Valve seat and electronic expansion valve having the same

Abstract

The valve seat (10) has a first end and a second end provided opposite to each other, a first storage chamber (30) is provided within the valve seat (10), a fluid opening (40) is provided on a side surface of the valve seat (10), a buffer recess (20) is provided on an inner wall of the first storage chamber (30), the buffer recess (20) is provided corresponding to the fluid opening (40), a valve port (50) is provided at the second end of the valve seat (10), the valve port (50) is connected to the first storage chamber (30), and the valve port (50) is connected to a first segment (51), a second segment (52), and a third segment (53) provided in this order. A valve seat (10), and an electronic expansion valve having the same, comprising: a first segment (51) disposed adjacent to a first storage chamber (30), a diameter of the second segment (52) being larger than that of the first segment (51), a diameter of one end of the third segment (53) close to the second segment (52) being larger than that of the second segment (52), and the diameter of the third segment (53) gradually increasing from the first end of the valve seat (10) toward the second end of the valve seat (10). The present technical aspect is used to solve the problem of high noise in electronic expansion valves in the prior art.

Description

[Technical field]

[0001] This application claims priority to a patent application filed with the China National Intellectual Property Office on January 26, 2022, bearing application number 202220236796.0 and titled "Valve seat and electronic expansion valve having the same."

[0002] The present application relates to the technical field of valve control, and in particular to a valve seat and an electronic expansion valve having the same. [Background technology]

[0003] In the process of use, the electronic expansion valve generates a large amount of noise when the fluid flows into the chamber of the electronic expansion valve and then flows out from the valve port. In the prior art, the noise caused by the fluid is usually reduced by adjusting the structure of the valve port, but the noise generated by the fluid in the chamber is still large, and the noise generated by the entire electronic expansion valve cannot be sufficiently reduced. Summary of the Invention

[0004] The present application provides a valve seat and an electronic expansion valve having the same, to solve the problem of high noise in the electronic expansion valve in the prior art.

[0005] According to one aspect of the present application, there is provided a valve seat having a first end and a second end arranged opposite to each other, a first storage chamber is provided within the valve seat, a fluid opening is provided on a side surface of the valve seat, a buffer recess is provided on an inner wall of the first storage chamber, the buffer recess is provided corresponding to the fluid opening, a valve port is provided at the second end of the valve seat, the valve port is connected to the first storage chamber, the valve port includes a first segment, a second segment and a third segment arranged in sequence, the first segment is provided adjacent to the first storage chamber, a diameter of the second segment is larger than a diameter of the first segment, a diameter of one end of the third segment close to the second segment is larger than a diameter of the second segment, and a diameter of the third segment gradually increases from the first end of the valve seat to the second end of the valve seat.

[0006] When the technical aspects of the present application are applied, a buffer recess is provided on the inner wall of the first storage chamber, and the buffer recess is provided opposite the fluid opening. As a result, when the fluid flows from the fluid opening into the first storage chamber, the fluid flows along the inner wall of the buffer recess to the valve opening, and the flow rate of the fluid decreases, thereby preventing the fluid from colliding with the inner wall of the first storage chamber and generating a large noise. The valve opening includes a first segment, a second segment, and a third segment, and the diameter of the third segment gradually increases from the first end of the valve seat to the second end of the valve seat, thereby reducing the difference in diameter between the first segment and the second segment, and the difference between the diameter of the second segment and the diameter of one end of the third segment close to the second segment is reduced. As a result, when the fluid flows through the valve opening, vortices generated at the connection point between the first segment and the second segment and the connection point between the second segment and the third segment can be reduced, and further, the noise generated when the fluid flows through the valve opening can be reduced. The above technical aspects not only reduce the fluid noise in the first chamber, but also reduce the fluid noise in the valve port, thereby significantly reducing the fluid noise generated in the electronic expansion valve and improving the user experience.

[0007] Furthermore, the buffer recess includes a first buffer segment and a second buffer segment connected to each other, the first buffer segment is provided close to the first storage chamber, and the circumferential dimension of the second buffer segment gradually decreases in a direction away from the fluid opening. By providing the first buffer segment, the distance that the fluid flows between the fluid opening and the second buffer segment increases, so that the speed at which the fluid flows to the second buffer segment is reduced, and further, the impact force of the fluid on the second buffer segment is reduced, and the noise caused by the fluid is further reduced.

