Air conditioner

Abstract

The utility model discloses a kind of air conditioners, air conditioner includes outdoor heat exchanger, variable valve, indoor heat exchanger and compressor, outdoor heat exchanger is provided with the first connecting port, second connecting port and third connecting port of intercommunication;Variable valve is provided with first connecting port, second connecting port and third connecting port, first connecting port selectively with one of second connecting port and third connecting port intercommunication, second connecting port is communicated with second connecting port, and third connecting port is communicated with third connecting port;Indoor heat exchanger is provided with first port and second port, and first port is communicated with first connecting port;The outlet of compressor selectively with one of first connecting port, second port intercommunication, and compressor inlet selectively with another of first connecting port and second port intercommunication.The air conditioner of the utility model can dynamically adjust the flow path number and circulation mode of refrigerant in outdoor heat exchanger according to operating state, realize the optimization of heat exchange efficiency, improve the performance and energy-saving effect of system.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to an air conditioner. Background Technology

[0002] For air conditioners with multiple modes such as heating and cooling, the optimal flow path required for the outdoor heat exchanger typically differs depending on the cooling and heating modes and the compressor's operating frequency. Specifically, when the heat exchanger acts as a condenser (e.g., in cooling mode), its pressure loss is relatively small. To improve heat exchange efficiency, the number of flow paths needs to be reduced to increase the refrigerant flow rate, while simultaneously increasing the flow path length, thereby improving the overall heat transfer coefficient of the heat exchanger as a condenser. Conversely, when the heat exchanger acts as an evaporator (e.g., in heating mode), the number of flow paths needs to be appropriately increased to reduce frictional resistance and temperature slip, thereby increasing the heat transfer temperature difference and ultimately reducing compressor power consumption.

[0003] The flow path design of the outdoor heat exchanger in related technologies cannot be flexibly adjusted according to operating conditions. Whether in cooling or heating mode, or with the compressor operating at different frequencies, the number of flow paths in the outdoor unit's heat exchanger remains constant, making it difficult for the air conditioner to achieve optimal heat exchange performance in actual operation. To compensate for the impact of the flow path on the heat transfer coefficient, the only solutions are generally to increase the heat exchange area or increase the compressor's operating frequency. However, increasing the heat exchange area increases the size and cost of the air conditioner, while increasing the compressor's operating frequency increases energy consumption, which is detrimental to the energy-efficient operation of the air conditioner. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide an air conditioner. The air conditioner of this invention, through the connection method and control logic between the variable valve, indoor heat exchanger, and compressor, can adjust the number of refrigerant flow paths and the circulation mode in the outdoor heat exchanger according to the operating status, thereby optimizing heat exchange efficiency and improving system performance and energy saving.

[0005] The air conditioner according to this utility model includes: an outdoor heat exchanger, the outdoor heat exchanger having a first connection port, a second connection port, and a third connection port that are interconnected; a variable valve, the variable valve having a first connection port, a second connection port, and a third connection port, the first connection port being selectively connected to one of the second connection port and the third connection port, the second connection port being connected to the second connection port, and the third connection port being connected to the third connection port; an indoor heat exchanger, the indoor heat exchanger having a first inlet and a second inlet, the first inlet being connected to the first connection port; and a compressor, the compressor outlet being selectively connected to one of the first connection port and the second inlet, and the compressor inlet being selectively connected to the other of the first connection port and the second inlet; wherein the variable valve can control the connection between the first connection port and the second connection port or the third connection port according to the operating state of the air conditioner.

[0006] According to the air conditioner of this invention, the variable valve controls the connection between the first and second or third connection ports based on the current state of the air conditioner. The state of the air conditioner includes various factors, such as the operating mode (cooling or heating), indoor and outdoor ambient temperatures, and the difference between the set temperature and the actual temperature. When the variable valve controls the connection between the first and second connection ports, the refrigerant flows along a specific path between the indoor heat exchanger, the variable valve, and the outdoor heat exchanger; when the first and third connection ports are connected, the refrigerant flow path changes. By combining the different connection methods of the outdoor heat exchanger's ports, the change in the refrigerant flow path can adjust the number of flow paths in the outdoor heat exchanger.

[0007] According to some embodiments of the present invention, the variable valve is provided with a movable slider, which can move according to the operating state of the air conditioner to close one of the second connection port and the third connection port; and / or, the slider can move according to the operating state of the air conditioner to connect the first connection port and the second connection port, and the third connection port is not directly connected to the first connection port, or to connect the first connection port and the third connection port, and the second connection port is not directly connected to the first connection port.

[0008] According to some embodiments of the present invention, the variable valve includes: a valve housing, the valve housing having an inner cavity for moving the slider, the inner cavity having a first connection port, a second connection port and a third connection port; and a slider, the slider being movably disposed in the inner cavity, the slider having a first driving component and a second driving component on both sides, the first driving component and the second driving component being able to drive the slider to move according to the pressure of the first connection port and the first port respectively.

[0009] According to some embodiments of the present invention, the first driving component is configured as a first sealing element, and a first pressure chamber is defined between the first sealing element and the valve housing, the first pressure chamber being in communication with the first connection port; the second driving component is configured as a second sealing element, and a second pressure chamber is defined between the second sealing element and the valve housing, the second pressure chamber being in communication with the first port, a flow guiding cavity is formed between the first sealing element and the second sealing element, at least a portion of the slider is disposed in the flow guiding cavity, and the first pressure chamber and the second pressure chamber are both independent of the flow guiding cavity; wherein the first sealing element and the second sealing element can drive the slider to move according to the pressure difference between the first connection port and the first port.

[0010] According to some embodiments of this utility model, the slider is disposed in the inner cavity and the inner cavity is divided into a first pressure chamber, a second pressure chamber, and a guide chamber, wherein the first pressure chamber and the second pressure chamber are independent of the guide chamber; wherein the first driving component includes: a first temperature sensing bulb, the first temperature sensing bulb being attached to the first connection port; a first connecting pipe, the first connecting pipe connecting the first temperature sensing bulb to the first pressure chamber; the second driving component includes: a second temperature sensing bulb, the second temperature sensing bulb being attached to the first port; a second connecting pipe, the second connecting pipe connecting the second temperature sensing bulb to the second pressure chamber; wherein the slider slides under the action of the medium pressure in the first pressure chamber and the second pressure chamber after the temperature of the first temperature sensing bulb and the second temperature sensing bulb changes.

[0011] According to some embodiments of the present invention, the slider is disposed in the inner cavity and the inner cavity is divided into a first pressure chamber, a second pressure chamber and a flow guiding chamber. The first pressure chamber and the second pressure chamber are independent of the flow guiding chamber. The first pressure chamber is connected to the first connection port and the second pressure chamber is connected to the first port. The first driving component and the second driving component are both constructed as temperature-sensitive elastic elements and elastically deform according to the medium temperature in the first connection port and the medium temperature in the first port, respectively.

[0012] According to some embodiments of the present invention, at least one of the first driving component and the second driving component is configured as an electric drive component, and a temperature sensing or pressure sensing device is provided at both the first connection port and the first port. The electric drive component drives the slider according to the temperature sensing or the pressure sensing device.

[0013] According to some embodiments of the present invention, the air conditioner further includes a throttling device disposed between the first port and the first connection port; and / or the second pressure chamber is connected between the throttling device and the first port; or the second pressure chamber is connected between the throttling device and the first connection port.

[0014] According to some embodiments of the present invention, the air conditioner further includes: a reversing valve, the reversing valve being provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port being connected to the compressor outlet, the second valve port being connected to the first connection port, the third valve port being connected to the second port, and the fourth valve port being connected to the compressor inlet, the first valve port being selectively connected to one of the second valve port and the third valve port, and the fourth valve port being selectively connected to the other of the second valve port and the third valve port.

[0015] According to some embodiments of the present invention, the air conditioner further includes a one-way valve, one end of which is connected between the second connection port and the second connection port, and the other end of which is connected between the first connection port and the second valve port. The one-way valve is open in the flow direction from the second connection port to the second valve port.

[0016] According to some embodiments of the present invention, the variable valve is further provided with a fourth connection port, which is connected between the first connection port and the second valve port through a refrigerant piping. The fourth connection port can be selectively closed or connected to the second connection port.

[0017] According to some embodiments of the present invention, the outdoor heat exchanger includes: a first heat exchange module, one end of which is provided with a second connection port, and the other end of which is connected to the third connection port; and a second heat exchange module, one end of which is provided with the first connection port, and the other end of which is connected to the third connection port.

