CN113834311B - Dehumidification device in small test curing barn and control method thereof - Google Patents
Dehumidification device in small test curing barn and control method thereof Download PDFInfo
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- CN113834311B CN113834311B CN202111098777.2A CN202111098777A CN113834311B CN 113834311 B CN113834311 B CN 113834311B CN 202111098777 A CN202111098777 A CN 202111098777A CN 113834311 B CN113834311 B CN 113834311B
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 38
- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000005192 partition Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims description 7
- 241000208125 Nicotiana Species 0.000 abstract description 17
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract description 17
- 239000007788 liquid Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241000208134 Nicotiana rustica Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a dehumidifying device in a small test curing barn and a control method thereof, wherein the dehumidifying device comprises the following steps: the small curing barn comprises a tobacco accommodating chamber, a heating chamber, a partition board, an air return opening, an air inlet, a circulating fan, a dry bulb thermometer and a wet bulb thermometer; the heat pump unit comprises a heat exchanger, a dehumidifying evaporator and a condenser, wherein the dehumidifying evaporator is arranged close to the air return opening; the inner dehumidification device comprises a hot air exhaust valve and an electric shutter, the electric shutter is arranged on the wall of the heating chamber and above the circulating fan, and the hot air exhaust valve is arranged on the wall of the heating chamber and close to the air inlet; and a controller. According to the invention, the electric shutter and the heat exhaust air valve are started under the dehumidifying working condition of the heat pump unit, and the small-range exhaust route in the heat pump unit is formed through fresh air inlet linkage, so that the heat generated by the condenser is timely discharged outwards through the heat exhaust air valve, the heat entering the tobacco accommodating chamber is reduced, the baking temperature in the tobacco accommodating chamber is more stable, and the tobacco baking quality is improved.
Description
Technical Field
The invention relates to a dehumidifying device in a small test curing barn and a control method thereof, and belongs to the technical field of curing barn dehumidification.
Background
The mature heat pump technology is widely applied to tobacco leaf baking, mainly in a small test baking room, and has the multiple advantages of no pollution, high energy efficiency, wen Jingzhun 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 is subjected to heat exchange through the heat exchanger, air with reduced temperature is discharged out of the system through the fan, meanwhile, working medium in the heat exchanger absorbs heat and is vaporized to be sucked into the compressor, the compressor compresses the low-pressure working medium gas into high-temperature and high-pressure gas, the high-pressure gas is sent into the condenser, the high-temperature and high-pressure gas is heated by the working medium and then is sent into the smoke-accommodating chamber, 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 circulating operation is repeated, and heat energy in the air is continuously sent into the flue-curing barn for heating.
However, due to the complex baking process of tobacco leaves, the temperature and humidity requirements are relatively high, the temperature is accurately controlled to float greatly under the internal dehumidification working condition in the opening-closing type integrated machine or the closed type heat pump system, and particularly on a small test baking room, the change pointer is obvious due to small tobacco loading volume, the temperature control precision cannot meet the requirements, and the stable temperature and dehumidification cannot be realized.
Disclosure of Invention
Based on the above, the invention provides the dehumidification device in the small test flue-curing barn and the control method thereof, which can accurately control the temperature of the heat pump system in the tobacco loading chamber under the dehumidification working condition so as to overcome the defects in the prior art.
The technical scheme of the invention is as follows: a dehumidifying device in a laboratory, comprising:
the small flue-curing barn comprises a flue-curing chamber and a heating chamber, wherein a partition plate is arranged between the flue-curing chamber and the heating chamber, an air return opening and an air inlet are respectively arranged at the upper side and the lower side of the partition plate, a circulating fan is arranged in the heating chamber, and a dry bulb thermometer and a wet bulb thermometer are arranged in the flue-curing chamber;
the heat pump unit is arranged in the heating chamber and comprises a heat exchanger, a dehumidifying evaporator and a condenser, wherein the dehumidifying evaporator is arranged close to the return air inlet, and the heat exchanger is arranged on the inner wall of the heating chamber between the dehumidifying evaporator and the condenser and is communicated with the external environment through a heat exchange fan arranged on the wall of the heating chamber;
the inner dehumidifying device comprises a heat exhaust air 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 heat exhaust air 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 air valve and the electric shutter.
