阅读说明：本技术 烘干设备控制方法、控制装置及烘干设备 (Drying equipment control method and device and drying equipment ) 是由 林声杰 贺春辉 宋平 潘盘波 邓连操 于 2021-08-23 设计创作，主要内容包括：本发明公开了一种烘干设备控制方法、控制装置及烘干设备,其中,该方法包括：检测烘烤室的湿球温度,根据湿球温度调节新风阀的开度和排湿风机的档位；判断湿球温度是否位于预设湿球温度范围内,如果是,则检测烘烤室的干球温度；根据干球温度控制烘烤设备的运行,直至干球温度达到预设干球温度范围。本发明解决了现有技术中烘干设备排湿过程不够智能的问题,有效提高了排湿速率,同时提高了排湿过程中温度的稳定性。(The invention discloses a drying equipment control method, a control device and drying equipment, wherein the method comprises the following steps: detecting the wet bulb temperature of the baking chamber, and adjusting the opening of a fresh air valve and the gear of a moisture exhaust fan according to the wet bulb temperature; judging whether the wet bulb temperature is within a preset wet bulb temperature range, and if so, detecting the dry bulb temperature of the baking chamber; and controlling the baking equipment to operate according to the dry bulb temperature until the dry bulb temperature reaches a preset dry bulb temperature range. The invention solves the problem that the dehumidification process of the drying equipment in the prior art is not intelligent enough, effectively improves the dehumidification rate, and simultaneously improves the temperature stability in the dehumidification process.)

1. A drying equipment control method is characterized in that drying equipment comprises a fresh air dehumidifying device, baking equipment and a baking chamber, wherein the fresh air dehumidifying device is provided with a fresh air inlet, and the fresh air inlet is provided with a fresh air valve; the baking chamber is provided with a moisture exhausting window, and the moisture exhausting window is provided with a moisture exhausting fan; the method comprises the following steps:

detecting the wet bulb temperature of the baking chamber, and adjusting the opening of the fresh air valve and the gear of the moisture exhaust fan according to the wet bulb temperature;

judging whether the wet bulb temperature is within a preset wet bulb temperature range, and if so, detecting the dry bulb temperature of the baking chamber;

and controlling the baking equipment to operate according to the dry bulb temperature until the dry bulb temperature reaches a preset dry bulb temperature range.

2. The method of claim 1, wherein adjusting the opening of the fresh air valve and the gear of the moisture exhaust fan according to the wet bulb temperature comprises:

calculating the difference value between the wet bulb temperature and a first preset temperature to serve as a wet bulb difference value;

when the wet-bulb difference value is larger than a first preset difference value, detecting the absolute moisture content of the baking chamber and the absolute moisture content of fresh air;

calculating a moisture content difference between an absolute moisture content of the baking chamber and an absolute moisture content of the fresh air;

and adjusting the opening degree of the fresh air valve and the gear of the moisture exhaust fan according to the moisture content difference value.

3. The method of claim 2, wherein adjusting the opening of the fresh air valve and the gear of the moisture content blower based on the moisture content difference comprises:

judging the range of the moisture content difference value;

determining the initial opening of the fresh air valve and the initial gear of the moisture exhausting fan according to the interval range; a corresponding relation table of the interval range of the moisture content difference value, the initial opening degree of the fresh air valve and the initial gear of the dehumidifying fan is preset;

and controlling the fresh air valve to operate for a first preset time according to the initial opening degree, and controlling the dehumidifying fan to operate for the first preset time according to the initial gear.

4. The method of claim 3, further comprising, after controlling the dehumidifying fan to operate for the first preset time according to the initial gear:

re-detecting the wet bulb temperature, and calculating the wet bulb difference value;

and when the wet bulb difference value is larger than a first preset difference value, adjusting the opening degree of the fresh air valve and the gear of the moisture exhausting fan.

5. The method of claim 4, wherein adjusting the opening of the fresh air valve and the gear of the moisture exhaust fan comprises: adjusting the opening of the fresh air valve according to the initial opening, and adjusting the gear of the moisture exhaust fan according to the initial gear; wherein the content of the first and second substances,

adjusting the opening degree of the fresh air valve according to the initial opening degree, and the method comprises the following steps: when the initial opening degree is larger than a first preset opening degree, controlling the opening degree of the fresh air valve to increase by a second preset opening degree; otherwise, keeping the opening degree of the fresh air valve unchanged;

adjusting the gear of the dehumidifying fan according to the initial gear, comprising: when the initial gear is smaller than a first preset gear, controlling the gear of the moisture exhaust fan to increase a second preset gear; otherwise, controlling the gear of the moisture exhaust fan to increase a third preset gear; and the third preset gear is larger than the second preset gear.

6. The method of claim 4, wherein determining whether the wet bulb temperature is within a predetermined wet bulb temperature range comprises:

starting timing after the opening degree of the fresh air valve and the gear of the moisture exhaust fan are adjusted;

and after the timing time reaches a second preset time, re-detecting the wet bulb temperature, and judging whether the wet bulb temperature is within the preset wet bulb temperature range.

