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, and the inner wall of the overflowing cavity is provided with a valve port; the limiting sleeve is arranged in the overflowing cavity, a limiting channel is formed in the limiting sleeve, and the limiting channel communicates with the valve port; the valve element is arranged in the limiting channel, an inner cavity is formed in the valve element, a first opening communicated with the inner cavity is formed in the end, facing the valve port, of the valve element, and the valve element is configured to move between a valve closing position and a valve opening position; in the valve closing position, the first opening of the valve element is arranged at the valve port in a sleeving mode so as to block the valve port. And at the valve opening position, the valve core is separated from the valve port. The valve element of the one-way valve is provided with the first opening, due to the existence of the inner cavity, the weight of the valve element is reduced, the valve opening resistance is reduced, the inner cavity can enable fluid to be concentrated and not prone to dispersion, the fluid can push the valve element away from the valve port more easily, and the low-pressure valve opening capacity of the valve element is improved.

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 the prior art air conditioner, the valve core of the one-way valve is generally made of non-metallic materials (such as plastic), while the valve seat of the one-way valve and the external pipe are generally made of metal. When the valve seat of the one-way valve is welded to the external pipe, the heat generated by the welding will be transferred to the valve core due to the good thermal conductivity of metal, so that the temperature of the valve core increases, while the valve core made of plastic material often cannot withstand the welding temperature, causing the valve core to melt due to the heat, and the one-way valve fails.

[0004] In order to prevent the valve core from melting due to heat, a wet towel is usually used to wrap the external pipe during welding to remove some of the heat through evaporation of water, thereby reducing the heat transferred to the valve core. However, despite this, there is still a risk that the valve core will be affected by high temperature.

[0005] In some related technologies, a metal valve core is used to replace a plastic valve core to avoid high temperature melting. However, the metal valve core is heavier than the plastic valve core, so the refrigerant in the pipeline needs to have a greater pressure to push the valve core, which results in the existing valve core having poor low-pressure valve opening capability. Utility Model Content

[0006] The utility model aims to at least solve the problem in the prior art that the valve core has a large mass, resulting in a poor ability of the valve core to open the valve at low pressure, and proposes a one-way valve and an air conditioner.

[0007] 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, a flow chamber is arranged inside the valve body, a valve port and a connecting port are arranged on the inner wall of the flow chamber, the valve port is used to communicate with the first pipeline, and the connecting port is used to communicate with the second pipeline; a limit sleeve is arranged in the flow chamber, a flow space is formed between the outer wall of the limit sleeve and the inner wall of the flow chamber, a limit channel is arranged inside the limit sleeve, the limit channel is communicated with the valve port, and a flow hole is arranged on the limit sleeve. The limiting passage is connected with the flow space through the flow hole; a valve core is arranged in the limiting passage, an inner cavity is arranged inside the valve core, and one end of the valve core facing the valve port has a first opening connected with the inner cavity, and the valve core is configured to be movable between a closed valve position and an open valve position; in the closed valve position, the first opening of the valve core is sleeved at the valve port position, and the inner cavity is connected with the valve port to block the valve port; in the open valve position, the valve core is separated from the valve port so that the valve port is connected with the flow hole through the limiting passage.

[0008] Optionally, the valve body assembly includes: a valve body, which has a first end and a second end in the axial direction and a passage running axially therethrough, the second end of the valve body forming the connecting port; a valve port member, including: a main body and an annular protrusion, the main body being plugged into the first end of the valve body, the main body having a first end and a second end in the axial direction, the first end of the main body having a first end face, the first end face facing the second end of the valve body, the flow chamber being located between the main body and the second end of the valve body; the second end of the main body having a second end face, the second end face being provided with a plug-in groove for plugging and cooperating with the first pipeline; the annular protrusion having a first end and a second end in the axial direction, the second end of the annular protrusion being connected to the first end face of the main body, the valve port running through from the first end of the annular protrusion to the second end and being connected to the plug-in groove, and in the valve closing position, the first opening of the valve core is sleeved on the first end of the annular protrusion to seal the valve port.

[0009] Optionally, the annular protrusion has a positioning section and an insertion section in the axial direction, the outer diameter of the positioning section is larger than the outer diameter of the insertion section, the positioning section is close to the second end of the annular protrusion and connected to the main body, and the insertion section is close to the first end of the annular protrusion and connected to the positioning section; one end of the limiting sleeve is sleeved on the positioning section of the annular protrusion, and the inner circumferential wall of the limiting channel and the outer circumferential wall of the insertion section form an annular matching groove, and in the valve closing position, the circumferential side wall of the first opening of the valve core is located in the matching groove, and the insertion section is plug-fitted with the valve core.

[0010] Optionally, the valve core is a hollow cup-shaped structure having a first end and a second end in the axial direction, the first opening is arranged at the first end of the valve core, the second end of the valve core is a closed end, and an avoidance groove is arranged on the outer peripheral wall of the first opening.