Optionally, the heat exhausting air valves are two and are respectively arranged on two opposite walls of the heating chamber.
The invention also provides a control method of the dehumidification device in the small test curing barn, when the heat pump unit is in the dehumidification working condition, the device enters an internal dehumidification operation mode, and the controller controls the heat exhaust air valve and the electric shutter to be opened, so that heat generated by the condenser is exhausted outwards through the heat exhaust air valve.
Optionally, in the baking process of the small baking room, when the wet bulb temperature of the baking room is not less than the wet bulb target temperature + [ deviation on dehumidification start ], 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 working modes of the hot air exhaust valve comprise a manual mode and an automatic mode.
Optionally, the manual mode is manually set according to 7 gears, namely 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and closed.
Optionally, the automatic mode is controlled by:
(1) When the temperature of the dry bulb of the small curing barn is more than the target dry bulb temperature+ [ deviation of starting the hot-air discharging dry bulb ], controlling the hot-air discharging valve to be fully opened;
(2) When the temperature of the dry bulb of the small curing barn is less than the target dry bulb temperature [ deviation under the start of the heat removal dry bulb ], [ the heat removal air valve is controlled to be fully closed ];
(3) When the temperature of the dry bulb is between the temperature differences, the on-time duty ratio of the heat exhaust air valve is adjusted according to the temperature deviation condition, and the controller automatically adjusts the opening angle of the heat exhaust air valve, so that the heat exhaust speed is effectively adjusted until the heat exhaust air valve is closed.
Optionally, when the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ], opening the heat removal air valve to 15 ℃;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.1deg.C, and the heat removal air valve is opened to 30 ℃;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.2deg.C, and the heat removal air valve is opened to 45 deg.C;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.3deg.C, and the heat removal air valve is opened to 60 degrees;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.4deg.C, and the heat removal air valve is opened to 75 deg.C;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.5deg.C, and the heat removal air valve is opened to 90 degrees;
when the target dry bulb temperature-current dry bulb temperature is not less than [ deviation under heat removal starting ], closing the heat removal air valve;
and the adjusting period of the heat exhaust air valve is 12S.
According to research, the fact that the temperature fluctuation in the smoke chamber of the existing small test flue-curing barn is large under the dehumidifying working condition of the heat pump unit is that heat generated by the condenser can enter the smoke chamber under the dehumidifying working condition, and the temperature in the smoke chamber can be greatly improved due to the small volume of the small test flue-curing barn, so that stable temperature dehumidification cannot be achieved.
The beneficial effects of the invention are as follows: according to the invention, the heat 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 heat exhaust air valve are started under the dehumidifying working condition of the heat pump unit, and the small-range exhaust route in the heat pump unit is formed through fresh air inlet linkage, so that the heat generated by the condenser is timely and outwards exhausted by the heat exhaust air valve, the heat entering the smoke-filling chamber is reduced, the baking temperature in the smoke-filling chamber is more stable, and the baking quality of tobacco leaves is improved.
Better, the invention combines the original temperature and humidity detection device and other parts in the baking room to realize the monitoring of the temperature in the baking oven, and the temperature in the baking room is compared, the control precision is greatly improved by automatic regulation and control, the temperature stabilization and dehumidification are realized, the temperature stabilization control precision can be within +/-1 ℃, and is far lower than the current +/-3 ℃.
Drawings
FIG. 1 is a schematic view of a dehumidifying device in a laboratory room;
FIG. 2 is a schematic view of the dehumidifying device in the test chamber at another view angle;
FIG. 3 is a schematic view of the interior of the heating chamber with the heating chamber removed;
FIG. 4 is a side view with the heating chamber removed;
FIG. 5 is a schematic view of the structure of the smoke chamber and the partition;
reference numerals illustrate:
the device comprises a smoke chamber 1, a heating chamber 2, a partition plate 3, a return air inlet 4, an air inlet 5, a circulating fan 6, a heat exchanger 7, a dehumidifying evaporator 8, a condenser 9, a heat exchange fan 10, a hot air valve 11, an electric shutter 12 and a controller 13.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
Referring to fig. 1 to 5, the dehumidifying device in a small test curing barn in this embodiment includes a small curing barn, a heat pump unit, an inner dehumidifying device and a controller 13.
