Valve structure, outdoor unit and air conditioning system

Abstract

The invention discloses a valve structure, an outdoor unit and an air conditioning system, and relates to the technical field of air conditioner manufacturing, the valve structure comprises a multi-channel valve and a one-way valve, the multi-channel valve can be provided with a valve cavity for containing fluid and an inlet pipe, a first channel communicating with the valve cavity is formed in the inlet pipe, and the inlet pipe communicates with an exhaust pipe of a compressor; the one-way valve is installed in the first channel, the one-way valve can be used for enabling fluid to flow towards the valve cavity from the flow inlet of the first channel in a one-way mode, and therefore high-temperature and high-pressure refrigerant gas exhausted by the compressor can be prevented from flowing back. The one-way valve is integrated in the inlet pipe of the multi-channel valve, and the inlet pipe can serve as a valve body of the one-way valve; the one-way valve is communicated with the valve cavity of the multi-channel valve without additionally arranging a pipeline, so that the length of the pipeline can be reduced, and the cost is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning manufacturing, and in particular to a valve structure, an outdoor unit and an air-conditioning system. Background Art

[0002] At present, a four-way valve is a control valve with four connecting ports, which is usually installed in the piping system of a heat pump air conditioner. The four-way valve can control the movement of the valve core based on the on and off state of the electromagnetic coil, thereby changing the flow direction of the refrigerant and realizing the conversion of the cooling and heating functions of the air conditioner.

[0003] In the related art, the four-way valve is connected to the one-way valve, and when installing the one-way valve, the one-way valve needs to be installed at a specific installation angle to ensure that it can work properly. However, the space inside the air conditioner housing is limited, and there is not enough space to install the four-way valve and the one-way valve on the same straight line. Therefore, it is necessary to increase the length of the pipeline to form a bend to connect the one-way valve and the four-way valve. However, the additional increase in the length of the pipeline will make the pipeline more complicated, and will also increase the refrigerant charge of the pipeline system, resulting in higher costs. Summary of the invention

[0004] The embodiments of the present application provide a valve structure, an outdoor unit, and an air-conditioning system, which can solve the technical problem that connecting a one-way valve and a four-way valve requires additional pipe length, resulting in increased costs.

[0005] In a first aspect, an embodiment of the present application provides a valve structure, which includes:

[0006] A multi-channel valve having a valve cavity for accommodating a fluid and an inlet pipe, wherein the inlet pipe has a first channel communicating with the valve cavity, and the inlet pipe is used to communicate with an exhaust pipe of a compressor;

[0007] A one-way valve is installed in the first channel, and the one-way valve is used to allow the fluid to flow from the inlet of the first channel to the valve cavity in one direction.

[0008] In some embodiments, the one-way valve comprises:

[0009] a valve core installed in the first channel;

[0010] A driving structure is installed in the first channel and is in driving connection with the valve core. The driving structure is used to drive the valve core to move toward the inlet so that the inlet is disconnected from the valve cavity, and the valve core can move away from the inlet under the action of an external force so that the inlet is connected to the valve cavity.

[0011] In some embodiments, the driving structure includes:

[0012] A base, the base is disposed in the first channel and located on a side of the valve core away from the inlet;

[0013] The elastic member is compressed between the valve core and the base to drive the valve core to move toward the direction close to the inlet.

[0014] In some embodiments, the inner side wall of the inlet pipe is convexly arranged inwardly of the first channel to form a convex portion, and the convex portion abuts against a side of the base facing away from the valve core.

[0015] In some embodiments, the base is provided with a limiting column, and the elastic member is plugged into and matched with the limiting column.

[0016] In some embodiments, a peripheral side of the base contacts an inner wall of the first channel, and a connecting channel connecting the first channel and the valve cavity is provided on the base.

[0017] In some embodiments, the inlet tube comprises:

[0018] a first pipe section, wherein a first end of the first pipe section is in communication with the valve cavity, and the first channel is formed inside the first pipe section;

[0019] A transition pipe section, wherein the transition pipe section is connected to the second end of the first pipe section, and the diameter of the transition pipe section gradually decreases along the direction from the first pipe section to the transition pipe section. The interior of the transition pipe section has a first sealing surface, and the first sealing surface is arranged at an angle with the axial direction of the first pipe section. The first sealing surface is used to contact the valve core to close the first channel.

