CO2 air conditioning system
By using CO2 as the refrigeration working fluid in the air-conditioning system and using the combination technology of multi-stage heat exchange and thermal acoustic components, the problem of low heating efficiency in traditional air-conditioning systems in ultra-low temperature environments is solved, achieving more efficient energy utilization and more stable system operation.
Patent Information
- Application Number
- CN202421868650.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-02
AI Technical Summary
In ultra-low temperature environments, the heating energy efficiency of traditional air conditioning systems is significantly reduced, resulting in increased energy consumption and reduced system efficiency.
An air-conditioning system using CO2 as the refrigeration working fluid is realized through the combination of the first compressor, the first heat exchanger, the throttling device and the second heat exchanger in the first circulation system, and combined with the thermal acoustic components in the second circulation system, effective heat exchange and gasification of the refrigerant in an ultra-low temperature environment.
It improves the heating energy efficiency of the air conditioning system in ultra-low temperature environments, ensures compressor efficiency and system stability. At the same time, due to the environmental protection of CO2, it has a small impact on the environment.
Smart Images
Figure CN223020569U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air conditioners, and particularly relates to a CO2 air conditioning system. Background Art
[0002] Air conditioners play an important role in improving the living environment. However, in extremely cold regions or in ultra-low temperature environments caused by extreme weather, the heating efficiency of traditional air conditioners will be significantly reduced at ultra-low temperatures, and a large amount of energy is often consumed to achieve sufficient heating effects. For example, in an ultra-low temperature environment, the temperature difference between the heat exchanger and the outside is small, so it is difficult for the heat exchanger to effectively absorb heat from the low temperature environment or release heat to the room, resulting in a significant decrease in the heat exchange efficiency of the heat exchanger.
[0003] In addition, in an ultra-low temperature environment, the suction pressure of the compressor is too low, which will lead to a decrease in the compressor efficiency, and the physical properties of some refrigerants may change. For example, the viscosity increases, the fluidity becomes poor, the evaporation temperature decreases, etc. Some refrigerants may also have problems such as condensation or incomplete phase change at ultra-low temperatures, which will affect the circulation and heat exchange efficiency of the refrigerant in the system, further resulting in a decrease in the energy efficiency of the air conditioner.
[0004] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model
[0005] In order to solve at least one of the above problems in the prior art, that is, to solve the problem of low heating energy efficiency of the existing air conditioning system in an ultra-low temperature environment, the present application provides a CO2 air conditioning system. The CO2 air conditioning system includes a first circulation system and a second circulation system. The refrigerant used in the first circulation system is CO2. The first circulation system includes:
[0006] A first compressor;
[0007] A first heat exchanger, the first port of the first heat exchanger is communicated with the exhaust port of the first compressor;
[0008] A throttling device, the first port of the throttling device is communicated with the second port of the first heat exchanger;
[0009] A second heat exchanger, the first port of the second heat exchanger is communicated with the second port of the throttling device, and the second port of the second heat exchanger is communicated with the suction port of the first compressor;
[0010] The second circulation system includes a thermoacoustic component, and the thermoacoustic component includes a hot end heat exchanger and a cold end heat exchanger. The third port of the second heat exchanger is communicated with the inlet of the hot end heat exchanger, and the fourth port of the second heat exchanger is communicated with the outlet of the hot end heat exchanger;
[0011] Wherein, a first heat exchange flow path is formed between the first port and the second port of the second heat exchanger, and a second heat exchange flow path is formed between the third port and the fourth port of the second heat exchanger; heat exchange can be carried out between the first heat exchange flow path and the second heat exchange flow path.
[0012] In the case of adopting the above technical solution, during the heating operation, the high-temperature and high-pressure refrigerant gas discharged by the compressor first enters the first heat exchanger to release heat and is transformed into a liquid state, and then passes through the throttling device and enters the second heat exchanger to absorb heat and is transformed into a gaseous state. At this time, the refrigerant can absorb outdoor heat on the one hand and absorb the heat of the hot-end heat exchanger in the thermoacoustic component on the other hand, so as to avoid the incomplete gasification of the refrigerant due to the inability to effectively absorb heat in a low-temperature environment and the too low suction pressure of the compressor, thereby ensuring the efficiency of the compressor and the heating energy efficiency of the air-conditioning system. And CO2, as a natural refrigerant, has less impact on the environment and can still maintain good heating performance in an ultra-low temperature environment, which is beneficial to the stable operation of the air-conditioning system.
