Heat pump driven renewable drying bed dehumidification dew point evaporative cooling air conditioning system

Abstract

The utility model discloses a heat pump driven renewable drying bed dehumidification dew point evaporative cooling air conditioning system which comprises a heat pump subsystem, a drying bed dehumidification subsystem, a tubular dew point evaporative cooling subsystem, an adsorption air pipeline subsystem and a regeneration air pipeline subsystem. The drying bed dehumidification subsystem bears the latent heat load of the air conditioning system, and the tubular dew point evaporative cooling subsystem bears the sensible heat load of the air conditioning system. The heat pump is used for regenerating saturated solid drying agent particles in the drying beds, one drying bed is applied to the adsorption process, the other drying bed is applied to the regeneration process, the dehumidification capacity of the drying beds is guaranteed, meanwhile, efficient dehumidification is achieved, the tubular dew point evaporation cooling subsystem is used for cooling, heat pollution is reduced, emission is reduced, and the energy-saving and environment-friendly effects are achieved. And the requirement of people on indoor temperature is met.

Description

Technical Field

[0001] This utility model patent relates to the field of HVAC, and specifically designs a heat pump driven regenerative drying bed dehumidification dew point evaporative cooling air conditioning system. Background Art

[0002] Against the backdrop of heightened global attention to energy efficiency and environmental sustainability, the energy-saving and environmentally friendly characteristics of air-conditioning systems are becoming increasingly critical research areas. Conventional air-conditioning systems primarily focus on regulating air temperature and humidity, but these systems suffer from numerous drawbacks. In hot and humid summer environments, relying solely on surface coolers for cooling can significantly increase relative humidity, leading to uncomfortable indoor heat. Traditional dehumidification methods, such as condensation dehumidification, while effective, waste energy, and the reheating process further increases energy consumption and equipment investment costs. Adsorption cooling technology, with its ability to utilize low-grade thermal energy, offers significant energy-saving potential, particularly when combined with renewable energy sources such as solar energy and industrial waste heat. Tubular dew-point evaporative cooling air conditioners offer independent control of temperature and humidity, offering advantages in energy and water conservation. However, their performance is significantly limited under high-temperature and high-humidity operating conditions.

[0003] Given the high energy consumption and environmental impact of traditional air-conditioning systems, as well as the varying limitations of existing refrigeration technologies, a new air-conditioning system is urgently needed. This is why the heat pump-driven, regenerative desiccant bed dehumidification and dew-point evaporative cooling air-conditioning system has emerged. This system integrates multiple advanced technologies to improve energy efficiency and reduce environmental impact, thereby providing users with a comfortable indoor environment. This system addresses the shortcomings of existing technologies and meets practical application needs. Utility Model Content

[0004] (1) Technical issues

[0005] The purpose of the utility model is to provide a solution to the application problem of the combination of a drying bed dehumidification dew point evaporative cooling system and a heat pump system in the field of heating, ventilation and air conditioning, and to realize an efficient, economical and recyclable heat pump-driven regenerative drying bed dehumidification dew point evaporative cooling air conditioning system.

[0006] (2) Technical solution

[0007] In order to solve the above problems, the present invention adopts the following technical solutions:

[0008] A heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system is characterized in that the system comprises a heat pump subsystem, a desiccant bed dehumidification subsystem, a tubular dew point evaporative cooling subsystem, an adsorption air piping subsystem and a regeneration air piping subsystem.

[0009] A preferred technical solution is that the heat pump subsystem includes a regenerative fan, a finned heat exchanger, a throttle valve, a compressor and a shell-and-tube heat exchanger; the finned heat exchanger tubes contain refrigerant, the fins are arranged on the air side, the compressor outlet is connected to the refrigerant inlet of the finned heat exchanger, the refrigerant outlet of the finned heat exchanger is connected to the throttle valve inlet, the throttle valve outlet is connected to the inner tube inlet of the shell-and-tube heat exchanger, the inner tube outlet of the shell-and-tube heat exchanger is connected to the compressor inlet, and the regenerative fan outlet is connected to the air inlet of the finned heat exchanger.