[0020] In some embodiments, the valve core is provided with a second sealing surface, the second sealing surface is arranged at an angle with the axial direction of the first pipe section, and the second sealing surface is used to contact the first sealing surface.

[0021] In some embodiments, the inlet pipe also includes a second pipe section, the second pipe section and the first pipe section are respectively connected to the opposite ends of the transition pipe section, the diameter of the second pipe section is smaller than the diameter of the first pipe section, the second pipe section defines the inlet port, and the second pipe section is connected to the exhaust pipe of the compressor.

[0022] In some embodiments, the multi-channel valve also includes a first connecting pipe, a second connecting pipe and a third connecting pipe connected to the valve cavity, and the first connecting pipe, the second connecting pipe and the third connecting pipe are located on the same side of the valve cavity and are located on opposite sides of the valve cavity with the inlet pipe.

[0023] In some embodiments, at least one of the first connecting pipe, the second connecting pipe and the third connecting pipe is provided with a connecting portion, and the connecting portion is used to connect a pressure sensor.

[0024] In some embodiments, the connecting portion includes a connecting pipe, which is connected to the first connecting pipe, the second connecting pipe and one of the third connecting pipes, and the outer wall surface of the connecting pipe is provided with a threaded structure, and the connecting pipe is threadedly connected to the pressure sensor.

[0025] In some embodiments, the valve structure further includes a copper sleeve, which is plug-fitted with at least one of the inlet pipe, the first connecting pipe, the second connecting pipe, and the third connecting pipe.

[0026] In some embodiments, the valve structure further includes a filter element, and the filter element is disposed in the copper sleeve.

[0027] In some of the embodiments, the valve structure further includes a temperature sensing sleeve, which is disposed on an outer side wall of the copper sleeve and is used for installing a temperature sensor.

[0028] In a second aspect, an embodiment of the present application provides an outdoor unit, which includes a compressor, a heat exchanger, a gas-liquid separator, a throttling device, and the valve structure as described above;

[0029] Among them, the inlet pipe of the valve structure is connected to the exhaust pipe of the compressor, a one-way valve is installed inside the inlet pipe, the first connecting pipe of the valve structure is connected to the heat exchanger, the heat exchanger is connected to the throttling device, the throttling device is connected to the second connecting pipe of the valve structure, the third connecting pipe of the valve structure is connected to the gas-liquid separator, and the gas-liquid separator is connected to the intake pipe of the compressor.

[0030] In a third aspect, an embodiment of the present application provides an air-conditioning system, characterized in that it includes an indoor unit, a piping assembly, and an outdoor unit as described above, and the indoor unit and the outdoor unit are connected through the piping assembly.

[0031] The valve structure, outdoor unit and air conditioning system according to the embodiments of the present application have at least the following technical effects:

[0032] The valve structure includes a multi-channel valve and a one-way valve. The multi-channel valve can have a valve cavity for accommodating fluid and an inlet pipe. A first channel connected to the valve cavity is arranged in the inlet pipe, and the inlet pipe is connected to the exhaust pipe of the compressor, and the one-way valve is installed in the first channel. The one-way valve can be used to allow the fluid to flow from the inlet of the first channel to the valve cavity in one direction, thereby preventing the high-temperature and high-pressure refrigerant gas discharged from the compressor from flowing back. The one-way valve is integrated into the inlet pipe of the multi-channel valve, and the inlet pipe can serve as the valve body of the one-way valve, so that there is no need to add additional pipelines to connect the one-way valve with the valve cavity of the multi-channel valve. Therefore, the pipeline length can be reduced, thereby reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of a three-dimensional structure of a valve structure provided in an embodiment of the present application;

[0035] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0036] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0037] Figure 4 A schematic diagram of the three-dimensional structure of a one-way valve provided in an embodiment of the present application;

[0038] Figure 5 A schematic diagram of the three-dimensional structure of the connecting portion provided in an embodiment of the present application;

