Air conditioning system
By using CO2 as the refrigerant and thermoacoustic components in the air conditioning system, combined with the first and second circulation loops, the problem of low heating efficiency in ultra-low temperature environments is solved, achieving high-efficiency heating and low environmental impact.
Patent Information
- Application Number
- CN202422952513.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-29
AI Technical Summary
In ultra-low temperature environments, traditional air conditioning systems have low heating efficiency and reduced heat exchange efficiency, leading to increased energy consumption.
Using CO2 as the refrigerant, and combining the first and second circulation loops, the heat exchangers at the hot and cold ends of the thermoacoustic component transfer heat and cold energy respectively. The first compressor drives the thermoacoustic component to generate cold and heat energy, and the energy transfer is achieved through multiple heat exchange flow paths.
It improves the heating efficiency of the air conditioning system in ultra-low temperature environments, reduces heat loss, ensures heating effect, and reduces environmental impact through the use of CO2.
Smart Images
Figure CN223537835U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of air conditioning technology, and specifically to an air conditioning system. Background Technology
[0002] Air conditioning plays an important role in improving the living environment. However, in extremely cold regions or in ultra-low temperature environments caused by extreme weather, the physical properties of the refrigerant used in traditional air conditioning heating may change. For example, the viscosity may increase, the fluidity may decrease, the evaporation temperature may decrease, or even the phase change may be incomplete or condensation may occur, which may affect the circulation and heat exchange efficiency of the refrigerant in the system.
[0003] In addition, in ultra-low temperature environments, the temperature difference between the heat exchanger and the outside is small. Therefore, the heat exchanger is unable to effectively absorb heat from the low temperature environment or release heat into the room. Most of the heat will be lost to the outside during the flow of the refrigerant, which will further lead to a significant decrease in the heat exchange efficiency of the heat exchanger. In order to ensure sufficient heating effect, a large amount of energy will be consumed.
[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Utility Model Content
[0005] In order to solve at least one of the above-mentioned problems in the prior art, namely, to solve the problem of low heating efficiency of existing air conditioning systems in ultra-low temperature environments, this application provides an air conditioning system, the air conditioning system including a first compressor, a first heat exchanger, a second heat exchanger, a throttling device and a thermoacoustic component, the thermoacoustic component including a hot end heat exchanger and a cold end heat exchanger, the cold end heat exchanger being provided with a first heat exchange flow path, and the hot end heat exchanger being provided with a second heat exchange flow path;
[0006] The first compressor, the first heat exchanger, and the throttling device together with the first heat exchange flow path form a first circulation loop, and the refrigerant used in the first circulation loop is CO2.
[0007] The second heat exchanger and the second heat exchange flow path form a second circulation loop.
[0008] With the above technical solution, when the air conditioning system is in heating mode, the heat of the thermoacoustic component can be directly transferred to the second heat exchanger through the second circulation loop, avoiding heat loss caused by the heat transfer process at the heating end. The cooling capacity of the thermoacoustic component can be transferred to the outside through the first heat exchanger through the first circulation loop, thereby ensuring the heating effect of the thermoacoustic component and improving the heating efficiency of the system.
[0009] In the preferred embodiment of the above air conditioning system, the exhaust port of the first compressor is connected to the first port of the first heat exchange flow path;
[0010] The first port of the throttling device is connected to the second port of the first heat exchange flow path, and the second port of the throttling device is connected to the first port of the first heat exchanger.
[0011] The second port of the first heat exchanger is connected to the suction port of the first compressor.
[0012] In the preferred embodiment of the above air conditioning system, the cold end heat exchanger is further provided with a third heat exchange flow path, and the hot end heat exchanger is further provided with a fourth heat exchange flow path.
[0013] The first compressor, the first heat exchanger, and the throttling device form the first circulation loop with the first heat exchange flow path or the fourth heat exchange flow path;
[0014] The second heat exchanger and the second heat exchange flow path or the third heat exchange flow path form the second circulation loop.
[0015] When the above technical solution is adopted, during the cooling operation of the air conditioning system, the cooling capacity of the thermoacoustic component can be directly transferred to the second heat exchanger through the second circulation loop, and the heat of the thermoacoustic component can be transferred to the outside through the first heat exchanger through the first circulation loop, thereby ensuring the cooling effect of the thermoacoustic component and improving the cooling energy efficiency of the system.
[0016] In the preferred embodiment of the above air conditioning system, the first heat exchange path, the second heat exchange path, the third heat exchange path and the fourth heat exchange path are connected in parallel in pairs.
