Air conditioner one-way valve and air conditioning unit

Abstract

The air conditioner one-way valve comprises a valve body, a valve port piece and a valve element, the valve body is of an integrally-formed structure, the valve body is provided with a first end and a second end, and the valve body is provided with an overflowing channel penetrating from the first end to the second end of the valve body; the first end of the valve body is connected with the valve port piece, the valve element is located in the overflowing channel and used for being matched with the valve port piece so as to achieve connection or disconnection between the first pipeline and the second pipeline, and the range of the ratio of the minimum value of the wall thickness of the valve body to the maximum value of the wall thickness of the valve body is 0.75-1. According to the one-way valve of the air conditioner, the minimum value of the wall thickness of the valve body and the maximum value of the wall thickness are limited within 25%, so that the overall wall thickness of the valve body is close, compared with the prior art, materials which are not evenly distributed originally are distributed more evenly, the position where the wall thickness of the valve body is small originally can be thicker, and under the limited materials, the cost is reduced. The upper limit of refrigerant pressure borne by the whole valve body is improved, and the reliability of the air conditioner one-way valve is improved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning, and in particular to an air conditioning one-way valve and an air conditioning unit. 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 existing air conditioning one-way valves, such as Figure 1 As shown, the valve body 1 is usually cylindrical, and a through-flow passage 2 is generally machined along the axis inside the valve body 1. The through-flow passage 2 includes a valve core section 3 and a pipe section 4. The valve core section 3 is used to install the valve port and the valve core, and the pipe section 4 is used to connect the pipeline. Usually, the inner diameter of the channel valve core section 3 is larger than the inner diameter of the pipe section 4, resulting in the wall thickness of the pipe section 4 being much larger than the wall thickness of the valve body 1 at the valve core section 3. Therefore, the pipe section 4 can withstand a greater refrigerant pressure.

[0004] However, when the air conditioning one-way valve is working, the maximum refrigerant pressure that the valve body 1 can withstand as a whole is determined by the position with the smallest wall thickness. Therefore, since the wall thickness at different positions of the valve body 1 is different, the upper limit of the maximum refrigerant pressure that the valve body 1 can withstand is reduced. Utility Model Content

[0005] The utility model aims to at least solve the problem in the prior art that the wall thickness of the one-way valve at different positions of the valve body is different, thereby reducing the upper limit of the maximum refrigerant pressure that the valve body as a whole can withstand, and proposes an air conditioning one-way valve and an air conditioning unit.

[0006] In order to achieve the purpose of the utility model, an air-conditioning one-way valve is provided, which is used to be connected between a first pipeline and a second pipeline. The air-conditioning one-way valve comprises: a valve body, a valve mouth piece and a valve core. The valve body is an integrally formed structure. The valve body has a first end and a second end. The valve body has a flow passage extending from the first end to the second end. The first end of the valve body is connected to the valve mouth piece, and the valve mouth piece is used to connect to the first pipeline. The second end of the valve body is used to connect to the second pipeline. The valve core is located in the flow passage and is used to cooperate with the valve mouth piece to achieve conduction or cutoff between the first pipeline and the second pipeline. The ratio of the minimum wall thickness of the valve body to the maximum wall thickness of the valve body is in the range of 0.75-1.

[0007] Furthermore, the ratio of the minimum value of the valve body wall thickness to the maximum value of the valve body wall thickness is in the range of 0.85-1.

[0008] Further, the valve body includes: a main body portion, which has a first end and a second end in the axial direction, a first channel extending from the first end to the second end is arranged inside the main body portion, the valve mouth piece is connected to the first end of the main body portion, and the valve core is located in the first channel; a connecting pipe portion, which has a first end and a second end in the axial direction, a second channel extending axially is arranged inside the connecting pipe portion, the second end of the connecting pipe portion is used to be connected to the second pipeline, and the outer diameter of the connecting pipe portion is smaller than the outer diameter of the main body portion; a connecting portion, which is connected between the second end of the main body portion and the first end of the connecting pipe portion, and the first channel is connected to the second channel through the connecting portion.

