Check valve, flow path switching assembly, air conditioning system and air conditioner

Abstract

The utility model discloses a one-way valve, flow path switching assembly, air conditioning system and air conditioner, one-way valve includes: valve shell, the axial one end of valve shell is equipped with the export, valve seat, the axial one end of valve seat and valve shell is connected and is formed valve cavity together, is equipped with the valve port on the valve seat, and the valve port and export communicate with valve cavity, valve core, valve core is movably arranged in valve cavity to open or block the valve port, is equipped with the cavity in valve core, and the side of cavity is open to export, is equipped with the aperture that communicates with cavity and valve cavity on valve core, and the minimum one side gap between the outer peripheral wall of valve core and the inner peripheral wall of valve cavity is less than or equal to 0.2mm. According to the one-way valve of the utility model, by making the one side gap between the outer peripheral wall of valve core and the inner peripheral wall of valve cavity less than or equal to 0.2mm, can limit the activity range of valve core in valve cavity, reduce the abnormal sound of valve core rotation and shaking, thereby reduce the noise when one-way valve operation.

Description

Technical Field

[0001] This utility model relates to the field of air handling equipment technology, and in particular to a one-way valve, a flow path switching component, an air conditioning system, and an air conditioner. Background Technology

[0002] In related technologies, air conditioning systems use one-way valves to control the flow of refrigerant. However, during the refrigerant flow, the valve core moves up and down, causing the one-way valve to vibrate and make noise. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a one-way valve that can reduce the abnormal noise caused by valve core rotation and vibration.

[0004] This utility model also proposes a flow path switching component, which includes the aforementioned one-way valve.

[0005] This utility model also proposes an air conditioning system, which includes the above-mentioned flow path switching component.

[0006] This utility model also proposes an air conditioner, which includes the above-mentioned air conditioning system.

[0007] A one-way valve according to an embodiment of the present invention includes: a valve body, wherein one axial end of the valve body is provided with an outlet; a valve seat, wherein the valve seat is connected to one axial end of the valve body opposite to the outlet and together form a valve cavity, the valve seat is provided with a valve port, the valve port and the outlet are in communication with the valve cavity; and a valve core, wherein the valve core is movably disposed in the valve cavity to open or block the valve port, the valve core is provided with a cavity, the cavity is open on the side facing the outlet, the valve core is provided with an opening communicating with the cavity and the valve cavity, and the minimum single-sided gap between the outer peripheral wall of the valve core and the inner peripheral wall of the valve cavity is less than or equal to 0.2 mm; or the sum of the minimum double-sided gaps between the outer peripheral wall of the valve core and the inner peripheral wall of the valve cavity is less than or equal to 0.4 mm.

[0008] According to the one-way valve of this utility model embodiment, by making the single-sided gap between the outer peripheral wall of the valve core and the inner peripheral wall of the valve cavity less than or equal to 0.2 mm; or the sum of the minimum double-sided gaps between the outer peripheral wall of the valve core and the inner peripheral wall of the valve cavity less than or equal to 0.4 mm, the range of motion of the valve core in the valve cavity can be limited, reducing the abnormal noise of valve core rotation and vibration, thereby reducing the noise of the one-way valve during operation.

[0009] According to some embodiments of this utility model, the valve core includes: a column segment, with its outer diameter remaining constant along the axial direction of the valve port, or the difference between the maximum and minimum values ​​of the outer diameter of the column segment being less than or equal to 0.5 mm; a tapered section, one end of which is connected to the end of the column segment facing away from the outlet, the outer diameter of which gradually decreases in the direction from the outlet to the valve port, the tapered section being used to block or open the valve port, at least a portion of which is provided on the tapered section, and when the tapered section blocks the valve port, a portion of which extends into the valve port, the opening being located on the side of the valve port facing the outlet or the opening being located on the side of the valve port facing the outlet at the point of contact between the tapered section and the valve port, the single-sided gap between the outer peripheral wall of the column segment and the inner peripheral wall of the valve cavity being less than or equal to the single-sided gap between the outer peripheral wall of the tapered section and the inner peripheral wall of the valve cavity.

[0010] In some embodiments of this utility model, the minimum radius of the end of the tapered section away from the column section is R, and the moving stroke of the valve core along the axial direction of the valve port is L2, satisfying: R≤L2.

[0011] According to some embodiments of this utility model, the openings are multiple openings spaced apart, and on the projection plane perpendicular to the valve port axis, the projection patterns of the multiple openings are axisymmetric or centrally symmetric.

[0012] According to some embodiments of this utility model, the one-way valve is made of stainless steel; and / or the valve body is made of stainless steel; and / or the valve seat is made of stainless steel; and / or the valve core is made of stainless steel.

[0013] According to some embodiments of this utility model, the valve core is made of metal material, and the weight of the valve core is less than or equal to 5g; and / or the angle between the axis of the valve core and the vertical direction is 0-15°; and / or the minimum opening pressure difference of the one-way valve or the valve core is ≤0.01MPa; and / or the valve core is made of stainless steel, and the wall thickness of the valve core is 0.3mm-0.8mm; and / or the maximum outer diameter of the valve core is 5mm-20mm; and / or the length of the valve core is 8mm-25mm.

[0014] According to some embodiments of this utility model, the difference between the inner diameter of the valve cavity and the outer diameter of the column segment is less than or equal to 0.4 mm; and / or the ratio of the length of the column segment to the difference between the inner diameter of the valve cavity and the outer diameter of the column segment is greater than or equal to 15; and / or the ratio of the length of the column segment to the length of the tapered section is greater than or equal to 1 and less than or equal to 3.

[0015] According to some embodiments of the present invention, the valve housing includes a receiving portion, a connecting portion, and an outlet portion connected in sequence. The valve core is movably disposed in the receiving portion, and the outlet portion has the outlet. The inner diameter of the outlet portion is smaller than the inner diameter of the receiving portion. The connecting portion connects the receiving portion and the outlet portion and is used to restrict the movement of the valve core.

[0016] According to some embodiments of the present invention, the outer peripheral surface of the valve seat near the valve housing is formed with a mounting groove, the valve housing is sleeved outside the mounting groove and surrounds the valve port; and / or the outer peripheral surface of the valve housing is flush with the outer peripheral surface of the valve seat.

[0017] According to some embodiments of the present invention, an insertion hole is formed on the inner circumferential surface of the valve seat at the end away from the valve body. The inner diameter of the insertion hole is larger than the inner diameter of the valve port. The insertion hole is used to connect with a connecting pipe. The inner diameter of the insertion hole is larger than the outer diameter of the valve core. And / or the inner diameter of the connecting pipe is greater than or equal to the inner diameter of the valve port.

[0018] The flow path switching component according to an embodiment of the present invention includes: the aforementioned one-way valve, wherein there are multiple one-way valves, including a first one-way valve, a second one-way valve, a third one-way valve, and a fourth one-way valve. The first one-way valve, the second one-way valve, the third one-way valve, and the fourth one-way valve are connected end-to-end in sequence. A first interface is provided between the first one-way valve and the second one-way valve, a second interface is provided between the second one-way valve and the third one-way valve, a third interface is provided between the third one-way valve and the fourth one-way valve, and a fourth interface is provided between the fourth one-way valve and the first one-way valve. The first one-way valve is unidirectionally connected from the fourth interface to the first interface, the second one-way valve is unidirectionally connected from the first interface to the second interface, the third one-way valve is unidirectionally connected from the third interface to the second interface, and the fourth one-way valve is unidirectionally connected from the fourth interface to the third interface.

[0019] According to the flow path switching component of this utility model embodiment, by setting multiple one-way valves and integrating them into one component, the number of pipe welding points is reduced, costs are lowered, and a fixed refrigerant flow direction is achieved. Furthermore, based on achieving flow path switching, no control logic program or electric control is required, making operation convenient and energy-saving. Moreover, using the aforementioned one-way valves can limit the range of motion of the valve core within the valve chamber, reducing abnormal noise from valve core rotation and vibration, thereby reducing the noise during one-way valve operation and improving the user experience.

[0020] In some embodiments of this utility model, a first three-way pipe is connected between the first one-way valve and the second one-way valve, and the outlet of the first one-way valve, the valve port of the second one-way valve, and the first interface are connected through the first three-way pipe; and / or, a second three-way pipe is connected between the second one-way valve and the third one-way valve, and the outlet of the second one-way valve, the outlet of the third one-way valve, and the second interface are connected through the second three-way pipe; and / or, a third three-way pipe is connected between the third one-way valve and the fourth one-way valve, and the valve port of the third one-way valve, the outlet of the fourth one-way valve, and the third interface are connected through the third three-way pipe; and / or, a fourth three-way pipe is connected between the fourth one-way valve and the first one-way valve, and the valve port of the fourth one-way valve, the valve port of the first one-way valve, and the fourth interface are connected through the fourth three-way pipe.

