Double-water-circulation constant-temperature and constant-humidity cabinet and control method thereof

Abstract

The double-water-circulation constant-temperature and constant-humidity cabinet comprises a cabinet body, a refrigerating and heating system and a humidifying system are arranged in the cabinet body, a submersible heater is arranged in a water tank, and a water tank evaporator is located in the water tank; an air temperature probe is arranged in the cabinet body; the air evaporator is located in the air duct, the air duct is provided with an air circulating fan, and the refrigeration constant-temperature water pump is communicated with a pipeline of the air evaporator; the refrigeration constant-temperature water pump is positioned in the water tank; the water temperature probe, the submersible heater and the air temperature probe are electrically connected with the microcomputer power panel, and a microcomputer control module in the microcomputer power panel controls the submersible heater, the air circulating fan, the refrigeration constant-temperature water pump and the compressor to work. The temperature rise temperature fluctuation is small, the temperature reduction temperature fluctuation is small, the constant-temperature and constant-humidity process with small temperature fluctuation can be automatically achieved, and the temperature in the cabinet can be accurately controlled. And the dehumidification efficiency is improved. The structure change is small. The invention further discloses a control method of the double-water-circulation constant-temperature and constant-humidity cabinet.

Description

Technical Field

[0001] The invention relates to a double-water circulation constant temperature and humidity cabinet and a control method thereof, belonging to the technical field of constant temperature and humidity cabinets. Background Art

[0002] The constant temperature and humidity cabinet in the prior art is mainly composed of a cabinet, a refrigeration system, an air heater, and a humidification system. The refrigeration system includes an evaporator, which is installed in the cabinet, an air heater is installed in the cabinet, and a humidification system is installed in the cabinet. During operation, when the air needs to be heated, the air heater is directly powered on to achieve heating, and the air circulation is blown by the fan to achieve temperature rise in the cabinet. When cooling is required, the refrigeration system is directly started, and the cabinet is cooled by the evaporator. When humidification is required, the humidification system is started to humidify the cabinet. When heating is directly achieved through the air heater, the temperature in the cabinet will rise rapidly, causing the cabinet to heat up too quickly. The temperature fluctuation in the cabinet will also be too large, which will have a greater impact on items close to the air outlet. In addition, when the evaporator is used for cooling, the cooling speed is also too fast, which will cause the temperature fluctuation in the cabinet to be too large. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a double water circulation constant temperature and humidity cabinet, which has small temperature fluctuation during heating and can automatically realize a constant temperature and humidity process with small temperature fluctuation, which is conducive to accurately controlling the temperature in the cabinet.

[0004] The invention also relates to a control method for a double water circulation constant temperature and humidity cabinet.

[0005] The double water circulation constant temperature and humidity cabinet of the present invention can adopt the following technical scheme:

[0006] A double water circulation constant temperature and humidity cabinet comprises a cabinet body, a refrigeration and heating system and a humidification system are arranged in the cabinet body, the refrigeration and heating system comprises a water tank evaporator, an air evaporator and a water tank; the water tank is located in the cabinet body, a submersible heater is arranged in the water tank, a water temperature probe is arranged in the water tank, and the water tank evaporator is located in the water tank; an air temperature probe is arranged in the cabinet body; an air duct is arranged in the cabinet body, the air evaporator is located in the air duct, an air circulation fan is arranged in the air duct, and the air duct is connected with the cabinet body; the water tank evaporator is a cooling component of the refrigeration equipment; the air evaporator The device includes an air evaporator pipeline, an input pipe and an output pipe of the air evaporator pipeline extend into the water tank, and a refrigeration constant temperature water pump is connected with the pipeline of the air evaporator; the refrigeration constant temperature water pump is located in the water tank; a water temperature probe, a submersible heater, an air temperature probe, an air circulation fan, and a refrigeration constant temperature water pump are electrically connected to a microcomputer power board respectively, and a compressor of the refrigeration equipment is electrically connected to the microcomputer power board. A microcomputer control module in the microcomputer power board controls the submersible heater, the air circulation fan, the refrigeration constant temperature water pump, and the compressor to work.

[0007] The present invention can further adopt the following improvement measures to solve the problem:

[0008] A further improvement measure is that the submersible heater is fixed to the water tank.

