阅读说明：本技术 烤房干湿球温度控制方法及烤房干湿球温度控制系统 (Curing barn dry-wet ball temperature control method and curing barn dry-wet ball temperature control system ) 是由 何志斌 陈阿勇 黄运松 王林 毛洪炎 于 2019-10-22 设计创作，主要内容包括：一种烤房干湿球温度控制方法及烤房干湿球温度控制系统,涉及烟草加工领域。烤房干湿球温度控制系统包括烤房、热泵机组及控制器；烤房内设有干球温度传感器及湿球温度传感器,以实时获得实测干球温度T以及实测湿球温度Ts；热泵机组包括制冷剂循环回路以及风机,制冷剂循环回路包括第一制冷剂循环回路、第二制冷剂循环回路以及第三制冷剂循环回路；控制器分别与干球温度传感器、湿球温度传感器第一制冷剂循环回路、第二制冷剂循环回路、第三制冷剂循环回路,以及风机电连接；在烤房干湿球温度调控过程采用本申请提供的控制方法进行实施。不仅有效调控烤房干湿球温度,同时保证烤房干湿球温度的变化幅度小,保证烘干的稳定性,还可以有效节能。(A curing barn dry-wet bulb temperature control method and a curing barn dry-wet bulb temperature control system relate to the field of tobacco processing. The curing barn dry-wet ball temperature control system comprises a curing barn, a heat pump unit and a controller; a dry bulb temperature sensor and a wet bulb temperature sensor are arranged in the curing barn to obtain an actually measured dry bulb temperature T and an actually measured wet bulb temperature Ts in real time; the heat pump unit comprises a refrigerant circulating loop and a fan, wherein the refrigerant circulating loop comprises a first refrigerant circulating loop, a second refrigerant circulating loop and a third refrigerant circulating loop; the controller is respectively electrically connected with the dry bulb temperature sensor, the wet bulb temperature sensor, the first refrigerant circulating loop, the second refrigerant circulating loop, the third refrigerant circulating loop and the fan; the control method provided by the application is adopted to implement the process of regulating and controlling the dry-wet bulb temperature of the curing barn. Not only effectively regulate and control roast room wet-dry bulb temperature, guarantee simultaneously that roast room wet-dry bulb temperature's variation range is little, guarantee the stability of drying, can also effectively save energy.)

1. The utility model provides a roast room wet-and-dry bulb temperature control method, roast room adopts heat pump set to dry, heat pump set includes refrigerant circulation circuit, and set up in the fan of heat pump set's air outlet, refrigerant circulation circuit includes first refrigerant circulation circuit, second refrigerant circulation circuit and third refrigerant circulation circuit, its characterized in that, roast room wet-and-dry bulb temperature control method includes:

s1, obtaining the actually measured dry bulb temperature T and the actually measured wet bulb temperature Ts in the curing barn in real time;

s2, in a preset monitoring time period, when the actually measured dry bulb temperature T is deviated from the target dry bulb temperature T1set and the actually measured wet bulb temperature Ts is deviated from the target wet bulb temperature T2set, executing a step S3;

step S3 includes step S31, which step S31 includes: performing a closed circulation mode when there is no operational obstacle in the refrigerant circulation circuit;

the closed circulation mode includes: and in the closed baking room, controlling a refrigerant circulation loop of the heat pump unit to operate according to the numerical relationship between the sum and difference of the target dry bulb temperature T1set and the dry bulb deviation value T1d and the actually measured dry bulb temperature T, and the numerical relationship between the sum and difference of the target wet bulb temperature T2set and the wet bulb deviation value T2d and the actually measured wet bulb temperature Ts, so as to adjust the actually measured dry bulb temperature T and the actually measured wet bulb temperature Ts.

2. The method as claimed in claim 1, wherein the step S31 includes a step S311, and the step S311 includes: when T is less than or equal to T1set-T1d and Ts is less than T2set + T2d, executing a closed heating mode and continuing to execute the step 1; wherein the closed heating mode includes operating a first refrigerant circulation loop and the fan to transfer ambient heat to the interior of the curing barn to increase the measured dry bulb temperature;

optionally, step S31 includes step S312, and step S312 includes: when T is more than T1set-T1d and Ts is less than or equal to T2set-T2d, executing an energy-saving mode and continuing to execute the step 1; wherein the energy-saving mode comprises only operating the fan to make the air in the curing barn perform closed circulation.

