Jet compression air supply two-stage refrigeration heat recovery rotary wheel dehumidification system

Abstract

The utility model relates to the technical field of rotary wheel dehumidification equipment, in particular to a jet compression air supply two-stage refrigeration heat recovery rotary wheel dehumidification system which comprises a rotary wheel dehumidification system, a jet compression air supply two-stage refrigeration system, a high-temperature heat pump system and a water heat storage circulation system which are coupled with one another. A refrigerant outlet of the medium-temperature condenser communicates with refrigerant inlets of the medium-temperature first evaporator and the medium-temperature second evaporator and an inlet of the ejector through pipelines, a refrigerant outlet of the first evaporator communicates with the inlet of the ejector through a pipeline, and an outlet of the ejector communicates with the gas-liquid separator through a pipeline. The gas-liquid separator is communicated with a refrigerant inlet of the medium-temperature second evaporator and an inlet of the medium-temperature air supply compressor through pipelines, a refrigerant outlet of the medium-temperature second evaporator is communicated with the medium-temperature air supply compressor through a pipeline, and the medium-temperature air supply compressor is communicated with a refrigerant inlet of the medium-temperature condenser through a pipeline. The system has the effects that the throttling loss of the system is reduced, and the overall refrigerating capacity of the system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of rotary dehumidification equipment, and in particular to a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation. Background Art

[0002] In a dehumidifying rotary air conditioning system, regeneration energy consumption is one of the main energy consumptions in the dehumidifying rotary air conditioning system. In order to reduce the regeneration energy consumption, many researchers have applied refrigeration or heat pump technology to rotary dehumidifiers. On the one hand, the condensation heat generated can offset part of the regeneration energy consumption, and on the other hand, the generated cold can be used for fresh air cooling, which provides a way to save energy and increase efficiency of dehumidifiers. However, the existing steam compression heat pump system will also generate a large amount of electricity consumption during operation, especially when dealing with a large amount of regeneration air, and the system will also produce irreversible losses during the throttling process, which will undoubtedly affect the performance of the heat pump, so the energy efficiency still needs to be improved. Utility Model Content

[0003] In order to solve the problems of high energy consumption and low heat pump performance of the existing dehumidification rotary air-conditioning system in the prior art, the present application provides a jet compression air supplement two-stage refrigeration heat recovery rotary dehumidification system.

[0004] The present application provides a jet compression air supplement two-stage refrigeration heat recovery rotary dehumidification system adopts the following technical solution: a jet compression air supplement two-stage refrigeration heat recovery rotary dehumidification system, comprising a coupled rotary dehumidification system, a jet compression air supplement two-stage refrigeration system, a high-temperature heat pump system and a water heat storage circulation system, the rotary dehumidification system comprising a rotary wheel, a regeneration air duct is connected above the rotary wheel, a medium-temperature condenser, a high-temperature condenser, a regeneration electric heater and a waste heat recovery exchanger are sequentially arranged in the regeneration air duct, a fresh air duct is connected below the rotary wheel, a medium-temperature first evaporator and a medium-temperature second evaporator are sequentially arranged in the fresh air duct, the medium-temperature condenser, the medium-temperature first evaporator and the medium-temperature second evaporator are connected through the jet compression air supplement two-stage refrigeration system, the jet compression air supplement two-stage refrigeration system The injection-compression air-injection two-stage refrigeration system comprises an ejector, a gas-liquid separator and a medium-temperature air-injection compressor. The refrigerant outlet of the medium-temperature condenser is connected to the refrigerant inlets of the medium-temperature first evaporator and the medium-temperature second evaporator and the inlet of the ejector through a pipeline, the refrigerant outlet of the first evaporator is connected to the inlet of the ejector through a pipeline, the outlet of the ejector is connected to the gas-liquid separator through a pipeline, the gas-liquid separator is connected to the refrigerant inlet of the medium-temperature second evaporator and the inlet of the medium-temperature air-injection compressor through a pipeline, the refrigerant outlet of the medium-temperature second evaporator is connected to the medium-temperature air-injection compressor through a pipeline, and the medium-temperature air-injection compressor is connected to the refrigerant inlet of the medium-temperature condenser through a pipeline.

