An air working fluid refrigeration system based on multi-tube bundle array air compression

Abstract

The application discloses a kind of air working substance refrigeration systems based on multi-tube bundle array air compression, belong to novel refrigeration, energy storage and energy-saving application field, it is by air intake unit, multi-tube bundle array air compression unit, refrigeration heat exchange unit in series sequentially formed;Air intake unit is for into multi-tube bundle array air compression unit into air, it is by air intake control valve, air pressure gauge and pressure relief safety valve is formed;Multi-tube bundle array air compression unit is by air compression cavity, heat storage liquid cavity, compressed liquid cavity, booster circuit and heat dissipation circuit is formed;Refrigeration heat exchange unit is for realizing air expansion refrigeration, it is by air outlet control valve, regenerative heat exchanger, expander, refrigeration heat exchanger is formed.The compressor of the present application is coupled with condenser in traditional air working substance refrigeration and forms multi-tube bundle array air compression unit, enhances heat dissipation to improve the efficiency of air compression, to improve the refrigeration cycle efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of new refrigeration, energy storage and energy saving applications, and particularly relates to an air working substance refrigeration system based on a multi-tube bundle array air compression. BACKGROUND

[0002] A refrigeration system plays an important role in people's production and daily life, and its work mainly relies on a refrigeration cycle to realize the phase change heat absorption and release of a refrigerant through compression, condensation, throttling expansion, evaporation and other processes to achieve the effect of circulating refrigeration. In order to ensure good refrigeration performance, the refrigerant is often selected to be a substance with high boiling point, high heat of vaporization and easy phase change. Traditional refrigerants include chlorofluorocarbons, hydrochlorofluorocarbons and hydrofluorocarbons. The first two have different degrees of damage to the ozone layer, and the latter has a certain impact on climate warming.

[0003] In recent years, relevant research scholars have carried out in-depth research on the application of new refrigerants, including carbon dioxide (R744), ammonia (R717), air (R729) and various mixed refrigerants, etc. have obtained related applications, and have different characteristics and applicability: the carbon dioxide condensation process works in a supercritical state, ammonia is suitable for adsorption refrigeration application, and different refrigerants can be mixed in proportion to achieve lower refrigeration temperature and better refrigeration efficiency. Air compression refrigeration has also been studied in recent years. Due to the extremely low boiling point of air, it is difficult to use the phase change process to produce cold, so it can only work in the gaseous region. After compression, the adiabatic expansion of the expander is reduced to a low temperature, and then the low-temperature air is used for heat absorption refrigeration to realize a pure gaseous refrigeration cycle. Compared with the heat absorption of the phase change process of the refrigerant, the heat absorption of the low-temperature air may have a gap in efficiency, but the high-pressure air can significantly recover the pressure energy for work during the expansion process, and can further increase the enthalpy drop and improve the refrigeration capacity. It is especially suitable for special refrigeration application occasions where the phase change of the working substance is not allowed, and air is easy to obtain, environmentally friendly and pollution-free, low in cost, and can be replenished at any time from the environment, and has broad application prospects.

[0004] The power consumption in the air compression process is an important factor affecting the refrigeration efficiency and performance. When the heat dissipation performance is poor, the temperature of the gas during compression will rise significantly, and the internal energy of the gas will increase, which will increase the additional power consumption loss and increase the working load of the cooling link.

[0005] Therefore, how to improve the above problems and optimize the heat dissipation in the compression process so that the compression process is as close to the ideal isothermal process as possible is an important research topic for those skilled in the art. SUMMARY

[0006] Therefore, the application provides an air working substance refrigeration system based on multi-tube bundle array air compression, which aims to realize air expansion refrigeration after air compression, reduce power consumption in the compression process, recycle and reuse waste heat in the compression process and the like.

[0007] To achieve the above object, the application adopts the following technical scheme.

[0008] The air working substance refrigeration system based on multi-tube bundle array air compression comprises a gas inlet unit, a multi-tube bundle array air compression unit and a refrigeration heat exchange unit which are sequentially connected in series.

