CN113834311A - Dehumidification device in small experimental curing barn and control method thereof - Google Patents
Dehumidification device in small experimental curing barn and control method thereof Download PDFInfo
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- CN113834311A CN113834311A CN202111098777.2A CN202111098777A CN113834311A CN 113834311 A CN113834311 A CN 113834311A CN 202111098777 A CN202111098777 A CN 202111098777A CN 113834311 A CN113834311 A CN 113834311A
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 41
- 241000208125 Nicotiana Species 0.000 claims abstract description 33
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims description 55
- 230000008569 process Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/22—Tobacco leaves
Abstract
The invention discloses a dehumidification device in a small test curing barn and a control method thereof, wherein the dehumidification device comprises the following steps: the small curing barn comprises a tobacco holding chamber, a heating chamber, a partition plate, an air return inlet, an air inlet, a circulating fan, a dry bulb thermometer and a wet bulb thermometer; the heat pump unit comprises a heat exchanger, a dehumidification evaporator and a condenser, wherein the dehumidification evaporator is arranged close to the air return opening; the internal dehumidifying device comprises a hot air exhaust valve and an electric shutter, the electric shutter is arranged on the wall of the heating chamber and is positioned above the circulating fan, and the hot air exhaust valve is arranged on the wall of the heating chamber and is close to the air inlet; and a controller. According to the invention, the electric shutter and the hot air exhaust valve are started when the heat pump unit is in a dehumidification working condition, and a small-range exhaust route in the heat pump unit is formed through linkage of fresh air intake, so that heat generated by the condenser is timely exhausted outwards through the hot air exhaust valve, heat entering the tobacco containing chamber is reduced, the baking temperature in the tobacco containing chamber is more stable, and the tobacco baking quality is improved.
Description
Technical Field
The invention relates to a dehumidification device in a small test curing barn and a control method thereof, belonging to the technical field of curing barn dehumidification.
Background
The current mature heat pump technology is widely used for tobacco leaf baking, mainly in a test small baking room, and has the advantages of no pollution, high energy efficiency, accurate temperature control and the like. The heat pump system mainly comprises a compressor, a heat exchanger, a dehumidifying evaporator, a condenser, an axial flow fan, a liquid storage tank, a filter, an electronic expansion valve, a controller and the like. After the power supply is switched on, the heat exchange fan starts to operate, outdoor air carries out heat exchange through the heat exchanger, the air with the reduced temperature is exhausted out of the system through the fan, meanwhile, working medium inside the heat exchanger absorbs heat and is vaporized and sucked into the compressor, the compressor compresses the low-pressure working medium gas into high-temperature and high-pressure gas, the high-temperature and high-pressure gas is sent into the condenser, the high-temperature and high-pressure gas is sent into the smoke containing chamber after being heated by the working medium, the working medium is cooled into liquid, the liquid flows into the heat exchanger again after being throttled and cooled by the expansion valve, the circulation work is repeated, and heat energy in the air is continuously sent into the curing barn for heating.
However, due to the complex baking process of the tobacco leaves, the requirements on temperature and humidity are relatively high, the temperature is controlled accurately and floats greatly under the working condition of dehumidification in an opening and closing all-in-one machine or a closed heat pump system, especially on a small experimental baking room, the tobacco loading volume is small, the change pointer is particularly obvious, the temperature control accuracy cannot meet the requirements, and the temperature-stabilizing moisture removal cannot be realized.
Disclosure of Invention
Based on the above, the invention provides the dehumidification device in the small experimental barn and the control method thereof, which can accurately control the temperature in the tobacco loading chamber of the heat pump system under the dehumidification working condition so as to overcome the defects of the prior art.
