Rotary dehumidification system and method based on heat pump system

Abstract

The invention discloses a rotating wheel dehumidification system and method based on a heat pump system, and relates to the technical field of deep dehumidification. The rotating wheel dehumidification system based on the heat pump system comprises a heat pump subsystem, a rotating wheel dehumidification subsystem and an adjusting subsystem; the heat pump subsystem comprises an evaporator, a compressor, a condenser, a subcooler and a first throttling device which are connected in sequence, and a precooler is further arranged on a branch between the compressor and the condenser; wherein a solar device is further arranged between the subcooler and the rotating wheel regeneration module, and the solar device is used for collecting solar energy and increasing the temperature of air entering the rotating wheel regeneration area. According to the technical scheme, the problems that energy consumption in the regeneration process of traditional rotating wheel dehumidification accounts for the total energy consumption of the system, the temperature of waste gas exhausted in the regeneration process is high, but waste heat is not effectively utilized, a seasonal mode switching mechanism is lacked, different working condition requirements in winter and summer cannot be dynamically met, and the energy consumption is low can be solved. The energy efficiency of the unit is reduced, and the energy consumption is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of deep dehumidification, and in particular to a rotary dehumidification system and method based on a heat pump system. Background Art

[0002] Rotary dehumidification is a deep dehumidification technology that mainly reduces air humidity by absorbing moisture in the air through hygroscopic materials (such as silica gel, molecular sieves, etc.). Its core component is a rotor coated with hygroscopic materials. The rotor rotates alternately between processing air and regenerating air to achieve continuous dehumidification; rotary dehumidification includes adsorption process and regeneration process. During the adsorption process, humid air passes through the adsorption area of ​​the rotor, and the hygroscopic material absorbs moisture in the air to dry the air. During the regeneration process, the rotor rotates to the regeneration area and is heated by high-temperature air (usually 120~250℃) to release the adsorbed moisture of the hygroscopic material, discharge high-humidity exhaust gas, and restore the dehumidification capacity of the rotor. Rotary dehumidification can reduce air humidity to extremely low levels (such as below 10%RH), which is suitable for scenes with extremely high humidity requirements; it is not limited by ambient temperature and humidity, and can work effectively even under low temperature and high humidity conditions.

[0003] The energy consumption of the regeneration process of traditional rotary dehumidifiers accounts for a large proportion of the total energy consumption of the system. The exhaust gas discharged during the regeneration process has a high temperature, but the waste heat is not effectively utilized. There is a lack of seasonal mode switching mechanism and it is unable to dynamically adapt to different operating conditions in winter and summer, resulting in reduced unit energy efficiency and increased energy consumption. Summary of the invention

[0004] The main purpose of the present invention is to propose a rotary dehumidification system and method based on a heat pump system, which aims to solve the problem that the energy consumption of the regeneration process of the traditional rotary dehumidification accounts for a large proportion of the total energy consumption of the system, the exhaust gas temperature discharged during the regeneration process is high, but the waste heat is not effectively utilized, and there is a lack of seasonal mode switching mechanism, which cannot dynamically adapt to the different operating conditions in winter and summer, resulting in reduced energy efficiency and increased energy consumption of the unit.

[0005] To achieve the above-mentioned purpose, the present invention proposes a rotary dehumidification system based on a heat pump system, comprising a heat pump subsystem, a rotary dehumidification subsystem and a regulating subsystem, wherein the heat pump subsystem comprises an evaporator, a compressor, a condenser, a subcooler and a first throttling device connected in sequence, and a precooler is also provided in the branch between the compressor and the condenser; the rotary dehumidification subsystem comprises a rotary regeneration module and a rotary adsorption module, the rotary adsorption module is used to adsorb moisture in the air at the condenser, the rotary regeneration module can absorb heat from the air heated by the refrigerant in the subcooler, and dry the moisture adsorbed by the rotary adsorption module; the regulating subsystem is used to regulate the flow rate of the refrigerant in the heat pump subsystem; wherein a solar energy device is also provided between the subcooler and the rotary regeneration module, and the solar energy device is used to collect solar energy and use it to increase the temperature of air entering the rotary regeneration zone.

[0006] In one embodiment, a fan and a heat pipe heat exchanger are provided between the rotor regeneration module and the evaporator, and the fan can recycle the exhaust air of the rotor regeneration module to the heat pipe heat exchanger to preheat the fresh air and transmit the preheated fresh air to the evaporator.

[0007] In one embodiment, the rotary dehumidification subsystem further includes a water spraying device, which is disposed on the condenser and is used to humidify indoor return air.

