Valve device, electronic expansion valve and cooling system

Abstract

The present invention relates to a valve device (1), an electronic expansion valve (2), and a cooling system (3). The valve device (1) includes a valve seat assembly (100) having a valve chamber (110) and a valve orifice portion (200), and a spindle assembly (500). The valve orifice portion (200) is provided with a valve orifice passage (210) that can communicate with the valve chamber (110). The valve seat assembly (100) further includes a first connection port portion (300), which has a first passage (310) that can communicate with the valve chamber (110). The valve orifice portion (200) has a first flow guide portion (400) at one end thereof adjacent to the valve chamber (110), which has a first flow guide passage (410) whose flow area gradually increases in the direction away from the valve orifice passage (210).

Description

[Technical Field]

[0001] Related Applications This application claims priority to a Chinese patent application bearing application number 202310521652.9, filed on May 9, 2023, entitled "Valve Device, Electronic Expansion Valve and Refrigeration System," the entire text of which is incorporated herein by reference.

[0002] The present application relates to the technical field of valves, and in particular to valve devices, electronic expansion valves and refrigeration systems. [Background technology]

[0003] During operation of an electronic expansion valve, the refrigerant always passes through the valve seat when flowing in and out of the valve, but the stepped right-angle structure on the inner wall of the valve seat passage tends to make the refrigerant flow unstable, which causes loud noise. A remedy in the related art is to chamfer the stepped structure in the valve seat passage, but repeated experiments by those skilled in the art have shown that even if chamfering is performed, loud noise still occurs at the stepped structure of the valve seat passage. Summary of the Invention

[0004] According to various embodiments of the present application, a valve device, an electronic expansion valve, and a refrigeration system are provided.

[0005] The valve device provided in the present application includes a valve seat assembly and a spindle assembly, the valve seat assembly having a valve chamber, the spindle assembly being at least partially disposed in the valve chamber, the valve seat assembly having a valve orifice portion, the valve orifice portion having a valve orifice passage communicable with the valve chamber, the flow area of ​​the valve orifice passage being smaller than that of the valve chamber, and the spindle assembly being movably engageable with the valve orifice portion to control the opening degree of the valve orifice passage. The valve seat assembly further has a first connection orifice portion, the first connection orifice portion having a first passage communicable with the valve chamber, an annular first directing portion at one end of the valve orifice portion adjacent to the valve chamber, and a first directing passage defined in the first directing portion, the flow area of ​​the first directing passage gradually increasing in a direction away from the valve orifice passage. The extending direction of the inner wall surface of the first passage at one end close to the valve orifice passage is the same as the tangential direction of the inner wall surface of the first directing passage at one end remote from the valve orifice passage, and the inner wall surface of the first directing passage at one end remote from the valve orifice passage and the inner wall surface of the first passage at one end close to the valve orifice passage are smoothly connected.

[0006] In one embodiment, one end of the inner wall surface of the first guide passage, which is adjacent to the valve orifice passage, extends to the end of the valve orifice portion, which is closest to the spindle assembly.

[0007] In one embodiment, the connecting line where the radial cross section of the annular first flow guide section intersects with the inner wall surface of the first flow guide passage is defined as the cross-sectional contour of the first flow guide passage, and the cross-sectional contour of the first flow guide passage forms an arc curved toward the side closest to the valve orifice passage.

[0008] In one embodiment, the cross-sectional contour of the first guide passage is arc-shaped.

[0009] In one embodiment, the cross-sectional contour of the first conducting passage is an elliptical arc, a hyperbolic arc, or a parabolic arc.

[0010] In one embodiment, a second pipe joint part is provided at one end of the valve orifice part away from the valve chamber, and the second pipe joint part is provided with a second passage communicating with the valve orifice passage, and the flow area of ​​the second passage is larger than the flow area of ​​the valve orifice passage.

[0011] In one embodiment, an annular second flow guide section is provided at one end of the valve orifice section adjacent to the second passage, and a second flow guide passage is provided in the second flow guide section, and the flow area of ​​the second flow guide passage tends to gradually increase along the direction away from the valve orifice passage.