[0009] A further improvement measure is: the water tank comprises a metal inner tank and a heat-insulating layer, wherein the heat-insulating layer is located outside the metal inner tank; and the submersible heater is closely attached to the metal inner tank.

[0010] A further improvement measure is that a humidity probe is arranged in the cabinet, and the humidity probe is electrically connected to the microcomputer power board.

[0011] Further improvement measures are: a humidifying water pump is provided in the water tank, the humidifying water pump is electrically connected to the microcomputer power board, and the microcomputer control module in the microcomputer power board controls the humidifying water pump to work; the humidifying system includes a humidifying aluminum and a water suction hose, the inlet end of the water suction hose extends into the water tank, the humidifying water pump is connected to the water suction hose, and the outlet end of the water suction hose is located above the humidifying aluminum.

[0012] A further improvement measure is that the water tank evaporator is in the shape of a circuitous curved pipeline.

[0013] A further improvement measure is: one end of the pipeline of the water tank evaporator is connected to the compressor, and the other end of the pipeline of the water tank evaporator is connected to the condenser.

[0014] A further improvement measure is that the cover body seals the opening of the water tank.

[0015] A further improvement measure is that an air heater is arranged in the cabinet, and the air heater is electrically connected to the microcomputer power supply board.

[0016] The present invention provides a control method for a double water circulation constant temperature and humidity cabinet, which adopts the following technical scheme: a control method for a double water circulation constant temperature and humidity cabinet, when the temperature in a water tank needs to be raised, a microcomputer control module controls the execution of the following steps: 1) when the condition of the water temperature probe T2>T1-C1 is no, and the water temperature probe T2≤T1-C7, the submersible heater is turned on to heat the water tank; 2) when the water temperature probe T2>T1-C7+C8, the submersible heater is stopped; T1 is: the actual measured value of the air temperature probe; T2 is: the actual measured value of the water temperature probe; C1 is: the cooling compensation value of the water temperature probe.

[0017] This control method can reduce the temperature fluctuation and have little impact on the items in the cabinet.

[0018] The control method of a double-water-circulation constant-temperature and constant-humidity cabinet of the present invention adopts the following technical solutions: A control method of a double-water-circulation constant-temperature and constant-humidity cabinet. When cooling the air inside the cabinet, the microcomputer control module controls and executes the following steps: 1) When the condition that the water temperature probe T2 > T1 - C1 is met, turn on the compressor to refrigerate the water tank evaporator until the water temperature probe T2 ≤ T1 - C1 + C2, then stop the compressor from refrigerating the water tank evaporator; 2) When the air temperature probe T1 > T0 + C3, turn on the refrigeration constant-temperature water pump, start the air evaporator to refrigerate, and turn on the air circulation fan; 3) When the air temperature probe T1 < T0 - C3 - C4, stop the refrigeration constant-temperature water pump and the air circulation fan from working.

[0019] This control method can make the cooling fluctuation small and the cooling process orderly, with little impact on the items inside the cabinet and energy saving.

[0020] The control method of a double-water-circulation constant-temperature and constant-humidity cabinet of the present invention adopts the following technical solutions: A control method of a double-water-circulation constant-temperature and constant-humidity cabinet. When dehumidifying the air inside the cabinet, the microcomputer control module controls and executes the following steps: 1) When the condition that the water temperature probe T2 > T1 - C1 is met, turn on the compressor to refrigerate the water tank evaporator until the water temperature probe T2 ≤ T1 - C1 + C2, then stop the compressor from refrigerating the water tank evaporator; 2) When the condition that the humidity probe Hb inside the box > H0 + D1 is not met, and the humidity probe Hb inside the box ≤ H0 - D3, and the water temperature probe T2 ≤ Ts - E1; turn on the refrigeration constant-temperature water pump, start the air evaporator to refrigerate, and turn on the air circulation fan to start dehumidifying; 3) When the humidity probe Hb inside the box > H0 - D3 + D4, stop the refrigeration constant-temperature water pump, stop the circulation fan, and stop dehumidifying.

[0021] This control method can make the temperature fluctuation small during dehumidification, avoid a sharp drop in temperature, and is environmentally friendly and energy-saving.

[0022] The above technical solutions have the following technical effects:

[0023] 1. The temperature fluctuation during heating of the present invention is small, and it can automatically achieve a constant-temperature and constant-humidity process with small temperature fluctuations, which is beneficial to accurately control the temperature inside the cabinet.