[0008] In one embodiment, the heat pump subsystem includes a first branch, a second branch and a third branch, the first branch connecting the branch between the evaporator and the compressor and the branch between the subcooler and the condenser; the second branch connecting the branch between the subcooler and the first throttling device and the branch between the evaporator and the compressor; the third branch connecting the branch between the subcooler and the condenser and the branch between the first throttling device and the evaporator.

[0009] In one embodiment, the regulating subsystem includes a first valve, a second valve, a third valve and a fourth valve, the first valve and the second valve are located at two ends of the first branch, the third valve is located at one end of the second branch close to the subcooler, and the fourth valve is located at one end of the third branch close to the evaporator.

[0010] In one embodiment, the heat pump subsystem includes a fourth branch and a fifth branch, the fourth branch connecting the branch between the subcooler and the first throttling device and the branch between the compressor and the condenser; the fifth branch connecting the branch between the evaporator and the compressor and the branch between the compressor and the condenser.

[0011] In one embodiment, the regulating subsystem includes a fifth valve and a sixth valve, the fifth valve is located at an end of the fourth branch close to the compressor, and the sixth valve is located at an end of the fifth branch close to the condenser.

[0012] In one embodiment, the heat pump subsystem further includes a sixth branch, wherein the sixth branch is located between the condenser and the subcooler, and the sixth branch is provided with a second throttling device.

[0013] In one embodiment, a seventh valve and an eighth valve are provided at both ends of the sixth branch, the seventh valve is located at one end of the sixth branch close to the condenser, and the eighth valve is located at one end of the sixth branch close to the subcooler.

[0014] The present invention also proposes a rotary dehumidification method, which is applied to a rotary dehumidification system based on a heat pump system, characterized in that the rotary dehumidification system based on the heat pump system comprises: a heat pump subsystem, a rotary dehumidification subsystem, an evaporator, a compressor, a condenser, a supercooler, a first throttling device, a water spraying device, a first valve, a second valve, a heat pipe heat exchanger, a precooler and a solar device; The rotary dehumidification method comprises the following steps: In the first mode, the refrigerant is controlled to circulate in the heat pump subsystem, and the refrigerant flows through the evaporator, the compressor, the condenser, the subcooler and the first throttling device in sequence; When frost occurs on the evaporator, the openings of the first valve and the second valve are controlled so that the high-temperature refrigerant does not pass through the cooler but directly passes through the evaporator for defrosting. At this time, the evaporator performs a condensing operation, and then the refrigerant flows back to the subcooler. At this time, the subcooler performs an evaporating operation, and the refrigerant flows through the constant pressure valve and enters the compressor for compression to complete the cycle; When the heat pump subsystem is in operation, the condenser and the water spray device are controlled to heat and humidify the indoor return air; Control the indoor return air after the heating and humidification process to flow into the rotary adsorption module for dehumidification and then be sent into the air supply duct; When the heat pump subsystem is in operation, the outdoor fresh air is controlled to pass through the cooler for heat exchange and then further heated by the solar device; Passing the heated outdoor fresh air into the rotary wheel regeneration module for dehumidification; Controlling the recovery of the wind exhausted from the rotary regeneration module and entering the heat pipe heat exchanger to perform heat exchange with the outdoor fresh air entering the evaporator; In the second mode, the refrigerant is controlled to circulate in the heat pump subsystem, and the refrigerant flows through the condenser, the precooler, the compressor, the subcooler and the second throttling device in sequence, wherein the precooler is arranged in parallel with the condenser; When the heat pump subsystem is in operation, the condenser and the precooler are in evaporation mode, and the condenser and the precooler are controlled to cool outdoor fresh air; The outdoor fresh air cooled by the condenser enters the rotary adsorption module for dehumidification, and then is mixed with the outdoor fresh air cooled by the precooler and sent into the air supply duct; Controlling the supercooler and the solar device to heat outdoor fresh air; The heated outdoor fresh air is introduced into the rotary wheel regeneration module for dehumidification.

[0015] The technical solution of the present invention provides a rotary dehumidification system based on a heat pump system. Through the coordinated work of the heat pump subsystem and the rotary dehumidification subsystem, efficient dehumidification and energy recovery are achieved, the energy consumption of the regeneration process is greatly reduced, and the overall energy efficiency of the system is improved. When the system is running, the refrigerant in the heat pump subsystem flows through the evaporator, compressor, condenser, subcooler and throttling device in sequence to achieve efficient heat transfer. The heat released by the condenser is transferred to the rotary regeneration module through the subcooler to provide a heat source for the rotary regeneration. At the same time, the solar energy collected by the solar device further increases the temperature of the regenerated air, ensuring that the rotary adsorption module can efficiently release moisture and restore the dehumidification capacity during the regeneration process. The use of solar energy devices to assist in heating the regenerated air reduces dependence on traditional energy sources, reduces operating costs and carbon emissions, and has good economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of an embodiment of a rotary dehumidification system based on a heat pump system provided by the present invention; Figure 2 A schematic structural diagram of another embodiment of a rotary dehumidification system based on a heat pump system provided by the present invention; Figure 3 A schematic structural diagram of another embodiment of a rotary dehumidification system based on a heat pump system provided by the present invention; Figure 4 A step diagram of the dehumidification method provided by the present invention in the first mode; Figure 5 This is a step diagram of the dehumidification method provided by the present invention in the second mode.

