An air conditioner

Abstract

The embodiment of the application provides an air conditioner, and relates to the technical field of the air conditioner, which comprises an indoor heat exchanger, an outdoor heat exchanger, a control valve, a compressor, a gas-liquid separator and a guide flow path; the control valve, the indoor heat exchanger and the outdoor heat exchanger are communicated with each other to form a main refrigerant flow path; the refrigerant inlet and the refrigerant outlet of the compressor are communicated with the control valve, so that the refrigerant flowing out of the refrigerant outlet of the compressor is guided to the main refrigerant flow path by the control valve to perform heat exchange, and then is guided to the refrigerant inlet of the compressor by the control valve; the inlet of the gas-liquid separator is connected with the control valve, and the gas outlet of the gas-liquid separator is connected with the refrigerant inlet of the compressor, so as to guide the refrigerant gas after heat exchange to the refrigerant inlet of the compressor; and the guide flow path is connected with the liquid outlet of the gas-liquid separator and the main refrigerant flow path respectively, so as to guide the liquid refrigerant flowing out of the liquid outlet of the gas-liquid separator to the main refrigerant flow path to perform evaporation again.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, specifically to an air conditioner. Background Technology

[0002] In existing air conditioning systems, superheat control is primarily achieved by adjusting the opening of the expansion valve, which requires complex calculations to determine. However, during actual operation, the refrigerant returning to the compressor often presents two undesirable conditions: either the refrigerant is not completely evaporated and remains liquid, or the refrigerant completely evaporates and causes excessive superheating. Both of these conditions negatively impact the performance of the air conditioning system.

[0003] Specifically, if the refrigerant fails to evaporate sufficiently at the compressor inlet or experiences excessive overheating, the air conditioning system's energy efficiency will be significantly reduced, resulting in energy waste. More seriously, when the refrigerant enters the compressor carrying liquid, it may cause liquid slugging and lead to lubricant failure. This poses a serious threat to the compressor's reliability and may even cause equipment damage and a shortened lifespan.

[0004] The current conventional approach is to separate the refrigerant into gas and liquid components. The gaseous refrigerant flows into the compressor for further compression, while the liquid refrigerant flows to the storage tank for storage. This approach requires the installation of an additional storage tank, which increases costs. Utility Model Content

[0005] This application provides an air conditioner designed to prevent compressor liquid slugging while reducing the cost of the air conditioner.

[0006] On one hand, embodiments of this application provide an air conditioner, including:

[0007] Indoor heat exchanger;

[0008] Outdoor heat exchanger;

[0009] A control valve, the indoor heat exchanger, and the outdoor heat exchanger are interconnected to form a refrigerant main flow path;

[0010] The compressor has both its refrigerant inlet and refrigerant outlet connected to the control valve, so that the refrigerant flowing out of the compressor's refrigerant outlet is guided by the control valve to the main refrigerant flow path for heat exchange, and then guided by the control valve to the compressor's refrigerant inlet.

[0011] A gas-liquid separator, wherein the inlet of the gas-liquid separator is connected to the control valve, and the gas outlet of the gas-liquid separator is connected to the refrigerant inlet of the compressor, so as to guide the heat-exchanged refrigerant gas to the refrigerant inlet of the compressor; and,

[0012] The guide flow path is connected to the liquid outlet of the gas-liquid separator and the refrigerant main flow path, respectively, so as to guide the liquid refrigerant flowing out of the liquid outlet of the gas-liquid separator to the refrigerant main flow path for re-evaporation.

[0013] In some embodiments, the guiding flow path includes:

[0014] A main guide path, one end of which is connected to the liquid outlet of the gas-liquid separator; and...

[0015] The first branch flow path has one end connected to the other end of the main guide flow path, and the other end connected to the main refrigerant flow path, and is located between the indoor heat exchanger and the outdoor heat exchanger.

[0016] In some embodiments, the refrigerant main flow path is further provided with an expansion valve, which is located between the outdoor heat exchanger and the indoor heat exchanger;

[0017] The other end of the first branch flow path is located between the outdoor heat exchanger and the expansion valve;

[0018] The guiding flow path also includes:

[0019] The second branch flow path has one end connected to the other end of the main guide flow path and the other end connected to the main refrigerant flow path, and is located between the indoor heat exchanger and the expansion valve; and,

[0020] The selection switching device is used to selectively switch the refrigerant flowing out of the main flow path to one of the first branch flow path and the second branch flow path.