[0009] Furthermore, the connecting portion is trumpet-shaped, having a large diameter end and a small diameter end along the axial direction, the large diameter end of the connecting portion is connected to the second end of the main body portion, and the small diameter end of the connecting portion is connected to the first end of the connecting portion; the connecting portion has a guide channel inside, and the first channel, the guide channel and the second channel are connected in sequence to form the flow channel.

[0010] Furthermore, the connecting portion is cylindrical, the interior of the second channel is used for plugging the second pipeline, and a limiting portion is provided on the inner wall of the connecting portion, and the limiting portion is used to cooperate with the plug-in end of the second pipeline to limit the position of the plug-in end of the second pipeline.

[0011] Furthermore, the limiting portion is a limiting protrusion that is recessed inwardly by the outer peripheral wall of the connecting pipe portion and is formed inside the second channel.

[0012] Furthermore, the limiting protrusion is an annular structure arranged along the circumference of the connecting pipe portion.

[0013] Furthermore, the height of the limiting protrusion protruding from the inner wall surface of the second channel is equal to the wall thickness of the second pipeline.

[0014] Furthermore, the second end of the connecting pipe portion is provided with an outer flange.

[0015] Furthermore, the connecting portion is cylindrical and is used to be inserted into the inside of the second pipeline. The connecting portion forms a limiting fit with the plug-in end of the second pipeline, and an annular groove for arranging solder is formed between the outer peripheral wall of the connecting portion and the plug-in end of the second pipeline.

[0016] Further, the valve mouth piece axially has a first end and a second end, the end face of the first end of the valve mouth piece is provided with a plug interface for connecting with the first pipeline, the second end of the valve mouth piece is provided with a valve port that cooperates with the valve core, and the plug interface is connected with the valve port; the valve mouth piece is arranged in the valve body, and the end face of the first end of the valve mouth piece, the inner wall of the first end of the valve body and the outer wall of the first pipeline form a receiving groove for receiving solder.

[0017] Furthermore, the valve body is integrally formed by stretching or stamping.

[0018] According to a second aspect of the utility model, an air-conditioning unit is also disclosed, comprising the above-mentioned air-conditioning one-way valve.

[0019] The air-conditioning non-return valve of the utility model limits the minimum wall thickness of the valve body and the maximum wall thickness to within 25%, thereby making the overall wall thickness of the valve body closer. Compared with the prior art, the originally unevenly distributed material is relatively more evenly distributed, which is equivalent to allocating a part of the material at the thicker wall position on the original valve body to the smaller wall thickness position of the original valve body, so that the smaller wall position of the original valve body can become thicker. With limited materials, the upper limit of the refrigerant pressure that the valve body as a whole can withstand is increased, thereby improving the reliability of the air-conditioning non-return valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a valve body of an air conditioning one-way valve in the prior art;

[0021] Figure 2 This is a structural schematic diagram of an air conditioning one-way valve according to Embodiment 1 of the utility model;

[0022] Figure 3 This is a structural schematic diagram of a valve body of an air conditioning one-way valve according to Embodiment 1 of the utility model;

[0023] Figure 4 for Figure 2 A partial enlarged view of part A;

[0024] Figure 5 This is a structural schematic diagram of an air conditioning one-way valve according to Embodiment 2 of the present utility model;

[0025] Figure 6 This is a schematic structural diagram of an air conditioning one-way valve according to Embodiment 3 of the present utility model;

[0026] Figure 7 This is a schematic diagram of an application scenario of the air conditioning one-way valve of the third embodiment of the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of an air conditioning one-way valve according to Embodiment 4 of the present utility model;

[0028] List of reference numerals:

[0029] 10. Valve body; 11. Main body; 111. Flow space; 12. Connecting pipe; 121. Limiting part; 122. Outer flange; 13. Connecting part; 14. Flow channel; 141. First channel; 142. Second channel; 143. Flow guide channel; 20. Valve mouth piece; 21. End face; 22. Plug-in interface; 23. Valve mouth; 24. Annular protrusion; 30. Valve core; 31. Closed end; 32. Open end; 40. Limiting sleeve; 41. Stopper; 42. Limiting channel; 43. Flow hole; 50. First pipeline; 60. Second pipeline; 61. Plug-in end; 62. Main body section; 63. Plug-in section; 70. Annular groove; 80. Solder; 90. Accommodating groove. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the air conditioning one-way valve and the air conditioning unit provided by the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] 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.