[0018] Description of Figure Numbers: 100. A rotary dehumidification system based on a heat pump system; 1. a heat pump subsystem; 11. an evaporator; 12. a compressor; 13. a condenser; 14. a subcooler; 15. a first throttling device; 16. a precooler; 2. a rotary dehumidification subsystem; 21. a rotary regeneration module; 22. a rotary adsorption module; 4. a solar energy device; 5. a fan; 6. a heat pipe heat exchanger; 23. a water spraying device; a. a first branch; b. a second branch; c. a third branch; 1v. a first valve; 2v. a second valve; 3v. a third valve; 4v. a fourth valve; 5v. a fifth valve; d. a fourth branch; e. a fifth branch; 6v. a sixth valve; f. a sixth branch; 7. a second throttling device; 7v. a seventh valve; 8v. a eighth valve.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The present invention proposes a rotary dehumidification system 100 based on a heat pump system.

[0024] See also Figures 1 to 3 In one embodiment of the present invention, a rotary dehumidification system 100 based on a heat pump system includes a heat pump subsystem 1, a rotary dehumidification subsystem 2 and a regulating subsystem, wherein the heat pump subsystem 1 includes an evaporator 11, a compressor 12, a condenser 13, a subcooler 14 and a first throttling device 15 connected in sequence, and a precooler 16 is also provided in the branch between the compressor 12 and the condenser 13; the rotary dehumidification subsystem 2 includes a rotary regeneration module 21 and a rotary adsorption module 22, wherein the rotary adsorption module 22 is used to adsorb moisture in the air at the condenser 13, and the rotary regeneration module can absorb the heat of the air heated by the refrigerant in the subcooler 14, and dry the moisture adsorbed by the rotary adsorption module 22; the regulating subsystem is used to adjust the flow rate of the refrigerant in the heat pump subsystem 1; wherein a solar energy device 4 is also provided between the subcooler 14 and the rotary regeneration module 21, and the solar energy device 4 is used to collect solar energy and use it to increase the air temperature entering the rotary regeneration zone.

[0025] In one embodiment of the present invention, a rotary dehumidification system 100 based on a heat pump system realizes efficient dehumidification and energy recovery through the coordinated operation of each subsystem. Specifically, the refrigerant in the heat pump subsystem 1 flows through the evaporator 11, the compressor 12, the condenser 13, the subcooler 14 and the first throttling device 15 in sequence to complete the transfer and recovery of heat. The air is heated at the condenser 13 and then enters the rotary adsorption module 22, where the moisture therein is adsorbed by the hygroscopic material. At the same time, the heat generated by the subcooler 14 is transferred to the rotary regeneration module 21 after auxiliary heating by the solar device 4, and is used to dry the moisture adsorbed by the hygroscopic material in the adsorption module. The solar device 4 collects solar energy to further increase the temperature of the air entering the rotary regeneration zone and enhance the regeneration efficiency. The regulating subsystem dynamically adjusts the refrigerant flow according to the system operating conditions to ensure that the heat exchange and dehumidification process between the heat pump subsystem 1 and the rotary dehumidification subsystem 2 are optimally matched, so as to achieve efficient and stable operation of the system. This embodiment achieves deep dehumidification and efficient energy recovery by organically combining the heat pump subsystem 1 with the rotary dehumidification subsystem 2 and introducing a solar energy device 4 for auxiliary heating. On the one hand, the heat pump subsystem 1 is used to recover the waste heat of the condenser 13, which is transferred to the rotary regeneration module 21 through the subcooler 14 to provide a heat source for the rotary regeneration, effectively reducing the energy consumption of the regeneration process; on the other hand, the introduction of the solar energy device 4 further increases the temperature of the regenerated air, reduces the dependence on external energy, and enhances the energy-saving effect of the system. At the same time, the dynamic adjustment of the refrigerant flow by the regulating subsystem enables the system to flexibly adjust the operating state according to different working conditions, ensuring the stability of the dehumidification effect and the high efficiency of the system, thereby significantly improving the overall energy efficiency and environmental adaptability of the system while reducing the operating cost.

