Rotating wheel dehumidification system capable of achieving heat recovery

Abstract

The invention discloses a rotary dehumidification system capable of realizing heat recovery, which comprises a control device, a heat recovery device and a rotary dehumidification unit electrically connected with the control device, and the heat recovery device comprises a first heat pump mechanism, a second heat pump mechanism and a third heat pump mechanism which are electrically connected with the control device respectively; the first heat exchange section of the first heat pump mechanism is located on the fresh air inlet side of the rotating wheel dehumidification unit, and the second heat exchange section of the first heat pump mechanism, the evaporation section of the third heat pump mechanism and the evaporation section of the second heat pump mechanism are sequentially arranged in the regeneration exhaust direction of the rotating wheel dehumidification unit. The condensation section of the second heat pump mechanism and the condensation section of the third heat pump mechanism are sequentially arranged in the regeneration air inlet direction of the rotary wheel dehumidification unit. According to the rotating wheel dehumidification system, through cooperation of the three heat pump mechanisms, the temperature of regeneration air input into the rotating wheel dehumidification unit can reach 120 DEG C, the heat energy consumption requirement of the high-temperature regeneration desorption temperature is met, and the cold water consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rotary dehumidification, and in particular to a rotary dehumidification system capable of realizing heat recovery. Background Art

[0002] Rotary dehumidifiers play a vital role in temperature and humidity control places. With the rapid development of science and technology, the concept of high efficiency and energy saving is becoming more and more popular, and the regeneration heating energy consumption of rotary dehumidifiers is also receiving increasing attention. At present, the regeneration heating method of rotary dehumidifiers is mainly high-energy consumption electric heating or high-temperature steam mode. Therefore, in the manufacturing industry, energy consumption optimization and transformation is particularly urgent.

[0003] At present, in order to solve the problem of high energy consumption, a heat pump mechanism is generally used to heat the regeneration inlet air to reduce the energy consumption of regeneration heating; however, the temperature of the regeneration fresh air output by the condensing section of the heat pump mechanism can generally only reach 80℃~90℃, which cannot meet the high-temperature desorption and regeneration requirements of the rotary dehumidifier unit, and the energy-saving effect is not ideal; in addition, the winter climate has a great impact on the continuous and stable operation of the heat pump mechanism, and may even cause the heat pump mechanism to fail to start normally, that is, it is impossible to achieve continuous, efficient and energy-saving operation effects.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a rotary dehumidification system capable of realizing heat recovery, which, through the cooperation of three heat pump mechanisms, can meet the heat energy consumption requirements of high-temperature regeneration and desorption temperature and save cold water consumption.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A rotary dehumidification system capable of realizing heat recovery comprises a control device, a heat recovery device and a rotary dehumidification unit, wherein the heat recovery device comprises a first heat pump mechanism, a second heat pump mechanism and a third heat pump mechanism; the first heat exchange section of the first heat pump mechanism is located at the fresh air inlet side of the rotary dehumidification unit, the second heat exchange section of the first heat pump mechanism, the evaporation section of the third heat pump mechanism and the evaporation section of the second heat pump mechanism are arranged in sequence along the regeneration exhaust direction of the rotary dehumidification unit; the condensation section of the second heat pump mechanism and the condensation section of the third heat pump mechanism are arranged in sequence along the regeneration inlet direction of the rotary dehumidification unit; the first heat pump mechanism, the second heat pump mechanism, the third heat pump mechanism and the rotary dehumidification unit are electrically connected to the control device respectively.

[0008] In the rotary dehumidification system capable of realizing heat recovery, the rotary dehumidification unit includes a first shell, in which a rotary wheel core and a regeneration heating box are arranged, an air valve is arranged on the fresh air inlet side of the first shell, and an exhaust fan is arranged on the regeneration exhaust side of the first shell; the regeneration heating box is arranged on the regeneration inlet side of the rotary wheel core, and is used to further heat the regeneration inlet of the rotary wheel core; the air valve, the exhaust fan and the regeneration heating box are electrically connected to the control device respectively.