[0013] In the preferred technical solution of the above CO2 air-conditioning system, the third port of the second heat exchanger is respectively communicated with the inlet of the hot-end heat exchanger or the inlet of the cold-end heat exchanger;
[0014] The fourth port of the second heat exchanger is respectively communicated with the outlet of the hot-end heat exchanger or the outlet of the cold-end heat exchanger.
[0015] In the case of adopting the above technical solution, during the cooling operation, the high-temperature and high-pressure refrigerant gas discharged by the compressor first enters the second heat exchanger to release heat. At this time, the refrigerant exchanges heat with the outdoor air on the one hand and exchanges heat with the cold-end heat exchanger on the other hand, which is beneficial to increasing the heat exchange efficiency of the refrigerant gas and improving the cooling energy efficiency of the air conditioner.
[0016] In the preferred technical solution of the above CO2 air-conditioning system, the second circulation system further includes a first valve body, a second valve body, a third valve body and a fourth valve body;
[0017] The first valve body and the third valve body are arranged in parallel. The first valve body is located between the third port of the second heat exchanger and the inlet of the cold-end heat exchanger, and the third valve body is located between the third port of the second heat exchanger and the inlet of the hot-end heat exchanger;
[0018] The second valve body and the fourth valve body are arranged in parallel. The second valve body is located between the fourth port of the second heat exchanger and the outlet of the cold-end heat exchanger, and the fourth valve body is located between the fourth port of the second heat exchanger and the outlet of the hot-end heat exchanger.
[0019] In the preferred technical solution of the above CO2 air conditioning system, the second circulation system further includes a first three-way valve and a second three-way valve. The first interface, the second interface, and the third interface of the first three-way valve are respectively communicated with the third port of the second heat exchanger, the inlet of the cold-end heat exchanger, and the inlet of the hot-end heat exchanger.
[0020] The first interface, the second interface, and the third interface of the second three-way valve are respectively communicated with the fourth port of the second heat exchanger, the outlet of the cold-end heat exchanger, and the outlet of the hot-end heat exchanger.
[0021] In the preferred technical solution of the above CO2 air conditioning system, the thermoacoustic component can be driven by the first compressor; and / or
[0022] The first compressor is set as a linear compressor or a scroll compressor.
[0023] In the case of adopting the above technical solution, the thermoacoustic component can collect the sound waves generated by the first compressor during operation, and then generate cooling capacity and heating capacity based on the thermoacoustic effect, and realize the supply of cooling capacity or heating capacity through the hot-end heat exchanger and the cold-end heat exchanger, so as to further improve the refrigeration energy efficiency or the heating energy efficiency of the air conditioning system.
[0024] In the preferred technical solution of the above CO2 air conditioning system, the thermoacoustic component further includes a second compressor, and the thermoacoustic component can be driven by the second compressor.
[0025] In the preferred technical solution of the above CO2 air conditioning system, the second compressor is set as a linear compressor.
[0026] In the preferred technical solution of the above CO2 air conditioning system, the first circulation system further includes a four-way valve. The first interface, the second interface, the third interface, and the fourth interface of the four-way valve are respectively communicated with the exhaust port of the first compressor, the suction port of the first compressor, the first port of the first heat exchanger, and the second port of the second heat exchanger.
[0027] In the preferred technical solution of the above CO2 air conditioning system, the first valve body and / or the second valve body and / or the third valve body and / or the fourth valve body are set as solenoid valves.
[0028] In the preferred technical solution of the above CO2 air conditioning system, the first circulation system further includes a dryer filter. The first port and the second port of the dryer filter are respectively communicated with the second port of the throttling device and the first port of the second heat exchanger; and / or
[0029] The throttling device is set as an electronic expansion valve; and / or
[0030] The second circulation system further includes a pump body, which is disposed between the third port of the second heat exchanger and the inlet of the hot end heat exchanger, or between the outlet of the hot end heat exchanger and the fourth port of the second heat exchanger. Description of the Drawings
[0031] The CO2 air conditioning system of the present application will be described below with reference to the drawings. In the drawings:
[0032] Figure 1 is a schematic diagram of the operation of the heating mode of the CO2 air conditioning system of the present application;
[0033] Figure 2 is a schematic diagram of the operation of the cooling mode of the CO2 air conditioning system of the present application.