[0021] In some embodiments, the guiding flow path further includes:

[0022] The third branch flow path is connected at one end to the other end of the main guide flow path and at the other end to the main refrigerant flow path, and is located between the outdoor heat exchanger and the control valve;

[0023] The selection and switching device is also used to select and switch the refrigerant flowing out of the main flow path to one of the first branch flow path, the second branch flow path, and the third branch flow path.

[0024] In some embodiments, the air conditioner includes a cooling mode and a heating mode;

[0025] When the air conditioner is in cooling mode, the selection switching device is used to select and switch the refrigerant flowing out of the main flow path to one of the second branch flow path and the third branch flow path;

[0026] When the air conditioner is in heating mode, the selection switching device is used to selectively switch the refrigerant flowing out of the main flow path to the first branch flow path.

[0027] In some embodiments, a first booster pump is provided on the third branch flow path.

[0028] In some embodiments, the guiding flow path includes a plurality of branch flow paths connected to the other end of the main guiding flow path;

[0029] The selection and switching device has multiple switching valves, which are distributed in multiple branch flow paths to control the on / off state of the multiple branch flow paths.

[0030] In some embodiments, a one-way valve is provided on the guide flow path, and the one-way valve guides the refrigerant main flow path unidirectionally along the liquid outlet of the gas-liquid separator.

[0031] In some embodiments, a second booster pump is provided on the main guide channel.

[0032] In some embodiments, multiple indoor heat exchangers are provided, and the multiple indoor heat exchangers are arranged in parallel.

[0033] In the embodiments of this application, by setting up the gas-liquid separator, the refrigerant after heat exchange in the refrigerant main flow path can be separated into gas and liquid before flowing to the refrigerant inlet of the compressor. That is, only the gaseous refrigerant flows to the refrigerant inlet of the compressor, thereby effectively preventing the occurrence of liquid slugging. The liquid refrigerant generated by the gas-liquid separator is directly guided to the refrigerant main flow path for re-evaporation, without the need to set up a separate liquid storage tank for the liquid refrigerant, which effectively saves costs. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a flow path diagram of the heating mode of the first embodiment of the air conditioner of this application;

[0036] Figure 2 This is a flow path diagram in cooling mode of the first embodiment of the air conditioner of this application;

[0037] Figure 3 This is a flow path diagram of the cooling mode of the second embodiment of the air conditioner of this application.

[0038] Explanation of key component symbols:

[0039] 100 air conditioner 10 Indoor heat exchanger 20 Outdoor heat exchanger 30 control valve 40 compressor 50 Mainstream route of refrigerant 60 Guided flow path 70 gas-liquid separator 61 Guiding the mainstream path 62 First branch path 63 Second branch flow path 64 Third branch flow path 65 Expansion valve 66 First booster pump 67 Second booster pump 68 Switch valve 69 one-way valve Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0043] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0044] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0045] In existing air conditioning systems, superheat control is primarily achieved by adjusting the opening of the expansion valve, which requires complex calculations to determine. However, during actual operation, the refrigerant returning to the compressor often presents two undesirable conditions: either the refrigerant is not completely evaporated and remains liquid, or the refrigerant completely evaporates and causes excessive superheating. Both of these conditions negatively impact the performance of the air conditioning system.

[0046] Specifically, if the refrigerant fails to evaporate sufficiently at the compressor inlet or experiences excessive overheating, the air conditioning system's energy efficiency will be significantly reduced, resulting in energy waste. More seriously, when the refrigerant enters the compressor carrying liquid, it may cause liquid slugging and lead to lubricant failure. This poses a serious threat to the compressor's reliability and may even cause equipment damage and a shortened lifespan.

[0047] The current conventional approach is to separate the refrigerant into gas and liquid components. The gaseous refrigerant flows into the compressor for further compression, while the liquid refrigerant flows to the storage tank for storage. This approach requires the installation of an additional storage tank, which increases costs.