[0039] Figure 6 This is a simplified schematic diagram of the structure of the outdoor unit provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 1000, outdoor unit; 100, valve structure; 10, multi-channel valve; 11, valve chamber; 12, inlet pipe; 121, first channel; 122, inlet; 123, first pipe section; 124, transition pipe section; 1241, first sealing surface; 125, second pipe section; 13, first connecting pipe; 14, second connecting pipe; 15, third connecting pipe; 16, connecting part; 161, connecting pipe; 162, threaded structure; 17, copper sleeve; 18, filter element; 19, temperature sensing sleeve; 20, one-way valve; 21, valve core; 211, second sealing surface; 22, driving structure; 221, base; 2211, limit column; 2212, connecting channel; 222, elastic member; 23, convex part; 200, compressor; 300, heat exchanger; 400, throttling device; 500, gas-liquid separator. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] First, see Figures 1 to 3 , is a valve structure 100 provided in an embodiment of the present application, the valve structure 100 includes a multi-channel valve 10 and a one-way valve 20, the multi-channel valve 10 can have a valve cavity 11 and an inlet pipe 12, the valve cavity 11 can accommodate fluid, the inlet pipe 12 can have a first channel 121, the first channel 121 can be connected to the valve cavity 11, and the inlet pipe 12 is connected to the exhaust pipe of the compressor 200, the one-way valve 20 can be installed in the first channel 121, and the one-way valve 20 can be used to allow the fluid to flow from the inlet port 122 of the first channel 121 to the valve cavity 11 in one direction.

[0044] Optionally, the multi-channel valve 10 can be applied to an air-conditioning system. The multi-channel valve 10 realizes the cooling and heating functions of the air-conditioning system by changing the flow direction of the refrigerant. The multi-channel valve 10 can include a main valve body, which can define a valve cavity 11 for accommodating a fluid. The fluid can be a liquid or a gas. An inlet pipe 12 can be connected to the main valve body, and a first channel 121 in the inlet pipe 12 can be connected to the valve cavity 11. A space for installing a one-way valve 20 can be formed in the first channel 121, so that the one-way valve 20 is integrated in the inlet pipe 12. The inlet pipe 12 can also be connected to the exhaust pipe of the compressor 200.

[0045] It can also be said that the inlet pipe 12 of the multi-channel valve 10 can act as the valve body of the one-way valve 20. The one-way valve 20 can be used to allow the fluid to flow unidirectionally from the inlet port 122 of the first channel 121 to the valve chamber 11, thereby preventing the high-temperature and high-pressure refrigerant gas discharged from the compressor 200 from flowing back, so that there is no need to add additional pipelines to set a guide and diversion structure between the multi-channel valve 10 and the exhaust pipe of the compressor 200. Therefore, the length of the pipeline can be reduced, thereby reducing the cost.

[0046] See also Figure 2 and Figure 3 In some embodiments, the one-way valve 20 can include a valve core 21 and a driving structure 22. The valve core 21 and the driving structure 22 can be installed in the first channel 121, and the driving structure 22 can be connected to the valve core 21 in a transmission manner. The driving structure 22 is used to drive the valve core 21 to move toward the direction close to the inlet 122 so that the inlet 122 is disconnected from the valve cavity 11, and the valve core 21 can move in the direction away from the inlet 122 under the action of an external force so that the inlet 122 is connected to the valve cavity 11.

[0047] Optionally, the valve core 21 can be movably arranged in the first channel 121, and the valve core 21 can move along the axial direction of the inlet pipe 12, and the driving structure 22 can be located on the side of the valve core 21 facing away from the inlet port 122. When there is no fluid in the first channel 121, the driving structure 22 can drive the valve core 21 to move toward the inlet port 122, so that the valve core 21 can close the inlet port 122. Alternatively, when there is fluid flowing from the valve cavity 11 to the first channel 121, the fluid can push the valve core 21 toward the inlet port 122, and the valve core 21 can also close the inlet port 122. When the fluid When the fluid enters the first channel 121 from the inlet 122 and flows toward the valve cavity 11, the fluid can impact the valve core 21 and push the valve core 21 in a direction away from the inlet 122, so that the valve core 21 can open the inlet 122, thereby realizing the function of the one-way valve 20 in the inlet pipe 12, so that the fluid can flow unidirectionally from the inlet 122 of the first channel 121 to the valve cavity 11, that is, the function of the one-way valve 20 can be integrated into the inlet pipe 12, and the valve structure 100 in the present application does not need to be externally connected to another one-way valve 20, which can reduce the length of the pipeline connected to the valve structure 100.

