One-way valve and air conditioner

Abstract

A one-way valve and an air conditioner. The one-way valve comprises a valve seat with a channel penetrating through the valve seat and a valve port at one end; the metal valve core is fixedly mounted in the channel of the valve seat; the metal valve element is of a cup-shaped hollow structure and is configured to move between a valve opening position and a valve closing position relative to the valve seat, in the valve closing position, the outer wall of the metal valve element abuts against the side wall of the valve port so as to block the valve port, fluid is not allowed to flow through the one-way valve in the first direction, and when the fluid flows in the second direction opposite to the first direction, the metal valve element abuts against the side wall of the valve port. The fluid pushes the metal valve element to the valve opening position, so that the outer wall of the metal valve element does not abut against the side wall of the valve port, and the fluid can flow through the metal valve element in the second direction.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority of the invention patent application with the application number 202311800492.8 and the title "One - way valve and air conditioner" filed on December 25, 2023. The entire content of the invention patent application is incorporated herein by reference. Technical field

[0003] The present invention relates to a one - way valve and an air conditioner. Background art

[0004] In the air conditioners of the prior art, a one - way valve is used to allow fluid to flow between a first pipe and a second pipe in a predetermined direction and not to allow fluid to flow in the opposite direction. The valve core of the one - way valve is generally made of a non - metallic material such as a plastic material. When welding the valve seat of the one - way valve to an external pipe, the valve core often cannot withstand the welding temperature. A common method is to wrap the external pipe with a wet towel. However, despite this, there is still a risk that the valve core is affected by high temperature. Therefore, a valve core that can withstand high temperature while keeping the mass of the valve core not too large is needed. Summary of the invention

[0005] To overcome the above - mentioned drawbacks, the present application proposes a one - way valve, comprising: a valve seat having a channel therethrough and a valve port at one end; a metal valve core movably installed in the channel of the valve seat; the metal valve core is formed into a cup - shaped hollow structure and configured to be movable relative to the valve seat between an open - valve position and a closed - valve position. In the closed - valve position, the outer wall of the metal valve core abuts against the side wall of the valve port to block the valve port and not allow fluid to flow through the one - way valve in the first direction. When the fluid flows in the second direction opposite to the first direction, the fluid pushes the metal valve core to the open - valve position, so that the outer wall of the metal valve core does not abut against the side wall of the valve port, and the fluid can flow through the metal valve core in the second direction.

[0006] Advantageously, the metal valve core is formed by stretching.

[0007] Advantageously, the one - way valve further comprises a positioning assembly, and the metal valve core is movably positioned in the channel of the valve seat via the positioning assembly.

[0008] Advantageously, the metal valve core includes a positioning shaft fixedly arranged along its central axis.

[0009] The positioning assembly includes:

[0010] A positioning plate fixedly installed on the valve seat;

[0011] The positioning sleeve is fixedly installed on the positioning plate. The positioning sleeve is configured to receive the positioning shaft of the metal valve core, and the positioning shaft is configured to be movable within the positioning sleeve, so that the metal valve core can move between the valve opening position and the valve closing position.

[0012] Advantageously, the metal valve core includes a first cylindrical portion and a conical portion. The positioning shaft is fixedly installed on the conical portion. In the valve opening position, there is a gap between the outer wall of the conical portion and the side wall of the valve port. In the valve closing position, the outer wall of the conical portion abuts against the side wall of the valve port.

[0013] Advantageously, the metal valve core further includes a second cylindrical portion. The conical portion is connected between the first cylindrical portion and the second cylindrical portion. The diameter of the first cylindrical portion is larger than that of the second cylindrical portion. A part of the positioning shaft is fixedly received within the second cylindrical portion.

[0014] Advantageously, the positioning plate has a base plate and at least two web plates extending outward from the base plate. The at least two web plates are fixedly installed on the valve seat, and the positioning sleeve is fixedly installed on the base plate.

[0015] Advantageously, the positioning plate has an I-shaped configuration, including two web plates extending outward from the base plate. The ends of each of the two web plates extend circumferentially in an arc shape.

[0016] Advantageously, the positioning plate has a first web plate, a second web plate, and a third web plate extending outward from the base plate. The positioning sleeve is installed on the base plate. The first web plate, the second web plate, and the third web plate are spaced apart from each other and are fixed to the valve seat.