[0011] Optionally, a sealing structure is provided on the inner peripheral wall of the first opening of the valve core, and in the valve closing position, the first end of the annular protrusion abuts against the sealing structure to achieve sealing of the valve port.

[0012] Optionally, the blocking structure is a blocking surface formed on an inner peripheral wall of a first opening of the valve core, and a distance between the blocking surface and an axis of the valve core gradually decreases in a direction from a first end to a second end of the valve core.

[0013] Optionally, the blocking structure is a limiting protrusion formed on the inner peripheral wall of the valve core.

[0014] Optionally, the one-way valve further comprises: a positioning sleeve, which is sleeved on the second end of the valve core and is used for limiting cooperation with the limiting sleeve.

[0015] Optionally, the valve body assembly has a limiting structure, and the limiting sleeve cooperates with the limiting structure to fix the limiting sleeve in the valve body assembly.

[0016] Optionally, the limiting structure is provided on the inner wall of the valve body, and the limiting sleeve has an abutment portion at one end close to the valve mouth member, the abutment portion abuts against the first end face of the valve mouth member, and the valve mouth member presses the abutment portion against the limiting structure.

[0017] Optionally, the limiting sleeve has a first end and a second end in the axial direction, the first end of the limiting sleeve is sleeved on the annular protrusion, and the abutting portion is an annular folded edge formed on the outer peripheral wall of the first end of the limiting sleeve.

[0018] Optionally, the limiting structure is provided on the main body, the limiting sleeve has a first end and a second end in the axial direction, the first end of the limiting sleeve has a clamping portion, and the clamping portion is clamped and matched with the limiting structure to relatively fix the limiting sleeve and the valve mouth member.

[0019] Optionally, the second end surface of the main body is located in the valve body, and the second end surface and the inner wall of the first end of the valve body are used to form a receiving groove for receiving solder with the outer wall of the first pipeline.

[0020] Optionally, the valve body is an integrally formed structure, and / or the valve core is an integrally formed structure.

[0021] According to a second aspect of the utility model, an air conditioner is also disclosed, comprising the one-way valve mentioned above.

[0022] The valve core of the one-way valve of the utility model has a first opening. When the valve core is in the valve closing position, the valve port can be blocked. Due to the existence of the inner cavity, the weight of the valve core is reduced, the valve opening resistance is reduced, and the inner cavity can concentrate the fluid and is not easy to disperse. The fluid can more easily push the valve core away from the valve port, thereby improving the valve core's ability to open the valve at low pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a one-way valve according to the first embodiment of the utility model;

[0024] 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;

[0025] 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;

[0026] Figure 4 This is a schematic structural diagram of a valve core of a one-way valve according to Embodiment 1 of the present utility model;

[0027] Figure 5 This is a schematic structural diagram of a valve core of a one-way valve according to a second embodiment of the present utility model;

[0028] Figure 6 This is a schematic structural diagram of a valve core of a one-way valve according to Embodiment 3 of the present utility model;

[0029] Figure 7 This is a schematic diagram of the structure of a one-way valve according to Embodiment 4 of the present utility model;

[0030] Figure 8 This is a schematic diagram of the structure of a one-way valve according to Embodiment 5 of the present utility model;

[0031] Fig. 9 This is a structural schematic diagram of a valve core assembly of a one-way valve according to a fifth embodiment of the present utility model;

[0032] Fig.10 This is a schematic diagram of the structure of a one-way valve according to Embodiment 6 of the present utility model;

[0033] List of reference numerals:

[0034] 10. Valve body assembly; 11. Valve body; 111. Plug-in section; 112. Valve core section; 113. Pipe section; 1131. Connecting port; 12. Valve port member; 121. Main body; 1211. First end face; 1212. Second end face; 1213. Plug-in groove; 1214. Large diameter section; 1215. Small diameter section; 122. Annular protrusion; 1221. Valve port; 1222. Positioning section; 1223. Insertion section; 13. Flow chamber; 20 , limiting sleeve; 21, limiting channel; 22, flow hole; 23, limiting part; 24, abutting part; 25, clamping part; 251, limiting sleeve; 252, hook; 30, valve core; 31 first opening; 311, avoidance groove; 312, blocking structure; 32, closed end; 33, abutting protrusion; 34, inner cavity; 40, limiting structure; 50, positioning sleeve; 60, first pipeline; 70, second pipeline; 80, accommodating groove; 90, matching groove. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] In the prior art air conditioner, the valve core of the one-way valve is generally made of non-metallic materials (such as plastic), while the valve seat of the one-way valve and the external pipe are generally made of metal. When the valve seat of the one-way valve is welded to the external pipe, the heat generated by the welding will be transferred to the valve core due to the good thermal conductivity of metal, so that the temperature of the valve core increases, while the valve core made of plastic material often cannot withstand the welding temperature, causing the valve core to melt due to the heat, and the one-way valve fails.

[0038] In order to prevent the valve core from melting due to heat, a wet towel is usually used to wrap the external pipe during welding to remove some of the heat through evaporation of water, thereby reducing the heat transferred to the valve core. However, despite this, there is still a risk that the valve core will be affected by high temperature.