[0018] According to some embodiments of the present invention, the first heat exchange module includes a plurality of first heat exchange flow paths arranged in parallel, each first heat exchange flow path including a heat transfer tube and fins heat-transferringly connected to the heat transfer tube; and / or the second heat exchange module includes at least one second heat exchange flow path, each second heat exchange flow path including a heat transfer tube and fins heat-transferringly connected to the heat transfer tube.

[0019] According to some embodiments of the present invention, the outdoor heat exchanger further includes a first confluence element, the confluence element including a confluence outlet and a plurality of branch inlets, the confluence outlet forming a second connection port, and the plurality of branch inlets respectively communicating with a plurality of the first heat exchange flow paths.

[0020] According to some embodiments of the present invention, the outdoor heat exchanger further includes a diversity element, which includes a main port and multiple branch ports. The main port is formed as the third connection port, and the multiple branch ports are respectively connected to multiple first heat exchange flow paths and second heat exchange flow paths.

[0021] According to some embodiments of the present invention, the variable valve is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, and a sixth interface; The first interface is connected to the outlet of the compressor and can optionally be connected to the second interface and the fourth interface; The second interface is connected to the second port of the indoor heat exchanger, and the second interface can optionally be connected to the third interface; The third interface is connected to the inlet of the compressor; The fourth interface is connected to the second connection port; The fifth interface and the sixth interface are respectively connected to the third connection port; wherein The variable valve has a cooling state and a heating state; In the cooling state, the second interface is connected to the third interface, the first interface is connected to the fourth interface of the variable valve, and the fifth interface is connected to the sixth interface; In heating mode, the first interface is connected to the second interface, the fifth interface and the sixth interface are connected to the third interface respectively, and the fourth interface is closed.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram illustrating the operating principle of an air conditioner in cooling mode according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the operating principle of an air conditioner in heating mode according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the operating principle of an air conditioner in cooling mode according to another embodiment of the present invention; Figure 4 This is a schematic diagram of the operating principle of an air conditioner in heating mode according to another embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of a variable valve in an air conditioner according to an embodiment of the present invention; Figure 6 This is a cross-sectional schematic diagram of the variable valve of an air conditioner according to another embodiment of the present invention; Figure 7 This is a cross-sectional schematic diagram of the variable valve of an air conditioner according to another embodiment of the present invention; Figure 8 This is a schematic diagram of the operating principle of an air conditioner in cooling mode according to another embodiment of the present invention; Figure 9 yes Figure 8 A cross-sectional schematic diagram of the variable valve of the air conditioner in the embodiment shown; Figure 10 This is a schematic diagram of the operating principle of an air conditioner in heating mode according to another embodiment of the present invention; Figure 11 yes Figure 10 A cross-sectional schematic diagram of the variable valve of the air conditioner in the embodiment shown.

[0024] Figure label: 1. Air conditioner; 11. Outdoor heat exchanger; 111. First connection port; 112. Second connection port; 113. Third connection port; 114. Heat transfer tube; 12. Variable valve; 1211, First connection port; 1212, Second connection port; 1213, Third connection port; 1214, Fourth connection port; 1221. Valve housing; 1222. Inner cavity; 1223. Slider; 1224. First pressure chamber; 1225. Second pressure chamber; 1226. First drive component; 12261. First temperature sensor; 12262. First connecting pipe; 1227. Second drive component; 12271. Second temperature sensor; 12272. Second connecting pipe; 1228. Limiting component; 1231, First Interface; 1232, Second Interface; 1233, Third Interface; 1234, Fourth Interface; 1235, Fifth Interface; 1236, Sixth Interface; 13. Indoor heat exchanger, 131. First inlet, 132. Second inlet; 14. Compressor; 15. Check valve; 16. Reversing valve; 161. First valve port; 162. Second valve port; 163. Third valve port; 164. Fourth valve port; 17. Throttling device. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical 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 utility model based on the specific circumstances.

[0027] The flow path design of the outdoor heat exchanger in related technologies cannot be flexibly adjusted according to operating conditions. Whether in cooling or heating mode, or with the compressor operating at different frequencies, the number of flow paths in the outdoor unit's heat exchanger remains constant, making it difficult for the air conditioner to achieve optimal heat exchange performance in actual operation. To compensate for the impact of the flow path on the heat transfer coefficient, the only solutions are generally to increase the heat exchange area or increase the compressor's operating frequency. However, increasing the heat exchange area increases the size and cost of the air conditioner, while increasing the compressor's operating frequency increases energy consumption, which is detrimental to the energy-efficient operation of the air conditioner.

[0028] The following is for reference. Figures 1-11 An air conditioner 1 according to an embodiment of the present utility model is described.

[0029] like Figures 1-4As shown, the air conditioner 1 according to this utility model includes an outdoor heat exchanger 11, a variable valve 12, an indoor heat exchanger 13, and a compressor 14. The outdoor heat exchanger 11 is provided with a first connection port 111, a second connection port 112, and a third connection port 113 that are interconnected, providing different flow path options for the refrigerant. The flow path of the refrigerant can be flexibly adjusted according to the operating status of the air conditioner 1, thereby adjusting the number of flow paths in the outdoor heat exchanger 11 and optimizing the heat exchange effect.

[0030] The variable valve 12 is provided with a first connection port 1211, a second connection port 1212, and a third connection port 1213. The first connection port 1211 can be selectively connected to one of the second connection port 1212 and the third connection port 1213. The second connection port 1212 is connected to the second connection port 112, and the third connection port 1213 is connected to the third connection port 113. The variable valve 12 can control the connection between the first connection port 1211 and the second connection port 1212 or the third connection port 1213 according to the status of the air conditioner 1, such as cooling or heating mode and the operating frequency of the compressor 14, thereby changing the flow path of the refrigerant in the outdoor heat exchanger 11 and realizing dynamic adjustment of the flow path. The first connection port 1211 can establish a connection relationship with the second connection port 1212 and the third connection port 1213 respectively, but not simultaneously, but switching according to actual needs. By controlling the connection status between the first connection port 1211 and the second connection port 1212 or the third connection port 1213, the flow path of the refrigerant can be changed, thereby adjusting the number of flow paths in the outdoor heat exchanger 11 to adapt to different operating conditions of the air conditioner 1, such as cooling and heating modes, and to optimize the heat exchange efficiency.

[0031] The indoor heat exchanger 13 is provided with a first port 131 and a second port 132, with the first port 131 connected to a first connection port 1211. In cooling mode, the indoor heat exchanger 13 acts as an evaporator, absorbing heat from the room and causing the refrigerant to evaporate; in heating mode, the indoor heat exchanger 13 acts as a condenser, releasing heat into the room and causing the refrigerant to condense. Through its connection with the first connection port 1211 of the variable valve 12, the indoor heat exchanger 13 can exchange refrigerant with different flow paths of the outdoor heat exchanger 11 according to the control of the variable valve 12, thereby adapting to different operating conditions.

[0032] The outlet of compressor 14 can be selectively connected to one of the first connection port 111 and the second port 132, while the inlet of compressor 14 is connected to the other of the first connection port 111 and the second port 132. Compressing the refrigerant increases its pressure and temperature, providing power for the refrigerant's circulation within the system. The selective connectivity of compressor 14's outlet allows it to be connected to either the first connection port 111 of the outdoor heat exchanger 11 or the second port 132 of the indoor heat exchanger 13; similarly, the selective connectivity of compressor 14's inlet allows it to be selectively connected to either the first connection port 111 or the second port 132 of the indoor heat exchanger 13. This allows the refrigerant circulation path to be adjusted according to the operating status of the air conditioner 1, and, in conjunction with the control of the flow path by the variable valve 12, achieves more efficient heat exchange.

[0033] For example, when the air conditioner 1 is in cooling mode, the outlet of the compressor 14 is connected to the first connection port 111, and the inlet of the compressor 14 is connected to the second port 132, so that the refrigerant flows from the outlet of the compressor 14 into the outdoor heat exchanger 11 through the first connection port 111. After the refrigerant flows out of the outdoor heat exchanger 11, it passes through the indoor heat exchanger 13 and flows from the second port 132 to the inlet of the compressor 14.

[0034] When the air conditioner 1 is in heating mode, the outlet of the compressor 14 is connected to the second port 132, and the inlet of the compressor 14 is connected to the first connection port 111, so that the refrigerant flows from the outlet of the compressor 14 into the indoor heat exchanger 13 through the second port 132. After the refrigerant flows out of the indoor heat exchanger 13, it passes through the outdoor heat exchanger 11 and flows from the first connection port 111 and the second connection port 112 to the inlet of the compressor 14.