7. The method of claim 2, further comprising:

when the wet bulb difference value is not larger than the first preset difference value, judging whether the wet bulb difference value is within a first preset difference value range;

if so, maintaining the current operating parameters of the baking equipment;

otherwise, adjusting the wet bulb difference value to the first preset difference value range.

8. The method of claim 1, further comprising, prior to detecting the wet bulb temperature of the bake chamber:

detecting the dry bulb temperature, and controlling the baking equipment to operate according to the dry bulb temperature until the dry bulb temperature reaches the preset dry bulb temperature range;

and after the dry bulb temperature reaches the preset dry bulb temperature range, triggering and detecting the wet bulb temperature of the baking chamber.

9. The method of claim 1 or 8, wherein controlling the operation of the toasting device in dependence of the dry-bulb temperature comprises:

calculating the difference value between the dry-bulb temperature and a second preset temperature to serve as a dry-bulb difference value;

when the dry ball difference value meets a second preset difference value range, maintaining the current operation parameters of the baking equipment;

otherwise, adjusting the operating frequency of the baking equipment according to the dry-ball difference value until the dry-ball difference value meets the second preset difference value range.

10. The method of claim 9, wherein adjusting the operating frequency of the toasting device in accordance with the dry-bulb difference comprises:

when the dry-bulb difference value is larger than a second preset difference value, controlling the running frequency to increase; the larger the dry-bulb difference value is, the larger the amplitude of the operating frequency is until the operating frequency reaches a preset maximum operating frequency;

when the dry-bulb difference value is smaller than a third preset difference value, controlling the running frequency to be reduced; wherein the third preset difference is smaller than the second preset difference; the larger the dry-bulb difference value is, the larger the reduction amplitude of the operation frequency is until the baking equipment is in standby operation.

11. A drying equipment control device is characterized in that drying equipment comprises a fresh air dehumidifying device, baking equipment and a baking chamber, wherein the fresh air dehumidifying device is provided with a fresh air inlet which is provided with a fresh air valve; the baking chamber is provided with a moisture exhausting window, and the moisture exhausting window is provided with a moisture exhausting fan; the device comprises:

the detection module is used for detecting the wet bulb temperature of the baking chamber and adjusting the opening of the fresh air valve and the gear of the moisture exhaust fan according to the wet bulb temperature;

the judging module is used for judging whether the wet bulb temperature is within a preset wet bulb temperature range, and if so, detecting the dry bulb temperature of the baking chamber;

and the control module is used for controlling the baking equipment to operate according to the dry-bulb temperature until the dry-bulb temperature reaches a preset dry-bulb temperature range.

12. A drying apparatus characterized by comprising the drying apparatus control device of claim 11.

13. A storage medium containing computer-executable instructions, characterized in that the computer-executable instructions, when executed by a computer processor, are for performing a drying apparatus control method according to any one of claims 1 to 10.

Technical Field

The invention relates to the technical field of tobacco drying, in particular to a drying device control method, a control device and a drying device.

Background

With the development of the times, the tobacco is more widely used, and particularly has higher medical value when being used as medicine. Before the final product of the tobacco, a plurality of processes are required, wherein the tobacco baking is the most critical step and determines the quality of the finished product of the tobacco. In the tobacco baking treatment process, a heat pump heating technology is generally adopted, and the technology can improve the baking quality of tobacco leaves and reduce the working difficulty of tobacco leaf baking. The heat pump drying technology belongs to one of the heating drying technology, and the principle is that according to reverse Carnot cycle principle, the heat of external environment is absorbed, and this part of heat is transferred to the drying chamber again, improves temperature wherein to heating the drying material, making moisture break away from the drying material, the corresponding drying device of deuterogamying discharges moisture, finally accomplishes the dehumidification drying of material.

The tobacco curing time is divided into three sections, wherein the first stage yellowing stage has great moisture removal requirements, the tobacco is festered due to too small moisture removal force, and the tobacco is shriveled and can not be smoothly yellowed due to too large moisture removal force.

In the period that the dehumidifying requirement of the dryer is great, namely the yellowing period, if the humidity of the outside is great, the temperature of a wet bulb in the baking chamber cannot be reduced to a set value by adjusting the fresh air valve, and the opening of the dehumidifying window needs to be manually adjusted to be large for dehumidifying. However, if the moisture discharging opening is too large, a large amount of moisture and heat in the roasting chamber can be discharged, and the wet bulb temperature is reduced, but the dry bulb temperature is also reduced. Therefore, the whole moisture removing process is difficult to stabilize, and the tobacco curing effect is reduced.

Aiming at the problem that the dehumidification process of drying equipment in the related art is not intelligent enough, no effective solution is provided at present.

Disclosure of Invention

The invention provides a drying device control method, a control device and a drying device, which at least solve the problem that the humidity discharging process of the drying device in the prior art is not intelligent enough.