The technical scheme of the invention is as follows: a dehumidification device in a test barn, comprising:
the small curing barn comprises a tobacco loading chamber and a heating chamber, wherein a partition plate is arranged between the tobacco loading chamber and the heating chamber, the upper side and the lower side of the partition plate are respectively provided with an air return opening and an air inlet, a circulating fan is arranged in the heating chamber, and a dry bulb thermometer and a wet bulb thermometer are arranged in the tobacco loading chamber;
the heat pump unit is arranged in the heating chamber and comprises a heat exchanger, a dehumidification evaporator and a condenser, the dehumidification evaporator is arranged close to the air return opening, and the heat exchanger is arranged on the inner wall of the heating chamber between the dehumidification evaporator and the condenser and communicated with the external environment through a heat exchange fan arranged on the wall of the heating chamber;
the internal dehumidifying device comprises a hot air exhaust valve and an electric shutter, the electric shutter is arranged on the wall of the heating chamber and is positioned above the circulating fan, and the hot air exhaust valve is arranged on the wall of the heating chamber and is close to the air inlet;
and the controller is electrically connected with the dry bulb thermometer, the wet bulb thermometer, the heat pump unit, the heat exhaust valve and the electric shutter.
Optionally, the number of the heat exhausting valves is two, and the two heat exhausting valves are respectively arranged on two opposite walls of the heating chamber.
The invention also provides a control method of the dehumidification device in the test small flue-curing barn.
Optionally, in the baking process of the small baking room, when the wet bulb temperature of the baking room is greater than or equal to the wet bulb target temperature + [ dehumidification start-up deviation ], an internal dehumidification operation mode is entered, and the operation of the heat pump unit is not affected by the dry bulb temperature.
Optionally, the operation mode of the heat exhausting valve includes a manual mode and an automatic mode.
Optionally, the manual mode is manually set by 7 gears, which are respectively 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and off.
Optionally, the control manner of the automatic mode is as follows:
(1) when the temperature of the dry balls in the small curing barn is more than the target dry ball temperature + (the deviation of the heat extraction dry ball starting), controlling the hot air exhaust valve to be fully opened;
(2) when the temperature of the dry balls in the small curing barn is less than the target dry ball temperature (deviation under starting of the heat extraction dry balls), controlling the heat extraction air valve to be fully closed;
(3) when the temperature of the dry ball is between the temperature difference, the on-time duty ratio of the exhaust hot air valve is adjusted according to the temperature deviation condition, the opening angle of the exhaust hot air valve is automatically adjusted by the controller, and the heat exhaust speed is effectively adjusted until the exhaust hot air valve is closed.
Optionally, when the current dry bulb temperature-target dry bulb temperature is greater than or equal to (deviation on heat extraction starting), the heat extraction air valve is opened to 15 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.1 ℃, and the heat extraction air valve is opened to 30 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.2 ℃, and the heat extraction air valve is opened to 45 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.3 ℃, and the heat extraction air valve is opened to 60 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.4 ℃, and the heat extraction air valve is opened to 75 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.5 ℃, and the heat extraction air valve is opened to 90 ℃;
when the target dry bulb temperature-the current dry bulb temperature is not less than (deviation under heat extraction starting), closing the heat extraction air valve;
the adjusting period of the hot air exhaust valve is 12S.
Through research discovery, current experimental little roast room is in under the dehumidification operating mode at heat pump set, and the great reason of its dress cigarette indoor temperature fluctuation is that, the heat that the condenser produced under the dehumidification operating mode can enter into in the dress cigarette room, because the volume of experimental little roast room is little, consequently can increase substantially dress cigarette indoor temperature to can't accomplish steady temperature dehumidification.
The invention has the beneficial effects that: according to the invention, the exhaust air valves are arranged on two sides of the air inlet in the heating chamber, the electric shutter is arranged above the circulating fan, the electric shutter and the exhaust air valves are started when the heat pump unit is in a dehumidification working condition, and a small-range exhaust route in the heat pump unit is formed through linkage of fresh air inlet, so that heat generated by the condenser is timely discharged outwards through the exhaust air valves, the heat entering the tobacco containing chamber is reduced, the baking temperature in the tobacco containing chamber is more stable, and the baking quality of tobacco leaves is improved.