[0039] In some related technologies, a metal valve core is used to replace a plastic valve core to avoid high temperature melting. However, the metal valve core is heavier than the plastic valve core, so the refrigerant in the pipeline needs to have a greater pressure to push the valve core, which results in the existing valve core having poor low-pressure valve opening capability.

[0040] In addition, 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 during the welding process, the high temperature generated by welding 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 3 As shown in the figure, the one-way valve includes: a valve body assembly 10, a limiting sleeve 20 and a valve core 30.

[0044] Please combine Figure 1 and Figure 2 A flow chamber 13 is provided inside the valve body assembly 10 , and a valve port 1221 and a connecting port 1131 are provided on the inner wall of the flow chamber 13 . The valve port 1221 is used to communicate with the first pipeline 60 , and the connecting port 1131 is used to communicate with the second pipeline 70 .

[0045] like Figure 1 and Figure 3 As shown, the limit sleeve 20 is arranged in the channel, and a flow space is formed between the outer wall of the limit sleeve 20 and the inner wall of the channel. A limit channel 21 is arranged inside the limit sleeve 20, and the limit channel 21 is connected with the valve port 1221. A flow hole 22 is arranged on the limit sleeve 20, and the limit channel 21 is connected with the flow space through the flow hole 22.

[0046] The valve core 30 is movably disposed in the limiting passage 21, and the valve core 30 can open or close the valve port 1221 by moving. Specifically, an inner cavity 34 is disposed inside the valve core 30, and one end of the valve core 30 facing the valve port 1221 has a first opening 31 connected to the inner cavity 34, and the valve core 30 is configured to be movable between a closed valve position and an open valve position; in the closed valve position, the first opening 31 of the valve core 30 is sleeved at the position of the valve port 1221, and the inner cavity 34 is connected to the valve port 1221 to block the valve port 1221 and prevent the refrigerant in the second pipeline 70 from flowing to the first pipeline 60; in the open valve position, the valve core 30 is separated from the valve port 1221, so that the valve port 1221 is connected to the flow hole 22 through the limiting passage 21, thereby connecting the first pipeline 60 to the second pipeline 70.

[0047] When the refrigerant flows from the first pipeline 60 to the second pipeline 70, the valve core 30 moves from the closed valve position to the open valve position under the push of the refrigerant. At this time, the valve core 30 is in the open valve position, the first pipeline 60 and the second pipeline 70 are connected through the valve port 1221, and the refrigerant in the first pipeline 60 flows into the second pipeline 70 through the valve port 1221 and the flow chamber 13 in turn; when the refrigerant flows from the second pipeline 70 to the first pipeline 60, the valve core 30 moves from the open valve position to the closed valve position under the action of the refrigerant. At this time, the valve core 30 is in the closed valve position, thereby blocking the valve port 1221, so that the fluid in the second pipeline 70 cannot flow to the first pipeline 60.

[0048] The valve core 30 of the one-way valve of the utility model is provided with a first opening 31. When the valve core 30 is in the valve closing position, the valve port 1221 can be blocked. At the same time, due to the existence of the inner cavity 34, the weight of the valve core 30 is reduced, the valve opening resistance is reduced, and the inner cavity 34 can concentrate the refrigerant and is not easy to disperse. The refrigerant can more easily push the valve core 30 away from the valve port 1221, thereby improving the low-pressure valve opening ability of the valve core 30.

[0049] Furthermore, for easy installation, a limiting structure 40 is provided on the inner wall of the flow chamber 13 of the valve body assembly 10 , and the limiting sleeve 20 cooperates with the limiting structure 40 to fix the limiting sleeve 20 in the valve body assembly 10 .

[0050] The one-way valve of the utility model sets a limiting structure 40 in the flow chamber 13, and the limiting structure 40 cooperates with the limiting sleeve 20 to fix the limiting sleeve 20 and the valve body assembly 10. Therefore, the process of welding the limiting sleeve 20 separately can be omitted, thereby simplifying the assembly steps and reducing the risk of deformation of the valve port 1221 due to high temperature.

[0051] The one-way valve of the present utility model is further described below in conjunction with the first embodiment.

[0052] like Figures 1 to 3As shown, the valve body assembly 10 comprises: a valve body 11 and a valve port member 12. The valve body 11 has a first end and a second end in the axial direction and an axially penetrating passage, and the second end of the valve body 11 forms a connecting port 1131.