[0010] The preferred technical solution is that the desiccant bed dehumidification subsystem includes an adsorption fan, a fin heat exchanger, desiccant bed No. 1, desiccant bed No. 2, a temperature and humidity sensor and a valve; the inlet of desiccant bed No. 1 and desiccant bed No. 2 each has two pipelines, one connected to the outlet of the adsorption fan, and the other connected to the air outlet of the fin heat exchanger, and valves are provided at the connection points; the outlet of desiccant bed No. 1 and desiccant bed No. 2 each has two pipelines, one connected to the outside, and the other connected to the inlet of the tubular dew point evaporative cooler, and a temperature and humidity sensor is provided on the connecting pipe, and valves are provided at the connection points of the two pipelines, and a certain amount of desiccant particles are filled in desiccant bed No. 1 and desiccant bed No. 2.

[0011] According to a preferred technical solution, the tubular dew-point evaporative cooling subsystem includes a tubular dew-point evaporative cooler, a circulating water pump, a water tank, a make-up water pump and a pipeline; the interior of the tubular dew-point evaporative cooler is a tube bundle structure, provided with a spray port, a return water port, a return air port and an exhaust port, the spray port is provided at the top of the tubular dew-point evaporative cooler, the return water port is provided at the bottom of the tubular dew-point evaporative cooler, the water tank outlet is connected to the circulating water pump inlet, the circulating water pump outlet is connected to the outer tube inlet of the shell and tube heat exchanger, the outer tube outlet of the shell and tube heat exchanger is connected to the spray port, the return water port is connected to the water tank inlet, the make-up water pump outlet is connected to the water tank, the tubular dew-point evaporative cooler air outlet has two pipelines, one is connected to the indoor environment, the other is connected to the return air port, and the exhaust port is connected to the outdoor environment.

[0012] The preferred technical solution is that the adsorption air pipeline subsystem includes an adsorption fan, drying bed No. 1, drying bed No. 2, a temperature and humidity sensor, a tubular dew point evaporative cooler and a valve; when drying bed No. 1 is an adsorption drying bed, the adsorption fan outlet is connected to the inlet of drying bed No. 1, and the outlet of drying bed No. 1 is connected to the air inlet of the tubular dew point evaporative cooler. The temperature and humidity sensor is on the air duct connecting the two. The air outlet of the tubular dew point evaporative cooler has two pipelines, one connected to the room and the other connected to the return air outlet. When drying bed No. 2 is an adsorption drying bed, the drying bed No. 1 in the step can be replaced.

[0013] Preferably, the regeneration air pipeline subsystem comprises a regeneration fan, a finned heat exchanger, a drying bed 1, a drying bed 2, related valves and related pipelines; when the drying bed 1 is a regeneration drying bed, the outlet of the regeneration fan is connected with the air inlet of the finned heat exchanger, the air outlet of the finned heat exchanger is connected with the inlet of the drying bed 1, and the outlet of the drying bed 1 is connected with the outdoor; when the drying bed 2 is a regeneration drying bed, the drying bed 1 in the step is replaced.

[0014] Further, in the system, when the drying bed 1 is an adsorption drying bed and the drying bed 2 is a regeneration drying bed, valve 1, valve 4, valve 5 and valve 8 are opened, and valve 2, valve 3, valve 6 and valve 7 are closed; when the drying bed 2 is an adsorption drying bed and the drying bed 1 is a regeneration drying bed, valve 1, valve 4, valve 5 and valve 8 are closed, and valve 2, valve 3, valve 6 and valve 7 are opened.

[0015] Further, in the system, the water tank is replenished with water by the water replenishing pump, collects and recycles the condensed water generated by the tubular dew point evaporative cooler, and is arranged in the circulating pipeline of the tubular dew point evaporative cooling subsystem, so as to ensure the water pressure stability of the tubular dew point evaporative cooling subsystem and maintain the system operation.

[0016] Further, in the system, the drying bed 1 and the drying bed 2 jointly bear the latent heat load of the air conditioning system.

[0017] Further, in the system, the tubular dew point evaporative cooler bears the sensible heat load of the air conditioning system.