[0005] By adopting the above technical solution, the fresh air is cooled by the medium-temperature first evaporator and the medium-temperature second evaporator and then dehumidified by the rotor. The regenerated air is heated by the medium-temperature condenser and the high-temperature condenser and then transported to the rotor to regenerate the rotor. The high-pressure refrigerant liquid at the outlet of the medium-temperature condenser enters the ejector as the ejection fluid (primary fluid). The liquid in the outlet pipe of the medium-temperature condenser enters the medium-temperature first evaporator after throttling and evaporates into low-pressure refrigerant gas (secondary fluid). The low-pressure refrigerant gas is ejected into the ejector and mixed with the ejection fluid in the ejector mixing chamber and in the expansion section. After pressurization, the two-phase fluid at the outlet of the ejector enters the gas-liquid separator, which separates the refrigerant gas and liquid. The gas serves as an air supply circuit and enters the air supply port of the medium-temperature air supply compressor. The liquid is throttled and mixed with the throttled fluid in the pipeline connected to the medium-temperature condenser and the medium-temperature second evaporator, and enters the medium-temperature second evaporator together. In the medium-temperature second evaporator, heat exchange is carried out with the fresh air to reduce the temperature of the fresh air. The refrigerant after heat exchange then returns to the medium-temperature air supply compressor, which compresses the refrigerant into a high-pressure refrigerant liquid and transports it to the medium-temperature condenser through a pipeline for circulation.

[0006] Optionally, the high-temperature heat pump system includes a high-temperature evaporator connected to the high-temperature condenser through a pipeline.

[0007] By adopting the above technical solution, the high-temperature evaporator transports the heating medium to the high-temperature condenser through the pipeline, and the heating medium exchanges heat with the regeneration air in the high-temperature condenser to heat the regeneration air.

[0008] Optionally, a high-temperature expansion valve is provided in the inlet pipe of the high-temperature condenser, and a high-temperature compressor is provided in the outlet pipe of the high-temperature condenser.

[0009] By adopting the above technical solution, the high-temperature expansion valve is used to throttle the heating medium in the pipeline, and the high-temperature compressor is used to compress the heating medium.

[0010] Optionally, the water heat storage circulation system includes a water storage tank, one side of the water storage tank is connected to the waste heat recovery exchanger through a pipeline, and the other side of the water storage tank is connected to the high-temperature evaporator through a pipeline.

[0011] By adopting the above technical scheme, water is stored in a water tank, and the water is transported to the waste heat recovery exchanger through a pipeline connecting the water tank and the waste heat recovery exchanger, and heat exchange is performed with the regeneration air in the waste heat recovery exchanger to recover the waste heat of the regeneration air. The heated water is transported to the water tank through a pipeline for storage, and the hot water in the water tank is transported to the high-temperature evaporator through a pipeline, and heat exchange is performed with the heating medium in the high-temperature evaporator. The heating medium absorbs the heat of the water and evaporates from a gas-liquid two-phase state to become a saturated gas.

[0012] Optionally, a second circulating water pump is provided in the pipeline connecting the water storage tank and the waste heat recovery exchanger, and a first circulating water pump is provided in the pipeline connecting the water storage tank and the high-temperature evaporator.

[0013] By adopting the above technical solution, the first circulating water pump is used to circulate water between the water storage tank and the high-temperature evaporator, and the second circulating water pump is used to circulate water between the water storage tank and the waste heat recovery exchanger.

[0014] Optionally, a first solenoid valve and a first medium-temperature expansion valve are sequentially arranged in a pipeline connecting the medium-temperature condenser and the refrigerant inlet of the first medium-temperature evaporator.