[0053] like Figure 1 and Figure 2 As shown, the valve port member 12 includes a body portion 121 and an annular protrusion 122. Figure 2 As shown, the main body 121 is plugged into the first end of the valve body 11, and the main body 121 has a first end and a second end in the axial direction. The first end of the main body 121 has a first end face 1211, and the first end face 1211 faces the second end of the valve body 11, that is, the connecting port 1131, and the flow chamber 13 is located between the main body 121 and the second end of the valve body 11; the second end of the main body 121 has a second end face 1212, and the second end face 1212 is provided with a plug-in groove 1213 for plugging and matching with the first pipeline 60; the annular protrusion 122 has a first end and a second end in the axial direction, and the second end of the annular protrusion 122 is connected to the first end face 1211 of the main body 121, and the valve port 1221 runs through the first end of the annular protrusion 122 to the second end and is connected to the plug-in groove 1213. In the closed valve position, as shown in FIG. Figure 1 As shown, the first opening 31 of the valve core 30 is sleeved on the first end of the annular protrusion 122, and the inner cavity 34 is communicated with the valve port 1221 to block the valve port 1221. It should be noted that in this embodiment, the valve port member 12 is integrally formed.

[0054] In the first embodiment, the valve mouth member 12 is provided with an annular protrusion 122 on the first end face 1211, and the annular protrusion 122 can cooperate with the first opening 31 of the valve core 30, and the first opening 31 is sleeved on the annular protrusion 122, so that the valve port 1221 can be blocked; the valve mouth member 12 is provided with a plug-in groove 1213 on the second end face 1212 of the main body 121, and the plug-in groove 1213 can be plug-fitted with the first pipeline 60, so that when the valve is opened, the first pipeline 60, the valve port 1221 and the second pipeline 70 are connected.

[0055] In this embodiment, if Figure 2 As shown, the annular protrusion 122 has a positioning section 1222 and an insertion section 1223 in the axial direction. The outer diameter of the positioning section 1222 is greater than the outer diameter of the insertion section 1223. The positioning section 1222 is close to the second end of the annular protrusion 122 and connected to the main body 121, and the insertion section 1223 is close to the first end of the annular protrusion 122 and connected to the positioning section 1222; Figure 1As shown, one end of the limit sleeve 20 is sleeved on the positioning section 1222 of the annular protrusion 122, and the inner circumferential wall of the limit channel 21 and the outer circumferential wall of the insertion section 1223 form an annular matching groove 90. In the closed valve position, the circumferential side wall of the first opening 31 of the valve core 30 is located in the matching groove 90, and the insertion section 1223 is plugged into and matched with the valve core 30.

[0056] The one-way valve of the utility model is provided with a positioning section 1222 and an insertion section 1223 on the annular protrusion 122. The limiting sleeve 20 can be sleeved on the annular protrusion 122 through the positioning section 1222 to achieve positioning matching. The insertion section 1223 cooperates with the inner circumferential wall of the limiting channel 21 to form a matching groove 90, so that when the valve core 30 is in the valve closing position, the circumferential side wall of the first opening 31 can enter the matching groove 90 and be sleeved on the outer circumferential wall of the insertion section 1223. At the same time, a labyrinth sealing structure is formed between the inner wall of the matching groove 90 and the outer circumferential wall of the valve core 30, thereby improving the sealing effect of the valve core 30.

[0057] In this embodiment, the valve core 30 is a hollow cup-shaped structure, which has a first end and a second end in the axial direction, the first opening 31 is arranged at the first end of the valve core 30, and the second end of the valve core 30 is a closed end 32. Specifically, the valve core 30 can be made of metal and formed by stretching or cutting process, so that the wall thickness of the valve core 30 can reach 0.1-1 mm. The opening of the hollow cup-shaped structure is the first opening 31 of the valve core 30. The valve core 30 with such a structure can not only move better under the action of the fluid to achieve the effect of one-way flow restriction, but also the first opening 31 end of the valve core 30 is more conducive to the interaction with the refrigerant, so that the refrigerant can more easily push the valve core 30 to leave the closed valve position, thereby improving the low-pressure opening ability of the one-way valve. In addition, since the valve core 30 is a hollow cup-shaped structure, the first opening 31 has a certain elasticity, so that when the first opening 31 cooperates with the insertion section 1223 of the annular protrusion 122, the shape of the annular protrusion 122 can be matched by radial deformation, thereby improving the blocking effect.

[0058] In addition, when used in air conditioners, the one-way valve is usually set in the pipeline of the refrigerant compression cycle to control the flow direction of the refrigerant. In the refrigerant compression cycle, the gaseous refrigerant is compressed into liquid refrigerant by the compressor. During the operation of the compressor, the internal lubricating oil will enter the refrigerant and flow in the pipeline with the refrigerant. In some pipelines arranged in the vertical direction, a one-way valve will also be installed. In some cases, the opening direction of the one-way valve will be upward, that is, the first pipeline 60 is arranged below the one-way valve, and the second pipeline 70 is arranged above the one-way valve. In some related technologies, although the valve core 30 is also a hollow cup-shaped structure, the opening is away from the valve port. Therefore, after being arranged vertically according to the above situation, the opening of the valve core is facing upward, which will cause the lubricating oil with a density higher than the refrigerant to be deposited inside the valve core 30, thereby increasing the weight of the valve core, thereby affecting the ability to open the valve at low pressure.

[0059] In the one-way valve of the present invention, the first end of the valve core 30 is provided with a first opening 31, and the second end is a closed end 32. Therefore, the first opening 31 is downward, and the lubricating oil will leave the interior of the valve core 30 under the action of gravity and will not accumulate in the valve core 30, thereby ensuring the low-pressure opening capability of the one-way valve.