[0024] 2. The temperature fluctuation during cooling of the present invention is small, which is beneficial to automatically achieve a constant-temperature and constant-humidity process with small temperature fluctuations and is beneficial to accurately control the temperature inside the cabinet.

[0025] 3. When dehumidifying, the temperature change fluctuation of the present invention is small, which is beneficial to the accurate control of temperature and the efficiency of dehumidification.

[0026] 4. Compared with the prior art, the present invention has small structural changes and high energy transfer efficiency, and can be widely applied.

[0027] 5. The control method of the present invention can enable the dual-water circulation constant temperature and humidity cabinet of the present invention to automatically realize a constant temperature and humidity process with small temperature fluctuations, which is beneficial to accurately control the temperature in the cabinet.

[0028] 6. When the present invention realizes the heating and humidification functions in the cabinet at the same time, it only needs to turn on the heating function and the submersible heater. The temperature fluctuation is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a partial exploded schematic diagram of the structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the structure of the present invention after the cabinet door is removed.

[0031] Figure 3 It is a schematic diagram of the present invention after the air duct plate is removed.

[0032] Figure 4 yes Figure 3 A partial enlarged schematic diagram of the structure.

[0033] Figure 5 It is a circuit principle structure block diagram of the present invention.

[0034] Figure 6 This is a schematic diagram of the exploded components of the water tank.

[0035] Figure 7 yes Figure 2 Schematic diagram of the cross-sectional structure in the CC direction.

[0036] Figure 8 yes Figure 2 Schematic diagram of the cross-sectional structure in the DD direction.

[0037] Fig. 9 It is another structural cross-sectional schematic diagram of the present invention.

[0038] Fig.10 It is a control logic schematic diagram of the circuit of the present invention. DETAILED DESCRIPTION

[0039] The present invention is described in detail below with reference to specific embodiments.

[0040] Example 1: Figures 1 to 10 As shown, a dual water circulation constant temperature and humidity cabinet includes a cabinet body, a refrigeration and heating system and a humidification system are arranged in the cabinet body, and the refrigeration and heating system includes a water tank evaporator 1, an air evaporator 2, and a water tank 3. Figure 4As shown, the water tank 3 is located inside the cabinet. A submersible heater 31 is provided inside the water tank 3, a water temperature probe 32 is provided inside the water tank, and the water tank evaporator 1 is located inside the water tank 3. An air temperature probe is provided inside the cabinet 100. An air duct 5 is provided inside the cabinet, and the air evaporator 2 is located inside the air duct. The air duct is provided with an air circulation fan 51. In this example, the air circulation fan is installed on the duct board 6, and the air duct communicates with the inside of the cabinet. The water tank evaporator 1 is a heat dissipation component of the refrigeration device. The air evaporator 2 includes an air evaporator pipeline. The input pipe of the air evaporator pipeline and the output pipe of the air evaporator pipeline extend into the water tank 3, and the refrigeration constant temperature water pump 33 communicates with the pipeline of the air evaporator 2. The refrigeration constant temperature water pump 33 is located inside the water tank. The water temperature probe 32, the submersible heater 31, the air temperature probe, the air circulation fan 51, and the refrigeration constant temperature water pump 33 are respectively electrically connected to the microcomputer power board, and the compressor 200 of the refrigeration device is electrically connected to the microcomputer power board. The microcomputer control module in the microcomputer power board controls the submersible heater 31, the air circulation fan 51, the refrigeration constant temperature water pump 33, and the compressor 200 to work.

