A rotary dehumidification system and method based on a heat pump system

Abstract

The present invention discloses a rotary dehumidification system and method based on a heat pump system, which relates to the field of deep dehumidification technology, wherein the rotary dehumidification system based on the heat pump system includes a heat pump subsystem, a rotary dehumidification subsystem and a regulating subsystem, wherein the heat pump subsystem includes 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; 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 the air entering the rotary regeneration zone. The technical solution provided by the present invention can 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 temperature of the exhaust gas discharged during the regeneration process is high, but the waste heat is not effectively utilized, there is a lack of a seasonal mode switching mechanism, and it is impossible to dynamically adapt to the different working conditions in winter and summer, resulting in reduced energy efficiency and increased energy consumption of the unit.

Description

Technical Field

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

[0002] Rotary wheel dehumidification is a deep dehumidification technology that mainly reduces the air humidity by adsorbing moisture in the air with hygroscopic materials (such as silica gel, molecular sieve, etc.). Its core component is a rotary wheel coated with hygroscopic material. The rotary wheel rotates alternately between the process air and the regeneration air to achieve continuous dehumidification. Rotary wheel dehumidification includes an adsorption process and a regeneration process. In the adsorption process, the humid air passes through the adsorption zone of the rotary wheel, and the hygroscopic material adsorbs the moisture in the air to dry the air. In the regeneration process, the rotary wheel rotates to the regeneration zone and is heated by high-temperature air (usually 120 - 250 °C) to make the hygroscopic material release the adsorbed moisture, discharge the high-humidity waste gas, and restore the dehumidification capacity of the rotary wheel. Rotary wheel dehumidification can reduce the air humidity to an extremely low level (such as below 10%RH) and is suitable for scenarios with extremely high humidity requirements. It is not restricted by the environmental temperature and humidity and can work effectively even under low-temperature and high-humidity conditions.

[0003] In the traditional rotary wheel dehumidification, the energy consumption of the regeneration process accounts for a large proportion of the total system energy consumption. The temperature of the waste gas discharged during the regeneration process is relatively high, but the waste heat is not effectively utilized. There is a lack of a seasonal mode switching mechanism and it cannot dynamically adapt to the different working conditions in winter and summer, resulting in problems such as reduced energy efficiency and increased energy consumption of the unit. Summary of the Invention

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

[0005] To achieve the above object, the present invention provides a rotary dehumidification system based on a heat pump system, which includes a heat pump subsystem, a rotary dehumidification subsystem, and an adjustment subsystem. The heat pump subsystem includes an evaporator, a compressor, a condenser, a subcooler, and a first throttling device connected in sequence. A pre-cooler is also provided in the branch between the compressor and the condenser. The rotary dehumidification subsystem includes 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 the heat of the air heated by the refrigerant in the subcooler and dry the moisture adsorbed by the rotary adsorption module. The adjustment subsystem is used to adjust the flow rate of the refrigerant in the heat pump subsystem. Wherein, a solar device is also provided between the subcooler and the rotary regeneration module, and the solar device is used to collect solar energy and use it to increase the temperature of the air entering the rotary regeneration area.

[0006] In one embodiment, a fan and a heat pipe heat exchanger are provided between the rotary regeneration module and the evaporator. The fan can recycle the exhaust air of the rotary 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, and the water spraying device is arranged at the condenser and is used to humidify the 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 connects the branch between the evaporator and the compressor and the branch between the subcooler and the condenser. The second branch connects the branch between the subcooler and the first throttling device and the branch between the evaporator and the compressor. The third branch connects the branch between the subcooler and the condenser and the branch between the first throttling device and the evaporator.

[0009] In one embodiment, the adjustment 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 both ends of the first branch. The third valve is located at one end of the second branch close to the subcooler. 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 connects the branch between the subcooler and the first throttling device and the branch between the compressor and the condenser. The fifth branch connects 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 one end of the fourth branch close to the compressor, and the sixth valve is located at one end of the fifth branch close to the condenser.