In order to solve the technical problem, according to an aspect of an embodiment of the present invention, a control method for a drying device is provided, where the drying device includes a fresh air dehumidifying apparatus, a baking device, and a baking chamber, where the fresh air dehumidifying apparatus has a fresh air inlet, and the fresh air inlet is provided with a fresh air valve; the baking chamber is provided with a moisture exhausting window which is provided with a moisture exhausting fan; the method comprises the following steps: detecting the wet bulb temperature of the baking chamber, and adjusting the opening of a fresh air valve and the gear of a moisture exhaust fan according to the wet bulb temperature; judging whether the wet bulb temperature is within a preset wet bulb temperature range, and if so, detecting the dry bulb temperature of the baking chamber; and controlling the baking equipment to operate according to the dry bulb temperature until the dry bulb temperature reaches a preset dry bulb temperature range.

Further, according to wet bulb temperature regulation fresh air valve's aperture and the gear of hydrofuge fan, include: calculating the difference value between the wet bulb temperature and the first preset temperature to serve as a wet bulb difference value; when the wet-bulb difference value is larger than a first preset difference value, detecting the absolute moisture content of the baking chamber and the absolute moisture content of the fresh air; calculating the moisture content difference between the absolute moisture content of the baking chamber and the absolute moisture content of the fresh air; and adjusting the opening degree of the fresh air valve and the gear of the moisture exhaust fan according to the moisture content difference.

Further, according to moisture content difference, adjust the aperture of new blast gate and the gear of hydrofuge fan, include: judging the range of the moisture content difference value; determining the initial opening of the fresh air valve and the initial gear of the moisture exhausting fan according to the interval range; the corresponding relation table of the interval range of the moisture content difference, the initial opening degree of the fresh air valve and the initial gear of the moisture exhaust fan is preset; and controlling the fresh air valve to operate for a first preset time according to the initial opening degree, and controlling the dehumidifying fan to operate for the first preset time according to the initial gear.

Further, after controlling the dehumidifying fan to operate for a first preset time according to the initial gear, the method further comprises: re-detecting the wet bulb temperature, and calculating a wet bulb difference value; and when the wet bulb difference value is larger than a first preset difference value, adjusting the opening degree of the fresh air valve and the gear of the moisture exhaust fan.

Further, adjust the aperture of new blast gate and the gear of hydrofuge fan, include: adjusting the opening of the fresh air valve according to the initial opening, and adjusting the gear of the moisture exhaust fan according to the initial gear; wherein, adjust the aperture of fresh air valve according to initial aperture, include: when the initial opening degree is larger than the first preset opening degree, controlling the opening degree of the fresh air valve to increase by a second preset opening degree; otherwise, keeping the opening of the fresh air valve unchanged; according to initial gear adjusting moisture exhausting fan's gear, include: when the initial gear is smaller than a first preset gear, controlling the gear of the moisture exhaust fan to increase a second preset gear; otherwise, controlling the gear of the moisture exhaust fan to increase a third preset gear; and the third preset gear is larger than the second preset gear.

Further, judge whether wet bulb temperature is located predetermine wet bulb temperature range, include: starting timing after the opening degree of the fresh air valve and the gear of the moisture exhausting fan are adjusted; and after the timing time reaches a second preset time, re-detecting the wet bulb temperature, and judging whether the wet bulb temperature is within a preset wet bulb temperature range.

Further, still include: when the wet bulb difference value is not larger than a first preset difference value, judging whether the wet bulb difference value is within a first preset difference value range; if so, maintaining the current operating parameters of the baking equipment; otherwise, adjusting the wet bulb difference value to a first preset difference value range.

Further, before detecting the wet bulb temperature of the baking chamber, the method further comprises the following steps: detecting the temperature of the dry balls, and controlling the operation of baking equipment according to the temperature of the dry balls until the temperature of the dry balls reaches a preset temperature range of the dry balls; and after the dry bulb temperature reaches a preset dry bulb temperature range, triggering and detecting the wet bulb temperature of the baking chamber.

Further, controlling the operation of the toasting device in dependence of the dry-bulb temperature comprises: calculating the difference value between the dry bulb temperature and the second preset temperature to serve as the dry bulb difference value; when the dry ball difference value meets a second preset difference value range, maintaining the current operation parameters of the baking equipment; otherwise, adjusting the operating frequency of the baking equipment according to the dry-ball difference value until the dry-ball difference value meets a second preset difference value range.

Further, the operation frequency of the baking equipment is adjusted according to the dry-bulb difference value, and the operation frequency comprises the following steps: when the dry ball difference value is larger than a second preset difference value, controlling the running frequency to increase; the larger the dry-bulb difference value is, the larger the amplitude of the running frequency is until the running frequency reaches a preset maximum running frequency; when the dry-bulb difference value is smaller than a third preset difference value, controlling the running frequency to be reduced; wherein the third preset difference is smaller than the second preset difference; the larger the dry-bulb difference value is, the larger the reduction amplitude of the operation frequency is until the baking equipment is in standby operation.