[0041] Working principle: Since the submersible heater is placed in the water tank, when the cabinet needs to perform various temperature adjustment functions, it can first adjust the water temperature in the water tank. Thus, it reduces the problem of large fluctuations when the temperature needs to be raised. A control method for a double-water-circulation constant temperature and humidity cabinet. When the temperature in the water tank needs to be raised, the microcomputer control module controls the following steps: 1) When the condition that the water temperature probe T2 > T1 - C1 is not met and the water temperature probe T2 ≤ T1 - C7, the submersible heater is turned on to heat the water tank. The water temperature probe is the water tank probe. 2) When the water temperature probe T2 > T1 - C7 + C8, the submersible heater is stopped. This control method can make the temperature drop with small fluctuations and orderly temperature drop. It has little impact on the items in the cabinet and is energy-saving. A control method for a double-water-circulation constant temperature and humidity cabinet. When the air inside the cabinet needs to be cooled, the microcomputer control module controls the following steps: 1) When the condition that the water temperature probe T2 > T1 - C1 is met, the compressor is turned on to refrigerate the water tank evaporator until the water tank probe T2 ≤ T1 - C1 + C2, then the compressor is stopped from refrigerating the water tank evaporator. The water temperature probe is the water tank probe. 2) When the air temperature probe T1 > T0 + C3, the refrigeration constant temperature water pump (which can also be called the refrigeration water pump) is turned on, the air evaporator starts to refrigerate, and the air circulation fan is turned on. The air temperature probe is the temperature sensor inside the box. 3) When the air temperature probe T1 < T0 - C3 - C4, the refrigeration constant temperature water pump and the air circulation fan stop working. The air temperature probe is the temperature sensor inside the box. This control method can make the temperature drop with small fluctuations and orderly temperature drop. It has little impact on the items in the cabinet and is energy-saving.

[0042] Glossary: ​​TO is the set temperature value; T1 is the actual value measured by the air temperature probe; T2 is the actual value measured by the water temperature probe; HO is the set humidity value; Hb is the actual value measured by the humidity probe; Ts is the current dew point temperature value;

[0043] Compensation parameter description: C1 is: water temperature probe cooling compensation value; C2 is: water temperature probe cooling temperature difference value; C3 is: air temperature probe cooling compensation value; C4 is: air temperature probe cooling temperature difference value; C5 is: air temperature probe heating compensation value; C6 is: air temperature probe heating temperature difference value; C7 is: water tank temperature probe heating compensation value; C8 is: water tank temperature probe heating temperature difference value; D1 is: air humidity probe humidification compensation value; D2 is: air humidity probe humidification difference value; D3 is: air humidity probe dehumidification compensation value; D4 is: air humidity dehumidification compensation value; E1 is: water temperature probe cooling compensation value during dehumidification; E2 is: water temperature probe cooling difference value during dehumidification.

[0044] When the temperature inside the cabinet needs to be raised, the water in the water tank is heated, and then the temperature inside the cabinet is raised through the air evaporator. The temperature fluctuation is small. This is conducive to accurate temperature control. When the temperature inside the cabinet needs to be lowered, the water in the water tank is cooled, and then the temperature inside the cabinet is lowered through the air evaporator. The temperature fluctuation is small. This is conducive to accurate temperature control. Various parameters can also be adjusted to improve efficiency and reduce energy consumption.

[0045] Embodiment 2: The characteristics of this embodiment are as follows: Figure 4 , the submersible heater 31 is fixed to the water tank 3 .

[0046] like Figure 4 , Figure 7 , Figure 8 As shown, the water tank 3 includes a metal liner 34 and a heat-insulating layer 35, wherein the heat-insulating layer 35 is located outside the metal liner; the submersible heater 31 is closely attached to the metal liner. This structure has high energy transfer efficiency. The rest can be the same as in Example 1.

[0047] Embodiment 3: The characteristic of this embodiment is that a humidity probe is provided in the cabinet, a humidifying water pump 36 is provided in the water tank, the humidity probe and the humidifying water pump 36 are electrically connected to a microcomputer power board, and a microcomputer control module in the microcomputer power board controls the humidifying water pump 36 to work.

[0048] The humidification system includes a humidification aluminum 7 and a water extraction hose 71. The inlet end of the water extraction hose 71 extends into the water tank 3. The humidification water pump 36 is connected to the water extraction hose 71. The outlet end of the water extraction hose 71 is located above the humidification aluminum 7. The rest can be the same as in Embodiment 1 and Embodiment 2.

[0049] Working principle: A control method for a double water circulation constant temperature and humidity cabinet. When dehumidifying the air in the cabinet, the microcomputer control module controls the execution of the following steps: 1) When the water temperature probe T2>T1-C1, the compressor is turned on to cool the water tank evaporator until the water temperature probe T2≤T1-C1+C2, and the compressor is stopped to cool the water tank evaporator. The water temperature probe is the water tank probe. 2) When the condition of the humidity probe Hb>H0+D1 in the cabinet is no, and the humidity probe Hb≤H0-D3 in the cabinet, and the water temperature probe T2≤Ts-E1; the refrigeration constant temperature water pump is turned on, the air evaporator starts to cool, the air circulation fan is turned on, and dehumidification begins. The humidity probe is the humidity sensor in the cabinet, and the water tank probe is the water temperature probe. 3) When the humidity probe Hb in the cabinet>H0-D3+D4, the refrigeration constant temperature water pump is stopped, the circulation fan is stopped, and the dehumidification is stopped. The humidity probe (humidity probe in the cabinet) is the humidity sensor in the cabinet. This control method can reduce the temperature fluctuation during dehumidification and avoid temperature concentration drop. It is environmentally friendly and energy-saving.