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

[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 provides a rotary dehumidification method applied to a rotary dehumidification system based on a heat pump system, which is characterized in that the rotary dehumidification system based on the heat pump system includes: a heat pump subsystem, a rotary dehumidification subsystem, an evaporator, a compressor, a condenser, a subcooler, a first throttling device, a rotary regeneration module, a rotary adsorption module, a water spraying device, a first valve, a second valve, a heat pipe heat exchanger, a pre-cooler, and a solar device;

[0015] The rotary dehumidification method includes the following steps:

[0016] In the first mode, control the refrigerant 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;

[0017] When frosting occurs on the evaporator, control the opening degrees of the first valve and the second valve so that the high-temperature refrigerant does not pass through the subcooler but directly passes through the evaporator for defrosting. At this time, the evaporator operates in the condensation mode, and then the refrigerant flows back to the subcooler. At this time, the subcooler operates in the evaporation mode, and the refrigerant enters the compressor for compression after passing through the constant pressure valve to complete the cycle;

[0018] When the heat pump subsystem is operating, control the condenser and the water spraying device to heat and humidify the indoor return air;

[0019] Control the indoor return air after temperature rise and humidification treatment to flow into the rotary adsorption module for dehumidification and then send it to the air supply duct;

[0020] When the heat pump subsystem is operating, control the outdoor fresh air to exchange heat after passing through the subcooler, and then further raise the temperature through the solar device;

[0021] Inject the outdoor fresh air after temperature rise into the rotary regeneration module for dehumidification;

[0022] Control the wind discharged from the runner regeneration module to be recovered and enter the heat pipe heat exchanger for heat exchange with the outdoor fresh air entering the evaporator;

[0023] In the second mode, control the refrigerant to circulate within the heat pump subsystem, and the refrigerant flows through the condenser, pre-cooler, compressor, sub-cooler, and the second throttling device in sequence, where the pre-cooler is arranged in parallel with the condenser;

[0024] When the heat pump subsystem is operating, the condenser and the pre-cooler operate in the evaporation mode, and control the condenser and the pre-cooler to cool the outdoor fresh air;

[0025] The outdoor fresh air cooled by the condenser enters the runner adsorption module for dehumidification, and after being mixed with the outdoor fresh air cooled by the pre-cooler, it is sent into the air supply duct;

[0026] Control the sub-cooler and the solar energy device to heat the outdoor fresh air;

[0027] The heated outdoor fresh air is introduced into the runner regeneration module for dehumidification.

[0028] The technical solution of the present invention provides a runner dehumidification system based on a heat pump system. Through the collaborative work of the heat pump subsystem and the runner dehumidification subsystem, efficient dehumidification and energy recovery are achieved, the energy consumption during the regeneration process is significantly reduced, and the overall energy efficiency of the system is improved. When the system is operating, the refrigerant in the heat pump subsystem flows through the evaporator, compressor, condenser, sub-cooler, and throttling device in sequence to achieve efficient heat transfer. The heat released by the condenser is transferred to the runner regeneration module through the sub-cooler to provide a heat source for runner regeneration. At the same time, the solar energy collected by the solar energy device further increases the temperature of the regeneration air, ensuring that the runner adsorption module can efficiently release moisture and restore its dehumidification ability during the regeneration process. Using the solar energy device to assist in heating the regeneration air reduces the dependence on traditional energy sources, lowers the operating cost and carbon emissions, and has good economic and environmental benefits. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 It is a schematic structural diagram of an embodiment of the runner dehumidification system based on a heat pump system provided by the present invention;

[0031] Figure 2Schematic structural diagram of another embodiment of the rotary wheel dehumidification system based on the heat pump system provided by the present invention;

[0032] Figure 3 Schematic structural diagram of yet another embodiment of the rotary wheel dehumidification system based on the heat pump system provided by the present invention;

[0033] Figure 4 Step diagram of the dehumidification method provided by the present invention in the first mode;

[0034] Figure 5 Step diagram of the dehumidification method provided by the present invention in the second mode.

[0035] Explanation of the reference numerals in the drawings:

[0036] 100, Rotary wheel dehumidification system based on heat pump system; 1, Heat pump subsystem; 11, Evaporator; 12, Compressor; 13, Condenser; 14, Subcooler; 15, First throttling device; 16, Pre-cooler; 2, Rotary wheel dehumidification subsystem; 21, Rotary wheel regeneration module; 22, Rotary wheel adsorption module; 4, Solar energy device; 5, Fan; 6, Heat pipe heat exchanger; 23, Water spraying device; a, First branch; b, Second branch; c, Third branch; 1v, First valve; 2v, Second valve; 3v, Third valve; 4v, Fourth valve; 5v, Fifth valve; d, Fourth branch; e, Fifth branch; 6v, Sixth valve; f, Sixth branch; 7, Second throttling device; 7v, Seventh valve; 8v, Eighth valve.