[0009] The gas inlet unit is used for introducing air into the multi-tube bundle array air compression unit, and comprises a gas inlet control valve, a gas pressure gauge and a pressure relief safety valve.

[0010] The multi-tube bundle array air compression unit comprises an air compression cavity, a heat storage liquid cavity, a compression liquid cavity, a pressure increasing circuit and a heat dissipation circuit.

[0011] The refrigeration heat exchange unit is used for realizing air expansion refrigeration, and comprises a gas outlet control valve, a heat recovery heat exchanger, an expander and a refrigeration heat exchanger.

[0012] The system of the application reduces the temperature rise in the compression process by using heat storage working substance and external cold source, thereby reducing power consumption.

[0013] Preferably, the pressurization circuit comprises a liquid storage tank, a pressurization hydraulic pump, an inlet control valve, an outlet control valve, the outlet of the liquid storage tank is connected with the inlet of the pressurization hydraulic pump, the outlet of the pressurization hydraulic pump is connected with the inlet of the inlet control valve, the outlet of the inlet control valve is connected with the inlet of the compressed liquid cavity, the outlet of the compressed liquid cavity is connected with the inlet of the outlet control valve, and the outlet of the outlet control valve is connected with the inlet of the liquid storage tank.

[0014] Preferably, the compressed liquid in the pressurization circuit and the compressed liquid cavity is selected from liquid materials with low air solubility and good heat conduction performance.

[0015] Preferably, the heat dissipation circuit comprises a circulating hydraulic pump, a heating heat exchanger and a liquid flow control valve, the outlet of the circulating hydraulic pump is connected with the inlet of the heat storage liquid cavity, the outlet of the heat storage liquid cavity is connected with the inlet of the liquid flow control valve, the outlet of the liquid flow control valve is connected with the hot end inlet of the heating heat exchanger, the hot end outlet of the heating heat exchanger is connected with the inlet of the circulating hydraulic pump, and the to-be-heated working medium is input from the cold end inlet of the heating heat exchanger and output from the cold end outlet of the heating heat exchanger after being heated.

[0016] Preferably, the heat storage liquid in the heat dissipation circuit and the heat storage liquid cavity is selected from liquid materials with high specific heat, low viscosity and good safety for heat exchange.

[0017] Preferably, the heating heat exchanger, the regenerative heat exchanger and the refrigeration heat exchanger are sleeve-type heat exchangers or plate-fin heat exchangers, or other types of heat exchangers in the prior art.

[0018] Preferably, the wall material of the air compression cavity is selected from materials with good pressure resistance and heat conduction performance, preferably metal.

[0019] Preferably, the outer wall of the total cavity is directly in contact with the heat storage liquid for heat exchange, and metal fins or other heat dissipation structures can be added to the outer wall of the total cavity to improve the heat exchange efficiency.

[0020] Preferably, the pipes involved in the system need to have good pressure resistance and heat preservation performance and can withstand high pressure and low temperature conditions for a long time.

[0021] According to the above technical solution, compared with the prior art, the present application has the following beneficial effects:

[0022] The air refrigeration flow path in the system of the present application comprises, in sequence, air, an air inlet control valve, an air pressure gauge, a pressure relief safety valve, an air compression cavity, an air outlet control valve, a regenerative heat exchanger, an expander and a refrigeration heat exchanger; the heat exchange flow path comprises, in sequence, a circulating hydraulic pump, a heat storage liquid cavity, a liquid flow control valve and a heating heat exchanger; and the air pressurization flow path comprises, in sequence, a liquid storage tank, a pressurization hydraulic pump, an inlet control valve, a compressed liquid cavity and an outlet control valve.