[0017] In the preferred embodiment of the above-mentioned air conditioning system, the air conditioning system further includes a plurality of control valves, which are used to control the on / off state of the first heat exchange flow path, the second heat exchange flow path, the third heat exchange flow path and the fourth heat exchange flow path.
[0018] In the preferred embodiment of the above-described air conditioning system, the thermoacoustic component can be driven by the first compressor; and / or
[0019] The first compressor is configured as a linear compressor or a scroll compressor.
[0020] With the above technical solution, the thermoacoustic component can collect the sound waves generated by the first compressor during operation without the need for additional energy supply. The thermoacoustic component generates cooling and heating based on the acoustic heating effect and transfers energy through various heat exchange channels, thereby further improving the cooling or heating efficiency of the air conditioning system.
[0021] In the preferred embodiment of the above-mentioned air conditioning system, the thermoacoustic component further includes a second compressor, and the thermoacoustic component is driven by the second compressor.
[0022] In the preferred embodiment of the above-mentioned air conditioning system, the second compressor is configured as a linear compressor.
[0023] In the preferred embodiment of the above-mentioned air conditioning system, the air conditioning system further includes a four-way valve, wherein the first port of the four-way valve is connected to the exhaust port of the first compressor, and the second port of the four-way valve is connected to the intake port of the first compressor.
[0024] The third port of the four-way valve is connected to the first port of the first heat exchange flow path or the first port of the fourth heat exchange flow path, and the fourth port of the four-way valve is connected to the second port of the first heat exchanger.
[0025] In the preferred embodiment of the above-mentioned air conditioning system, the air conditioning system further includes a dryer filter, which is disposed in the first circulation loop; and / or
[0026] The air conditioning system further includes a liquid receiver disposed in the first circulation loop; and / or
[0027] The throttling device is configured as an electronic expansion valve; and / or
[0028] The refrigerant used in the first circulation loop is CO2. Attached Figure Description
[0029] The air conditioning system of this application will now be described with reference to the accompanying drawings. In the drawings:
[0030] Figure 1 This is a schematic diagram of the operation of the air conditioning system in heating mode according to this application;
[0031] Figure 2 This is a schematic diagram of the operation of the air conditioning system in cooling mode according to this application.
[0032] List of reference numerals
[0033] 10. First compressor; 20. Four-way valve; 21. First port; 22. Second port; 23. Third port; 24. Fourth port; 30. First heat exchanger; 40. Dryer filter; 50. Throttling device; 60. Second heat exchanger; 70. Thermoacoustic assembly; 71. Hot end heat exchanger; 72. Cold end heat exchanger; 80. Liquid receiver; 91. First heat exchange flow path; 92. Second heat exchange flow path; 93. Third heat exchange flow path; 94. Fourth heat exchange flow path. Detailed Implementation
[0034] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. For example, although the air conditioning system in this embodiment is described in conjunction with both heating and cooling modes, this is not intended to limit the scope of protection of this application. Without departing from the principles of this application, those skilled in the art can apply the principles of the air conditioning system of this application to a single heating air conditioner.
[0035] It should be noted that in the description of this application, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These terms are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0036] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0037] As described in the background art, air conditioning plays an important role in improving the living environment. However, in extremely cold regions or in ultra-low temperature environments caused by extreme weather, the physical properties of the refrigerant used in traditional air conditioning heating may change. For example, the viscosity may increase, the fluidity may decrease, the evaporation temperature may decrease, or even the phase change may be incomplete or condensation may occur, which may affect the circulation and heat exchange efficiency of the refrigerant in the system.
[0038] In addition, in ultra-low temperature environments, the temperature difference between the heat exchanger and the outside is small. Therefore, the heat exchanger is unable to effectively absorb heat from the low temperature environment or release heat into the room. Most of the heat will be lost to the outside during the flow of the refrigerant, which will further lead to a significant decrease in the heat exchange efficiency of the heat exchanger. In order to ensure sufficient heating effect, a large amount of energy will be consumed.
[0039] To address the problem of low heating efficiency in existing air conditioning systems under ultra-low temperature conditions, this application provides an air conditioning system comprising a first compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a thermoacoustic assembly. The thermoacoustic assembly includes a hot-end heat exchanger and a cold-end heat exchanger. The cold-end heat exchanger has a first heat exchange flow path, and the hot-end heat exchanger has a second heat exchange flow path. The first compressor, the first heat exchanger, and the throttling device form a first circulation loop with the first heat exchange flow path. The refrigerant used in the first circulation loop is CO2. The second heat exchanger and the second heat exchange flow path form a second circulation loop.