[0008] Furthermore, the second buffer segment is tapered, the center line of the second buffer segment overlaps with the center line of the fluid opening, and the taper angle of the second buffer segment is α, which ranges from 50° to 160°. By setting α in the range of 50° to 160°, the side wall of the valve seat can be made thinner, and the noise reduction effect of the second buffer segment can be improved.

[0009] Furthermore, the diameter of the first segment is 1 mm to 4 mm. By setting the diameter of the first segment 51 to 1 mm to 4 mm, the flow rate of the fluid flowing out of the valve port can be increased and the volume of the valve seat can be reduced.

[0010] Furthermore, if the diameter of the first segment is A and the diameter of the second segment is B, then B ≥ 1.2A. By making B ≥ 1.2A, noise caused by the fluid can be reduced.

[0011] Furthermore, if the diameter of the second segment is B and the diameter of one end of the third segment close to the first housing chamber is C, then C ≧ 1.2B. By making C ≧ 1.2B, it is possible to further reduce noise caused by the fluid.

[0012] Furthermore, if the length of the first segment is L1, the length of the second segment is L2, and the length of the third segment is L3, then L1 = N * (L2 + L3), where N is between 0.5 and 2. By setting L1 = N * (L2 + L3) and N being between 0.5 and 2, it is possible to reduce noise caused by the fluid and at the same time reduce the volume of the valve seat.

[0013] Furthermore, the length of the first segment is L1, the first storage chamber has a columnar structure, the first buffer segment has a columnar structure, the distance between the end face close to the valve orifice of the first storage chamber and the side wall close to the valve orifice of the first buffer segment is L4, the center line of the first buffer segment overlaps with the center line of the fluid opening, and the length of the first buffer segment is L5, then L1=N*(L4+L5), where N is 0.5 to 2. By setting L1=N*(L4+L5) and N being 0.5 to 2, the flow velocity can be significantly reduced.

[0014] According to another aspect of the present application, there is provided an electronic expansion valve including a valve housing and the above-described valve seat, a second chamber is provided within the valve housing, one end of the valve housing is connected to a first end of the valve seat, and the first chamber is in communication with the second chamber. [Brief description of the drawings]

[0015] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and the description thereof are intended to interpret the application and are not intended to unduly limit the application.

[0016] [Figure 1] 1 shows a structural schematic diagram of a valve seat provided by the present application; [Diagram 2] 1 shows another structural schematic diagram of a valve seat provided by the present application;

[0017] Here, the above drawings include the following reference numbers: 10 valve seat, 11 first end of valve seat, 12 second end of valve seat, 20 buffer recess, 21 first buffer segment, 22 second buffer segment, 30 first storage chamber, 40 fluid opening, 50 valve port, 51 first segment, 52 second segment, 53 third segment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are merely some of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is actually merely explanatory, and does not impose any restrictions on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0019] As shown in FIG. 1 and FIG. 2 , an embodiment of the present application provides a valve seat having a first end and a second end opposite to each other, a first chamber 30 is provided in the valve seat 10, a fluid opening 40 is provided on a side of the valve seat 10, a buffer recess 20 is provided on an inner wall of the first chamber 30, the buffer recess 20 is provided corresponding to the fluid opening 40, a valve port 50 is provided at the second end 12 of the valve seat, the valve port 50 communicates with the first chamber 30, the valve port 50 includes a first segment 51, a second segment 52 and a third segment 53 arranged in sequence, the first segment 51 is arranged close to the first chamber 30, the diameter of the second segment 52 is larger than the diameter of the first segment 51, the diameter of one end of the third segment 53 close to the second segment 52 is larger than the diameter of the second segment 52, and the diameter of the third segment 53 gradually increases from the first end 11 of the valve seat to the second end 12 of the valve seat.

