One-way valve and air conditioner

Abstract

The utility model provides a one-way valve and an air conditioner, the one-way valve comprises: a valve body assembly, which is internally provided with an overflowing cavity, the inner wall of the overflowing cavity is provided with a valve port and a connecting port, and the inner wall of the overflowing cavity is also provided with a limiting structure; the limiting sleeve is arranged in the overflowing cavity, and the limiting sleeve is in limiting fit with the limiting structure, so that the limiting sleeve is fixed in the valve body assembly; and the valve element is movably arranged in the limiting channel, and the valve element blocks or opens the valve port through movement. According to the one-way valve, the limiting structure is arranged in the overflowing cavity, the limiting sleeve and the valve body assembly can be fixed through limiting matching of the limiting structure and the limiting sleeve, and therefore the process of welding the limiting sleeve independently can be omitted, assembling steps are simplified, and the risk that a valve port deforms due to high temperature is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, and in particular to a one-way valve and an air conditioner. Background Art

[0002] The air conditioning check valve is one of the important components of the air conditioner. It can control the flow direction of the refrigerant and ensure the normal operation of the system. It is an indispensable part of the air conditioning system.

[0003] In some air conditioning one-way valves, the air conditioning one-way valve usually includes: a valve body, a valve mouth part, a limit sleeve and a valve core. During the assembly process, the limit sleeve usually needs to be fixed to the valve mouth part by welding, and the valve mouth part also needs to be fixed by welding after being installed in the valve body. Therefore, at least two welding steps are required, which not only makes the assembly steps cumbersome, but also the high temperature generated by welding during the welding process is likely to cause the risk of valve mouth deformation. Utility Model Content

[0004] The utility model aims at least to solve the problem in the prior art that a one-way valve has a large number of welding times during assembly, resulting in complicated assembly steps, and proposes a one-way valve and an air conditioner.

[0005] In order to achieve the purpose of the utility model, a one-way valve is provided for connecting between a first pipeline and a second pipeline, the one-way valve comprising: a valve body assembly having a flow chamber arranged therein, a valve port and a connecting port arranged on the inner wall of the flow chamber, the valve port being used to communicate with the first pipeline, the connecting port being used to communicate with the second pipeline, and a limiting structure being further arranged on the inner wall of the flow chamber; a limiting sleeve being arranged in the flow chamber, a flow space being formed between the outer wall of the limiting sleeve and the inner wall of the flow chamber, a limiting channel being arranged inside the limiting sleeve, the limiting channel being communicated with the valve port, a flow hole being arranged on the limiting sleeve, the limiting channel being communicated with the flow space through the flow hole, the limiting sleeve being limitedly matched with the limiting structure so that the limiting sleeve is fixed in the valve body assembly; a valve core being movably arranged in the limiting channel, and the valve core blocking or opening the valve port by moving.

[0006] Optionally, the valve body assembly includes: a valve body, which has a first end and a second end axially, and the limiting structure is arranged on the inner wall of the valve body; a valve mouth piece, which has a first end and a second end axially, the valve mouth piece is inserted into the first end of the valve body, the first end of the valve mouth piece is located in the valve body, the flow chamber is located between the valve mouth piece and the second end of the valve body, and the valve port is arranged at the first end of the valve mouth piece; the limiting sleeve has an abutment portion at one end close to the valve mouth piece, the abutment portion abuts on the first end face of the first end of the valve mouth piece, and the valve mouth piece presses the abutment portion against the limiting structure.

[0007] Optionally, the valve body includes: a plug-in section and a valve core section connected in sequence, the valve mouth piece is plug-fitted with the plug-in section, the valve core is located in the valve core section, and the limiting structure is formed at the connection between the plug-in section and the valve core section.

[0008] Optionally, the inner diameter of the plug-in section is larger than the inner diameter of the valve core section, and the limiting structure is a limiting step formed at the connection between the plug-in section and the valve core section.

[0009] Optionally, the limiting structure is a limiting protrusion formed by an outer peripheral wall of the valve body being recessed inwardly and formed inside the valve body.

[0010] Optionally, the limiting sleeve includes: a limiting sleeve having a first end and a second end in the axial direction, the limiting channel being formed inside the limiting sleeve, and the flow hole being arranged on the limiting sleeve; the abutting portion being connected to the outer peripheral wall of the first end of the limiting sleeve, and the limiting sleeve abuts against the first end face through the abutting portion.

[0011] Optionally, the abutment portion includes: an annular folded edge, the inner circumference of which is connected to the first end of the limiting sleeve, the annular folded edge having a first abutment surface and a second abutment surface in the axial direction, the first abutment surface abuts against the valve mouth piece, and the outer circumference of the second abutment surface abuts against the limiting structure.

[0012] Optionally, the abutting portion further includes: a positioning sleeve connected to the outer peripheral side of the annular folded edge, and the outer peripheral wall of the positioning sleeve abuts against the inner peripheral wall of the valve body.

[0013] Optionally, the outer wall of the valve mouth member has a large diameter section and a small diameter section, the small diameter section is located between the large diameter section and the first end of the valve mouth member, the large diameter section of the valve mouth member abuts against the inner circumferential wall of the valve body, and an avoidance channel is formed between the small diameter section and the inner circumferential wall of the valve body, and the positioning sleeve is located in the avoidance channel.