The small flue-curing barn comprises a tobacco accommodating chamber 1 and a heating chamber 2, a partition plate 3 is arranged between the tobacco accommodating 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 accommodating chamber 1 and are respectively used for acquiring the dry bulb temperature and the wet bulb temperature. The circulating fan 6 is mainly used for guiding air at the side of the return air inlet 4 in the heating chamber 2 to the side of the air inlet 5. In this embodiment, the heating chamber 2 is closed.
The heat pump unit is arranged in the heating chamber 2 and comprises a heat exchanger 7, a dehumidifying evaporator 8 and a condenser 9, wherein the dehumidifying evaporator 8 is close to the air return opening 4, and the heat exchanger 7 is arranged on the inner wall of the heating chamber 2 between the dehumidifying evaporator 8 and the condenser 9 and is communicated with the external environment through a wall heat exchange fan 10 arranged on the heating chamber 2. In the heating mode, the heat exchange fan 10 is started, external air is in contact with the heat exchanger 7 for heat exchange, working medium in the heat exchanger 7 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-pressure gas is sent into the condenser 9, the high-temperature and high-pressure gas is heated by the working medium and then sent into the smoke-accommodating chamber 1 through the air inlet 5 by the circulating fan 6, the working medium is cooled into liquid, and the liquid flows into the heat exchanger 7 again after being throttled and cooled by the expansion valve, so that the circulating work is repeated. In the dehumidification mode, the heat exchanger 7 stops working, the dehumidification evaporator 8 and the condenser 9 start working, the air coming out from the return air inlet 4 is dehumidified by the dehumidification evaporator 8, and the liquid generated by dehumidification is led out of the heating chamber 2 through a pipeline.
The inner dehumidifying device comprises a hot air discharging valve 11 and an electric shutter 12, wherein the electric shutter 12 is arranged on the wall of the heating chamber 2 and is positioned above the circulating fan 6, and the hot air discharging valve 11 is arranged on the wall of the heating chamber 2 and is close to the air inlet 5. In this embodiment, two hot air discharge valves 11 are respectively installed on two opposite walls of the heating chamber 2.
The controller 13, the controller 13 is connected with the dry bulb thermometer, the wet bulb thermometer, the heat pump unit, the heat exhaust air valve 11 and the electric shutter 12. The detected temperature values of 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 heat exhaust air 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 baking room, typically a single-chip microcomputer.
The invention also provides a control method for the dehumidification device in the small test flue-curing barn, when the heat pump unit is in the dehumidification working condition, the device enters an internal dehumidification operation mode, the controller 13 controls the hot air exhaust valve 11 and the electric louver 12 to be opened, and a small-range exhaust route in the heat pump unit is formed through fresh air inlet linkage, so that heat generated by the condenser 9 is exhausted outwards through the hot air exhaust valve 11, further, heat generated by the condenser 9 working under the dehumidification working condition can be exhausted outside the heating chamber 2, the heat is reduced to enter the flue-curing chamber 1 through the air inlet 5 to influence the curing temperature in the flue-curing chamber 1, the curing temperature in the flue-curing chamber 1 is more stable, the tobacco curing quality is improved, and the curing problem caused by temperature overshoot (generally more than 3 ℃) is effectively avoided.
Optionally, in the baking process of the small baking room, when the wet bulb temperature of the baking room is not less than the wet bulb target temperature [ the upper deviation of dehumidification start ], an inner dehumidification operation mode is entered, and the operation of the heat pump unit is not influenced by the dry bulb temperature. That is, the device starts the hot air exhaust valve 11 and the electric shutter 12. It should be noted that the hot air valve 11 is only opened when the curing barn is in the dehumidifying condition, and the rest is closed. 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 upper deviation of dehumidification start refers to the set temperature deviation of the device in the inner dehumidification operation mode, and the device only enters the inner dehumidification operation mode when the wet bulb temperature of the flue-curing barn is larger than the sum of the wet bulb target temperature and the upper deviation of dehumidification start, so that the problem that the temperature of the flue-curing chamber 1 is reduced and the baking target temperature is not matched due to heat dissipation caused by the fact that the device immediately enters the inner dehumidification operation mode under the dehumidification working condition of a small flue-curing barn can be avoided.