[0032] In some existing air conditioning one-way valves, such as Figure 1 As shown, the valve body 1 is usually cylindrical, and a through-flow passage 2 is generally machined along the axis inside the valve body 1. The through-flow passage 2 includes a valve core section 3 and a pipe section 4. The valve core section 3 is used to install the valve port and the valve core, and the pipe section 4 is used to connect the pipeline. Usually, the inner diameter D1 of the channel valve core section 3 is larger than the inner diameter D2 of the pipe section 4, resulting in the wall thickness h2 of the pipe section 4 being much larger than the wall thickness h1 of the valve body 1 at the valve core section 3. Therefore, the pipe section 4 can withstand a greater refrigerant pressure.

[0033] However, when the air conditioning one-way valve is working, the maximum refrigerant pressure that the valve body 1 can withstand as a whole is determined by the position of the smallest wall thickness. That is to say, since the wall thickness h2 of the valve core section 3 is relatively small, the upper limit of the pressure it can withstand is smaller than the upper limit of the pressure of the connecting pipe section 4. Since the valve core section 3 and the connecting pipe section 4 are connected, if the pipe wall of the valve core section 3 ruptures, the refrigerant in the entire flow channel 2 will flow out from the rupture. Therefore, the maximum refrigerant pressure that the valve core section 3 can withstand determines the upper limit of the refrigerant pressure that the entire valve body 1 can withstand.

[0034] Therefore, for the valve body of the air-conditioning one-way valve, the material used to manufacture each valve body is limited. If the thickness of the connecting pipe section 4 is thicker, more material will be concentrated in the connecting pipe section 4, which will inevitably lead to less material in the valve core section 3, resulting in a smaller wall thickness of the valve core section 3, thereby reducing the upper limit of the maximum refrigerant pressure that the valve body 1 can withstand.

[0035] In order to solve the above-mentioned problem, the utility model discloses an air-conditioning one-way valve, which is used to be connected between a first pipeline 50 and a second pipeline 60. When the refrigerant flows from the first pipeline 50 to the second pipeline 60, the air-conditioning one-way valve opens to connect the first pipeline 50 and the second pipeline 60, and the refrigerant can flow from the first pipeline 50 to the second pipeline 60; when the refrigerant flows from the second pipeline 60 to the first pipeline 50, the air-conditioning one-way valve is closed to cut off the first pipeline 50 and the second pipeline 60, and the refrigerant cannot flow from the second pipeline 60 to the first pipeline 50.

[0036] Specifically, if Figure 2 In the first embodiment of the utility model shown, the air conditioning one-way valve includes: a valve body 10 , a valve port member 20 and a valve core 30 .

[0037] The valve body 10 is an integrally formed structure, the valve body 10 has a first end and a second end, the valve body 10 has a flow passage 14 extending from the first end to the second end, the first end of the valve body 10 is connected to the valve mouth piece 20, the valve mouth piece 20 is used to connect to the first pipeline 50, the second end of the valve body 10 is used to connect to the second pipeline 60, the valve core 30 is located in the flow passage 14 and is used to cooperate with the valve mouth piece 20 to achieve conduction or cutoff between the first pipeline 50 and the second pipeline 60, and the ratio of the minimum value of the wall thickness of the valve body 10 to the maximum value of the wall thickness of the valve body 10 is in the range of 0.75-1. The ratio of the minimum value of the wall thickness of the valve body 10 to the maximum value of the wall thickness of the valve body 10 of the air conditioning one-way valve of the utility model is in the range of 0.75-1 (including the end point value), that is, the difference between the minimum value of the wall thickness of the valve body 10 and the maximum value of the wall thickness is within 25%, and the thickness of the valve body 10 is generally uniform.