[0035] The variable valve 12 can control the connection between the first connection port 1211 and the second connection port 1212 or the third connection port 1213 according to the operating status of the air conditioner 1. The variable valve 12 controls the connection between the first connection port 1211 and the second connection port 1212 or the third connection port 1213 according to the operating status of the air conditioner 1. The status of the air conditioner 1 includes various factors, such as the operating mode (cooling or heating), indoor and outdoor ambient temperatures, and the difference between the set temperature and the actual temperature.

[0036] When the variable valve 12 connects the first connection port 1211 to the second connection port 1212, the refrigerant flows along a specific path between the indoor heat exchanger 13, the variable valve 12, and the outdoor heat exchanger 11. When the first connection port 1211 connects to the third connection port 1213, the refrigerant flow path changes. By combining the different connection methods of the outdoor heat exchanger 11, the change in the refrigerant flow path can adjust the number of flow paths in the outdoor heat exchanger 11.

[0037] For example, when the air conditioner 1 is in cooling mode: the variable valve 12 controls the connection between the first connection port 1211 and the second connection port 1212. At this time, the flow path of the refrigerant will be adjusted accordingly, reducing the effective heat exchange area and the number of flow paths, increasing the refrigerant flow rate, and increasing the flow path length, thereby improving the overall heat transfer coefficient of the heat exchanger as a condenser.

[0038] When the air conditioner 1 is in heating mode: the variable valve 12 controls the connection between the first connection port 1211 and the third connection port 1213. The refrigerant can flow through more channels in the outdoor heat exchanger 11, increasing the effective heat exchange area and the number of channels, thereby reducing friction resistance, reducing temperature slip, and thus improving the heat transfer temperature difference, ultimately reducing the power consumption of the compressor 14.

[0039] According to the present invention, the air conditioner 1, through the connection method and control logic between the variable valve 12, the indoor heat exchanger 13 and the compressor 14, can adjust the number of refrigerant flow paths and the circulation mode in the outdoor heat exchanger 11 according to the operating status, thereby optimizing the heat exchange efficiency and improving the system performance and energy saving effect.

[0040] According to some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, a movable slider 1223 is provided inside the variable valve 12. By moving the slider 1223 within the variable valve 12 and tightly fitting it against the wall surrounding the second connection port 1212 or the third connection port 1213, a good sealing effect is achieved, thereby closing the second connection port 1212 or the third connection port 1213. Closing the second connection port 1212 can be understood as: the second connection port 1212 is not connected to either the first connection port 1211 or the third connection port 1213; closing the third connection port 1213 can be understood as: the third connection port 1213 is not connected to either the first connection port 1211 or the second connection port 1212.

[0041] When slider 1223 moves to a specific position, it completely blocks the connection between the second connection port 1212 and the internal passage of the variable valve 12, preventing refrigerant from entering or exiting the variable valve 12 through the second connection port 1212. At this time, the refrigerant can only flow within the variable valve 12 through the first connection port 1211 and the third connection port 1213, thereby changing the flow path of the refrigerant in the air conditioning system.

[0042] Similarly, when the slider 1223 moves to another specific position, it will close the connection between the third connection port 1213 and the internal channel of the variable valve 12, and the refrigerant can only flow through the first connection port 1211 and the second connection port 1212.

[0043] The slider 1223 can move according to the operating state of the air conditioner 1 to close one of the second connection port 1212 and the third connection port 1213; and / or, the slider 1223 can move according to the operating state of the air conditioner to connect the first connection port 1211 and the second connection port 1212, and the third connection port 1213 and the first connection port 1211 are not directly connected, or to connect the first connection port 1211 and the third connection port 1213, and the second connection port 1212 and the first connection port 1211 are not directly connected. By controlling the connection between the first connection port 1211, the second connection port 1212 and the third connection port 1213 through the movement of the slider 1223, the flow path of the refrigerant in the system can be dynamically adjusted according to the actual operating state of the air conditioner 1, thereby adjusting the number of flow paths in the outdoor heat exchanger 11 to adapt to different operating conditions of the air conditioner 1 and optimize the heat exchange efficiency.

[0044] When the state of the air conditioner 1 changes, the slider 1223 in the variable valve 12 will respond to the change in the state of the air conditioner 1 and start to move according to the preset control logic, thereby adjusting the refrigerant flow path in the air conditioning system and correspondingly increasing or decreasing the number of flow paths in the outdoor heat exchanger 11.

[0045] According to some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the variable valve 12 includes a valve housing 1221 and a slider 1223. The valve housing 1221 provides space for the installation and operation of internal components. The valve housing 1221 has an inner cavity 1222 for the movement of the slider 1223, so that the slider 1223 can move in the inner cavity 1222 in a preset manner, thereby realizing the control of the refrigerant flow path.

[0046] The inner cavity 1222 is provided with a first connection port 1211, a second connection port 1212 and a third connection port 1213. The first connection port 1211, the second connection port 1212 and the third connection port 1213 are channels for refrigerant to enter and exit the variable valve 12 and for flow path switching inside the variable valve 12.

[0047] The slider 1223 is movably disposed within the inner cavity 1222. When the slider 1223 moves to a specific position, it can tightly fit against the wall surrounding the second connection port 1212 or the third connection port 1213, achieving a good sealing effect and thus closing the corresponding connection port. For example, when the slider 1223 moves to a position that completely blocks the communication between the second connection port 1212 and the internal channel of the variable valve 12, the refrigerant cannot enter or exit the variable valve 12 through the second connection port 1212, and can only flow within the variable valve 12 through the first connection port 1211 and the third connection port 1213, thereby changing the flow path of the refrigerant in the air conditioning system. Similarly, when the slider 1223 moves to a position that closes the third connection port 1213, the refrigerant can only flow through the first connection port 1211 and the second connection port 1212.

[0048] The slider 1223 is provided with a first driving component 1226 and a second driving component 1227 on both sides. The first driving component 1226 and the second driving component 1227 enable the slider 1223 to move according to the state of the air conditioner 1. The first driving component 1226 and the second driving component 1227 can drive the slider 1223 to move according to the pressure of the first connection port 111 and the first port 131, respectively. During the operation of the air conditioning system, the refrigerant pressure at the first connection port 111 and the first port 131 will change with the operating state of the air conditioner 1.

[0049] When the air conditioner 1 is in a certain operating state, causing an increase in pressure at the first connection port 111, the first drive component 1226 senses the pressure change at the first connection port 111 and generates a corresponding driving force, pushing the slider 1223 to move. Similarly, when the pressure at the first port 131 changes, the second drive component 1227 generates a driving force according to the pressure change, causing the slider 1223 to move in the opposite direction. Through the response of the first drive component 1226 and the second drive component 1227 to pressure changes, the slider 1223 can move to the desired position, thereby controlling the refrigerant flow path.

[0050] It should be noted that, for the entire air conditioning system: When slider 1223 moves upward to a stable position: P1*A1+F1= P2*A2 When slider 1223 moves downward to a stable position: P2*A2+F2= P1*A1 In the formula: A1 is the cross-sectional area of ​​the first pressure chamber 1224, A2 is the cross-sectional area of ​​the second pressure chamber 1225, F1 is the friction force of the slider 1223. The specific value of the friction force depends on the friction coefficient and material parameters of the slider 1223 and the variable valve 12 body. The setting of the friction force mainly depends on the pressure difference between P1 and P2.

[0051] Taking a standard 35-liter unit as an example, during cooling operation, when the refrigerant is R32 and the P1-P2 range is 0.6~2.7 MPa, slider 1223 needs to move downwards; when the refrigerant is R290 and the P3-P1 range is 0.4~1.5 MPa, slider 1223 also needs to move downwards. During heating operation, when the refrigerant is R32 and the P2-P1 range is 0.9~2.6 MPa, slider 1223 needs to move upwards; when the refrigerant is R290 and the P3-P1 range is 0.5~1.4 MPa, slider 1223 also needs to move upwards. The friction coefficient of slider 1223 can be designed according to the recommended values ​​in Table 1.

[0052] Table 1. Recommended absolute values ​​of pressure difference P1 and P2 for switching the slider 1223 position of variable valve 12.

[0053] According to some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the first drive component 1226 is configured as a first seal. The first seal and the valve housing 1221 define a first pressure chamber 1224. The first pressure chamber 1224 is connected to the first connection port 111, so that the refrigerant pressure at the first connection port 111 can be directly applied to the first pressure chamber 1224, thereby generating pressure on the first seal.

[0054] The second drive component 1227 is configured as a second seal. A second pressure chamber 1225 is defined between the second seal and the valve housing 1221. The second pressure chamber 1225 communicates with the first port 131, allowing the refrigerant pressure at the first port 131 to be transmitted into the second pressure chamber 1225, applying pressure to the second seal. A flow guide cavity is formed between the first seal and the second seal. At least a portion of the slider 1223 is disposed within the flow guide cavity. Both the first pressure chamber 1224 and the second pressure chamber 1225 are independent of the flow guide cavity.