[0050] Glossary: ​​TO is the set temperature value; T1 is the actual value measured by the air temperature probe; T2 is the actual value measured by the water temperature probe; HO is the set humidity value; Hb is the actual value measured by the humidity probe; Ts is the current dew point temperature value.

[0051] Compensation parameter description: C1 is: water temperature probe cooling compensation value; C2 is: water temperature probe cooling temperature difference value; C3 is: air temperature probe cooling compensation value; C4 is: air temperature probe cooling temperature difference value; C5 is: air temperature probe heating compensation value; C6 is: air temperature probe heating temperature difference value; C7 is: water tank temperature probe heating compensation value; C8 is: water tank temperature probe heating temperature difference value; D1 is: air humidity probe humidification compensation value; D2 is: air humidity probe humidification difference value; D3 is: air humidity probe dehumidification compensation value; D4 is: air humidity dehumidification compensation value; E1 is: water temperature probe cooling compensation value during dehumidification; E2 is: water temperature probe cooling difference value during dehumidification.

[0052] When dehumidifying, the temperature fluctuation is small. It is conducive to the precise control of temperature. It is conducive to the efficiency of dehumidification. It can also use the adjustment of various parameters to improve efficiency and reduce energy consumption.

[0053] Embodiment 4: The characteristic of this embodiment is that the water tank evaporator 1 is in the shape of a circuitous curved pipe. The water tank evaporator 1 can be closely attached to or welded to the metal inner tank 34. This is conducive to improving the refrigeration efficiency.

[0054] Like conventional refrigeration equipment, one end of the pipeline of the water tank evaporator is connected to the compressor, and the other end of the pipeline of the water tank evaporator is connected to the condenser. The rest can be the same as in Example 1, Example 2, and Example 3.

[0055] Embodiment 5: The feature of this embodiment is that the cover 300 seals the opening of the water tank 3, thereby avoiding the loss of cooling or heat. The rest is the same as the other embodiments.

[0056] Embodiment 6: The characteristic of this embodiment is that an air heater is provided in the cabinet. When the air in the cabinet needs to be heated, the microcomputer control module controls the execution of the following steps: 1) When the condition of the air temperature probe T1>T0+C3 is no, and the air temperature probe T1≤T0-C5, turn on the air heater to heat the water tank and turn on the air circulation fan. The air temperature probe is the temperature sensor in the cabinet or the air probe. 2) When T1≤T0-C5+C6, stop the air heater. With the air heater, the air heating function and the dehumidification function can be realized in the cabinet at the same time. In order to realize the heating (heating) and humidification functions in the cabinet at the same time, the submersible heater is turned on and the air heater is not turned on. When the cabinet is heated alone, the submersible heater is turned on. In general, the submersible heater is the main one and the air heater is the auxiliary one.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double water circulation constant temperature and humidity cabinet, characterized by: It includes a cabinet body, and a refrigeration and heating system and a humidification system are provided inside the cabinet body. The refrigeration and heating system includes a water tank evaporator, an air evaporator, and a water tank. The water tank is located inside the cabinet body. A submersible heater is provided inside the water tank, and a water temperature probe is provided inside the water tank. The water tank evaporator is located inside the water tank. An air temperature probe is provided inside the cabinet body. An air duct is provided inside the cabinet body. The air evaporator is located inside the air duct. An air circulation fan is provided in the air duct, and the air duct is communicated with the inside of the cabinet. The water tank evaporator is a heat dissipation component of the refrigeration device. The air evaporator includes an air evaporator pipeline. The input pipe of the air evaporator pipeline and the output pipe of the air evaporator pipeline extend into the water tank. The refrigeration constant temperature water pump is communicated with the pipeline of the air evaporator. The refrigeration constant temperature water pump is located inside the water tank. The water temperature probe, the submersible heater, the air temperature probe, the air circulation fan, and the refrigeration constant temperature water pump are respectively electrically connected to the microcomputer power board. The compressor of the refrigeration device is electrically connected to the microcomputer power board. The microcomputer control module in the microcomputer power board controls the submersible heater, the air circulation fan, the refrigeration constant temperature water pump, and the compressor to work.