[0034] List of Reference Numerals
[0035] 10. First compressor; 20. Four-way valve; 21. First interface; 22. Second interface; 23. Third interface; 24. Fourth interface; 30. First heat exchanger; 40. Throttling device; 50. Dry filter; 60. Second heat exchanger; 61. First port; 62. Second port; 63. Third port; 64. Fourth port; 70. Thermoacoustic component; 71. Hot end heat exchanger; 72. Cold end heat exchanger; 80. Pump body; 91. First valve body; 92. Second valve body; 93. Third valve body; 94. Fourth valve body. Detailed Embodiments
[0036] The preferred embodiments of the present application will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. For example, although the CO2 air conditioning system in this embodiment is introduced in combination with both heating and cooling modes, this is not intended to limit the protection scope of the present application. Without departing from the principles of the present application, those skilled in the art can apply the air conditioning system principle of the present application only to a single heating air conditioner.
[0037] It should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0038] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0039] As described in the background art, air conditioners play an important role in improving the living environment. However, in severely cold regions or extremely low temperature environments caused by extreme weather, the heating efficiency of traditional air conditioners will significantly decrease at extremely low temperatures, and a large amount of energy is often consumed to achieve sufficient heating effects. For example, in an extremely low temperature environment, the temperature difference between the heat exchanger and the outside is small, so it is difficult for the heat exchanger to effectively absorb heat from the low temperature environment or release heat to the room, resulting in a significant decrease in the heat exchange efficiency of the heat exchanger.
[0040] In addition, in an extremely low temperature environment, the suction pressure of the compressor is too low, which will cause the compressor efficiency to decrease, and the physical properties of some refrigerants may change. For example, the viscosity increases, the fluidity becomes worse, the evaporation temperature decreases, etc. Some refrigerants may also have problems such as condensation or incomplete phase change at extremely low temperatures, which will affect the circulation and heat exchange efficiency of the refrigerant in the system, further resulting in a decrease in the energy efficiency of the air conditioner.
[0041] To solve the problem of low heating energy efficiency of existing air conditioning systems in extremely low temperature environments, this application provides a CO2 air conditioning system. The CO2 air conditioning system includes a first circulation system and a second circulation system. The refrigerant used in the first circulation system is CO2. The first circulation system includes a first compressor, a first heat exchanger, a throttling device, and a second heat exchanger. The first port of the first heat exchanger is communicated with the exhaust port of the first compressor. The first port of the throttling device is communicated with the second port of the first heat exchanger. The first port of the second heat exchanger is communicated with the second port of the throttling device. The second port of the second heat exchanger is communicated with the suction port of the first compressor. The second circulation system includes a thermoacoustic component. The thermoacoustic component includes a hot end heat exchanger and a cold end heat exchanger. The third port of the second heat exchanger is communicated with the inlet of the hot end heat exchanger. The fourth port of the second heat exchanger is communicated with the outlet of the hot end heat exchanger. Among them, a first heat exchange flow path is formed between the first port and the second port of the second heat exchanger, and a second heat exchange flow path is formed between the third port and the fourth port of the second heat exchanger; heat exchange can be carried out between the first heat exchange flow path and the second heat exchange flow path.
[0042] In the case of adopting the above technical solution, during the heating operation, the high-temperature and high-pressure refrigerant gas discharged by the compressor first enters the first heat exchanger to release heat and is transformed into a liquid state, and then passes through the throttling device and enters the second heat exchanger to absorb heat and is transformed into a gaseous state. At this time, the refrigerant can absorb heat from the outdoor environment on the one hand and the heat from the hot-end heat exchanger in the thermoacoustic component on the other hand, thereby avoiding the incomplete vaporization of the refrigerant due to the ineffective heat absorption of the refrigerant in a low-temperature environment and the too low suction pressure of the compressor, thus ensuring the compressor efficiency and the heating energy efficiency of the air-conditioning system. And CO2, as a natural refrigerant, has less impact on the environment and can still maintain good heating performance in an ultra-low temperature environment, which is beneficial to the stable operation of the air-conditioning system.