[0055] The first and second seals can drive the slider 1223 to move according to the pressure difference between the first connection port 111 and the first port 131.

[0056] When the pressure at the first connection port 111 is greater than the pressure at the first port 131, the pressure in the first pressure chamber 1224 is higher than the pressure in the second pressure chamber 1225, and the pressure on the first seal is greater than the pressure on the second seal. This pressure difference generates a thrust on the slider 1223 towards the second seal, causing the slider 1223 to move towards the second seal. As the slider 1223 moves, the connection states of the first connection port 1211, the second connection port 1212, and the third connection port 1213 within the variable valve 12 change, thereby adjusting the flow path of the refrigerant in the air conditioning system.

[0057] Conversely, when the pressure at the first port 131 is greater than the pressure at the first connection port 111, the pressure in the second pressure chamber 1225 is higher than the pressure in the first pressure chamber 1224, and the pressure on the second seal is greater than the pressure on the first seal. At this time, the pressure difference generates a thrust on the slider 1223 towards the first seal, pushing the slider 1223 to move towards the first seal. This also changes the connection state of the internal connection port of the variable valve 12, thereby adjusting the refrigerant flow path.

[0058] By using the refrigerant pressure difference between the first connection port 111 and the first port 131 to drive the slider 1223 to move, the variable valve 12 can respond to changes in the operating status of the air conditioning system in real time and quickly. Because the refrigerant pressure changes with the system operating conditions, the pressure difference will also be generated rapidly, thereby driving the slider 1223 to move in a timely manner, adjusting the refrigerant flow path, and optimizing the heat exchange efficiency.

[0059] According to some embodiments of this utility model, such as Figure 7 As shown, the slider 1223 is disposed in the inner cavity 1222 and the inner cavity 1222 is divided into a first pressure chamber 1224, a second pressure chamber 1225, and a guide chamber. The inner cavity 1222 provides a moving space for the slider 1223 and is divided into relatively independent first pressure chamber 1224, second pressure chamber 1225, and guide chamber. At least a portion of the slider 1223 is disposed in the guide chamber, so that the slider 1223 can move under the pressure difference between the first pressure chamber 1224 and the second pressure chamber 1225.

[0060] The first driving component 1226 includes a first temperature sensing element 12261 and a first connecting pipe 12262. The first temperature sensing element 12261 is attached to the first connection port 111. The first temperature sensing element 12261 can sense the temperature change at the first connection port 111 in real time and convert the temperature signal into a pressure signal. The first connecting pipe 12262 connects the first temperature sensing element 12261 to the first pressure chamber 1224. The first connecting pipe 12262 transmits the pressure change caused by the temperature change of the first temperature sensing element 12261 to the first pressure chamber 1224, thereby changing the pressure inside the first pressure chamber 1224.

[0061] The second driving component 1227 includes a second temperature sensor 12271 and a second connecting pipe 12272. The second temperature sensor 12271 is attached to the first port 131 and can sense the temperature change at the first connection port 111 in real time, converting the temperature signal into a pressure signal. The second connecting pipe 12272 connects the second temperature sensor 12271 to the first port 131. The second connecting pipe 12272 transmits the pressure change caused by the temperature change of the second temperature sensor 12271 to the second pressure chamber 1225, thereby changing the pressure inside the second pressure chamber 1225.

[0062] The slider 1223 slides under the pressure of the medium in the first pressure chamber 1224 and the second pressure chamber 1225 after the temperature of the first temperature sensing bulb 12261 and the second temperature sensing bulb 12271 changes.

[0063] When the temperature sensed by the first temperature sensor 12261 and the second temperature sensor 12271 changes, the temperature signal is converted into a pressure signal and transmitted to the first pressure chamber 1224 and the second pressure chamber 1225 through the first connecting pipe 12262 and the second connecting pipe 12272, respectively, causing a change in the pressure within the first pressure chamber 1224 and the second pressure chamber 1225. Since the first pressure chamber 1224 and the second pressure chamber 1225 are relatively independent, a pressure difference is generated, and the slider 1223 slides under the action of the pressure difference. After the slider 1223 slides, it changes the connection state of the first connection port 1211, the second connection port 1212, and the third connection port 1213 within the variable valve 12, thereby adjusting the flow path of the refrigerant in the air conditioning system, ultimately achieving the purpose of adjusting the number of flow paths in the outdoor heat exchanger 11 according to the operating state of the air conditioner 1 and optimizing the heat exchange efficiency.

[0064] By setting up the first temperature sensing element 12261 and the second temperature sensing element 12271, the welding work at the connection port of the first connecting pipe 12262 and the second connecting pipe 12272 is eliminated, making the installation of the variable valve 12 simpler.

[0065] According to some embodiments of the present invention, the slider 1223 is disposed in the inner cavity 1222 and the inner cavity 1222 is divided into a first pressure chamber 1224 and a second pressure chamber 1225. The inner cavity 1222 provides a moving space for the slider 1223 and is divided into two relatively independent first pressure chamber 1224, second pressure chamber 1225 and a flow guide chamber. At least a portion of the slider 1223 is disposed in the flow guide chamber, so that the slider 1223 can move under the pressure difference between the first pressure chamber 1224 and the second pressure chamber 1225.

[0066] The first pressure chamber 1224 is connected to the first connection port 111, so the pressure and temperature changes of the refrigerant at the first connection port 111 can directly affect the first pressure chamber 1224. The second pressure chamber 1225 is connected to the first port 131, so the pressure and temperature changes of the refrigerant at the first port 131 can directly affect the second pressure chamber 1225.

[0067] Both the first driving component 1226 and the second driving component 1227 are constructed as temperature-sensitive elastic elements, and elastically deform according to the medium temperature in the first connection port 111 and the medium temperature in the first port 131, respectively.

[0068] During the operation of the air conditioning system, the refrigerant temperature at the first connection port 111 and the first port 131 changes depending on the operating state of the air conditioner 1. The first drive component 1226 senses the temperature change of the medium in the first connection port 111, and the second drive component 1227 senses the temperature change of the medium in the first port 131. When the temperature-sensing elastic element senses the temperature change, it will generate different degrees of elastic deformation according to the temperature, and generate a corresponding driving force to push the slider 1223 to move. After the slider 1223 moves, it will change the connection state of each connection port in the variable valve 12, such as the first connection port 1211, the second connection port 1212, and the third connection port 1213. By changing the connection state of each connection port, the flow path of the refrigerant between the indoor heat exchanger 13, the variable valve 12, and the outdoor heat exchanger 11 can be adjusted, thereby adjusting the number of flow paths in the outdoor heat exchanger 11.

[0069] The temperature-sensing elastic element can sense temperature changes in real time and generate elastic deformation, allowing the slider 1223 to move in a timely manner, thereby quickly adjusting the refrigerant flow path.

[0070] According to some embodiments of the present invention, at least one of the first driving component 1226 and the second driving component 1227 is configured as an electric drive component. An electric drive component is a device that uses electrical energy to generate driving force, thereby pushing the slider 1223 to move. The electric drive component can precisely control the magnitude and direction of the driving force.

[0071] Temperature or pressure sensors are provided at both the first connection port 111 and the first port 131. The electric drive component drives the slider 1223 based on the temperature or pressure sensors. The temperature sensor is used to monitor the temperature of the refrigerant at the first connection port 111 and the first port 131 in real time. The pressure sensor is used to measure the pressure of the refrigerant at the first connection port 111 and the first port 131. Relevant parameter information can be obtained through the temperature or pressure sensors, providing a basis for the control of the electric drive component.

[0072] Temperature or pressure sensors can quickly detect changes in the refrigerant's state and promptly transmit signals to the control system. Based on the acquired signals, the control system issues control commands to the electric drive component, which then moves the slider 1223. The adjustment process has a short response time. After the slider 1223 moves, it changes the connectivity of various ports within the variable valve 12, such as the first port 1211, the second port 1212, and the third port 1213. By changing the connectivity of these ports, the flow path of the refrigerant between the indoor heat exchanger 13, the variable valve 12, and the outdoor heat exchanger 11 can be adjusted, thereby adjusting the number of flow paths in the outdoor heat exchanger 11.

[0073] According to some embodiments of this utility model, such as Figure 5 and Figure 6As shown, a limiting member 1228 is provided in the inner cavity 1222, which is used to limit the movement stroke of the slider 1223. The limiting member 1228 can abut against the slider 1223 in the inner cavity 1222 to limit the movement stroke of the slider 1223, so that the limiting member 1228 is kept in a preset position to close the corresponding connection port, ensuring that the connection state of the first connection port 1211, the second connection port 1212 and the third connection port 1213 in the variable valve 12 is normal.