Alternatively, the operation modes of the heat exhaust damper 11 include a manual mode and an automatic mode. In the manual mode, the opening angle of the hot blast valve 11 can be directly controlled. In the automatic mode, the opening angle of the hot blast valve 11 is controlled by the controller 13 according to a preset command.
Optionally, the manual mode is manually set in 7 gears, which are 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and closed respectively.
Optionally, the automatic mode is controlled by: (1) When the temperature of the dry bulb of the small curing barn is more than the target dry bulb temperature+ [ deviation of starting the hot dry bulb ], controlling the hot air exhaust valve 11 to be fully opened; (2) When the temperature of the dry bulb of the small curing barn is less than the target dry bulb temperature [ deviation under the start of the hot dry bulb ], [ the hot air exhaust valve 11 is controlled to be fully closed; (3) When the dry bulb temperature is between the temperature differences, namely between (1) and (2), the on-time duty ratio 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 as to effectively adjust the heat exhaust speed until the heat exhaust air valve is closed. In this embodiment, the upper deviation of the start of the hot air exhaust valve and the lower deviation of the start of the hot air exhaust valve are set values of the device entering the full open and full closed of the hot air exhaust valve 11.
Specifically, when the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ], opening the heat removal air valve by 11 to 15 degrees; the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.1deg.C, and the heat removal air valve is opened for 11 to 30 degrees; the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.2deg.C, and the heat removal air valve is opened for 11 to 45 degrees; the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.3deg.C, and the heat removal air valve is opened for 11 to 60 degrees; the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.4deg.C, and the heat removal air valve is opened for 11 to 75 degrees; the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.5deg.C, and the heat removal air valve is opened for 11 to 90 degrees; when the target dry bulb temperature-current dry bulb temperature is not less than [ deviation under heat removal starting ], closing the heat removal air valve 11; the adjustment period of the hot blast valve 11 was 12S. According to the invention, the opening angle of the hot air exhaust valve 11 is adjusted according to the actual change of the temperature difference, so that the heat exhaust rate can be correspondingly adjusted, the temperature of the dry bulb in the smoke-accommodating chamber 1 is more matched and consistent with the target temperature, and the baking quality can be improved. The electric blind 12 of the present invention has only two states, closed and fully open.
The baking test is carried out on the test small baking room before and after transformation, 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 heat exhausting air valve 11 of the test small baking room after transformation is controlled according to the automatic mode, and the test data of partial temperature and humidity in the baking process are as follows:
table 1 baking test data of non-opened hot blast valve
TABLE 2 baking test data by opening the exhaust hot air valve
Through the comparison of the two baking data, it can be seen that by adding the heat removal device, the overshoot of the dry bulb temperature under the internal dehumidification working condition is obviously inhibited.