[0017] Advantageously, the valve seat has a first cross-sectional portion and a second cross-sectional portion. The diameter of the first cross-sectional portion is smaller than that of the second cross-sectional portion. In the valve closing position, there is a first gap between the first cross-sectional portion of the valve seat and the first cylindrical portion of the metal valve core. In the valve opening position, there is a second gap between the first cylindrical portion and the second cross-sectional portion of the valve seat. The first gap is smaller than the second gap.

[0018] Advantageously, the side wall of the metal valve core has holes to communicate the inside and outside of the valve core.

[0019] Advantageously, the valve port is formed by a part of the channel of the valve seat.

[0020] Advantageously, the one-way valve includes a valve port member having an opening therethrough to form the valve port. The valve port member is installed at one end of the valve seat.

[0021] Advantageously, the valve seat has a step. The positioning plate is fixedly installed on the valve seat against the step. The step is configured to be oriented towards the metal valve core such that the positioning plate, the positioning sleeve, and the metal valve core are on the same side of the step.

[0022] Advantageously, the metal valve core is configured such that in the open valve position, the end wall of the metal valve core facing the positioning plate abuts against the positioning plate, and the positioning sleeve is spaced apart from the inner wall of the metal valve core in the first direction.

[0023] Advantageously, the metal valve core is configured such that in the open valve position, the positioning sleeve abuts against the inner wall of the metal valve core in the first direction, and the end wall of the metal valve core facing the positioning plate is spaced apart from the positioning plate.

[0024] Advantageously, the end wall of the metal valve core tapers towards the positioning plate.

[0025] Advantageously, the positioning shaft and the positioning sleeve are configured to form an anti-rotation structure to prevent relative rotation between the two.

[0026] Advantageously, the anti-rotation structure is in the form of a key-slot.

[0027] Advantageously, the anti-rotation structure includes a first plane provided in the positioning shaft and a second plane provided in the positioning sleeve, and the first plane and the second plane are in contact with each other to prevent relative rotation between the positioning shaft and the positioning sleeve.

[0028] Advantageously, the one-way valve is of the normally closed type and is placed in a vertical orientation such that the metal valve core is held in the closed valve position under the action of gravity.

[0029] Advantageously, a biasing member is further included, and the biasing member is configured to bias the metal valve core into a normally closed type or a normally open type.

[0030] Advantageously, the biasing member includes a spring and a spring support plate. The spring support plate is fixedly installed to support the spring. One end of the spring is connected to the outer wall of the metal valve core, and the other end is connected to the elastic support plate, thereby biasing the metal valve core into the normally open type.

[0031] The present application also provides a one-way valve, including: a valve seat having a passage therethrough and a valve port at one end; a valve core movably installed in the passage of the valve seat, and the valve core is configured to be movable relative to the valve seat between an open valve position and a closed valve position. In the closed valve position, the outer wall of the valve core abuts against the side wall of the valve port to block the valve port and prevent fluid from flowing through the valve port in the first direction. When the fluid flows in the second direction opposite to the first direction, the fluid pushes the valve core to the open valve position, so that the outer wall of the valve core does not abut against the side wall of the valve port, and the fluid can flow through the valve port in the second direction; a biasing member configured to bias the valve core to the open valve position.

[0032] Advantageously, the biasing member includes a spring and a spring support plate. The spring support plate is fixedly installed to support the spring. One end of the spring is connected to the outer wall of the valve core, and the other end is connected to the elastic support plate, thereby biasing the valve core to the open valve position.

[0033] Advantageously, the valve port is formed by a part of the passage of the valve seat, and the elastic support plate is fixedly mounted to the valve seat.

[0034] Advantageously, the one-way valve includes a valve port member having an opening therethrough to form a valve port. The valve port member is mounted to one end of the valve seat, and the elastic support plate is fixedly mounted to the valve port member.