[0037] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if the embodiments of the present invention involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] The present invention provides a rotary dehumidification system 100 based on a heat pump system.

[0042] Please refer to Figures 1 to 3 , in an embodiment of the present invention, the rotary dehumidification system 100 based on a heat pump system includes a heat pump subsystem 1, a rotary dehumidification subsystem 2, and an adjustment subsystem. 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. A pre-cooler 16 is further 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. The rotary adsorption module 22 is used to adsorb moisture in the air at the condenser 13. 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 adjustment subsystem is used to adjust the flow rate of the refrigerant in the heat pump subsystem 1. Among them, a solar energy device 4 is further provided between the subcooler 14 and the rotary regeneration module 21. The solar energy device 4 is used to collect solar energy and use it to increase the temperature of the air entering the rotary regeneration area.

[0043] In an embodiment of the present invention, the rotary wheel dehumidification system 100 based on a heat pump system achieves 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, compressor 12, condenser 13, subcooler 14, and the first throttling device 15 in sequence, completing the transfer and recovery of heat. At the condenser 13, the air is heated and then enters the rotary wheel adsorption module 22, where the moisture in it is adsorbed by the moisture-absorbing material. At the same time, the heat generated by the subcooler 14 is transferred to the rotary wheel regeneration module 21 after being assisted by the solar device 4 for heating, which is used to dry the moisture adsorbed by the moisture-absorbing material in the adsorption module. The solar device 4 collects solar energy to further increase the temperature of the air entering the rotary wheel regeneration area and enhance the regeneration efficiency. The adjustment subsystem dynamically adjusts the refrigerant flow according to the operating conditions of the system to ensure that the heat exchange and dehumidification process between the heat pump subsystem 1 and the rotary wheel dehumidification subsystem 2 reach the best match, realizing the efficient and stable operation of the system. In this embodiment, by organically combining the heat pump subsystem 1 and the rotary wheel dehumidification subsystem 2 and introducing the solar device 4 for auxiliary heating, deep dehumidification and efficient recovery and utilization of energy are achieved. On the one hand, the waste heat of the condenser 13 is recovered by the heat pump subsystem 1 and transferred to the rotary wheel regeneration module 21 through the subcooler 14 to provide a heat source for rotary wheel regeneration, effectively reducing the energy consumption during the regeneration process; on the other hand, the introduction of the solar device 4 further increases the temperature of the regeneration 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 adjustment subsystem enables the system to flexibly adjust the operating state according to different working conditions, ensuring the stability of the dehumidification effect and the efficiency of the system, thereby significantly improving the overall energy efficiency and environmental adaptability of the system while reducing the operating cost.

[0044] In one embodiment of the present invention, please refer to Figure 1 and Figure 2 , a fan 5 and a heat pipe heat exchanger 6 are provided between the rotary wheel regeneration module 21 and the evaporator 11. The fan 5 can recover the exhaust air of the rotary wheel regeneration module to the heat pipe heat exchanger 6 to preheat the fresh air and transmit the preheated fresh air to the evaporator 11.

[0045] In this embodiment, a blower 5 and a heat pipe heat exchanger 6 are arranged between the rotary wheel regeneration module 21 and the evaporator 11. During operation, the blower 5 recovers the high-temperature exhaust air discharged from the rotary wheel regeneration module 21 and transmits it to the heat pipe heat exchanger 6. Inside 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 fresh outdoor air sent into the evaporator 11 in winter is preheated through the heat pipe heat exchanger 6, which not only reduces the risk of frosting on the device surface 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 blower 5 and the heat pipe heat exchanger 6 between the rotary wheel regeneration module 21 and the evaporator 11, the present invention realizes the effective recovery and utilization of the regeneration waste heat. This design not only avoids the frosting problem of the evaporator 11 caused by low-temperature fresh air, extends the service life of the equipment, but also improves the overall energy efficiency of the system. At the same time, using the regeneration waste heat to preheat the fresh air of the evaporator 11 reduces the demand for external heating energy of the system, reduces the operating cost, and enhances the economy and environmental friendliness of the system.

[0046] In an embodiment of the present invention, please refer to Figure 1 , the rotary wheel dehumidification subsystem 2 further includes a water spraying device 23, and the water spraying device 23 is arranged on the condenser 13, and the water spraying device 23 is used for humidifying the indoor return air.