[0026] In one embodiment of the present invention, see Figure 1 and Figure 2 A fan 5 and a heat pipe heat exchanger 6 are provided between the rotor regeneration module 21 and the evaporator 11. The fan 5 can recycle the exhaust air of the rotor regeneration module to the heat pipe heat exchanger 6 to preheat the fresh air and transmit the preheated fresh air to the evaporator 11.

[0027] In this embodiment, a fan 5 and a heat pipe heat exchanger 6 are arranged between the rotor regeneration module 21 and the evaporator 11. During operation, the fan 5 recovers the high-temperature exhaust air discharged from the rotor regeneration module 21 and transmits it to the heat pipe heat exchanger 6. In the heat pipe heat exchanger 6, the high-temperature exhaust air exchanges heat with the low-temperature fresh air of the evaporator 11, and the heat of the exhaust air is transferred to the fresh air of the evaporator 11. The outdoor fresh air sent to the evaporator 11 in winter is preheated by the heat pipe heat exchanger 6, which not only reduces the risk of frost on the surface of the device due to too low air temperature, ensures the operating performance of the system, but also reduces the operating energy consumption of the system. By arranging the fan 5 and the heat pipe heat exchanger 6 between the rotor regeneration module 21 and the evaporator 11, the present invention realizes the effective recovery and utilization of the regenerated waste heat. This design not only avoids the frosting problem of the evaporator 11 caused by the low-temperature fresh air, prolongs the service life of the equipment, but also improves the overall energy efficiency of the system. At the same time, the regenerated waste heat is used to preheat the fresh air of the evaporator 11, which reduces the system's demand for external heating energy, reduces operating costs, and enhances the economy and environmental friendliness of the system.

[0028] In one embodiment of the present invention, see Figure 1 The rotary dehumidification subsystem 2 also includes a water spraying device 23, which is disposed on the condenser 13 and is used to humidify the indoor return air.

[0029] In one embodiment, the rotary dehumidification subsystem 2 further includes a water spray device 23, which is installed at the condenser 13. During winter operation, the refrigerant is compressed by the compressor 12 and sent to the condenser 13, releasing heat to heat the humidified return air, so that the temperature reaches 25°C and the relative humidity reaches 90%. After being dehumidified and heated by the rotary adsorption module 22, the wind with a higher temperature is supplied to the terminal for use; the condenser 13 and the water spray device 23 heat and humidify the indoor return air, and the step of the water spray device 23 humidifying the return air improves the utilization efficiency and energy efficiency of the rotary system in winter, realizes that higher-grade temperature heat can be obtained for free in winter, realizes full utilization of energy, reduces the condensation temperature of the heat pump unit, and improves the energy efficiency of the system.

[0030] In one embodiment of the present invention, see Figure 1The heat pump subsystem 1 includes a first branch a, a second branch b and a third branch c. The first branch a connects the branch between the evaporator 11 and the compressor 12 with the branch between the subcooler 14 and the condenser 13; the second branch b connects the branch between the subcooler 14 and the first throttling device 15 with the branch between the evaporator 11 and the compressor 12; the third branch c connects the branch between the subcooler 14 and the condenser 13 with the branch between the first throttling device 15 and the evaporator 11.

[0031] In this embodiment, the heat pump subsystem 1 realizes efficient flow and heat exchange of refrigerant between different components by setting the first branch a, the second branch b and the third branch c. Specifically, during winter operation, the first branch a connects the branch between the evaporator 11 and the compressor 12 and the branch between the subcooler 14 and the condenser 13. Through the third branch c, the refrigerant used for defrosting does not pass through the cooler 14, but directly passes through the evaporator 11 to release heat. Then the refrigerant can flow back to the subcooler 14 through the first branch a, and finally flows through the second branch b to the constant pressure valve, and then flows into the compressor 12. The second branch b connects the branch between the cooler 14 and the first throttling device 15 and the branch between the evaporator 11 and the compressor 12, and the third branch c connects the branch between the cooler 14 and the condenser 13 and the branch between the first throttling device 15 and the evaporator 11, providing a backup path for the refrigerant, ensuring that the system can flexibly adjust the flow direction of the refrigerant under different working conditions, and further improving the stability and energy efficiency of the system. By setting the first, second and third branches c, the heat pump subsystem 1 of the present invention can realize multi-path flow of refrigerant and efficient heat recovery and utilization. This multi-branch design not only improves the flexibility and adaptability of the system, enabling it to flexibly adjust the flow direction of the refrigerant according to different working conditions, but also significantly improves the energy efficiency of the system.

