal circulation mode, a small amount of air entering from the position of the air supply opening 23 and a large amount of internal circulation wind enter the heating fan housing 29 under the adsorption load of the high-temperature laminar flow fan 21 after being heated by the heating assembly 22 and blow vertically to the high-temperature high-efficiency filter 28, the filtered laminar flow air blows vertically to the container vials 4 moving above the vial conveying belt 5, drying, sterilizing and removing heat source, then making the laminar air pass through the air return frame 25 of the heating section 2 and then enter the next operation cycle, wherein, because the air humidity at the feeding position of the heating section 2 is larger, a second exhaust duct 27 is arranged at the bottom, part of the high-temperature and high-humidity air is discharged out of the heating section 2 through the high-temperature exhaust fan 26, and at the same time, the pressure gradient inside and outside the heating section 2 can be controlled.

As shown in fig. 7, the cooling section 3 in this embodiment includes a second air inlet on the cooling box 35, a laminar cooling fan 31, a high-efficiency cooling filter 36, and a cooling fan cover 37 in the cooling box 35, and further includes a cooling exhaust fan 38 and a third exhaust duct 34, the second air inlet is the cooling section air inlet 32 in fig. 6, the cooling section air inlet 32 is further provided with a coarse cooling filter 33, the cooling section air inlet 32, the laminar cooling fan 31, and the third exhaust duct 34 are sequentially arranged to form a second air duct, and the cooling exhaust fan 38 is disposed on the third exhaust duct 34. With reference to the airflow arrow in fig. 6, the airflow of the cooling section 3 in this embodiment adopts an external circulation mode, a large amount of cold air enters from the cooling section air inlet 32, after being primarily filtered by the cooling section coarse filter 33, enters the cooling fan housing 37 under the adsorption load of the cooling laminar flow fan 31 and is vertically blown to the cooling section high efficiency filter 36 for secondary filtering, the secondary filtered laminar flow air is vertically blown to the container medicine bottles 4 moving above the bottle conveying net belt 5 for cooling process treatment, and then is discharged out of the cooling box 35 through the exhaust duct 34 under the action of the cooling exhaust fan 38.

In this embodiment, preheating section 1, cooling section 3 are provided with independent exhaust pipe, air inlet machine subassembly and exhaust fan subassembly respectively to can separately control preheating section 1, the pressure condition of cooling section 3 respectively, avoid the condition that the pressure of two functional sections risees simultaneously or reduces.

The following is a specific implementation process of this embodiment:

an unloaded state: after the installation of the whole machine in a customer pharmaceutical factory is completed, the working opening degrees of the preheating exhaust fan 16 and the cooling exhaust fan 38 are adjusted to appropriate values of the working ranges thereof (namely, the space adjustable up and down can be ensured in subsequent adjustment) and are kept unchanged at this stage, at this time, the room pressure of the washing and drying room and the working pressure of the filling room are adjusted to the state in normal production, the working frequencies of the preheating laminar flow fan 12, the high-temperature laminar flow fan 21 and the cooling laminar flow fan 31 are adjusted through pressure difference display so as to enable the whole machine system to reach a wind pressure balance design gradient meeting hundred-level laminar flow, and after the balance gradient is stable, the working frequency of the high-temperature laminar flow fan 21 is not changed any more:

firstly, the air quantity of the preheating laminar flow fan 12 is controlled by gradually adjusting the frequency of the frequency converter 40 of the preheating fan by taking the range of 0-50HZ as a step length through the pressure gradient between the preheating section 1 and the washing and drying monitored by the preheating pressure transmitter 43 until the pressure of the preheating section 1 is higher than the pressure of the washing and drying room by 2-10 pa.

Then, the air volume of the high-temperature laminar flow fan 21 is controlled by gradually adjusting the frequency of the frequency converter of the high-temperature fan by taking the range of 0-50HZ as a step length through the pressure gradient between the heating section 2 and the washing and drying room monitored by the high-temperature pressure transmitter 47 until the pressure of the heating section 2 is higher than the pressure of the washing and drying room by 3-12 pa.