[0047] In one embodiment, the rotary wheel dehumidification subsystem 2 further includes a water spraying device 23, and this device 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 and humidify the return air, so that the temperature reaches 25 °C and the relative humidity reaches 90%. After passing through the rotary wheel adsorption module 22 for dehumidification and temperature increase, the air with a higher temperature is supplied to the end for use; the condenser 13 and the water spraying device 23 heat and humidify the indoor return air. The step of humidifying the return air by the water spraying device 23 improves the utilization efficiency and energy efficiency of the rotary wheel system in winter, realizes the free acquisition of higher-grade temperature heat in winter, realizes the full utilization of energy, reduces the condensation temperature of the heat pump unit, and improves the system energy efficiency.

[0048] In an embodiment of the present invention, please refer to Figure 1 , the 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 and 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 and 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 and the branch between the first throttling device 15 and the evaporator 11.

[0049] In this embodiment, the heat pump subsystem 1 realizes the efficient flow and heat exchange of the 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 for defrosting does not pass through the cooler 14 but directly releases heat through the evaporator 11. Then, the refrigerant can return to the subcooler 14 through the first branch a and finally flow to the constant pressure valve through the second branch b and then into the compressor 12. The second branch b connects the branch between the subcooler 14 and the first throttling device 15 and 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 and the branch between the first throttling device 15 and the evaporator 11, providing an alternative path for the refrigerant to ensure that the system can flexibly adjust the flow direction of the refrigerant under different working conditions, 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 achieve multi-path flow of the refrigerant and efficient recovery and utilization of heat. 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 enhances the energy efficiency of the system.

[0050] In one embodiment of the present invention, please refer to Figure 2 , the regulation 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. The fourth valve 4v is located at one end of the third branch c close to the evaporator 11.

[0051] 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 both ends of the first branch a to control the refrigerant flow 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 to regulate the refrigerant distribution between the subcooler 14 and the evaporator 11, so that during the defrosting process, by adjusting the opening degree of the third valve 3v, the refrigerant can 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 to manage the refrigerant reflux between the subcooler 14 and the evaporator 11. During winter operation, when frosting occurs on the evaporator 11, by regulating the first valve 1v, the second valve 2v, the third valve 3v and the fourth valve 4v, the flow direction of the refrigerant is changed, so that the high-temperature refrigerant coming out of the condenser 13 does not pass through the cooler 14 but directly passes through the evaporator 11 for the defrosting process. At this time, the evaporator 11 operates in the condensation mode, and then the refrigerant flows back through the subcooler 14. At this time, the subcooler 14 operates in the evaporation mode, 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 successively the condenser 13, the first valve 1v, the third branch c, the evaporator 11, the second valve 2v, the first branch a, the first valve 1v, the subcooler 14, the third valve 3v, the second branch b, the compressor 12, and finally the cycle is completed. Through the coordinated operation of these valves, the system can dynamically adjust the refrigerant flow in each branch according to different operating conditions, ensure the efficient operation of the heat pump subsystem 1 under various conditions, and thus optimize 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 refrigerant distribution according to different operating conditions, but also significantly enhances the energy efficiency and stability of the system. For example, during high-load operation, by reasonably adjusting the opening degrees of each valve, it can ensure the efficient flow of the refrigerant between each component, avoiding local overload or insufficiency; during low-load or part-load operation, it can flexibly adjust the flow rate to reduce unnecessary energy consumption. In addition, this fine flow control also helps to extend the service life of the equipment, reduce the maintenance cost, and enhance the overall reliability and economy of the system.

[0052] In one embodiment of the present invention, please refer to Figures 1 to 3, the 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 regulation 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 further includes a sixth branch f, which is located on the branch between the condenser 13 and the subcooler 14, and a second throttling device 7 is provided on the sixth branch f. Both ends of the sixth branch f are provided with a seventh valve 7v and an eighth valve 8v. 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.

[0053] In this embodiment, during summer operation, the condenser 13 and the precooler 16 operate in the evaporation mode. 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 through the adjustment of the second valve 2v, the refrigerant flows through the compressor 12, then returns to the subcooler 14 through the fourth branch d, flows into the sixth branch f, 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.

[0054] The present invention also proposes a rotary dehumidification method. Please refer to Figures 1 to 5 , which is applied to a rotary dehumidification system 100 based on a heat pump system. It is characterized in that the rotary dehumidification system 100 based on a heat pump system includes: 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 rotary regeneration module 21, a rotary adsorption module 22, 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 energy device 4. The rotary dehumidification method includes the following steps:

[0055] In the first mode, control the refrigerant to circulate in the heat pump subsystem 1, and the refrigerant sequentially flows through the evaporator 11, the compressor 12, the condenser 13, the subcooler 14, and the first throttling device 15.