[0015] Optionally, a medium-temperature second expansion valve is provided in the pipeline connecting the medium-temperature condenser and the refrigerant inlet of the medium-temperature second evaporator.

[0016] Optionally, a medium-temperature third expansion valve is provided in the pipeline connecting the gas-liquid separator and the medium-temperature second evaporator.

[0017] Optionally, the fresh air duct connected between the medium-temperature first evaporator and the medium-temperature second evaporator is connected to the return air duct.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. This application utilizes a reliable and cost-effective two-phase ejector under two-phase conditions without mechanical energy consumption and moving parts, thereby reducing the throttling loss of the system. At the same time, the refrigerant pressure at the evaporator outlet is increased to the level of the compressor air supply pressure through the high-pressure refrigerant liquid at the condenser outlet. The two-stage evaporation greatly improves the overall refrigeration capacity of the system. For the rotary dehumidification system, it can replace the fresh air surface cooler and the intermediate surface cooler. The unit can achieve an integrated design, reduce dependence on the external cold water system, save space, and facilitate installation and maintenance.

[0020] 2. The two-stage evaporation system can be easily expanded or adjusted according to changes in demand, and can flexibly switch between the two-stage evaporation system and the traditional steam compression system. It has strong adaptability and can meet the needs of various application scenarios;

[0021] 3. The water heat storage circulation system realizes the recovery of waste heat from regenerated exhaust air, providing a stable heat source for the operation of high-temperature heat pumps. The compressor air replenishment and enthalpy increase technology is applied to increase the compressor inlet pressure of some refrigerants, reduce system energy consumption, and achieve operation under lower evaporation temperature conditions. The high-temperature heat pump cooperates with the water heat storage circulation system to provide a stable heating source for the regenerated air. The circulating water volume can be flexibly controlled according to the heat demand to ensure system balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a system schematic diagram of a jet compression air supplement two-stage refrigeration heat recovery rotary dehumidification system in an embodiment of the present application.

[0023] Figure 2 It is a system schematic diagram of an injection compression air supplement two-stage refrigeration system in an injection compression air supplement two-stage refrigeration heat recovery rotary dehumidification system in an embodiment of the present application.

[0024] Figure 3 It is a system schematic diagram of a high-temperature heat pump system and a water heat storage circulation system in an injection compression air supplementation two-stage refrigeration heat recovery rotary dehumidification system in an embodiment of the present application.

[0025] Explanation of the reference numerals: 1. Rotary dehumidification system; 2. Injection compression air supply two-stage refrigeration system; 3. High-temperature heat pump system; 4. Water heat storage circulation system; 101. Medium-temperature air supply compressor; 102. Medium-temperature condenser; 103. Medium-temperature first expansion valve; 104. Medium-temperature first evaporator; 105. Injector; 106. Medium-temperature second expansion valve; 107. Gas-liquid separator; 108. Medium-temperature third expansion valve; 109. Medium-temperature second evaporator; 110. First solenoid valve; 111. Second solenoid valve; 112. Rotary wheel; 113. Processing fan; 114. High-temperature condenser; 115. Regeneration electric heater; 116. Waste heat recovery exchanger; 117. Regeneration fan; 118. High-temperature compressor; 119. High-temperature evaporator; 120. High-temperature expansion valve; 121. First circulating water pump; 122. Water storage tank; 123. Second circulating water pump. DETAILED DESCRIPTION

[0026] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0027] See also Figure 1-3 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this application, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical content disclosed in this application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this application. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this application without substantially changing the technical content.

[0028] The following is combined with Figure 1-3 This application is described in further detail.

[0029] This embodiment discloses an injection compression air supplement two-stage refrigeration heat recovery rotary dehumidification system.