[0009] In the rotary dehumidification system capable of realizing heat recovery, a cold water coil is further arranged in the first shell, and the cold water coil is arranged on the air outlet side of the air valve.

[0010] In the rotary dehumidification system capable of achieving heat recovery, the heat recovery device includes a second shell, in which a first cavity, a second cavity and a third cavity are distributed in sequence from top to bottom; the first cavity and the second cavity are separated by a first heat insulation board, and the second cavity and the third cavity are separated by a second heat insulation board; the first heat exchange section of the first heat pump mechanism is located in the third cavity, the second heat exchange section of the first heat pump mechanism, the evaporation section of the third heat pump mechanism and the evaporation section of the second heat pump mechanism are located in the second cavity; the condensation section of the second heat pump mechanism and the condensation section of the third heat pump mechanism are located in the first cavity.

[0011] In the rotary dehumidification system capable of achieving heat recovery, the first heat pump mechanism includes a first heat exchanger, a second heat exchanger, and a first compressor and a four-way valve electrically connected to the control device respectively, one end of the first heat exchanger is connected to one end of the second heat exchanger or the input end of the compressor through the four-way valve, the output end of the compressor is connected to one end of the second heat exchanger, and the other end of the second heat exchanger is connected to the other end of the first heat exchanger.

[0012] In the rotary dehumidification system capable of achieving heat recovery, the first heat pump mechanism also includes a first temperature sensor, which is arranged on the air outlet side of the first heat exchanger; the rotary dehumidification unit also includes a second temperature sensor, which is arranged on the air outlet side of the cold water coil, and a regulating valve is arranged at the water inlet of the cold water coil, and the first temperature sensor, the second temperature sensor and the regulating valve are electrically connected to the control device respectively.

[0013] In the rotary dehumidification system capable of achieving heat recovery, the second heat pump mechanism includes a first evaporator, a first condenser and a second compressor, the first evaporator is connected to the first condenser through the second compressor; the first evaporator is arranged in the second cavity and is located on the exhaust side of the evaporation section of the third heat pump mechanism; the first condenser is arranged in the first cavity and is located on the inlet side of the condensation section of the third heat pump mechanism, and the second compressor is electrically connected to the control device.

[0014] In the rotary dehumidification system capable of achieving heat recovery, the third heat pump mechanism includes a second evaporator, a second condenser and a third compressor, the second evaporator is connected to the second condenser through the third compressor; the second evaporator is arranged in the second cavity and is located on the air inlet side of the first evaporator; the second condenser is arranged in the first cavity and is located on the air outlet side of the first condenser, and the third compressor is electrically connected to the control device.

[0015] In the rotary dehumidification system capable of realizing heat recovery, the heat recovery device also includes a third temperature sensor and a fourth temperature sensor, the third temperature sensor is arranged on the air outlet side of the first condenser, and the fourth temperature sensor is arranged on the air outlet side of the second condenser; the third temperature sensor and the fourth temperature sensor are electrically connected to the control device respectively.

[0016] In the rotary dehumidification system capable of achieving heat recovery, the first insulation board and the second insulation board have the same structure. The first insulation board includes two fixed plates, and polyurethane foam is filled between the two fixed plates. The two ends of the fixed plate are respectively fixedly connected to the inner walls on both sides of the second shell.