Preferably, the temperature inside the oven is monitored by combining the original temperature and humidity detection device and other components in the baking room, the control precision is greatly improved by temperature comparison and automatic adjustment control in the baking room, the temperature stabilization and moisture removal are realized, and the temperature stabilization control precision can be within +/-1 ℃ and far lower than the current +/-3 ℃.
Drawings
FIG. 1 is a schematic view of a dehumidifier in a test barn from a perspective;
FIG. 2 is a schematic view of the dehumidification device in a test barn from another view angle;
FIG. 3 is a schematic view of the interior of the removal heating chamber;
FIG. 4 is a side view of the removal heating chamber;
FIG. 5 is a schematic view of the structure of the smoke chamber and the partition;
description of reference numerals:
1 smoke containing chamber, 2 heating chamber, 3 baffle, 4 return air inlet, 5 air inlet, 6 circulating fan, 7 heat exchanger, 8 dehumidifying evaporator, 9 condenser, 10 heat exchange fan, 11 exhaust hot air valve, 12 electric shutter and 13 controller.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1 to 5, the experimental small flue-curing barn interior dehumidifying apparatus of the present embodiment includes a small flue-curing barn, a heat pump unit, an interior dehumidifying apparatus, and a controller 13.
The small flue-curing barn comprises a tobacco holding chamber 1 and a heating chamber 2, a partition plate 3 is arranged between the tobacco holding chamber 1 and the heating chamber 2, an air return opening 4 and an air inlet 5 are respectively arranged on the upper side and the lower side of the partition plate 3, a circulating fan 6 is arranged in the heating chamber 2, and a dry bulb thermometer and a wet bulb thermometer are arranged in the tobacco holding chamber 1 and are respectively used for obtaining the dry bulb temperature and the wet bulb temperature. The circulating fan 6 is mainly used for guiding air at the return air inlet 4 side in the heating chamber 2 to the air inlet 5 side. In this embodiment, the heating chamber 2 is closed.
The heat pump unit is installed in heating chamber 2, including heat exchanger 7, dehumidification evaporimeter 8 and condenser 9, dehumidification evaporimeter 8 is close to return air inlet 4 and sets up, and heat exchanger 7 sets up on the inner wall of heating chamber 2 between dehumidification evaporimeter 8 and condenser 9 to through setting up in heating chamber 2 wall heat transfer fan 10 and external environment intercommunication. In the heating mode, the heat exchange fan 10 is started, the outside air is in contact with the heat exchanger 7 for heat exchange, the working medium in the heat exchanger 7 absorbs heat and vaporizes and is sucked into the compressor, the compressor compresses the low-pressure working medium gas into high-temperature and high-pressure gas and sends the high-temperature and high-pressure gas into the condenser 9, the high-temperature and high-pressure gas is heated by the working medium and then is sent into the smoke containing chamber 1 by the circulating fan 6 through the air inlet 5, the working medium is cooled into liquid, the liquid is throttled by the expansion valve for cooling and then flows into the heat exchanger 7 again, and the circulation work is repeated. In the dehumidification mode, the heat exchanger 7 stops working, the dehumidification evaporator 8 and the condenser 9 start working, air from the return air inlet 4 is subjected to dehumidification treatment through the dehumidification evaporator 8, and liquid generated by dehumidification is led out of the heating chamber 2 through a pipeline.
The internal dehumidifying device comprises a hot air exhaust valve 11 and an electric shutter 12, wherein the electric shutter 12 is installed on the wall of the heating chamber 2 and is positioned above the circulating fan 6, and the hot air exhaust valve 11 is installed on the wall of the heating chamber 2 and is close to the air inlet 5. In this embodiment, two hot air exhaust valves 11 are respectively installed on two opposite walls of the heating chamber 2.