[0023] Air is pre-filtered and dried before entering the air compression chamber, then compressed by the pressurized hydraulic pump, and at the same time, the air in the chamber is cooled by the heat storage liquid chamber to achieve isothermal compression, then the high-pressure gas is released and enters the expander to expand and cool. The compressor and condenser in the traditional air working fluid refrigeration are coupled to form a multi-tube bundle array air compression unit, the heat dissipation is enhanced to improve the efficiency of air compression, thereby improving the refrigeration cycle efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0025] Figure 1 It is a principle diagram of an air working fluid refrigeration system based on multi-tube bundle array air compression according to the present application;

[0026] In the figure:

[0027] 1-multi-tube bundle array air compression unit, 1a-air compression chamber, 1b-heat storage liquid chamber, 1c-compressed liquid chamber, 2-outlet air control valve, 3-heat recovery heat exchanger, 4-expander, 5-refrigeration heat exchanger, 6-to-be-cooled working fluid, 7-cooled working fluid, 8-circulating hydraulic pump, 9-heating heat exchanger, 10-to-be-heated working fluid, 11-heated working fluid, 12-liquid flow control valve, 13-air, 14-inlet air control valve, 15-air pressure gauge, 16-pressure relief safety valve, 17-liquid storage tank, 18-pressurized hydraulic pump, 19-inlet liquid control valve, 20-outlet liquid control valve. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Example:

[0032] like Figure 1 As shown in the figure, this invention discloses an air-based refrigerant refrigeration system based on multi-tube array air compression, which consists of an air intake unit, a multi-tube array air compression unit 1, and a refrigeration heat exchange unit connected in series. Within this system, the temperature of air decreases after isothermal compression and expansion, generating cooling capacity for refrigeration needs. Simultaneously, the heat generated during compression is dissipated in real time through the circulation of a heat storage liquid for heating and other applications, reducing power consumption and achieving efficient energy utilization.

[0033] The intake unit, comprising an intake control valve 14, a barometer 15, and a pressure relief valve 16, is used to introduce air 13 into the multi-tube array air compression unit 1. The intake control valve 14 has its inlet connected to the ambient air 13 and its outlet connected to the inlet of the air compression chamber 1a in the multi-tube array air compression unit 1 via an intake pipe. The pressure relief valve 16 has its inlet connected to the intake pipe and its outlet connected to the ambient air 13. The barometer 15 is installed on the intake pipe between the intake control valve 14 and the pressure relief valve 16. The ambient air 13 is pre-filtered and dried before entering the inlet of the intake control valve 14.

[0034] The multi-tube bundle array air compression unit 1 consists of an air compression chamber 1a, a heat storage liquid chamber 1b, a compressed liquid chamber 1c, a pressurization circuit, and a heat dissipation circuit. The lower part of the air compression chamber 1a is the compressed liquid chamber 1c, and the two are completely connected. The heat storage liquid chamber 1b is installed on the outer wall of the total cavity formed by the air compression chamber 1a and the compressed liquid chamber 1c, and the heat storage liquid chamber 1b is a composite circuit composed of multiple tube bundles connected in columns.

[0035] The booster circuit is located outside the main cavity and is connected to the compressed liquid cavity 1c, and is used to boost the air 13 in the air compression cavity 1a.

[0036] Specifically, the pressurization circuit comprises a liquid storage tank 17, a pressurization hydraulic pump 18, an inlet control valve 19, and an outlet control valve 20. The outlet of the liquid storage tank 17 is connected to the inlet of the pressurization hydraulic pump 18. The outlet of the pressurization hydraulic pump 18 is connected to the inlet of the inlet control valve 19. The outlet of the inlet control valve 19 is connected to the inlet of the compressed liquid chamber 1c. The outlet of the compressed liquid chamber 1c is connected to the inlet of the outlet control valve 20. The outlet of the outlet control valve 20 is connected to the inlet of the liquid storage tank 17.

[0037] Meanwhile, the compressed liquid circulating in the pressurization circuit and the compressed liquid chamber 1c should be a liquid material with low air solubility and good heat conduction performance.

[0038] The heat dissipation circuit is arranged outside the total cavity and is in communication with the heat storage liquid chamber 1b, and is used for dissipating heat from the air compression chamber 1a.