According to another aspect of the embodiment of the invention, a drying device control device is provided, wherein the drying device comprises a fresh air dehumidifying device, a baking device and a baking chamber, wherein the fresh air dehumidifying device is provided with a fresh air inlet, and the fresh air inlet is provided with a fresh air valve; the baking chamber is provided with a moisture exhausting window which is provided with a moisture exhausting fan; the device comprises: the detection module is used for detecting the wet bulb temperature of the baking chamber and adjusting the opening of the fresh air valve and the gear of the moisture exhaust fan according to the wet bulb temperature; the judging module is used for judging whether the wet bulb temperature is within a preset wet bulb temperature range, and if so, detecting the dry bulb temperature of the baking chamber; and the control module is used for controlling the operation of the baking equipment according to the dry-bulb temperature until the dry-bulb temperature reaches a preset dry-bulb temperature range.

According to still another aspect of the embodiments of the present invention, there is provided a drying apparatus including the drying apparatus control device as described above.

According to yet another aspect of embodiments of the present invention, there is provided a storage medium containing computer-executable instructions for performing the drying apparatus control method as described above when executed by a computer processor.

In the invention, a moisture exhaust fan is arranged on a moisture exhaust window of a baking chamber of the drying equipment, and the opening degree of a fresh air valve and the gear of the moisture exhaust fan are adjusted according to the temperature of a wet bulb. The size of the moisture discharging amount can be accurately adjusted through the moisture discharging fan, the corresponding moisture discharging fan control logic is arranged, proper adjustment is carried out according to requirements, the problem that the moisture discharging control is not intelligent enough in the prior art can be effectively solved, the situation that the moisture discharging requirement is large, rapid moisture discharging cannot be carried out, and the temperature of a dry wet bulb of a drying chamber is unstable during moisture discharging is avoided, so that the moisture discharging speed is effectively improved, and the temperature stability in the moisture discharging process is improved. Especially for the tobacco leaf baking, the baking effect is improved.

Drawings

Fig. 1 is an alternative structure diagram of a drying apparatus according to an embodiment of the present invention;

FIG. 2 is an alternative schematic illustration of a tobacco flue-curing process cycle according to an embodiment of the invention;

fig. 3 is an alternative flowchart of a control method of a drying apparatus according to an embodiment of the present invention;

fig. 4 is another alternative flowchart of a drying apparatus control method according to an embodiment of the present invention; and

fig. 5 is a block diagram of an alternative structure of a control device of a drying apparatus according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

Example 1

In preferred embodiment 1 of the present invention, there is provided a control method of a drying apparatus, applied to a drying apparatus, and in particular, fig. 1 illustrates an alternative structural schematic diagram of the drying apparatus, as shown in fig. 1, the drying apparatus includes:

the drying equipment comprises a fresh air dehumidifying device, baking equipment and a baking chamber, wherein the fresh air dehumidifying device is provided with a fresh air inlet, and a fresh air valve is arranged at the fresh air inlet 5; the baking chamber is provided with a moisture exhaust window, and the moisture exhaust window 8 is provided with a moisture exhaust fan; in addition, still include heat pump system, heat pump system includes outer evaporimeter 1, compressor 2, sets up outside baking chamber, carries out the heat transfer through plate heat exchanger and axial fan and outside air. The condenser 3 of the heat pump system emits heat to heat fresh air entering through a fresh air inlet or mixed return air formed by mixing the fresh air and return air output from an air outlet 7 in the baking chamber, and the heated fresh air or mixed return air is conveyed into the baking chamber through an air outlet 6 by a fan 4 and can be used for baking tobacco leaves. Furthermore, an electric heater 9, and a temperature and humidity sensor 10 are provided.

Figure 2 shows a tobacco leaf curing process cycle, as shown in figure 2, including a yellowing stage, a fixation stage and a drying stage. In the three-stage baking process mode corresponding to the yellowing stage, the color fixing stage and the tendon drying stage.

Based on the drying device in fig. 1, in the preferred embodiment 1 of the present invention, a drying device control method is provided, which is applied to the above-mentioned drying device, and the control method is mainly applied to the first stage yellowing stage (fig. 2) in the "three-stage" of tobacco curing, when the moisture removal requirement is the greatest. Specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S302-S306:

s302: detecting the wet bulb temperature of the baking chamber, and adjusting the opening of a fresh air valve and the gear of a moisture exhaust fan according to the wet bulb temperature;

s304: judging whether the wet bulb temperature is within a preset wet bulb temperature range, and if so, detecting the dry bulb temperature of the baking chamber;

s306: and controlling the baking equipment to operate according to the dry bulb temperature until the dry bulb temperature reaches a preset dry bulb temperature range.

In the above embodiment, the dehumidifying fan is provided at the dehumidifying window of the drying chamber of the drying device, and the opening degree of the fresh air valve and the gear of the dehumidifying fan are adjusted according to the wet bulb temperature. The size of the moisture discharging amount can be accurately adjusted through the moisture discharging fan, the corresponding moisture discharging fan control logic is arranged, proper adjustment is carried out according to requirements, the problem that the moisture discharging control is not intelligent enough in the prior art can be effectively solved, the situation that the moisture discharging requirement is large, rapid moisture discharging cannot be carried out, and the temperature of a dry wet bulb of a drying chamber is unstable during moisture discharging is avoided, so that the moisture discharging speed is effectively improved, and the temperature stability in the moisture discharging process is improved. Especially for the tobacco leaf baking, the baking effect is improved.