[0014] Optionally, the valve body assembly includes: a valve body, which has a first end and a second end in the axial direction; a valve mouth piece, which has a first end and a second end in the axial direction, the valve mouth piece is inserted into the first end of the valve body, the first end of the valve mouth piece is located in the valve body, the flow chamber is located between the valve mouth piece and the second end of the valve body, the valve port is arranged at the first end of the valve mouth piece, and the limiting structure is arranged on the valve mouth piece; the limiting sleeve has a first end and a second end, the first end of the limiting sleeve has a clamping portion, and the clamping portion and the limiting structure are used to relatively fix the limiting sleeve and the valve mouth piece.

[0015] Optionally, the outer wall of the valve mouth member has a large diameter section and a small diameter section, the small diameter section is located between the large diameter section and the first end of the valve mouth member, the large diameter section of the valve mouth member abuts against the inner circumferential wall of the valve body, an avoidance channel is formed between the small diameter section and the inner circumferential wall of the valve body, and the limiting structure is arranged on the small diameter section.

[0016] Optionally, the limiting sleeve includes: a limiting sleeve having a first end and a second end in the axial direction, the first end of the limiting sleeve facing the valve mouth member, the limiting channel being formed inside the limiting sleeve, and the flow hole being arranged on the limiting sleeve; an annular folded edge, the inner circumference of which is connected to the first end of the limiting sleeve, the annular folded edge abutting against the first end face of the first end of the valve mouth member; a positioning sleeve, the first end of which is connected to the outer circumference of the annular folded edge, the clamping portion being arranged at the second end of the positioning sleeve, and the positioning sleeve being located in the avoidance channel.

[0017] Optionally, the limiting structure is a hook or a groove formed on the outer peripheral wall of the valve mouth member, and the clamping portion is a groove or a hook matching the limiting structure.

[0018] Optionally, the valve body is an integrally formed structure.

[0019] Optionally, the valve body is integrally formed by stretching or stamping.

[0020] Optionally, the second end of the valve mouth piece is located in the valve body, and a plug-in groove for connecting with the first pipeline is provided on the second end face of the second end of the valve mouth piece, and the plug-in groove is connected to the valve port; the second end face of the second end of the valve mouth piece and the inner wall of the first end of the valve body are used to form a receiving groove for accommodating solder with the outer wall of the first pipeline.

[0021] Optionally, a guide groove is provided on the inner circumferential wall of the valve body, one end of the guide groove extends to the first end of the valve body, and the second end of the guide groove extends to the position of the limiting structure, and the guide groove is used to guide the molten solder into the flow cavity so that the valve body, the valve mouth piece and the limiting sleeve are fixedly connected by the solder.

[0022] Optionally, there are multiple guide grooves, and the multiple guide grooves are distributed at intervals in the circumferential direction.

[0023] According to a second aspect of the utility model, an air conditioner is also disclosed, comprising the one-way valve mentioned above.

[0024] The one-way valve of the utility model arranges a limiting structure in the flow chamber, and the limiting cooperation between the limiting structure and the limiting sleeve can realize the fixation of the limiting sleeve and the valve body assembly. Therefore, the process of welding the limiting sleeve separately can be omitted, thereby simplifying the assembly steps and reducing the risk of deformation of the valve port due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a one-way valve according to the first embodiment of the utility model;

[0026] Figure 2 This is a structural schematic diagram of a valve body assembly of a one-way valve according to Embodiment 1 of the present utility model;

[0027] Figure 3 This is a schematic structural diagram of a limit sleeve of a one-way valve according to Embodiment 1 of the utility model;

[0028] Figure 4 This is a schematic structural diagram of a valve body of a one-way valve according to Embodiment 2 of the present utility model;

[0029] Figure 5 This is a schematic diagram of the one-way valve and the first pipeline before welding in the second embodiment of the utility model;

[0030] Figure 6 This is a schematic diagram of the one-way valve and the first pipeline after being welded in the second embodiment of the utility model;

[0031] Figure 7 This is a schematic diagram of the structure of a one-way valve according to Embodiment 3 of the present utility model;

[0032] Figure 8 This is a schematic diagram of the structure of a one-way valve according to Embodiment 4 of the present utility model;

[0033] Fig. 9 This is a structural schematic diagram of a valve body assembly of a one-way valve according to a fourth embodiment of the present utility model;

[0034] Fig.10 This is a schematic diagram of the structure of a one-way valve according to Embodiment 5 of the present utility model;

[0035] Fig.11 This is a structural schematic diagram of a valve body assembly of a one-way valve according to a fifth embodiment of the present utility model;

[0036] List of reference numerals:

[0037] 10. Valve body assembly; 11. Flow chamber; 111. Avoidance channel; 12. Valve body; 121. Connecting port; 122. Plug-in section; 1221. Guide groove; 123. Valve core section; 124. Pipe section; 13. Valve port member; 131. Valve port; 132. First end face; 133. Large diameter section; 134. Small diameter section; 135. Second end face; 136. Annular protrusion; 137. Plug-in groove; 14. Flow chamber; 15. Valve body assembly; 16. Connecting port; 17. Plug-in section; 18. Plug-in section; 19. Plug-in section; 20. Plug-in section; 21. Plug-in section; 22. Plug-in section; 23. Plug-in section; 24. Plug-in section; 25. Plug-in section; 26. Plug-in section; 27. Plug-in section; 28. Plug-in section; 29. ​​Plug-in section; 30. Plug-in section; 31. Plug-in section; 32. Plug-in section; 33. Plug-in section; 34. Plug-in section; 35. Plug-in section; 36. Plug-in section; 37. Plug-in section; 38. Plug-in section; 39. Plug-in section; 40. Plug-in section; 41. Plug-in section; 42. Plug-in section; 43. Plug-in section; 44. Plug-in section; 45. Plug-in section; 46. Pl Flow space; 20, limiting structure; 30, limiting sleeve; 31, limiting sleeve; 311, limiting channel; 312, flow hole; 313, limiting part; 32, abutting part; 321, annular folding edge; 3211, first abutting surface; 3212, second abutting surface; 322, positioning sleeve; 34, clamping part; 40, valve core; 60, first pipeline; 70, second pipeline; 80, solder; 90, receiving groove. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the one-way valve and the air conditioner provided by the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] The air conditioning check valve is one of the important components of the air conditioner. It can control the flow direction of the refrigerant and ensure the normal operation of the system. It is an indispensable part of the air conditioning system.

[0040] In some air conditioning one-way valves, the air conditioning one-way valve usually includes: a valve body, a valve mouth part, a limit sleeve and a valve core. During the assembly process, the limit sleeve usually needs to be fixed to the valve mouth part by welding, and the valve mouth part also needs to be fixed by welding after being installed in the valve body. Therefore, at least two welding steps are required, which not only makes the assembly steps cumbersome, but also the high temperature generated by welding during the welding process is likely to cause the risk of valve mouth deformation.

[0041] In order to solve the above problems, the utility model discloses a one-way valve. The one-way valve can be used in air conditioners and can also be used in other refrigeration or heating equipment.

[0042] Taking the application in air conditioning as an example, the one-way valve can be used to connect between the first pipeline 60 and the second pipeline 70. When the refrigerant in the air conditioner flows from the first pipeline 60 to the second pipeline 70, the one-way valve opens to connect the first pipeline 60 and the second pipeline 70, and the refrigerant can flow from the first pipeline 60 to the second pipeline 70; when the refrigerant flows from the second pipeline 70 to the first pipeline 60, the one-way valve closes to cut off the first pipeline 60 and the second pipeline 70, and the refrigerant cannot flow from the second pipeline 70 to the first pipeline 60.

[0043] The one-way valve of the utility model is as follows Figures 1 to 11 As shown, the one-way valve includes: a valve body assembly 10 , a limiting sleeve 30 and a valve core 40 .

[0044] A flow chamber 11 is provided inside the valve body assembly 10, and a valve port 131 and a connecting port 121 are provided on the inner wall of the flow chamber 11. The valve port 131 is used to communicate with the first pipeline 60, and the connecting port 121 is used to communicate with the second pipeline 70. A limiting structure 20 is also provided on the inner wall of the flow chamber 11.

[0045] The limiting sleeve 30 is arranged in the flow chamber 11, and a flow space 14 is formed between the outer wall of the limiting sleeve 30 and the inner wall of the flow chamber 11. A limiting channel 311 is arranged inside the limiting sleeve 30, and the limiting channel 311 is communicated with the valve port 131. A flow hole 312 is arranged on the limiting sleeve 30, and the limiting channel 311 is communicated with the flow space 14 through the flow hole 312. The limiting sleeve 30 cooperates with the limiting structure 20 to fix the limiting sleeve 30 in the valve body assembly 10.

[0046] The valve core 40 is movably disposed in the limiting passage 311, and the valve core 40 blocks or opens the valve port 131 by moving. Specifically, the valve core 40 has a valve closing position and a valve opening position in the limiting passage 311, and the valve core 40 is movable between the valve closing position and the valve opening position. In the valve closing position, the valve core 40 blocks the valve port 131 to prevent the refrigerant in the second pipeline 70 from flowing to the first pipeline 60; in the valve opening position, the valve core 40 is separated from the valve port 131, so that the valve port 131 is opened, and the first pipeline 60 is connected with the second pipeline 70. When the refrigerant flows from the first pipeline 60 to the second pipeline 70, the valve core 40 moves from the closed valve position to the open valve position under the push of the refrigerant. At this time, the valve core 40 is separated from the valve port 131, and the first pipeline 60 and the second pipeline 70 are connected through the valve port 131. The refrigerant in the first pipeline 60 flows into the second pipeline 70 through the valve port 131 and the flow chamber 11 in turn; when the refrigerant flows from the second pipeline 70 to the first pipeline 60, the valve core 40 moves from the open valve position to the closed valve position under the action of the refrigerant. At this time, the valve core 40 blocks the valve port 131, so that the fluid in the second pipeline 70 cannot flow to the first pipeline 60.

[0047] The one-way valve of the utility model sets a limiting structure 20 in the flow chamber 11, and can fix the limiting sleeve 30 and the valve body assembly 10 through the limiting cooperation between the limiting structure 20 and the limiting sleeve 30. Therefore, the process of welding the limiting sleeve 30 separately can be omitted, thereby simplifying the assembly steps and reducing the risk of deformation of the valve port 131 due to high temperature.