[0020] When the technical aspect of the present application is applied, the buffer recess 20 is provided on the inner wall of the first storage chamber 30, and the buffer recess is provided opposite the fluid opening 40. Therefore, when the fluid flows from the fluid opening 40 into the first storage chamber 30, the fluid flows along the inner wall of the buffer recess 20 to the valve opening 50, and the flow rate of the fluid is reduced, so that it is possible to prevent the fluid from colliding with the inner wall of the first storage chamber 30 and generating a large noise. The valve opening 50 includes a first segment 51, a second segment 52, and a third segment 53, and the diameter of the third segment 53 is By gradually increasing the diameter from the first end 11 of the valve seat to the second end 12 of the valve seat, the difference in diameter between the first segment and the second segment 52 is reduced, and the difference in diameter between the second segment and one end of the third segment 53 close to the second segment 52 is reduced, so that when the fluid flows through the valve port 50, the vortex generated at the connection point between the first segment 51 and the second segment 52 and the connection point between the second segment 52 and the third segment 53 can be reduced, and further, the noise generated when the fluid flows through the valve port 50 can be reduced. By using the above technical aspect, not only the noise caused by the fluid in the first housing chamber 30 is reduced, but also the noise caused by the fluid in the valve port 50 is reduced, so that the noise caused by the fluid generated in the electronic expansion valve can be significantly reduced and the user's experience can be improved.

[0021] Specifically, the buffer recess 20 includes a first buffer segment 21 and a second buffer segment 22 connected to each other, the first buffer segment 21 being provided close to the first storage chamber 30, and the circumferential dimension of the second buffer segment 22 gradually decreasing in a direction away from the fluid opening 40. By providing the first buffer segment 21, the distance that the fluid flows between the fluid opening 40 and the second buffer segment 22 increases, so that the speed at which the fluid flows to the second buffer segment 22 is reduced, and furthermore, the impact force of the fluid on the second buffer segment 22 is reduced, and noise caused by the fluid is further reduced. By gradually decreasing the circumferential dimension of the second buffer segment 22 in a direction away from the fluid opening 40, the fluid can flow along the inner wall of the second buffer segment 22 toward the valve opening 50, so that it is possible to prevent the fluid from flowing backward and generating noise after colliding with the second buffer segment 22. In addition, by doing so, the flow speed of the fluid can be reduced, and therefore noise caused by the fluid can be reduced. Optionally, the sidewall of the second buffer segment 22 may have a structure such as an arcuate surface, a tapered surface, a combination of an arcuate surface and a tapered surface, a combination of multiple tapered surfaces, or a combination of multiple arcuate surfaces.

[0022] Specifically, the second buffer segment 22 is tapered, and the center line of the second buffer segment 22 overlaps with the center line of the fluid opening 40. If the taper angle of the second buffer segment 22 is α, the range of α is 50° to 160°. Since the second buffer segment 22 is tapered, it is easy and convenient to process. Since the center line of the second buffer segment 22 overlaps with the center line of the fluid opening 40, the flow direction of the fluid flowing from the fluid opening 40 into the first storage chamber 30 faces the second buffer 22, so that most of the fluid flows to the second buffer 22. If α is smaller than 50°, when the diameter of one end of the second buffer segment 22 close to the first storage chamber 30 satisfies the requirements, the length of the second buffer segment 22 becomes large, so that the side wall of the valve seat 10 becomes thick, and further, the volume of the valve seat 10 becomes large. If α is larger than 160°, the buffer effect of the second buffer segment 22 becomes poor, so that the noise caused by the fluid in the first storage chamber 30 becomes large. Therefore, by setting α in the range of 50° to 160°, the side wall of the valve seat 10 can be made thinner, thereby saving material and reducing the volume of the valve seat 10, and improving the noise reduction effect of the second buffer segment 22. Specifically, α is 50°, 60°, 70°, 90°, 110°, 120°, 130°, 160°, etc.

[0023] Specifically, the diameter of the first segment 51 is 1 mm to 4 mm. If the diameter of the first segment 51 is smaller than 1 mm, the flow rate of the fluid flowing out from the valve port 50 becomes too small. If the diameter of the first segment 51 is larger than 4 mm, the overall structural dimensions of the valve seat 10 become large, and the volume of the valve seat 10 becomes large. Therefore, by setting the diameter of the first segment 51 to 1 mm to 4 mm, the flow rate of the fluid flowing out from the valve port 50 can be increased and the volume of the valve seat 10 can be reduced. Specifically, the diameter of the first segment 51 is 1 mm, 1.65 mm, 2.0 mm, 3 mm, 3.2 mm, 4 mm, or the like.