[0030] Reference Figure 1 A jet compression air supplement two-stage refrigeration heat recovery rotary dehumidification system is coupled by a rotary dehumidification system 1, a jet compression air supplement two-stage refrigeration system 2, a high-temperature heat pump system 3 and a water heat storage circulation system 4. The rotary dehumidification system 1 includes a rotor 112, and a regeneration air duct is connected above the rotor 112. The regeneration air duct is sequentially provided with a medium-temperature condenser 102, a high-temperature condenser 114, a regeneration electric heater 115 and a regeneration fan 117. The regeneration fan 117 heats the regeneration air sequentially through the medium-temperature condenser 102, the high-temperature condenser 114 and the regeneration electric heater 115 through the pipeline. The rotor 112 is then regenerated, and the regenerated air discharged from the rotor 112 is discharged after recovering heat through the waste heat recovery exchanger 116. A fresh air duct is connected to the bottom of the rotor 112, and a medium-temperature first evaporator 104, a medium-temperature second evaporator 109 and a processing fan 113 are arranged in sequence in the fresh air duct. A return air duct is also connected to the pipe between the medium-temperature first evaporator 104 and the medium-temperature second evaporator 109. After being cooled by the medium-temperature first evaporator 104, the fresh air is mixed with the return air and enters the medium-temperature second evaporator 109. After being cooled by the medium-temperature second evaporator 109, the fresh air enters the rotor 112 for dehumidification.

[0031] Reference Figure 2The injection compression air-supplementing two-stage refrigeration system 2 comprises a medium-temperature condenser 102, a medium-temperature first evaporator 104, a medium-temperature second evaporator 109, an ejector 105, a gas-liquid separator 107 and a medium-temperature air-supplementing compressor 101. The refrigerant outlet of the medium-temperature condenser 102 is connected to the refrigerant inlets of the medium-temperature first evaporator 104 and the medium-temperature second evaporator 109 and the ejector 105 through pipelines. The first solenoid valve 110 and the medium-temperature first expansion valve 103 are sequentially arranged in the pipeline connecting the refrigerant inlet of the medium-temperature condenser 102 and the medium-temperature first evaporator 104. The refrigerant outlet is connected to the inlet of the ejector 105 through a pipeline, and a second solenoid valve 111 is arranged at the inlet of the ejector 105. The outlet of the ejector 105 is connected to the gas-liquid separator 107 through a pipeline, and the gas-liquid separator 107 is respectively connected to the refrigerant inlet of the medium-temperature second evaporator 109 and the inlet of the medium-temperature supplementary air compressor 101 through pipelines. The refrigerant outlet of the medium-temperature second evaporator 109 is connected to the medium-temperature supplementary air compressor 101 through a pipeline, and the medium-temperature supplementary air compressor 101 is connected to the refrigerant inlet of the medium-temperature condenser 102 through a pipeline, and the medium-temperature condenser 102 is connected to the refrigerant inlet of the medium-temperature second evaporator 109. A medium-temperature second expansion valve 106 is provided in the pipeline, and a medium-temperature third expansion valve 108 is provided in the pipeline connecting the gas-liquid separator 107 and the medium-temperature second evaporator 109. The high-pressure refrigerant liquid at the outlet of the medium-temperature condenser 102 enters the ejector 105 as an ejection fluid (primary fluid). The liquid in the outlet pipeline of the medium-temperature condenser 102 enters the medium-temperature first evaporator 104 after throttling and evaporates into a low-pressure refrigerant gas (secondary fluid). The low-pressure refrigerant gas is ejected into the ejector 105 and mixed with the ejection fluid in the mixing chamber of the ejector 105, and is pressurized in the expansion section. The two-phase fluid at the outlet of the ejector 105 enters The gas-liquid separator 107 separates the refrigerant gas and liquid. The gas serves as an air supply circuit and enters the air supply port of the medium-temperature air supply compressor 101. The liquid is throttled and mixed with the throttled fluid in the pipeline connected to the medium-temperature condenser 102 and the medium-temperature second evaporator 109, and enters the medium-temperature second evaporator 109 together. In the medium-temperature second evaporator 109, heat exchange is carried out with the fresh air to reduce the temperature of the fresh air. The refrigerant after heat exchange is then returned to the medium-temperature air supply compressor 101. The medium-temperature air supply compressor 101 compresses the refrigerant into a high-pressure refrigerant liquid and transports it to the medium-temperature condenser 102 through a pipeline for circulation.