[0038] The air-conditioning one-way valve of the present invention limits the minimum and maximum wall thicknesses of the valve body 10 to within 25%, thereby making the overall wall thickness of the valve body 10 closer. Compared with the prior art, the originally unevenly distributed material is relatively more evenly distributed, which is equivalent to allocating a part of the material at the thicker wall position on the original valve body 10 to the thinner wall position of the original valve body 10, so that the thinner wall position of the original valve body 10 can become thicker. With limited materials, the upper limit of the refrigerant pressure that the valve body 10 as a whole can withstand is increased, thereby improving the reliability of the air-conditioning one-way valve.

[0039] In addition, from another perspective, if the valve body 10 is guaranteed to withstand the upper limit of the refrigerant pressure as a whole, the material used in the originally thicker position can be reduced by setting the wall thickness of the valve body 10 more uniformly. In other words, since the upper limit of the refrigerant pressure that the valve body 10 as a whole can withstand is determined by the position where the wall thickness of the valve body 10 is the smallest, ensuring that the valve body 10 as a whole can withstand the upper limit of the refrigerant pressure is to ensure that the minimum thickness of the valve body 10 remains unchanged. Therefore, by setting the wall thickness of the valve body 10 more uniformly, it is equivalent to reducing the material used in the originally thicker position, making the position where the wall thickness is originally larger thinner, thereby reducing the material cost.

[0040] like Figure 3 As shown, the valve body 10 includes: a main body 11, a connecting portion 12 and a connecting portion 13. The main body 11 is columnar, and has a first end and a second end in the axial direction. A first passage 141 is provided inside the main body 11, which runs from the first end to the second end. The valve port 20 is connected to the first end of the main body 11, and the valve core 30 is located in the first passage 141; the connecting portion 12 is columnar, and has a first end and a second end in the axial direction. A second passage 142 is provided inside the connecting portion 12, and the second end of the connecting portion 12 is used to connect with the second pipeline 60. The outer diameter of the connecting portion 12 is smaller than the outer diameter of the main body 11; the connecting portion 13 is connected between the second end of the main body 11 and the first end of the connecting portion 12, and the first passage 141 is connected to the second passage 142 through the connecting portion 13.

[0041] It can be understood that, in this embodiment, Figure 2 As shown, the valve port member 20 has a first end and a second end in the axial direction, and an insertion port 22 for plugging with the first pipeline 50 is provided on the end surface 21 of the first end of the valve port member 20, and an annular protrusion 24 is provided on the second end of the valve port member 20, and a valve port 23 is formed inside the annular protrusion 24, and the insertion port 22 is communicated with the valve port 23. The second end of the valve port member 20 is inserted into the first end of the main body 11 and fixedly connected to the main body 11 by welding.

[0042] A limiting sleeve 40 is arranged in the main body 11, one end of the limiting sleeve 40 is sleeved on the annular protrusion 24, and the other end has a stopper 41. A limiting channel 42 is arranged inside the limiting sleeve 40, and the valve core 30 is movably arranged in the limiting channel 42. A flow space 111 is formed between the outer peripheral wall of the limiting sleeve 40 and the inner peripheral wall of the first channel 141, and a flow hole 43 connecting the limiting channel 42 and the flow space 111 is arranged on the outer peripheral wall of the limiting sleeve 40.

[0043] In this embodiment, the valve core 30 is made of metal and has a cup-shaped hollow structure with a wall thickness of 0.1 to 1 mm. The valve core 30 has a closed end 31 and an open end 32. The closed end 31 of the valve core 30 is used to block the valve port 23, and the open end 32 of the valve core 30 faces the stopper 41. The valve core 30 with this structure can not only move better under the action of the refrigerant to achieve the one-way flow limiting function, but also the open end 32 of the valve core 30 is more conducive to interacting with the refrigerant, so that the refrigerant can more easily push the valve core 30, thereby improving the reliability of the one-way valve.