Finally, the air volume of the cooling laminar flow fan 31 is controlled by gradually adjusting the frequency of the frequency converter 41 of the cooling fan by taking the range of 0-50HZ as a step length through the pressure gradient between the cooling section 3 and the washing and drying room monitored by the cooling pressure transmitter 48 until the pressure of the cooling section 3 is higher than the pressure of the washing and drying room by the range of 2-10 pa.

It should be noted that, when adjusting the frequencies corresponding to the preheating laminar flow fan 12, the high temperature laminar flow fan 21, and the cooling laminar flow fan 31, the commissioning personnel may adjust the operating frequencies of the preheating laminar flow fan 12, the high temperature laminar flow fan 21, and the cooling laminar flow fan 31 to the reasonable frequency and then perform fine adjustment with the range of 0 to 50HZ as a step length, after combining the past empirical values.

When normal production is finished by debugging, the bottle feeding stage begins, the initial working frequencies of the preheating laminar flow fan 12, the high-temperature laminar flow fan 21, the cooling laminar flow fan 31, the preheating exhaust fan 16, the high-temperature exhaust fan 26 and the cooling exhaust fan 38 are unchanged, the rotating speed at the moment is taken as the initial rotating speed, the working frequencies of the preheating laminar flow fan 12, the cooling laminar flow fan 31, the preheating exhaust fan 16 and the cooling exhaust fan 38 are automatically adjusted according to the bottle feeding position to maintain the balance of the internal pressure gradient, and the specific working conditions are as follows:

a bottle feeding stage:

the production bottle feeding stage is a process from no-load (no bottle on the net belt) to full load (bottle on the net belt), a heating inlet air lock SV1, a heating outlet air lock SV2 and an oven outlet air lock SV3 are closed to opened. When the bottle is fed, the heating inlet air lock SV1 is closed, and because the bottle is fed to block laminar air blown by the preheating laminar flow fan 12, the pressure difference of the preheating section 1 is gradually increased, and at the moment, the preheating pressure transmitter 43 monitors that the pressure gradient between the preheating section 1 and the washing and drying is higher than a set first upper limit, so that in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the preheating fan frequency converter 40 to reduce the rotating speed of the preheating laminar flow fan 12, reduce the air volume of the discharged air, avoid the fluctuation of the preheating pressure difference, and in order to reduce the adjustment time, the control unit 46 can also control the preheating exhaust frequency converter 42 to increase the rotating speed of the preheating exhaust fan 16; in the same way, the pressure gradient monitored by the high-temperature pressure transmitter 47 and the cooling pressure transmitter 48 is increased and changed into fluctuation after entering the heating section 2 and the cooling section 3; before the bottle enters the oven outlet air lock SV3, when the oven outlet air lock SV3 is opened, the laminar flow air of the cooling laminar flow fan 31 blocked by the bottle and the air filled in the filling room enable the pressure difference of the cooling section 3 to be continuously increased, at the moment, the cooling pressure transmitter 48 monitors that the pressure gradient between the cooling section 3 and the washing and drying room is higher than a set second upper limit, so in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the cooling fan frequency converter 41 to reduce the rotating speed of the cooling laminar flow fan 31, reduce the air exhaust volume, avoid the fluctuation of the cooling pressure difference, meet the control requirement, and in order to reduce the adjustment time, the control unit 46 can also control the cooling air exhaust frequency converter 44 to increase the rotating speed of the cooling air exhaust fan 38.

And (3) tail bottle emptying stage:

the production tail bottle emptying stage is a process from full load (with bottles on the net belt) to empty load (without bottles on the net belt), a heating inlet air lock SV1, a heating outlet air lock SV2 and an oven outlet air lock SV3 are opened to be closed.