[0032] In one embodiment of the present invention, see Figure 2 The regulating subsystem includes a first valve 1v, a second valve 2v, a third valve 3v and a fourth valve 4v. The first valve 1v and the second valve 2v are located at both ends of the first branch a, the third valve 3v is located at one end of the second branch b close to the subcooler 14, and the fourth valve 4v is located at one end of the third branch c close to the evaporator 11.

[0033] In one embodiment, the regulating subsystem realizes flexible allocation of refrigerant flow by precisely controlling the valves in each branch. Specifically, the first valve 1v and the second valve 2v are respectively installed at the two ends of the first branch a, and are used to control the flow of refrigerant between the evaporator 11 and the subcooler 14; the third valve 3v is located at one end of the second branch b close to the subcooler 14, and adjusts the refrigerant distribution between the subcooler 14 and the evaporator 11, so that during the defrosting process, adjusting the opening of the third valve 3v can allow the refrigerant to flow to the compressor through the constant pressure valve; the fourth valve 4v is installed at one end of the third branch c close to the evaporator 11, and manages the refrigerant reflux between the subcooler 14 and the evaporator 11. During winter operation, when the evaporator 11 is frosted, the flow direction of the refrigerant is changed by regulating the first valve 1v, the second valve 2v, the third valve 3v and the fourth valve 4v, so that the high-temperature refrigerant from the condenser 13 does not pass through the cooler 14, but directly passes through the evaporator 11 for defrosting. At this time, the evaporator 11 is in a condensing state, and then the refrigerant flows back to the subcooler 14. At this time, the subcooler 14 is in an evaporating state, and then the refrigerant is sent to the compressor 12 for compression to complete the cycle after the pressure is balanced by the constant pressure valve. At this time, the flow direction of the refrigerant is condenser 13, first valve 1v, third branch c, evaporator 11, second valve 2v, first branch a, first valve 1v, subcooler 14, third valve 3v, second branch b, compressor 12, and finally the cycle is completed. Through the coordinated operation of these valves, the system can dynamically adjust the refrigerant flow of each branch according to different operating conditions, ensuring that the heat pump subsystem 1 can operate efficiently under various conditions, thereby optimizing the performance of the entire rotary dehumidification system. This design not only improves the flexibility and adaptability of the system, enabling it to quickly adjust the distribution of refrigerant according to different working conditions, but also significantly improves the energy efficiency and stability of the system. For example, when operating at high load, by reasonably adjusting the opening of each valve, it can ensure that the refrigerant flows efficiently between various components to avoid local overload or shortage; when operating at low load or partial load, the flow rate can be flexibly adjusted to reduce unnecessary energy consumption. In addition, this fine flow control also helps to extend the service life of the equipment, reduce maintenance costs, and enhance the overall reliability and economy of the system.

[0034] In one embodiment of the present invention, see Figures 1 to 3The heat pump subsystem 1 includes a fourth branch d and a fifth branch e. ​​The fourth branch d connects the branch between the subcooler 14 and the first throttling device 15 and the branch between the compressor 12 and the condenser 13; the fifth branch e connects the branch between the evaporator 11 and the compressor 12 and the branch between the compressor 12 and the condenser 13. The regulating subsystem includes a fifth valve 5v and a sixth valve 6v. The fifth valve 5v is located at one end of the fourth branch d close to the compressor 12, and the sixth valve 6v is located at one end of the fifth branch e close to the condenser 13. The heat pump subsystem 1 also includes a sixth branch f. The sixth branch f is located at the branch between the condenser 13 and the subcooler 14. The sixth branch f has a second throttling device 7. A seventh valve 7v and an eighth valve 8v are provided at both ends of the sixth branch f. The seventh valve 7v is located at one end of the sixth branch f close to the condenser 13 , and the eighth valve 8v is located at one end of the sixth branch f close to the subcooler 14 .

[0035] In this embodiment, when operating in summer, the condenser 13 and the precooler 16 perform evaporation operation. After the refrigerant flows through the condenser 13 or the precooler 16, it passes through the sixth valve 6v, flows through the fifth branch e, and is adjusted by the second valve 2v to make the refrigerant flow through the compressor 12, and then returns to the subcooler 14 through the fourth branch d, flows into the sixth branch f, and then passes through the second throttling device 7 between the seventh valve 7v and the eighth valve 8v, and then passes through the condenser 13 and the precooler 16 to complete the cycle.