[0060] It should be noted that if Figure 4 As shown, in the first embodiment, a blocking structure 312 is provided on the inner peripheral wall of the first opening 31 of the valve core 30. In the valve closing position, the first end of the annular protrusion 122 abuts against the blocking structure 312 to achieve the blocking of the valve port 1221. By providing the blocking structure 312, the insertion section 1223 of the annular protrusion 122 can be abutted against the blocking structure 312, thereby improving the blocking effect.

[0061] In this embodiment, if Figure 4 As shown, the blocking structure 312 is a blocking surface formed on the inner peripheral wall of the first opening 31 of the valve core 30, and the distance between the blocking surface and the axis of the valve core 30 gradually decreases in the direction away from the first opening 31 inside the valve core 30. By setting the blocking surface and gradually reducing the distance between the blocking surface and the axis of the valve core 30 in the direction away from the first opening 31 inside the valve core 30, a shrinking structure that gradually shrinks from the first end to the second end of the valve core 30 can be formed. Therefore, when the insertion section 1223 of the annular protrusion 122 abuts against the blocking surface, the blocking surface can guide the insertion section 1223 of the annular protrusion 122 to better plug and match through the shrinking structure, thereby achieving effective blocking. In addition, Figure 4 It can be seen that in the direction from the second end to the first end of the valve core 30, the wall thickness of the first opening 31 becomes smaller and smaller, so it is easier to deform the structure of the first opening 31 to better match the contour of the insertion section 1223 of the annular protrusion 122.

[0062] like Figures 1 to 3As shown, in this embodiment, a limiting structure 40 is provided on the inner wall of the valve body 11, and the limiting sleeve 20 has an abutment portion 24 at one end close to the valve mouth member 12, the abutment portion 24 abuts against the first end face 1211 of the valve mouth member 12, and the valve mouth member 12 presses the abutment portion 24 against the limiting structure 40.

[0063] During assembly, the limiting sleeve 20 can be first installed into the valve body 11 from the first end of the valve body 11, and then the valve core 30 can be installed in the limiting channel 21 of the limiting sleeve 20, and then the valve mouth piece 12 can be inserted from the first end of the valve body 11, and the first end face 1211 of the first end of the main body 121 can be abutted against the abutting portion 24, and the first end face 1211 can abut the abutting portion 24 against the limiting structure 40, so as to achieve limiting cooperation, and then the valve mouth piece 12 and the valve body 11 are welded and fixed. Since the valve mouth piece 12 abuts the abutting portion 24 against the limiting structure 40, when the valve mouth piece 12 and the valve body 11 are welded and fixed, the limiting sleeve 20 is also fixed relative to the valve mouth piece 12 and the valve body 11, thereby eliminating the step of welding the limiting sleeve 20 separately, simplifying the assembly process, and improving the assembly efficiency.

[0064] like Figure 2 As shown, in this embodiment, the valve body 11 includes: a plug-in section 111, a valve core section 112 and a pipe section 113. In the direction from the first end to the second end of the valve body 11, the plug-in section 111, the valve core section 112 and the pipe section 113 are connected in sequence. The valve mouth member 12 is plugged and matched with the plug-in section 111, the valve core 30 is located at the valve core section 112, and the connecting port 1131 is provided on the pipe section 113 so that the pipe section 113 is connected to the second pipeline 70, and a limiting structure 40 is formed at the connection between the plug-in section 111 and the valve core section 112. In this embodiment, the inner diameter of the plug-in section 111 is larger than the inner diameter of the valve core section 112, and the limiting structure 40 is a limiting step formed at the connection between the plug-in section 111 and the valve core section 112.

[0065] like Figure 2 and Figure 3 As shown, the limit sleeve 20 axially has a first end and a second end, the first end of the limit sleeve 20 is sleeved on the annular protrusion 122, the abutment portion 24 is an annular folded edge formed on the outer peripheral wall of the first end of the limit sleeve 20, the limit sleeve 20 abuts against the first end face 1211 through the abutment portion 24, and the second end of the limit sleeve 20 forms a limit portion 23 for limiting the valve core 30.

[0066] During assembly, the second end of the limiting sleeve 20 can be first installed into the valve body 11 from the first end of the valve body 11, and the annular folded edge of the first end of the limiting sleeve 20 will abut against the limiting step to prevent the limiting sleeve 20 from escaping from the second end of the valve body 11. Then, the valve mouth piece 12 can be installed into the valve body 11 from the first end of the valve body 11, and the first end face 1211 of the main body 121 faces the limiting sleeve 20. The annular protrusion 122 is inserted into the limiting sleeve 20 by moving, and the first end face 1211 abuts against the annular folded edge and the annular folded edge is fixed against the limiting step. Of course, this is not restrictive, and the first end of the limiting sleeve 20 can also be first sleeved on the annular protrusion 122, and then the limiting sleeve 20 and the valve mouth piece 12 are installed from the first end of the valve body 11 together, which is also feasible.