[0018] Further, in the system, the top and bottom of the drying bed 1 and the drying bed 2 are both provided with wire meshes, and the pipelines are connected by flanges.

[0019] In order to meet the regeneration conditions of the desiccant particles, the finned heat exchanger is specially selected, which effectively increases the heat exchange area between the outdoor air blown by the regeneration fan and the refrigerant pipeline, so that the refrigerant and the outdoor air are more fully heat exchanged, and the blown outdoor air reaches the regeneration conditions.

[0020] In order to ensure that the two drying beds work at the same time and bear the functions of adsorbing water in the air and regenerating desiccant particles respectively, corresponding valves are arranged on the connecting air pipes of the drying beds and the adsorption fan, the finned heat exchanger, the tubular dew point evaporative cooler and the outdoor, and the opening and closing of the valves are controlled to ensure the normal work of the drying beds.

[0021] In order to ensure that the desiccant particles in the drying bed will not fall out of the drying bed, wire mesh is provided at the inlet and outlet of the drying bed, and the inlet and outlet are connected by flanges, which have good sealing properties and can fix the wire mesh.

[0022] In order to enhance the heat exchange effect between the low-temperature water sprayed from the top spray port of the tubular dew-point evaporative cooler and the air in the tube bundle of the tubular dew-point evaporative cooler, part of the cooling air at the outlet of the tubular dew-point evaporative cooler is led back to the wet side of the tubular dew-point evaporative cooler to enhance the heat exchange, so that the heat exchange between the low-temperature water and the air in the tube bundle is more efficient.

[0023] In order to ensure the water pressure and circulation stability of the circulating water circuit of the tubular dew-point evaporative cooling subsystem, a water tank and a water replenishment pump are added to the circulating pipeline of the tubular dew-point evaporative cooling subsystem. The water tank stabilizes the water pressure of the circulating water circuit of the tubular dew-point evaporative cooling subsystem and replenishes water to the circulating water circuit, while the water replenishment pump replenishes water to the water tank to ensure the normal operation of the water tank.

[0024] In order to improve the control accuracy of the air conditioning system on the indoor air temperature and humidity, the drying bed dehumidification subsystem is used to bear the indoor humidity load, and the tubular dew point evaporative cooling subsystem is used to bear the indoor sensible heat load.

[0025] (3) Beneficial effects

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] The present utility model proposes a heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system. In terms of energy saving, it is driven by a heat pump and makes full use of low-grade thermal energy, which greatly improves energy utilization and effectively reduces energy consumption. In combination with tubular dew point evaporative cooling technology, it further reduces additional energy consumption and achieves high efficiency and energy saving. In terms of dehumidification performance, a desiccant bed dehumidification method is used, and the two desiccant beds cooperate with each other to avoid performance fluctuations that may occur in a single device. It can effectively cope with various working conditions, always ensure that the indoor humidity is within a comfortable range, and achieve a stable dehumidification effect. From an environmental protection perspective, it reduces dependence on high-grade electrical energy, thereby reducing greenhouse gas emissions. At the same time, it does not use refrigerants with high global warming potential (GWP), meets environmental protection requirements, and effectively promotes sustainable development, showing outstanding comprehensive advantages in the field of air conditioning technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a heat pump driven regenerative drying bed dehumidification dew point evaporative cooling air conditioning system of the utility model.

[0029] The figure shows: regeneration fan 1-1; adsorption fan 1-2; finned heat exchanger 2; drying bed No. 1 3-1; drying bed No. 2 3-2; tubular dew point evaporative cooler 4; spray port 4-1; return water port 4-2; return air port 4-3; exhaust port 4-4; throttle valve 5; compressor 6; shell and tube heat exchanger 7; circulating water pump 8; water tank 9; make-up water pump 10; temperature and humidity sensor 11; valve one 12-1; valve two 12-2; valve three 12-3, valve four 12-4; valve five 12-5; valve six 12-6; valve seven 12-7; valve eight 12-8; return air valve 12-9; delivery valve 12-10. DETAILED DESCRIPTION

[0030] Combine Figure 1 The present invention is further described with reference to specific embodiments.