[0048] Please see Figures 1 to 3This application provides an air conditioner 100 designed to prevent liquid buildup in the compressor 40 while reducing the cost of the air conditioner 100. Specifically, the air conditioner 100 includes an indoor heat exchanger 10, an outdoor heat exchanger 20, a control valve 30, a compressor 40, a gas-liquid separator 70, and a guide flow path 60. The control valve 30, the indoor heat exchanger 10, and the outdoor heat exchanger 20 are interconnected to form a refrigerant main flow path 50. The refrigerant inlet and outlet of the compressor 40 are both connected to the control valve 30, allowing the refrigerant flowing out of the compressor 40's refrigerant outlet to pass through the control valve 30. After heat exchange in the refrigerant main flow path 50, the refrigerant gas is then guided by the control valve 30 to the refrigerant inlet of the compressor 40. The inlet of the gas-liquid separator 70 is connected to the control valve 30, and the gas outlet of the gas-liquid separator 70 is connected to the refrigerant inlet of the compressor 40, so as to guide the heat-exchanged refrigerant gas to the refrigerant inlet of the compressor 40. The guide flow path 60 is connected to the liquid outlet of the gas-liquid separator 70 and the refrigerant main flow path 50 respectively, so as to guide the liquid refrigerant flowing out of the liquid outlet of the gas-liquid separator 70 to the refrigerant main flow path 50 for re-evaporation.

[0049] It should be noted that the specific implementation of the control valve 30 is not limited. It can be a six-way valve, a four-way valve, or a combination of multiple three-way valves, etc., and is not limited here. The inlet of the gas-liquid separator 70 is connected to the control valve 30, so that the refrigerant flowing out after heat exchange through the refrigerant main flow path 50 first flows to the gas-liquid separator 70 for gas-liquid separation, and then the gaseous refrigerant flows to the refrigerant inlet of the compressor 40, which can effectively prevent liquid slugging.

[0050] The specific implementation of the guide flow path 60 is not limited. It can be a single flow path that directly guides the refrigerant between the indoor heat exchanger 10 and the outdoor heat exchanger 20. In cooling mode, the refrigerant will move along with the refrigerant in the main refrigerant flow path 50 to the indoor heat exchanger 10 for re-evaporation, and then flow to the gas-liquid separator 70 via the control valve 30. In heating mode, the refrigerant will move along with the refrigerant in the main refrigerant flow path 50 to the outdoor heat exchanger 20 for re-evaporation, and then flow to the gas-liquid separator 70 via the control valve 30.

[0051] Alternatively, multiple branches can be set up to guide the liquid refrigerant in the gas-liquid separator 70 to different positions in the refrigerant main flow path 50 under different modes, etc., which is not limited here.

[0052] In the embodiments of this application, by setting the gas-liquid separator 70, the refrigerant after heat exchange in the refrigerant main flow path 50 can be separated into gas and liquid before flowing to the refrigerant inlet of the compressor 40. That is, only the gaseous refrigerant flows to the refrigerant inlet of the compressor 40, thereby effectively preventing the occurrence of liquid slugging. The liquid refrigerant generated by the gas-liquid separator 70 is directly guided to the refrigerant main flow path 50 for re-evaporation, without the need to set up a separate liquid storage tank for the liquid refrigerant, which effectively saves costs.

[0053] In some embodiments, the guide flow path 60 includes a main guide flow path 61 and a first branch flow path 62. One end of the main guide flow path 61 is connected to the liquid outlet of the gas-liquid separator 70. One end of the first branch flow path 62 is connected to the other end of the main guide flow path 61, and the other end of the first branch flow path 62 is connected to the refrigerant main flow path 50 and is located between the indoor heat exchanger 10 and the outdoor heat exchanger 20.

[0054] It should be noted that the guide flow path 60 may include only the first branch flow path 62, or it may include other branch flow paths, etc., which is not limited here. The other end of the first branch flow path 62 is connected to the refrigerant main flow path 50 and is located between the indoor heat exchanger 10 and the outdoor heat exchanger 20. Specifically, in some embodiments, an expansion valve 65 is provided on the refrigerant main flow path 50 between the indoor heat exchanger 10 and the outdoor heat exchanger 20. Correspondingly, in this case, the other end of the first branch flow path 62 may be located between the indoor heat exchanger 10 and the expansion valve 65, or it may be located between the expansion valve 65 and the outdoor heat exchanger 20, which is not limited here.