2. The double water circulation constant temperature and humidity cabinet according to claim 1 is characterized in that: The submersible heater is fixed to the water tank.

3. The double water circulation constant temperature and humidity cabinet according to claim 1 is characterized in that: The water tank includes a metal inner tank and a heat preservation layer. The heat preservation layer is located outside the metal inner tank. The submersible heater is closely attached to the metal inner tank.

4. The double water circulation constant temperature and humidity cabinet according to claim 1 is characterized in that: A humidity probe is provided inside the cabinet body, and the humidity probe is electrically connected to the microcomputer power board.

5. The double water circulation constant temperature and humidity cabinet according to claim 4 is characterized in that: A humidification water pump is provided inside the water tank. The humidification water pump is electrically connected to the microcomputer power board. The microcomputer control module in the microcomputer power board controls the humidification water pump to work. The humidification system includes a humidification aluminum and a pumping hose. The inlet end of the pumping hose extends into the water tank. The humidification water pump is communicated with the pumping hose. The outlet end of the pumping hose is located above the humidification aluminum.

6. The double water circulation constant temperature and humidity cabinet according to claim 1 is characterized in that: The water tank evaporator is in the shape of a circuitously bent pipeline.

7. The double water circulation constant temperature and humidity cabinet according to claim 1 is characterized in that: An air heater is provided inside the cabinet body, and the air heater is electrically connected to the microcomputer power board.

8. A control method for a double water circulation constant temperature and humidity cabinet according to claim 1, characterized in that: When the temperature of the water in the water tank needs to be raised, the microcomputer control module controls the execution of the following steps: 1) When the condition that the water temperature probe T2>T1-C1 is not met and the water temperature probe T2≤T1-C7, turn on the submersible heater to heat the water tank; 2) When the water temperature probe T2>T1-C7+C8, turn off the submersible heater; T1 is the measured value of the air temperature probe; T2 is the measured value of the water temperature probe; C1 is the refrigeration compensation value of the water temperature probe.

9. A control method for a double water circulation constant temperature and humidity cabinet according to claim 1, characterized in that: When the air inside the cabinet body needs to be cooled, the microcomputer control module controls the execution of the following steps: 1) When the condition that the water temperature probe T2>T1-C1 is met, turn on the compressor to refrigerate the water tank evaporator until the water tank probe T2≤T1-C1+C2, then turn off the compressor to refrigerate the water tank evaporator; 2) When the air temperature probe T1>T0+C3, turn on the refrigeration constant temperature water pump, the air evaporator starts to refrigerate, and the air circulation fan is turned on; 3) When the air temperature probe T1<T0-C3-C4, the refrigeration constant temperature water pump and the air circulation fan stop working; T1 is the measured value of the air temperature probe; T2 is the measured value of the water temperature probe; T0 is the set temperature value; C1 is the refrigeration compensation value of the water temperature probe.

10. A control method for a double water circulation constant temperature and humidity cabinet according to claim 1, characterized in that: When the air in the cabinet is dehumidified, the microcomputer control module controls the execution of the following steps: 1) When the water temperature probe T2>T1-C1, the compressor is turned on to cool the water tank evaporator until the water temperature probe T2≤T1-C1+C2, and the compressor is stopped to cool the water tank evaporator; 2) When the condition of the humidity probe Hb>H0+D1 in the cabinet is no, and the humidity probe Hb≤H0-D3 in the cabinet, and the water temperature probe T2≤Ts-E1; the refrigeration constant temperature water pump is turned on, the air evaporator starts to cool, the air circulation fan is turned on, and dehumidification begins; 3) When the humidity probe Hb in the cabinet>H0-D3+D4, the refrigeration constant temperature water pump is stopped, the circulation fan is stopped, and the dehumidification is stopped: T1 is: the actual measured value of the air temperature probe; T2 is: the actual measured value of the water temperature probe; C1 is: the refrigeration compensation value of the water temperature probe; HO is: the set humidity value; Hb is: the actual measured value of the humidity probe; Ts is: the current dew point temperature value.

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