[0031] The utility model relates to a heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system. The system comprises a heat pump subsystem, a desiccant bed dehumidification subsystem, a tubular dew point evaporative cooling subsystem, an adsorption air piping subsystem and a regeneration air piping subsystem. The specific connection method is as follows:

[0032] In the heat pump subsystem, the refrigerant is in the tube of the finned heat exchanger 2, the fins are arranged on the air side, the outlet of the compressor 6 is connected to the refrigerant inlet of the finned heat exchanger 2, the refrigerant outlet of the finned heat exchanger 2 is connected to the inlet of the throttle valve 5, the outlet of the throttle valve 5 is connected to the inlet of the inner tube of the shell and tube heat exchanger 7, the outlet of the inner tube of the shell and tube heat exchanger 7 is connected to the inlet of the compressor 6, and the outlet of the regeneration fan 1-1 is connected to the air inlet of the finned heat exchanger 2.

[0033] In the desiccant bed dehumidification subsystem, the outlet of the adsorption fan 1-2 is connected to the inlet 3-1 of desiccant bed 1 and the inlet 3-2 of desiccant bed 2 respectively, the air outlet of the finned heat exchanger is connected to the inlet 3-1 of desiccant bed 1 and the inlet 3-2 of desiccant bed 2, and the outlet of desiccant bed 1 3-1 and the outlet of desiccant bed 2 3-2 are both connected to the inlet of the tubular dew point evaporative cooler 4 and the outdoors.

[0034] In the tubular dew-point evaporative cooling subsystem, the outlet of the water tank 9 is connected to the inlet of the circulating water pump 8, the outlet of the circulating water pump 8 is connected to the inlet of the outer tube of the shell and tube heat exchanger 7, the outlet of the outer tube of the shell and tube heat exchanger 7 is connected to the top spray port 4-1 of the tubular dew-point evaporative cooler 4, the return water port 4-2 of the tubular dew-point evaporative cooler 4 is connected to the inlet of the water tank 9, the air outlet of the tubular dew-point evaporative cooler 4 has two pipelines, one is connected to the indoor room, and the other is connected to the return air port 4-3, and the exhaust port 4-4 of the tubular dew-point evaporative cooler 4 is connected to the outdoors.

[0035] When drying bed No. 1 3-1 is an adsorption drying bed, the outlet of the adsorption fan 1-2 is connected to the inlet of drying bed No. 1 3-1, and the outlet of drying bed No. 1 3-1 is connected to the air inlet of the tubular dew point evaporative cooler 4. The temperature and humidity sensor 11 is on the air duct connecting the two. The air outlet of the tubular dew point evaporative cooler 4 has two pipelines, one is connected to the room, and the other is connected to the return air outlet 4-3. When drying bed No. 2 3-2 is an adsorption drying bed, just replace drying bed No. 1 in the step.

[0036] When drying bed No. 1 is a regenerative drying bed, the outlet of regeneration fan 1-1 is connected to the air inlet of finned heat exchanger 2, the air outlet of finned heat exchanger 2 is connected to the inlet of drying bed No. 1 3-1, and the outlet of drying bed No. 1 3-1 is connected to the outdoors. When drying bed No. 2 3-2 is a regenerative drying bed, just replace drying bed No. 1 in the steps.

[0037] When the heat pump-driven regenerative desiccant bed dehumidification dew point evaporative cooling air-conditioning system is in summer cooling operation, tubular dew point evaporative cooler 4 bears the sensible heat load of the air-conditioning system, and desiccant bed No. 1 and desiccant bed No. 2 jointly bear the latent heat load of the air-conditioning system.