[0035] The present application also provides an air conditioner, comprising: a first pipeline; a second pipeline; the one-way valve as described above, wherein the valve seat of the one-way valve is mounted to the first pipeline and the second pipeline such that the passage of the valve seat is in fluid communication with the first pipeline and the second pipeline. Description of the Drawings

[0036] The above and other features and advantages of the exemplary embodiments of the present invention will become more apparent from the following detailed description in conjunction with the drawings, and the description and drawings are for exemplary purposes only and do not limit the scope of the present invention in any way, wherein:

[0037] Figure 1 A cross-sectional view showing a first embodiment of the one-way valve according to the present application connected between a first pipeline and a second pipeline, with the one-way valve in the closed valve position.

[0038] Figure 2 A cross-sectional view showing a first embodiment of the one-way valve according to the present application connected between a first pipeline and a second pipeline, with the one-way valve in the open valve position.

[0039] Figure 3 A separate cross-sectional view showing the metal valve core of the first embodiment.

[0040] Figure 4 A separate perspective view showing the metal valve core of the first embodiment.

[0041] Figure 5 Another separate perspective view showing the metal valve core of the first embodiment.

[0042] Figure 6 A separate perspective view showing the positioning assembly of the first embodiment of the one-way valve.

[0043] Figure 7 Showing Figure 6 a cross-sectional view of the positioning assembly.

[0044] Figure 8 A separate cross-sectional view showing the one-way valve of the first embodiment.

[0045] Figure 9 A separate cross-sectional view showing another embodiment of the one-way valve according to the present application.

[0046] Figure 10a A cross-sectional view showing a first example of the anti-rotation structure.

[0047] Figure 10b A cross-sectional view showing a second example of the anti-rotation structure.

[0048] Figure 11 An end cross-sectional view showing the one-way valve of the first embodiment.

[0049] Figure 12 An isolated perspective view showing the positioning assembly of the second embodiment of the one-way valve.

[0050] Figure 13 Showing Figure 12 of the end cross-section.

[0051] Figure 14 A cross-sectional view showing a one-way valve including a valve port member connected between a first pipe and a second pipe, the one-way valve being in a closed valve position.

[0052] Figure 15 A cross-sectional view showing a one-way valve including a valve port member connected between a first pipe and a second pipe, the one-way valve being in an open valve position.

[0053] Figure 16 A cross-sectional view showing a third embodiment of a one-way valve connected between a first pipe and a second pipe, the one-way valve being in an open valve position.

[0054] Figure 17 A cross-sectional view showing a third embodiment of a one-way valve connected between a first pipe and a second pipe, the one-way valve being in a closed valve position. Detailed Description of the Embodiments

[0055] In order to make the objectives, technical solutions, and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments of the present disclosure. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts fall within the scope of protection of the present disclosure.

[0056] Compared with the embodiments shown in the accompanying drawings, the feasible implementation solutions within the scope of protection of the present disclosure may have fewer components, have other components not shown in the accompanying drawings, different components, components arranged differently, or components connected differently, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0057] Unless otherwise defined, technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which this disclosure pertains. The terms "first", "second" and similar terms used in the specification and claims of this patent application of the disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. When the quantity of components is not specified, the quantity of components can be one or more; similarly, similar terms such as "a", "the", "said" do not necessarily denote a quantity limitation. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "upper", "lower", "left", "right" are only used to represent the relative orientation relationship during the use of the device or the orientation relationship shown in the drawings. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0058] Figure 1 A cross-sectional view showing the one-way valve 1 of the first embodiment connected between the first pipe 2 and the second pipe 3, the one-way valve being in the closed valve position, Figure 2 showing the open valve position. The one-way valve 1 includes a valve seat 11 which is installed on the first pipe 2 and the second pipe 3 and has a passage therethrough. A metal valve core 12 is movably disposed in the passage. The metal valve core 12 has a cup-shaped hollow structure, for example formed by stretching, and has a thin outer wall. The metal valve core 12 can move between the open valve position and the closed valve position. In the closed valve position, the outer wall of the metal valve core 12 abuts against the side wall of the valve port 13 of the valve seat 11, thereby blocking the valve port and not allowing fluid to flow from right to left in the first direction. Moreover, the flow of the fluid in the first direction will further press the metal valve core 12 in the closed valve position. When the fluid flows from left to right in the second direction opposite to the first direction, the fluid pushes the metal valve core to move from left to right to the open valve position, thereby allowing the fluid to flow through the metal valve core in the second direction. The metal valve core is made of, for example, red copper, aluminum alloy and stainless steel. When welding the one-way valve with other copper pipes, the metal valve core can withstand a relatively high temperature. For example, the red copper valve core can withstand 400 degrees, the aluminum alloy valve core can withstand 660 degrees, and the stainless steel valve core can withstand 1025 degrees.