[0044] When the refrigerant flows from the first pipeline 50 to the second pipeline 60, the refrigerant pushes the valve core 30 to Figure 2 The air conditioning one-way valve is opened by moving the valve core 30 to the right side, so that the outer wall of the closed end 31 of the valve core 30 is separated from the side wall of the valve port 23, and the open end 32 of the valve core 30 is limited by the stopper 41, so that the air conditioning one-way valve is opened, and the valve port 23 is connected with the flow space 111 through the limit channel 42 and the flow hole 43, so that the first pipeline 50 and the second pipeline 60 are connected, and the refrigerant can flow from the first pipeline 50 to the second pipeline 60; when the refrigerant flows from the second pipeline 60 to the first pipeline 50, the refrigerant pushes the valve core 30 to Figure 2 The air conditioning one-way valve is closed, and the first pipeline 50 and the second pipeline 60 are cut off, so that the refrigerant cannot flow from the second pipeline 60 to the first pipeline 50.

[0045] In this embodiment, the valve body 10 formed by the main body 11, the connecting part 13 and the connecting part 12 is formed by stamping a plate or drawing a tube. By adopting the above process, the ratio of the minimum wall thickness of the valve body 10 to the maximum wall thickness of the valve body 10 can be controlled within a range of 0.85-1, so that the wall thickness of the valve body 10 is more uniform, thereby further improving the upper limit of the overall strength of the valve body 10. Figure 4As shown, the wall thickness of the main body 11 is D3, the wall thickness of the connecting portion 12 is D4, and the wall thickness of the connecting portion 13 is D5. The ratio of the minimum value among D3, D4, and D5 to the maximum value among D3, D4, and D5 can be between 0.75 and 1 (including the endpoint values), and the preferred ratio range can be between 0.85 and 1 (including the endpoint values). In this embodiment, the wall thickness range of the valve body 10 is 0.1-2.5 mm. It should be noted that the wall thickness range of the valve body 10 refers to the wall thickness of the valve body 10 preset according to actual needs (for example, pipeline pressure, pipeline size, etc.) when the valve body 10 is produced. For example: D3=0.1mm, D4=0.119mm, D5=0.125mm; or, D3=0.1mm, D4=0.117mm, D5=0.123mm; or, D3=0.1mm, D4=0.109mm, D5=0.115mm; or, D3=0.1mm, D4=0.106mm, D5=0.112mm; or, D3=1mm, D4=0.95mm, D5=1.05mm; or, D3=2.5mm, D4=2.3mm, D5=2.25mm; or, D3=1.875mm, D4=2.3mm, D5=2.5mm; or, D3=2.3mm, D4=2.4mm, D5=2.5mm.

[0046] like Figure 2 and Figure 3 As shown, in this embodiment, the connection part 13 is trumpet-shaped, and has a large diameter end and a small diameter end in the axial direction. The large diameter end of the connection part 13 is connected to the second end of the main body 11, and the small diameter end of the connection part 13 is connected to the first end of the connecting pipe part 12; the connection part 13 has a guide channel 143 inside, and the first channel 141, the guide channel 143 and the second channel 142 are connected in sequence to form the flow channel 14. By setting the connection part 13 to be trumpet-shaped and forming the guide channel 143 inside the connection part 13, the turbulence caused by the change in diameter is reduced during the flow of the refrigerant from the first pipeline 50 to the second pipeline 60, and the flow resistance of the refrigerant is reduced.

[0047] The connecting portion 12 is cylindrical, and the second channel 142 is used to plug the second pipeline 60. A limiting portion 121 is provided on the inner wall of the connecting portion 12. The limiting portion 121 is used to limit the position of the plug-in end 61 of the second pipeline 60 so as to limit the position of the plug-in end 61 of the second pipeline 60. The plug-in position of the second pipeline 60 can be limited by providing the limiting portion 121. During assembly, the plug-in end 61 of the second pipeline 60 is directly abutted against the limiting portion 121 to achieve limiting and positioning, thereby preventing the second pipeline 60 from being inserted too deeply and colliding with the valve core 30, thereby affecting the function of the valve core 30. At the same time, it can also prevent the second pipeline 60 from being inserted too shallowly, thereby reducing the reliability of the connection between the second pipeline 60 and the valve body 10.