[0036] The present invention also proposes a rotary dehumidification method, please refer to Figures 1 to 5 , applied to a rotary dehumidification system 100 based on a heat pump system, characterized in that the rotary dehumidification system 100 based on a heat pump system comprises: a heat pump subsystem 1, a rotary dehumidification subsystem 2, an evaporator 11, a compressor 12, a condenser 13, a supercooler 14, a first throttling device 15, a water spraying device 23, a first valve 1v, a second valve 2v, a heat pipe heat exchanger 6, a precooler 16 and a solar device 4; the rotary dehumidification method comprises the following steps: In the first mode, the refrigerant is controlled to circulate in the heat pump subsystem 1, and the refrigerant flows through the evaporator 11, the compressor 12, the condenser 13, the subcooler 14 and the first throttling device 15 in sequence; When frost occurs on the evaporator 11, the openings of the first valve 1v and the second valve 2v are controlled so that the high-temperature refrigerant does not pass through the cooler but directly passes through the evaporator 11 for defrosting. At this time, the evaporator 11 performs a condensing operation, and then the refrigerant flows back to the subcooler 14. At this time, the subcooler 14 performs an evaporating operation. The refrigerant flows through the constant pressure valve and enters the compressor 12 for compression to complete the cycle. When the heat pump subsystem 1 is in operation, the condenser 13 and the water spray device 23 are controlled to heat and humidify the indoor return air; The indoor return air after the temperature increase and humidification process is controlled to flow into the rotary adsorption module 22 for dehumidification and then sent into the air supply duct; When the heat pump subsystem 1 is in operation, the outdoor fresh air is controlled to pass through the cooler for heat exchange, and then further heated by the solar device 4; The heated outdoor fresh air is passed into the rotor regeneration module 21 for dehumidification; Controlling the wind exhausted from the rotor regeneration module 21 to be recovered and enter the heat pipe heat exchanger 6 to exchange heat with the outdoor fresh air entering the evaporator 11; In the second mode, the refrigerant is controlled to circulate in the heat pump subsystem 1, and the refrigerant flows through the condenser 13, the precooler 16, the compressor 12, the subcooler 14 and the second throttling device 7 in sequence, wherein the precooler 16 is arranged in parallel with the condenser 13; When the heat pump subsystem 1 is in operation, the condenser 13 and the precooler 16 perform evaporation operation, and the condenser 13 and the precooler 16 are controlled to cool outdoor fresh air; The outdoor fresh air cooled by the condenser 13 enters the rotary adsorption module 22 for dehumidification, and then is mixed with the outdoor fresh air cooled by the precooler 16 and sent into the air supply duct; Controlling the supercooler 14 and the solar device 4 to heat outdoor fresh air; The heated outdoor fresh air is introduced into the rotor regeneration module 21 for dehumidification.

[0037] The present invention proposes a rotary dehumidification method based on a heat pump system, which realizes efficient dehumidification and energy recovery through seasonal mode switching. The first mode and the second mode are winter mode and summer mode respectively; in the winter mode, the refrigerant flows through the evaporator 11, the compressor 12, the condenser 13, the subcooler 14 and the first throttling device 15 in the heat pump subsystem 1 in sequence to complete the heat transfer and recovery. At this time, the condenser 13 heats the indoor return air, and the heated return air flows into the rotary adsorption module 22 for dehumidification, and then is sent to the air supply duct. At the same time, after the outdoor fresh air passes through the cooler 14 for heat exchange, it is further heated by the solar device 4, and then passes into the rotary regeneration module for dehumidification, and finally flows into the evaporator 11 for heat exchange. In the summer mode, the refrigerant flows through the condenser 13, the compressor 12, the subcooler 14 and the second throttling device 7 in sequence. At this time, the condenser 13 and the precooler 16 operate as the evaporator 11 to cool the outdoor fresh air. The outdoor fresh air cooled by the condenser 13 enters the rotor adsorption module 22 for dehumidification, and then is mixed with the outdoor fresh air cooled by the precooler 16 and sent to the air supply duct. At the same time, the subcooler 14 and the solar device 4 heat the outdoor fresh air, and the heated outdoor fresh air is passed into the rotor regeneration module for dehumidification.

[0038] The present invention realizes efficient dehumidification and energy recovery in winter and summer conditions by switching seasonal modes. In winter mode, the heat of the condenser 13 is used to heat the indoor return air, which significantly increases the supply air temperature. At the same time, the solar energy device 4 further increases the outdoor fresh air, reducing the regeneration energy consumption. Specifically, in winter mode, by utilizing the heating characteristics of the rotary dehumidification, higher-grade temperature heat can be obtained for free, so that the condensation temperature of the heat pump unit is reduced and the system energy efficiency is improved. For example, in Tibet, when the regeneration temperature is 20°C and the ratio of adsorption and regeneration air volume is 1:2, the energy obtained before the use of this system is 0.68kW, and after the use of this system is 0.92kW, the sensible heat obtained by the rotary wheel is increased by 35%.