[0043] The following will refer to Figure 1 and Figure 2 to describe the CO2 air-conditioning system of the present application. Among them, Figure 1 is a schematic diagram of the operation of the heating mode of the CO2 air-conditioning system of the present application, Figure 2 is a schematic diagram of the operation of the cooling mode of the CO2 air-conditioning system of the present application.
[0044] As Figure 1 and Figure 2 shown, in a preferred embodiment, the CO2 air-conditioning system includes a first compressor 10, a four-way valve 20, a first heat exchanger 30, a throttling device 40, a drier filter 50, a second heat exchanger 60, a thermoacoustic component 70 and a pump body 80. Among them, the second heat exchanger 60 is provided with a first port 61, a second port 62, a third port 63 and a fourth port 64. A first heat exchange flow path (the left flow path in the illustrated direction) is formed between the first port 61 and the second port 62 of the second heat exchanger, and a second heat exchange flow path (the right flow path in the illustrated direction) is formed between the third port 63 and the fourth port 64 of the second heat exchanger. Heat exchange can be carried out between the first heat exchange flow path and the second heat exchange flow path. A first circulation system is formed among the first compressor 10, the four-way valve 20, the first heat exchanger 30, the throttling device 40, the drier filter 50 and the first heat exchange flow path of the second heat exchanger 60, and a second circulation system is formed among the second heat exchange flow path of the second heat exchanger 60, the thermoacoustic component 70 and the pump body 80.
[0045] The first interface 21 and the second interface 22 of the four-way valve 20 are respectively communicated with the exhaust port and the suction port of the first compressor 10. The third interface 23 of the four-way valve 20 is communicated with the first port (the lower port in the illustrated direction) of the first heat exchanger 30. The second port (the upper port in the illustrated direction) of the first heat exchanger 30 is communicated with the first port (the right port in the illustrated direction) of the throttling device 40. The second port (the left port in the illustrated direction) of the throttling device 40 is communicated with the first port (the right port in the illustrated direction) of the drying filter 50. The second port (the left port in the illustrated direction) of the drying filter 50 is communicated with the first port 61 of the second heat exchanger 60. The second port 62 of the second heat exchanger 60 is communicated with the fourth interface 24 of the four-way valve 20.
[0046] The thermoacoustic assembly 70 includes a hot-end heat exchanger 71, a cold-end heat exchanger 72 and a regenerator (not marked in the figure) located therebetween. The hot-end heat exchanger 71 and the cold-end heat exchanger 72 are arranged on both sides of the regenerator. The outlet of the pump body 80 is communicated with the inlet of the hot-end heat exchanger 71 or the inlet of the cold-end heat exchanger 72. The third port 63 of the second heat exchanger 60 is communicated with the inlet of the pump body 80. The fourth port 64 of the second heat exchanger 60 is communicated with the outlet of the hot-end heat exchanger 71 or the outlet of the cold-end heat exchanger 72. And first valve bodies 91, second valve bodies 92, third valve bodies 93 and fourth valve bodies 94 are respectively arranged at the inlets and outlets of the cold-end heat exchanger 72 and the inlets and outlets of the hot-end heat exchanger 71. Among them, the first valve bodies 91 and the third valve bodies 93 are arranged in parallel, and the second valve bodies 92 and the fourth valve bodies 94 are arranged in parallel. By controlling the first valve bodies 91, the second valve bodies 92, the third valve bodies 93 and the fourth valve bodies 94, the heat exchange fluid in the second circulation system can be selectively controlled to pass through the hot-end heat exchanger 71 or the cold-end heat exchanger 72.