[0048] The limiting portion 121 is a limiting protrusion formed by the outer peripheral wall of the connecting pipe 12 being recessed inward and formed inside the second channel 142. By pressing the outer peripheral wall of the connecting pipe inward, the outer peripheral wall of the connecting pipe 12 is recessed inward and a limiting protrusion is formed inside the second channel 142, so that a limiting fit can be formed for the plug end 61 of the second pipe 60. In this embodiment, the limiting protrusion is an annular structure arranged along the circumference of the connecting pipe 12.

[0049] It can be understood that the height of the limiting protrusion of the annular structure protruding from the inner wall of the second channel 142 is equal to the wall thickness of the second pipeline 60. Since the second pipeline 60 is plugged into the inside of the connecting pipe 12, the inner diameter of the connecting pipe 12 matches the outer diameter of the second pipeline 60. If the height of the limiting protrusion of the annular structure protruding from the inner wall of the second channel 142 exceeds the wall thickness of the second pipeline 60, the flow area at the position of the limiting protrusion will be too small than the inner diameter of the second pipeline 60, thereby affecting the flow of the refrigerant. By making the height of the limiting protrusion protruding from the inner wall of the second channel 142 equal to the wall thickness of the second pipeline 60, the flow area at the position of the limiting protrusion is consistent with the inner diameter of the second pipeline 60, which is more conducive to the flow of the refrigerant.

[0050] like Figure 2 As shown, in this embodiment, the limiting protrusion is an annular structure arranged along the circumference of the connecting pipe portion 12. However, this is not restrictive. Figure 5 In the second embodiment shown, its structure is the same as that of the first embodiment, the only difference is that the limiting protrusion is a convex point, and the convex point can be one or multiple circumferentially spaced convex points. In other words, as long as the structure can achieve limiting cooperation with the plug-in end 61 of the second pipeline 60, it is within the protection scope of the present utility model.

[0051] like Figure 2 As shown, the second end of the connecting pipe 12 is provided with an outer flange 122. During assembly, after the second pipeline 60 is plugged into the connecting pipe 12, the solder 80 can be placed on the outer flange 122. During welding, the contact area between the connecting pipe 12 and the solder 80 can be increased, thereby improving the sealing and reliability of welding.

[0052] It should be noted that in this embodiment, the solder 80 is a solder ring, but this is not restrictive. In some other embodiments not shown in the figure, the solder 80 can also be solder paste, which can be applied to the welding position, such as the outer flange 122 or the groove, to facilitate subsequent welding.

[0053] It should be noted that, in the above embodiments, the second pipeline 60 is plugged into the inside of the connecting pipe portion 12, but this is not restrictive.

[0054] like Figure 6The third embodiment of the utility model shown also discloses an air conditioning one-way valve, and its structure is basically the same as that of the first embodiment. The difference is that in this embodiment, the connecting pipe portion 12 is cylindrical and is used to be inserted into the inside of the second pipeline 60.

[0055] In order to enable the connecting portion 12 to be inserted into the interior of the second pipeline 60, the outer diameter of the connecting portion 12 matches the inner diameter of the second pipeline 60. Figure 6 As shown, the small diameter end of the connecting portion 13 is connected to the first end of the connecting portion 12. When the plug end 61 of the second pipeline 60 moves to the connecting position of the connecting portion 13 and the connecting pipe, the outer diameter of the connecting portion 13 gradually increases, and the outer diameter of the connecting portion 13 is greater than the inner diameter of the second pipeline 60, so that the connecting portion 13 and the plug end 61 of the second pipeline 60 can be limited to match to limit the position of the plug end 61 of the second pipeline 60. At the same time, since the outer peripheral wall of the connecting portion 13 is inclined, an annular groove 70 for arranging a solder 80 (not shown in the figure) is formed between the outer peripheral wall of the connecting portion 13 and the plug end 61 of the second pipeline 60. In this embodiment, the connecting portion 13 can not only guide the flow through the inner peripheral wall, but also limit the position through the outer peripheral wall, and the outer peripheral wall of the connecting portion 13 can also form an annular groove 70 with the plug end 61 of the second pipeline 60, so as to increase the contact area with the solder 80 and improve the sealing and reliability of the connection.