[0032] Reference Figure 3The high-temperature heat pump system 3 includes a high-temperature evaporator 119 connected to the high-temperature condenser 114 through a pipeline, a high-temperature expansion valve 120 is provided in the inlet pipeline of the high-temperature condenser 114, and a high-temperature compressor 118 is provided in the outlet pipeline of the high-temperature condenser 114. The water heat storage circulation system 4 includes a water storage tank 122, one side of the water storage tank 122 is connected to the waste heat recovery exchanger 116 through a pipeline, and the other side of the water storage tank 122 is connected to the high-temperature evaporator 119 through a pipeline. A second circulating water pump 123 is provided in the pipeline connecting the water storage tank 122 and the waste heat recovery exchanger 116, and a first circulating water pump 121 is provided in the pipeline connecting the water storage tank 122 and the high-temperature evaporator 119. Water is stored in the water storage tank 122, and the water is transported to the waste heat recovery exchanger 116 through the pipeline connecting the water storage tank 122 and the waste heat recovery exchanger 116 and the second circulating water pump 123. In the heat recovery exchanger 116, heat exchange is performed with the regeneration air in the waste heat recovery exchanger 116 to recover the waste heat of the regeneration air, and the heated water is then transported to the water storage tank 122 through a pipeline for storage, and the hot water in the water storage tank 122 is transported to the high-temperature evaporator 119 through the first circulating water pump 121 and the pipeline, and heat exchange is performed with the heating medium in the high-temperature evaporator 119. The heating medium absorbs the heat of the water and evaporates from a gas-liquid two-phase state to become a saturated gas. The high-temperature compressor 118 transports the heating medium from the high-temperature evaporator 119 to the high-temperature condenser 114 through a pipeline, and the heating medium exchanges heat with the regeneration air in the high-temperature condenser 114 to heat the regeneration air, and then the heating medium enters the high-temperature compressor 118, and the high-temperature compressor 118 compresses the heating medium from the gas phase to the liquid phase and then transports it to the high-temperature evaporator 119 for circulation.

[0033] In summary, the present application utilizes a reliable and cost-effective two-phase ejector under two-phase conditions without mechanical energy consumption and moving parts, thereby reducing the throttling loss of the system. At the same time, the refrigerant pressure at the evaporator outlet is increased to the level of the compressor air supply pressure through the high-pressure refrigerant liquid at the condenser outlet. The two-stage evaporation greatly improves the overall refrigeration capacity of the system. For the rotary dehumidification system, it can replace the fresh air surface cooler and the intermediate surface cooler. The unit can be designed in an integrated manner, reducing the dependence on the external cold water system, saving space, and facilitating installation and maintenance. The two-stage evaporation system can be easily expanded or adjusted according to changes in demand, and flexible switching between the two modes of the two-stage evaporation system and the traditional steam compression system can be achieved. It has strong adaptability and can meet the needs of various application scenarios. The water heat storage circulation system realizes the recovery of waste heat from regenerative exhaust air, provides a stable heat source for the operation of the high-temperature heat pump, applies the compressor air supply enthalpy increase technology, increases the compressor inlet pressure of some refrigerants, reduces the system energy consumption, and can achieve operation under lower evaporation temperature conditions. The high-temperature heat pump cooperates with the water heat storage circulation system to provide a stable heating source for the regenerated air, and can flexibly control the circulating water volume according to the heat demand to ensure the balance of the system. Therefore, the present application effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0034] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present application shall still be included in the protection scope of the present application.