[0059] The one-way valve further includes a positioning assembly 14, and the metal valve core is movably positioned in the passage of the valve seat via the positioning assembly. As Figure 3 、 4 and 5 show, the metal valve core 12 includes a positioning shaft 15 (for example made of stainless steel) fixedly provided along its central axis. As Figure 6 、 7As shown in FIGS. 7 and 8, the positioning assembly 14 includes a positioning plate 141 fixedly mounted to the valve seat; a positioning sleeve 142 (e.g., made of stainless steel) fixedly mounted to the positioning plate 141. The positioning sleeve 142 is configured to receive the positioning shaft 15 of the metal valve core, and the positioning shaft 15 is configured to be movable within the positioning sleeve 142, so that the metal valve core can move between an open valve position and a closed valve position.

[0060] The valve seat 11 has a step, and the positioning plate 141 is fixedly mounted to the valve seat against the step. As Figure 8 shown, the step is configured to be oriented away from the metal valve core (towards the right side), such that the positioning plate and the metal valve core are located on opposite sides of the step. That is, the positioning plate is located on the right side of the step, and the metal valve core is located on the left side of the step. This results in, during assembly, the positioning assembly being assembled from the right side and the metal valve core being assembled from the left side. However, due to the inconsistent assembly directions, there is a problem that concentricity is not easily and reliably guaranteed. To solve this problem, as Figure 9 shown, the step 113 is configured to be oriented towards the metal valve core (towards the left side), such that the positioning plate and the metal valve core are located on the same side of the step. That is, the positioning plate and the metal valve core are located on the right side of the step 113. This results in, during assembly, the positioning assembly and the metal valve core being assembled from the right side, and concentricity can be more reliably guaranteed.

[0061] In addition, as Figure 8 shown, when the metal valve core 12 is in the open valve position, the end wall 124 of the metal valve core 12 facing the positioning plate 141 abuts against the positioning plate 141, and the positioning sleeve 142 is spaced apart from the inner wall of the metal valve core in the first direction. Alternatively, as Figure 9 shown, when the metal valve core 12 is in the open valve position, the positioning sleeve 142 abuts against the inner wall of the metal valve core in the first direction, and the end wall 124 of the metal valve core facing the positioning plate is spaced apart from the positioning plate 141. Thus, by providing such a gap, the flow capacity is improved. In this example, the end wall 124 of the metal valve core is conical, tapering towards the positioning plate, thus playing a role in stabilizing the flow.

[0062] When both the positioning shaft and the positioning sleeve are cylindrical, there is a possibility that the positioning shaft rotates relative to the positioning sleeve when the positioning shaft moves within the positioning sleeve. To avoid this situation, the positioning shaft and the positioning sleeve can also form an anti-rotation structure 151 to prevent relative rotation between the two and only allow relative translation.

[0063] Specifically, as Figure 10a shown, the anti-rotation structure is in the form of a key-slot. For example, the outer surface of the positioning shaft has splines, and the inner surface of the corresponding positioning sleeve has a spline groove form. In addition, as Figure 10bAs shown, the anti-rotation structure includes a first plane provided in the positioning shaft and a second plane provided in the positioning sleeve. The first plane and the second plane are in contact with each other to prevent the positioning shaft and the positioning sleeve from rotating relative to each other. The above only describes the form of the anti-rotation structure by way of example. Those skilled in the art should understand that the anti-rotation structure is not limited to this, but can be in any specific suitable form as long as anti-rotation can be achieved.

[0064] The positioning plate 141 has a base plate 1411 and at least two web plates extending outward from the base plate. The at least two web plates are fixedly mounted to the valve seat, and the positioning sleeve is fixedly mounted to the base plate for receiving the positioning shaft. In one example, as Figure 6 and 11 shown, the positioning plate has an I-shaped configuration, including two web plates. The ends of each of the two web plates extend circumferentially by a certain angle and are formed into arcs.