[0074] According to some embodiments of this utility model, such as Figures 1-4 As shown, the air conditioner 1 also includes a throttling device 17, which is disposed between the first port 131 and the first connection port 1211; and / or a second pressure chamber 1225 is connected between the throttling device 17 and the first port 131; or, the second pressure chamber 1225 is connected between the throttling device 17 and the first connection port 1211.

[0075] The throttling device 17 is used to regulate the refrigerant flow and pressure. During the operation of the air conditioning system, different operating modes (cooling and heating) and different working conditions require different refrigerant flow and pressure. By controlling the refrigerant flow through the throttling device 17, the effect of throttling and pressure reduction can be achieved.

[0076] A throttling device 17 is located between the first port 131 and the first connection port 1211. Therefore, when the refrigerant flows between the indoor heat exchanger 13 and the variable valve 12, it must pass through the throttling device 17. Whether the refrigerant flows from the first port 131 to the first connection port 1211, or from the first connection port 1211 to the first port 131, it must pass through the throttling device 17.

[0077] The second pressure chamber 1225 is connected between the throttling device 17 and the first port 131, so that the second pressure chamber 1225 can sense the pressure of the refrigerant at that position, which helps to create a pressure difference between the first pressure chamber 1224 and the second pressure chamber 1225, thereby pushing the slider 1223 to move.

[0078] For example, in cooling mode, the pressure in the first pressure chamber 1224 originates from the pressure at the first connection port 111. Since the outdoor heat exchanger 11 is used as a condenser at this time, the refrigerant condenses and releases heat in the outdoor heat exchanger 11, resulting in a high-pressure state for the refrigerant at the first connection port 111, hence the higher pressure in the first pressure chamber 1224. The second pressure chamber 1225 connects to the throttling device 17 and the first port 131. After the refrigerant passes through the throttling device 17, its pressure decreases, thus the pressure in the second pressure chamber 1225 is the lower pressure after throttling by the throttling device 17. Therefore, a pressure difference is formed between the high pressure in the first pressure chamber 1224 and the low pressure in the second pressure chamber 1225. The driving force generated by this pressure difference can push the slider 1223 inside the variable valve 12 to move, thereby changing the flow path of the refrigerant in the air conditioning system to adapt to the operating requirements in cooling mode.

[0079] In heating mode, the pressure in the first pressure chamber 1224 is also determined by the pressure at the first connection port 111. At this time, the outdoor heat exchanger 11 acts as an evaporator, and the refrigerant evaporates and absorbs heat in the outdoor heat exchanger 11. The refrigerant at the first connection port 111 is in a low-pressure state, so the pressure in the first pressure chamber 1224 is relatively low. The second pressure chamber 1225 is connected between the throttling device 17 and the first port 131. In heating mode, the pressure in the second pressure chamber 1225 is the pressure before throttling by the throttling device 17. Since the refrigerant has not undergone pressure reduction before entering the throttling device 17, the pressure is relatively high; that is, the pressure in the second pressure chamber 1225 is the high pressure before throttling by the throttling device 17. Therefore, a pressure difference is generated between the low pressure in the first pressure chamber 1224 and the high pressure in the second pressure chamber 1225. This pressure difference pushes the slider 1223 in the variable valve 12 to move in the opposite direction, thereby adjusting the flow path of the refrigerant to meet the operating requirements in heating mode.

[0080] According to some embodiments of the present invention, the throttling device 17 is configured as an electronic expansion valve or a throttling capillary.

[0081] When the throttling device 17 adopts an electronic expansion valve, it can more accurately adjust the refrigerant flow rate in real time according to the different operating modes of the air conditioner 1 (cooling and heating) and the requirements for refrigerant flow and pressure under different working conditions, so as to achieve a more efficient throttling and pressure reduction effect, further optimize the heat exchange efficiency of the air conditioner 1, and improve system performance and energy saving effect.

[0082] When the throttling device 17 uses a throttling capillary tube, although its adjustment capability is not as flexible as that of an electronic expansion valve, the throttling capillary tube can achieve basic throttling and pressure reduction functions at a lower cost, meeting the system's operating requirements.

[0083] According to some embodiments of this utility model, such as Figures 1-4As shown, the air conditioner 1 also includes a reversing valve 16, which is provided with a first valve port 161, a second valve port 162, a third valve port 163 and a fourth valve port 164 that can be selectively connected to each other, thereby realizing the change of refrigerant flow direction and thus being able to adapt to the working needs of the air conditioner 1 in different operating modes such as cooling mode and heating mode, thereby improving the performance and applicability of the air conditioner 1.

[0084] The first valve port 161 is connected to the outlet of the compressor 14. Therefore, the refrigerant coming out of the compressor 14 will first enter the first valve port 161 of the reversing valve 16, providing the starting point for the subsequent refrigerant flow distribution.

[0085] The second valve port 162 is connected to the first connection port 111 of the outdoor heat exchanger 11, so that the refrigerant in the reversing valve 16 can flow to the outdoor heat exchanger 11 through the second valve port 162. At the same time, the refrigerant in the outdoor heat exchanger 11 can also flow back to the reversing valve 16 through this connection path, so as to control the refrigerant flow direction according to the connection relationship between the second valve port 162 and other valve ports according to the operating mode of the air conditioner 1.

[0086] The third valve port 163 is connected to the second port 132 of the indoor heat exchanger 13, so that the refrigerant in the reversing valve 16 can flow to the indoor heat exchanger 13 through the third valve port 163. At the same time, the refrigerant in the indoor heat exchanger 13 can also flow back to the reversing valve 16 through this connection path, so as to control the refrigerant flow direction according to the connection relationship between the third valve port 163 and other valve ports according to the operating mode of the air conditioner 1.

[0087] The fourth valve port 164 is connected to the inlet of the compressor 14. In order to complete a complete refrigerant cycle, the refrigerant needs to return to the inlet of the compressor 14 through the fourth valve port 164, re-enter the compressor 14 for compression, and start a new cycle.

[0088] For example, in cooling mode, the reversing valve 16 actuates, connecting the first valve port 161 and the second valve port 162, while simultaneously connecting the third valve port 163 and the fourth valve port 164. Refrigerant from the compressor 14 outlet enters the reversing valve 16 through the first valve port 161, and then flows to the outdoor heat exchanger 11 through the second valve port 162. The refrigerant then passes through the variable valve 12 and enters the indoor heat exchanger 13. Finally, the refrigerant returns to the reversing valve 16 through the third valve port 163, and then returns to the compressor 14 inlet through the fourth valve port 164.

[0089] In heating mode, the reversing valve 16 actuates, connecting the first valve port 161 with the third valve port 163, and the second valve port 162 with the fourth valve port 164. Refrigerant from the compressor 14 outlet enters the reversing valve 16 through the first valve port 161, and then flows to the indoor heat exchanger 13 through the third valve port 163. The refrigerant then passes through the variable valve 12 and enters the outdoor heat exchanger 11. Finally, the gaseous refrigerant returns to the reversing valve 16 through the second valve port 162, and then returns to the compressor 14 inlet through the fourth valve port 164.

[0090] According to some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the air conditioner also includes a one-way valve 15. One end of the one-way valve 15 is connected between the second connection port 1212 and the second connection port 112, and the other end of the one-way valve 15 is connected between the first connection port 111 and the second valve port 162. The one-way valve 15 is open in the flow direction from the second connection port 112 to the second valve port 162. The one-way valve 15 is a valve that only allows the refrigerant to flow in one direction and prevents it from flowing in the opposite direction.

[0091] When the refrigerant flows from the second connection port 1212 to the first connection port 111, the pressure of the refrigerant acts on the opening component of the one-way valve 15. When this pressure reaches a certain value and overcomes the internal resistance of the one-way valve 15, the opening component is pushed open, thereby opening the passage and allowing the refrigerant to flow smoothly from the second connection port 1212 to the first connection port 111.

[0092] If the refrigerant attempts to flow back from the first connection port 111 to the second connection port 1212, the force exerted by the refrigerant on the opening component of the check valve 15 is opposite to that during forward flow. This reverse force causes the opening component to fit more tightly against the valve seat, thereby preventing the refrigerant from flowing backward and ensuring that the check valve 15 is closed.

[0093] By controlling the flow path of refrigerant in the air conditioning system through the one-way valve 15, the flow path of refrigerant in the air conditioning system can be adjusted, effectively increasing or decreasing the number of flow paths in the outdoor heat exchanger 11 accordingly.