And the controller 13 is electrically connected with the dry bulb thermometer, the wet bulb thermometer, the heat pump unit, the hot air exhaust valve 11 and the electric shutter 12. The temperature values detected by the dry bulb thermometer and the wet bulb thermometer can be transmitted to the controller 13, the controller 13 can control the actions of the heat pump unit, the hot air exhaust valve 11 and the electric shutter 12, and meanwhile, the controller 13 can detect the operation mode of the heat pump unit. In this embodiment, the controller 13 may be a main control unit of the small curing barn itself, and is usually a single chip microcomputer.
The invention also provides a control method for the dehumidification device in the test small flue-curing barn, when the heat pump unit is in a dehumidification working condition, the device enters an internal dehumidification operation mode, the controller 13 controls the hot air exhaust valve 11 and the electric shutter 12 to be opened, a small-range exhaust route in the heat pump unit is formed through linkage of fresh air intake, so that heat generated by the condenser 9 is exhausted outwards through the hot air exhaust valve 11, heat generated by the condenser 9 in the dehumidification working condition can be exhausted out of the heating chamber 2, influence on the baking temperature in the tobacco loading chamber 1 caused by the fact that the heat enters the tobacco loading chamber 1 through the air inlet 5 is reduced, the baking temperature in the tobacco loading chamber 1 is enabled to be more stable, the baking quality of tobacco leaves is improved, and the baking problem caused by temperature overshoot (over 3 ℃ in general conditions) is effectively avoided.
Optionally, in the baking process of the small baking room, when the wet bulb temperature of the baking room is greater than or equal to the wet bulb target temperature + [ dehumidification start-up deviation ], an internal dehumidification operation mode is entered, and the operation of the heat pump unit is not affected by the dry bulb temperature. That is, the device starts the heat exhausting air valve 11 and the electric shutter 12. It should be noted that the hot air exhaust valve 11 is opened only when the curing barn is in the dehumidification condition, and the rest is in the closed state. The wet bulb target temperature is the set current temperature in the tobacco leaf baking process, the wet bulb target temperature is different in different baking stages, the deviation on dehumidification starting refers to the set temperature deviation of the set device in the internal dehumidification operation mode, only when the wet bulb temperature of the baking room is greater than the sum of the wet bulb target temperature and the deviation on dehumidification starting, the device enters the internal dehumidification operation mode, the heat loss caused by the fact that the device immediately enters the internal dehumidification operation mode under the dehumidification working condition of a small baking room can be avoided, and the problem that the temperature of the tobacco containing room 1 is reduced and the baking target temperature is not matched is caused.
Alternatively, the operation mode of the hot blast exhaust valve 11 includes a manual mode and an automatic mode. In the manual mode, the opening angle of the heat exhausting valve 11 can be directly controlled. In the automatic mode, the opening angle of the heat exhausting blast valve 11 is controlled by the controller 13 according to a preset command.
Optionally, the manual mode is manually set by 7 gears, which are respectively 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and off.
Optionally, the control mode of the automatic mode is as follows: (1) when the temperature of the dry balls in the small curing barn is more than the target dry ball temperature + (the deviation of the starting of the heat extraction dry balls), controlling the heat extraction air valve 11 to be fully opened; (2) when the temperature of the dry balls in the small curing barn is less than the target dry ball temperature (deviation under starting of the heat extraction dry balls), controlling the heat extraction air valve 11 to be fully closed; (3) when the temperature of the dry bulb is between the temperature difference, that is, between (1) and (2), the duty ratio of the conduction time of the heat exhaust air valve 11 is adjusted according to the temperature deviation condition, and the controller 13 automatically adjusts the opening angle of the heat exhaust air valve 11, so that the heat exhaust speed is effectively adjusted until the heat exhaust air valve is closed. In this embodiment, the deviation of the heat removal dry bulb from the start-up and the deviation of the heat removal dry bulb from the start-up are set values of the heat removal air valve 11 for full opening and full closing.