[0021] In some embodiments of this utility model, the valve body and valve seat of the plurality of one-way valves are stainless steel parts, and the first tee pipe, the second tee pipe, the third tee pipe and the fourth tee pipe are copper parts. The valve body and the valve seat are directly welded together, and the valve body and the corresponding tee pipe are welded together by solder.

[0022] In some embodiments of this utility model, the first tee pipe and the third tee pipe are both T-type tee pipes, the second tee pipe and the fourth tee pipe are both Y-type tee pipes, the axis of the first check valve and the axis of the second check valve coincide, the axis of the third check valve and the axis of the fourth check valve coincide and are parallel to and spaced apart from the axis of the first check valve, and the second tee pipe and the fourth tee pipe are located at both ends of the length direction of the flow path switching assembly.

[0023] In some embodiments of this utility model, the first one-way valve and the third one-way valve are arranged side by side and spaced apart, and the minimum gap between the outer peripheral surface of the valve shell of the first one-way valve and the outer peripheral surface of the valve shell of the third one-way valve is greater than or equal to 5 mm and less than or equal to 10 mm.

[0024] In some embodiments of this utility model, the maximum inner diameter of the cavity is D1, the inner diameters of the first tee pipe, the second tee pipe, the third tee pipe and the fourth tee pipe are D2, and the minimum inner diameter of the valve port is D3, and the following conditions are met: D1 > D2 > D3.

[0025] The air conditioning system according to an embodiment of the present invention includes the flow path switching component described above.

[0026] According to the air conditioning system of this utility model embodiment, by setting the above-mentioned flow path switching component and multiple one-way valves, and integrating the multiple one-way valves into one component, the number of pipe welding points is reduced, the cost is lowered, and a fixed refrigerant flow direction is achieved. Furthermore, based on the flow path switching, no control logic program or electric control is required, making operation convenient and energy-saving. Moreover, using the above-mentioned one-way valves can limit the range of motion of the valve core within the valve chamber, reducing abnormal noise from valve core rotation and vibration, thereby reducing the noise during one-way valve operation and improving the user experience.

[0027] The air conditioner according to an embodiment of the present invention includes the air conditioning system described above.

[0028] According to the embodiment of this utility model, the air conditioner, by setting the above-mentioned air conditioning system, the above-mentioned flow path switching component, and multiple one-way valves, and integrating the multiple one-way valves into one component, reduces pipe welding points, lowers costs, and achieves a fixed refrigerant flow direction. Furthermore, based on achieving flow path switching, no control logic program or electric control is required, making operation convenient and energy-saving. Moreover, using the above-mentioned one-way valves can limit the range of motion of the valve core within the valve chamber, reducing abnormal noise from valve core rotation and vibration, thereby reducing the noise during one-way valve operation and improving the user experience.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of the one-way valve according to an embodiment of the present utility model; Figure 2 It is along Figure 1 Sectional view of line AA in the middle; Figure 3 This is a perspective view of the flow path switching component according to an embodiment of the present utility model; Figure 4 This is a front view of the flow path switching component according to an embodiment of the present utility model; Figure 5 This is an exploded view of the flow path switching component according to an embodiment of the present utility model; Figure 6 This is a side view of the flow path switching component according to an embodiment of the present utility model; Figure 7 It is along Figure 6 Sectional view of the middle BB line; Figure 8This is a cross-sectional view of a flow path switching assembly according to an embodiment of the present utility model, wherein the second check valve and the fourth check valve are in operation; Figure 9 This is a cross-sectional view of a flow path switching assembly according to an embodiment of the present utility model, wherein the first check valve and the third check valve are in operation; Figure 10 This is a perspective view of a flow path switching component according to another embodiment of the present invention; Figure 11 yes Figure 10 Cross-sectional view of the flow path switching component.

[0031] Figure label: 100. Flow path switching component; 1. Check valve; 11. Valve body; 111. Outlet; 112. Receiving part; 113. Connecting part; 114. Outlet part; 12. Valve seat; 121. Valve cavity; 122. Valve port; 1221. First conical surface; 1222. Chamfered surface; 123. Mounting groove; 124. Insertion hole; 13. Valve core; 131. Cavity; 132. Opening; 133. Column section; 1331. Guide section; 134. Tapered section; 1341. Second conical surface; 1342. Third conical surface; 1a. First check valve; 1b. Second check valve; 1c. Third check valve; 1d. Fourth check valve; 21. First interface; 22. Second interface; 23. Third interface; 24. Fourth interface; 31. First tee pipe; 32. Second tee pipe; 33. Third tee pipe; 34. Fourth tee pipe; 41. First takeover; 42. Second takeover; 43. Third takeover; 44. Fourth takeover. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The one-way valve 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0035] like Figure 1 and Figure 2 As shown, combined with Figure 7 According to an embodiment of the present invention, the one-way valve 1 includes a valve body 11, a valve seat 12, and a valve core 13.

[0036] Specifically, the valve housing 11 has an outlet 111 at one axial end, the valve seat 12 is connected to the axial end of the valve housing 11 away from the outlet 111 and together form the valve cavity 121, the valve seat 12 has a valve port 122, the valve port 122 and the valve seat 12 can be coaxially arranged, the valve port 122 and the outlet 111 are connected to the valve cavity 121, the valve core 13 is movably disposed in the valve cavity 121 to open or block the valve port 122, the valve core 13 has a cavity 131 inside, the cavity 131 is open on the side facing the outlet 111, and the valve core 13 has an opening 132 that communicates with the cavity 131 and the valve cavity 121.

[0037] The one-way valve 1 allows fluid to flow unidirectionally from the valve port 122 to the outlet 111, meaning fluid cannot flow from the outlet 111 to the valve port 122. When fluid enters through the valve port 122, the thrust of the fluid pushes the valve core 13 towards the outlet 111, causing the valve core 13 to open the valve port 122. Fluid enters the valve chamber 121, and a small portion of the fluid can flow to the outlet 111 through the gap between the valve core 13 and the inner peripheral wall of the valve chamber 121. Most of the fluid can enter the cavity 131 through the opening 132 and then flow from the open side of the cavity 131 to the outlet 111. Finally, the fluid flows out from the outlet 111. One-way valve 1 is connected from valve port 122 to outlet 111; when fluid enters from outlet 111, most of the fluid enters cavity 131 through the open side of cavity 131. Under the action of fluid thrust, valve core 13 is pushed toward valve port 122, thereby causing valve core 13 to block valve port 122. At this time, opening 132 is located in valve cavity 121 and connects valve cavity 121 and cavity 131, and one-way valve 1 cannot be connected from outlet 111 to valve port 122.

[0038] Furthermore, the single-sided gap between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 121 is less than or equal to 0.2 mm. This limits the range of motion of the valve core 13 within the valve cavity 121, reducing abnormal noises caused by the rotation and vibration of the valve core 13.

[0039] The single-sided clearance between the outer peripheral wall of the column segment 133 and the inner peripheral wall of the valve cavity 121 can be half the difference between the inner diameter of the valve cavity 121 and the outer diameter of the column segment 133. The single-sided clearance between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 121 is greater than 0, which facilitates the movement of the valve core 13 within the valve cavity 121. For example, the single-sided clearance between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 121 can be 0.2mm, 0.19mm, 0.18mm, 0.17mm, 0.16mm, 0.15mm, 0.14mm, 0.13mm, 0.12mm, 0.11mm, 0.1mm, 0.09mm, 0.08mm, 0.07mm, 0.06mm, 0.05mm, 0.04mm, or 0.03mm, etc.

[0040] According to the one-way valve 1 of the present utility model embodiment, by making the single-sided gap between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 121 less than or equal to 0.2mm, the range of motion of the valve core 13 in the valve cavity 121 can be limited, reducing the abnormal noise of the valve core 13 rotation and vibration, thereby reducing the noise of the one-way valve 1 during operation.

[0041] In some embodiments of this invention, the sum of the minimum bilateral clearances between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 12 is less than or equal to 0.4 mm. This limits the range of motion of the valve core 13 within the valve cavity 121, reducing abnormal noise from the rotation and vibration of the valve core 13. Specifically, the sum of the minimum bilateral clearances between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 121 can be the minimum difference between the inner diameter of the valve cavity 12 and the outer diameter of the valve core 13.