[0094] When the third connection port 1213 is closed, and the refrigerant flows from the compressor 14 to the first connection port 111, the refrigerant will not flow to the second connection port 1212 due to the one-way valve 15 that unidirectionally flows towards the first connection port 111, provided between the second connection port 1212 and the first connection port 111. Instead, it flows from the first connection port 111 into the outdoor heat exchanger 11. After entering the outdoor heat exchanger 11, it flows along the flow path connected to the first connection port 111, then through the third connection port 113, into the remaining flow path connected to the second connection port 112. Finally, the refrigerant that has completed heat exchange flows out from the second connection port 112. Finally, the refrigerant flowing out from the second connection port 112 flows back to the second connection port 1212.

[0095] According to some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the variable valve 12 is also provided with a fourth connection port 1214. The fourth connection port 1214 is connected between the first connection port 111 and the second valve port 162 through a refrigerant pipe. The fourth connection port 1214 can be selectively closed or connected to the second connection port 1212.

[0096] When the third connection port 1213 and the fourth connection port 1214 are closed, the refrigerant cannot flow through the fourth connection port 1214. At this time, the first connection port 1211 is connected to the second connection port 1212. After entering the outdoor heat exchanger 11, the refrigerant flows along the flow path connected to the first connection port 111, then through the third connection port 113, and into the remaining flow path connected to the second connection port 112. Finally, the refrigerant that has completed heat exchange flows out from the second connection port 112, which is equivalent to reducing the number of flow paths in the outdoor heat exchanger 11 and increasing the flow path length. The refrigerant flowing out from the second connection port 112 enters the variable valve 12 through the second connection port, and then flows to the indoor heat exchanger 13 through the first connection port.

[0097] When the fourth connection port 1214 is connected to the second connection port 1212, the refrigerant entering the variable valve 12 from the fourth connection port 1214 will flow out of the variable valve 12 through the second connection port 1212. At this time, the first connection port 1211 is connected to the third connection port 1213. The refrigerant entering the variable valve 12 through the first connection port 1211 flows out of the variable valve 12 through the third connection port 1213 and then enters the outdoor heat exchanger 11 through the third connection port 113. After entering the outdoor heat exchanger 11, the refrigerant is divided into two parts: one part flows out of the outdoor heat exchanger 11 along the flow path connected to the first connection port 111; the other part flows out of the heat exchanger through the flow path connected to the second connection port 112, and then passes through the second connection port 1212 and the fourth connection port 1214 in sequence, finally flowing to the first connection port 111, realizing the convergence of refrigerant flow, which is equivalent to increasing the number of flow paths in the outdoor heat exchanger 11 and reducing the length of the flow paths.

[0098] By providing a fourth connection port 1214 on the variable valve 12, the air conditioner 1 can adjust the refrigerant flow path within the outdoor heat exchanger 11 according to different operating conditions, thereby increasing or decreasing the number of flow paths within the outdoor heat exchanger 11 and improving heat exchange efficiency. Furthermore, the one-way valve 15 in the above embodiment can be eliminated, reducing the number of components and saving costs.

[0099] According to some embodiments of the present invention, the outdoor heat exchanger 11 includes a first heat exchange module and a second heat exchange module. One end of the first heat exchange module is provided with a second connection port 112, and the other end of the first heat exchange module is connected to a third connection port 113. One end of the second heat exchange module is provided with a first connection port 111, and the other end of the second heat exchange module is connected to a third connection port 113.

[0100] When the first connection port 111 is used as the inlet, the refrigerant enters through the first connection port 111 and flows along the second heat exchange module. Then, it enters the first heat exchange module connected to the second connection port 112 through the third connection port 113. Finally, the refrigerant that has completed heat exchange flows out from the second connection port 112. At this time, the first heat exchange module and the second heat exchange module are connected in series, which is equivalent to reducing the number of flow paths in the outdoor heat exchanger 11 and increasing the length of the flow path.

[0101] When the third connection port 113 is used as the inlet, the refrigerant enters the outdoor heat exchanger 11 through the third connection port 113. Since the third connection port 113 is connected to both the first heat exchange module and the second heat exchange module, the refrigerant will be distributed to the first heat exchange module and the second heat exchange module. Finally, the refrigerant that has completed the heat exchange flows out from the first connection port 111 and the second connection port 112 respectively. At this time, the first heat exchange module and the second heat exchange module are connected in parallel, which is equivalent to increasing the number of flow paths of the outdoor heat exchanger 11.

[0102] According to some embodiments of this utility model, the first heat exchange module includes a plurality of first heat exchange flow paths arranged in parallel. Through the plurality of first heat exchange flow paths arranged in parallel, the refrigerant flowing into the first heat exchange module is dispersed into the plurality of first heat exchange pipes.

[0103] The first heat exchange path includes heat transfer tubes and fins connected to the heat transfer tubes for heat transfer. The heat transfer tubes can hold and allow the refrigerant to flow within them. By adding fins to the heat transfer tubes, the heat exchange area can be increased, thereby improving the heat exchange efficiency.

[0104] According to some embodiments of the present invention, the second heat exchange module includes at least one second heat exchange flow path. There may be one second heat exchange flow path or multiple second heat exchange flow paths connected in parallel. When there is one second heat exchange flow path, the refrigerant flowing into the second heat exchange module is concentrated in that single flow path; when there are multiple second heat exchange flow paths, the refrigerant is dispersed into each of the parallel second heat exchange flow paths.

[0105] The second heat exchange path includes heat transfer tubes and fins connected to the heat transfer tubes for heat transfer. The heat transfer tubes can hold and allow the refrigerant to flow within them. By adding fins to the heat transfer tubes, the heat exchange area can be increased, thereby improving the heat exchange efficiency.

[0106] According to some embodiments of this utility model, the outdoor heat exchanger 11 further includes a first confluence element, which includes a confluence outlet and multiple branch inlets. The confluence outlet forms a second connection port 112 for collecting and outputting the refrigerant that has completed heat exchange. The multiple branch inlets are respectively connected to multiple first heat exchange flow paths, so that the refrigerant flowing out from each first heat exchange flow path can be collected into the first confluence element through each branch inlet and finally flow out uniformly from the second connection port 112. By setting the first confluence element, the refrigerant flow of multiple parallel first heat exchange flow paths can be effectively integrated.

[0107] According to some embodiments of this utility model, the outdoor heat exchanger 11 further includes a diversity element, which includes a main port and multiple branch ports. The main port is formed as a third connection port 113 for centralized input or decentralized output of refrigerant. The multiple branch ports are respectively connected to multiple first heat exchange flow paths and second heat exchange flow paths, so that the refrigerant can be rationally distributed or effectively collected among the multiple first heat exchange flow paths and second heat exchange flow paths through the diversity element. By setting the diversity element, the distribution of refrigerant in the multiple first heat exchange flow paths and second heat exchange flow paths can be realized, optimizing the overall heat exchange performance of the heat exchanger.

[0108] According to some embodiments of this utility model, such as Figures 8-11 As shown, the variable valve 12 is provided with a first interface 1231, a second interface 1232, a third interface 1233, a fourth interface 1234, a fifth interface 1235, and a sixth interface 1236. The multiple interfaces of the variable valve 12 provide channels for the flow of refrigerant between different components. By combining the connection and disconnection of different interfaces, the refrigerant flow path can be adjusted in a variety of ways.

[0109] The first interface 1231 is connected to the outlet of the compressor 14 and can be selectively connected to the second interface 1232 and the fourth interface 1234, so that the refrigerant discharged by the compressor 14 can flow to different paths according to the control of the variable valve 12, providing multiple options for the subsequent circulation of refrigerant in the system.

[0110] The second interface 1232 is connected to the second port 132 of the indoor heat exchanger 13. The second interface 1232 can be selectively connected to the third connection port 1213, so that the refrigerant in the indoor heat exchanger 13 can flow to the inlet of the compressor 14 according to the control of the variable valve 12, thereby completing the circulation of the refrigerant between the indoor heat exchanger 13 and the compressor 14.

[0111] The third interface 1233 is connected to the inlet of the compressor 14, providing a channel for the refrigerant to flow back to the compressor 14, ensuring that the refrigerant can continuously circulate in the system.

[0112] The fourth interface 1234 is connected to the second connection port 112, so that when the air conditioner 1 is in cooling mode, the refrigerant output by the compressor 14 can enter the outdoor heat exchanger 11 through the fourth interface 1234 and participate in the heat exchange process.