[0067] In the one-way valve of the present invention, since the limiting sleeve 20 is fixed by pressing the annular folded edge of the limiting sleeve 20 against the limiting step through the first end face 1211 of the valve mouth member 12, after the second end face 1212 of the valve mouth member 12 is welded and fixed to the first end of the valve body 11, the limiting sleeve 20 and the valve mouth member 12 and the valve body 11 are also relatively fixed, eliminating the step of welding the limiting sleeve 20 separately, which can simplify the assembly steps, improve the assembly efficiency, and reduce the influence of the high temperature of welding on the valve mouth 1221.

[0068] like Figure 2 As shown, in this embodiment, the valve body 11 is an integrally formed structure, that is, the plug section 111, the valve core section 112 and the pipe section 113 are integrated. Since the valve body 11 adopts an integrally formed structure, there is no connection gap such as a weld, and the overall strength of the valve body 11 is higher. Preferably, the valve body 11 can be integrally formed by a stretching or stamping process. That is to say, the valve body 11 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 11 can be made more uniform, and the strength of the valve body 11 can be made more consistent.

[0069] like Figure 3 As shown, in this embodiment, the limiting sleeve 20 is an integrally formed structure, that is, the limiting sleeve 20 and the annular folding edge are integrated. Since the limiting sleeve 20 adopts an integrally formed structure, there is no connection gap such as a weld, and the overall strength of the limiting sleeve 20 is higher. In addition, by providing the annular folding edge, it can play a role of reinforcing the structure in the radial direction of the limiting sleeve 20 to a certain extent, preventing the limiting sleeve 20 from deforming. Preferably, the limiting sleeve 20 can be integrally formed by a stretching or stamping process.

[0070] It should be noted that, in the present embodiment, the valve body 11 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 11 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.

[0071] like Figure 1 and Figure 2 As shown, the second end face 1212 of the main body 121 is located in the valve body 11. After the first pipeline 60 is plugged in, the second end face 1212 of the main body 121, the inner wall of the first end of the valve body 11 and the outer wall of the first pipeline 60 form a receiving groove 80 for receiving solder. When the first pipeline 60 is installed in the plug-in groove 1213, the outer wall of the first pipeline 60, the second end face 1212 of the valve mouth piece 12 and the inner peripheral wall of the valve body 11 near the first end form a receiving groove 80 for receiving solder. In the process of welding the first pipeline 60 to the one-way valve, the solder can contact the first pipeline 60, the valve mouth piece 12 and the valve body 11 at the same time after melting, so that the first pipeline 60, the valve mouth piece 12 and the valve body 11 are welded and fixed at one time, and the sealing between the first pipeline 60 and the valve mouth piece 12, and the valve mouth piece 12 and the valve body 11 is completed, thereby improving the assembly efficiency. In addition, by providing the receiving groove 80, the contact area between the solder and the first pipeline 60, the valve port member 12, and the valve body 11 is increased, thereby improving the sealing and reliability of the connection.

[0072] It should be noted that, in this embodiment, the second end of the valve member 12 is located inside the valve body 11, that is, the valve member 12 is entirely located inside the valve body 11, but this is not restrictive, and in some other embodiments not shown in the figure, the valve member 12 may also be partially located inside the valve body 11, that is, the first end is located inside the valve body 11, and the second end is located outside the valve body 11. 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] like Figure 5 As shown, the utility model also discloses embodiment 2 and a one-way valve, whose structure is basically the same as that of embodiment 1, except that, in this embodiment, an avoidance groove 311 is provided on the outer peripheral wall of the first opening 31. In the valve closing position, the first opening 31 of the valve core 30 is located in the matching groove 90. By providing the avoidance groove 311, the distance between the outer peripheral wall of the first opening 31 of the valve core 30 and the inner peripheral wall of the limiting channel 21 can be increased. Therefore, even if the first opening 31 of the valve core 30 is deformed, the outer peripheral wall of the first opening 31 of the valve core 30 and the inner peripheral wall of the limiting channel 21 will not interfere with each other, thereby avoiding affecting the sliding of the valve core 30.

[0074] like Figure 6As shown, the utility model also discloses a third embodiment, and also discloses a one-way valve, whose structure is basically the same as that of the second embodiment, except that the one-way valve further includes: a positioning sleeve 50, which is sleeved on the second end of the valve core 30 and is used for limiting the position with the limiting sleeve 20. In this embodiment, the outer peripheral wall of the valve core 30 is provided with an abutting protrusion 33, the first end sleeve of the positioning sleeve 50 is sleeved on the second end of the valve core 30 and abuts on the abutting protrusion 33, and the second end of the positioning sleeve 50 is an open end, which is used for limiting the position with the limiting portion 23 of the second end of the limiting sleeve 20. By providing the positioning sleeve 50, on the one hand, the axial limiting position can be achieved through the positioning sleeve 50 and the limiting sleeve 20, and on the other hand, a cavity is formed inside the positioning sleeve 50, which can cooperate with the refrigerant from the second pipeline 70, which is more conducive to interaction with the refrigerant, so that the valve core 30 is more easily pushed by the fluid.