When emptying begins, because the bottle cannot block laminar air blown by the preheating laminar flow fan 12 when emptying, the pressure difference of the preheating section 1 is gradually reduced, and at the moment, the preheating pressure transmitter 43 monitors that the pressure gradient between the preheating section 1 and the washing and drying is lower than a set first lower limit value, in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the preheating fan frequency converter 40 to increase the rotating speed of the preheating laminar flow fan 12, increase the air exhaust volume, avoid the fluctuation of the preheating pressure difference, and in order to reduce the adjustment time, the control unit 46 can also control the preheating exhaust frequency converter 42 to reduce the rotating speed of the preheating exhaust fan 16; when the mesh belt completely enters the heating section 2 after passing through the heating inlet air brake SV1, the preheating section 1 is in an idle load state, the heating inlet air brake SV1 is closed, at this time, the influence of the heating section 2 on the preheating section 1 is reduced, most of the pressure difference of the preheating section 1 is influenced by the rotating speed of the preheating laminar flow fan 12, and the control unit 46 starts to control the preheating fan frequency converter 40 to adjust the rotating speed of the preheating laminar flow fan 12 to recover the initial set value and maintain the idle load pressure difference. In the same way, the bottle is emptied through the heating section 2 and the cooling section 3, and the pressure gradient monitored by the high-temperature pressure transmitter 47 and the cooling pressure transmitter 48 is also reduced and changed into fluctuation; when the bottle is emptied to the front of an oven outlet air lock SV3 at the rear part of the cooling section 3, the bottle is not provided with the blocked cooling laminar flow air, and only the air filled in the filling room is the air, at the moment, the cooling pressure transmitter 48 monitors that the pressure gradient between the cooling section 3 and the washing and drying room is possibly lower than the set second lower limit value, so that in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the cooling fan frequency converter 41 to increase the rotating speed of the cooling laminar flow fan 31, increase the pressure difference, avoid the fluctuation of the cooling pressure difference, meet the control requirement, and in order to reduce the adjustment time, the control unit 46 can also control the cooling exhaust frequency converter 44 to reduce the rotating speed of the cooling exhaust fan 38. When the bottles are emptied and leave the oven outlet air lock SV3, the oven outlet air lock SV3 is closed, the control unit 46 starts to control the cooling fan frequency converter 41 to adjust the cooling layer flow fan 31 to recover the initial rotating speed, and controls the cooling exhaust frequency converter 44 to adjust the cooling exhaust fan 38 to recover the initial rotating speed, and the whole state of the oven is recovered to be an unloaded state. At this time, the operation is performed only in the idle state. This completes the whole process control of the production flow.

EXAMPLE III

This embodiment proposes a tunnel sterilization dryer wind pressure balance control system according to the embodiment one, includes:

the initial pressure adjusting unit is used for respectively adjusting the air intake of the preheating section, the heating section and the cooling section, so that the pressure gradient values of the preheating section, the heating section and the cooling section relative to the washing and drying room are all in a preset threshold range, and the air intake and the air exhaust of the preheating section and the cooling section at the moment are used as initial values;

the pressure reduction unit is used for reducing the air intake of the preheating section or increasing the air exhaust of the preheating section until the pressure gradient value of the preheating section relative to the washing and drying room is within a preset threshold range after the first bottle of the container medicine bottle queue reaches the preheating section, and reducing the air intake of the cooling section or increasing the air exhaust of the cooling section until the pressure gradient value of the cooling section relative to the washing and drying room is within the preset threshold range after the first bottle of the container medicine bottle queue reaches the cooling section;

and the pressure lifting unit is used for increasing the air intake of the preheating section or reducing the air exhaust of the preheating section until the pressure gradient value of the preheating section relative to the washing and drying room is within a preset threshold range after the tail bottles of the container medicine bottle queue reach the heating section, increasing the air intake of the cooling section or reducing the air exhaust of the cooling section until the pressure gradient value of the cooling section relative to the washing and drying room is within a preset threshold range after the tail bottles of the container medicine bottle queue reach the cooling section, and recovering the air intake and the air exhaust of the preheating section and the cooling section to initial values after the container medicine bottles are emptied from the cooling section.

The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.