[0042] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, for reference Figure 7 The valve core 13 includes a column section 133 and a tapered section 134. Along the axial direction of the valve port 122, the outer diameter of the column section 133 remains constant, or the difference between the maximum and minimum outer diameter of the column section 133 is less than or equal to 0.5 mm. For example, in... Figure 1 and Figure 2 In the example shown, the end of column segment 133 near outlet 111 has guide segment 1331. The outer diameter of guide segment 1331 gradually decreases in the direction of column segment 133 toward outlet 111, which facilitates the installation of column segment 133 into valve housing 11.

[0043] One end of the tapered section 134 is connected to the end of the column section 133 opposite to the outlet 111. In the direction from the outlet 111 to the valve port 122, the outer diameter of the tapered section 134 gradually decreases. The tapered section 134 is used to block or open the valve port 122. At least a portion of the opening 132 is provided on the tapered section 134. When the tapered section 134 blocks the valve port 122, a portion of the tapered section 134 extends into the valve port 122. The opening 132 is located on the side of the valve port 122 facing the outlet 111, or the opening 132 is located on the side of the abutment between the valve port 122 and the tapered section 134 facing the outlet 111. The cavity 131 penetrates the column section 133 and extends to the tapered section 134.

[0044] It is understandable that the single-sided clearance between the outer peripheral wall of the column segment 133 and the inner peripheral wall of the valve cavity 121 is less than or equal to the single-sided clearance between the outer peripheral wall of the tapered section 134 and the inner peripheral wall of the valve cavity 121. The minimum single-sided clearance between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 121 can be either the single-sided clearance between the outer peripheral wall of the column segment 133 and the inner peripheral wall of the valve cavity 121 or half the difference between the inner diameter of the valve cavity 121 and the outer diameter of the column segment 133.

[0045] The column section 133 is used to guide the valve core 13, and the tapered section 134 facilitates the sealing of the valve port 122, reducing the leakage when the valve port 122 is sealed. At least a portion of the opening 132 is provided on the tapered section 134, which helps to increase the projected area of ​​the opening 132 on the projection plane perpendicular to the axis of the valve port 122, increase the flow area of ​​the fluid, help to reduce the pressure drop of the fluid when passing through the check valve 1, improve the energy efficiency of the system using the check valve 1, and reduce the noise when the fluid flows through the check valve 1, thus improving the user experience.

[0046] Furthermore, when the converging section 134 seals the valve port 122, a portion of the converging section 134 extends into the valve port 122, facilitating the sealing of the valve port 122. The opening 132 is located on the side of the valve port 122 facing the outlet 111, or the opening 132 is located on the side of the contact point between the valve port 122 and the converging section 134 facing the outlet 111. This prevents the valve port 122 and the valve cavity 121 from communicating through the opening 132, thus preventing fluid leakage and ensuring the reliability of sealing the valve port 122. The inner circumferential wall of the valve port 122 is an inclined surface that mates with the converging section 134.

[0047] In some embodiments of this utility model, such as Figure 2 As shown, the inner surface of the valve port 122 has a first conical surface 1221 and a chamfered surface 1222. The chamfered surface 1222 connects to the first conical surface 1221 and is located at the end of the first conical surface 1221 away from the outlet 111. The outer surface of the tapered section 134 has a second conical surface 1341. The taper of the first conical surface 1221 is greater than the taper of the second conical surface 1341. When the tapered section 134 blocks the valve port 122, the first conical surface 1221 and / or the chamfered surface 1222 abut against the second conical surface 1341. This increases the reliability of the valve core 13 when blocking the valve port 122.

[0048] In some embodiments of this utility model, a third conical surface 1342 is formed on the outer surface of the tapered section 134. The third conical surface 1342 is located between the second conical surface 1341 and the cylindrical section 133. The taper of the third conical surface 1342 is greater than the taper of the first conical surface 1341. At least a portion of the plurality of openings 132 are formed on the third conical surface 1342. This ensures that when the tapered section 134 blocks the valve port 122, the openings 132 cannot connect the valve chamber 121 and the valve port 122. It also helps to increase the flow area of ​​the fluid, reduce the pressure drop of the fluid when passing through the check valve 1, improve the energy efficiency of the system using the check valve 1, and reduce the noise of the fluid flowing through the check valve 1, thus improving the user experience.

[0049] In some embodiments of this utility model, the difference between the inner diameter of the valve cavity 121 and the outer diameter of the column segment 133 is less than or equal to 0.4 mm. This limits the range of motion of the column segment 133 within the valve cavity 121, thereby limiting the range of motion of the valve core 13 within the valve cavity 121 and reducing abnormal noises from the rotation and vibration of the valve core 13.

[0050] The sum of the minimum bilateral clearances between the outer peripheral wall of the valve core 13 and the inner peripheral wall of the valve cavity 121 can be the difference between the inner diameter of the valve cavity 121 and the outer diameter of the column segment 133.

[0051] The difference between the outer diameter of the column segment 133 and the inner diameter of the valve cavity 121 is greater than 0, which facilitates the movement of the valve core 13 within the valve cavity 121. For example, the difference between the outer diameter of the column segment 133 and the inner diameter of the valve cavity 121 can be 0.4mm, 0.38mm, 0.35mm, 0.33mm, 0.3mm, 0.29mm, 0.27mm, 0.25mm, 0.23mm, 0.21mm, 0.2mm, 0.19mm, 0.18mm, 0.17mm, 0.16mm, 0.15mm, 0.14mm, 0.13mm, 0.12mm, 0.11mm, 0.1mm, 0.09mm, 0.08mm, 0.07mm, 0.06mm, 0.05mm, 0.04mm, or 0.03mm, etc.

[0052] In some embodiments of this utility model, the ratio of the length of column segment 133 to the difference between the outer diameter of column segment 133 and the inner diameter of valve cavity 121 is greater than or equal to 15, thereby preventing valve core 13 from jamming and reducing vibration / shaking when valve core 13 moves.

[0053] In some embodiments of this utility model, the ratio of the length of the column segment 133 to the length of the tapered segment 134 is greater than or equal to 1 and less than or equal to 3. This avoids the tapered segment 134 from being too long while ensuring that the length of the valve core 13 is small, which would cause the valve core 13 to tilt and vibrate due to excessive weight of the tapered segment 134 when the valve core 13 moves.

[0054] In some embodiments of this invention, the minimum radius of the end of the tapered section 134 away from the column section 133 is R, and the travel of the valve core 13 along the axial direction of the valve port 122 is L2, satisfying: R≤L2. This allows for a reduction in pressure drop while making the one-way valve 1 as compact as possible, saving material costs.

[0055] Specifically, under the same valve core 13 travel, the larger the minimum radius R of the end of the converging section 134 away from the column section 133, the smaller the distance between the outer peripheral wall of the converging section 134 and the inner peripheral wall of the valve port 122 when the valve core 13 opens the valve port 122, resulting in a smaller fluid flow area and a larger pressure drop; the smaller the minimum radius R of the end of the converging section 134 away from the column section 133, the larger the distance between the outer peripheral wall of the converging section 134 and the inner peripheral wall of the valve port 122 when the valve core 13 opens the valve port 122, resulting in a larger fluid flow area and a smaller pressure drop.

[0056] When the minimum radius R of the end of the converging section 134 away from the column section 133 is the same, the larger the stroke of the valve core 13, the larger the distance between the outer peripheral wall of the converging section 134 and the inner peripheral wall of the valve port 122 when the valve core 13 opens the valve port 122, the larger the fluid flow area and the smaller the pressure drop; the smaller the stroke of the valve core 13, the smaller the distance between the outer peripheral wall of the converging section 134 and the inner peripheral wall of the valve port 122 when the valve core 13 opens the valve port 122, the smaller the fluid flow area and the larger the pressure drop.

[0057] Optionally, the minimum radius R of the end of the tapered section 134 away from the column section 133 is 1.5mm-3mm, such as 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm or 2.9mm, etc.

[0058] In some embodiments of this utility model, multiple openings 132 are spaced apart; specifically, the number of openings 132 is greater than or equal to two. Multiple openings 132 can increase the flow area of ​​the fluid, which is beneficial for reducing pressure drop. Optionally, the multiple openings 132 can be spaced apart in the circumferential direction of the valve core 13.

[0059] Furthermore, on the projection plane perpendicular to the axis of the valve port 122, the projected patterns of the multiple openings 132 are axisymmetric or centrally symmetric. This ensures the uniformity of force on the valve core 13, reducing rotation and vibration noise of the valve core 13. Figure 1 In the example shown, there are four openings 132. The four openings 132 are located on the outer peripheral wall of the tapered section 134 and are evenly spaced along the circumferential direction of the valve core 13.