[0075] like Figure 7 As shown, the utility model also discloses a fourth embodiment, and also discloses a one-way valve, whose structure is basically the same as that of the first embodiment, except that the blocking structure 312 is a limiting protrusion formed on the inner peripheral wall of the valve core 30. In this embodiment, by radially squeezing the outer peripheral wall of the valve core 30 toward the inside of the valve core 30, the outer peripheral wall of the valve core 30 is concave inward and a limiting protrusion is formed inside the valve core 30, thereby forming a blocking structure 312 that abuts against the insertion section 1223 of the annular protrusion 122, thereby improving the blocking effect.

[0076] like Figure 8 and Fig. 9 The fifth 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, except that, in the present embodiment, a limiting structure 40 is provided on the main body 121, and the limiting sleeve 20 has a first end and a second end in the axial direction, and the first end of the limiting sleeve 20 has a clamping portion 25, and the clamping portion 25 is clamped and matched with the limiting structure 40 to fix the limiting sleeve 20 relative to the main body 121.

[0077] During assembly, the limit sleeve 20 is engaged and limited with the limit structure 40 on the main body 121 through the clamping portion 25, so that the limit sleeve 20 is fixedly connected to the valve mouth piece 12. After the valve mouth piece 12 is welded and fixed to the valve body 11, the limit sleeve 20 is also fixed relative to the valve mouth piece 12 and the valve body 11, thereby eliminating the step of separately welding the limit sleeve 20, simplifying the assembly process and improving the assembly efficiency.

[0078] like Fig. 9As shown, the outer wall of the body 121 has a large diameter section 1214 and a small diameter section 1215 in the axial direction, the small diameter section 1215 is located between the large diameter section 1214 and the first end of the body 121, the large diameter section 1214 of the body 121 abuts against the inner peripheral wall of the valve body 11, and an escape channel is formed between the small diameter section 1215 and the inner peripheral wall of the valve body 11, and the limiting structure 40 is arranged on the small diameter section 1215. It can be understood that in this embodiment, the outer peripheral wall of the small diameter section 1215, the first end face 1211, the outer peripheral wall of the annular protrusion 122 and the inner peripheral wall of the valve body 11 form a flow cavity 13, and the outer wall of the small diameter section 1215 of the valve port member 12 is a part of the inner wall of the flow cavity 13.

[0079] like Figure 8 and Fig. 9 As shown, the limiting sleeve 20 has a first end and a second end in the axial direction. The first end of the limiting sleeve 20 is sleeved on the annular protrusion 122 , and the second end of the limiting sleeve 20 is formed with a limiting portion 23 . The clamping portion 25 is arranged at the first end of the limiting sleeve 20 .

[0080] The clamping portion 25 includes: a limiting sleeve 251 and a hook 252. The inner diameter of the limiting sleeve 251 is larger than the inner diameter of the limiting sleeve 20. The first end of the limiting sleeve 251 forms an inner folding edge. The limiting sleeve 251 is connected to the first end of the limiting sleeve 20 through the inner folding edge. The hook 252 is arranged on the inner circumferential side of the second end of the limiting sleeve 251.

[0081] In this embodiment, the limiting structure 40 is a groove formed on the outer peripheral wall of the small diameter section 1215 of the main body 121 of the valve member 12, and the hook 252 matches the groove. Figure 8 As shown, after the valve port member 12 and the limiting sleeve 20 are assembled, the hook 252 is engaged with the groove, thereby achieving a fixed connection between the valve port member 12 and the limiting sleeve 20 .

[0082] It should be noted that, in the present embodiment, the limiting structure 40 is a card slot, and the clamping portion 25 includes a hook, but this is not restrictive, and in some other embodiments not shown in the figure, the limiting structure 40 may be a hook, and the clamping portion 25 may include a card slot. Without violating the inventive concept of the present utility model, the above situations all fall within the protection scope of the present utility model.

[0083] In the above embodiment, the limiting sleeve 20 and the valve body assembly 10 are fixed by the limiting structure 40, but this is not restrictive. Fig.10In the sixth embodiment shown, a one-way valve is also disclosed, and its structure is basically the same as that of the first embodiment, except that, in this embodiment, the first end of the limit sleeve 20 is sleeved on the annular protrusion 122 and welded and fixed, that is, the limit sleeve 20 and the valve body assembly 10 can be a limit fit or a fixed connection, and the above situations are all within the protection scope of the present utility model.

[0084] According to a second aspect of the utility model, an air conditioner is also disclosed, comprising the one-way valve mentioned above.