[0113] The fifth interface 1235 and the sixth interface 1236 are respectively connected to the third connection port 113, providing additional path options for the flow of refrigerant in the outdoor heat exchanger 11, which helps to adjust the number of flow paths in the outdoor heat exchanger 11. Specifically, the fifth interface 1235 and the sixth interface 1236 are respectively connected to different heat exchange modules that share the same third connection port 113. For example, one end of the first heat exchange module is provided with the second connection port 112, and the other end of the first heat exchange module is connected to the third connection port 113; one end of the second heat exchange module is provided with the first connection port 111, and the other end of the second heat exchange module is connected to the third connection port 113.

[0114] The variable valve 12 has a cooling mode and a heating mode.

[0115] In cooling mode, the second port 1232 and the third port 1233 are connected, forming a channel for refrigerant flow. This allows the refrigerant in the indoor heat exchanger 13 to flow smoothly to the compressor 14 inlet through the second port 1232 and the third port 1233, completing the refrigerant cycle from the indoor heat exchanger 13 to the compressor 14. The first port 1231 is connected to the fourth port 1234. The refrigerant discharged from the compressor 14 flows into the second connection port 112 of the outdoor heat exchanger 11 through the first port 1231 and the fourth port 1234 of the variable valve 12, allowing the refrigerant to exchange heat in the outdoor heat exchanger 11. The fifth port 1235 is connected to the sixth port 1236, further adjusting the refrigerant flow path in the outdoor heat exchanger 11. Combined with the previous connections, this reduces the number of flow paths in the outdoor heat exchanger 11 while increasing the flow path length. For example, in the outdoor heat exchanger 11, the refrigerant first flows through the second connection port 112 into the first heat exchange module, then through the third connection port 113 into the sixth interface 1236, then through the fifth interface 1235 back to the third connection port 113 and into the second heat exchange module, and finally flows out of the outdoor heat exchanger 11 through the first connection interface, thus realizing the heat exchange of the refrigerant in the outdoor heat exchanger 11.

[0116] In heating mode, the first port 1231 and the second port 1232 are connected, allowing the refrigerant discharged from the compressor 14 to flow through the first port 1231 and the second port 1232 to the second port 132 of the indoor heat exchanger 13, ensuring sufficient heat exchange within the indoor heat exchanger 13. Simultaneously, the fifth port 1235 and the sixth port 1236 are connected to the third port 1233, while the fourth port 1234 is closed. After distribution, a portion of the refrigerant output from the indoor heat exchanger 13 flows into the outdoor heat exchanger 11 through the first connection port 111, and the other portion flows into the outdoor heat exchanger 11 through the second connection port 112, allowing heat exchange to occur within the outdoor heat exchanger 11. Based on the aforementioned connections, the flow pattern of the refrigerant in the outdoor heat exchanger 11 is further adjusted, changing the flow path direction. Compared to the cooling mode, the number of flow paths in the outdoor heat exchanger 11 changes, increasing the number of flow paths. For example, refrigerant flows through the second connection port 112 in the first heat exchange module of the outdoor heat exchanger 11, and simultaneously flows through the first connection port 111 in the first heat exchange module, thus achieving heat exchange in the outdoor heat exchanger 11. The refrigerant flowing in the first heat exchange module flows into the variable valve 12 through the sixth port 1236, and the refrigerant flowing in the second heat exchange module flows into the variable valve 12 through the fifth port 1235, thus achieving refrigerant convergence. Finally, the refrigerant flows back to the inlet of the compressor 14 through the third port 1233, completing one refrigerant cycle.

[0117] It should be noted that this embodiment omits the reversing valve 16 used in the above embodiments by using multiple ports of the variable valve 12. In the internal structure of the variable valve 12, the slider 1223 not only has the function of connecting two ports, but also forms a flow channel that can connect two specific ports. When the slider 1223 is in different positions, the refrigerant can flow between different ports according to the design requirements. Moreover, the slider 1223 also has the function of sealing the ports. Through its own movement, the opening and closing states of each port can be precisely controlled.

[0118] In actual operation, the connection relationship between multiple ports on the variable valve 12 can be changed by controlling the movement of slider 1223. Specifically, when slider 1223 moves to the corresponding position, the variable valve 12 can flexibly switch between cooling and heating states according to system requirements. In cooling state, slider 1223 moves to a specific position, so that the ports of the variable valve 12 are connected according to the requirements of the cooling cycle, and the refrigerant circulates in the system according to a predetermined path to achieve the cooling function; while in heating state, slider 1223 moves to another specific position again, changing the connection mode of the ports, allowing the refrigerant to flow according to the path of the heating cycle, thereby achieving the heating effect.

[0119] This embodiment does not limit the movement of the slider 1223. For example, the slider 1223 can be moved in any of the above embodiments, including but not limited to electromagnetic force drive, mechanical transmission mechanism drive, or hydraulic or pneumatic drive, as long as the slider 1223 can move accurately and stably inside the variable valve 12 to meet the needs of changing interface connectivity under different working conditions. Furthermore, this description is merely an explanation of this embodiment, intended to clearly present the technical solution and working principle of this utility model, and does not constitute any limitation on the application scope or implementation method of the technical solution of this utility model.

[0120] The following describes a control method for the air conditioner 1 in at least one of the above embodiments. The control method can adjust the number of refrigerant flow paths in the outdoor heat exchanger 11 according to different operating modes of the air conditioner, so as to optimize the performance and heat exchange efficiency of the air conditioning system.

[0121] Control methods include: After the air conditioner 1 is turned on, the sensors of the control system immediately begin to detect the operating status of the air conditioner. At the same time, the first pressure chamber 1224 acquires the first pressure P1, and the second pressure chamber 1225 acquires the second pressure P2. The pressure difference between the first pressure P1 and the second pressure P2 controls the movement of the slider 1223 in the variable valve 12, thereby changing the refrigerant flow path.

[0122] When the air conditioner is in cooling mode, the outdoor heat exchanger 11 is used as a condenser. At this time, the pressure at the first connection port 111 is higher, that is, P1>P2, which causes the slider 1223 of the variable valve 12 to move to the third connection port 1213.

[0123] The refrigerant circulates in the system. When it reaches the first connection port 111 of the outdoor heat exchanger 11, the one-way valve 15 prevents it from flowing backwards and instead flows entirely into the cooling channel on the lower half of the outdoor heat exchanger 11. Subsequently, because the third connection port 1213 is closed by the slider 1223, the refrigerant cannot flow out from the third connection port 1213 and must change its flow direction, exiting from the upper half of the outdoor heat exchanger 11. Therefore, the outdoor heat exchanger 11 forms a two-inlet, two-outlet flow path, allowing the refrigerant to dissipate heat effectively within the outdoor heat exchanger 11, improving condensation efficiency, and thus enhancing the cooling efficiency of the air conditioner.

[0124] When the air conditioner is in heating mode, the outdoor heat exchanger 11 is used as an evaporator. At this time, the refrigerant pressure after throttling by the throttling device 17 is lower, while the pressure before the throttling device 17 is higher, i.e., P2 > P1, which causes the slider 1223 to move toward the second connection port 1212.

[0125] After throttling, the refrigerant flows from the throttling device 17 into the first connection port 1211 of the variable valve 12. As the slider 1223 moves towards the second connection port 1212, the flow path structure inside the variable valve 12 is altered. The refrigerant flows from the first connection port 1211 to the third connection port 1213, then splits into four paths flowing into the outdoor heat exchanger 11. Subsequently, because the second connection port 1212 is closed by the slider 1223, the refrigerant cannot flow out from the second connection port 1212. It can only flow out from the upper half of the outdoor heat exchanger 11, then merges with the refrigerant flowing out normally from the lower half of the outdoor heat exchanger 11, and finally merges with the refrigerant flowing out normally from the lower half of the outdoor heat exchanger 11. At this point, the outdoor heat exchanger 11 forms a 4-in, 4-out flow path, which increases the contact area between the refrigerant and the outside air, improves the evaporation effect, and thus enhances the heating efficiency of the air conditioner.

[0126] The control system will exit the above variable flow path adjustment control mode when one of the following two conditions is met: Changes in the operating status of the air conditioning system: When the air conditioning system is not in cooling / heating operation, but in fan supply, standby or other states, it means that no special adjustment of the refrigerant flow path is required at this time, and the control system will exit the variable flow path adjustment control mode.

[0127] User operation or power supply abnormalities: When the user turns off the air conditioner or the power is cut off, the air conditioning system stops operating, and the control system will immediately exit the variable flow path adjustment control mode to ensure that the system is in a safe state when it stops operating. At the same time, when restarting, the control system will re-detect the air conditioner's operating status and re-enter the corresponding flow path control mode according to the actual situation.