[0047] It should be explained that the thermoacoustic assembly 70 can generate a cold end and a hot end through the acousto-thermal effect, that is, a cavity for storing compressible gases such as helium or argon is arranged in the thermoacoustic assembly 70, and a special acoustic structure is arranged in the thermoacoustic assembly 70. When sound waves propagate in the gas, the gas molecules will experience a periodic compression and expansion process. Through the special acoustic structure, the sound waves can generate strong compression and expansion in a specific area. In the compression stage, the collisions between gas molecules increase, and the kinetic energy of the molecules is converted into internal energy, resulting in an increase in the gas temperature. In the expansion stage, the gas does work externally, the internal energy decreases, and the temperature decreases. The effect of the sound waves can be enhanced through a resonance tube or an acoustic resonance cavity, and due to the reflection and superposition of the sound waves, relatively stable compression and expansion areas will be formed in a specific area, thereby respectively forming the hot end and the cold end of the thermoacoustic assembly 70, and the heat or cold can be transferred out by respectively arranging the hot-end heat exchanger 71 and the cold-end heat exchanger 72 at the hot end and the cold end.
[0048] Such as Figure 1As shown, in the heating mode, the first interface 21 of the four-way valve 20 communicates with the third interface 23, and the second interface 22 communicates with the fourth interface 24. The throttling device 40 is at a certain opening degree, the first valve body 91 and the second valve body 92 are in the closed state, and the third valve body 93 and the fourth valve body 94 are in the open state. In the first circulation system, the first compressor 10 first discharges high-temperature and high-pressure refrigerant gas, and then the high-temperature and high-pressure refrigerant gas enters the first heat exchanger 30 through the four-way valve 20 to release heat and is transformed into liquid refrigerant. Then the liquid refrigerant sequentially passes through the throttling device 40 and the dryer filter 50 and then enters the second heat exchanger 60 to absorb heat and vaporize, and then returns to the compressor 10 through the four-way valve 20, and the heating is realized through such reciprocating cycle. In the second circulation system, the heat exchange fluid (such as water, ethylene glycol or a mixture of the two, etc.) reciprocates between the second heat exchange flow path of the second heat exchanger 60 and the hot-end heat exchanger 71 through the pump body 80, so that the heat of the hot-end heat exchanger 71 can be transferred to the refrigerant in the first circulation system through the second heat exchange flow path and exchange heat with the refrigerant in the first heat exchanger 30.
[0049] As Figure 2 shown, in the cooling mode, the first interface 21 of the four-way valve 20 communicates with the fourth interface 24, and the second interface 22 communicates with the third interface 23. The throttling device 40 is at a certain opening degree, the first valve body 91 and the second valve body 92 are in the open state, and the third valve body 93 and the fourth valve body 94 are in the closed state. In the first circulation system, the first compressor 10 first discharges high-temperature and high-pressure refrigerant gas, and then the high-temperature and high-pressure refrigerant gas enters the second heat exchanger 60 through the four-way valve 20 to release heat, and then sequentially passes through the dryer filter 50 and the throttling device 40 for throttling and pressure reduction and then enters the first heat exchanger 30 to absorb heat and vaporize, and then returns to the compressor 10 through the four-way valve 20, and the cooling is realized through such reciprocating cycle. In the second circulation system, the heat exchange fluid reciprocates between the second heat exchange flow path of the second heat exchanger 60 and the cold-end heat exchanger 72 through the pump body 80, so that the cold of the cold-end heat exchanger 72 can be transferred to the refrigerant in the first circulation system through the second heat exchange flow path and exchange heat with the refrigerant in the first heat exchanger 30, and the flow direction of the heat exchange fluid in the cooling mode is the same as that in the heating mode.
[0050] It should be noted that, generally, when heating in an ultra-low temperature environment, the refrigerant absorbs less heat from the outside at the second heat exchanger 60, which may cause incomplete vaporization of the refrigerant, thereby affecting the pressure at the suction port of the first compressor 10, reducing the compressor efficiency, and further resulting in a decrease in the heating energy efficiency of the air conditioner. However, through the second heat exchange flow path, the refrigerant can absorb heat from both the outside and the hot end heat exchanger 71 simultaneously, improving the degree of vaporization of the refrigerant in the first heat exchange flow path, thus ensuring the working efficiency of the compressor and enhancing the heating energy efficiency of the air conditioning system in an ultra-low temperature environment. In the cooling state, on the one hand, the refrigerant can dissipate heat through the outdoor air at the second heat exchanger 60, and on the other hand, it can absorb the cold energy of the cold end heat exchanger 72 through the second heat exchange flow path, thereby improving the cooling energy efficiency of the air conditioning system. Additionally, to ensure the normal operation of the thermoacoustic component 70, during heating, the cold energy at the cold end can be removed through an additional pipeline (not shown in the figure) or other heat exchange methods, and during cooling, the heat at the hot end can also be removed through an additional pipeline (not shown in the figure) or other heat exchange methods. Moreover, the heat exchange fluid in the second circulation system can be water or other refrigerants, which can be set by those skilled in the art according to requirements as long as the heat exchange function can be achieved during the operation of the air conditioning system.
