one-way valve

Abstract

The utility model provides a check valve, including valve pipe, valve seat, baffle ring and valve core, valve seat is embedded in the valve pipe, the fluid passage that is formed with along its axial through its both ends in valve seat, baffle ring is embedded in the first end of fluid passage, the second end of fluid passage forms the valve seat mouth, the fluid passage between valve seat mouth and baffle ring is first flow passage section, the lateral through -hole that forms along the radial of valve pipe through the inside and outside of valve seat on first flow passage section, the valve core is in first flow section and has the cutting position of closing valve seat mouth and the lead -through position of intercommunication valve seat mouth and lateral through -hole, the end of valve core towards baffle ring is tail end, tail end has the first outer conical section, the inner ring wall surface of baffle ring has the first inner conical section, the taper surface cooperation is formed between the first outer conical section and the first inner conical section, and the taper surface cooperation taper surface generatrix length is not less than 2mm. The utility model discloses simple structure, and the manufacturing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning system design technology, specifically to a noise-reducing one-way valve. Background Technology

[0002] A check valve is a valve that allows fluid to flow in one direction and is widely used in various flow systems, such as refrigeration system circuits. Existing check valves commonly used in air conditioning refrigeration system circuits generate eddies during refrigerant flow, causing the valve core to rotate within the valve body. This rotation creates friction between the valve core and the inner wall of the valve body, resulting in noise and reducing user comfort.

[0003] To overcome the aforementioned shortcomings of the prior art, the invention utility model patent CN114593245A discloses a valve core anti-rotation noise-reducing one-way valve, a noise reduction method, and its application. It restricts the rotation of the valve core by setting ridges on the valve core and anti-rotation arms on the retaining ring, and the circumferential staggered cooperation between the ridges and the anti-rotation arms effectively prevents the rotation of the valve core, thereby eliminating the phenomenon of noise generated by the rotation of the valve core during the use of the one-way valve. However, the structure of this type of one-way valve is relatively complex and the manufacturing cost is relatively high. Utility Model Content

[0004] This utility model provides a one-way valve to overcome the technical shortcomings of existing one-way valves, which have a complex structure and relatively high manufacturing cost due to the structure of the valve core being provided with a ridge on the valve core and an anti-rotation arm on the retaining ring, and the anti-rotation arm and the ridge being staggered in the circumferential direction to prevent the valve core from rotating and generating noise.

[0005] The purpose of this utility model is to provide a one-way valve, including a valve tube, a valve seat, a retaining ring, and a valve core. The valve seat is embedded in the valve tube, and a fluid channel is formed in the valve seat, extending through both ends along its axial direction. The retaining ring is embedded in the first end of the fluid channel, and a valve seat port is formed in the second end of the fluid channel. The fluid channel between the valve seat port and the retaining ring is a first flow channel segment. A side through hole is formed on the first flow channel segment, extending radially through the inside and outside of the valve seat. The valve core is located in the first flow segment and has a cut-off position that closes the valve seat port and a conduction position that connects the valve seat port and the side through hole. The end of the valve core facing the retaining ring is a tail end, and the tail end has a first outer conical segment. The inner ring wall of the retaining ring has a first inner conical segment. A conical surface fit is formed between the first outer conical segment and the first inner conical segment, and the generatrix length of the conical surface fit is not less than 2 mm.

[0006] In some embodiments, the tail end further has an outer cylindrical section, which is located on the side of the first outer conical section away from the valve seat opening. The inner ring wall of the retaining ring also has an inner cylindrical section, which is located on the side of the first inner conical section away from the valve seat opening. The inner cylindrical section and the outer cylindrical section are fitted together to form a cylindrical surface fit.

[0007] In some embodiments, the end of the valve core facing the valve seat port is the head end. When the valve core is in the conducting position, the minimum distance between the head end and the valve seat port in the axial direction of the valve core is less than the maximum distance between the wall of the side through hole and the valve seat port, and the minimum distance between the head end and the valve seat port in the axial direction of the valve core is greater than the minimum distance between the wall of the side through hole and the valve seat port.

[0008] In some embodiments, the cross-section of the valve core at its head end decreases along the axial outer diameter near the valve seat port.

[0009] In some embodiments, the head end has a second outer conical segment.

[0010] In some embodiments, the cone angle of the second outer conical segment is 30° to 60°.

[0011] In some embodiments, the cone angle of the second outer conical segment is 30° to 40°.

[0012] In some embodiments, when the valve core is in the cut-off position, the edge of the valve seat opening abuts against the second outer conical segment.

[0013] In some embodiments, the edge of the valve seat port is rounded.

[0014] In some embodiments, the head end further has a third outer conical segment or a hemisphere, the third outer conical segment or hemisphere being located on the side of the second outer conical segment away from the retaining ring and being continuously arranged with the second outer conical segment, the cone angle of the third outer conical segment being greater than the cone angle of the second outer conical segment.