[0048] The one-way valve of the present utility model is further described below in conjunction with the first embodiment.

[0049] like Figures 1 to 3As shown, in this embodiment, the valve body assembly 10 includes: a valve body 12 and a valve port member 13. The valve body 12 has a first end and a second end in the axial direction, and a limiting structure 20 is provided on the inner wall of the valve body 12. The valve port member 13 has a first end and a second end in the axial direction, and the valve port member 13 is plugged into the first end of the valve body 12, and the second end of the valve body 12 forms a connecting port 121. The first end of the valve port member 13 is located in the valve body 12 and faces the connecting port 121. The flow chamber 11 is located between the valve port member 13 and the second end of the valve body 12, and the valve port 131 is provided at the first end of the valve port member 13. The limiting sleeve 30 has an abutting portion 32 at one end close to the valve port member 13, and the abutting portion 32 abuts against the first end face 132 of the first end of the valve port member 13, and the valve port member 13 abuts the abutting portion 32 against the limiting structure 20.

[0050] During assembly, the limiting sleeve 30 can be first installed into the valve body 12 from the first end of the valve body 12, and then the valve core 40 can be installed in the limiting channel 311 of the limiting sleeve 30, and then the first end of the valve mouth piece 13 can be inserted from the first end of the valve body 12, and the first end face 132 of the first end of the valve mouth piece 13 can be abutted against the abutting portion 32, and the first end face 132 can abut the abutting portion 32 against the limiting structure 20, so as to achieve limiting cooperation, and then the valve mouth piece 13 and the valve body 12 are welded and fixed. Since the valve mouth piece 13 abuts the abutting portion 32 against the limiting structure 20, when the valve mouth piece 13 and the valve body 12 are welded and fixed, the limiting sleeve 30 is also fixed relative to the valve mouth piece 13 and the valve body 12, thereby eliminating the step of welding the limiting sleeve 30 separately, simplifying the assembly process, and improving the assembly efficiency.

[0051] like Figure 2 As shown, in this embodiment, the valve body 12 includes: a plug-in section 122, a valve core section 123 and a pipe section 124. In the direction from the first end to the second end of the valve body 12, the plug-in section 122, the valve core section 123 and the pipe section 124 are connected in sequence. The valve port 13 is plugged and matched with the plug-in section 122, the valve core 40 is located at the valve core section 123, and the connecting port 121 is arranged on the pipe section 124 so that the pipe section 124 is connected to the second pipeline 70, and a limiting structure 20 is formed at the connection between the plug-in section 122 and the valve core section 123. In this embodiment, the inner diameter of the plug-in section 122 is larger than the inner diameter of the valve core section 123, and the limiting structure 20 is a limiting step formed at the connection between the plug-in section 122 and the valve core section 123.

[0052] like Figure 2 As shown, an annular protrusion 136 is formed on the first end face 132 of the valve mouth member 13, and the valve port 131 is arranged on the annular protrusion 136. The second end of the valve mouth member 13 has a second end face 135, and a plug groove 137 for connecting to the first pipeline 60 is formed on the second end face 135, and the valve port 131 is connected to the plug groove 137.

[0053] like Figure 3As shown, the limiting sleeve 30 includes: a limiting sleeve 31 and an abutting portion 32. The limiting sleeve 31 has a first end and a second end in the axial direction. Figure 1 As shown, a limiting channel 311 is formed inside the limiting sleeve 31, and a flow hole 312 is arranged on the limiting sleeve 31; the first end of the limiting sleeve 31 is sleeved on the annular protrusion 136, and the abutment portion 32 is connected to the outer peripheral wall of the first end of the limiting sleeve 31, and the limiting sleeve 31 abuts against the first end face 132 through the abutment portion 32, and the second end of the limiting sleeve 31 forms a limiting portion 313 for limiting the valve core 40.

[0054] like Figure 1 and Figure 3 As shown, in this embodiment, the abutment portion 32 includes: an annular folded edge 321, the inner peripheral side of the annular folded edge 321 is connected to the first end of the limiting sleeve 31, the annular folded edge 321 has a first abutment surface 3211 and a second abutment surface 3212 in the axial direction, the first abutment surface 3211 abuts against the first end face 132 of the valve mouth member 13, and the outer peripheral side of the second abutment surface 3212 abuts against the step structure.

[0055] During assembly, the second end of the limiting sleeve 31 can be first installed into the valve body 12 from the first end of the valve body 12, and the annular folded edge 321 of the first end of the limiting sleeve 31 will abut against the limiting step to prevent the limiting sleeve 30 from coming out of the second end of the valve body 12, and then the valve mouth piece 13 can be installed into the valve body 12 from the first end of the valve body 12, and the first end face 132 of the valve mouth piece 13 faces the limiting sleeve 30, and the annular protrusion 136 is inserted into the limiting sleeve 30 by moving, and at the same time, the first end face 132 abuts against the first abutting surface 3211 of the annular folded edge 321 and the second abutting surface 3212 of the annular folded edge 321 abuts against the limiting step to fix it. Of course, this is not restrictive, and the first end of the limiting sleeve 31 can also be first sleeved on the annular protrusion 136, and then the limiting sleeve 30 and the valve mouth piece 13 are installed from the first end of the valve body 12 together, which is also feasible.