[0039] Specifically, the heat dissipation circuit comprises a circulating hydraulic pump 8, a heating heat exchanger 9, and a liquid flow control valve 12. The outlet of the circulating hydraulic pump 8 is connected to the inlet of the heat storage liquid chamber 1b. The outlet of the heat storage liquid chamber 1b is connected to the inlet of the liquid flow control valve 12. The outlet of the liquid flow control valve 12 is connected to the hot end inlet of the heating heat exchanger 9. The hot end outlet of the heating heat exchanger 9 is connected to the inlet of the circulating hydraulic pump 8. The to-be-heated working medium 10 is input from the cold end inlet of the heating heat exchanger 9. The heated working medium 11 is output from the cold end outlet of the heating heat exchanger 9.

[0040] Meanwhile, the heat storage liquid circulating in the heat dissipation circuit and the heat storage liquid chamber 1b should be a liquid material with high specific heat, low viscosity, and good safety. The liquid material is provided with circulating power by the circulating hydraulic pump 8, enters the heat storage liquid chamber 1b to participate in the recovery and storage of compressed heat, and is heated. Then, the liquid material enters the hot end inlet of the heating heat exchanger 9, is used for heating the to-be-heated working medium 10, such as low-temperature water, or is used for heating, and is returned to the circulating hydraulic pump 8 after the temperature is reduced to be pumped into the heat storage liquid chamber 1b again, so as to realize a complete working cycle.

[0041] The refrigeration heat exchange unit is used for realizing air expansion refrigeration, and is composed of an outlet control valve 2, a regenerative heat exchanger 3, an expander 4, and a refrigeration heat exchanger 5. The outlet of the air compression chamber 1a is connected to the inlet of the outlet control valve 2. The outlet of the outlet control valve 2 is connected to the hot end inlet of the regenerative heat exchanger 3. The hot end outlet of the regenerative heat exchanger 3 is connected to the inlet of the expander 4. The outlet of the expander 4 is connected to the cold end inlet of the refrigeration heat exchanger 5. The cold end outlet of the refrigeration heat exchanger 5 is connected to the cold end inlet of the regenerative heat exchanger 3. The cold end outlet of the regenerative heat exchanger 3 is in communication with air 13 in the environment. The to-be-cooled working medium 6 is input from the hot end inlet of the refrigeration heat exchanger 5. The cooled working medium 7 is output from the hot end outlet of the refrigeration heat exchanger 5.

[0042] The heat exchange generator 9, the regenerative heat exchanger 3 and the refrigeration heat exchanger 5 in the application are all sleeve type heat exchangers or plate-fin type heat exchangers, or other heat exchanger types in the prior art, which will not be listed one by one here.

[0043] The wall material of the air compression cavity 1a in the application should be a material with good pressure resistance and heat conduction performance, preferably a metal. The outer wall of the total cavity is directly in contact with the heat storage liquid for heat exchange, and the outer wall surface of the total cavity can also be provided with a heat dissipation structure such as a metal fin to improve the heat exchange efficiency.

[0044] The pipeline involved in the system of the application needs to have good pressure resistance and heat preservation performance, and can withstand long-time work under high pressure and low temperature conditions.

[0045] The air refrigeration flow path in the system of the application is composed of air 13, an air inlet control valve 14, an air pressure gauge 15, a pressure relief safety valve 16, an air compression cavity 1a, an air outlet control valve 2, a regenerative heat exchanger 3, an expander 4, a refrigeration heat exchanger 5 and the like in sequence; the heat exchange flow path is composed of a circulating hydraulic pump 8, a heat storage liquid cavity 1b, a liquid flow control valve 12, a heat exchange generator 9 and the like in sequence; and the air pressurization flow path is composed of a liquid storage tank 17, a pressurized hydraulic pump 18, a liquid inlet control valve 19, a compressed liquid cavity 1c and a liquid outlet control valve 20 in sequence.

[0046] The refrigeration working process of the system is divided into an air inlet process, a compression process and an expansion process.