[0015] This utility model discloses a one-way valve. By forming the tail end of the valve core into a first outer conical segment and the inner wall of the retaining ring into a first inner conical segment, a sufficiently long conical surface fit is formed between the first outer conical segment and the first inner conical segment when the valve core is in the conducting position. This results in a large static friction force between the valve core and the retaining ring, which effectively prevents the valve core from rotating under the disturbance of the flowing fluid. This effectively prevents the noise generated by the rotation of the valve core and improves user comfort. Compared with the existing anti-rotation structure design using anti-rotation arms or other anti-rotation structures, this utility model uses the friction force formed by the conical surface fit to prevent the valve core from rotating. It has a simple structure and low manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram (longitudinal section) of the internal structure of the one-way valve of this utility model in one embodiment, in which the valve core is in the conducting position;

[0017] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the valve core when it is in the cut-off position;

[0018] Figure 3 This is a schematic diagram (longitudinal section) of the internal structure of the one-way valve of this utility model in another embodiment, in which the valve core is in the conducting position;

[0019] Figure 4 yes Figure 3 A schematic diagram of the internal structure of the valve core when it is in the cut-off position.

[0020] In the picture:

[0021] 1. Valve pipe; 2. Valve seat; 21. Fluid passage; 22. Side through hole; 3. Retaining ring; 31. First inner conical section; 32. Inner cylindrical section; 4. Valve core; 41. First outer conical section; 42. Outer cylindrical section; 43. Second outer conical section; 44. Third outer conical section. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. In the drawings, for clarity, the thickness of regions and layers is exaggerated. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0023] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0024] The following example describes a one-way valve of this utility model. This example is only a part of the embodiments of this utility model, but the protection scope of this utility model is not limited thereto. All other embodiments obtained by those skilled in the art without inventive effort should be covered within the protection scope of this utility model.

[0025] Please refer to the reference. Figures 1 to 4 As shown, according to an embodiment of the present invention, a one-way valve is provided, including a valve tube 1, a valve seat 2, a retaining ring 3, and a valve core 4. The valve seat 2 is embedded in the valve tube 1, and a axial direction (i.e., axial direction) is formed within the valve seat 2. Figure 1 A fluid channel 21 extending through both ends (in the left-right direction shown) is provided, and a retaining ring 3 is fitted into the first end of the fluid channel 21 (i.e., the left-right direction shown). Figure 1 Within the fluid channel 21 (shown at the right end), a valve seat port (not labeled in the figure) is formed at the second end. The fluid channel 21 between the valve seat port and the retaining ring 3 is the first flow channel section (not labeled in the figure). A side through hole 22 is formed on the first flow channel section, extending radially through the inside and outside of the valve seat 2. Preferably, multiple side through holes 22 are provided, and the multiple side through holes 22 are evenly spaced around the circumference of the valve seat 2. The valve core 4 is located within the first flow section and has a cut-off position that closes the valve seat port (e.g., Figure 2 and Figure 4 (as shown) and the connection position between the valve seat port and the side through hole 22 (as shown) Figure 1 and Figure 3 As shown), the end of the valve core 4 facing the retaining ring 3 is the tail end (i.e. Figure 1 (The right end of the indicated orientation) has a first outer conical section 41 at the tail end, and the inner ring wall of the retaining ring 3 has a first inner conical section 31. The first outer conical section 41 and the first inner conical section 31 form a conical surface fit, and the generatrix length of the conical surface fit is not less than 2mm.

[0026] In this technical solution, by forming the tail end of the valve core 4 into a first outer conical section 41 and the inner wall of the retaining ring 3 into a first inner conical section 31, a sufficiently long conical surface fit is formed between the first outer conical section 41 and the first inner conical section 31 when the valve core 4 is in the conducting position. This results in a large static friction force between the valve core 4 and the retaining ring 3, which can effectively prevent the valve core 4 from rotating under the disturbance of the flowing fluid. This effectively prevents the noise generated by the rotation of the valve core 4 and improves user comfort. Compared with the design scheme of anti-rotation arm and other anti-rotation structures in the prior art, this utility model uses the friction force formed by the conical surface fit to prevent the valve core 4 from rotating. The structure is simple and the manufacturing cost is low.

[0027] In some implementation methods, see details. Figure 3 and Figure 4As shown, the tail end also has an outer cylindrical section 42, which is located on the side of the first outer conical section 41 away from the valve seat opening. The inner ring wall of the retaining ring 3 also has an inner cylindrical section 32, which is located on the side of the first inner conical section 31 away from the valve seat opening. The inner cylindrical section 32 and the outer cylindrical section 42 are fitted together to form a cylindrical surface fit.

[0028] In this technical solution, the axial movement of the valve core 4, i.e., the position switching, is reliably guided by the cooperation of the inner cylindrical section 32 and the outer cylindrical section 42, preventing the axis of the valve core 4 from tilting during the movement, thereby ensuring that the conical surfaces of the aforementioned first outer conical section 41 and the first inner conical section 31 are in complete contact.