According to wet bulb temperature regulation fresh air valve's aperture and the gear of hydrofuge fan, include: calculating the difference value between the wet bulb temperature and the first preset temperature to serve as a wet bulb difference value; when the wet-bulb difference value is larger than a first preset difference value, detecting the absolute moisture content of the baking chamber and the absolute moisture content of the fresh air; calculating the moisture content difference between the absolute moisture content of the baking chamber and the absolute moisture content of the fresh air; and adjusting the opening degree of the fresh air valve and the gear of the moisture exhaust fan according to the moisture content difference. When the wet bulb difference value is not larger than a first preset difference value, judging whether the wet bulb difference value is within a first preset difference value range; if so, maintaining the current operating parameters of the baking equipment; otherwise, adjusting the wet bulb difference value to a first preset difference value range. The main way of adjusting the wet bulb difference value is to adjust the opening degree of an electronic expansion valve of the heat pump system and the operation frequency of the heat pump system.

Wherein, according to the aperture of moisture content difference regulation fresh air valve and the gear of hydrofuge fan, include: judging the range of the moisture content difference value; determining the initial opening of the fresh air valve and the initial gear of the moisture exhausting fan according to the interval range; wherein, a corresponding relation table of the interval range with the moisture content difference value, the initial opening degree of the fresh air valve and the initial gear of the moisture exhaust fan is preset as shown in the following table 1; and controlling the fresh air valve to operate for a first preset time according to the initial opening gear, and controlling the dehumidifying fan to operate for a first preset time according to the initial gear. The opening degree or the initial opening degree of the fresh air valve in the method can refer to a specific angle value and can also refer to an opening degree gear.

TABLE 1

The absolute moisture content parameter represents the water vapor amount contained in each kilogram of dry air, and the absolute moisture content difference value of the baking chamber and the fresh air is detected, so that the humidity of the fresh air at the moment can be judged. The opening gear of the fresh air valve is 1-10 gears, the gear of the moisture exhausting fan is 1-10 gears, if the absolute moisture content difference value is large, the opening of the fresh air valve can be opened, more fresh air can be introduced, meanwhile, the moisture exhausting fan is opened at a low gear, the dryer returns air from the upper air outlet, a large amount of low-humidity fresh air introduced can bring the high-temperature high-humidity air flow at the bottom of the original baking chamber to the upper part of the baking chamber, and therefore the high-temperature high-humidity air flow can be discharged through the moisture exhausting fan. If the absolute moisture content is small, the opening of the fresh air valve cannot be opened too much, a certain amount of fresh air is introduced, and then the fresh air valve is opened to discharge moisture through a large moisture discharge fan. The opening degree of the fresh air valve and the gear of the moisture exhaust fan in the table 1 can be set according to different climates in different regions.

After controlling the dehumidifying fan to operate for a first preset time according to an initial gear, the method further comprises the following steps: re-detecting the wet bulb temperature, and calculating a wet bulb difference value; and when the wet bulb difference value is larger than a first preset difference value, adjusting the opening degree of the fresh air valve and the gear of the moisture exhaust fan. Specifically, adjust the aperture of new blast gate and the gear of hydrofuge fan, include: adjusting the opening of the fresh air valve according to the initial opening, and adjusting the gear of the moisture exhaust fan according to the initial gear; wherein, adjust the aperture of fresh air valve according to initial aperture, include: when the initial opening degree is larger than the first preset opening degree, controlling the opening degree of the fresh air valve to increase by a second preset opening degree; otherwise, keeping the opening of the fresh air valve unchanged; according to initial gear adjusting moisture exhausting fan's gear, include: when the initial gear is smaller than a first preset gear, controlling the gear of the moisture exhaust fan to increase a second preset gear; otherwise, controlling the gear of the moisture exhaust fan to increase a third preset gear; and the third preset gear is larger than the second preset gear. After the operation under the initial opening degree of the fresh air valve and the initial wind gear of the moisture removing fan, if the set humidity value is not met, the adjustment is needed. If the initial opening degree of the fresh air valve is larger than a first preset opening degree, for example, 5, the moisture content of the outer ring in the area is not large, the first gear can be increased upwards for further control, and otherwise, the original opening degree is maintained unchanged; if the initial wind gear of the moisture exhaust fan is smaller than a first preset gear, for example, 3 gears, at the moment, a second preset gear, for example, 1 gear, is increased for increasing moisture exhaust, and if the initial wind gear of the moisture exhaust fan is larger than 3 gears, a third preset gear, for example, 2 gears, is increased, so that the accurate control of distinguishing the moisture content of the fresh air is realized.