[0056] It should be noted that in Figure 7 In an application scenario of the third embodiment shown, the second pipeline 60 may include: a main body section 62 and an insert section 63, the inner diameter of the insert section 63 is larger than the inner diameter of the main body section 62, and a limit step is formed at the connection between the main body section 62 and the insert section 63, and the limit step can be used to cooperate with the second end limit of the connecting pipe part 12 to form a limit.

[0057] In the above embodiment, the gap between the valve mouth member 20 and the valve body 10 and the gap between the valve mouth member 20 and the first pipeline 50 need to be fixed and sealed by welding respectively, and the steps are relatively complicated.

[0058] In order to solve the above problems, Figure 8 The fourth embodiment of the utility model shown in the figure also discloses a one-way valve, whose structure is basically the same as that of the first embodiment, and the valve mouth member 20 axially has a first end and a second end, and the end face 21 of the first end of the valve mouth member 20 is provided with a plug-in port 22 for plugging with the first pipeline 50, and the second end of the valve mouth member 20 is provided with an annular protrusion 24, and a valve port 23 is formed inside the annular protrusion 24, and the plug-in port 22 is connected to the valve port 23; the difference is that, in the present embodiment, the valve mouth member 20 is arranged in the main body 11 of the valve body 10, and the end face 21 of the first end of the valve mouth member 20, the inner wall of the first end of the main body 11 and the outer wall of the first pipeline 50 form a receiving groove 90 for receiving the solder 80.

[0059] Combination Figure 8 It can be seen that in this embodiment, the outer peripheral wall of the valve mouth member 20 abuts against the inner peripheral wall of the main body 11, and there is an end distance between the end face 21 of the first end of the valve mouth member 20 and the opening of the first end of the main body 11 in the axial direction. Therefore, when the first pipeline 50 is inserted into the plug-in port 22, the end face 21 of the first end of the valve mouth member 20, the inner wall of the first end of the main body 11 and the outer wall of the first pipeline 50 can form a receiving groove 90 for receiving the solder 80. By forming the receiving groove 90, during the welding process, the solder 80 can be melted and the first pipeline 50, the valve mouth member 20, and the valve body 10 can be welded and fixed at the same time, and the gap between the first pipeline 50 and the valve mouth member 20, and the gap between the valve mouth member 20 and the valve body 10 can be welded and sealed at one time, eliminating one welding process, making the assembly process simpler and more efficient, saving solder, and reducing production costs. In addition, since the valve body 10 adopts an integral molding structure, there is no gap on the surface, which improves the sealing performance and overall strength of the one-way valve surface.

[0060] According to another aspect of the utility model, an air conditioning unit is also disclosed, comprising the above-mentioned air conditioning one-way valve.

[0061] 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. An air conditioning one-way valve, used to be connected between a first pipeline (50) and a second pipeline (60), the air conditioning one-way valve comprising: The valve body (10), the valve port member (20) and the valve core (30) are characterized in that: The valve body (10) is an integrally formed structure, the valve body (10) has a first end and a second end, and the valve body (10) has a flow passage (14) extending from the first end to the second end; The first end of the valve body (10) is connected to the valve mouth piece (20), and the valve mouth piece (20) is used to connect to the first pipeline (50). The second end of the valve body (10) is used to connect to the second pipeline (60). The valve core (30) is located in the flow channel (14) and is used to cooperate with the valve mouth piece (20) to achieve conduction or disconnection between the first pipeline (50) and the second pipeline (60). The ratio of the minimum wall thickness of the valve body (10) to the maximum wall thickness of the valve body (10) is in the range of 0.75-1.