[0012] In one embodiment, the extending direction of the inner wall surface of the second passage at one end close to the valve orifice passage is the same as the tangential direction of the inner wall surface of the second directing passage at one end remote from the valve orifice passage, and the inner wall surface of the second directing passage at one end remote from the valve orifice passage and the inner wall surface of the second passage at one end close to the valve orifice passage are smoothly connected.

[0013] In one embodiment, the first flow guide and the valve seat assembly are integral or separate.

[0014] The present application further provides an electronic expansion valve including the valve device according to any of the above embodiments.

[0015] The present application further provides a refrigeration system including an electronic expansion valve according to any of the above embodiments.

[0016] The details of one or more embodiments of the application are set forth in the drawings and description below. Other features, objects, and advantages of the application will become apparent from the description, drawings, and claims. [Brief explanation of the drawings]

[0017] To better describe and explain the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more drawings. Any additional details or examples used to illustrate the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or examples described herein, and the best mode of these inventions as understood herein.

[0018] [Figure 1] 1 is a structural schematic diagram of a valve device according to an embodiment of the present application; [Figure 2] 1 is a cross-sectional view of an example valve device provided in the present application. [Figure 3] FIG. 3 is an enlarged view of a portion A shown in FIG. 2. [Figure 4] FIG. 2 is an enlarged partial cross-sectional view of another example valve device provided in the present application. [Figure 5] FIG. 1 is a structural schematic diagram of a valve body assembly according to an embodiment of the present application. [Figure 6] FIG. 1 is a structural schematic diagram of a cooling system in one embodiment provided in the present application.

[0019] 1 valve device, 2 electronic expansion valve, 3 cooling system, 100 valve seat assembly, 110 valve chamber, 200 valve port portion, 210 valve port passage, 300 first connecting port portion, 310 first passage, 320 connecting flare, 400 first directing portion, 410 first directing passage, 500 spindle assembly, 610 first connecting pipe, 620 second connecting pipe, 700 second pipe joint portion, 710 second passage, 711 tapered segment, 712 columnar segment, 800 second directing portion, 810 second directing passage, 900 housing. DETAILED DESCRIPTION OF THE INVENTION

[0020] In describing this application, it should be understood that the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are based on the orientations or positional relationships shown in the drawings and are intended merely to facilitate and simplify the description of this application, and do not indicate or imply that the devices or elements shown must have a particular orientation, be configured, and operate in a particular orientation, and should not be construed as limiting this application.

[0021] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying relative importance or as implicitly designating the number of technical features indicated. Thus, a feature qualified by "first" or "second" can explicitly or implicitly include at least one of that feature. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless explicitly and specifically limited.

[0022] In this application, unless otherwise clearly specified or limited, the terms "attached," "connected to each other," "connected," "fixed," etc. should be interpreted in a broad sense, and may mean, for example, fixedly connected, detachably connected, or integral, mechanically connected, electrically connected, directly connected to each other, indirectly connected to each other via an intermediate medium, internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0023] In this application, unless otherwise clearly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact with each other, or that the first and second features are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0024] It should be noted that when an element is referred to as "fixed" or "mounted" on another element, it may be directly on the other element, or there may be intervening elements present. When an element is referred to as being "connected" to another element, it may be directly connected to the other element, or there may be intervening elements present as well. The terms "vertical," "horizontal," "top," "bottom," "left," "right," and similar expressions used herein are for descriptive purposes only and do not represent the only embodiment.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used in the specification of this application are only intended to describe specific embodiments and are not intended to limit the scope of this application. The term "and / or" used herein includes one or more of the associated listed items, and any and all combinations thereof.

[0026] During operation of an electronic expansion valve, the refrigerant always passes through the valve seat when flowing in and out of the valve, but the stepped right-angle structure on the inner wall of the valve seat passage tends to make the refrigerant flow unstable, which causes loud noise. A remedy in the related art is to chamfer the stepped structure in the valve seat passage, but repeated experiments by those skilled in the art have shown that even if chamfering is performed, loud noise still occurs at the stepped structure of the valve seat passage.