Judge whether wet bulb temperature is located predetermine wet bulb temperature range, include: starting timing after the opening degree of the fresh air valve and the gear of the moisture exhausting fan are adjusted; and after the timing time reaches a second preset time, re-detecting the wet bulb temperature, and judging whether the wet bulb temperature is within a preset wet bulb temperature range.

In addition, before detecting the wet bulb temperature of the baking chamber, the method further comprises the following steps: detecting the temperature of the dry balls, and controlling the operation of baking equipment according to the temperature of the dry balls until the temperature of the dry balls reaches a preset temperature range of the dry balls; and after the dry bulb temperature reaches a preset dry bulb temperature range, triggering and detecting the wet bulb temperature of the baking chamber. Controlling the operation of the toasting device in dependence on the dry bulb temperature, comprising: calculating the difference value between the dry bulb temperature and the second preset temperature to serve as the dry bulb difference value; when the dry ball difference value meets a second preset difference value range, maintaining the current operation parameters of the baking equipment; otherwise, adjusting the operating frequency of the baking equipment according to the dry-ball difference value until the dry-ball difference value meets a second preset difference value range.

Adjusting the operating frequency of the toasting device according to the dry-bulb difference, comprising: when the dry ball difference value is larger than a second preset difference value, controlling the running frequency to increase; the larger the dry-bulb difference value is, the larger the amplitude of the running frequency is until the running frequency reaches a preset maximum running frequency; when the dry-bulb difference value is smaller than a third preset difference value, controlling the running frequency to be reduced; wherein the third preset difference is smaller than the second preset difference; the larger the dry-bulb difference value is, the larger the reduction amplitude of the operation frequency is until the baking equipment is in standby operation. Table 2 below shows a correspondence table between the dry-bulb temperature Δ T and the operating frequency, where ↓ indicates a decrease and ↓ indicates an increase.

TABLE 2

Temperature of dry bulb. DELTA.T	≥Y1	(Y2，Y1)	(Y3，Y2)	(Y4，Y3)
					Frequency variation	↑A HZ	↑B HZ	↑C HZ	↑D HZ
Temperature of dry bulb. DELTA.T	(Y5，Y4)	(Y6，Y5)	(Y7，Y6)	＜Y7
					Frequency variation	Maintaining frequency	↓E HZ	↓F HZ	Standby

The moisture exhaust fan control is added on the moisture exhaust window for accurate and efficient moisture exhaust, but the moisture exhaust is improved while the dry bulb temperature of the baking chamber cannot be influenced, so after the wet bulb temperature is stabilized, the frequency adjustment is carried out through the parameters of the table 2, the parameters of the table can be selected to be A-8, B-5, C-2, D-1, E-2, F-5, and the value and the frequency value of the delta T can be actually adjusted according to the different types of the drying equipment and the different types of the baking chamber.

Another drying apparatus control method is further provided in preferred embodiment 1 of the present invention, and specifically, fig. 4 shows an optional flowchart of the method, and as shown in fig. 4, the method includes the following steps S401 to S423:

s401: starting the dryer and stably operating for 1 h;

s402: the temperature T1 of the dry bulb of the baking chamber reaches the range of minus delta T1 to plus delta T1 of a set value T2 through frequency adjustment (the running frequency of a heat pump);

s403: judging whether the current wet bulb temperature T3-the set wet bulb temperature T4> delta T1 of the baking chamber is established or not;

s404: if not, detecting whether T3-T4 is located in the range from-delta T1 to + deltaT 1;

s405: if the parameter is within the range of-delta T1 to + deltaT 1, the original parameter operation is maintained;

s406: if the error is not within the range from-delta T1 to + deltaT 1, adjusting to the error range of the set value and continuing to operate;

s407: the current baking chamber wet bulb temperature T3-the set baking chamber wet bulb temperature T4> delta T1 is established, and the absolute moisture content zeta 1 of the baking chamber and the absolute moisture content zeta 2 of the outer ring fresh air are detected;

s408: judging the range of the difference value between zeta 1 and zeta 2;

s409: selecting the initial opening of the fresh air valve and the initial gear of the moisture exhaust fan by looking up a table, and then operating for 30 min;

s410: judging whether the current wet bulb temperature T3-the set wet bulb temperature T4> delta T1 of the baking chamber is established or not;

s411: if the air pressure is positive, adjusting the opening of a fresh air valve and the gear of a moisture exhaust fan;

s412: whether the opening of the fresh air valve is greater than 5 is established;

s413: if so, increasing the opening of the fresh air valve by 1;

s414: otherwise, the fresh air valve maintains the original opening degree unchanged; after the operation under the initial opening degree of the fresh air valve and the initial wind gear of the moisture removing fan, if the set humidity value is not met, the adjustment is needed. If the initial opening degree of the fresh air valve is larger than a first preset opening degree, for example, 5, the moisture content of the outer ring in the area is not large, the first gear can be increased upwards for further control, and otherwise, the original opening degree is maintained unchanged;

s415: whether the gear <3 of the moisture exhausting fan is established or not;

s416: if yes, increasing the gear of the moisture exhausting fan by 1;