[0040] With the above technical solution, during the heating operation of the air conditioning system, the heat from the thermoacoustic components can be directly transferred to the second heat exchanger through the second circulation loop, avoiding heat loss caused by the heat transfer process at the heating end. The cooling capacity of the thermoacoustic components can be transferred to the outside through the first heat exchanger via the first circulation loop, thereby ensuring the heating effect of the thermoacoustic components and improving the system's heating efficiency. Furthermore, CO2, as a natural refrigerant, has a relatively small impact on the environment and can maintain good heating performance even in ultra-low temperature environments, which is beneficial to the stable operation of the air conditioning system.
[0041] The following reference Figure 1 and Figure 2 The air conditioning system described in this application is explained. Among other things, Figure 1 This is a schematic diagram of the operation of the air conditioning system in heating mode according to this application. Figure 2 This is a schematic diagram of the operation of the air conditioning system in cooling mode according to this application.
[0042] like Figure 1 and Figure 2 As shown, in a preferred embodiment, the air conditioning system includes a first compressor 10, a four-way valve 20, a first heat exchanger 30, a dryer filter 40, a throttling device 50, a second heat exchanger 60, a thermoacoustic assembly 70, and a liquid receiver 80. The thermoacoustic assembly 70 includes a cold-end heat exchanger 71 and a hot-end heat exchanger 72. The cold-end heat exchanger 71 is provided with a first heat exchange flow path 91 and a third heat exchange flow path 93, and the hot-end heat exchanger is provided with a second heat exchange flow path 92 and a fourth heat exchange flow path 94. The first heat exchange flow path 91, the second heat exchange flow path 92, the third heat exchange flow path 93, and the fourth heat exchange flow path 94 are connected in parallel in pairs. The on / off state of each heat exchange flow path can be controlled by multiple control valves. The first compressor 10, four-way valve 20, first heat exchanger 30, dryer filter 40, throttling device 50, liquid receiver 80, and the first heat exchange flow path 91 or the fourth heat exchange flow path 94 form a first circulation loop (the right loop in the direction shown in the figure), and the second heat exchanger 60 and the second heat exchange flow path 92 or the third heat exchange flow path 93 form a second circulation loop (the left loop in the direction shown in the figure).
[0043] The first port 21 of the four-way valve 20 is connected to the exhaust port of the first compressor 10, the second port 22 of the four-way valve is connected to the suction port of the first compressor 10, the third port 23 of the four-way valve 20 is connected to the first port (lower port in the diagram direction) of the liquid receiver 80, the second port (upper port in the diagram direction) of the liquid receiver 80 is connected to the first port of the first heat exchange flow path 91 and the first port of the fourth heat exchange flow path 94, the second port of the first heat exchange flow path 91 and the second port of the fourth heat exchange flow path 94 are connected to the first port (left port in the diagram direction) of the dryer filter 40, the second port (right port in the diagram direction) of the dryer filter 40 is connected to the first port (left port in the diagram direction) of the throttling device 50, the second port (right port in the diagram direction) of the throttling device 50 is connected to the first port (upper port in the diagram direction) of the first heat exchanger 30, and the second port (lower port in the diagram direction) of the first heat exchanger 30 is connected to the fourth port 24 of the four-way valve 20.
[0044] It should be explained that the thermoacoustic component 70 can generate cold and hot ends through the acoustic heating effect. Specifically, the thermoacoustic component 70 contains a cavity for storing compressible gases such as helium or argon, and it also incorporates a special acoustic structure. When sound waves propagate through the gas, the gas molecules undergo periodic compression and expansion. This special acoustic structure allows the sound waves to generate strong compression and expansion in specific regions. During compression, collisions between gas molecules increase, converting kinetic energy into internal energy, leading to an increase in gas temperature. During expansion, the gas does work, reducing its internal energy and lowering its temperature. The effect of the sound waves can be enhanced by a resonant tube or acoustic resonant cavity. Furthermore, due to the reflection and superposition of sound waves, relatively stable compression and expansion regions are formed in specific areas, thus creating the hot and cold ends of the thermoacoustic component 70. Cold-end heat exchangers 71 and hot-end heat exchangers 72 are then installed at the cold and hot ends respectively to transfer heat or cold energy away.
[0045] The following explanation uses the example of the first heat exchanger 30 being an outdoor heat exchanger and the second heat exchanger 60 being an indoor heat exchanger.