[0048] See also Figure 3 and Figure 4 In some embodiments, the driving structure 22 can include a base 221 and an elastic member 222. The base 221 can be disposed in the first channel 121, and the base 221 is located on the side of the valve core 21 away from the inlet 122, and the elastic member 222 can be compressed and disposed between the valve core 21 and the base 221, so that the elastic member 222 can drive the valve core 21 to move toward the inlet 122, thereby closing the inlet 122.

[0049] Optionally, the outer contour of the base 221 can be similar to the inner contour of the inlet pipe 12. For example, if the inlet pipe 12 is generally a round pipe, the base 221 is a round base 221 that matches the round pipe, and the outer contour of the base 221 is smaller than the inner contour of the inlet pipe 12, so that the base 221 can be installed in the inlet pipe 12. Preferably, the base 221 can be installed in the inlet pipe 12 by interference fit, or the base 221 can be fixed in the inlet pipe 12 by snapping, so that the base 221 can be against the elastic member 222. It plays a supporting role, so that the elastic member 222 in a compressed state can drive the valve core 21 to move toward the inlet 122 until the inlet 122 is closed, and when the fluid flows from the inlet 122 to the first channel 121, if the impact force of the fluid acting on the valve core 21 is greater than the elastic force of the elastic member 222 acting on the valve core 21, the fluid can push the valve core 21 to move away from the inlet 122, thereby opening the inlet 122, so that the fluid can enter the first channel 121 from the inlet 122 and flow to the valve cavity 11.

[0050] See also Figure 3 In some embodiments, the inner wall of the inlet pipe 12 can be convexed into the first channel 121 to form a convex portion 23 , and the convex portion 23 can abut against a side of the base 221 facing away from the valve core 21 .

[0051] Optionally, the protrusion 23 can extend into the first channel 121, and the protrusion 23 is supported on the side of the base 221 facing away from the valve core 21, so that the base 221 can be more stably installed in the first channel 121. With the support of the base 221, the elastic member 222 can also better drive the valve core 21 to move toward the direction close to the inlet 122.

[0052] Preferably, the convex portion 23 can be extended along the circumference of the inlet pipe 12 to form a convex portion 23 of an annular structure, and the convex portion 23 can be better supported on the bottom of the base 221 .

[0053] See also Figure 3 In some embodiments, a limiting column 2211 can be provided on the base 221 , and the elastic member 222 can be plugged into and matched with the limiting column 2211 .

[0054] Optionally, the base 221 can include a base 221 body, the base 221 body can be abutted against the protrusion 23, a limiting column 2211 can be provided on the side of the base 221 body facing away from the protrusion 23, and the elastic member 222 can be a spring, the limiting column 2211 can be inserted into the elastic member 222, one end of the elastic member 222 can contact the base 221 body, and the other end of the elastic member 222 can contact the valve core 21, and the limiting member can limit the elastic member 222 to axial movement along the inlet pipe 12, so that the elastic member 222 can more stably drive the valve core 21 to move along the axial direction of the inlet pipe 12 toward the inlet port 122.

[0055] Preferably, the axis of the limit column 2211 is coaxially arranged with the axis of the inlet pipe 12, so that the elastic member 222 plugged into the limit column 2211 can also be coaxially arranged with the inlet pipe 12, so that the elastic member 222 can be extended and retracted along the axial direction of the inlet pipe 12, and can better drive the valve core 21 to move along the axial direction of the inlet pipe 12.

[0056] See also Figure 3 In some embodiments, the peripheral side of the base 221 can contact the inner wall of the first channel 121 , and a connecting channel 2212 connecting the first channel 121 and the valve cavity 11 can be provided on the base 221 .

[0057] Optionally, the peripheral side of the base 221 can produce an interference fit with the inner wall of the first channel 121, so that the peripheral side of the base 221 can be sealed and connected to the inner wall of the first channel 121, and the connecting channel 2212 on the base 221 can connect the first channel 121 with the valve cavity 11, so that the base 221 can connect the first channel 121 and the valve cavity 11 to facilitate fluid flow.

[0058] Optionally, the connecting channel 2212 can extend to the limiting column 2211 , and the connecting channel 2212 can penetrate the limiting column 2211 , further facilitating the passage of the fluid through the first channel 121 .