3. The method as claimed in claim 1, wherein the step S31 includes a step S313, and the step S313 includes: when T is less than or equal to T1set-T1d and Ts is more than or equal to T2set + T2d, executing a closed heating and dehumidifying mode and continuing to execute the step 1; the closed heating and dehumidifying mode comprises a second refrigerant circulation loop and the fan, wherein the second refrigerant circulation loop and the fan are operated and used for condensing wet air in the baking room into liquid water and discharging the liquid water to the outside so as to reduce the actual measurement temperature of wet balls, and heat converted from two phases of the wet air is provided for the baking room so as to improve the actual measurement temperature of the dry balls;

alternatively, step S31 includes step S314, and step S314 includes: when T is more than T1set-T1d and Ts is more than T2set-T2d, or T is more than or equal to T1set + T1d and T2set-T2d < Ts < T2set + T2d, executing a closed cooling and dehumidifying mode, and continuing to execute the step 1, wherein the closed cooling and dehumidifying mode comprises operating a third refrigerant circulating loop and the fan, and is used for condensing the humid air in the baking room into liquid water to be discharged to the outside so as to reduce the wet bulb temperature of the baking room, and discharging the heat of two-phase conversion of the humid air to the atmosphere so as to reduce the dry bulb temperature.

4. The method for controlling the wet and dry bulb temperature of the curing barn according to any one of claims 1-3, wherein the curing barn is further dried by an auxiliary heating device;

the step S3 includes S32, and the step S32 includes: when the operation of the refrigerant circulation circuit is obstructed, the refrigerant circulation circuit is closed, and the actually measured dry bulb temperature T and the actually measured wet bulb temperature Ts are adjusted through self circulation of air in the baking room, exchange of air and atmosphere in the baking room or heating of an auxiliary heating mechanism according to the numerical relationship between the sum and difference of the target dry bulb temperature T1set and the dry bulb deviation value T1d and the actually measured dry bulb temperature T and the numerical relationship between the sum and difference of the target wet bulb temperature T2set and the wet bulb deviation value T2d and the actually measured wet bulb temperature Ts.

5. The method as claimed in claim 4, wherein the step S32 includes a step S321, and the step S321 includes: when T is less than or equal to T1set-T1d and Ts is less than T2set + T2d, executing a forced heating mode and continuing to execute the step 1; the forced heating mode comprises an auxiliary heating device and the fan, and is used for circulating the air heated by the auxiliary heater in the curing barn;

alternatively, step S32 includes step S322, and step S322 includes: when T is more than T1set-T1d and Ts is less than or equal to T2set-T2d, executing an energy-saving mode and continuing to execute the step 1; the energy-saving mode is that only the fan operates to enable the air in the curing barn to carry out closed circulation.

6. The method for controlling wet and dry bulb temperature of flue-curing barn according to claim 4, wherein the step S32 comprises a step S323, and the step S323 comprises: when T is less than or equal to T1set-T1d and Ts is more than or equal to T2set + T2d, executing an open type heating and dehumidifying mode, and continuing to execute the step 1; the open heating and dehumidifying mode comprises a fan and an auxiliary heater, and is used for inputting the air heated by the auxiliary heater into the baking room and discharging the humid air in the baking room out of the room;

alternatively, step S32 includes step S324, and step S324 includes: when T is more than T1set-T1d and Ts is more than T2set-T2d, or T is more than or equal to T1set + T1d and T2set-T2d is more than Ts and less than T2set + T2d, executing an open cooling and dehumidifying mode and continuing to execute the step 1; the open cooling and dehumidifying mode comprises an operating fan, and is used for inputting outdoor air into the baking room and discharging the humid air in the baking room outdoors.