[0056] When frosting occurs in the evaporator 11, control the opening degrees of the first valve 1v and the second valve 2v so that the high-temperature refrigerant does not pass through the subcooler 14 but directly passes through the evaporator 11 for the defrosting process. At this time, the evaporator 11 operates in the condensation mode, and then the refrigerant flows back to the subcooler 14. At this time, the subcooler 14 operates in the evaporation mode. The refrigerant flows through the constant pressure valve and then enters the compressor 12 to complete the cycle;

[0057] When the heat pump subsystem 1 is operating, control the condenser 13 and the water spraying device 23 to heat and humidify the indoor return air;

[0058] Control the indoor return air after temperature rise and humidification treatment to flow into the rotary adsorption module 22 for dehumidification and then send it into the air supply duct;

[0059] When the heat pump subsystem 1 is operating, control the outdoor fresh air to exchange heat after passing through the subcooler 14 and then further increase the temperature through the solar energy device 4;

[0060] Send the outdoor fresh air after temperature rise into the rotary regeneration module 21 for dehumidification;

[0061] Control the air discharged from the rotary 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;

[0062] In the second mode, control the refrigerant to circulate in the heat pump subsystem 1. The refrigerant flows through the condenser 13, the precooler 16, the compressor 12, the subcooler 14 and the second throttling device 7 in sequence. Among them, the precooler 16 is arranged in parallel with the condenser 13;

[0063] When the heat pump subsystem 1 is operating, the condenser 13 and the precooler 16 operate in the evaporation mode, and control the condenser 13 and the precooler 16 to cool the outdoor fresh air;

[0064] 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;

[0065] Control the subcooler 14 and the solar energy device 4 to heat the outdoor fresh air;

[0066] Send the outdoor fresh air after temperature rise into the rotary regeneration module 21 for dehumidification.

[0067] The present invention proposes a rotary wheel 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 the winter mode and the 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 transfer and recovery of heat. At this time, the condenser 13 heats the indoor return air, and the heated return air flows into the rotary wheel adsorption module 22 for dehumidification and then is sent into the air supply duct. At the same time, the outdoor fresh air exchanges heat through the cooler 14, is further heated by the solar energy device 4, then enters the rotary wheel 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 rotary wheel 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. At the same time, the subcooler 14 and the solar energy device 4 heat the outdoor fresh air, and the heated outdoor fresh air enters the rotary wheel regeneration module for dehumidification.

[0068] The present invention realizes efficient dehumidification and energy recovery under winter and summer conditions through seasonal mode switching. In the winter mode, the heat of the condenser 13 is used to heat the indoor return air, significantly improving the air supply temperature. At the same time, the outdoor fresh air is further heated by the solar energy device 4, reducing the regeneration energy consumption. Specifically, in the winter mode, by utilizing the temperature rise characteristic of rotary wheel dehumidification, higher-grade temperature heat can be obtained for free, reducing the condensation temperature of the heat pump unit and improving the system energy efficiency. For example, in Tibet, when the regeneration temperature is 20°C and the ratio of adsorption air volume to regeneration air volume is 1:2, the energy obtained before using this system is 0.68 kW, and after using this system it is 0.92 kW, and the increase in sensible heat obtained by using the rotary wheel reaches 35%.

[0069] In the summer mode, the pre-cooler 16 and the condenser 13 are in a parallel structure, and the refrigerant flow rate can be adjusted by regulating the opening degree of the valve, so that the distribution ratio of the refrigerant between the pre-cooler 16 and the condenser 13 can be dynamically adjusted according to the actual working conditions, so as 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 opening degree of the valve on the pre-cooler 16 side, the refrigerant flow rate in the pre-cooler 16 is increased, thereby enhancing the heat release capacity of the pre-cooler 16. The pre-cooler 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, reducing the refrigerant flow rate of the condenser 13 to avoid increasing the operating load of the rotary dehumidifier. When focusing on the latent heat treatment of air, more refrigerant is made to flow to the condenser 13 by adjusting the valve, enhancing the treatment effect of the condenser 13 on the fresh air. When the condenser 13 operates as an evaporator 11, it absorbs the heat of the outdoor fresh air, reduces 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 both sensible heat and latent heat at the same time, according to different seasons and working conditions, the refrigerant distribution ratio between the pre-cooler 16 and the condenser 13 needs to be adjusted to ensure the synchronous and efficient processing of sensible heat and latent heat. The condenser 13 and the pre-cooler 16 operate as an evaporator 11, effectively reducing the temperature of the outdoor fresh air, reducing the latent heat load during the dehumidification process, and improving the refrigeration efficiency of the system. For example, when the outdoor temperature is about -20 °C, the energy efficiency of a common heat pump system is between 2.0 and 2.5, while the collaborative system improves the sensible heat temperature, reduces the condensation temperature of the system, and increases the energy efficiency to between 3 and 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 the operating cost, and has significant economic and environmental benefits.