[0059] See also Figure 1 and Figure 2 In some embodiments, the multi-channel valve 10 can further include a first connecting tube 13, a second connecting tube 14 and a third connecting tube 15, the first connecting tube 13, the second connecting tube 14 and the third connecting tube 15 are all connected to the valve cavity 11, the first connecting tube 13, the second connecting tube 14 and the third connecting tube 15 are located on the same side of the valve cavity 11, and are located on opposite sides of the valve cavity 11 with the inlet pipe 12.

[0060] Optionally, the multi-channel valve 10 can be a four-way valve, and the inlet pipe 12, the first connecting pipe 13, the second connecting pipe 14, and the third connecting pipe 15 are four connecting pipes of the multi-channel valve 10. The multi-channel valve 10 can be arranged in an air-conditioning system. The multi-channel valve 10 is located on the upper part of the compressor 200 of the air-conditioning outdoor unit 1000, and the cooling and heating functions of the air-conditioning system are realized by changing the flow direction of the refrigerant.

[0061] Specifically, the inlet pipe 12 can be arranged at the upper part of the multi-channel valve 10, and the first connecting pipe 13, the second connecting pipe 14, and the third connecting pipe 15 can be arranged at the lower part of the multi-channel valve 10. The inlet pipe 12, the first connecting pipe 13, the second connecting pipe 14, and the third connecting pipe 15 can be connected to the compressor 200, the indoor unit, the evaporator, and the condenser, respectively, wherein the inlet pipe 12 can be connected to the compressor 200, and the one-way valve 20 in the inlet pipe 12 allows the refrigerant to flow only in one direction from the compressor 200 to the valve chamber 11, so as to prevent the refrigerant from flowing back into the compressor 200 when static.

[0062] See also Figure 1 In some embodiments, at least one of the first connecting pipe 13 , the second connecting pipe 14 and the third connecting pipe 15 may be provided with a connecting portion 16 , and the connecting portion 16 may be used to connect to a pressure sensor.

[0063] Optionally, the connecting portion 16 is a structure that can be easily installed, and the connecting portion 16 is designed to be compatible with the connecting port on the pressure sensor, so that the pressure sensor can be assembled on the connecting portion 16, thereby reducing the process of welding the pressure sensor to the pipeline. To be more specific, it reduces complex operations such as wrapping with a wet cloth during the welding process of the pressure sensor.

[0064] See also Figure 1 and Figure 5 In some embodiments, the connecting portion 16 includes a connecting pipe 161, which can be connected to one of the first connecting pipe 13, the second connecting pipe 14 and the third connecting pipe 15, and the outer wall surface of the connecting pipe 161 is provided with a threaded structure 162, and the connecting pipe 161 can be threadedly connected to the pressure sensor.

[0065] Optionally, the connecting pipe 161 can be fixed on one of the first connecting pipe 13, the second connecting pipe 14 and the third connecting pipe 15, and the connecting pipe 161 can be connected to one of the first connecting pipe 13, the second connecting pipe 14 and the third connecting pipe 15. A threaded hole can be provided on the pressure sensor so that the pressure sensor can be threadedly matched with the connecting pipe 161, thereby conveniently installing the pressure sensor on the multi-channel valve 10.

[0066] See also Figure 1In some embodiments, the valve structure 100 can further include a copper sleeve 17 , which can be plugged into and matched with at least one of the inlet pipe 12 , the first connecting pipe 13 , the second connecting pipe 14 , and the third connecting pipe 15 .

[0067] Optionally, the inlet pipe 12 can be plugged into the copper sleeve 17 so that the inlet pipe 12 can be connected to the pipeline through the copper sleeve 17. The copper sleeve 17 has good ductility and corrosion resistance, and can be responsible for carrying the refrigerant between the evaporator, the compressor 200, and the condenser. The copper sleeve 17 has good welding performance and is easy to weld with other pipelines.

[0068] See also Figure 2 and Figure 3 In some embodiments, the valve structure 100 can further include a filter 18 , and the filter 18 can be disposed in the copper sleeve 17 .

[0069] Optionally, the copper sleeve 17 can be plugged into and matched with the inlet pipe 12, and a filter 18 can be integrated inside the copper sleeve 17. The filter 18 can filter the refrigerant entering the valve chamber 11, which is equivalent to integrating the filter into the inlet pipe 12 of the multi-channel valve 10.