Specifically, when the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat extraction starting ], the heat extraction air valve is opened for 11 to 15 degrees; the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.1 ℃, and the heat extraction air valve is opened for 11 to 30 ℃; the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.2 ℃, and the heat extraction air valve is opened for 11 to 45 ℃; the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.3 ℃, and the heat extraction air valve is opened for 11 to 60 ℃; the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.4 ℃, and the heat extraction air valve is opened for 11 to 75 ℃; the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.5 ℃, and the heat extraction air valve is opened for 11 to 90 degrees; when the target dry bulb temperature-the current dry bulb temperature is not less than (deviation under heat extraction starting), closing the heat extraction air valve 11; the adjustment period of the heat exhaust valve 11 is 12S. According to the invention, the opening angle of the heat exhaust air valve 11 is adjusted according to the actual change of the temperature difference, so that the heat exhaust rate can be correspondingly adjusted, the dry bulb temperature in the tobacco loading chamber 1 is more matched with the target temperature, and the baking quality can be improved. The electric blind 12 of the present invention has only two states of closed and fully open.
The baking test is carried out on the test small baking room before and after modification, the baked tobacco leaves are the same, the tobacco loading amount and the tobacco loading mode are the same, the baking process is the same, the exhaust air valve 11 of the modified test small baking room is controlled according to the automatic mode, and partial temperature and humidity test data in the baking process are as follows:
TABLE 1 baking test data for unopened hot air exhaust valve
TABLE 2 baking test data by opening the exhaust hot blast valve
Through the comparison of the baking data of the two times, it can be seen that the overshoot of the temperature of the dry balls under the internal dehumidification working condition has an obvious inhibition effect by adding the heat extraction device.
According to the invention, the exhaust air valves 11 are arranged on two sides of the air inlet in the heating chamber 2, the electric shutter 12 is arranged above the circulating fan 6, the electric shutter 12 and the exhaust air valves 11 are started under the dehumidification working condition of the heat pump unit, a small-range exhaust route in the heat pump unit is formed through linkage of fresh air inlet, so that heat generated by the condenser 9 is timely discharged outwards through the exhaust air valves 11, the heat entering the tobacco loading chamber 1 is reduced, the baking temperature in the tobacco loading chamber 1 is more stable, and the baking quality of tobacco leaves is improved. The control of the temperature inside the oven is realized by combining the original components such as the temperature and humidity detection device in the baking room, the control precision is greatly improved by temperature comparison and automatic adjustment control in the baking room, the temperature stabilization and humidity elimination are realized, and the temperature stabilization control precision can be within +/-1 ℃.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The utility model provides a dehydrating unit in experimental little roast room which characterized in that includes:
the small curing barn comprises a tobacco containing chamber (1) and a heating chamber (2), wherein a partition plate (3) is arranged between the tobacco containing chamber (1) and the heating chamber (2), the upper side and the lower side of the partition plate (3) are respectively provided with an air return opening (4) and an air inlet (5), a circulating fan (6) is arranged in the heating chamber (2), and a dry bulb thermometer and a wet bulb thermometer are arranged in the tobacco containing chamber (1);
the heat pump unit is arranged in the heating chamber (2) and comprises a heat exchanger (7), a dehumidification evaporator (8) and a condenser (9), the dehumidification evaporator (8) is arranged close to the air return opening (4), the heat exchanger (7) is arranged on the inner wall of the heating chamber (2) between the dehumidification evaporator (8) and the condenser (9) and is communicated with the external environment through a heat exchange fan (10) arranged on the wall of the heating chamber (2);
the internal dehumidifying device comprises a heat exhaust air valve (11) and an electric shutter (12), the electric shutter (12) is arranged on the wall of the heating chamber (2) and is positioned above the circulating fan (6), and the heat exhaust air valve (11) is arranged on the wall of the heating chamber (2) and is close to the air inlet (5);
the controller (13), controller (13) with dry bulb thermometer, wet bulb thermometer, heat pump set, heat extraction air valve (11) and electronic shutter (12) electrical connection.