[0017] Beneficial effects:

[0018] The present invention provides a rotary dehumidification system capable of realizing heat recovery. Through the cooperation of a second heat pump mechanism and a third heat pump mechanism, the heat of the regenerated exhaust air can be recovered to perform secondary heating on the regenerated intake air, so that the temperature of the regenerated air input to the rotary dehumidification unit can reach 120°C, thereby meeting the heat and energy consumption requirements of the high-temperature regeneration desorption temperature of the rotary dehumidification unit; at the same time, the first heat pump mechanism can cool down and pre-dehumidify the fresh air intake, thereby saving the cold water consumption of the rotary dehumidification unit; that is, the rotary dehumidification system disclosed in the present application has the advantages of high efficiency, energy saving and reduced consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the rotary dehumidification system provided by the present invention;

[0020] Explanation of the main component symbols: 1-rotary dehumidifier unit, 11-rotary wheel core, 12-regeneration heating box, 13-exhaust fan, 14-cold water coil, 15-first shell, 31-first heat exchanger, 32-second heat exchanger, 33-first compressor, 34-four-way valve, 41-first evaporator, 42-first condenser, 43-second compressor, 51-second evaporator, 52-second condenser, 53-third compressor, 6-second shell, 61-first insulation board, 62-second insulation board. DETAILED DESCRIPTION

[0021] The present invention provides a rotary dehumidification system capable of realizing heat recovery. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and should not be understood as a limitation on the present invention; in addition, the terms "installation", "connection", etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in the present invention according to specific circumstances.

[0023] See also Figure 1 The present invention provides a rotary dehumidification system capable of realizing heat recovery, comprising a control device, a heat recovery device and a rotary dehumidification unit 1, wherein the heat recovery device comprises a first heat pump mechanism, a second heat pump mechanism and a third heat pump mechanism; the first heat exchange section of the first heat pump mechanism is located at the fresh air inlet side of the rotary dehumidification unit 1, the second heat exchange section of the first heat pump mechanism, the evaporation section of the third heat pump mechanism and the evaporation section of the second heat pump mechanism are arranged in sequence along the regeneration exhaust direction of the rotary dehumidification unit 1; the condensation section of the second heat pump mechanism and the condensation section of the third heat pump mechanism are arranged in sequence along the regeneration inlet direction of the rotary dehumidification unit 1; the first heat pump mechanism, the second heat pump mechanism, the third heat pump mechanism and the rotary dehumidification unit 1 are electrically connected to the control device respectively.

[0024] The rotary dehumidification system capable of realizing heat recovery disclosed in the present application can recover the heat of the regenerated exhaust air to perform secondary heating of the regenerated intake air through the cooperation of the second heat pump mechanism and the third heat pump mechanism, so that the temperature of the regenerated air input to the rotary dehumidification unit 1 can reach 120°C, meeting the heat energy consumption demand of the high-temperature regeneration desorption temperature of the rotary dehumidification unit 1; at the same time, the first heat pump mechanism can cool down and pre-dehumidify the fresh air intake, saving the cold water consumption of the rotary dehumidification unit 1; that is, the rotary dehumidification system disclosed in the present application has the advantages of high efficiency, energy saving and reduced consumption.

[0025] Furthermore, the rotary dehumidifier unit 1 includes a first shell 15, in which a rotary wheel core 11 and a regeneration heating box 12 are arranged, an air valve is arranged on the fresh air inlet side of the first shell 15, and an exhaust fan 13 is arranged on the regeneration exhaust side of the first shell 15; the regeneration heating box 12 is arranged on the regeneration inlet side of the rotary wheel core 11, and is used to further heat the regeneration intake air of the rotary wheel core 11; the air valve, the exhaust fan 13 and the regeneration heating box 12 are electrically connected to the control device respectively.

[0026] In this embodiment, the wheel core 11 serves as the core component of the unit, and a regeneration heating box 12 is provided on its regeneration air inlet side, which can significantly improve the dehumidification efficiency of the regeneration air in the regeneration area of ​​the wheel core 11, ensuring that the wheel core 11 can work in the best state during the dehumidification process; an air valve is provided on the fresh air inlet side of the first shell 15, which is used to adjust the amount of fresh air entering the rotary dehumidifier unit 1, ensuring that the dehumidified air output by the rotary dehumidifier unit 1 can meet the air supply volume requirement and the positive pressure requirement of the use environment; an exhaust fan 13 is provided on the regeneration exhaust side to ensure the air circulation inside the rotary dehumidifier unit 1, and timely discharge the hot and humid air generated in the regeneration process, so as to maintain a dry and suitable working environment inside the unit.