[0065] Figure 12 and 13 show another form of the positioning plate 141'. The positioning plate 141' includes a base plate 1411' and a first web plate 1414, a second web plate 1415, and a third web plate 1416 extending outward from the base plate. The positioning sleeve is mounted to the base plate 1411'. The first web plate, the second web plate, and the third web plate are spaced apart from each other and are fixed to the valve seat. The first web plate, the second web plate, and the third web plate may be evenly spaced or unevenly spaced.

[0066] The metal valve core 12 includes a first cylindrical portion 121, a second cylindrical portion 122, and a conical portion 123 connecting the two. The diameter of the first cylindrical portion 121 is larger than the diameter of the second cylindrical portion 122. A part of the positioning shaft 15 is fixedly received within the second cylindrical portion 122. In the valve-open position, there is a gap between the outer wall of the conical portion and the side wall of the valve port. In the valve-closed position, the outer wall of the conical portion abuts against the side wall of the valve port. As Figure 5 shown, holes 126 are provided on the outer wall of the metal valve core 12. The holes communicate the inside and the outside of the metal valve core to keep the internal and external pressures balanced.

[0067] Alternatively, the metal valve core may also only include the first cylindrical portion and the conical portion. In this case, the positioning shaft is fixedly mounted to the conical portion.

[0068] The valve seat 11 has a first cross-sectional portion 111 and a second cross-sectional portion 112. In the closed valve position, there is a first gap G1 between the first cylindrical portion and the first cross-sectional portion 111. In the open valve position, there is a second gap G2 between the first cylindrical portion and the second cross-sectional portion 112, and the first gap G1 is smaller than the second gap G2. Thus, when the fluid flows from left to right in the second direction, the fluid first passes through the small first gap G1 to quickly move the metal valve core to the open valve position. Then, after reaching the open valve position, the fluid flows through the metal valve core via the large second gap G2.

[0069] In the above description, the valve port 13 is formed by a part of the passage of the valve seat, that is, the valve port 13 and the valve seat are integral. However, as Figure 14 and 15 shown, the valve port 13 can be formed by a separate valve port member 16. The valve port member 16 also has a passage therethrough, and when installed on the valve seat, it is in fluid communication with the passage of the valve seat.

[0070] In the above description, although the check valve is shown in a horizontal orientation, in fact, during operation, the check valve is connected between the vertically placed first pipe and the second pipe in a vertical direction, so that the check valve is of the normally closed type.

[0071] The check valve further includes a biasing member configured to bias the metal valve core of the check valve into the normally closed type. Such biasing members are well known to those skilled in the art, and thus will not be described in detail herein.

[0072] Since the check valve is oriented in the vertical direction, the check valve is held in the closed valve position by its own gravity. When the fluid flows upward, the fluid overcomes the gravity of the check valve and pushes the metal valve core to the open valve position. However, when the pressure of the fluid is insufficient, there is a possibility that the fluid cannot stably hold the metal valve core in the open valve position, that is, the metal valve core may move up and down, thus generating noise.

[0073] To solve the above problems, a third embodiment of the check valve shown in Figure 16 and 17 is proposed. In this embodiment, the biasing member biases the metal valve core of the check valve into the normally open type. The biasing member includes a spring 17 and a spring support plate 18. The spring support plate 18 is fixedly installed to support the spring 17. One end of the spring 17 is connected to the outer wall of the metal valve core 12, and the other end is connected to the elastic support plate 18, thereby supporting the metal valve core in the open valve position. For example, one end of the support spring 17 can be sleeved on the third cylindrical portion.

[0074] When the fluid flows from right to left in the first direction, the fluid overcomes the elastic force of the support spring and pushes the metal valve core from the open valve position to the closed valve position. By Figure 16 and17 In an embodiment, the one-way valve is of the normally open type, eliminating the noise caused by upward movement and being applicable to any orientation, not limited to the vertical orientation.