[0046] like Figure 1As shown, in heating mode, the first port 21 of the four-way valve 20 is connected to the third port 23, the second port 22 is connected to the fourth port 24, the throttling device 50 is at a certain opening, the first heat exchange flow path 91 and the second heat exchange flow path 92 are in a closed state, and the third heat exchange flow path 93 and the fourth heat exchange flow path 94 are in a closed state. The thermoacoustic component 70 is turned on. At this time, the cold energy is concentrated at the cold end heat exchanger 71, and the heat is concentrated at the hot end heat exchanger 72. In the second circulation loop, the heat exchange working fluid circulates back and forth between the second heat exchanger 60 and the second heat exchange flow path 92, thereby transferring the heat generated by the thermoacoustic component 70 to the second heat exchanger 60, and exchanging heat with the indoor air through the second heat exchanger 60. In the first circulation loop, the first compressor 10 discharges high-temperature and high-pressure refrigerant gas. Then, the high-temperature and high-pressure refrigerant gas passes through the four-way valve 20 and the liquid receiver 80, and then passes through the first heat exchange flow path 91 to carry away the cooling capacity generated by the thermoacoustic component 70. The refrigerant then passes through the dryer filter 40 and the throttling device 50 in sequence to reduce its pressure and enter the first heat exchanger 30 to absorb heat from the environment. Then, it returns to the first compressor 10 through the four-way valve 20. This cycle repeats to carry away the cooling capacity generated by the thermoacoustic component 70, ensuring the normal operation of the thermoacoustic component 70.
[0047] like Figure 2 As shown, in cooling mode, the first port 21 of the four-way valve 20 is connected to the fourth port 24, the second port 22 is connected to the third port 23, the throttling device 50 is at a certain opening, the first heat exchange flow path 91 and the second heat exchange flow path 92 are in an open state, and the third heat exchange flow path 93 and the fourth heat exchange flow path 94 are in a closed state. In the second circulation loop, the heat exchange working fluid circulates back and forth between the second heat exchanger 60 and the third heat exchange flow path 93, thereby transferring the cooling energy generated by the thermoacoustic component 70 to the second heat exchanger 60. In the first circulation loop, the first compressor 10 discharges high-temperature and high-pressure refrigerant gas, which then enters the first heat exchanger 30 through the four-way valve 20 to release heat. It then passes through the throttling device 50 to reduce pressure, the dryer filter 40, and the fourth heat exchange path 94 to absorb the heat generated by the thermoacoustic component 70. Finally, it returns to the first compressor 10 through the liquid receiver 80 and the four-way valve 20, thus repeating the cycle to remove the heat generated by the thermoacoustic component 70 and ensure the normal operation of the thermoacoustic component 70.
[0048] It should be explained that, generally, when cooling in ultra-high temperature environments or heating in ultra-low temperature environments, the heat exchange efficiency of the heat exchanger will be significantly reduced due to changes in the physical state of the refrigerant and small temperature differences, thereby reducing the energy efficiency of the air conditioning system. However, in this embodiment, in both heating and cooling modes, heat or cold is directly transferred to the second heat exchanger through the thermoacoustic component 70, reducing energy loss during heat or cold transfer at the heating end. Therefore, the indoor heating or cooling effect can be guaranteed, improving the heating or cooling energy efficiency of the air conditioning system.
[0049] In this embodiment, the refrigerant used in the first circulation loop is CO2. As a natural refrigerant, CO2 has minimal environmental impact and maintains good heating performance even in ultra-low temperature environments, which is beneficial for the stable operation of the air conditioning system. The throttling device 50 is configured as an electronic expansion valve, and solenoid valves are installed at both ports of the first heat exchange path 91, the second heat exchange path 92, the third heat exchange path 93, and the fourth heat exchange path 94. The thermoacoustic component 70 can be driven by the first compressor 10. That is, the thermoacoustic component 70 can collect the sound waves generated during the operation of the first compressor 10 and then generate heat and cooling through the sound waves. Preferably, the first compressor 10 can be configured as a linear compressor or a scroll compressor. With the above technical solution, the thermoacoustic component 70 can convert the acoustic work collected from the first compressor 10 into heat energy through its structure. That is, the operation of the thermoacoustic component 70 does not require additional energy input, which is beneficial for further improving the energy efficiency of the air conditioning system. Furthermore, driving the thermoacoustic component 70 with a linear compressor helps reduce energy loss, thereby improving the overall system efficiency. The linear compressor also generates less noise and has a faster response time, facilitating rapid and precise adjustment of the thermoacoustic component 70. Conversely, using a scroll compressor to drive the thermoacoustic component 70, while ensuring a certain level of cooling and heating performance, further facilitates the compression of the refrigerant and the cooling and heating cycle.