7. The method for controlling dry and wet bulb temperature in flue-curing barn according to any one of claims 1-3, further comprising step S5 performed after step S1, wherein step S5 comprises: and when the deviation does not exist between the actually measured dry bulb temperature T and the target dry bulb temperature T1set and the deviation does not exist between the actually measured wet bulb temperature Ts and the target wet bulb temperature T2set, executing an energy-saving mode, and continuing to execute the step 1, wherein the energy-saving mode comprises the operation of only the fan so as to enable the air in the curing barn to carry out closed circulation.

8. A drying and wetting ball temperature control system of a curing barn is characterized by comprising the curing barn, a heat pump unit for drying the curing barn and a controller;

a dry bulb temperature sensor and a wet bulb temperature sensor are arranged in the curing barn to respectively obtain an actually measured dry bulb temperature T and an actually measured wet bulb temperature Ts in real time;

the heat pump unit comprises a refrigerant circulation loop and a fan arranged at an air outlet of the heat pump unit, wherein the refrigerant circulation loop comprises a first refrigerant circulation loop, a second refrigerant circulation loop and a third refrigerant circulation loop;

the controller is respectively electrically connected with the dry bulb temperature sensor, the wet bulb temperature sensor, the first refrigerant circulating loop, the second refrigerant circulating loop, the third refrigerant circulating loop and the fan;

the process of adjusting and controlling the dry-wet bulb temperature of the curing barn is implemented by using the control method as claimed in any one of claims 1 to 7.

9. The system of claim 8, wherein said control system comprises a heating chamber separated from said baking chamber by a retaining wall;

the retaining wall is provided with a first opening for conveying air from the heating chamber to the baking room and a second opening for conveying air from the baking room to the heating chamber, so that an air flow channel is formed between the baking room and the heating chamber, and the first opening is positioned above the second opening;

the heat pump unit is arranged in the heating chamber, and the air outlet of the fan is close to the first opening.

10. The curing barn dry-wet bulb temperature control system according to claim 9, wherein the heat pump unit comprises a compressor, a four-way valve, a first heat exchanger, a second heat exchanger, an expansion valve and a third heat exchanger;

the outlet of the compressor, the four-way valve, the first heat exchanger, the expansion valve, the second heat exchanger and the inlet of the compressor are sequentially connected through a refrigerant pipeline to form a closed first refrigerant circulating loop, the first heat exchanger is positioned on one side, close to the first opening, of the fan, and the second heat exchanger is positioned outside the heating chamber;

the outlet of the compressor, the four-way valve, the first heat exchanger, the expansion valve, the third heat exchanger and the inlet of the compressor are sequentially connected through a refrigerant pipeline to form a closed second refrigerant circulation loop, and the third heat exchanger is positioned on one side of the heat pump unit, which is close to the second opening;

the outlet of the compressor, the second heat exchanger, the expansion valve, the third heat exchanger, the four-way valve and the inlet of the compressor are sequentially connected through refrigerant pipelines to form a closed third refrigerant circulating loop.

Technical Field

The application relates to the field of tobacco processing, in particular to a drying and wetting ball temperature control method and a drying and wetting ball temperature control system for a curing barn.

Background

The tobacco has different requirements on the dry-wet-bulb temperature in different stages, and the heat pump unit is adopted to independently set a dehumidification mode and a heating mode to respectively control the wet-bulb temperature and the dry-bulb temperature.

The tobacco baking has corresponding requirements on dry bulb temperature and wet bulb temperature, the relationship between the dry bulb temperature and the wet bulb temperature is difficult to balance, heat waste is easy to cause, the fluctuation range of the dry bulb temperature and the wet bulb temperature in the baking room is large, and the baking quality of the tobacco is influenced.

Disclosure of Invention

The application provides a drying and wetting ball temperature control method and a drying and wetting ball temperature control system of a curing barn to improve the problems.

According to the method for controlling the temperature of the dry bulb and the wet bulb of the curing barn, the curing barn adopts a heat pump unit for drying, the heat pump unit comprises a refrigerant circulation loop and a fan arranged at an air outlet of the heat pump unit, the refrigerant circulation loop comprises a first refrigerant circulation loop, a second refrigerant circulation loop and a third refrigerant circulation loop, and the method for controlling the temperature of the dry bulb and the wet bulb of the curing barn comprises the following steps:

and S1, obtaining the actually measured dry bulb temperature T and the actually measured wet bulb temperature Ts in the baking room in real time.