[0070] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is 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, Comprising: A heat pump subsystem (1), 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. A pre-cooler (16) is also provided in the branch between the compressor (12) and the condenser (13); A rotary dehumidification subsystem (2), the rotary dehumidification subsystem (2) includes a rotary regeneration module (21) and a rotary adsorption module (22). The rotary adsorption module (22) is used to adsorb moisture in the air at the condenser (13), and the rotary regeneration module (21) 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); And A regulating subsystem, the regulating subsystem is used to regulate 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 temperature of the air entering the rotary regeneration area; The 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) and 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) and 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) and the branch between the first throttling device (15) and the evaporator (11).

2. The rotary dehumidification system based on a heat pump system according to claim 1, wherein A fan (5) and a heat pipe heat exchanger (6) are provided between the rotary regeneration module (21) and the evaporator (11). The fan (5) can recycle the exhaust air of the rotary regeneration module (21) to the heat pipe heat exchanger (6) to preheat the fresh air and transmit the preheated fresh air to the evaporator (11).

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

4. The rotary dehumidification system based on a heat pump system according to claim 1, wherein 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.

5. The rotary dehumidification system based on a heat pump system according to any one of claims 1 to 3, characterized in that, The 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).

6. The rotary dehumidification system based on a heat pump system according to claim 5, wherein The regulation 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).

7. The rotary dehumidification system based on a heat pump system according to claim 6, wherein, The heat pump subsystem (1) further includes a sixth branch (f). The sixth branch (f) is located in the branch between the condenser (13) and the subcooler (14), and a second throttling device (7) is provided on the sixth branch (f).

8. The rotary dehumidification system based on a heat pump system according to claim 7, characterized in that, Both ends of the sixth branch (f) are provided with a seventh valve (7v) and an eighth valve (8v). 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).

9. A rotary wheel dehumidification method, which is applied to a rotary wheel dehumidification system based on a heat pump system, is characterized in that, The rotary dehumidification system based on the heat pump system includes: 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 rotary regeneration module (21), a rotary adsorption module (22), a water spraying device (23), a first valve (1v), a second valve (2v), a heat pipe heat exchanger (6), a pre-cooler (16), and a solar energy device (4); The rotary dehumidification method includes the following steps: In the first mode, control the refrigerant 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 frosting occurs in the evaporator (11), control the opening degrees of the first valve (1v) and the second valve (2v) so that the high-temperature refrigerant does not pass through the subcooler (14) but directly passes through the evaporator (11) for defrosting. At this time, the evaporator (11) operates in the condensation mode, and then the refrigerant flows back to the subcooler (14). At this time, the subcooler (14) operates in the evaporation mode, and the refrigerant enters the compressor (12) for compression after flowing through the constant pressure valve to complete the cycle; When the heat pump subsystem (1) is operating, control the condenser (13) and the water spraying device (23) to heat and humidify the indoor return air; Control the indoor return air after temperature rise and humidification treatment to flow into the rotary adsorption module (22) for dehumidification and then send it to the air supply duct; When the heat pump subsystem (1) is operating, control the outdoor fresh air to exchange heat after passing through the subcooler (14), and then further raise the temperature through the solar energy device (4); The heated outdoor fresh air is introduced into the rotary wheel regeneration module (21) for dehumidification; Control the air discharged from the rotary wheel 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, control the refrigerant 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 operating, the condenser (13) and the precooler (16) operate in the evaporation mode, and control the condenser (13) and the precooler (16) to cool the outdoor fresh air; The outdoor fresh air cooled by the condenser (13) enters the rotary wheel adsorption module (22) for dehumidification, and is mixed with the outdoor fresh air cooled by the precooler (16) and then sent to the air supply duct; Control the subcooler (14) and the solar device (4) to heat the outdoor fresh air; The heated outdoor fresh air is introduced into the rotary wheel regeneration module (21) for dehumidification.

Images