[0027] 1 to 5 , to solve the problem in the related art that noise is easily generated at the stepped structure of the inner wall of the valve seat, the present application provides a valve device 1 and a cooling system 3. The valve device 1 includes a housing 900, a valve seat assembly 100, and a spindle assembly 500. The valve seat assembly 100 is provided with a valve chamber 110, and at least a portion of the spindle assembly 500 is provided in the valve chamber 110. The housing 900 covers a portion of the spindle assembly 500 that protrudes outward from the valve seat assembly 100. The valve seat assembly 100 is provided with a valve orifice portion 200, and the valve orifice portion 200 is provided with a valve orifice passage 210 that can communicate with the valve chamber 110, and the flow area of ​​the valve orifice passage 210 is smaller than the flow area of ​​the valve chamber 110. The spindle assembly 500 is movably engageable with the valve orifice portion 200 to control the opening degree of the valve orifice passage 210. The valve seat assembly 100 is further provided with a first connection port portion 300, which is provided with a first passage 310 that can communicate with the valve chamber 110. An annular first flow guide portion 400 is provided at one end of the valve orifice portion 200 adjacent to the valve chamber 110, and a first flow guide passage 410 is provided in the first flow guide portion 400, and the flow area of ​​the first flow guide passage 410 gradually increases in the direction away from the valve orifice passage 210. The extending direction of the inner wall surface of the first passage 310 at one end adjacent to the valve orifice passage 210 is the same as the tangential direction of the inner wall surface of the first flow guide passage 410 at one end remote from the valve orifice passage 210, and the inner wall surface of the first flow guide passage 410 at one end remote from the valve orifice passage 210 and the inner wall surface of the first passage 310 at one end adjacent to the valve orifice passage 210 are smoothly connected.

[0028] Note that "the inner wall surface at one end of the first direct flow passage 410 away from the valve orifice passage 210" refers to the inner wall surface at the end position of the first direct flow passage 410 away from the valve orifice passage 210, and "the inner wall surface at one end of the first passage 310 close to the valve orifice passage 210" refers to the inner wall surface at the end position of the first passage 310 close to the valve orifice passage 210.

[0029] The direction of extension of the inner wall surface of the first passage 310 at one end adjacent to the valve orifice passage 210 is the same as the tangential direction of the inner wall surface of the first direct flow passage 410 at one end remote from the valve orifice passage 210, and the inner wall surface of the first direct flow passage 410 at one end remote from the valve orifice passage 210 and the inner wall surface of the first passage 310 at one end adjacent to the valve orifice passage 210 are smoothly connected. Therefore, when the refrigerant flows from the first passage 310 to the first direct flow passage 410, the flow of the refrigerant is smooth overall, and thus the noise generated by the refrigerant during flow is significantly reduced.

[0030] Furthermore, the flow area of ​​the first guide passage 410 gradually increases in the direction away from the valve orifice passage 210, so that the refrigerant flows smoothly through the first guide passage 410, thereby further reducing the noise generated by the refrigerant during flow.

[0031] Furthermore, multiple simulation analyses have shown that the vortex generated by the refrigerant in the first guide passage 410 is extremely small, or even non-existent, which ensures that the refrigerant flowing through the valve device 1 is unlikely to generate loud noise.

[0032] In one embodiment, the first flow guide portion 400 and the valve seat assembly 100 are formed as a single unit. This prevents a gap from occurring between the first flow guide portion 400 and the valve seat assembly 100, further reducing noise generated when the refrigerant flows through the valve device 1. This configuration also improves the structural strength of the valve device 1 and makes it easier to process the valve device 1.

[0033] However, the present invention is not limited to this, and in other embodiments, the first flow guide portion 400 and the valve seat assembly 100 may be provided separately.

[0034] Specifically, the first flow guide portion 400 is formed with the valve seat assembly 100 by welding or by thermal processing.