[0056] In the one-way valve of the present invention, since the limiting sleeve 30 is fixed by pressing the annular folded edge 321 of the limiting sleeve 30 against the limiting step through the first end face 132 of the valve mouth member 13, after the valve mouth member 13 and the valve body 12 are welded and fixed, the limiting sleeve 30 and the valve mouth member 13 and the valve body 12 are also relatively fixed. Therefore, the step of welding the limiting sleeve 30 separately is omitted, which can simplify the assembly steps, improve the assembly efficiency, and reduce the influence of the high temperature of welding on the valve mouth 131.

[0057] like Figure 2As shown, in this embodiment, the valve body 12 is an integrally formed structure, that is, the plug section 122, the valve core section 123 and the pipe section 124 are integrated. Since the valve body 12 adopts an integrally formed structure, there is no connection gap such as a weld, and the overall strength of the valve body 12 is higher. Preferably, the valve body 12 can be integrally formed by a stretching or stamping process. That is to say, the valve body 12 can be integrally formed by stamping a plate or by stretching a pipe. By adopting the above process, the wall thickness of the valve body 12 can be made more uniform, and the strength of the valve body 12 can be made more consistent.

[0058] like Figure 3 As shown, in this embodiment, the limiting sleeve 30 is an integrally formed structure, that is, the limiting sleeve 31, the annular folded edge 321 and the limiting portion 313 are integrated. Since the limiting sleeve 30 adopts an integrally formed structure, there is no connection gap such as a weld, and the overall strength of the limiting sleeve 30 is higher. In addition, by providing the annular folded edge 321, it can play a role of reinforcing the structure in the radial direction of the limiting sleeve 31 to a certain extent, preventing the limiting sleeve 31 from deforming. Preferably, the limiting sleeve 30 can be integrally formed by a stretching or stamping process.

[0059] It should be noted that, in the present embodiment, the valve body 12 is an integrally formed structure through a stretching or stamping process, but this is not restrictive. In some other embodiments not shown in the figure, the valve body 12 can also be formed by a turning process or be a split structure. Without violating the inventive concept of the present utility model, the above situations all fall within the protection scope of the present utility model.

[0060] like Figure 1 and Figure 2 As shown, the second end of the valve member 13 is located in the valve body 12. After the first pipeline 60 is plugged in, the second end face 135 of the valve member 13, the inner wall of the first end of the valve body 12 and the outer wall of the first pipeline 60 form a receiving groove 90 for receiving the solder 80. When the first pipeline 60 is installed in the plug-in groove 137, the outer wall of the first pipeline 60, the second end face 135 of the valve member 13 and the inner peripheral wall of the valve body 12 near the first end form a receiving groove 90 for receiving the solder 80. In the process of welding the first pipeline 60 to the one-way valve, the solder 80 can contact the first pipeline 60, the valve member 13 and the valve body 12 at the same time after melting, so that the first pipeline 60, the valve member 13 and the valve body 12 are welded and fixed at one time, and the sealing between the first pipeline 60 and the valve member 13, and the sealing between the valve member 13 and the valve body 12 is completed, thereby improving the assembly efficiency. In addition, by providing the receiving groove 90, the contact area between the solder 80 and the first pipeline 60, the valve port member 13, and the valve body 12 is increased, thereby improving the sealing and reliability of the connection.

[0061] It should be noted that, in the present embodiment, the second end of the valve member 13 is located inside the valve body 12, that is, the valve member 13 is entirely located inside the valve body 12, but this is not restrictive, and in some other embodiments not shown in the figure, the valve member 13 may also be partially located inside the valve body 12, that is, the first end is located inside the valve body 12, and the second end is located outside the valve body 12. Under the premise of not violating the inventive concept of the present utility model, the above situations all belong to the protection scope of the present utility model.

[0062] like Figures 4 to 6 The second embodiment of the utility model shown in the figure also discloses a one-way valve, and its structure is basically the same as that of the first embodiment, except that, in the present embodiment, a guide groove 1221 is provided on the inner peripheral wall of the valve body 12, one end of the guide groove 1221 extends to the first end of the valve body 12, and the second end of the guide groove 1221 extends to the position of the limiting structure 20, and the guide groove 1221 is used to guide the molten solder 80 into the flow cavity 11, so that the valve body 12, the limiting sleeve 30 and the valve mouth piece 13 are fixedly connected by the solder 80. By providing the guide groove 1221, in the process of welding the first pipeline 60 to the one-way valve, the solder 80 can enter the position of the abutment portion 32 of the flow cavity 11 along the guide groove 1221 after melting, so that after the solder 80 is cooled, the abutment portion 32 can be connected and fixed to the valve mouth piece 13, and the abutment portion 32 can be connected and fixed to the valve body 12.