[0038] When the heat pump subsystem operates, compressor 6 starts up, drawing in and compressing the low-temperature, low-pressure refrigerant R134a. After compression, the refrigerant transforms into a high-temperature, high-pressure gas. This high-temperature, high-pressure refrigerant is then transported through a pipeline to finned heat exchanger 2. In finned heat exchanger 2, the high-temperature, high-pressure refrigerant exchanges heat with the outdoor air blown in by regeneration blower 1-1. During this process, the refrigerant transfers heat to the outdoor air, causing the air temperature to rise while the refrigerant's own temperature to fall. After the heat exchange is complete, the cooled refrigerant passes through throttle valve 5, changing its state to a low-temperature, low-pressure refrigerant. It is then transported to the inner tube of the double-tube heat exchanger 7. Once inside the double-tube heat exchanger 7, the low-temperature, low-pressure refrigerant exchanges heat with water drawn from water tank 9. The refrigerant absorbs heat from the water, causing the water temperature to fall while the refrigerant's own temperature rises. Finally, the refrigerant with a raised temperature is sent back to the compressor 6, thus completing a complete working cycle. This cycle will be repeated continuously to achieve stable operation of the heat pump subsystem, ensuring effective heat transfer and reasonable temperature regulation.

[0039] When the desiccant bed dehumidification subsystem is in operation, the two desiccant beds work together to realize the air dehumidification function. In the initial state, the two desiccant beds work simultaneously, one of which (such as desiccant bed No. 1 3-1) serves as an adsorption desiccant bed, and the other (such as desiccant bed No. 2 3-2) serves as a regeneration desiccant bed. When the system starts, the adsorption fan 1-2 starts working and blows outdoor air into desiccant bed No. 1 3-1. In desiccant bed No. 1 3-1, the solid desiccant particles absorb moisture in the air by virtue of their adsorption characteristics, completing the dehumidification process. Afterwards, the dehumidified air passes through the temperature and humidity sensor 11, which accurately measures the temperature and humidity of the air in real time. If the humidity meets the conditions of the air conditioning system, the system sends the air into the tubular dew point evaporative cooler 4 to further adjust the temperature, and finally sends it indoors to meet the requirements of the indoor environment for the air state.

[0040] At the same time, outdoor air blown in by regeneration fan 1-1 is sent to finned heat exchanger 2. In finned heat exchanger 2, the air exchanges heat with the high-temperature refrigerant, absorbing the refrigerant's heat and turning into a hot gas. This hot gas is then sent to desiccant bed 2 3-2. There, the hot air comes into contact with the solid desiccant particles, causing them to regenerate and release the previously adsorbed moisture, thus regenerating the desiccant particles. The high-temperature waste air after regeneration, due to its high moisture content and high temperature, is unsuitable for reuse and is ultimately discharged outdoors.

[0041] During the continuous operation of the system, the temperature and humidity sensor 11 plays a key monitoring role. When the adsorption capacity of drying bed No. 1 3-1 deteriorates over time or due to other factors, the air humidity measured by the temperature and humidity sensor 11 will be higher than the required value of the indoor environment. At this time, the air flow direction is switched by opening or closing the corresponding valve of the control system. That is, the air enters drying bed No. 2 3-2 and the moisture therein is adsorbed by the solid desiccant particles, while the high-temperature air enters drying bed No. 1 to regenerate the solid desiccant particles, thereby interchangeing the functions of the two drying beds. This cycle repeats itself, and the two drying beds can continuously dehumidify the air, always ensuring that the system has a stable and reliable dehumidification capacity, and effectively maintaining the indoor air humidity within an appropriate range.

[0042] In the tubular dew-point evaporative cooling subsystem, water from the water tank 9 is pumped to the double-tube heat exchanger 7 by a circulating water pump 8. In the double-tube heat exchanger 7, the water exchanges heat with the low-temperature, low-pressure refrigerant, becoming lower-temperature water. This low-temperature water is then piped to the spray port 4-1 at the top of the tubular dew-point evaporative cooler 4. The low-temperature water sprays out from the spray port 4-1 and evenly falls onto the wet-side tube bundle of the tubular dew-point evaporative cooler 4, cooling the air within the tube bundle. The spray of low-temperature water cools the air within the tube bundle. After being sprayed, the water absorbs heat from the tube bundle and the air, raising its temperature. The water is then returned to the water tank 9 through the return port 4-2 at the bottom of the tubular dew-point evaporative cooler 4 for recycling. Simultaneously, a small amount of return air is drawn back through the air outlet of the tubular dew-point evaporative cooler 4. This return air is blown toward the tube bundle from return air port 4-3, enhancing the heat exchange between the cold water and the tube bundle, further improving the air cooling efficiency. The final portion of return air, due to its increased humidity, cannot be introduced indoors, so it is discharged through exhaust port 4-4 and sent outdoors. The dry air inside tubular dew-point evaporative cooler 4 is cooled and then sent indoors for use.