[0060] In some embodiments of this utility model, along the axial direction of the valve port 122, the length of the valve core 13 is L1, and the stroke of the valve core 13 is L2, satisfying: L2≤L1≤5*L2. This allows for a reduction in pressure drop while making the one-way valve 1 as compact as possible, saving material costs. The length L1 of the valve core 13 can be equal to the stroke L2, or it can be 2, 3, 4, or 5 times the stroke of the valve core 13.

[0061] Optionally, along the axial direction of the valve port 122, the length L1 of the valve core 13 can be 8mm-25mm, such as 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm or 16mm.

[0062] In some embodiments of this utility model, the one-way valve 1 is made of stainless steel, and / or the valve body 11 is made of stainless steel, and / or the valve seat 12 is made of stainless steel, and / or the valve core 13 is made of stainless steel. This can avoid problems such as rusting of the one-way valve 1, reduce the cost of the one-way valve 1 while ensuring the structural strength of the one-way valve 1, and facilitate the welding connection of the one-way valve 1 with other pipeline structures.

[0063] In some embodiments of this utility model, the valve core 13 is a metal part, made of metal material, and its weight is less than or equal to 5g. This reduces the weight of the valve core 13, decreases the resistance during its movement, and optimizes the "clicking" sound and sealing issues caused by the valve core 13's movement during low differential pressure operation. Furthermore, the use of a lighter metal material and the hollow valve core design maximize cost and performance optimization. Moreover, the weight of the valve core 13 is greater than or equal to 1g, thus avoiding excessively thin walls that could compromise its structural strength.

[0064] In some embodiments of this utility model, the angle between the axis of the valve core 13 and the vertical direction is 0-15°, thereby allowing the valve core 13 to seal the valve port 122 under its own weight. For example, the angle between the axis of the valve core 13 and the vertical direction can be 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, or 15°.

[0065] In some embodiments of this utility model, the minimum opening pressure difference of the one-way valve or valve core 13 is ≤0.01MPa, which ensures that the valve core 13 can open under a small pressure, avoids the valve core 13 from shaking up and down, and thus avoids shaking noise.

[0066] In some embodiments of this utility model, the valve core 13 is made of stainless steel, and the wall thickness of the valve core 13 is 0.3mm-0.8mm. This allows for a reduction in the weight of the valve core 13 and a reduction in pressure loss while ensuring the structural strength of the valve core 13. For example, the wall thickness of the valve core 13 can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, or 0.8mm.

[0067] In some embodiments of this utility model, the maximum outer diameter of the valve core 13 is 5mm-20mm, which reduces the weight of the valve core 13 and reduces pressure loss while ensuring the structural strength of the valve core 13. For example, the maximum outer diameter of the valve core 13 can be 10mm, 12mm, 13mm, 13.6mm, 13.8mm, 14mm, 16mm, 18mm or 20mm.

[0068] In some embodiments of this utility model, the length of the valve core 13 is 8mm-25mm. This allows for a reduction in the weight of the valve core 13 and a decrease in pressure loss while maintaining its structural strength. For example, the length of the valve core 13 can be 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, or 16mm.

[0069] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the valve housing 11 includes a receiving portion 112, a connecting portion 113, and an outlet portion 114 connected in sequence. The valve core 13 is movably disposed in the receiving portion 112. The outlet portion 114 has an outlet 111. The inner diameter of the outlet portion 114 is smaller than the inner diameter of the receiving portion 112. The connecting portion 113 connects the receiving portion 112 and the outlet portion 114 and is used to restrict the movement of the valve core 13. Thus, the valve core 13 can be limited by the structure of the valve housing 11 itself, which simplifies the structure of the one-way valve 1 and reduces the number of additional parts.

[0070] In some embodiments of this utility model, a mounting groove 123 is formed on the outer peripheral surface of the valve seat 12 near the valve housing 11. The valve housing 11 is fitted over the mounting groove 123 and surrounds the valve port 122. The inner wall of the mounting groove 123 can limit the valve housing 11, improving the reliability of the fixation between the valve housing 11 and the valve seat 12. In addition, the valve housing 11 surrounding the valve seat 12 allows for a larger diameter of the valve cavity 121 and a larger diameter of the valve core 13, facilitating the setting of a larger opening 132 in the valve core 13 and reducing pressure loss.

[0071] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, combined with Figure 3 The outer peripheral surface of valve 11 is flush with the outer peripheral surface of valve seat 12. This makes the appearance of check valve 1 neater, avoids scratches, and ensures the reliability of check valve 1.

[0072] In some embodiments of this utility model, such as Figure 2As shown, a insertion hole 124 is formed on the inner circumferential surface of the valve seat 12 at the end away from the valve body 11. The inner diameter of the insertion hole 124 is larger than the inner diameter of the valve port 122. The insertion hole 124 is used to connect with the connecting pipe. The inner diameter of the insertion hole 124 is larger than the outer diameter of the valve core 13. This ensures that the inner diameter of the valve port 122 is smaller than the inner diameter of the connecting pipe, thereby reducing pressure loss at other locations.

[0073] In some embodiments of this utility model, such as Figure 2 As shown, the inner diameter of the connecting pipe is greater than or equal to the inner diameter of valve port 122. This reduces pressure loss at the connecting pipe.

[0074] In some embodiments of this utility model, the opening 132 can be circular or square, etc. Of course, the opening 132 can also be other polygons, such as regular polygons or irregular polygons.

[0075] In some embodiments of this utility model, the total area of ​​the plurality of openings 132 is A, the minimum flow area of ​​the valve port 122 (the minimum cross-sectional area of ​​the valve port 122) is B and satisfies: 3 / 2 ≥ B / A ≥ 1 / 2, and / or on the projection plane perpendicular to the axis of the valve port 122, the sum of the areas of the projected patterns of the plurality of openings 132 is C and satisfies: 3 / 2 ≥ B / C ≥ 2 / 3. This reduces the pressure drop when fluid flows through the check valve 1, improves the energy efficiency of the system using the check valve 1, and reduces the noise when fluid flows through the check valve 1, thus improving the user experience.

[0076] Optionally, B / A can be 3 / 2, 1, 1 / 2, etc.

[0077] Optionally, B / C can be 3 / 2, 1, 1 / 2, etc.

[0078] In some embodiments of this utility model, reference is made to Figure 8 and Figure 9 As shown, when the converging section 134 opens the valve port 122, the converging section 134 is located outside the valve port 122, and the end face of the converging section 134 is spaced apart from the end face of the valve seat 12. This allows the flow area formed between the converging section 134 and the valve port 122 to be larger than the area of ​​the valve port 122, reducing the conduction resistance.

[0079] The flow path switching component 100 according to an embodiment of the present invention is described below.

[0080] like Figures 3-7 As shown, the flow path switching component 100 according to an embodiment of the present utility model includes the one-way valve 1 described above.

[0081] Specifically, there are multiple check valves 1, including a first check valve 1a, a second check valve 1b, a third check valve 1c, and a fourth check valve 1d. The first check valve 1a, the second check valve 1b, the third check valve 1c, and the fourth check valve 1d are connected end to end in sequence. There is a first interface 21 between the first check valve 1a and the second check valve 1b, a second interface 22 between the second check valve 1b and the third check valve 1c, a third interface 23 between the third check valve 1c and the fourth check valve 1d, and a fourth interface 24 between the fourth check valve 1d and the first check valve 1a. The first check valve 1a is unidirectionally connected from the fourth interface 24 to the first interface 21, the second check valve 1b is unidirectionally connected from the first interface 21 to the second interface 22, the third check valve 1c is unidirectionally connected from the third interface 23 to the second interface 22, and the fourth check valve 1d is unidirectionally connected from the fourth interface 24 to the third interface 23.

[0082] For example, when the flow path switching component 100 is used in an air conditioning system, the air conditioning system may also include a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, and a throttling device. The compressor has an exhaust port and a return port; the four-way valve has a first port, a second port, a third port, and a fourth port; the first port is connected to one of the second and fourth ports, the third port is connected to the other of the second and fourth ports; the exhaust port is connected to the first port, the return port is connected to the third port; one end of the indoor heat exchanger is connected to the second port, one end of the outdoor heat exchanger is connected to the fourth port; the first interface 21 is connected to the other end of the indoor heat exchanger, the third interface 23 is connected to the other end of the outdoor heat exchanger, the second interface 22 and the fourth interface 24 are connected, and the throttling device is located between the second interface 22 and the fourth interface 24. Additionally, a modular radiator for cooling the electrical control box may be provided between the second interface 22 and the fourth interface 24, and the throttling device is located between the modular radiator and the fourth interface 24.