And S2, in the preset monitoring time period, when the deviation exists between the measured dry bulb temperature T and the target dry bulb temperature T1set and the deviation exists between the measured wet bulb temperature Ts and the target wet bulb temperature T2set, executing a step S3.

Step S3 includes step S31, and step S31 includes: when there is no operational obstacle in the refrigerant circulation circuit, a closed circulation mode is performed.

The closed circulation mode includes: in a closed curing barn, according to the numerical relationship between the sum and difference between the target dry bulb temperature T1set and the dry bulb deviation value T1d and the measured dry bulb temperature T, and the numerical relationship between the sum and difference between the target wet bulb temperature T2set and the wet bulb deviation value T2d and the measured wet bulb temperature Ts, the operation of a refrigerant circulation loop of a heat pump unit is controlled so as to adjust the measured dry bulb temperature T and the measured wet bulb temperature Ts.

According to the method for controlling the dry-wet bulb temperature of the curing barn, the operation of the refrigerant circulating circuit is determined according to the relation of setting the dry-bulb deviation value t1d and the wet-bulb deviation value t2d, and the relation of the dry-wet bulb temperature is effectively balanced. The measured dry-wet bulb temperature T, Ts is compared with the target dry-wet bulb temperatures T1set and T2set respectively in the monitoring time period, the dry-wet bulb temperature is guaranteed to be in a reasonable range by setting the dry-wet bulb temperature deviation values T1d and T2d, the condition that the fluctuation range of the dry-wet bulb temperature is large and the baking quality of tobacco is influenced is prevented, and meanwhile, the step S3 is in a closed circulation mode, so that the waste of heat is effectively prevented.

In addition, the method for controlling the temperature of the dry and wet pellets in the curing barn according to the embodiment of the application has the following additional technical characteristics:

with reference to the first aspect, in some embodiments illustrated herein, the step S31 includes a step S311, and the step S311 includes: when T is less than or equal to T1set-T1d and Ts is less than T2set + T2d, executing a closed heating mode and continuing to execute the step 1; wherein the closed heating mode includes operating a first refrigerant circulation loop and a fan for transferring ambient heat to the interior of the curing barn to increase the measured dry bulb temperature.

Optionally, step S31 includes step S312, and step S312 includes: when T is more than T1set-T1d and Ts is less than or equal to T2set-T2d, executing an energy-saving mode and continuing to execute the step 1; wherein the energy-saving mode comprises only operating the fan to make the air in the curing barn perform closed circulation.

Alternatively, step S31 includes step S313, and step S313 includes: when T is less than or equal to T1set-T1d and Ts is more than or equal to T2set + T2d, executing a closed heating and dehumidifying mode and continuing to execute the step 1; the closed heating and dehumidifying mode comprises a second refrigerant circulating loop and a fan, wherein the second refrigerant circulating loop and the fan are used for condensing wet air in the baking room into liquid water and discharging the liquid water to the outside so as to reduce the actual measurement temperature of wet balls, and heat generated by two-phase conversion of the wet air is provided for the baking room so as to improve the actual measurement temperature of dry balls.

Alternatively, step S31 includes step S314, and step S314 includes: when T is more than T1set-T1d and Ts is more than T2set-T2d, or T is more than or equal to T1set + T1d and T2set-T2d is less than Ts and less than T2set + T2d, executing a closed cooling and dehumidifying mode, and continuing to execute the step 1, wherein the closed cooling and dehumidifying mode comprises operating a third refrigerant circulating loop and a fan, and is used for condensing the humid air in the baking room into liquid water to be discharged to the outside so as to reduce the wet bulb temperature of the baking room, and discharging the heat of two-phase conversion of the humid air to the atmosphere so as to reduce the dry bulb temperature.

In summary, when there is no operational failure in the refrigerant circuit, the closed circulation mode is performed in step S31; the energy-saving type dry bulb temperature control system comprises a control system, a control system and a control system, wherein the control system comprises a target dry bulb temperature T1set, a dry bulb deviation value T1d, a target wet bulb temperature T2set, a wet bulb deviation value T2d, a dry bulb temperature T, a wet bulb temperature T2set, a wet bulb deviation value T2d, a wet bulb temperature Ts, a dry bulb temperature T, a wet bulb temperature T, a dry bulb temperature T, a wet bulb temperature T2set, a dry bulb.