[0075] In addition, although in the above description, a biasing device is used for the metal valve core to bias the metal valve core to the open position, so that the working orientation of the one-way valve is not limited to the vertical direction, those skilled in the art should understand that the biasing device can also be applied to non-metal valve cores in the prior art, such as plastic valve cores. In such a case, one end of the spring of the biasing device is connected to the outer wall of the valve core, and the other end is connected to the spring support plate. The spring support plate is fixedly installed on the part forming the valve port. For example, when the valve port is a part of the valve seat, the elastic support plate is fixedly installed on the valve seat; when the valve port is formed by a separate valve port member, the elastic support plate is fixedly installed on the valve port member. Thus, through the biasing device, the one-way valve is of the normally open type, eliminating the noise caused by upward movement and being applicable to any orientation, not limited to the vertical orientation.

[0076] This application also relates to an air conditioner having the one-way valve of this application.

[0077] Through the metal valve core of the above one-way valve, the metal valve core can withstand the high temperature during welding. Moreover, the metal valve core has a cup-shaped hollow structure, reducing the mass of the metal valve core. In addition, the metal valve core can adopt internal positioning. Furthermore, the one-way valve of this application can be operated in any orientation, not limited to the vertical orientation.

[0078] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

[0079] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A one-way valve, characterized in that: The one-way valve comprises: a valve seat having a passage therethrough and a valve port at one end; A metal valve core is movably mounted in the passage of the valve seat; A positioning assembly, through which the metal valve core is movably positioned in the passage of the valve seat; The metal valve core is formed into a cup-shaped hollow structure and is configured to be movable relative to the valve seat between an open valve position and a closed valve position. In the closed valve position, the outer wall of the metal valve core abuts against the side wall of the valve port to block the valve port and does not allow the fluid to flow through the valve port in a first direction. When the fluid flows in a second direction opposite to the first direction, the fluid pushes the metal valve core to the open valve position, so that the outer wall of the metal valve core does not abut against the side wall of the valve port, and the fluid can flow through the valve port in the second direction. The metal valve core includes a positioning shaft fixedly arranged along its central axis. The positioning component includes: A positioning plate, fixedly mounted to the valve seat; The positioning sleeve is fixedly mounted on the positioning plate. The positioning sleeve is configured to receive the positioning shaft of the metal valve core, and the positioning shaft is configured to be able to move in the positioning sleeve, so that the metal valve core can move between the valve opening position and the valve closing position.

2. The one-way valve according to claim 1, characterized in that: The metal valve core is formed by stretching.

3. The one-way valve according to claim 1, characterized in that: The metal valve core includes a first cylindrical part and a conical part, and the positioning shaft is fixedly installed on the conical part. In the valve opening position, there is a gap between the outer wall of the conical part and the side wall of the valve port. In the valve closing position, the outer wall of the conical part abuts against the side wall of the valve port.

4. The one-way valve according to claim 3, characterized in that: The metal valve core also includes a second cylindrical part, the conical part is connected between the first cylindrical part and the second cylindrical part, the diameter of the first cylindrical part is larger than the diameter of the second cylindrical part, and a part of the positioning shaft is fixedly received in the second cylindrical part.

5. The one-way valve according to claim 3, characterized in that: The positioning plate comprises a base plate and at least two spokes extending outward from the base plate, the at least two spokes are fixedly mounted on the valve seat, and the positioning sleeve is fixedly mounted on the base plate.

6. The one-way valve according to claim 5, characterized in that: The positioning plate has an I-shape and includes two spokes extending outward from a base plate, and an end portion of each of the two spokes extends in an arc shape along a circumferential direction.

7. The one-way valve according to claim 5, characterized in that: The positioning plate comprises a first spoke, a second spoke and a third spoke extending outward from a base plate, a positioning sleeve is mounted to the base plate, the first spoke, the second spoke and the third spoke are spaced apart from each other and fixed to the valve seat.

8. The one-way valve according to claim 3, characterized in that: The valve seat has a first cross-sectional portion and a second cross-sectional portion, the diameter of the first cross-sectional portion is smaller than the diameter of the second cross-sectional portion, in the closed valve position, there is a first gap between the first cross-sectional portion of the valve seat and the first cylindrical portion of the metal valve core, in the open valve position, there is a second gap between the first cylindrical portion and the second cross-sectional portion of the valve seat, and the first gap is smaller than the second gap.