s417: otherwise, increasing the gear of the moisture exhausting fan by 2; if the initial wind gear of the moisture exhausting fan is smaller than a first preset gear, for example, 3 gears, a second preset gear, for example, 1 gear, is increased for increasing the moisture exhausting, and if the initial wind gear of the moisture exhausting fan is larger than 3 gears, a third preset gear, for example, 2 gears, is increased, which is also the accurate control for distinguishing the moisture content of the fresh air;

s418: after the opening of the fresh air valve and the gear of the moisture exhaust fan are adjusted, the dryer is controlled to stably operate for 30 min;

s419: judging whether the current wet bulb temperature T3-the set wet bulb temperature T4> delta T1 of the baking chamber is established or not; if yes, returning to the step S411;

s420: if not, detecting whether the dry bulb temperature T1-T2 is within the range of-delta T1 to + deltaT 1;

s421: if so, maintaining the operation of the original parameters;

s422: otherwise, carrying out frequency adjustment according to the parameters in the table 2, and then stably operating for 30 min;

s423: and re-detecting whether the dry bulb temperature T1-T2 is in the range of-delta T1 to + deltaT 1, if so, entering the step S421, and otherwise, returning to the step S422.

Above-mentioned control mode, after setting up the baking chamber dry bulb temperature, control the baking chamber wet bulb temperature, the combined application of hydrofuge fan and new blast gate has increased the variability of control. Aiming at the dehumidifying stage of 'yellowing stage', the time of the stage is about 60h, and the control logic is triggered when the set value is adjusted each time in the stage, so that the drying effect of the tobacco leaves in the dehumidifying stage is ensured.

Example 2

Based on the drying equipment control method provided in the embodiment 1, in a preferred embodiment 2 of the present invention, there is also provided a drying equipment control device, wherein the drying equipment includes a fresh air dehumidifying device, a baking device and a baking chamber, wherein the fresh air dehumidifying device has a fresh air inlet, and the fresh air inlet is provided with a fresh air valve; the baking chamber is provided with a moisture exhausting window, and the moisture exhausting window is provided with a moisture exhausting fan. Specifically, fig. 5 shows an alternative structural block diagram of the apparatus, and as shown in fig. 5, the apparatus includes:

the detection module 502 is used for detecting the wet bulb temperature of the baking chamber and adjusting the opening of the fresh air valve and the gear of the moisture exhaust fan according to the wet bulb temperature;

the judging module 504 is connected with the detecting module 502 and is used for judging whether the wet bulb temperature is within a preset wet bulb temperature range, and if so, detecting the dry bulb temperature of the baking chamber;

and the control module 506 is connected with the judging module 504 and is used for controlling the operation of the baking equipment according to the dry bulb temperature until the dry bulb temperature reaches the preset dry bulb temperature range.

In the above embodiment, the dehumidifying fan is provided at the dehumidifying window of the drying chamber of the drying device, and the opening degree of the fresh air valve and the gear of the dehumidifying fan are adjusted according to the wet bulb temperature. The size of the moisture discharging amount can be accurately adjusted through the moisture discharging fan, the corresponding moisture discharging fan control logic is arranged, proper adjustment is carried out according to requirements, the problem that the moisture discharging control is not intelligent enough in the prior art can be effectively solved, the situation that the moisture discharging requirement is large, rapid moisture discharging cannot be carried out, and the temperature of a dry wet bulb of a drying chamber is unstable during moisture discharging is avoided, so that the moisture discharging speed is effectively improved, and the temperature stability in the moisture discharging process is improved. Especially for the tobacco leaf baking, the baking effect is improved.

The detection module 502 includes: the first calculation submodule is used for calculating the difference value between the wet bulb temperature and the first preset temperature to serve as the wet bulb difference value; the detection submodule is used for detecting the absolute moisture content of the baking chamber and the absolute moisture content of the fresh air when the wet-bulb difference value is larger than a first preset difference value; the second calculation submodule is used for calculating the moisture content difference between the absolute moisture content of the baking chamber and the absolute moisture content of the fresh air; and the first adjusting submodule is used for adjusting the opening of the fresh air valve and the gear of the moisture exhaust fan according to the moisture content difference value.

The first regulation submodule includes: the judgment unit is used for judging the range of the interval where the moisture content difference value is located; the determining unit is used for determining the initial opening of the fresh air valve and the initial gear of the moisture exhausting fan according to the interval range; the corresponding relation table of the interval range of the moisture content difference, the initial opening degree of the fresh air valve and the initial gear of the moisture exhaust fan is preset; and the control unit is used for controlling the fresh air valve to operate for a first preset time according to the initial opening degree and controlling the dehumidifying fan to operate for the first preset time according to the initial gear. Further comprising: the detection unit is used for detecting the temperature of the wet bulb again and calculating a wet bulb difference value after controlling the dehumidifying fan to operate for a first preset time according to an initial gear; and the adjusting unit is used for adjusting the opening degree of the fresh air valve and the gear of the moisture exhaust fan when the wet bulb difference value is greater than a first preset difference value.