[0024] Specifically, if the diameter of the first segment 51 is A and the diameter of the second segment 52 is B, then B≧1.2A. If B is smaller than 1.2A, the difference between the diameter of the second segment 52 and the diameter of the first segment 51 becomes small, and the difference between the diameter of the second segment 52 and the diameter of the third segment 53 becomes large, and furthermore, the vortex generated by the fluid at the connection point between the second segment 52 and the third segment 53 becomes large, and furthermore, the noise caused by the fluid becomes large. Therefore, by making B≧1.2A, the noise caused by the fluid can be reduced. Specifically, B is equal to 1.2A, B is equal to 1.4A, or B is equal to 1.6A.

[0025] Specifically, if the diameter of the second segment 52 is B and the diameter of one end of the third segment 53 close to the first storage chamber 30 is C, C≧1.2B. If C is smaller than 1.2B, the difference between the diameter of the one end of the third segment 53 close to the first storage chamber 30 and the diameter of the second segment 52 becomes small, so the difference between the diameter of the second segment 52 and the diameter of the first segment 51 becomes large, and furthermore, the vortex generated by the fluid at the connection point between the first segment 51 and the second segment 52 becomes large, causing the fluid to generate large noise at the connection point between the first segment 51 and the second segment 52. Therefore, by making C≧1.2B, the noise caused by the fluid can be further reduced. Specifically, C is equal to 1.2B, C is equal to 1.5B, or C is equal to 1.7B.

[0026] Specifically, if the length of the first segment 51 is L1, the length of the second segment 52 is L2, and the length of the third segment 53 is L3, then L1=N*(L2+L3), where N is 0.5 to 2. If L1 is smaller than 0.5(L2+L3), the length of the first segment 51 becomes too small, and when the fluid flows from the first storage chamber 30 into the first segment 51, the vortex generated by the fluid in the first segment 51 does not disappear, so that the fluid generates large vortexes and noise at the connection point between the first segment 51 and the second segment 52. If L1 is larger than 0.5(L2+L3), the length of the first segment 51 becomes too long, and the entire volume of the valve seat 10 becomes large. Therefore, by setting L1=N*(L2+L3) and taking N in the range of 0.5 to 2, it is possible to reduce the noise caused by the fluid and at the same time reduce the volume of the valve seat 10. Specifically, N may be 0.5, 1, or 2, etc.

[0027] Specifically, the length of the first segment 51 is L1, the first storage chamber 30 has a columnar structure, the first buffer segment 21 has a columnar structure, the distance between the end face of the first storage chamber 30 close to the valve orifice 50 and the side wall of the first buffer segment 21 close to the valve orifice 50 is L4, the center line of the first buffer segment 21 overlaps with the center line of the fluid opening 40, and the length of the first buffer segment 21 is L5, then L1=N*(L4+L5), where N is 0.5 to 2. If L1 is smaller than 0.5 (L4+L5), the length of the first segment 51 is small, so the noise generated by the fluid in the first segment 51 and the second segment 52 becomes large. If L1 is larger than 2 (L4+L5), the volume of the first storage chamber 30 is small, so the fluid cannot be significantly decelerated in the first storage chamber 30, so the flow velocity when the fluid flows into the valve orifice 50 becomes large, and further, the noise caused by the fluid becomes large. Therefore, the flow velocity can be significantly reduced by setting L1=N*(L4+L5) and taking N within the range of 0.5 to 2. Specifically, N may be 0.5, 1, 2, or the like.

[0028] The present application further provides an electronic expansion valve, which includes a valve housing and the above-described valve seat, a second chamber is provided in the valve housing, one end of the valve housing is connected to the first end 11 of the valve seat, and the first chamber 30 communicates with the second chamber. A valve core assembly is further provided in the electronic expansion valve, which is provided in the first chamber 30 and the second chamber, and the valve core assembly is used to seal or open the valve port.

[0029] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and further, when the terms "comprise" and / or "comprise" are used herein, it is to be understood that features, steps, operations, devices, assemblies, and / or combinations thereof are present.

[0030] Unless otherwise specifically described, the relative arrangement of the components and steps, the formulas and values ​​described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for convenience of description, the dimensions of each part shown in the drawings are not drawn in actual proportion. Detailed descriptions of techniques, methods and equipment already known to those skilled in the art may be omitted, but the techniques, methods and equipment should be considered as part of the approved specification, as necessary. In all examples shown and described herein, any specific values ​​should be interpreted as being merely illustrative and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar symbols and letters represent similar things in the following drawings, so that once something is defined in one drawing, there is no need to further describe it in the subsequent drawings.