[0083] like Figure 8 As shown, during the specific operation of the air conditioning system, when the system is in cooling mode, the compressor compresses the refrigerant into a high-temperature, high-pressure gas. The high-pressure gaseous refrigerant flows to the outdoor heat exchanger through the compressor's exhaust port, the first port of the four-way valve, and the fourth port. The outdoor heat exchanger can exchange heat with the external environment and dissipate heat through condensation. The refrigerant flows within the outdoor heat exchanger and releases heat to the external environment, thus changing from a gaseous state to a liquid state. Then, the high-pressure liquid refrigerant flowing out of the outdoor heat exchanger enters the flow path switching module through the third port 23. At this time, the third one-way valve 1c controls the connection between the second port 22 and the third port 23, allowing the refrigerant to flow from the third port 23 to the second port 22. The refrigerant flows from the second port 22 through the module radiator and exchanges heat with the electrical control box, and then flows to the throttling device. The throttling device can reduce the pressure of the refrigerant, and then the low-pressure liquid refrigerant returns to the flow path switching module through the fourth port 24.

[0084] At this time, the first one-way valve 1a controls the connection between the first port 21 and the fourth port 24, the second one-way valve 1b controls the disconnection between the second port 22 and the first port 21, and the fourth one-way valve 1d controls the disconnection between the fourth port 24 and the third port 23. Thus, the refrigerant flows from the fourth port 24 through the first one-way valve 1a and out of the first port 21, switching the flow path and flowing to the indoor heat exchanger. The indoor heat exchanger absorbs heat, and the refrigerant vaporizes inside, changing from a liquid to a gaseous state. This carries away the heat from the airflow passing over the surface of the indoor heat exchanger, and the low-temperature airflow is delivered into the room by the indoor unit to achieve cooling. Simultaneously, the low-pressure gaseous refrigerant flows to the second port of the four-way valve and then from the third port to the return port to return to the compressor for further compression, thus forming a refrigerant cycle and achieving the cooling effect of the air conditioning system.

[0085] Similarly, such as Figure 9 As shown, when the air conditioning system is in heating mode, the compressor compresses the refrigerant into a high-temperature, high-pressure gas. The high-pressure gaseous refrigerant flows through the compressor's exhaust port, the first port and the second port of the four-way valve to the indoor heat exchanger. The indoor heat exchanger exchanges heat with the airflow flowing across its surface. The airflow absorbs heat, and the refrigerant condenses and dissipates heat. The high-temperature airflow is then delivered into the room by the indoor unit to achieve the purpose of heating. The refrigerant flows within the indoor heat exchanger and releases heat into the indoor environment, thus changing from a gaseous state to a liquid state. The high-pressure liquid refrigerant flowing out of the indoor heat exchanger then enters the flow path switching module through the first port 21. At this time, the second one-way valve 1b controls the second port 22 to connect with the first port 21, allowing the refrigerant to flow from the first port 21 to the second port 22. The refrigerant then flows through the module radiator and exchanges heat with the electrical control box through the second port 22, and then flows to the throttling device. The throttling device can reduce the pressure of the refrigerant, and subsequently, the low-pressure liquid refrigerant returns to the flow path switching module through the fourth port 24.

[0086] At this time, the fourth one-way valve 1d controls the connection between the fourth port 24 and the third port 23, the first one-way valve 1a controls the disconnection between the first port 21 and the fourth port 24, and the third one-way valve 1c controls the disconnection between the second port 22 and the third port 23. Thus, the refrigerant flows from the fourth port 24 through the fourth one-way valve 1d and then out of the third port 23 to the flow path switching module and flow to the outdoor heat exchanger. The outdoor heat exchanger absorbs heat. The refrigerant is heated and vaporized inside the outdoor heat exchanger, changing from a liquid to a gaseous state, thereby carrying away the heat flowing through the outdoor environment. The low-pressure gaseous refrigerant flows to the fourth port of the four-way valve and then from the third port to the return port to return to the compressor for compression again, thus forming a refrigerant cycle and achieving the heating effect of the air conditioning system.

[0087] In the flow path switching component 100, the refrigerant flow direction can only be fourth port 24 - first port 21 (third port 23) - second port 22, forming a constant outlet 111 second port 22 (refrigerant can only flow out, connecting to the block radiator in the system), a variable port first port 21 (refrigerant can flow in or out, connecting to the heat exchanger in the system), a variable port third port 23 (refrigerant can flow in or out, connecting to the heat exchanger in the system), and a constant inlet fourth port 24 (refrigerant can only flow in, connecting to the throttling device in the system). Furthermore, during stable operation of the system, two of the first check valve 1a, second check valve 1b, third check valve 1c, and fourth check valve 1d must be in the open state, and two must be in the closed state, and the states of any two adjacent check valves 1 are inconsistent.

[0088] In this embodiment, the refrigerant is reversed by the flow path switching component 100. Whether cooling or heating, the refrigerant first passes through the modular radiator and then through the throttling device, avoiding the problem of condensation in the modular radiator pipes. This enables the modular radiator system to circulate through a single throttling component, reducing costs and improving system reliability.

[0089] This application integrates the first one-way valve 1a, the second one-way valve 1b, the third one-way valve 1c, and the fourth one-way valve 1d into a single component through integration and structural optimization. This reduces pipe welding points, lowers costs, and achieves a fixed refrigerant flow direction. Furthermore, it eliminates the need for control logic programs and electric controls while enabling flow path switching, making operation convenient and energy-efficient.

[0090] According to the flow path switching component 100 of this utility model embodiment, by setting multiple one-way valves 1 and integrating the multiple one-way valves 1 into one component, the number of pipe welding points is reduced, the cost is lowered, and a fixed refrigerant flow direction is achieved. Furthermore, based on the flow path switching, no control logic program or electric control is required, making operation convenient and energy-saving. Moreover, by using the aforementioned one-way valve 1, the range of motion of the valve core 13 within the valve cavity 121 can be limited, reducing the abnormal noise from the rotation and vibration of the valve core 13, thereby reducing the noise during operation of the one-way valve 1 and improving the user experience.

[0091] In some embodiments of this utility model, such as Figure 7As shown, a first three-way pipe 31 connects the first one-way valve 1a and the second one-way valve 1b. The outlet 111 of the first one-way valve 1a, the valve port 122 of the second one-way valve 1b, and the first interface 21 are connected through the first three-way pipe 31. Specifically, the first three-way pipe 31 has three interconnected connecting parts. The valve body 11 of the first one-way valve 1a is fitted onto one connecting part of the first three-way pipe 31 and welded to it. The valve seat 12 of the second one-way valve 1b is fitted onto another connecting part of the first three-way pipe 31 and welded to it. The opening of the remaining connecting part of the first three-way pipe 31 forms the first interface 21. This facilitates the connection between the first one-way valve 1a and the second one-way valve 1b and facilitates the formation of the first interface 21 between the first one-way valve 1a and the second one-way valve 1b.

[0092] Optionally, the first tee pipe 31 is a T-type tee pipe.

[0093] In some embodiments of this utility model, such as Figure 7 As shown, a second three-way pipe 32 connects the second one-way valve 1b and the third one-way valve 1c. The outlet 111 of the second one-way valve 1b, the outlet 111 of the third one-way valve 1c, and the second interface 22 are connected through the second three-way pipe 32. Specifically, the second three-way pipe 32 has three interconnected connecting parts. The valve body 11 of the second one-way valve 1b is fitted outside one connecting part of the second three-way pipe 32 and welded to the second three-way pipe 32. The valve body 11 of the third one-way valve 1c is fitted outside another connecting part of the second three-way pipe 32 and welded to the second three-way pipe 32. The opening of the remaining connecting part of the second three-way pipe 32 forms the second interface 22. This facilitates the connection between the second one-way valve 1b and the third one-way valve 1c and facilitates the formation of the second interface 22 between the second one-way valve 1b and the third one-way valve 1c.

[0094] Optionally, the second tee pipe 32 is a Y-type tee pipe.

[0095] In some embodiments of this utility model, such as Figure 7As shown, a third three-way pipe 33 connects the third check valve 1c and the fourth check valve 1d. The valve port 122 of the third check valve 1c, the outlet 111 of the fourth check valve 1d, and the third interface 23 are connected through the third three-way pipe 33. Specifically, the third three-way pipe 33 has three interconnected connecting parts. The valve body 11 of the fourth check valve 1d is fitted outside one connecting part of the third three-way pipe 33 and welded to it. The valve seat 12 of the third check valve 1c is fitted outside another connecting part of the third three-way pipe 33 and welded to it. The opening of the remaining connecting part of the third three-way pipe 33 forms the third interface 23. This facilitates the connection between the fourth check valve 1d and the third check valve 1c and facilitates the formation of the third interface 23 between them.