[0027] Furthermore, a cold water coil 14 is further disposed in the first shell 15 , and the cold water coil 14 is disposed on the air outlet side of the air valve.

[0028] In this embodiment, a cold water coil 14 is arranged on the air outlet side of the air valve, and the heat in the fresh air intake is absorbed by circulating cold water to reduce the air temperature, thereby achieving the air dehumidification effect, that is, before the fresh air intake enters the rotary wheel core 11, the fresh air intake is further dehumidified; further, when it is in summer and transition season, the fresh air intake is first cooled and dehumidified by the first evaporator 41 in the first refrigeration cycle, and then the pre-treated fresh air intake is input into the rotary dehumidification unit 1, which plays a role of supplementing or replacing the cold water coil 14 in the rotary dehumidification unit 1, reducing the consumption of chilled water of the rotary dehumidification unit 1, and achieving energy-saving effect.

[0029] Furthermore, the heat recovery device includes a second shell 6, in which a first cavity, a second cavity and a third cavity are distributed in sequence from top to bottom; the first cavity and the second cavity are separated by a first insulation board 61, and the second cavity and the third cavity are separated by a second insulation board 62; the first heat exchange section of the first heat pump mechanism is located in the third cavity, the second heat exchange section of the first heat pump mechanism, the evaporation section of the third heat pump mechanism and the evaporation section of the second heat pump mechanism are located in the second cavity; the condensation section of the second heat pump mechanism and the condensation section of the third heat pump mechanism are located in the first cavity.

[0030] In this embodiment, the second shell 6 has a multi-cavity structure, so that the heat recovery device can perform heat exchange in different stages in different cavities, thereby improving the heat exchange efficiency; and different cavities are separated by the first insulation plate 61 and the second insulation plate 62, which effectively isolates the heat, avoids heat cross interference, and improves the stability and reliability of the heat recovery device during operation.

[0031] Furthermore, the first heat pump mechanism includes a first heat exchanger 31, a second heat exchanger 32, and a first compressor 33 and a four-way valve 34 electrically connected to the control device respectively, one end of the first heat exchanger 31 is connected to one end of the second heat exchanger 32 or the input end of the compressor through the four-way valve 34, the output end of the compressor is connected to one end of the second heat exchanger 32, and the other end of the second heat exchanger 32 is connected to the other end of the first heat exchanger 31.

[0032] In this embodiment, the control device can adjust the conduction relationship of the four-way valve 34 according to the external ambient temperature. When it is in summer or transition season, the first heat exchanger 31 serves as the evaporation section, the second heat exchanger 32 serves as the condensation section, and the first heat exchanger 31 is connected to the second heat exchanger 32 through the four-way valve 34 and the compressor; when it is in winter, the first heat exchanger 31 serves as the condensation section, the second heat exchanger 32 serves as the evaporation section, and the first heat exchanger 31 is connected to the second heat exchanger 32 through the four-way valve 34; by setting the four-way valve 34, the refrigerant flow direction between the first heat exchanger 31 and the second heat exchanger 32 is adjusted in different seasons, so that the heat pump recovery device can operate continuously for a long time throughout the year, thereby improving the stability and reliability of the heat pump recovery device during operation.

[0033] Furthermore, the first heat pump mechanism also includes a first temperature sensor, which is arranged on the air outlet side of the first heat exchanger 31; the rotary dehumidifier unit 1 also includes a second temperature sensor, which is arranged on the air outlet side of the cold water coil 14, and a regulating valve is provided at the water inlet of the cold water coil 14. The first temperature sensor, the second temperature sensor and the regulating valve are electrically connected to the control device respectively.