[0031] In the description of this application, orientations or positional relationships expressed by orientation terms such as "front, back, up, down, left, right", "lateral, longitudinal, vertical, horizontal", "top, bottom", etc. are generally based on the orientations or positional relationships shown in the drawings, but this is merely for the ease and simplicity of the description of this application, and unless otherwise stated, these orientation terms do not indicate or imply that the devices or elements shown necessarily have a specific orientation or are constructed and operated in a specific orientation, and should not be understood as limiting the scope of protection of this application, and orientation terms such as "inside, outside" are inside and outside with respect to the contour of each member itself.

[0032] For ease of description, spatially relative terms such as "above," "upper," "on top of," "above," and the like may be used herein to describe the spatial location of one device or feature relative to another device or feature as depicted in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations during use or operation other than the orientation depicted in the figures of the device. For example, if a device in the figures is turned upside down, a device described as "above other devices or structures" or "on top of other devices or structures" would then be positioned "below other devices or structures" or "below other devices or structures." Thus, the exemplary term "above" can include two orientations: "above" and "below." The device can also be positioned in other different ways (rotated 90 degrees or positioned in other orientations) and a corresponding interpretation made of the spatially relative descriptions used herein.

[0033] It should be further explained that the use of terms such as "first", "second", etc. to define parts is merely intended to distinguish corresponding parts, and unless otherwise specified, the above terms have no special meaning and should not be understood as limiting the scope of protection of the present application.

[0034] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The valve seat (10) has a first end and a second end provided opposite to each other, a first storage chamber (30) is provided within the valve seat (10), a fluid opening (40) is provided on a side surface of the valve seat (10), a buffer recess (20) is provided on an inner wall of the first storage chamber (30), the buffer recess (20) is provided corresponding to the fluid opening (40), a valve port (50) is provided at a second end (12) of the valve seat, the valve port (50) is connected to the first storage chamber (30), and the valve port (50) is connected to a first segment (50) provided in sequence. a valve seat including a valve seat first end (11) and a valve seat second end (12), the valve seat including a valve seat including a valve seat including a valve seat including a valve seat having a first end (11) and a valve seat including a valve seat having a second end (12) and a valve seat including a valve seat having a second end (12) and a valve seat having ...).

2. 2. The valve seat according to claim 1, wherein the buffer recess (20) includes a first buffer segment (21) and a second buffer segment (22) connected to each other, the first buffer segment (21) being provided adjacent to the first storage chamber (30), and a circumferential dimension of the second buffer segment (22) gradually decreasing in a direction away from the fluid opening (40).

3. 3. The valve seat of claim 2, wherein the second buffer segment is tapered, a centerline of the second buffer segment overlaps with a centerline of the fluid opening, and a taper angle of the second buffer segment is α, the range of α being 50° to 160°.

4. The valve seat of claim 1, wherein the first segment (51) has a diameter of between 1 mm and 4 mm.

5. 2. The valve seat of claim 1, wherein the diameter of the first segment (51) is A and the diameter of the second segment (52) is B, where B > 1.2A.

6. 2. The valve seat according to claim 1, wherein, when a diameter of the second segment (52) is B and a diameter of one end of the third segment (53) close to the first chamber (30) is C, C≧1.2B.

7. 2. The valve seat of claim 1, wherein the first segment (51) has a length L1, the second segment (52) has a length L2, and the third segment (53) has a length L3, where L1=N*(L2+L3), N being between 0.5 and 2.

8. The length of the first segment (51) is L1, The first storage chamber (30) has a columnar structure, the first buffer segment (21) has a columnar structure, and a distance between an end face of the first storage chamber (30) close to the valve port (50) and a side wall of the first buffer segment (21) close to the valve port (50) is L4, The center line of the first buffer segment (21) overlaps with the center line of the fluid opening (40), and the length of the first buffer segment (21) is L5.

3. The valve seat of claim 2, wherein L1=N*(L4+L5), where N is between 0.5 and 2.

9. 9. An electronic expansion valve comprising: a valve housing; and the valve seat according to any one of claims 1 to 8, wherein a second chamber is provided within the valve housing, one end of the valve housing is connected to a first end (11) of the valve seat, and the first chamber (30) is in communication with the second chamber.

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