[0096] Optionally, the third tee pipe 33 is a T-type tee pipe.

[0097] In some embodiments of this utility model, such as Figure 7 As shown, a fourth three-way pipe 34 connects the fourth check valve 1d and the first check valve 1a. The valve port 122 of the fourth check valve 1d, the valve port 122 of the first check valve 1a, and the fourth interface 24 are connected through the fourth three-way pipe 34. Specifically, the fourth three-way pipe 34 has three interconnected connecting parts. The valve seat 12 of the fourth check valve 1d is fitted onto one connecting part of the fourth three-way pipe 34 and welded to it. The valve seat 12 of the first check valve 1a is fitted onto another connecting part of the fourth three-way pipe 34 and welded to it. The opening of the remaining connecting part of the fourth three-way pipe 34 forms the fourth interface 24. This facilitates the connection between the fourth check valve 1d and the first check valve 1a and facilitates the formation of the fourth interface 24 between them.

[0098] Optionally, the fourth tee pipe 34 is a Y-type tee pipe.

[0099] To prevent incorrect manufacturing, the interface sizes of the second tee pipe 32 and the fourth tee pipe 34 can be different, as can the interface sizes of the first tee pipe 31 and the third tee pipe 33. Additionally, in Figure 7 In the example shown, the valve cores 13 of the first check valve 1a, the second check valve 1b, the third check valve 1c, and the fourth check valve 1d are limited by the stepped structure of the valve body 11.

[0100] In some embodiments of this utility model, such as Figure 10 and Figure 11As shown, the valve body 11 of the first check valve 1a is directly connected to the valve seat 12 of the second check valve 1b. A third connecting pipe 43 is connected to the valve body 11 of the first check valve 1a, and a first interface 21 is formed at one end of the third connecting pipe 43. This reduces the number of parts, reduces the number of pipe welds, and lowers costs.

[0101] In some embodiments of this utility model, such as Figure 10 and Figure 11 As shown, the valve body 11 of the fourth check valve 1d is directly connected to the valve seat 12 of the third check valve 1c. A fourth connecting pipe 44 is connected to the valve body 11 of the fourth check valve 1d, and a third interface 23 is formed at one end of the fourth connecting pipe 44. This reduces the number of parts, reduces the number of pipe welds, and lowers costs.

[0102] In order to prevent the production of error-proof designs, the interface sizes of the third connector 43 and the fourth connector 44 can be different.

[0103] Optionally, the third nozzle 43 and the fourth nozzle 44 can be made of stainless steel or other metal.

[0104] In some embodiments of this utility model, the valve bodies 11 and valve seats 12 of the multiple one-way valves 1 are made of stainless steel, while the first tee pipe 31, second tee pipe 32, third tee pipe 33, and fourth tee pipe 34 are made of copper, such as copper. Of course, other metals can also be used. The valve bodies 11 and valve seats 12 are directly welded together, and the valve bodies 11 and their corresponding tee pipes are welded together using solder. The connecting pipes in the air conditioning system are generally made of copper, which facilitates the connection of the first tee pipe 31, second tee pipe 32, third tee pipe 33, and fourth tee pipe 34 to the connecting pipes in the air conditioning system.

[0105] Furthermore, the valve body 11 and the corresponding tee pipe are connected by welding with solder, which can be completed in a tunnel furnace. Batch welding can be achieved in a tunnel furnace, allowing multiple weld points to be completed simultaneously, significantly improving production efficiency and reducing costs. After connecting the pipe, the valve body 11 and valve seat 12 can be connected by laser welding, achieving higher welding precision. Only a short period of localized high temperature is needed at the connection point of the valve body 11 and valve seat 12 to directly weld them together, eliminating the need to heat both valve body 11 and valve seat 12 to high temperatures. This reduces the heat transferred from valve body 11 and valve seat 12 to valve core 13, preventing high-temperature deformation of valve core 13 during welding and effectively improving the quality and yield of the one-way valve component 100.

[0106] The welding process of valve body 11 and valve seat 12 eliminates the need for cooling methods such as wrapping the check valve 1 with a wet towel, which helps improve production efficiency. It also eliminates the need to lengthen or enlarge the check valve 1 for wrapping with a wet towel, effectively shortening the length and size of the check valve 1, making its structure more compact and reducing its space occupation.

[0107] In some embodiments of this utility model, such as Figure 7 and Figure 11 As shown, the first tee pipe 31 and the third tee pipe 33 are both T-type tee pipes, and the second tee pipe 32 and the fourth tee pipe 34 are both Y-type tee pipes. The axis of the first check valve 1a coincides with the axis of the second check valve 1b. The axis of the third check valve 1c coincides with the axis of the fourth check valve 1d and is parallel to and spaced apart from the axis of the first check valve 1a. The second tee pipe 32 and the fourth tee pipe 34 are located at both ends of the length direction of the flow path switching assembly. This makes the structure of the flow path switching assembly 100 more compact and reasonable.

[0108] In some embodiments of this utility model, the first one-way valve 1a and the third one-way valve 1c are arranged side by side and spaced apart, and the minimum gap between the outer peripheral surface of the valve shell 11 of the first one-way valve 1a and the outer peripheral surface of the valve shell 11 of the third one-way valve 1c is greater than or equal to 5mm and less than or equal to 10mm.

[0109] When welding the flow path switching assembly 100, the valve seat 12 and the valve body 11 are first welded to the three-way pipe with solder. Then, the valve seat 12 and the valve body 12 of each one-way valve 1 are laser welded. The gap is large enough to ensure that the laser can weld the entire outer periphery and avoid the size parameters of the flow path switching assembly 100 being too large.

[0110] In some embodiments of this utility model, such as Figure 7 As shown, the maximum inner diameter of cavity 131 is D1, the inner diameters of the first three-way pipe 31, the second three-way pipe 32, the third three-way pipe 33, and the fourth three-way pipe 34 are D2, and the minimum inner diameter of valve port 122 is D3, satisfying the condition: D1 > D2 > D3. This reduces the pressure drop when fluid flows through check valve 1.

[0111] In some embodiments of this utility model, such as Figure 10 and Figure 11 As shown, a first connecting pipe 41 is connected between the second three-way pipe 32 and the second one-way valve 1b, and between the second three-way pipe 32 and the third one-way valve 1c. The inner diameter of the end of the first connecting pipe 41 connected to the second three-way pipe 32 is smaller than the inner diameter of the other end. This facilitates the connection between the second three-way pipe 32 and the second one-way valve 1b, and between the second three-way pipe 32 and the third one-way valve 1c.

[0112] The smaller inner diameter end of the first connecting pipe 41 is fitted over one connecting section of the second three-way pipe 32 and welded to it. The larger inner diameter end of the first connecting pipe 41 is located inside the valve body 11 of the second one-way valve 1b or the third one-way valve 1c and welded to it. The valve core 13 in the second one-way valve 1b and the third one-way valve 1c can be limited by the first connecting pipe 41.

[0113] In some embodiments of this utility model, such as Figure 10 and Figure 11 As shown, a second connecting pipe 42 is connected between the fourth three-way pipe 34 and the first one-way valve 1a, and between the fourth three-way pipe 34 and the fourth one-way valve 1d. The inner diameter of the end of the second connecting pipe 42 connected to the fourth three-way pipe 34 is smaller than the inner diameter of the other end. This facilitates the connection between the fourth three-way pipe 34 and the first one-way valve 1a, and between the fourth three-way pipe 34 and the fourth one-way valve 1d.

[0114] The smaller inner diameter end of the second connecting pipe 42 is fitted outside one connecting part of the fourth three-way pipe 34 and welded to it. The larger inner diameter end of the second connecting pipe 42 is located inside the valve seat 12 of the first one-way valve 1a or the fourth one-way valve 1d and welded to the valve body 11 of the first one-way valve 1a or the valve seat 12 of the fourth one-way valve 1d. The valve core 13 in the first one-way valve 1a and the fourth one-way valve 1d is limited by the stepped surface on the valve body 11.

[0115] In addition, for the purpose of producing a foolproof design, the interface sizes of the first connector 41 and the second connector 42 can be different.

[0116] In some embodiments of this utility model, such as Figure 10 and Figure 11 As shown, the opening 132 is located on the peripheral wall of the column segment 133. The maximum inner diameter of the cavity 131 is B1, the maximum inner diameter of the valve cavity 121 is A1, and the maximum inner diameter of the second connecting pipe 42 is C1, satisfying the condition: A1≥B1≥C1. This can minimize the pressure loss at the valve core 13.