[0034] In this embodiment, the first temperature sensor is used to obtain the outlet air temperature of the first heat exchanger 31 to monitor the operating temperature of the first heat exchanger 31; the second temperature sensor is arranged on the outlet air side of the cold water coil 14 to detect the operating temperature of the cold water coil 14; the control device can dynamically adjust the opening size of the regulating valve according to the real-time outlet air temperature detected by the first temperature sensor and the second temperature sensor, so as to accurately control the dehumidification effect of the cold water coil 14, ensure that the humidity of the indoor air reaches the predetermined standard, thereby maintaining the comfort and suitability of the indoor environment.

[0035] Furthermore, the second heat pump mechanism includes a first evaporator 41, a first condenser 42 and a second compressor 43, the first evaporator 41 is connected to the first condenser 42 through the second compressor 43; the first evaporator 41 is arranged in the second cavity and is located on the exhaust side of the evaporation section of the third heat pump mechanism; the first condenser 42 is arranged in the first cavity and is located on the inlet side of the condensation section of the third heat pump mechanism, and the second compressor 43 is electrically connected to the control device.

[0036] Furthermore, the third heat pump mechanism includes a second evaporator 51, a second condenser 52 and a third compressor 53, the second evaporator 51 is connected to the second condenser 52 through the third compressor 53; the second evaporator 51 is arranged in the second cavity and is located on the air inlet side of the first evaporator 41; the second condenser 52 is arranged in the first cavity and is located on the air outlet side of the first condenser 42, and the third compressor 53 is electrically connected to the control device.

[0037] In this embodiment, the first compressor 33, the second compressor 43 and the third compressor 53 may be fixed frequency / variable frequency screw compressors, fixed frequency / variable frequency scroll compressors or magnetically suspended centrifugal compressors.

[0038] Furthermore, the heat recovery device also includes a third temperature sensor and a fourth temperature sensor, the third temperature sensor is arranged on the air outlet side of the first condenser 42, and the fourth temperature sensor is arranged on the air outlet side of the second condenser 52; the third temperature sensor and the fourth temperature sensor are electrically connected to the control device respectively.

[0039] In this embodiment, a heating element is provided in the regeneration heating box 12, and the regeneration heating box 12 further heats the regeneration intake air based on the principle of electric heating. The control device can dynamically adjust the working states of the second compressor 43, the third compressor 53 and the regeneration heating box 12 based on the preset regeneration air desorption temperature requirement according to the real-time outlet air temperature of the first condenser 42 detected by the third temperature sensor and the real-time outlet air temperature of the second condenser 52 detected by the fourth temperature sensor, and the PID algorithm, so as to accurately control the temperature of the regeneration air at the output end of the regeneration heating box 12, ensure that the dehumidification effect of the regeneration intake air on the impeller core 11 reaches the predetermined standard, and improve the stability and reliability of the impeller core 11 during operation.

[0040] Furthermore, the first heat insulation board 61 and the second heat insulation board 62 have the same structure. The first heat insulation board 61 includes two fixing plates. Polyurethane foam is filled between the two fixing plates. Both ends of the fixing plates are fixedly connected to the inner walls of both sides of the second shell 6 respectively.

[0041] In this embodiment, the first insulation plate 61 is composed of two fixed plates, and a layer of high-efficiency polyurethane foam is sandwiched between the two fixed plates. The formed insulation barrier can ensure the normal cooling and pre-dehumidification process of the fresh air intake, the heat recovery process of the regenerated exhaust air, and the heating process of the regenerated air intake, thereby improving the stability and reliability of the heat recovery device during operation.