2. The dehumidification apparatus for laboratory use according to claim 1, wherein said two heat-exhausting valves (11) are respectively disposed on two opposite walls of said heating chamber (2).
3. The control method of the dehumidification device in the test barn according to claim 1 or 2, wherein when the heat pump unit is in the dehumidification mode, the device enters an internal dehumidification operation mode, and the controller (13) controls the hot air exhaust valve (11) and the electric shutter (12) to be opened, so that the heat generated by the condenser (9) is exhausted outwards through the hot air exhaust valve (11).
4. The control method for the dehumidification device in the small test curing barn according to the claim 3, wherein in the curing process of the small curing barn, when the wet bulb temperature of the curing barn is more than or equal to the wet bulb target temperature + [ dehumidification start-up deviation ], an internal dehumidification operation mode is entered, and the operation of the heat pump unit is not affected by the dry bulb temperature.
5. Method for controlling a dehumidifying device in a test barn according to claim 3, wherein the operation mode of the heat exhausting valve (11) includes a manual mode and an automatic mode.
6. The control method of the dehumidification device in the test barn according to claim 5, wherein the manual mode is manually set in 7 gears, namely 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and off.
7. The method for controlling the dehumidifying device in the test barn according to claim 5, wherein the automatic mode is controlled by:
(1) when the temperature of the dry balls in the small curing barn is more than the target dry ball temperature + (the deviation of the starting of the heat extraction dry balls), controlling the heat extraction air valve (11) to be fully opened;
(2) when the temperature of the dry balls in the small curing barn is less than the target dry ball temperature (deviation under starting of the heat extraction dry balls), controlling the heat extraction air valve (11) to be fully closed;
(3) when the temperature of the dry bulb is between the temperature difference, the on-time duty ratio of the heat exhaust air valve (11) is adjusted according to the temperature deviation condition, the opening angle of the heat exhaust air valve (11) is automatically adjusted by the controller (13), and the heat exhaust speed is effectively adjusted until the heat exhaust air valve is closed.
8. The method for controlling a dehumidifying unit in a test barn according to claim 7,
when the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on heat extraction starting), the heat extraction air valve (11) is opened to 15 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on heat extraction starting) plus 0.1 ℃, and the heat extraction air valve (11) is opened to 30 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.2 ℃, and the heat extraction air valve (11) is opened to 45 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on starting of heat extraction) plus 0.3 ℃, and the heat extraction air valve (11-60 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on heat extraction starting) plus 0.4 ℃, and the heat extraction air valve (11) is opened to 75 ℃;
the current dry bulb temperature-target dry bulb temperature is more than or equal to (deviation on heat extraction starting) plus 0.5 ℃, and the heat extraction air valve (11) is opened to 90 ℃;
when the target dry bulb temperature-the current dry bulb temperature is not less than (deviation under heat extraction starting), closing the heat extraction air valve (11);
the regulation period of the heat exhaust air valve (11) is 12S.
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| CN212139278U (en) * | 2020-03-05 | 2020-12-15 | 中国农业科学院烟草研究所 | Split type closed circulation heat pump tobacco flue-curing barn |
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2021
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| KR20070018545A (en) * | 2005-08-10 | 2007-02-14 | 이순규 | Drying apparatus |
| CN202002440U (en) * | 2011-02-22 | 2011-10-05 | 成都东和工业有限责任公司 | Hot-water heating and baking device for condensing and dehumidifying |
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| CN107202475A (en) * | 2017-07-03 | 2017-09-26 | 刘贵平 | A kind of air source heat pump drying system |
| CN212139278U (en) * | 2020-03-05 | 2020-12-15 | 中国农业科学院烟草研究所 | Split type closed circulation heat pump tobacco flue-curing barn |
| CN111829303A (en) * | 2020-07-13 | 2020-10-27 | 广州热之源科技有限公司 | Heat pump tobacco baking system and control method thereof |
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