[0063] like Figure 4 As shown, there are multiple guide grooves 1221, and the multiple guide grooves 1221 are distributed on the inner peripheral wall of the plug-in section 122 at intervals in the circumferential direction. Figure 5 As shown, when the valve member 13 is inserted into the plug section 122, the outer peripheral wall of the valve member 13 abuts against the inner peripheral wall of the plug section 122, and the plurality of guide grooves 1221 cooperate with the outer peripheral wall of the valve member 13 to form a plurality of guide channels, one end of each guide channel is connected to the receiving groove 90, and the other end is located at the abutment portion 32, as shown in FIG. Figure 6 As shown, in the process of welding the first pipeline 60 and the one-way valve, after the solder 80 melts in the receiving groove 90, it can enter the position of the abutment portion 32 along the guide channel. After the solder 80 cools, the abutment portion 32 and the valve port member 13, and the abutment portion 32 and the valve body 12 can be connected and fixed. At the same time, by providing the receiving groove 90, the contact area between the solder 80 and the valve body 12 and the valve port member 13 is increased, and the reliability of the connection is improved.

[0064] like Figure 7The third embodiment of the utility model shown also discloses a one-way valve, and its structure is basically the same as that of the first embodiment, except that, in the present embodiment, the limiting structure 20 is a limiting protrusion formed inside the valve body 12 by the outer peripheral wall of the valve body 12 being recessed inward. By pressing the outer peripheral wall of the valve body 12 toward the inside of the valve body 12, the outer peripheral wall of the valve body 12 is recessed inward and a limiting protrusion is formed inside the valve body 12, thereby forming the limiting structure 20. In this way, the inner diameter of the valve core section 123 can be equal to or greater than the inner diameter of the plug section 122, so that the flow space of the refrigerant can be larger and the flow resistance of the refrigerant can be reduced.

[0065] like Figures 8 to 9 The fourth embodiment of the utility model shown in the figure also discloses a one-way valve, and its structure is basically the same as that of the first embodiment, except that, in the present embodiment, the abutting portion 32 includes: an annular folded edge 321 and a positioning sleeve 322. The inner peripheral side of the annular folded edge 321 is connected to the first end of the limiting sleeve 31, and the annular folded edge 321 has a first abutting surface 3211 and a second abutting surface 3212 in the axial direction, the first abutting surface 3211 abuts against the valve mouth member 13, and the outer peripheral side of the second abutting surface 3212 abuts against the limiting structure 20. The positioning sleeve 322 is connected to the outer peripheral side of the annular folded edge 321, and the outer peripheral wall of the positioning sleeve 322 abuts against the inner peripheral wall of the valve body 12. By providing the positioning sleeve 322, radial positioning can be achieved by abutting the outer peripheral wall of the positioning sleeve 322 against the inner peripheral wall of the plug-in section 122 of the valve body 12 to prevent the limiting sleeve 30 from shaking radially.

[0066] like Fig. 9 As shown, the outer wall of the valve member 13 has a large diameter section 133 and a small diameter section 134, the small diameter section 134 is located between the large diameter section 133 and the first end of the valve member 13, the large diameter section 133 of the valve member 13 abuts against the inner peripheral wall of the valve body 12, and the small diameter section 134 and the inner peripheral wall of the valve body 12 form an avoidance channel 111, as shown in FIG. Figure 8 As shown, the positioning sleeve 322 is located in the avoidance channel 111. In this embodiment, the outer peripheral wall of the small diameter section 134, the first end face 132, the outer peripheral wall of the annular protrusion 136 and the inner peripheral wall of the valve body 12 form a flow chamber 11, that is, the avoidance channel 111 is also a part of the flow chamber 11. By providing the avoidance channel 111, the positioning sleeve 322 can be located between the outer peripheral wall of the valve port member 13 and the inner peripheral wall of the valve body 12, so as to better achieve the limit fit and improve the reliability of the limit.

[0067] like Fig.10 and Fig.11The fifth embodiment of the utility model shown in the figure also discloses a one-way valve, and its structure is basically the same as that of the first embodiment, except that, in the present embodiment, the valve body assembly 10 comprises: a valve body 12 and a valve port member 13. The valve body 12 has a first end and a second end in the axial direction; the valve port member 13 has a first end and a second end in the axial direction, the valve port member 13 is plugged into the first end of the valve body 12, the first end of the valve port member 13 is located in the valve body 12, the flow chamber 11 is located between the valve port member 13 and the second end of the valve body 12, the valve port 131 is arranged at the first end of the valve port member 13, and the limiting structure 20 is arranged on the valve port member 13; the limiting sleeve 30 has a first end and a second end, the first end of the limiting sleeve 30 has a clamping portion 34, and the clamping portion 34 and the limiting structure 20 are used to fix the limiting sleeve 30 and the valve port member 13 relatively.

[0068] During assembly, the limit sleeve 30 is engaged and limited with the limit structure 20 on the valve mouth piece 13 through the clamping portion 34, so that the limit sleeve 30 and the valve mouth piece 13 are fixedly connected. After the valve mouth piece 13 and the valve body 12 are welded and fixed, the limit sleeve 30 is also fixed relative to the valve mouth piece 13 and the valve body 12, thereby eliminating the step of separately welding the limit sleeve 30, simplifying the assembly process and improving the assembly efficiency.