According to the invention, the heat exhaust air valves 11 are arranged on two sides of the air inlet in the heating chamber 2, the electric louver 12 is arranged above the circulating fan 6, the electric louver 12 and the heat exhaust air valve 11 are started under the dehumidifying working condition of the heat pump unit, and a small-range exhaust route in the heat pump unit is formed by the linkage of fresh air inlet, so that the heat generated by the condenser 9 is timely exhausted outwards through the heat exhaust air valves 11, the heat entering the smoke-accommodating chamber 1 is reduced, the baking temperature in the smoke-accommodating chamber 1 is more stable, and the baking quality of tobacco leaves is improved. The temperature inside the oven is monitored by combining the original temperature and humidity detection devices and other parts in the baking room, the control precision is greatly improved by the automatic adjustment and control of temperature comparison in the baking room, the temperature stabilization and dehumidification are realized, and the temperature stabilization control precision can be within +/-1 ℃.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (3)
1. A control method of a dehumidifying device in a small test curing barn, the device comprising:
the small flue-curing barn comprises a flue-curing chamber (1) and a heating chamber (2), wherein a partition plate (3) is arranged between the flue-curing 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 flue-curing chamber (1);
the heat pump unit is arranged in the heating chamber (2) and comprises a heat exchanger (7), a dehumidifying evaporator (8) and a condenser (9), wherein the dehumidifying evaporator (8) is arranged close to the air return opening (4), and the heat exchanger (7) is arranged on the inner wall of the heating chamber (2) between the dehumidifying evaporator (8) and the condenser (9) and is communicated with the external environment through a wall heat exchange fan (10) arranged in the heating chamber (2);
the inner dehumidification device comprises two heat exhaust air valves (11) and two electric shutters (12), wherein the electric shutters (12) are arranged on the wall of the heating chamber (2) and are positioned above the circulating fan (6), the heat exhaust air valves (11) are arranged on the wall of the heating chamber (2) and are close to the air inlet (5), and the two heat exhaust air valves (11) are respectively arranged on two opposite walls of the heating chamber (2);
the controller (13) is electrically connected with the dry bulb thermometer, the wet bulb thermometer, the heat pump unit, the heat exhaust air valve (11) and the electric louver (12);
the control method of the device comprises the following steps: when the heat pump unit is in a dehumidification working condition, the device enters an internal dehumidification operation mode, the controller (13) controls the heat exhaust air valve (11) and the electric louver (12) to be opened, so that heat generated by the condenser (9) is exhausted outwards from the heat exhaust air valve (11), and in the baking process of the small baking room, when the wet bulb temperature of the baking room is more than or equal to the wet bulb target temperature+ [ upper deviation of dehumidification start ], the heat pump unit enters the internal dehumidification operation mode, the operation of the heat pump unit is not influenced by the dry bulb temperature, and the working modes of the heat exhaust air valve (11) comprise a manual mode and an automatic mode;
the control mode of the automatic mode is as follows:
(1) When the temperature of the dry bulb of the small curing barn is more than the target dry bulb temperature+ [ deviation of starting the hot dry bulb ], controlling the hot air exhaust valve (11) to be fully opened;
(2) When the temperature of the dry bulb of the small curing barn is less than the target dry bulb temperature [ deviation under the start of the hot dry bulb ], [ the hot air exhaust valve (11) is controlled to be fully closed;
(3) When the temperature of the dry bulb is between the temperature differences, the on-time duty ratio 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) to effectively adjust the heat exhaust speed until the heat exhaust air valve is closed.
2. The method for controlling the dehumidifying device in the small test flue-curing barn according to claim 1, wherein the manual mode is manually set in 7 gears of 15 °, 30 °, 45 °, 60 °, 75 °, 90 °, and closed.
3. The method for controlling a dehumidifying device in a laboratory as claimed in claim 1, wherein,
when the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ], opening the heat removal air valve (11) to 15 ℃;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.1deg.C, and the heat removal air valve (11) is opened to 30 degrees;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.2deg.C, and the heat removal air valve (11) is opened to 45 degrees;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.3deg.C, and the heat removal air valve (11 to 60 degrees;
the current dry bulb temperature-target dry bulb temperature is more than or equal to [ deviation on heat removal starting ] +0.4deg.C, and the heat removal air valve (11) is opened to 75 degrees;
the current dry bulb temperature-target dry bulb temperature is not less than [ deviation on heat removal starting ] +0.5deg.C, and the heat removal air valve (11) is opened to 90 degrees;
when the target dry bulb temperature-current dry bulb temperature is not less than [ deviation under heat removal starting ], closing the heat removal air valve (11);
the adjustment period of the heat exhaust air valve (11) is 12S.
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| CN202111098777.2A CN113834311B (en) | 2021-09-18 | 2021-09-18 | Dehumidification device in small test curing barn and control method thereof |
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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 |
| CN206504551U (en) * | 2017-02-22 | 2017-09-19 | 淄博桑瑞斯新能源股份有限公司 | A kind of drying unit |
| CN107202475A (en) * | 2017-07-03 | 2017-09-26 | 刘贵平 | A kind of air source heat pump drying system |
| 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 |
| 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 |
| CN206504551U (en) * | 2017-02-22 | 2017-09-19 | 淄博桑瑞斯新能源股份有限公司 | A kind of drying unit |
| 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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