[0047] (1) The air inlet process: air 13 is input from the external environment and is pre-filtered and dried, at this time, the air inlet control valve 14 is opened, the air outlet control valve 2 is closed, the liquid inlet control valve 19 is closed, and the liquid outlet control valve 20 is opened, the original compressed liquid level in the compressed liquid cavity 1c is lowered, the compressed liquid returns to the liquid storage tank 17 through the liquid outlet control valve 20, and the air 13 is continuously pressed into the air compression cavity 1a through the air inlet control valve 14.

[0048] (2) The compression process: when the liquid level in the compressed liquid cavity 1c reaches the lower dead center, the air inlet control valve 14 and the air outlet control valve 2 are both closed, the liquid inlet control valve 19 is opened, and the liquid outlet control valve 20 is closed, the compression process starts, the pressurized hydraulic pump 18 continuously pumps the compressed liquid from the liquid storage tank 17 into the compressed liquid cavity 1c, under the push of the compressed liquid, the air 13 is compressed in the compression cavity, the pressure continuously rises, and a significant amount of heat is generated in this process; at the same time, the heat storage liquid in the heat exchange flow path is continuously circulated, the temperature of the heat storage liquid is lowered to the circulating lower limit when passing through the heat storage liquid cavity 1b, and the heat storage liquid continuously takes away the compression heat after fully exchanging heat with the air compression cavity 1a, so that the temperature of the compression cavity is maintained at a constant temperature, thereby reducing the power consumption of the compression process.

[0049] (3) Expansion process: when the pressure in the air compression chamber 1a reaches the requirement, the air outlet control valve 2 is opened, the liquid inlet control valve 19 is still opened, the liquid outlet control valve 20 is still closed, the pressurized liquid hydraulic pump 18 pushes the pressurized liquid level in the pressurized liquid chamber 1c to continue to rise, and the high-pressure air in the air compression chamber 1a is pushed to release to the refrigeration flow path side, the high-pressure air first enters the hot end inlet of the regenerative heat exchanger 3, is pre-cooled by the low-temperature air from the cold end outlet of the regenerative heat exchanger 3, and then enters the expander 4 to perform expansion work and can be used for power generation, in the expansion process, the air temperature is sharply reduced, and the enthalpy is significantly reduced, and then enters the cold end inlet of the refrigeration heat exchanger 5 to perform heat exchange refrigeration on the to-be-cooled working medium 6 as a cold source, because the low-pressure air output by the expander 4 has a very low temperature, there is still a certain residual cold after one-stage heat exchange, in order to further recover the cold, the cold end output of the refrigeration heat exchanger 5 is connected to the cold end input of the regenerative heat exchanger 3, and the cold recovered by the regenerative heat exchanger 3 is output from the cold end of the regenerative heat exchanger 3 and discharged into the air 13. When the pressurized liquid level in the pressurized liquid chamber 1c reaches the top dead center, the air outlet control valve 2 is closed, the air inlet control valve 14 is opened, the liquid inlet control valve 19 is closed, and the liquid outlet control valve 20 is opened, and the air inlet process is switched to restart the air inlet.

[0050] The system can flexibly adjust the flow of the heat storage fluid, the air inlet flow, the expansion ratio and other important parameters according to different refrigeration and heating work requirements, and realizes different refrigeration and heating power outputs.