[0069] like Fig.11 As shown, the outer wall of the valve member 13 has a large diameter section 133 and a small diameter section 134 in the axial direction, the small diameter section 134 is located between the large diameter section 133 and the first end of the valve member 13, the large diameter section 133 of the valve member 13 abuts against the inner peripheral wall of the valve body 12, and an avoidance channel 111 is formed between the small diameter section 134 and the inner peripheral wall of the valve body 12, and the limiting structure 20 is arranged on the small diameter section 134. It can be understood that in this embodiment, the outer peripheral wall of the small diameter section 134, the first end face 132, the outer peripheral wall of the annular protrusion 136 and the inner peripheral wall of the valve body 12 form a flow chamber 11, and the outer wall of the small diameter section 134 of the valve member 13 is a part of the inner wall of the flow chamber 11.

[0070] like Fig.10 As shown, the limiting sleeve 30 includes: a limiting sleeve 31, an annular folded edge 321, a positioning sleeve 322 and a clamping portion 34. The limiting sleeve 31 has a first end and a second end in the axial direction. A limiting channel 311 is formed inside the limiting sleeve 31, and a flow hole 312 is arranged on the limiting sleeve 31; the first end of the limiting sleeve 31 is sleeved on the annular protrusion 136, and the inner peripheral side of the annular folded edge 321 is connected to the first end of the limiting sleeve 31, and the annular folded edge 321 abuts against the first end face 132 of the first end of the valve mouth member 13; the first end of the positioning sleeve 322 is connected to the outer peripheral side of the annular folded edge 321, and the clamping portion 34 is arranged at the second end of the positioning sleeve 322, and the positioning sleeve 322 is located in the avoidance channel 111.

[0071] In this embodiment, the limiting structure 20 is a groove formed on the outer peripheral wall of the small diameter section 134 of the valve port member 13, and the clamping portion 34 is a hook formed on the inner peripheral side of the second end of the positioning sleeve 322, and the hook matches the groove. Fig.11 As shown, after the valve port member 13 and the limiting sleeve 30 are assembled, the hook and the groove are engaged with each other, thereby achieving a fixed connection between the valve port member 13 and the limiting sleeve 30 .

[0072] It should be noted that in this embodiment, the limiting structure 20 is a card slot, and the clamping portion 34 is a hook, but this is not restrictive. In some other embodiments not shown in the figure, the limiting structure 20 can be a hook, and the clamping portion 34 can be a card slot. Under the premise of not violating the inventive concept of the utility model, the above situations all belong to the protection scope of the utility model.

[0073] According to a second aspect of the utility model, an air conditioner is also disclosed, comprising the one-way valve mentioned above.

[0074] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A one-way valve, used to connect between a first pipeline (60) and a second pipeline (70), characterized in that: The one-way valve comprises: A valve body assembly (10) is provided with a flow chamber (11) therein, a valve port (131) and a connection port (121) are provided on the inner wall of the flow chamber (11), the valve port (131) is used to communicate with the first pipeline (60), the connection port (121) is used to communicate with the second pipeline (70), and a limit structure (20) is also provided on the inner wall of the flow chamber (11); A limiting sleeve (30) is arranged in the flow cavity (11), a flow space (14) is formed between the outer wall of the limiting sleeve (30) and the inner wall of the flow cavity (11), a limiting channel (311) is arranged inside the limiting sleeve (30), the limiting channel (311) is communicated with the valve port (131), a flow hole (312) is arranged on the limiting sleeve (30), the limiting channel (311) is communicated with the flow space (14) through the flow hole (312), and the limiting sleeve (30) cooperates with the limiting structure (20) to fix the limiting sleeve (30) in the valve body assembly (10); The valve core (40) is movably arranged in the limiting channel (311), and the valve core (40) blocks or opens the valve port (131) by moving.

2. The one-way valve according to claim 1, characterized in that: The valve body assembly (10) comprises: A valve body (12) having a first end and a second end in the axial direction, wherein the limiting structure (20) is arranged on the inner wall of the valve body (12); A valve port member (13) having a first end and a second end in the axial direction, the valve port member (13) being inserted into the first end of the valve body (12), the first end of the valve port member (13) being located in the valve body (12), the flow chamber (11) being located between the valve port member (13) and the second end of the valve body (12), and the valve port (131) being arranged at the first end of the valve port member (13); The limiting sleeve (30) has an abutment portion (32) at one end close to the valve mouth member (13), and the abutment portion (32) abuts against a first end surface (132) of a first end of the valve mouth member (13), and the valve mouth member (13) presses the abutment portion (32) against the limiting structure (20).

3. The one-way valve according to claim 2, characterized in that: The valve body (12) comprises: a plug-in section (122) and a valve core section (123) which are connected in sequence, the valve mouth piece (13) is plug-fitted with the plug-in section (122), the valve core (40) is located in the valve core section (123), and the limiting structure (20) is formed at the connection between the plug-in section (122) and the valve core section (123).

4. The one-way valve according to claim 3, characterized in that: The inner diameter of the plug-in section (122) is greater than the inner diameter of the valve core section (123), and the limiting structure (20) is a limiting step formed at the connection between the plug-in section (122) and the valve core section (123).

5. The one-way valve according to claim 3, characterized in that: The limiting structure (20) is a limiting protrusion formed inwardly by the outer peripheral wall of the valve body (12) and formed inside the valve body (12).