9. The one-way valve according to any one of claims 1 to 8, characterized in that: The side wall of the metal valve core has a hole to communicate the inside and the outside of the valve core.

10. The one-way valve according to claim 1, characterized in that: The valve port is formed by a portion of a passage of the valve seat.

11. The one-way valve according to claim 1, characterized in that: The one-way valve includes a valve port member having an opening therethrough to form a valve port, the valve port member being mounted to one end of a valve seat.

12. The one-way valve according to any one of claims 1 to 11, characterized in that: The valve seat has a step, and the positioning plate is fixedly mounted to the valve seat against the step. The step is configured to be oriented toward the metal valve core so that the positioning plate and the metal valve core are located on the same side of the step.

13. The one-way valve according to any one of claims 1 to 11, characterized in that: The metal valve core is configured such that in the valve opening position, the end wall of the metal valve core facing the positioning plate abuts against the positioning plate, and the positioning sleeve is spaced apart from the inner wall of the metal valve core along a first direction.

14. The one-way valve according to any one of claims 1 to 11, characterized in that: The metal valve core is configured such that in the valve opening position, the positioning sleeve abuts against the inner wall of the metal valve core along a first direction, and the end wall of the metal valve core facing the positioning plate is spaced apart from the positioning plate.

15. The one-way valve according to claim 14, characterized in that The end wall of the metal valve core gradually tapers toward the positioning plate.

16. The one-way valve according to any one of claims 1 to 11, characterized in that: The positioning shaft and the positioning sleeve are configured to form an anti-rotation structure to prevent the two from rotating relative to each other.

17. The one-way valve according to claim 16, characterized in that The anti-rotation structure is in the form of a key-slot.

18. The one-way valve according to claim 16, characterized in that: The anti-rotation structure includes a first plane arranged in the positioning shaft and a second plane arranged in the positioning sleeve, the first plane and the second plane contact each other to prevent the positioning shaft and the positioning sleeve from rotating relative to each other.

19. The one-way valve according to any one of claims 1 to 11, characterized in that: The check valve is a normally closed type and is placed in a vertical orientation so that the metal valve plug is held in the closed position by gravity.

20. The one-way valve according to any one of claims 1 to 11, characterized in that: Also included is a biasing device configured to bias the metal valve element into a normally closed type or a normally open type.

21. The one-way valve according to claim 20, characterized in that The biasing device includes a spring and a spring support plate, wherein the spring support plate is fixedly installed to support the spring, one end of the spring is connected to the outer wall of the metal valve core, and the other end is connected to the elastic support plate, thereby biasing the metal valve core to a normally open type.

22. A one-way valve, characterized in that: The one-way valve includes: a valve seat having a passage therethrough and a valve port at one end; A valve core is movably mounted in the passage of the valve seat, and the valve core is configured to be movable relative to the valve seat between an open valve position and a closed valve position. In the closed valve position, an outer wall of the valve core abuts against a side wall of the valve port to block the valve port and prevent the fluid from flowing through the valve port in a first direction. When the fluid flows in a second direction opposite to the first direction, the fluid pushes the valve core to the open valve position, so that the outer wall of the valve core does not abut against the side wall of the valve port, and the fluid can flow through the valve port in the second direction. A biasing device is configured to bias the valve core to an open valve position.

23. The one-way valve according to claim 22, characterized in that The biasing device comprises a spring and a spring support plate, wherein the spring support plate is fixedly installed to support the spring, one end of the spring is connected to the outer wall of the valve core, and the other end is connected to the elastic support plate, thereby biasing the valve core to an open valve position.

24. The one-way valve according to claim 23, characterized in that The valve port is formed by a portion of a passage of a valve seat, and the elastic support plate is fixedly mounted to the valve seat.

25. The one-way valve according to claim 23, characterized in that The one-way valve comprises a valve port member having an opening therethrough to form a valve port. The valve port member is mounted to one end of a valve seat, and an elastic support plate is fixedly mounted to the valve port member.

26. An air conditioner, characterized in that: This air conditioner includes: First pipeline; Second pipeline; The one-way valve according to any one of claims 1 to 25, wherein the valve seat of the one-way valve is mounted to the first pipe and the second pipe so that the channel of the valve seat is in fluid communication with the first pipe and the second pipe.

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