[0039] In summer mode, the precooler 16 and the condenser 13 are parallel structures, and the flow of the refrigerant can be regulated by adjusting the opening of the valve, so that the distribution ratio of the refrigerant between the precooler 16 and the condenser 13 can be dynamically adjusted according to the actual working conditions to optimize the heat recovery efficiency of the heat pump system and the control accuracy of the indoor air temperature and humidity. For example, when focusing on the sensible heat treatment of air, by increasing the valve opening on the side of the precooler 16, the flow of the refrigerant in the precooler 16 is increased, thereby improving the heat release capacity of the precooler 16. The precooler 16 of the heat pump system preferentially heats the indoor return air, significantly enhancing the processing efficiency of the sensible heat load; at the same time, it reduces the refrigerant flow of the condenser 13 to avoid increasing the operating load of the rotary dehumidification. When focusing on the latent heat treatment of air, more refrigerant is allowed to flow to the condenser 13 by adjusting the valve, thereby enhancing the processing effect of the condenser 13 on the fresh air. When the condenser 13 operates as the evaporator 11, it absorbs the heat of the outdoor fresh air, lowers its temperature and then sends it to the rotary dehumidification system, thereby reducing the latent heat load of the rotary dehumidification; when it is necessary to process sensible heat and latent heat at the same time, it is necessary to adjust the refrigerant distribution ratio of the precooler 16 and the condenser 13 according to different seasons and working conditions to ensure that the sensible heat and latent heat are processed synchronously and efficiently. The condenser 13 and the precooler 16 operate as the evaporator 11, which effectively reduces the temperature of the outdoor fresh air, reduces the latent heat load during the dehumidification process, and improves the cooling efficiency of the system. For example, when the outdoor temperature is about -20°C, the energy efficiency of the ordinary heat pump system is between 2.0-2.5, while the collaborative system optimizes the sensible heat temperature to reduce the system condensation temperature and improve the energy efficiency to between 3-3.5. This design not only improves the overall energy efficiency of the system, but also enhances its adaptability under different seasonal working conditions, reduces operating costs, and has significant economic and environmental benefits.

[0040] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotary dehumidification system based on a heat pump system, characterized in that: include: A heat pump subsystem (1), the heat pump subsystem (1) comprising an evaporator (11), a compressor (12), a condenser (13), a subcooler (14) and a first throttling device (15) connected in sequence, and a branch between the compressor (12) and the condenser (13) is also provided with a precooler (16); A rotary dehumidification subsystem (2), the rotary dehumidification subsystem (2) comprising a rotary regeneration module (21) and a rotary adsorption module (22), the rotary adsorption module (22) being used to adsorb moisture in the air at the condenser (13), the rotary regeneration module (21) being capable of absorbing heat from the air heated by the refrigerant in the subcooler (14), and drying the moisture adsorbed by the rotary adsorption module (22); as well as A regulating subsystem, the regulating subsystem being used to regulate the flow rate of the refrigerant in the heat pump subsystem (1); A solar device (4) is provided between the subcooler (14) and the rotor regeneration module (21), and the solar device (4) is used to collect solar energy and use it to increase the temperature of air entering the rotor regeneration zone.

2. The rotary dehumidification system based on the heat pump system according to claim 1, characterized in that: A fan (5) and a heat pipe heat exchanger (6) are provided between the rotor regeneration module (21) and the evaporator (11); the fan (5) is capable of recovering exhaust air from the rotor regeneration module (21) to the heat pipe heat exchanger (6) to preheat fresh air and transmit the preheated fresh air to the evaporator (11).

3. The rotary dehumidification system based on the heat pump system according to claim 2, characterized in that: The rotary dehumidification subsystem (2) further comprises a water spraying device (23), wherein the water spraying device (23) is arranged on the condenser (13), and the water spraying device (23) is used to humidify indoor return air.

4. The rotary dehumidification system based on the heat pump system according to any one of claims 1 to 3, characterized in that: The heat pump subsystem (1) comprises a first branch (a), a second branch (b) and a third branch (c), wherein the first branch (a) connects the branch between the evaporator (11) and the compressor (12) with the branch between the subcooler (14) and the condenser (13); the second branch (b) connects the branch between the subcooler (14) and the first throttling device (15) with the branch between the evaporator (11) and the compressor (12); and the third branch (c) connects the branch between the subcooler (14) and the condenser (13) with the branch between the first throttling device (15) and the evaporator (11).