In connection with the first aspect, the present application illustrates that in some embodiments, the baking room further employs an auxiliary heating device for drying.

The auxiliary heating device is, for example, an electric heating wire.

Step S3 includes S32, and step S32 includes: when the operation of the refrigerant circulation circuit is obstructed, the refrigerant circulation circuit is closed, and the actually measured dry bulb temperature T and the actually measured wet bulb temperature Ts are adjusted through self circulation of air in the baking room, exchange of air and atmosphere in the baking room or heating of an auxiliary heating mechanism according to the numerical relationship between the sum and difference of the target dry bulb temperature T1set and the dry bulb deviation value T1d and the actually measured dry bulb temperature T and the numerical relationship between the sum and difference of the target wet bulb temperature T2set and the wet bulb deviation value T2d and the actually measured wet bulb temperature Ts.

By the arrangement mode, the temperature of the dry and wet balls in the curing barn can be ensured to be normal when the refrigerant circulation loop breaks down, and the normal operation of the temperature control of the dry and wet balls in the curing barn is ensured.

In combination with the first aspect, in some embodiments shown herein, step S32 includes step S321, and step S321 includes: when T is less than or equal to T1set-T1d and Ts is less than T2set + T2d, executing a forced heating mode and continuing to execute the step 1; the forced heating mode includes operating an auxiliary heating device and a fan for circulating the heated air through the auxiliary heater in the curing barn.

Alternatively, step S32 includes step S322, and step S322 includes: when T is more than T1set-T1d and Ts is less than or equal to T2set-T2d, executing an energy-saving mode and continuing to execute the step 1; the energy-saving mode is that only the fan operates to make the air in the curing barn perform closed circulation.

Alternatively, step S32 includes step S323, and step S323 includes: when T is less than or equal to T1set-T1d and Ts is more than or equal to T2set + T2d, executing an open type heating and dehumidifying mode, and continuing to execute the step 1; the open heating and dehumidifying mode includes operating a fan and an auxiliary heater for inputting heated air through the auxiliary heater into the curing barn and discharging humid air in the curing barn to the outside.

Alternatively, step S32 includes step S324, and step S324 includes: when T is more than T1set-T1d and Ts is more than T2set-T2d, or T is more than or equal to T1set + T1d and T2set-T2d is more than Ts and less than T2set + T2d, executing an open cooling and dehumidifying mode and continuing to execute the step 1; the open cooling and dehumidifying mode comprises an operating fan which is used for inputting outdoor air into the curing barn and discharging humid air in the curing barn outdoors.

In summary, according to the numerical relationship between the sum and difference between the target dry-bulb temperature T1set and the dry-bulb deviation value T1d and the measured dry-bulb temperature T, and the numerical relationship between the sum and difference between the target wet-bulb temperature T2set and the wet-bulb deviation value T2d and the measured wet-bulb temperature Ts, a forced heating mode, an energy saving mode, an open heating and dehumidifying mode, and an open cooling and dehumidifying mode can be adopted to effectively balance the requirements of the measured dry-bulb temperature and the measured wet-bulb temperature, and meanwhile, through the above relationships, the heating heat of the auxiliary heater is judged to be discharged into the baking room or the wet air and heat in the baking room are output to the atmosphere, and the dry-bulb temperature of the baking room can be reduced or increased according to the requirements while the wet-bulb temperature is reduced.

In some embodiments, the method further includes a step S5 performed after the step S1, and the step S5 includes: and when the deviation does not exist between the actually measured dry bulb temperature T and the target dry bulb temperature T1set and the deviation does not exist between the actually measured wet bulb temperature Ts and the target wet bulb temperature T2set, executing an energy-saving mode, and continuously executing the step 1, wherein the energy-saving mode comprises the operation of only a fan so as to enable the air in the curing barn to be in closed circulation. Effectively preventing energy waste and simultaneously ensuring the normal operation of the regulation and control method.