[0043] The adsorbed air is sent to the inlet of the adsorption drying bed (drying bed No. 1 3-1 / drying bed No. 2 3-2) through the outlet of the adsorption fan 1-2. The wet air is adsorbed and converted into dry air. The air is then sent to the air inlet of the tubular dew-point evaporative cooler 4 from the outlet of the adsorption drying bed. The dry air is cooled and sent into the room from the air outlet of the tubular dew-point evaporative cooler 4.

[0044] The regenerated air is sent into the air inlet of the finned heat exchanger 2 through the outlet of the regeneration fan 1-1. The low-temperature air becomes high-temperature air and is then sent into the inlet of the regenerated drying bed (drying bed No. 2 3-2 / drying bed No. 1 3-1) from the air outlet of the finned heat exchanger 2. The heat of the high-temperature air causes the moisture in the solid desiccant particles to be absorbed and carried away by the surrounding air. After regeneration, the high-temperature exhaust gas containing moisture is discharged to the outside from the outlet of the regenerated drying bed (drying bed No. 2 3-2 / drying bed No. 1 3-1).

[0045] The above embodiments are only preferred implementation methods of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and equivalent substitutions can be made without departing from the principles of the present invention. These technical solutions after improvements and equivalent substitutions to the claims of the present invention all fall within the scope of protection of the present invention.

Claims

1. A heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system, characterized in that: The system includes a heat pump subsystem, a drying bed dehumidification subsystem, a tubular dew point evaporative cooling subsystem, an adsorption air piping subsystem and a regeneration air piping subsystem; The heat pump subsystem comprises a regenerative fan (1-1), a finned heat exchanger (2), a throttle valve (5), a compressor (6) and a shell-and-tube heat exchanger (7); the finned heat exchanger (2) has refrigerant in the tube, the fins are arranged on the air side, the compressor (6) outlet is connected to the refrigerant inlet of the finned heat exchanger (2), the refrigerant outlet of the finned heat exchanger (2) is connected to the inlet of the throttle valve (5), the throttle valve (5) outlet is connected to the inner tube inlet of the shell-and-tube heat exchanger (7), the inner tube outlet of the shell-and-tube heat exchanger (7) is connected to the inlet of the compressor (6), and the regenerative fan (1-1) outlet is connected to the air inlet of the finned heat exchanger (2); The desiccant bed dehumidification subsystem comprises an adsorption fan (1-2), a finned heat exchanger (2), a desiccant bed No. 1 (3-1), a desiccant bed No. 2 (3-2), a temperature and humidity sensor (11) and a valve; the inlet of the desiccant bed No. 1 (3-1) and the desiccant bed No. 2 (3-2) are each provided with two pipelines, one connected to the outlet of the adsorption fan (1-2), and the other connected to the air outlet of the finned heat exchanger (2), with valves provided at the connection points; the outlet of the desiccant bed No. 1 (3-1) and the desiccant bed No. 2 (3-2) are each provided with two pipelines, one connected to the outside, and the other connected to the inlet of the tubular dew point evaporative cooler (4), and the temperature and humidity sensor (11) is provided on the connecting pipe, and valves are provided at the connection points of the two pipelines; a certain amount of desiccant particles are filled in the desiccant bed No. 1 (3-1) and the desiccant bed No. 2 (3-2); The tubular dew-point evaporative cooling subsystem comprises a tubular dew-point evaporative cooler (4), a circulating water pump (8), a water tank (9), a water supply pump (10) and a pipeline; the tubular dew-point evaporative cooler (4) has a tube bundle structure inside and is provided with a spray port (4-1), a return water port (4-2), a return air port (4-3) and an exhaust port (4-4); the spray port (4-1) is provided at the top of the tubular dew-point evaporative cooler (4), the return water port (4-2) is provided at the bottom of the tubular dew-point evaporative cooler (4), the water tank (9) is provided at the bottom of the tubular dew-point evaporative cooler (4), and the return water port (4-3) is provided at the bottom of the tubular dew-point evaporative cooler (4). ) outlet is connected to the outer tube inlet of the shell-and-tube heat exchanger (7), the circulating water pump (8) is arranged on this section of the pipeline, the outer tube outlet of the shell-and-tube heat exchanger (7) is connected to the spray port (4-1), the return water port (4-2) is connected to the inlet of the water tank (9), the outlet of the water supply pump (10) is connected to the water tank (9), the air outlet of the tubular dew point evaporative cooler (4) has two pipelines, one is connected to the indoor room, the other is connected to the return air port (4-3), and the exhaust port (4-4) is connected to the outdoor room; The adsorption air pipeline subsystem includes an adsorption fan (1-2), drying bed No. 1 (3-1), drying bed No. 2 (3-2), a temperature and humidity sensor (11), a tubular dew point evaporative cooler (4) and a valve; when drying bed No. 1 (3-1) is an adsorption drying bed, the outlet of the adsorption fan (1-2) is connected to the inlet of drying bed No. 1 (3-1), the outlet of drying bed No. 1 (3-1) is connected to the air inlet of the tubular dew point evaporative cooler (4), the temperature and humidity sensor (11) is on the air duct connecting the two, the air outlet of the tubular dew point evaporative cooler (4) has two pipelines, one is connected to the room, and the other is connected to the return air port (4-3); when drying bed No. 2 (3-2) is an adsorption drying bed, the drying bed No. 1 (3-1) in the step can be replaced; The regeneration air piping subsystem includes a regeneration fan (1-1), a finned heat exchanger (2), a drying bed No. 1 (3-1), a drying bed No. 2 (3-2), relevant valves and relevant pipelines; when the drying bed No. 1 (3-1) is a regeneration drying bed, the outlet of the regeneration fan (1-1) is connected to the air inlet of the finned heat exchanger (2), the air outlet of the finned heat exchanger (2) is connected to the inlet of the drying bed No. 1 (3-1), and the outlet of the drying bed No. 1 (3-1) is connected to the outside; when the drying bed No. 2 (3-2) is a regeneration drying bed, the drying bed No. 1 (3-1) in the step can be replaced.