5. The rotary dehumidification system based on the heat pump system according to claim 4, characterized in that: The regulating subsystem includes a first valve (1v), a second valve (2v), a third valve (3v) and a fourth valve (4v), wherein the first valve (1v) and the second valve (2v) are located at two ends of the first branch (a), the third valve (3v) is located at one end of the second branch (b) close to the subcooler (14), and the fourth valve (4v) is located at one end of the third branch (c) close to the evaporator.

6. The rotary dehumidification system based on the heat pump system according to any one of claims 1 to 3, characterized in that: The heat pump subsystem (1) comprises a fourth branch (d) and a fifth branch (e), wherein the fourth branch (d) connects the branch between the subcooler (14) and the first throttling device (15) with the branch between the compressor (12) and the condenser (13); and the fifth branch (e) connects the branch between the evaporator (11) and the compressor (12) with the branch between the compressor (12) and the condenser (13).

7. The rotary dehumidification system based on the heat pump system according to claim 6, characterized in that: The regulating subsystem comprises a fifth valve (5v) and a sixth valve (6v), wherein the fifth valve (5v) is located at one end of the fourth branch (d) close to the compressor (12), and the sixth valve (6v) is located at one end of the fifth branch (e) close to the condenser (13).

8. The rotary dehumidification system based on the heat pump system according to claim 7, characterized in that: The heat pump subsystem (1) further comprises a sixth branch (f), wherein the sixth branch (f) is located between the condenser (13) and the subcooler (14), and the sixth branch (f) is provided with a second throttling device (7).

9. The rotary dehumidification system based on the heat pump system according to claim 8, characterized in that: A seventh valve (7v) and an eighth valve (8v) are provided at both ends of the sixth branch (f); the seventh valve (7v) is located at one end of the sixth branch (f) close to the condenser (13), and the eighth valve (8v) is located at one end of the sixth branch (f) close to the subcooler (14).

10. A rotary dehumidification method, applied to a rotary dehumidification system based on a heat pump system, characterized in that: The rotary dehumidification system based on the heat pump system comprises: a heat pump subsystem (1), a rotary dehumidification subsystem (2), an evaporator (11), a compressor (12), a condenser (13), a subcooler (14), a first throttling device (15), a water spraying device (23), a first valve (1v), a second valve (2v), a heat pipe heat exchanger (6), a precooler (16) and a solar device (4); The rotary dehumidification method comprises the following steps: In the first mode, the refrigerant is controlled to circulate in the heat pump subsystem (1), and the refrigerant flows through the evaporator (11), the compressor (12), the condenser (13), the subcooler (14) and the first throttling device (15) in sequence; When frost occurs on the evaporator (11), the openings of the first valve (1v) and the second valve (2v) are controlled so that the high-temperature refrigerant does not pass through the cooler (14) but directly passes through the evaporator (11) for defrosting. At this time, the evaporator (11) performs a condensing operation, and then the refrigerant flows back to the subcooler (14). At this time, the subcooler (14) performs an evaporating operation. The refrigerant flows through the constant pressure valve and enters the compressor (12) for compression to complete the cycle; When the heat pump subsystem (1) is in operation, the condenser (13) and the water spray device (23) are controlled to heat and humidify the indoor return air; Controlling the indoor return air after the temperature increase and humidification process to flow into the rotary adsorption module (22) for dehumidification and then to be sent into the air supply duct; When the heat pump subsystem (1) is in operation, the outdoor fresh air is controlled to pass through the cooler (14) for heat exchange and then further heated by the solar device (4); Passing the heated outdoor fresh air into the rotor regeneration module (21) for dehumidification; Controlling the recovery of the air discharged from the rotary regeneration module (21) and entering the heat pipe heat exchanger (6) to perform heat exchange with the outdoor fresh air entering the evaporator (11); In the second mode, the refrigerant is controlled to circulate in the heat pump subsystem (1), and the refrigerant flows through the condenser (13), the precooler (16), the compressor (12), the subcooler (14), and the second throttling device in sequence, wherein the precooler (16) is arranged in parallel with the condenser (13); When the heat pump subsystem (1) is in operation, the condenser (13) and the precooler (16) are in evaporation operation mode, and the condenser (13) and the precooler (16) are controlled to cool outdoor fresh air; The outdoor fresh air cooled by the condenser (13) enters the rotary adsorption module (22) for dehumidification, and is then mixed with the outdoor fresh air cooled by the precooler (16) and sent into the air supply duct; Controlling the supercooler (14) and the solar device (4) to heat outdoor fresh air; The heated outdoor fresh air is introduced into the rotor regeneration module (21) for dehumidification.

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