Claims

1. A jet compression air supplement two-stage refrigeration heat recovery rotary dehumidification system, comprising a coupled rotary dehumidification system (1), a jet compression air supplement two-stage refrigeration system (2), a high-temperature heat pump system (3) and a water heat storage circulation system (4), wherein the rotary dehumidification system (1) comprises a rotary wheel (112), the rotary wheel (112) is connected to a regeneration air duct above, and a medium-temperature condenser (102), a high-temperature condenser (114), a regeneration electric heater (115) and a waste heat recovery exchanger (116) are arranged in sequence in the regeneration air duct, the rotary wheel (112) is connected to a fresh air duct below, and a medium-temperature first evaporator (104) and a medium-temperature second evaporator (109) are arranged in sequence in the fresh air duct, and the medium-temperature condenser (102), the medium-temperature first evaporator (104) and the medium-temperature second evaporator (109) are connected via the jet compression air supplement two-stage refrigeration system (2), It is characterized in that The ejector-compression air-supplementing two-stage refrigeration system (2) comprises an ejector (105), a gas-liquid separator (107) and a medium-temperature air-supplementing compressor (101); the refrigerant outlet of the medium-temperature condenser (102) is connected to the refrigerant inlets of the medium-temperature first evaporator (104) and the medium-temperature second evaporator (109) and the inlet of the ejector (105) through pipelines; the refrigerant outlet of the medium-temperature first evaporator (104) is connected to the inlet of the ejector (105) through a pipeline. The outlet of the ejector (105) is connected to the gas-liquid separator (107) via a pipeline, the gas-liquid separator (107) is connected to the refrigerant inlet of the medium-temperature second evaporator (109) and the inlet of the medium-temperature air-making compressor (101) via pipelines, the refrigerant outlet of the medium-temperature second evaporator (109) is connected to the medium-temperature air-making compressor (101) via a pipeline, and the medium-temperature air-making compressor (101) is connected to the refrigerant inlet of the medium-temperature condenser (102) via a pipeline.

2. According to claim 1, a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation, Features: The high-temperature heat pump system (3) comprises a high-temperature evaporator (119) connected to the high-temperature condenser (114) via a pipeline.

3. According to claim 2, a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation, Features: A high-temperature expansion valve (120) is provided in the inlet pipe of the high-temperature condenser (114), and a high-temperature compressor (118) is provided in the outlet pipe of the high-temperature condenser (114).

4. According to claim 2, a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation, Features: The water heat storage circulation system (4) comprises a water storage tank (122), one side of the water storage tank (122) being connected to the waste heat recovery exchanger (116) via a pipeline, and the other side of the water storage tank (122) being connected to the high-temperature evaporator (119) via a pipeline.

5. According to claim 4, a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation, Features: A second circulating water pump (123) is provided in a pipeline connecting the water storage tank (122) and the waste heat recovery exchanger (116), and a first circulating water pump (121) is provided in a pipeline connecting the water storage tank (122) and the high-temperature evaporator (119).

6. According to claim 1, a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation, Features: A first solenoid valve (110) and a first medium-temperature expansion valve (103) are sequentially arranged in a pipeline connecting the medium-temperature condenser (102) and the refrigerant inlet of the first medium-temperature evaporator (104).

7. According to claim 1, a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation, Features: A medium-temperature second expansion valve (106) is provided in a pipeline connecting the medium-temperature condenser (102) and the refrigerant inlet of the medium-temperature second evaporator (109).

8. According to claim 1, a two-stage refrigeration heat recovery rotary dehumidification system with injection compression and air supplementation, Features: A medium-temperature third expansion valve (108) is provided in a pipeline connecting the gas-liquid separator (107) and the medium-temperature second evaporator (109).

9. The injection compression air supplement two-stage refrigeration heat recovery rotary dehumidification system according to claim 1, Features: The fresh air duct connected between the medium-temperature first evaporator (104) and the medium-temperature second evaporator (109) is connected to the return air duct.

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