[0055] Taking the other end of the first branch flow path 62 as an example, which is located between the indoor heat exchanger 10 and the expansion valve 65, in the cooling mode, the liquid refrigerant flowing out of the first branch flow path 62 can merge with the refrigerant expanded by the expansion valve 65 and flow together to the indoor heat exchanger 10 for evaporative heat exchange. In the heating mode, the liquid refrigerant flowing out of the first branch flow path 62 can flow together with the refrigerant flowing out of the indoor heat exchanger 10 to the expansion valve 65. After throttling and expansion, it then flows to the outdoor heat exchanger 20 for evaporative heat exchange. With this setting, regardless of whether it is in the cooling mode or the heating mode, the outflowing refrigerant will only flow into the indoor heat exchanger 10 or the outdoor heat exchanger 20, and one of them will perform evaporative heat exchange, without condensing heat exchange, which has little impact on the temperature regulation effect of the air conditioner 100.

[0056] Since the refrigerant that has not been throttled and expanded by the expansion valve 65 has a higher pressure and is in a high-pressure environment, while the first branch flow path 62 is in a low-pressure or normal-pressure environment, in some embodiments, a booster pump can be installed in the guide flow path 60 to pressurize the liquid refrigerant so that it can flow better to the refrigerant that has not been throttled and expanded by the expansion valve 65.

[0057] Of course, in some embodiments, the refrigerant main flow path 50 is also provided with an expansion valve 65, which is located between the outdoor heat exchanger 20 and the indoor heat exchanger 10; the other end of the first branch flow path 62 is located between the outdoor heat exchanger 20 and the expansion valve 65; the guide flow path 60 also includes a second branch flow path 63 and a selection switching device, one end of which is connected to the other end of the guide main flow path 61, and the other end is connected to the refrigerant main flow path 50, and is located between the indoor heat exchanger 10 and the expansion valve 65; the selection switching device is used to selectively switch the refrigerant flowing out of the guide main flow path 61 to one of the first branch flow path 62 and the second branch flow path 63.

[0058] In this embodiment, by setting the selection switching device and the second branch flow path 63, when the air conditioner 100 is in cooling mode, the selection switching device can direct the refrigerant from the main flow path 61 to the main refrigerant flow path 50 through the second branch flow path 63, where it merges with the low-pressure refrigerant after throttling and expansion by the expansion valve 65. When the air conditioner 100 is in heating mode, the selection switching device can direct the refrigerant from the main flow path 61 to the main refrigerant flow path 50 through the first branch flow path 62, directing the liquid refrigerant between the expansion valve 65 and the outdoor heat exchanger 20, where it merges with the low-pressure refrigerant after throttling and expansion by the expansion valve 65. With this configuration, regardless of whether it is in cooling or heating mode, the refrigerant flowing out of the guide flow path 60 can merge with the low-pressure refrigerant after throttling and expansion by the expansion valve 65, allowing the liquid refrigerant in the guide flow path 60 to flow more effectively to the main refrigerant flow path 50.

[0059] In some embodiments, the guide flow path 60 further includes a third branch flow path 64, one end of which is connected to the other end of the guide main flow path 61, and the other end is connected to the refrigerant main flow path 50, and is located between the outdoor heat exchanger 20 and the control valve 30; the selection switching device is also used to selectively switch the refrigerant flowing out of the guide main flow path 61 to one of the first branch flow path 62, the second branch flow path 63 and the third branch flow path 64.

[0060] In the scheme of this embodiment, by setting the third branch flow path 64, when the air conditioner 100 is in cooling mode, the liquid refrigerant in the gas-liquid separator 70 can be combined with the high-temperature and high-pressure refrigerant flowing out of the refrigerant outlet of the compressor 40 through the third branch flow path 64, thereby reducing the pressure and temperature in the outdoor heat exchanger 20. Even in extreme environments where the outdoor ambient temperature is 60-70℃, the air conditioner 100 can operate normally and reliably, thereby improving the reliability of the operation of our air conditioner 100.

[0061] It should be noted that since the refrigerant discharged by the compressor 40 is at high temperature and high pressure, while the liquid refrigerant separated by the gas-liquid separator 70 is at low pressure, the amount of refrigerant that can flow to the main refrigerant path 50 through the third branch path 64 is relatively small if no intervention is required.

[0062] Therefore, in some embodiments, a first booster pump 66 is provided on the third branch flow path 64. By providing the first booster pump 66, the refrigerant in the third branch flow path 64 can be pressurized and then pumped into the refrigerant main flow path 50 for heat exchange, thereby increasing the amount of refrigerant flowing into the refrigerant main flow path 50.