[0042] The rotary dehumidification system capable of realizing heat recovery disclosed in the present application has the following working modes:

[0043] When it is summer or transition season, the first heat pump mechanism is put into use. At this time, the first heat exchanger 31 is the evaporator and the second heat exchanger 32 is the condenser; the fresh air intake first passes through the first heat exchanger 31 for cooling and dehumidification treatment, saving the chilled water consumption of the cold water coil 14 of the rotary dehumidifier unit 1; the pre-dehumidified fresh air intake then enters the cold water coil 14 of the rotary dehumidifier unit 1 for further treatment, and then enters the rotary wheel core 11 for deep dehumidification treatment; the regeneration exhaust waste heat is heated by the second heat exchanger 32 to provide a heat exchange heat source for the second evaporator 51 of the third heat pump mechanism, ensuring that the third heat pump mechanism can operate normally for heat exchange; the high-temperature and high-humidity regeneration exhaust air output by the regeneration exhaust fan 13 passes through the first heat pump mechanism After the second heat exchanger 32 and the second evaporator 51 of the third heat pump mechanism, it enters the first evaporator 41 of the second heat pump mechanism for heat exchange and cooling, which not only recycles the waste heat of the regenerated exhaust air, but also ensures that the third heat pump mechanism and the second heat pump mechanism can operate normally for heat exchange; the regenerated intake air first passes through the first condenser 42 of the second heat pump mechanism to heat up, and then goes to the second condenser 52 of the third heat pump mechanism to heat up again, so that the regenerated intake air temperature reaches 120°C, and then goes to the regeneration reheat box to heat up to 130°C~140°C, which can meet the regeneration conditions of high-temperature desorption of the wheel core 11, saving most of the steam consumption or electric heating power consumption for the regeneration heating energy consumption of the rotary dehumidifier unit 1.

[0044] In winter, since the temperature and humidity of the incoming fresh air are relatively low, there is no need to cool and dehumidify the incoming fresh air. At this time, the first heat exchanger 31 is a condenser and the second heat exchanger 32 is an evaporator. In the initial stage, the first heat pump mechanism and the third heat pump mechanism are put into use, and the second heat pump mechanism does not work. The first heat exchanger 31 provides heat for the incoming fresh air to heat up the air, so that the incoming air temperature reaches the optimal state of the processing capacity of the impeller core 11, saving the power consumption or steam consumption of the electric heating of the incoming fresh air. The regenerated exhaust air passes through the second heat exchanger 32 and then passes through the third heat pump mechanism. The second evaporator 51 performs heat exchange recovery, and the second condenser 52 of the third heat pump mechanism heats the regenerated intake air, saving the steam consumption or electric heating power consumption of the regenerated heating energy; when the heat exchange amount of the second condenser 52 of the third heat pump mechanism cannot meet the regenerated heating demand, the second heat pump mechanism is controlled to start working, the first condenser 42 of the second heat pump mechanism heats the regenerated intake air, and then the second condenser 52 of the third heat pump mechanism continues to heat it, and at the same time, the first evaporator 41 and the second evaporator 51 cool the regenerated exhaust air for heat recovery.

[0045] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A rotary dehumidification system capable of realizing heat recovery, characterized in that: It includes a control device, a heat recovery device and a rotary dehumidifier unit, the heat recovery device includes a first heat pump mechanism, a second heat pump mechanism and a third heat pump mechanism; the first heat exchange section of the first heat pump mechanism is located at the fresh air inlet side of the rotary dehumidifier unit, the second heat exchange section of the first heat pump mechanism, the evaporation section of the third heat pump mechanism and the evaporation section of the second heat pump mechanism are arranged in sequence along the regeneration exhaust direction of the rotary dehumidifier unit; the condensation section of the second heat pump mechanism and the condensation section of the third heat pump mechanism are arranged in sequence along the regeneration inlet direction of the rotary dehumidifier unit; the first heat pump mechanism, the second heat pump mechanism, the third heat pump mechanism and the rotary dehumidifier unit are electrically connected to the control device respectively.