[0051] In this embodiment, the refrigerant used in the first circulation system is CO2. As a natural refrigerant, CO2 has less impact on the environment and can still maintain good heating performance in an ultra-low temperature environment, which is beneficial to the stable operation of the air conditioning system. The throttling device 40 is set as an electronic expansion valve, and the first valve body 91, the second valve body 92, the third valve body 93, and the fourth valve body 94 are all set as solenoid valves. The thermoacoustic component 70 can be driven by the first compressor 10. That is to say, the thermoacoustic component 70 can collect the sound waves generated during the operation of the first compressor 10 and then generate heat and cold through the sound waves. Preferably, the first compressor 10 can be set as a linear compressor or a scroll compressor.
[0052] Those skilled in the art can understand that the settings of the first valve body 91, the second valve body 92, the third valve body 93 and the fourth valve body 94 are not fixed. Those skilled in the art can selectively control the on-off of the hot-end heat exchanger 71 or the cold-end heat exchanger 72 according to requirements. In an alternative embodiment, the first valve body 91, the second valve body 92, the third valve body 93 and the fourth valve body 94 can be set as electrically controlled ball valves or electrically controlled butterfly valves. In another alternative embodiment, a first three-way valve and a second three-way valve can be provided in the second circulation system. The first interface, the second interface and the third interface of the first three-way valve are respectively communicated with the third port 63 of the second heat exchanger 60, the inlet of the cold-end heat exchanger 72 and the inlet of the hot-end heat exchanger 71. The first interface, the second interface and the third interface of the second three-way valve are respectively communicated with the fourth port 64 of the second heat exchanger 60, the outlet of the cold-end heat exchanger 72 and the outlet of the hot-end heat exchanger 71, so as to selectively control the on-off of the hot-end heat exchanger 71 or the cold-end heat exchanger 72 through the first three-way valve and the second three-way valve.
[0053] Those skilled in the art can also understand that although the thermoacoustic component 70 in this embodiment can be driven by the first compressor 10 to further improve the refrigeration energy efficiency or the heating energy efficiency of the air-conditioning system, its setting is not necessary. In an alternative embodiment, a separate second compressor can be provided. At this time, the thermoacoustic component 70 can also be driven by the second compressor. Preferably, the second compressor is set as a linear compressor. The reciprocating motion of the linear compressor can compress the gas, compress and expand the gas, resulting in periodic changes in the gas pressure. This change in pressure propagates in the thermoacoustic component 70 in the form of sound waves, thereby generating a hot end and a cold end.
[0054] It should be explained that although the CO2 air-conditioning system in this embodiment is introduced in combination with both a heating mode and a cooling mode, this is not intended to limit the protection scope of the present application. Without departing from the principle of the present application, those skilled in the art can apply the air-conditioning system principle of the present application only to a single heating air conditioner. At this time, the specific settings of the first circulation system or the second circulation system are not fixed either. Those skilled in the art can make changes according to requirements as long as the normal implementation of the CO2 air-conditioning system principle of the present application is not hindered. For example, in a single heating air conditioner, the four-way valve 20 is omitted and not provided, and the connection between the cold-end heat exchanger 71 and the second heat exchanger 60 is omitted. For another example, the drying filter 50 is omitted and not provided. For another example, the pump body 80 is arranged between the intersection of the outlet pipelines of the second heat exchanger 60, the hot-end heat exchanger 71 and the cold-end heat exchanger 72.
[0055] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims of this application, any one of the claimed embodiments can be used in any combination.