[0117] In some embodiments of this utility model, such as Figure 7 and Figure 11 As shown, the dimension of the flow path switching assembly 100 is E along the axial direction of the first one-way valve 1a, and the dimension of the flow path switching assembly 100 is F along the arrangement direction of the first one-way valve 1a and the fourth one-way valve 1d, satisfying that E≥F. This makes the structure of the flow path switching assembly 100 more compact and reasonable, saving the arrangement space and material cost of the flow path switching assembly 100.

[0118] Optionally, along the axial direction of the first check valve 1a, the dimension E of the flow path switching assembly 100 satisfies: 180mm ≥ E ≥ 100mm. This facilitates the arrangement of multiple check valves 1 and makes the structure of the flow path switching assembly 100 more compact and reasonable.

[0119] Optionally, along the arrangement direction of the first check valve 1a and the fourth check valve 1d, the dimension F of the flow path switching assembly 100 satisfies: 35mm ≥ F ≥ 60mm. This facilitates the arrangement of multiple check valves 1 and helps to make the structure of the flow path switching assembly 100 more compact and reasonable.

[0120] In some embodiments of this utility model, such as Figure 11 As shown, the angle between the axis of the first port 21 and the axis of the first check valve 1a is greater than or equal to the angle between the axis of the first port 21 and the axis of the second check valve 1b. The angle between the axis of the third port 23 and the axis of the third check valve 1c is less than or equal to the angle between the axis of the third check valve 1d and the axis of the fourth check valve 1d. This allows the first port 21 and the third port 23 to be tilted towards the conduction direction of the second and third check valves, reducing the refrigerant flow resistance.

[0121] In some embodiments of this utility model, the flow path switching assembly 100 further includes a throttling device, a connecting pipe, and a heat transfer pipe. The two ends of the heat transfer pipe are respectively connected to the second interface 22 and one end of the throttling device, and the two ends of the connecting pipe are respectively connected to the fourth interface 24 and the other end of the throttling device. The heat transfer pipe is used for heat transfer connection with electronic components. This enables heat dissipation for the electronic components. The heat transfer pipe can be housed within the module heat sink described below.

[0122] In some embodiments of this invention, the flow path switching assembly 100 further includes a first filter and a second filter. The first filter is connected to the first interface 221, and the second filter is connected to the third interface 23. This filters out impurities entering the flow path switching assembly 100, preventing them from entering the one-way valve 1 and affecting its movement.

[0123] The following describes an air conditioning system according to an embodiment of the present invention.

[0124] The air conditioning system according to an embodiment of the present invention includes the flow path switching component 100 described above.

[0125] The air conditioning system may also include a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, and a throttling device. The compressor has an exhaust port and a return port. The four-way valve has a first port, a second port, a third port, and a fourth port. The first port is connected to one of the second and fourth ports, and the third port is connected to the other of the second and fourth ports. The exhaust port is connected to the first port, and the return port is connected to the third port. One end of the indoor heat exchanger is connected to the second port, and one end of the outdoor heat exchanger is connected to the fourth port. The first interface 21 is connected to the other end of the indoor heat exchanger, and the third interface 23 is connected to the other end of the outdoor heat exchanger. The second interface 22 and the fourth interface 24 are connected. The throttling device is located between the second interface 22 and the fourth interface 24. Additionally, a modular radiator for cooling the electrical control box may be installed between the second interface 22 and the fourth interface 24, and the throttling device is located between the modular radiator and the fourth interface 24.

[0126] like Figure 8 As shown, during the specific operation of the air conditioning system, when the system is in cooling mode, the compressor compresses the refrigerant into a high-temperature, high-pressure gas. The high-pressure gaseous refrigerant flows to the outdoor heat exchanger through the compressor's exhaust port, the first port of the four-way valve, and the fourth port. The outdoor heat exchanger can exchange heat with the external environment and dissipate heat through condensation. The refrigerant flows within the outdoor heat exchanger and releases heat to the external environment, thus changing from a gaseous state to a liquid state. Then, the high-pressure liquid refrigerant flowing out of the outdoor heat exchanger enters the flow path switching module through the third port 23. At this time, the third one-way valve 1c controls the connection between the second port 22 and the third port 23, allowing the refrigerant to flow from the third port 23 to the second port 22. The refrigerant flows from the second port 22 through the module radiator and exchanges heat with the electrical control box, and then flows to the throttling device. The throttling device can reduce the pressure of the refrigerant, and then the low-pressure liquid refrigerant returns to the flow path switching module through the fourth port 24.

[0127] At this time, the first one-way valve 1a controls the connection between the first port 21 and the fourth port 24, the second one-way valve 1b controls the disconnection between the second port 22 and the first port 21, and the fourth one-way valve 1d controls the disconnection between the fourth port 24 and the third port 23. Thus, the refrigerant flows from the fourth port 24 through the first one-way valve 1a and out of the first port 21, switching the flow path and flowing to the indoor heat exchanger. The indoor heat exchanger absorbs heat, and the refrigerant vaporizes inside, changing from a liquid to a gaseous state. This carries away the heat from the airflow passing over the surface of the indoor heat exchanger, and the low-temperature airflow is delivered into the room by the indoor unit to achieve cooling. Simultaneously, the low-pressure gaseous refrigerant flows to the second port of the four-way valve and then from the third port to the return port to return to the compressor for further compression, thus forming a refrigerant cycle and achieving the cooling effect of the air conditioning system.

[0128] Similarly, such as Figure 9As shown, when the air conditioning system is in heating mode, the compressor compresses the refrigerant into a high-temperature, high-pressure gas. The high-pressure gaseous refrigerant flows through the compressor's exhaust port, the first port and the second port of the four-way valve to the indoor heat exchanger. The indoor heat exchanger exchanges heat with the airflow flowing across its surface. The airflow absorbs heat, and the refrigerant condenses and dissipates heat. The high-temperature airflow is then delivered into the room by the indoor unit to achieve the purpose of heating. The refrigerant flows within the indoor heat exchanger and releases heat into the indoor environment, thus changing from a gaseous state to a liquid state. The high-pressure liquid refrigerant flowing out of the indoor heat exchanger then enters the flow path switching module through the first port 21. At this time, the second one-way valve 1b controls the second port 22 to connect with the first port 21, allowing the refrigerant to flow from the first port 21 to the second port 22. The refrigerant then flows through the module radiator and exchanges heat with the electrical control box through the second port 22, and then flows to the throttling device. The throttling device can reduce the pressure of the refrigerant, and subsequently, the low-pressure liquid refrigerant returns to the flow path switching module through the fourth port 24.

[0129] At this time, the fourth one-way valve 1d controls the connection between the fourth port 24 and the third port 23, the first one-way valve 1a controls the disconnection between the first port 21 and the fourth port 24, and the third one-way valve 1c controls the disconnection between the second port 22 and the third port 23. Thus, the refrigerant flows from the fourth port 24 through the fourth one-way valve 1d and then out of the third port 23 to the flow path switching module and flow to the outdoor heat exchanger. The outdoor heat exchanger absorbs heat. The refrigerant is heated and vaporized inside the outdoor heat exchanger, changing from a liquid to a gaseous state, thereby carrying away the heat flowing through the outdoor environment. The low-pressure gaseous refrigerant flows to the fourth port of the four-way valve and then from the third port to the return port to return to the compressor for compression again, thus forming a refrigerant cycle and achieving the heating effect of the air conditioning system.

[0130] In this embodiment, the refrigerant is reversed by the flow path switching component 100. Whether cooling or heating, the refrigerant first passes through the modular radiator and then through the throttling device, avoiding the problem of condensation in the modular radiator pipes. This enables the modular radiator system to circulate through a single throttling component, reducing costs and improving system reliability.

[0131] According to the air conditioning system of this utility model embodiment, by setting the above-mentioned flow path switching component 100, multiple one-way valves 1 are set and the multiple one-way valves 1 are integrated into one component, reducing pipe welding points, reducing costs, and achieving a fixed refrigerant flow direction. In addition, based on the flow path switching, no control logic program or electric control is required, making operation convenient and energy-saving. Furthermore, by using the above-mentioned one-way valve 1, the range of motion of the valve core 13 within the valve cavity 121 can be limited, reducing the abnormal noise of valve core 13 rotation and vibration, thereby reducing the noise of the one-way valve 1 during operation and improving the user experience.

[0132] The following describes an air conditioner according to an embodiment of the present invention.

[0133] The air conditioner according to an embodiment of the present invention includes the air conditioning system described above.