[0070] It should be noted that in the relevant technology, the four-way valve is generally connected to the filter by welding, but there is often a plastic filter mesh inside the filter, and a lot of heat will be released during the welding process. Therefore, when welding the filter, the pipeline length is generally increased, so that the filter can be kept away from the welding area to prevent the plastic filter mesh from being damaged.

[0071] The valve structure 100 in the embodiment of the present application integrates the filter element 18 directly into the copper sleeve 17, so that the filter element 18 and the copper sleeve 17 can filter the refrigerant flowing to the inlet pipe 12 after being combined, thereby eliminating the need to weld a filter separately, reducing the filter welding process, and further reducing the pipeline length and reducing costs.

[0072] Of course, the specific integration position of the filter element 18 needs to be set according to the actual pipeline requirements, so the filter element 18 can also be integrated into the copper sleeve 17 connected to the first connecting pipe 13, the second connecting pipe 14 or the third connecting pipe 15.

[0073] See also Figure 1 In some embodiments, the valve structure 100 can further include a temperature sensing sleeve 19 , which can be disposed on the outer side wall of the copper sleeve 17 , and the temperature sensing sleeve 19 can be used to install a temperature sensor.

[0074] Optionally, the copper sleeve 17 can be plugged into and matched with the inlet pipe 12, and the temperature sensing sleeve can be fixed on the outer wall of the copper sleeve 17. For example, the temperature sensing sleeve is flame-welded on the outer wall of the copper sleeve 17. The temperature sensing sleeve can form an installation position for installing a temperature sensor, so that the temperature sensor can be directly fixed in the temperature sensing sleeve 19 to detect the temperature at the entrance of the inlet pipe 12. The temperature sensor can be easily installed by setting the temperature sensing sleeve 19.

[0075] See also Figure 2 and Figure 3 In some embodiments, the inlet pipe 12 can include a first pipe section 123 and a transition pipe section 124. The first end of the first pipe section 123 can be communicated with the valve cavity 11, and the interior of the first pipe section 123 can form a first channel 121. The transition pipe section 124 can be communicated with the second end of the first pipe section 123, and the diameter of the transition pipe section 124 gradually decreases along the direction from the first pipe section 123 to the transition pipe section 124. The interior of the transition pipe section 124 can have a first sealing surface 1241. The first sealing surface 1241 can be set at an angle with the axial direction of the first pipe section 123, and the first sealing surface 1241 can be used to contact the valve core 21 to close the first channel 121.

[0076] Optionally, the first pipe section 123 can be a straight circular tube, and the first channel 121 can be formed inside the first pipe section 123, so that the valve core 21, the elastic member 222 and the base 221 can be arranged in the first pipe section 123, and the valve core 21 is arranged closer to the transition pipe section 124 relative to the base 221, and the inner wall surface of the transition pipe section 124 is a first sealing surface 1241, and the first sealing surface 1241 is inclined relative to the axial direction of the first pipe section 123, and the diameter of the transition pipe section 124 gradually decreases along the direction from the first pipe section 123 to the transition pipe section 124, so that the first sealing surface 1241 is inclined toward the side where the axis of the first pipe section 123 is located.

[0077] When the elastic member 222 drives the valve core 21 to move toward the transition pipe section 124, the valve core 21 can contact the first sealing surface 1241. Under the action of the elastic force of the elastic member 222, the valve core 21 and the first sealing surface 1241 can form a sealing structure, so that the fluid cannot flow from the valve cavity 11 to the first channel 121, so that the first sealing surface 1241 formed by the transition pipe section 124 cooperates with the valve core 21 to close the first channel 121.

[0078] See also Figure 3 In some embodiments, the valve core 21 can be provided with a second sealing surface 211 , the second sealing surface 211 is arranged at an angle with the axial direction of the first pipe section 123 , and the second sealing surface 211 is used to contact the first sealing surface 1241 .