[0056] So far, the technical solutions of this application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of this application is obviously not limited to these specific embodiments. Without departing from the principle of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of this application.
Claims
1. A CO2 air conditioning system, characterized in that: The CO2 air conditioning system includes a first circulation system and a second circulation system. The refrigerant used in the first circulation system is CO2. The first circulation system includes: The first compressor; a first heat exchanger, wherein a first port of the first heat exchanger is in communication with an exhaust port of the first compressor; a throttling device, wherein a first port of the throttling device is in communication with a second port of the first heat exchanger; a second heat exchanger, wherein a first port of the second heat exchanger is in communication with a second port of the throttling device, and a second port of the second heat exchanger is in communication with a suction port of the first compressor; The second circulation system comprises a thermoacoustic component, the thermoacoustic component comprises a hot end heat exchanger and a cold end heat exchanger, the third port of the second heat exchanger is connected to the inlet of the hot end heat exchanger, and the fourth port of the second heat exchanger is connected to the outlet of the hot end heat exchanger; A first heat exchange path is formed between the first port and the second port of the second heat exchanger, and a second heat exchange path is formed between the third port and the fourth port of the second heat exchanger; heat exchange can be performed between the first heat exchange path and the second heat exchange path.
2. The CO2 air conditioning system according to claim 1, characterized in that: The third port of the second heat exchanger is respectively connected to the inlet of the hot end heat exchanger or the inlet of the cold end heat exchanger; The fourth port of the second heat exchanger is communicated with the outlet of the hot-end heat exchanger or the outlet of the cold-end heat exchanger respectively.
3. The CO2 air conditioning system according to claim 2, characterized in that: The second circulation system further includes a first valve body, a second valve body, a third valve body and a fourth valve body; The first valve body and the third valve body are arranged in parallel, the first valve body is located between the third port of the second heat exchanger and the inlet of the cold end heat exchanger, and the third valve body is located between the third port of the second heat exchanger and the inlet of the hot end heat exchanger; The second valve body and the fourth valve body are arranged in parallel, the second valve body is located between the fourth port of the second heat exchanger and the outlet of the cold end heat exchanger, and the fourth valve body is located between the fourth port of the second heat exchanger and the outlet of the hot end heat exchanger.
4. The CO2 air conditioning system according to claim 2, characterized in that: The second circulation system further comprises a first three-way valve and a second three-way valve, wherein the first interface, the second interface and the third interface of the first three-way valve are respectively connected to the third port of the second heat exchanger, the inlet of the cold end heat exchanger and the inlet of the hot end heat exchanger; The first interface, the second interface and the third interface of the second three-way valve are respectively connected to the fourth port of the second heat exchanger, the outlet of the cold end heat exchanger and the outlet of the hot end heat exchanger.
5. The CO2 air conditioning system according to claim 1, characterized in that: The thermoacoustic assembly is capable of being driven by the first compressor; and / or The first compressor is configured as a linear compressor or a scroll compressor.
6. The CO2 air conditioning system according to claim 1, characterized in that: The thermoacoustic assembly further comprises a second compressor, by which the thermoacoustic assembly can be driven.
7. The CO2 air conditioning system according to claim 6, characterized in that: The second compressor is configured as a linear compressor.
8. The CO2 air conditioning system according to claim 1, characterized in that: The first circulation system also includes a four-way valve, a first interface, a second interface, a third interface and a fourth interface of the four-way valve are respectively connected to the exhaust port of the first compressor, the intake port of the first compressor, the first port of the first heat exchanger and the second port of the second heat exchanger.
9. The CO2 air conditioning system according to claim 3, characterized in that: The first valve body and / or the second valve body and / or the third valve body and / or the fourth valve body are configured as solenoid valves.
10. The CO2 air conditioning system according to claim 1, characterized in that: The first circulation system further comprises a drying filter, wherein a first port and a second port of the drying filter are respectively connected to the second port of the throttling device and the first port of the second heat exchanger; and / or The throttling device is configured as an electronic expansion valve; and / or The second circulation system further includes a pump body, which is arranged between the third port of the second heat exchanger and the inlet of the hot end heat exchanger, or between the outlet of the hot end heat exchanger and the fourth port of the second heat exchanger.