[0134] According to the embodiment of this utility model, the air conditioner, by setting the above-mentioned air conditioning system, the above-mentioned flow path switching component 100, and multiple one-way valves 1, and integrating the multiple one-way valves 1 into one component, reduces pipe welding points, lowers costs, and achieves a fixed refrigerant flow direction. Furthermore, based on the flow path switching, no control logic program or electric control is required, making operation convenient and energy-saving. Moreover, by using the above-mentioned one-way valves 1, the range of motion of the valve core 13 within the valve cavity 121 can be limited, reducing the abnormal noise of valve core 13 rotation and vibration, thereby reducing the noise of the one-way valve 1 during operation and improving the user experience.

[0135] In some embodiments of this utility model, the refrigerant charged in the air conditioner is R32 refrigerant. The flow path switching assembly 100 is arranged vertically or at an angle. The second interface 22 is located at the upper end of the flow path switching assembly 100, and the fourth interface 24 is located at the lower end of the flow path switching assembly 100. The weight of the valve core 13 in the flow path switching assembly 100 is less than or equal to 5g, and the minimum opening pressure difference of the valve core 13 is less than or equal to 0.01MPa. This allows the valve port 122 to be sealed under the gravity of the valve core 13, and also facilitates opening the valve port 122 by overcoming the gravity of the valve core 13, thus preventing the valve core 13 from moving up and down and causing noise.

[0136] Other components and operations of the air conditioner according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0137] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0138] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A one-way valve, characterized in that, include: A valve housing, wherein an outlet is provided at one axial end of the valve housing; A valve seat is connected to one axial end of the valve housing opposite to the outlet and together they form a valve cavity. The valve seat is provided with a valve port, and the valve port and the outlet communicate with the valve cavity. A valve core is movably disposed within the valve cavity to open or close the valve port. The valve core has a cavity that opens towards the outlet. The valve core has an opening communicating with the cavity and the valve cavity. The minimum single-sided gap between the outer peripheral wall of the valve core and the inner peripheral wall of the valve cavity is less than or equal to 0.2 mm; or the sum of the minimum double-sided gaps between the outer peripheral wall of the valve core and the inner peripheral wall of the valve cavity is less than or equal to 0.4 mm.

2. The one-way valve according to claim 1, characterized in that, The valve core includes: The column segment, along the axial direction of the valve port, has a constant outer diameter or the difference between the maximum and minimum outer diameter of the column segment is less than or equal to 0.5 mm; A tapered section, one end of which is connected to the end of the column section opposite to the outlet, gradually decreases in outer diameter in the direction from the outlet to the valve port. The tapered section is used to block or open the valve port. At least a portion of the opening is provided on the tapered section. When the tapered section blocks the valve port, a portion of the tapered section extends into the valve port. The opening is located on the side of the valve port facing the outlet or on the side of the valve port facing the outlet at the point where the tapered section abuts the outlet.

3. The one-way valve according to claim 2, characterized in that, The minimum radius of the end of the tapered section away from the column section is R. Along the axial direction of the valve port, the travel of the valve core is L2, and it satisfies: R≤L2.

4. The one-way valve according to claim 1, characterized in that, The openings are multiple and spaced apart. On the projection plane perpendicular to the valve port axis, the projection patterns of the multiple openings are axisymmetric or centrally symmetric.

5. The check valve according to any one of claims 1-4, characterized in that, The check valve is made of stainless steel; and / or The valve housing is made of stainless steel; and / or The valve seat is made of stainless steel; and / or The valve core is made of stainless steel.

6. The check valve according to any one of claims 1-4, characterized in that, The valve core is made of metal and its weight is less than or equal to 5g; and / or The angle between the axis of the valve core and the vertical direction is 0-15°; and / or The minimum opening pressure difference of the one-way valve or the valve core is ≤0.01MPa; and / or The valve core is made of stainless steel, and the wall thickness of the valve core is 0.3mm-0.8mm; and / or The maximum outer diameter of the valve core is 5mm-20mm; and / or The length of the valve core is 8mm-25mm.

7. The one-way valve according to claim 2 or 3, characterized in that, The difference between the inner diameter of the valve cavity and the outer diameter of the column segment is less than or equal to 0.4 mm; and / or The ratio of the length of the column segment to the difference between the inner diameter of the valve cavity and the outer diameter of the column segment is greater than or equal to 15; and / or The ratio of the length of the column segment to the length of the tapered segment is greater than or equal to 1 and less than or equal to 3.

8. The check valve according to any one of claims 1-4, characterized in that, The valve housing includes a receiving portion, a connecting portion, and an outlet portion connected in sequence. The valve core is movably disposed in the receiving portion. The outlet portion has the outlet. The inner diameter of the outlet portion is smaller than the inner diameter of the receiving portion. The connecting portion connects the receiving portion and the outlet portion and is used to restrict the movement of the valve core.

9. The check valve according to any one of claims 1-4, characterized in that, The outer peripheral surface of the valve seat near one end of the valve housing has a mounting groove, and the valve housing is fitted over the mounting groove and surrounds the valve port; and / or The outer peripheral surface of the valve housing is flush with the outer peripheral surface of the valve seat.

10. The check valve according to any one of claims 1-4, characterized in that, The valve seat has an insertion hole formed on its inner circumferential surface at the end away from the valve housing. The inner diameter of the insertion hole is larger than the inner diameter of the valve port. The insertion hole is used to connect to a connecting pipe. The inner diameter of the insertion hole is larger than the outer diameter of the valve core; and / or The inner diameter of the connecting pipe is greater than or equal to the inner diameter of the valve port.

11. A flow path switching component, characterized in that, include: The check valve according to any one of claims 1-10, wherein there are multiple check valves, including a first check valve, a second check valve, a third check valve, and a fourth check valve, wherein the first check valve, the second check valve, the third check valve, and the fourth check valve are connected end-to-end in sequence, a first interface is provided between the first check valve and the second check valve, a second interface is provided between the second check valve and the third check valve, a third interface is provided between the third check valve and the fourth check valve, and a fourth interface is provided between the fourth check valve and the first check valve. The first one-way valve is unidirectionally connected from the fourth interface to the first interface, the second one-way valve is unidirectionally connected from the first interface to the second interface, the third one-way valve is unidirectionally connected from the third interface to the second interface, and the fourth one-way valve is unidirectionally connected from the fourth interface to the third interface.

12. The flow path switching component according to claim 11, characterized in that, A first three-way pipe is connected between the first one-way valve and the second one-way valve, and the outlet of the first one-way valve, the valve port of the second one-way valve, and the first interface are connected through the first three-way pipe; And / or, a second three-way pipe is connected between the second one-way valve and the third one-way valve, and the outlet of the second one-way valve, the outlet of the third one-way valve and the second interface are connected through the second three-way pipe; And / or, a third three-way pipe is connected between the third one-way valve and the fourth one-way valve, and the valve port of the third one-way valve, the outlet of the fourth one-way valve and the third interface are connected through the third three-way pipe; And / or, a fourth three-way pipe is connected between the fourth one-way valve and the first one-way valve, and the valve port of the fourth one-way valve, the valve port of the first one-way valve, and the fourth interface are connected through the fourth three-way pipe.

13. The flow path switching component according to claim 12, characterized in that, The valve bodies and valve seats of the plurality of one-way valves are made of stainless steel, and the first tee pipe, the second tee pipe, the third tee pipe and the fourth tee pipe are made of copper. The valve bodies and valve seats are directly welded together, and the valve bodies and the corresponding tee pipes are welded together with solder.

14. The flow path switching component according to claim 12, characterized in that, The first and third three-way pipes are both T-type three-way pipes, and the second and fourth three-way pipes are both Y-type three-way pipes. The axis of the first check valve and the axis of the second check valve coincide. The axis of the third check valve and the axis of the fourth check valve coincide and are parallel to and spaced apart from the axis of the first check valve. The second and fourth three-way pipes are located at both ends of the length direction of the flow path switching assembly.

15. The flow path switching component according to claim 11, characterized in that, The first check valve and the third check valve are arranged side by side and spaced apart. The minimum gap between the outer peripheral surface of the valve body of the first check valve and the outer peripheral surface of the valve body of the third check valve is greater than or equal to 5 mm and less than or equal to 10 mm.

16. The flow path switching component according to claim 12, characterized in that, The maximum inner diameter of the cavity is D1, the inner diameters of the first tee pipe, the second tee pipe, the third tee pipe and the fourth tee pipe are D2, and the minimum inner diameter of the valve port is D3, and the following conditions are met: D1 > D2 > D3.

17. An air conditioning system, characterized in that, Includes the flow path switching component according to any one of claims 11-16.

18. An air conditioner, characterized in that, Including the air conditioning system according to claim 17.

Images