According to the roast room wet-dry bulb temperature control system of this application second aspect embodiment, it includes roast room, is used for drying the heat pump set of roast room, and the controller.

Wherein, be equipped with dry bulb temperature sensor and wet bulb temperature sensor in the roast room to obtain actual measurement dry bulb temperature T and actual measurement wet bulb temperature Ts in real time.

The heat pump unit comprises a refrigerant circulation loop and a fan arranged at an air outlet of the heat pump unit, wherein the refrigerant circulation loop comprises a first refrigerant circulation loop, a second refrigerant circulation loop and a third refrigerant circulation loop.

The controller is respectively electrically connected with the dry bulb temperature sensor, the wet bulb temperature sensor, the first refrigerant circulating loop, the second refrigerant circulating loop, the third refrigerant circulating loop and the fan.

The control method provided by the embodiment of the first aspect of the application is adopted to implement the dry-wet bulb temperature regulation process of the curing barn.

According to roast room wet-dry bulb temperature control system of this application embodiment, utilize control method as above to implement, not only effectively regulate and control roast room wet-dry bulb temperature, guarantee simultaneously that roast room wet-dry bulb temperature's variation range is little, guarantee the stability of drying, can also effectively energy-conservation.

In connection with the second aspect, the present application illustrates some embodiments in which the control system includes a heating chamber separated from the baking chamber by a retaining wall; the retaining wall is provided with a first opening for conveying air from the heating chamber to the baking chamber and a second opening for conveying air from the baking chamber to the heating chamber, so that an air flow channel is formed between the baking chamber and the heating chamber, and the first opening is positioned above the second opening; the heat pump unit is arranged in the heating chamber, and the air outlet of the fan is close to the first opening.

In combination with the second aspect, in some embodiments illustrated herein, a heat pump unit includes a compressor, a four-way valve, a first heat exchanger, a third heat exchanger, an expansion valve, and a third heat exchanger.

The outlet of the compressor, the four-way valve, the first heat exchanger, the expansion valve, the second heat exchanger and the inlet of the compressor are sequentially connected through a refrigerant pipeline to form a closed first refrigerant circulating loop, the first heat exchanger is located on one side, close to the first opening, of the fan, and the second heat exchanger is located outside the heating chamber.

The outlet of the compressor, the four-way valve, the first heat exchanger, the expansion valve, the third heat exchanger and the inlet of the compressor are sequentially connected through a refrigerant pipeline to form a closed second refrigerant circulation loop, and the third heat exchanger is positioned on one side, close to the second opening, of the heat pump unit.

The outlet of the compressor, the second heat exchanger, the expansion valve, the third heat exchanger, the four-way valve and the inlet of the compressor are sequentially connected through a refrigerant pipeline to form a closed third refrigerant circulating loop.

In other words, the heat pump unit provided by the application is integrated with three refrigerant circulation loops, the first refrigerant circulation loop, the second refrigerant circulation loop and the third refrigerant circulation loop can realize different modes through the arrangement positions of the first heat exchanger, the second heat exchanger and the third heat exchanger so as to regulate and control the temperature, and compared with three independent refrigerant circulation loops, the heat pump unit effectively reduces the cost and energy consumption.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a system for controlling the wet and dry bulb temperature of a curing barn according to the present invention;

FIG. 2 is a schematic flow chart of the method for controlling the wet and dry bulb temperature of the curing barn.

Icon: 10-a drying and wetting ball temperature control system of the curing barn; 100-baking room; 110-retaining wall; 111-a first opening; 113-a second opening; 120-heating chamber; 130-heat pump set; 131-a fan; 132-a compressor; 133-a four-way valve; 134-a first heat exchanger; 135-a second heat exchanger; 136-an expansion valve; 137-a third heat exchanger; 140-auxiliary heating means; 150-fresh air valve; 160-dehumidification valve.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It should be noted that the terms "first," "second," "third," and the like are used merely to distinguish one description from another, and are not intended to indicate or imply relative importance.

It should be noted that the dry-wet-bulb temperature in the present application generally refers to the measured dry-wet-bulb temperature T and the measured wet-bulb temperature Ts, unless otherwise specified.