The adjusting unit includes: the fresh air valve adjusting subunit is used for adjusting the opening of the fresh air valve according to the initial opening; the moisture exhausting fan adjusting subunit is used for adjusting the gear of the moisture exhausting fan according to the initial gear; wherein, the subunit is adjusted to the new trend valve includes: when the initial opening degree is larger than the first preset opening degree, controlling the opening degree of the fresh air valve to increase by a second preset opening degree; otherwise, keeping the opening of the fresh air valve unchanged; the dehumidifying fan regulator subunit includes: when the initial gear is smaller than a first preset gear, controlling the gear of the moisture exhaust fan to increase a second preset gear; otherwise, controlling the gear of the moisture exhaust fan to increase a third preset gear; and the third preset gear is larger than the second preset gear.

The determining module 504 includes: the timing submodule is used for starting timing after the opening of the fresh air valve and the gear of the moisture exhaust fan are adjusted; and the re-detection submodule is used for re-detecting the wet bulb temperature after the timing time reaches a second preset time, and judging whether the wet bulb temperature is within a preset wet bulb temperature range.

The detection module 502 further includes: the judgment submodule is used for judging whether the wet bulb difference value is within a first preset difference value range or not when the wet bulb difference value is not larger than the first preset difference value; the first maintenance submodule is used for maintaining the current operation parameters of the baking equipment if the current operation parameters are the same as the current operation parameters; and the second adjusting submodule is used for adjusting the wet bulb difference value to the first preset difference value range if the wet bulb difference value is not within the first preset difference value range.

This device still includes: the dry bulb temperature detection module is used for detecting the dry bulb temperature before detecting the wet bulb temperature of the baking chamber, and controlling the baking equipment to operate according to the dry bulb temperature until the dry bulb temperature reaches a preset dry bulb temperature range; and the trigger module is used for triggering and detecting the wet bulb temperature of the baking chamber after the dry bulb temperature reaches the preset dry bulb temperature range.

The dry bulb temperature detection module includes: the third calculation submodule is used for calculating the difference value between the dry bulb temperature and the second preset temperature to serve as the dry bulb difference value; the second maintaining submodule is used for maintaining the current operation parameters of the baking equipment when the dry-bulb difference value meets a second preset difference value range; and the third adjusting submodule is used for adjusting the operating frequency of the baking equipment according to the dry ball difference value if the dry ball difference value does not meet the second preset difference value range.

The third regulation submodule includes: when the dry ball difference value is larger than a second preset difference value, controlling the running frequency to increase; the larger the dry-bulb difference value is, the larger the amplitude of the running frequency is until the running frequency reaches a preset maximum running frequency; when the dry-bulb difference value is smaller than a third preset difference value, controlling the running frequency to be reduced; wherein the third preset difference is smaller than the second preset difference; the larger the dry-bulb difference value is, the larger the reduction amplitude of the operation frequency is until the baking equipment is in standby operation.

With regard to the apparatus in the above embodiments, the specific manner in which each unit and each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.

Example 3

Based on the drying apparatus control device provided in the above embodiment 2, there is also provided in a preferred embodiment 3 of the present invention a drying apparatus including the drying apparatus control device as described above.

In the above embodiment, the dehumidifying fan is provided at the dehumidifying window of the drying chamber of the drying device, and the opening degree of the fresh air valve and the gear of the dehumidifying fan are adjusted according to the wet bulb temperature. The size of the moisture discharging amount can be accurately adjusted through the moisture discharging fan, the corresponding moisture discharging fan control logic is arranged, proper adjustment is carried out according to requirements, the problem that the moisture discharging control is not intelligent enough in the prior art can be effectively solved, the situation that the moisture discharging requirement is large, rapid moisture discharging cannot be carried out, and the temperature of a dry wet bulb of a drying chamber is unstable during moisture discharging is avoided, so that the moisture discharging speed is effectively improved, and the temperature stability in the moisture discharging process is improved. Especially for the tobacco leaf baking, the baking effect is improved.

Example 4

Based on the drying appliance control method provided in the above embodiment 1, there is also provided in a preferred embodiment 4 of the present invention a storage medium containing computer executable instructions for performing the drying appliance control method as described above when executed by a computer processor.

In the above embodiment, the dehumidifying fan is provided at the dehumidifying window of the drying chamber of the drying device, and the opening degree of the fresh air valve and the gear of the dehumidifying fan are adjusted according to the wet bulb temperature. The size of the moisture discharging amount can be accurately adjusted through the moisture discharging fan, the corresponding moisture discharging fan control logic is arranged, proper adjustment is carried out according to requirements, the problem that the moisture discharging control is not intelligent enough in the prior art can be effectively solved, the situation that the moisture discharging requirement is large, rapid moisture discharging cannot be carried out, and the temperature of a dry wet bulb of a drying chamber is unstable during moisture discharging is avoided, so that the moisture discharging speed is effectively improved, and the temperature stability in the moisture discharging process is improved. Especially for the tobacco leaf baking, the baking effect is improved.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.