[0079] Optionally, a second sealing surface 211 can be provided at one end of the valve core 21 facing away from the base 221. The second sealing surface 211 and the first sealing surface 1241 are inclined in the same direction, and the second sealing surface 211 is also arranged opposite to the first sealing surface 1241. When the elastic member 222 drives the valve core 21 to move toward the transition pipe section 124, the distance between the second sealing surface 211 and the first sealing surface 1241 gradually decreases until the second sealing surface 211 contacts the first sealing surface 1241. The second sealing surface 211 can fit tightly with the first sealing surface 1241 to form a sealing structure, so that the valve core 21 can better close the first channel 121.

[0080] See also Figure 3 In some embodiments, the inlet pipe 12 can further include a second pipe section 125. The second pipe section 125 and the first pipe section 123 can be respectively connected to the opposite ends of the transition pipe section 124, and the diameter of the second pipe section 125 is smaller than the diameter of the first pipe section 123. The second pipe section 125 defines an inlet port 122, and the second pipe section 125 is connected to the exhaust pipe of the compressor 200.

[0081] Optionally, the fluid can flow from the second pipe section 125 to the transition pipe section 124, and flow into the valve chamber 11 after passing through the first pipe section 123. During this process, the fluid can push the valve core 21 away from the transition pipe section 124, so that the second sealing surface 211 is out of contact with the first sealing surface 1241, and the first channel 121 can be opened.

[0082] It should be noted that when the fluid flows in from the second pipe section 125, the pressure generated by the fluid will act on the valve core 21 and push the valve core 21 to move toward the base 221. During the movement, the valve core 21 gradually compresses the elastic member 222, and the elastic force of the elastic member 222 gradually increases, that is, the resistance to pushing the valve core 21 to open the first channel 121 gradually increases.

[0083] In the embodiment of the present application, the diameter of the second pipe section 125, the transition pipe section 124, and then the first pipe section 123 gradually increases, so the speed of the fluid will gradually slow down. According to Bernoulli's principle, the pressure increases when the flow rate decreases. The increased pressure acts on the valve core 21, which will push the valve core 21 to move toward the base 221. Therefore, the design of the second pipe section 125 with a smaller diameter than the first pipe section 123 helps to generate a larger pressure difference when the fluid enters the valve chamber 11, thereby more effectively pushing the valve core 21 to move.

[0084] Second, see Figure 6 The embodiment of the present application proposes an outdoor unit 1000, which includes a compressor 200, a heat exchanger 300, a gas-liquid separator 500, a throttling device 400 and the valve structure 100 as described above.

[0085] Specifically, the inlet pipe 12 of the valve structure 100 can be connected to the exhaust pipe of the compressor 200, and a one-way valve 20 is integrated inside the inlet pipe 12. The first connecting pipe 13 of the valve structure 100 can be connected to the heat exchanger 300 through a pipeline, the heat exchanger 300 can be connected to the throttling device 400, the throttling device 400 can be connected to the second connecting pipe 14 of the valve structure 100, and the third connecting pipe 15 of the valve structure 100 can be connected to the gas-liquid separator 500, and the gas-liquid separator 500 can be connected to the intake pipe of the compressor 200, so that the one-way valve 20 can prevent the high-temperature and high-pressure refrigerant gas discharged from the compressor 200 from flowing back.

[0086] The beneficial effects of the outdoor unit 1000 in the present application are the same as those of the valve structure 100 in the present application, and will not be described in detail here.

[0087] In a third aspect, an embodiment of the present application further provides an air conditioning system, including an indoor unit, a piping assembly, and an outdoor unit 1000 as described above, wherein the indoor unit and the outdoor unit 1000 are connected via the piping assembly to form a refrigerant circulation.

[0088] The beneficial effects of the air conditioning system in the present application are the same as those of the valve structure 100 in the present application, and will not be described in detail here.

[0089] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0090] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A valve structure, characterized in that: include: A multi-channel valve having a valve cavity for accommodating a fluid and an inlet pipe, wherein the inlet pipe has a first channel communicating with the valve cavity, and the inlet pipe is used to communicate with an exhaust pipe of a compressor; A one-way valve is installed in the first channel, and the one-way valve is used to allow the fluid to flow from the inlet of the first channel to the valve cavity in one direction.

2. The valve structure according to claim 1, characterized in that: The one-way valve comprises: a valve core installed in the first passage; A driving structure is installed in the first channel and is in driving connection with the valve core. The driving structure is used to drive the valve core to move toward the inlet so that the inlet is disconnected from the valve cavity, and the valve core can move away from the inlet under the action of an external force so that the inlet is connected to the valve cavity.