[0050] Those skilled in the art will understand that although the thermoacoustic component 70 in this embodiment can be driven by the first compressor 10 to further improve the cooling or heating efficiency of the air conditioning system, its configuration is not mandatory. In an alternative embodiment, a separate second compressor can be provided, in which case the thermoacoustic component 70 can also be driven by the second compressor. Preferably, the second compressor is a linear compressor. The reciprocating motion of the linear compressor can compress the gas, compressing and expanding the gas, resulting in periodic changes in gas pressure. These pressure changes propagate in the thermoacoustic component 70 in the form of sound waves, thereby generating hot and cold ends. In addition, the setting of controlling the on / off of the first heat exchange flow path 91, the second heat exchange flow path 92, the third heat exchange flow path 93, and the fourth heat exchange flow path 94 by multiple solenoid valves is not fixed. In an alternative embodiment, the on / off of each heat exchange flow path can be controlled by multiple electrically controlled ball valves, electrically controlled butterfly valves, or three-way valves. In addition, those skilled in the art can change the refrigerant in the first circulation loop, such as Freon, HFC refrigerant, HC hydrocarbon refrigerant, etc., as long as the normal function of the air conditioning system of this application can be guaranteed.
[0051] It should be explained that although the air conditioning system in this embodiment is described in conjunction with both heating and cooling modes, this is not intended to limit the scope of protection of this application. Without departing from the principles of this application, those skilled in the art can apply the principles of the air conditioning system to either a single cooling or single heating air conditioner. In this case, the specific configuration of the air conditioning system is not fixed and can be modified according to needs, as long as it does not hinder the normal implementation of the principles of the air conditioning system. For example, in a single cooling air conditioner, the four-way valve 20 is omitted, and the third heat exchange path 93 and the fourth heat exchange path 94 are omitted. Similarly, the dryer filter 40 or the liquid receiver 80 is omitted.
[0052] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.
[0053] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles 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 all fall within the scope of protection of this application.
Claims
1. An air conditioning system, characterized in that, The air conditioning system includes a first compressor, a first heat exchanger, a second heat exchanger, a throttling device, and a thermoacoustic component. The thermoacoustic component includes a hot-end heat exchanger and a cold-end heat exchanger. The cold-end heat exchanger is provided with a first heat exchange flow path, and the hot-end heat exchanger is provided with a second heat exchange flow path. The first compressor, the first heat exchanger, and the throttling device form a first circulation loop with the first heat exchange flow path; The second heat exchanger and the second heat exchange flow path form a second circulation loop.
2. The air conditioning system according to claim 1, characterized in that, The exhaust port of the first compressor is connected to the first port of the first heat exchange flow path; The first port of the throttling device is connected to the second port of the first heat exchange flow path, and the second port of the throttling device is connected to the first port of the first heat exchanger. The second port of the first heat exchanger is connected to the suction port of the first compressor.
3. The air conditioning system according to claim 2, characterized in that, The cold end heat exchanger is also provided with a third heat exchange flow path, and the hot end heat exchanger is also provided with a fourth heat exchange flow path. The first compressor, the first heat exchanger, and the throttling device form the first circulation loop with the first heat exchange flow path or the fourth heat exchange flow path; The second heat exchanger and the second heat exchange flow path or the third heat exchange flow path form the second circulation loop.
4. The air conditioning system according to claim 3, characterized in that, The first heat exchange flow path, the second heat exchange flow path, the third heat exchange flow path, and the fourth heat exchange flow path are arranged in parallel in pairs.
5. The air conditioning system according to claim 3, characterized in that, The air conditioning system also includes multiple control valves, which are used to control the on / off state of the first heat exchange path, the second heat exchange path, the third heat exchange path, and the fourth heat exchange path.
6. The air conditioning system according to claim 1, characterized in that, The thermoacoustic component can be driven by the first compressor; and / or The first compressor is configured as a linear compressor or a scroll compressor.
7. The air conditioning system according to claim 1, characterized in that, The thermoacoustic assembly also includes a second compressor, which drives the thermoacoustic assembly.
8. The air conditioning system according to claim 7, characterized in that, The second compressor is configured as a linear compressor.
9. The air conditioning system according to claim 3, characterized in that, The air conditioning system also includes a four-way valve, the first port of which is connected to the exhaust port of the first compressor, and the second port of which is connected to the intake port of the first compressor. The third port of the four-way valve is connected to the first port of the first heat exchange flow path or the first port of the fourth heat exchange flow path, and the fourth port of the four-way valve is connected to the second port of the first heat exchanger.
10. The air conditioning system according to claim 1, characterized in that, The air conditioning system further includes a dryer filter, which is disposed in the first circulation loop; and / or The air conditioning system further includes a liquid receiver disposed in the first circulation loop; and / or The throttling device is configured as an electronic expansion valve; and / or the refrigerant used in the first circulation loop is CO2.