2. The air conditioning one-way valve according to claim 1, characterized in that: The ratio of the minimum value of the wall thickness of the valve body (10) to the maximum value of the wall thickness of the valve body (10) is in the range of 0.85-1.

3. The air conditioning one-way valve according to claim 1, characterized in that: The valve body (10) comprises: A main body (11) having a first end and a second end in the axial direction, a first passage (141) penetrating from the first end to the second end is provided inside the main body (11), the valve port member (20) is connected to the first end of the main body (11), and the valve core (30) is located in the first passage (141); A connecting pipe portion (12) having a first end and a second end in the axial direction, a second passage (142) penetrating axially is arranged inside the connecting pipe portion (12), the second end of the connecting pipe portion (12) is used to be connected to the second pipeline (60), and the outer diameter of the connecting pipe portion (12) is smaller than the outer diameter of the main body portion (11); A connecting portion (13) is connected between the second end of the main body portion (11) and the first end of the connecting portion (12); the first channel (141) and the second channel (142) are connected via the connecting portion (13).

4. The air conditioning one-way valve according to claim 3, characterized in that: The connecting portion (13) is trumpet-shaped and has a large-diameter end and a small-diameter end along the axial direction; the large-diameter end of the connecting portion (13) is connected to the second end of the main body portion (11), and the small-diameter end of the connecting portion (13) is connected to the first end of the connecting pipe portion (12); The connecting portion (13) has a flow guide channel (143) inside, and the first channel (141), the flow guide channel (143) and the second channel (142) are connected in sequence to form the flow passage (14).

5. The air conditioning one-way valve according to claim 3 or 4, characterized in that: The connecting pipe portion (12) is cylindrical, the interior of the second channel (142) is used for plugging the second pipeline (60), and a limiting portion (121) is provided on the inner wall of the connecting pipe portion (12), and the limiting portion (121) is used to cooperate with the plug-in end of the second pipeline (60) to limit the position of the plug-in end of the second pipeline (60).

6. The air conditioning one-way valve according to claim 5, characterized in that: The limiting portion (121) is a limiting protrusion that is recessed inwardly from the outer peripheral wall of the connecting pipe portion (12) and is formed inside the second channel (142).

7. The air conditioning one-way valve according to claim 6, characterized in that: The limiting protrusion is an annular structure arranged along the circumference of the connecting pipe portion (12).

8. The air conditioning one-way valve according to claim 7, characterized in that: The height of the limiting protrusion protruding from the inner wall surface of the second channel (142) is equal to the wall thickness of the second pipeline (60).

9. The air conditioning one-way valve according to claim 5, characterized in that: The second end of the connecting pipe portion (12) is provided with an outer flange (122).

10. The air conditioning one-way valve according to claim 4, characterized in that: The connecting portion (12) is cylindrical and is used to be plugged into the inside of the second pipeline (60); the connecting portion (13) forms a limit fit with the plug-in end (61) of the second pipeline (60); and an annular groove (70) for arranging solder (80) is formed between the outer peripheral wall of the connecting portion (13) and the plug-in end (61) of the second pipeline (60).

11. The air conditioning one-way valve according to claim 1, characterized in that: The valve port member (20) has a first end and a second end in the axial direction, an insertion port (22) for plugging with the first pipeline (50) is provided on the end surface (21) of the first end of the valve port member (20), a valve port (23) matching with the valve core (30) is provided on the second end of the valve port member (20), and the insertion port (22) is in communication with the valve port (23); The valve mouth piece (20) is arranged in the valve body (10), and the end surface (21) of the first end of the valve mouth piece (20), the inner wall of the first end of the valve body (10) and the outer wall of the first pipeline (50) form a receiving groove (90) for receiving the solder (80).

12. The air conditioning one-way valve according to claim 1, characterized in that: The valve body (10) is integrally formed by stretching or stamping.

13. An air conditioning unit, characterized in that: An air conditioning one-way valve comprising the one-way valve according to any one of claims 1 to 12.

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