[0063] In some embodiments, the air conditioner 100 includes a cooling mode and a heating mode; when the air conditioner 100 is in cooling mode, the selection switching device is used to selectively switch the refrigerant flowing out of the main flow path 61 to one of the second branch flow path 63 and the third branch flow path 64; when the air conditioner 100 is in heating mode, the selection switching device is used to selectively switch the refrigerant flowing out of the main flow path 61 to the first branch flow path 62.

[0064] In the corresponding embodiment, in cooling mode, the selection and switching device is used to select and switch the refrigerant flowing out of the main flow path 61 to one of the second branch flow path 63 and the third branch flow path 64. When directed to the second branch flow path 63, it can merge with the refrigerant after it has been throttled and expanded by the expansion valve 65 and flow together to the indoor heat exchanger 10 for evaporative heat exchange. When directed to the third branch flow path 64, it can reduce the temperature and pressure in the outdoor heat exchanger 20 and improve the reliability of the air conditioner 100.

[0065] When the air conditioner 100 is in heating mode, the selection switching device is used to select and switch the refrigerant flowing out of the main flow path 61 to the first branch flow path 62, so that the liquid refrigerant and the refrigerant after being throttled and expanded by the expansion valve 65 can merge together and flow to the outdoor heat exchanger 20 for evaporative heat exchange, which has little impact on the heating effect of the air conditioner 100.

[0066] Specifically, in cooling mode, the system selects to switch to either the second branch flow path 63 or the third branch flow path 64. The specific selection conditions are not limited; they can be random or based on the outdoor ambient temperature. In some embodiments, when the outdoor ambient temperature is within a first preset range, the system selects to switch to the second branch; when the outdoor ambient temperature is above the first preset range, the system selects to switch to the third branch.

[0067] The specific implementation of the selection and switching device is not limited; it can be in the form of a switching valve 68, a multi-way valve, etc., and is not limited here.

[0068] In some embodiments, the guide flow path 60 includes a plurality of branch flow paths connected to the other end of the guide main flow path 61; the selection switching device includes a plurality of switching valves 68, which are disposed in the plurality of branch flow paths to control the on / off state of the plurality of branch flow paths.

[0069] It should be noted that multiple branch flow paths can include only two branch flow paths, such as the first branch flow path 62 and the second branch flow path 63. In this case, two switching valves 68 are provided to control the opening and closing of the first branch flow path 62 and the second branch flow path 63 respectively. For example, in cooling mode, the switching valve 68 in the first branch flow path 62 is closed, and the switching valve 68 in the second branch flow path 63 is opened, so that the refrigerant in the main flow path 61 can flow to the main refrigerant flow path 50 through the second branch flow path 63. Alternatively, it can include three branch flow paths, such as the first branch flow path 62, the second branch flow path 63, and the third branch flow path 64. In this case, three switching valves 68 are provided, respectively located in the first branch flow path 62, the second branch flow path 63, and the third branch flow path 64.

[0070] In the scheme of this embodiment, by setting multiple switching valves 68 to switch each branch flow path on and off, the stability of the switching is higher, and multiple switching methods can be formed, such as opening multiple branch flow paths at the same time or closing multiple branch flow paths at the same time.

[0071] To prevent refrigerant in the main refrigerant flow path 50 from flowing backwards toward the guide flow path 60, in some embodiments, a one-way valve 69 is provided on the guide flow path 60, and the one-way valve 69 unidirectionally guides the refrigerant main flow path 50 along the liquid outlet of the gas-liquid separator 70.

[0072] In the solution of this embodiment, by setting the one-way valve 69, the refrigerant in the main refrigerant flow path 50 can be prevented from flowing back towards the guide flow path 60, thereby improving the stability of the entire air conditioner 100 system.

[0073] Specifically, the number of the one-way valves 69 is not limited. There may be only one, for example, on the main guide flow path 61, or there may be multiple valves, such as one on the main guide flow path 61 and one on the branch flow path, etc. There is no limitation here.

[0074] In some embodiments, the main guide path 61 and each of the branch paths are provided with the one-way valve 69, thereby improving the stability of the entire air conditioner 100 system.

[0075] In some embodiments, a second booster pump 67 is provided on the main flow path 61. In this embodiment, by providing the second booster pump 67, the liquid refrigerant in the gas-liquid separator 70 can be better drawn in, allowing more and faster refrigerant to enter the main flow path 50 for re-evaporation and heat exchange.