[0128] Through the above control methods, the air conditioner 1 can automatically adjust the flow path of the refrigerant in the outdoor heat exchanger 11 according to different operating modes, so as to achieve efficient and stable cooling and heating effects, while improving the energy utilization efficiency and reliability of the system.

[0129] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0130] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that, include: An outdoor heat exchanger (11) is provided with a first connection port (111), a second connection port (112) and a third connection port (113) that are connected to each other. A variable valve (12) is provided with a first connection port (1211), a second connection port (1212) and a third connection port (1213). The first connection port (1211) can be selectively connected to one of the second connection port (1212) and the third connection port (1213). The second connection port (1212) is connected to the second connection port (112), and the third connection port (1213) is connected to the third connection port (113). An indoor heat exchanger (13) is provided with a first port (131) and a second port (132), wherein the first port (131) is connected to the first connection port (1211); The compressor (14) has an outlet that can be selectively connected to one of the first connection port (111) and the second port (132), and an inlet that can be selectively connected to the other of the first connection port (111) and the second port (132); in The variable valve (12) can control the first connection port (1211) to connect with the second connection port (1212) or the third connection port (1213) according to the operating status of the air conditioner.

2. The air conditioner according to claim 1, characterized in that, The variable valve (12) is provided with a movable slider (1223), which can move according to the operating state of the air conditioner to close one of the second connection port (1212) and the third connection port (1213); and / or, The slider (1223) can move according to the operating state of the air conditioner to connect the first connection port (1211) and the second connection port (1212), and the third connection port (1213) is not directly connected to the first connection port (1211), or to connect the first connection port (1211) and the third connection port (1213), and the second connection port (1212) is not directly connected to the first connection port (1211).

3. The air conditioner according to claim 2, characterized in that, The variable valve (12) includes: The valve housing (1221) has an inner cavity (1222) inside for the movement of the slider (1223), and the inner cavity (1222) is provided with a first connection port (1211), a second connection port (1212) and a third connection port (1213). A slider (1223) is movably disposed in the inner cavity (1222). A first driving component (1226) and a second driving component (1227) are disposed on both sides of the slider (1223). The first driving component (1226) and the second driving component (1227) can drive the slider (1223) to move according to the pressure of the first connection port (111) and the first port (131), respectively.

4. The air conditioner according to claim 3, characterized in that, The first drive component (1226) is configured as a first seal, and a first pressure chamber (1224) is defined between the first seal and the valve housing (1221), and the first pressure chamber (1224) is connected to the first connection port (111); The second driving component (1227) is configured as a second seal, and a second pressure chamber (1225) is defined between the second seal and the valve housing (1221). The second pressure chamber (1225) communicates with the first port (131). A flow guide cavity is formed between the first seal and the second seal. At least a portion of the slider (1223) is disposed within the flow guide cavity. Both the first pressure chamber (1224) and the second pressure chamber (1225) are independent of the flow guide cavity. The first seal and the second seal can drive the slider (1223) to move according to the pressure difference between the first connection port (111) and the first port (131).

5. The air conditioner according to claim 3, characterized in that, The slider (1223) is disposed in the inner cavity (1222) and is divided into a first pressure chamber (1224), a second pressure chamber (1225), and a guide chamber within the inner cavity (1222). The first pressure chamber (1224) and the second pressure chamber (1225) are both independent of the guide chamber. The first driving component (1226) includes: The first temperature sensor (12261) is attached to the first connection port (111). The first connecting pipe (12262) connects the first temperature sensing bulb (12261) to the first pressure chamber (1224); The second drive component (1227) includes: The second temperature sensor (12271) is attached to the first opening (131); The second connector (12272) connects the second temperature sensor (12271) to the second pressure chamber (1225); wherein The slider (1223) slides under the pressure of the medium in the first pressure chamber (1224) and the second pressure chamber (1225) after the temperature of the first temperature sensing bulb (12261) and the second temperature sensing bulb (12271) changes.

6. The air conditioner according to claim 3, characterized in that, The slider (1223) is disposed in the inner cavity (1222) and is divided into a first pressure chamber (1224), a second pressure chamber (1225), and a guide chamber within the inner cavity (1222). The first pressure chamber (1224) and the second pressure chamber (1225) are both independent of the guide chamber. The first pressure chamber (1224) is connected to the first connection port (111), and the second pressure chamber (1225) is connected to the first port (131). Both the first driving component (1226) and the second driving component (1227) are constructed as temperature-sensitive elastic elements, and elastically deform according to the medium temperature in the first connection port (111) and the medium temperature in the first port (131), respectively.

7. The air conditioner according to claim 3, characterized in that, At least one of the first driving component (1226) and the second driving component (1227) is configured as an electric drive component. Temperature sensing or pressure sensing devices are provided at the first connection port (111) and the first port (131). The electric drive component drives the slider (1223) according to the temperature sensing or pressure sensing device.

8. The air conditioner according to claim 4, characterized in that, The air conditioner also includes a throttling device (17) disposed between the first port (131) and the first connection port (1211); and / or The second pressure chamber (1225) is connected between the throttling device (17) and the first port (131); or, the second pressure chamber (1225) is connected between the throttling device (17) and the first connection port (1211).

9. The air conditioner according to any one of claims 1-8, characterized in that, Also includes: A reversing valve (16) is provided with a first valve port (161), a second valve port (162), a third valve port (163), and a fourth valve port (164). The first valve port (161) is connected to the outlet of the compressor (14), the second valve port (162) is connected to the first connection port (111), the third valve port (163) is connected to the second port (132), and the fourth valve port (164) is connected to the inlet of the compressor (14). The first valve port (161) can be selectively connected to one of the second valve port (162) and the third valve port (163), and the fourth valve port (164) can be selectively connected to the other of the second valve port (162) and the third valve port (163).

10. The air conditioner according to claim 9, characterized in that, The air conditioner also includes a one-way valve (15), one end of which is connected between the second connection port (1212) and the second connection port (112), and the other end of which is connected between the first connection port (111) and the second valve port (162). The one-way valve (15) is open in the flow direction from the second connection port (112) to the second valve port (162).

11. The air conditioner according to claim 9, characterized in that, The variable valve (12) is also provided with a fourth connection port (1214), which is connected between the first connection port (111) and the second valve port (162) through a refrigerant pipe. The fourth connection port (1214) can be selectively closed or connected to the second connection port (1212).

12. The air conditioner according to claim 9, characterized in that, The outdoor heat exchanger (11) includes: A first heat exchange module, one end of which is provided with the second connection port (112), and the other end of which is connected to the third connection port (113); and The second heat exchange module has the first connection port (111) at one end and the third connection port (113) at the other end.

13. The air conditioner according to claim 12, characterized in that, The first heat exchange module includes multiple first heat exchange flow paths arranged in parallel, each first heat exchange flow path including a heat transfer tube and fins connected to the heat transfer tube for heat transfer; and / or The second heat exchange module includes at least one second heat exchange flow path, the second heat exchange flow path including a heat transfer tube and fins connected to the heat transfer tube for heat transfer.

14. The air conditioner according to claim 13, characterized in that, The outdoor heat exchanger (11) further includes a first busbar element, which includes a busbar outlet and multiple branch inlets. The busbar outlet forms the second connection port (112), and the multiple branch inlets are respectively connected to multiple first heat exchange flow paths.

15. The air conditioner according to claim 13, characterized in that, The outdoor heat exchanger (11) further includes a diversity element, which includes a main port and multiple branch ports. The main port is formed as the third connection port (113), and the multiple branch ports are respectively connected to multiple first heat exchange paths and second heat exchange paths.

16. The air conditioner (1) according to claim 1, characterized in that, The variable valve (12) is provided with a first interface (1231), a second interface (1232), a third interface (1233), a fourth interface (1234), a fifth interface (1235) and a sixth interface (1236). The first interface (1231) is connected to the outlet of the compressor (14) and can be optionally connected to the second interface (1232) and the fourth interface (1234) of the variable valve (12); The second interface (1232) is connected to the second port (132) of the indoor heat exchanger (13), and the second interface (1232) may optionally be connected to the third interface (1233); The third interface (1233) is connected to the inlet of the compressor (14); The fourth interface (1234) is connected to the second connection port (112); The fifth interface (1235) and the sixth interface (1236) are respectively connected to the third connection port (113); wherein The variable valve (12) has a cooling state and a heating state; In the cooling state, the second interface (1232) is connected to the third interface (1233), the first interface (1231) is connected to the fourth interface (1234), and the fifth interface (1235) is connected to the sixth interface (1236). In heating mode, the first interface (1231) is connected to the second interface (1232), the fifth interface (1235) and the sixth interface (1236) are connected to the third interface (1233) respectively, and the fourth interface (1234) is closed.

Images