[0051] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0052] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air working fluid refrigeration system based on multi-tube bundle array air compression, characterized by, The air intake unit, the multi-tube bundle array air compression unit and the refrigeration heat exchange unit are connected in series. The air intake unit is used for introducing air into the multi-tube bundle array air compression unit, and is composed of an air intake control valve, an air pressure gauge and a pressure relief safety valve. The inlet of the air intake control valve is connected with the air in the environment, and the outlet is connected with the air compression cavity in the multi-tube bundle array air compression unit through an air intake pipeline. The inlet of the pressure relief safety valve is connected with the air intake pipeline, and the outlet is connected with the air in the environment. The air pressure gauge is installed on the air intake pipeline between the air intake control valve and the pressure relief safety valve. The multi-tube bundle array air compression unit is composed of an air compression cavity, a heat storage liquid cavity, a compression liquid cavity, a pressure boosting circuit and a heat dissipation circuit. The lower part of the air compression cavity is the compression liquid cavity, and the two are completely connected. The heat storage liquid cavity is installed on the outer wall of the total cavity composed of the air compression cavity and the compression liquid cavity, and the heat storage liquid cavity is a composite circuit composed of a plurality of tube bundles in series. The refrigeration heat exchange unit is used for realizing air expansion refrigeration, and is composed of an air outlet control valve, a heat recovery heat exchanger, an expander and a refrigeration heat exchanger. The outlet of the air compression cavity is connected with the inlet of the air outlet control valve, the outlet of the air outlet control valve is connected with the hot end inlet of the heat recovery heat exchanger, the hot end outlet of the heat recovery heat exchanger is connected with the inlet of the expander, the outlet of the expander is connected with the cold end inlet of the refrigeration heat exchanger, the cold end outlet of the refrigeration heat exchanger is connected with the cold end inlet of the heat recovery heat exchanger, and the cold end outlet of the heat recovery heat exchanger is connected with the air in the environment. The to-be-cooled working medium is input from the hot end inlet of the refrigeration heat exchanger, and the cooled working medium is output from the hot end outlet of the refrigeration heat exchanger.

2. A multi-tube bundle array air compression based air working fluid refrigeration system as claimed in claim 1, wherein, The pressure boosting circuit includes a liquid storage tank, a pressure boosting hydraulic pump, an inlet liquid control valve and an outlet liquid control valve. The outlet of the liquid storage tank is connected with the inlet of the pressure boosting hydraulic pump, the outlet of the pressure boosting hydraulic pump is connected with the inlet of the inlet liquid control valve, the outlet of the inlet liquid control valve is connected with the inlet of the compression liquid cavity, the outlet of the compression liquid cavity is connected with the inlet of the outlet liquid control valve, and the outlet of the outlet liquid control valve is connected with the inlet of the liquid storage tank.

3. A multi-tube bundle array air compression based air working fluid refrigeration system according to claim 1 or 2, characterized in that, The compression liquid in the pressure boosting circuit and the compression liquid cavity is selected from liquid materials with low air solubility and good heat conduction performance.

4. A multi-tube bundle array air compression based air working fluid refrigeration system as claimed in claim 1, wherein, The heat dissipation circuit includes a circulating hydraulic pump, a heat exchanger and a liquid flow control valve. The outlet of the circulating hydraulic pump is connected with the inlet of the heat storage liquid cavity, the outlet of the heat storage liquid cavity is connected with the inlet of the liquid flow control valve, the outlet of the liquid flow control valve is connected with the hot end inlet of the heat exchanger, and the hot end outlet of the heat exchanger is connected with the inlet of the circulating hydraulic pump. The to-be-heated working medium is input from the cold end inlet of the heat exchanger, and the heated working medium is output from the cold end outlet of the heat exchanger.

5. A multi-tube bundle array air compression based air working fluid refrigeration system as claimed in claim 1 or 4 wherein, The heat storage liquid in the heat dissipation circuit and the heat storage liquid cavity is selected from liquid materials with high specific heat, low viscosity and good safety.

6. A multi-tube bundle array air compression based air working fluid refrigeration system as claimed in claim 4 wherein, The heat exchanger, the heat recovery heat exchanger and the refrigeration heat exchanger are double-pipe heat exchangers or plate-fin heat exchangers.

7. A multi-tube bundle array air compression based air working fluid refrigeration system as claimed in claim 1 wherein, The wall material of the air compression cavity is selected from materials with good pressure resistance and heat conduction performance.

8. A multi-tube bundle array air compression based air working fluid refrigeration system as claimed in claim 1, wherein, The outer wall of the total cavity is provided with a heat dissipation structure.

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