[0076] The specific number of indoor heat exchangers 10 is not limited. In some embodiments, multiple indoor heat exchangers 10 are provided, and the multiple indoor heat exchangers 10 are arranged in parallel. In this way, one outdoor unit can correspond to multiple indoor units.

[0077] It should be emphasized that, at this time, the other end of the second branch flow path 63 can be located on the main road of the multiple indoor heat exchangers 10, thereby guiding the liquid refrigerant to the multiple indoor heat exchangers 10, or it can be located on the branch road of one of the indoor heat exchangers 10, thereby concentrating the liquid refrigerant to one of the indoor heat exchangers 10, etc., without limitation here.

[0078] The air conditioner provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An air conditioner, characterized in that, include: Indoor heat exchanger; Outdoor heat exchanger; A control valve, the indoor heat exchanger, and the outdoor heat exchanger are interconnected to form a refrigerant main flow path; The compressor has both its refrigerant inlet and refrigerant outlet connected to the control valve, so that the refrigerant flowing out of the compressor's refrigerant outlet is guided by the control valve to the main refrigerant path for heat exchange, and then guided by the control valve to the compressor's refrigerant inlet. A gas-liquid separator, wherein the inlet of the gas-liquid separator is connected to the control valve, and the gas outlet of the gas-liquid separator is connected to the refrigerant inlet of the compressor, so as to guide the heat-exchanged refrigerant gas to the refrigerant inlet of the compressor; and, The guide flow path is connected to the liquid outlet of the gas-liquid separator and the refrigerant main flow path, respectively, so as to guide the liquid refrigerant flowing out of the liquid outlet of the gas-liquid separator to the refrigerant main flow path for re-evaporation.

2. The air conditioner according to claim 1, characterized in that, The guiding flow path includes: A main guide path, one end of which is connected to the liquid outlet of the gas-liquid separator; and... The first branch flow path has one end connected to the other end of the main guide flow path, and the other end connected to the main refrigerant flow path, and is located between the indoor heat exchanger and the outdoor heat exchanger.

3. The air conditioner according to claim 2, characterized in that, The refrigerant main flow path is also equipped with an expansion valve, which is located between the outdoor heat exchanger and the indoor heat exchanger; The other end of the first branch flow path is located between the outdoor heat exchanger and the expansion valve; The guiding flow path also includes: The second branch flow path is connected at one end to the other end of the main guide flow path and at the other end to the main refrigerant flow path, and is located between the indoor heat exchanger and the expansion valve; as well as, The selection switching device is used to selectively switch the refrigerant flowing out of the main flow path to one of the first branch flow path and the second branch flow path.

4. The air conditioner according to claim 3, characterized in that, The guiding flow path also includes: The third branch flow path is connected at one end to the other end of the main guide flow path and at the other end to the main refrigerant flow path, and is located between the outdoor heat exchanger and the control valve; The selection and switching device is also used to select and switch the refrigerant flowing out of the main flow path to one of the first branch flow path, the second branch flow path, and the third branch flow path.

5. The air conditioner according to claim 4, characterized in that, The air conditioner includes a cooling mode and a heating mode; When the air conditioner is in cooling mode, the selection switching device is used to select and switch the refrigerant flowing out of the main flow path to one of the second branch flow path and the third branch flow path; When the air conditioner is in heating mode, the selection switching device is used to selectively switch the refrigerant flowing out of the main flow path to the first branch flow path.

6. The air conditioner according to claim 4, characterized in that, A first booster pump is installed on the third branch flow path.

7. The air conditioner according to claim 3, characterized in that, The guiding flow path includes multiple branch flow paths connected to the other end of the main guiding flow path; The selection switching device includes multiple switching valves, which are disposed in multiple branch flow paths to control the on / off state of the multiple branch flow paths.

8. The air conditioner according to claim 2, characterized in that, A one-way valve is provided on the guide flow path, and the one-way valve guides the flow unidirectionally from the liquid outlet of the gas-liquid separator to the main refrigerant flow path.

9. The air conditioner according to claim 2, characterized in that, A second booster pump is installed on the main guide road.

10. The air conditioner according to claim 1, characterized in that, Multiple indoor heat exchangers are provided, and the multiple indoor heat exchangers are arranged in parallel.

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