2. The heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system according to claim 1, characterized in that: When the desiccant bed No. 1 (3-1) is an adsorption desiccant bed and the desiccant bed No. 2 (3-2) is a regeneration desiccant bed, valve one (12-1), valve four (12-4), valve five (12-5) and valve eight (12-8) are opened, and valve two (12-2), valve three (12-3), valve six (12-6) and valve seven (12-7) are closed; when the desiccant bed No. 2 (3-2) is an adsorption desiccant bed and the desiccant bed No. 1 (3-1) is a regeneration desiccant bed, valve one (12-1), valve four (12-4), valve five (12-5) and valve eight (12-8) are closed, and valve two (12-2), valve three (12-3), valve six (12-6) and valve seven (12-7) are opened.

3. The heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system according to claim 1, characterized in that: The water tank (9) is replenished with water by the water replenishment pump (10), collects and recycles the condensed water generated by the tubular dew-point evaporative cooler (4), and is arranged in the circulation pipeline of the tubular dew-point evaporative cooling subsystem to ensure the stability of the water pressure of the tubular dew-point evaporative cooling subsystem and maintain the operation of the system.

4. The heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system according to claim 1, characterized in that: The drying bed No. 1 (3-1) and the drying bed No. 2 (3-2) jointly bear the latent heat load of the air conditioning system.

5. The heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system according to claim 1, characterized in that: The tubular dew-point evaporative cooler (4) bears the sensible heat load of the air-conditioning system.

6. The heat pump driven regenerative desiccant bed dehumidification dew point evaporative cooling air conditioning system according to claim 1, characterized in that: The top and bottom of the drying bed No. 1 (3-1) and the drying bed No. 2 (3-2) are both provided with wire mesh, and the pipelines are connected using flanges.

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