3. The valve structure according to claim 2, characterized in that: The driving structure comprises: A base, the base is disposed in the first channel and located on a side of the valve core away from the inlet; The elastic member is compressed between the valve core and the base to drive the valve core to move toward the direction close to the inlet.

4. The valve structure according to claim 3, characterized in that: The inner side wall of the inlet pipe is convexly arranged inwardly of the first channel to form a convex portion, and the convex portion abuts against a side of the base facing away from the valve core.

5. The valve structure according to claim 3, characterized in that: The base is provided with a limiting column, and the elastic member is plug-fitted with the limiting column.

6. The valve structure according to claim 3, characterized in that: The peripheral side of the base contacts the inner wall of the first channel, and the base is provided with a connecting channel connecting the first channel and the valve cavity.

7. The valve structure according to claim 2, characterized in that: The inlet pipe comprises: a first pipe section, wherein a first end of the first pipe section is in communication with the valve cavity, and the first channel is formed inside the first pipe section; A transition pipe section, wherein the transition pipe section is connected to the second end of the first pipe section, and the diameter of the transition pipe section gradually decreases along the direction from the first pipe section to the transition pipe section. The interior of the transition pipe section has a first sealing surface, and the first sealing surface is arranged at an angle with the axial direction of the first pipe section. The first sealing surface is used to contact the valve core to close the first channel.

8. The valve structure according to claim 7, characterized in that: The valve core is provided with a second sealing surface, the second sealing surface is arranged at an angle with the axial direction of the first pipe section, and the second sealing surface is used to contact the first sealing surface.

9. The valve structure according to claim 7, characterized in that: The inlet pipe also includes a second pipe section, and the second pipe section and the first pipe section are respectively connected to the opposite ends of the transition pipe section, the pipe diameter of the second pipe section is smaller than the pipe diameter of the first pipe section, the second pipe section defines the inlet port, and the second pipe section is connected to the exhaust pipe of the compressor.

10. The valve structure according to claim 1, characterized in that: The multi-channel valve also includes a first connecting pipe, a second connecting pipe and a third connecting pipe connected to the valve cavity. The first connecting pipe, the second connecting pipe and the third connecting pipe are located on the same side of the valve cavity and are located on opposite sides of the valve cavity with the inlet pipe.

11. The valve structure according to claim 10, characterized in that: At least one of the first connecting pipe, the second connecting pipe and the third connecting pipe is provided with a connecting portion, and the connecting portion is used to connect a pressure sensor.

12. The valve structure according to claim 11, characterized in that: The connecting portion includes a connecting pipe, the connecting pipe is connected to one of the first connecting pipe, the second connecting pipe and the third connecting pipe, and a threaded structure is provided on an outer wall surface of the connecting pipe. The connecting pipe is threadedly connected to the pressure sensor.

13. The valve structure according to claim 10, characterized in that: The valve structure further includes a copper sleeve, which is plug-fitted with at least one of the inlet pipe, the first connecting pipe, the second connecting pipe, and the third connecting pipe.

14. The valve structure according to claim 13, characterized in that: The valve structure further comprises a filter element, and the filter element is arranged in the copper sleeve.

15. The valve structure according to claim 13, characterized in that: The valve structure further comprises a temperature sensing sleeve, which is arranged on the outer side wall of the copper sleeve and is used for installing a temperature sensor.

16. An outdoor unit, characterized in that: It comprises a compressor, a heat exchanger, a gas-liquid separator, a throttling device, and a valve structure as claimed in any one of claims 1 to 15; Among them, the inlet pipe of the valve structure is connected to the exhaust pipe of the compressor, a one-way valve is installed inside the inlet pipe, the first connecting pipe of the valve structure is connected to the heat exchanger, the heat exchanger is connected to the throttling device, the throttling device is connected to the second connecting pipe of the valve structure, the third connecting pipe of the valve structure is connected to the gas-liquid separator, and the gas-liquid separator is connected to the intake pipe of the compressor.

17. An air conditioning system, characterized in that: The invention comprises an indoor unit, a piping assembly and the outdoor unit according to claim 16, wherein the indoor unit and the outdoor unit are connected through the piping assembly.

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