2. A rotary dehumidification system capable of realizing heat recovery according to claim 1, characterized in that: The rotary dehumidifier unit includes a first shell, in which a rotary wheel core and a regeneration heating box are arranged, an air valve is arranged on the fresh air inlet side of the first shell, and an exhaust fan is arranged on the regeneration exhaust side of the first shell; the regeneration heating box is arranged on the regeneration inlet side of the rotary wheel core, and is used to further heat the regeneration inlet air of the rotary wheel core; the air valve, the exhaust fan and the regeneration heating box are electrically connected to the control device respectively.

3. A rotary dehumidification system capable of realizing heat recovery according to claim 2, characterized in that: A cold water coil is also arranged in the first shell, and the cold water coil is arranged on the air outlet side of the air valve.

4. A rotary dehumidification system capable of realizing heat recovery according to claim 3, characterized in that: The heat recovery device includes a second shell, in which a first cavity, a second cavity and a third cavity are distributed in sequence from top to bottom; the first cavity and the second cavity are separated by a first heat insulation board, and the second cavity and the third cavity are separated by a second heat insulation board; the first heat exchange section of the first heat pump mechanism is located in the third cavity, the second heat exchange section of the first heat pump mechanism, the evaporation section of the third heat pump mechanism and the evaporation section of the second heat pump mechanism are located in the second cavity; the condensation section of the second heat pump mechanism and the condensation section of the third heat pump mechanism are located in the first cavity.

5. A rotary dehumidification system capable of realizing heat recovery according to claim 4, characterized in that: The first heat pump mechanism includes a first heat exchanger, a second heat exchanger, and a first compressor and a four-way valve electrically connected to the control device respectively, one end of the first heat exchanger is connected to one end of the second heat exchanger or the input end of the compressor through the four-way valve, the output end of the compressor is connected to one end of the second heat exchanger, and the other end of the second heat exchanger is connected to the other end of the first heat exchanger.

6. A rotary dehumidification system capable of realizing heat recovery according to claim 5, characterized in that: The first heat pump mechanism also includes a first temperature sensor, which is arranged on the air outlet side of the first heat exchanger; the rotary dehumidifier unit also includes a second temperature sensor, which is arranged on the air outlet side of the cold water coil, and a regulating valve is arranged at the water inlet of the cold water coil. The first temperature sensor, the second temperature sensor and the regulating valve are electrically connected to the control device respectively.

7. A rotary dehumidification system capable of realizing heat recovery according to claim 4, characterized in that: The second heat pump mechanism includes a first evaporator, a first condenser and a second compressor, the first evaporator is connected to the first condenser through the second compressor; the first evaporator is arranged in the second cavity and is located on the exhaust side of the evaporation section of the third heat pump mechanism; the first condenser is arranged in the first cavity and is located on the inlet side of the condensation section of the third heat pump mechanism, and the second compressor is electrically connected to the control device.

8. A rotary dehumidification system capable of realizing heat recovery according to claim 7, characterized in that: The third heat pump mechanism comprises a second evaporator, a second condenser and a third compressor, wherein the second evaporator is connected to the second condenser via the third compressor; the second evaporator is arranged in the second cavity and is located at the air inlet side of the first evaporator; The second condenser is disposed in the first cavity and is located at the air outlet side of the first condenser. The third compressor is electrically connected to the control device.

9. A rotary dehumidification system capable of realizing heat recovery according to claim 8, characterized in that: The heat recovery device also includes a third temperature sensor and a fourth temperature sensor, the third temperature sensor is arranged on the air outlet side of the first condenser, and the fourth temperature sensor is arranged on the air outlet side of the second condenser; the third temperature sensor and the fourth temperature sensor are electrically connected to the control device respectively.

10. The rotary dehumidification system capable of realizing heat recovery according to claim 4, characterized in that: The first heat insulation board and the second heat insulation board have the same structure. The first heat insulation board includes two fixing plates. Polyurethane foam is filled between the two fixing plates. Both ends of the fixing plates are fixedly connected to the inner walls of both sides of the second shell respectively.

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