6. The one-way valve according to claim 2, characterized in that: The limiting sleeve (30) comprises: The limiting sleeve (31) has a first end and a second end in the axial direction, the limiting channel (311) is formed inside the limiting sleeve (31), and the flow hole (312) is arranged on the limiting sleeve (31); the abutment portion (32) is connected to the outer peripheral wall of the first end of the limiting sleeve (31), and the limiting sleeve (31) abuts against the first end surface (132) through the abutment portion (32).

7. The one-way valve according to claim 6, characterized in that: The abutment portion (32) comprises: An annular folded edge (321), the inner circumference of which is connected to the first end of the limiting sleeve (31), and the annular folded edge (321) has a first abutting surface (3211) and a second abutting surface (3212) in the axial direction, the first abutting surface (3211) abuts against the valve mouth member (13), and the outer circumference of the second abutting surface (3212) abuts against the limiting structure (20).

8. The one-way valve according to claim 7, characterized in that: The abutment portion (32) further comprises: A positioning sleeve (322) is connected to the outer peripheral side of the annular folded edge (321), and the outer peripheral wall of the positioning sleeve (322) abuts against the inner peripheral wall of the valve body (12).

9. The one-way valve according to claim 8, characterized in that: The outer wall of the valve mouth member (13) has a large diameter section (133) and a small diameter section (134); the small diameter section (134) is located between the large diameter section (133) and the first end of the valve mouth member (13); the large diameter section (133) of the valve mouth member (13) abuts against the inner circumferential wall of the valve body (12); an avoidance channel (111) is formed between the small diameter section (134) and the inner circumferential wall of the valve body (12); and the positioning sleeve (322) is located in the avoidance channel (111).

10. The one-way valve according to claim 1, characterized in that: The valve body assembly (10) comprises: A valve body (12) having a first end and a second end in the axial direction; A valve port member (13) having a first end and a second end in the axial direction, the valve port member (13) being inserted into the first end of the valve body (12), the first end of the valve port member (13) being located in the valve body (12), the flow chamber (11) being located between the valve port member (13) and the second end of the valve body (12), the valve port (131) being arranged at the first end of the valve port member (13), and the limiting structure (20) being arranged on the valve port member (13); The limiting sleeve (30) has a first end and a second end. The first end of the limiting sleeve (30) has a clamping portion (34). The clamping portion (34) and the limiting structure (20) are connected to relatively fix the limiting sleeve (30) and the valve port member (13).

11. The one-way valve according to claim 10, characterized in that: The outer wall of the valve mouth member (13) has a large diameter section (133) and a small diameter section (134); the small diameter section (134) is located between the large diameter section (133) and the first end of the valve mouth member (13); the large diameter section (133) of the valve mouth member (13) abuts against the inner circumferential wall of the valve body (12); an avoidance channel (111) is formed between the small diameter section (134) and the inner circumferential wall of the valve body (12); and the limiting structure (20) is arranged on the small diameter section (134).

12. The one-way valve according to claim 11, characterized in that: The limiting sleeve (30) comprises: A limiting sleeve (31) having a first end and a second end in the axial direction, the first end of the limiting sleeve (31) faces the valve port member (13), the limiting channel (311) is formed inside the limiting sleeve (31), and the flow hole (312) is arranged on the limiting sleeve (31); An annular folded edge (321), the inner circumference of which is connected to the first end of the limiting sleeve (31), and the annular folded edge (321) abuts against the first end surface (132) of the first end of the valve port member (13); A positioning sleeve (322) has a first end connected to the outer peripheral side of the annular folded edge (321), the clamping portion (34) is arranged at the second end of the positioning sleeve (322), and the positioning sleeve (322) is located in the avoidance channel (111).

13. The one-way valve according to claim 12, characterized in that: The limiting structure (20) is a hook or a groove formed on the outer peripheral wall of the valve port member (13), and the clamping portion (34) is a groove or a hook that matches the limiting structure (20).

14. The one-way valve according to claim 2 or 10, characterized in that: The valve body (12) is an integrally formed structure.

15. The one-way valve according to claim 14, characterized in that: The valve body (12) is integrally formed by stretching or stamping.

16. The one-way valve according to claim 2 or 10, characterized in that: The second end of the valve port member (13) is located in the valve body (12); a second end surface (135) of the second end of the valve port member (13) is provided with a plug-in groove (137) for plugging with the first pipeline (60); the plug-in groove (137) is communicated with the valve port (131); The second end surface (135) of the second end of the valve mouth member (13) and the inner wall of the first end of the valve body (12) are used to form a receiving groove (90) for receiving the solder (80) together with the outer wall of the first pipeline (60).

17. The one-way valve according to claim 16, characterized in that: A guide groove (1221) is provided on the inner peripheral wall of the valve body (12), one end of the guide groove (1221) extends to the first end of the valve body (12), and the second end of the guide groove (1221) extends to the position of the limiting structure (20), and the guide groove (1221) is used to guide the molten solder (80) to enter the flow chamber (11), so that the valve body (12), the valve mouth member (13) and the limiting sleeve (30) are fixedly connected through the solder (80).

18. The one-way valve according to claim 17, characterized in that: There are a plurality of guide grooves (1221), and the plurality of guide grooves (1221) are distributed at intervals in the circumferential direction.

19. An air conditioner, characterized in that: A one-way valve comprising the one-way valve according to any one of claims 1 to 18.

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