[0029] See details Figure 1 As shown, in some embodiments, the end of the valve core 4 facing the valve seat is the head end. When the valve core 4 is in the conducting position, the minimum axial distance between the head end and the valve seat is less than the maximum distance between the wall of the side through hole 22 and the valve seat, and the minimum axial distance between the head end and the valve seat is greater than the minimum distance between the wall of the side through hole 22 and the valve seat, that is, with Figure 1 The orientation shown is for reference. When the valve core 4 is in the open position, the head end of the valve core 4 extends into and is in the upper and lower open path of the side through hole 22. This can increase the axial force of the fluid flowing in this state on the valve core 4, so that the valve core 4 can fit more reliably and stably with the retaining ring 3, and prevent the impact noise caused by the valve core 4 reciprocating in the axial direction.

[0030] In some embodiments, the cross-section of the valve core 4 at its head end gradually decreases in size along the axial direction of the outer diameter near the valve seat port, thereby reducing the flow resistance of the valve core 4 to the fluid. As a preferred embodiment, the head end has a second outer conical section 43, which guides the fluid flowing out of the valve seat port through the second outer conical section 43 to the through-hole 22, further reducing the flow resistance of the fluid.

[0031] In some embodiments, the cone angle of the second outer conical segment 43 is 30° to 60°, such as... Figure 1 As shown in the figure, A is further between 30° and 40°.

[0032] In some embodiments, when the valve core 4 is in the cut-off position, the edge of the valve seat port abuts against the second outer conical section 43. That is, when the valve core 4 is in the cut-off position, a line contact is formed between the valve seat port and the second outer conical section 43, which achieves a line seal and improves the reverse shut-off performance of the one-way valve in the cut-off position.

[0033] To prevent impact damage to the valve core 4 that may result from sharp-angle contact, in some embodiments, the edge of the valve seat orifice is rounded.

[0034] In some embodiments, the head end also has a third outer conical section 44 or a hemisphere (not shown). The third outer conical section 44 or the hemisphere is located on the side of the second outer conical section 43 away from the retaining ring 3 and is continuously arranged with the second outer conical section 43. The cone angle of the third outer conical section 44 is greater than the cone angle of the second outer conical section 43, which can reduce the total axial length of the valve core 4, thereby guiding the fluid and reducing the flow resistance.

[0035] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A one-way valve, characterized in that, The valve includes a valve tube (1), a valve seat (2), a retaining ring (3), and a valve core (4). The valve seat (2) is fitted inside the valve tube (1). A fluid channel (21) is formed inside the valve seat (2) and extends through both ends of the valve along its axial direction. The retaining ring (3) is fitted inside the first end of the fluid channel (21). A valve seat opening is formed inside the second end of the fluid channel (21). The fluid channel (21) between the valve seat opening and the retaining ring (3) is a first flow channel segment. A valve core (4) is formed on the first flow channel segment that extends radially through the valve tube (1) and through the valve seat. 2) The inner and outer side through holes (22) of the valve core (4) are located in the first flow section and have a cut-off position that closes the valve seat port and a conduction position that connects the valve seat port and the side through hole (22). The end of the valve core (4) facing the retaining ring (3) is the tail end. The tail end has a first outer conical section (41). The inner ring wall of the retaining ring (3) has a first inner conical section (31). The first outer conical section (41) and the first inner conical section (31) form a conical surface fit, and the generatrix length of the conical surface fit is not less than 2mm.

2. The one-way valve according to claim 1, characterized in that, The tail end also has an outer cylindrical section (42), which is located on the side of the first outer conical section (41) away from the valve seat opening. The inner ring wall of the retaining ring (3) also has an inner cylindrical section (32), which is located on the side of the first inner conical section (31) away from the valve seat opening. The inner cylindrical section (32) and the outer cylindrical section (42) are fitted together to form a cylindrical surface fit.

3. The one-way valve according to claim 1, characterized in that, The end of the valve core (4) facing the valve seat is the head end. When the valve core (4) is in the conducting position, the minimum distance between the head end and the valve seat in the axial direction of the valve core (4) is less than the maximum distance between the wall of the side through hole (22) and the valve seat. The minimum distance between the head end and the valve seat in the axial direction of the valve core (4) is greater than the minimum distance between the wall of the side through hole (22) and the valve seat.

4. The one-way valve according to claim 3, characterized in that, The cross-section of the head end of the valve core (4) decreases in size along the axial direction of the outer diameter near the valve seat port.

5. The one-way valve according to claim 4, characterized in that, The head end has a second outer conical section (43).

6. The one-way valve according to claim 5, characterized in that, The cone angle of the second outer conical segment (43) is 30° to 60°.

7. The one-way valve according to claim 6, characterized in that, The cone angle of the second outer conical segment (43) is 30° to 40°.

8. The one-way valve according to claim 5, characterized in that, When the valve core (4) is in the cut-off position, the edge of the valve seat port abuts against the second outer conical section (43).

9. The one-way valve according to claim 8, characterized in that, The valve seat opening has a rounded edge.

10. The one-way valve according to claim 5, characterized in that, The head end also has a third outer conical segment (44) or a hemisphere, the third outer conical segment (44) or the hemisphere being located on the side of the second outer conical segment (43) away from the retaining ring (3) and being continuously arranged with the second outer conical segment (43), the cone angle of the third outer conical segment (44) being greater than the cone angle of the second outer conical segment (43).

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