[0085] 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 and a second pipeline, characterized in that: The one-way valve comprises: A valve body assembly is provided with a flow chamber inside thereof, and a valve port and a connecting port are provided on the inner wall of the flow chamber, wherein the valve port is used to communicate with the first pipeline, and the connecting port is used to communicate with the second pipeline; A limit sleeve is arranged in the flow cavity, a flow space is formed between the outer wall of the limit sleeve and the inner wall of the flow cavity, a limit channel is arranged inside the limit sleeve, the limit channel is communicated with the valve port, a flow hole is arranged on the limit sleeve, and the limit channel is communicated with the flow space through the flow hole; A valve core is arranged in the limiting passage, an inner cavity is arranged inside the valve core, an end of the valve core facing the valve port has a first opening communicating with the inner cavity, and the valve core is configured to be movable between a valve closing position and a valve opening position; In the valve closing position, the first opening of the valve core is sleeved at the valve port position, and the inner cavity is communicated with the valve port to block the valve port; In the valve opening position, the valve core is separated from the valve port, so that the valve port is connected with the flow hole through the limit passage.

2. The one-way valve according to claim 1, characterized in that: The valve body assembly comprises: A valve body having a first end and a second end in the axial direction and an axially penetrating passage, wherein the second end of the valve body forms the connecting port; The valve port member comprises: a body portion and an annular protrusion, wherein the body portion is plugged into the first end of the valve body, the body portion has a first end and a second end in the axial direction, the first end of the body portion has a first end surface, the first end surface faces the second end of the valve body, the flow cavity is located between the body portion and the second end of the valve body; the second end of the body portion has a second end surface, and the second end surface is provided with a plug-in groove for plugging and matching with the first pipeline; The annular protrusion axially has a first end and a second end, the second end of the annular protrusion is connected to the first end surface of the main body, the valve port extends from the first end of the annular protrusion to the second end and is connected to the plug-in groove, and in the valve closing position, the first opening of the valve core is sleeved on the first end of the annular protrusion to seal the valve port.

3. The one-way valve according to claim 2, characterized in that: The annular protrusion has a positioning section and an insertion section in the axial direction, the outer diameter of the positioning section is larger than the outer diameter of the insertion section, the positioning section is close to the second end of the annular protrusion and connected to the main body, and the insertion section is close to the first end of the annular protrusion and connected to the positioning section; One end of the limit sleeve is sleeved on the positioning section of the annular protrusion, and the inner circumferential wall of the limit channel and the outer circumferential wall of the insertion section form an annular matching groove. In the valve closing position, the circumferential side wall of the first opening of the valve core is located in the matching groove, and the insertion section is plug-fitted with the valve core.

4. The one-way valve according to claim 2, characterized in that: The valve core is a hollow cup-shaped structure, and has a first end and a second end in the axial direction. The first opening is arranged at the first end of the valve core, and the second end of the valve core is a closed end. The outer peripheral wall of the first opening is provided with an avoidance groove.

5. The one-way valve according to claim 4, characterized in that: The inner peripheral wall of the first opening of the valve core is provided with a blocking structure. In the valve closing position, the first end of the annular protrusion abuts against the blocking structure to achieve blocking of the valve port.

6. The one-way valve according to claim 5, characterized in that: The blocking structure is a blocking surface formed on the inner peripheral wall of the first opening of the valve core. In the direction from the first end to the second end of the valve core, the distance between the blocking surface and the axis of the valve core gradually decreases.

7. The one-way valve according to claim 5, characterized in that: The blocking structure is a limiting protrusion formed on the inner peripheral wall of the valve core.

8. The one-way valve according to claim 4, characterized in that: The one-way valve also includes: A positioning sleeve is sleeved on the second end of the valve core and is used for limiting cooperation with the limiting sleeve.

9. The one-way valve according to claim 2, characterized in that: The valve body assembly has a limiting structure, and the limiting sleeve is limitedly matched with the limiting structure so that the limiting sleeve is fixed in the valve body assembly.

10. The one-way valve according to claim 9, characterized in that: The limiting structure is arranged on the inner wall of the valve body, and the limiting sleeve has an abutting portion at one end close to the valve mouth member, the abutting portion abuts against the first end face of the valve mouth member, and the valve mouth member presses the abutting portion against the limiting structure.

11. The one-way valve according to claim 10, characterized in that: The limiting sleeve has a first end and a second end in the axial direction. The first end of the limiting sleeve is sleeved on the annular protrusion. The abutting portion is an annular folded edge formed on the outer peripheral wall of the first end of the limiting sleeve.

12. The one-way valve according to claim 9, characterized in that: The limiting structure is arranged on the main body, the limiting sleeve has a first end and a second end in the axial direction, the first end of the limiting sleeve has a clamping portion, and the clamping portion is clamped and matched with the limiting structure to relatively fix the limiting sleeve and the valve port member.

13. The one-way valve according to claim 2, characterized in that: The second end surface of the main body is located in the valve body, and the second end surface and the inner wall of the first end of the valve body are used to form a receiving groove for receiving solder with the outer wall of the first pipeline.

14. The one-way valve according to claim 2, characterized in that: The valve body is an integrally formed structure, and / or the valve core is an integrally formed structure.

15. An air conditioner, characterized in that: A one-way valve comprising the one-way valve according to any one of claims 1 to 14.

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