[0035] In one embodiment, one end of the inner wall surface of the first guide passage 410 that is close to the valve orifice passage 210 extends to the end of the valve orifice portion 200 that is closest to the spindle assembly 500 .

[0036] It should be noted that the "closest end of the valve orifice portion 200 closest to the spindle assembly 500" refers to the position of the valve orifice portion 200 closest to the surface of the spindle assembly 500 when the spindle assembly 500 closes the valve orifice passage 210, and when the spindle assembly 500 completely closes the valve orifice passage 210, the closest end becomes the contact position between the spindle assembly 500 and the valve orifice portion 200.

[0037] This configuration allows the refrigerant to flow directly from the first passage 310 to the valve orifice passage 210 along the inner wall surface of the first guide passage 410, thereby preventing the refrigerant flow direction from suddenly changing when it flows from the first guide passage 410 to the end face of the valve orifice portion 200 adjacent to the valve chamber 110, and thereby preventing an increase in noise generated when the refrigerant flows.

[0038] Specifically, in one embodiment, the valve orifice passage 210 is cylindrical, and the valve orifice passage 210 and the valve chamber 110 are coaxial. Thus, the end of the valve orifice portion 200 closest to the spindle assembly 500 is the intersection of the valve orifice passage 210 and the end face of the valve orifice portion 200 closest to the valve chamber 110.

[0039] In another embodiment, if the valve orifice passage 210 has a chamfer at one end thereof adjacent to the valve chamber 110, the end of the valve orifice portion 200 closest to the spindle assembly 500 is the position closest to the surface of the spindle assembly 500 at the chamfered location.

[0040] 3 and 4 , the connecting line where the radial cross section of the annular first guide section 400 intersects with the inner wall surface of the first guide passage 410 is defined as the cross-sectional contour of the first guide passage 410, and the cross-sectional contour of the first guide passage 410 forms an arc that curves toward the side closer to the valve orifice passage 210. This configuration significantly improves the smoothness of the first guide passage 410, further reducing the noise generated when the refrigerant flows through the first guide passage 410.

[0041] Furthermore, in one embodiment, the cross-sectional contour of the first flow guide passage 410 is arc-shaped, as shown in Figures 3 and 4. With this configuration, the following two data tables were obtained by simulation analysis, where Table 1 shows the test results for noise when the first flow guide section 400 is not provided, and Table 2 shows the test results for noise when the first flow guide section 400 is provided.

[0042] [Table 1]

[0043] [Table 2]

[0044] A condition control experiment showed that when other conditions were kept the same and the presence or absence of the first guide section 400 was controlled, the noise level in Table 1 was significantly greater than the noise level in Table 2. In other words, the above simulation data shows that by providing the first guide section 400, whose cross-sectional contour line of the first guide passage 410 is an arc, the noise generated when the refrigerant flows through the valve device 1 can be significantly reduced.

[0045] Furthermore, theoretical analysis shows that since the curvature of an arc is constant, making the cross-sectional contour of the first guide passage 410 arc-shaped can uniformly change the flow direction of the refrigerant, thereby further reducing the noise generated by the flow of the refrigerant.

[0046] Specifically, in this embodiment, the length of the cross-sectional contour of the first guide passage 410 is defined as l, where l is 3.022 mm; the radius of the circle corresponding to the cross-sectional contour of the first guide passage 410 is defined as r, where r is 18.14 mm; and the central angle corresponding to the cross-sectional contour of the first guide passage 410 is defined as a, where a is 19.1°.

[0047] However, this is not limiting, and in other embodiments, the cross-sectional contour of the first guide channel 410 may have other curved shapes, such as an elliptical arc, a hyperbolic curve, or a parabolic curve, which will not be listed here one by one.

[0048] 3 and 4, the first connection port 300 is further provided with a connection flare 320, which is provided at one end of the first passage 310 remote from the valve chamber 110 and communicates with the valve chamber 110 via the first passage 310. In this way, the first connection port 300 can be easily connected to an external first connection pipe 610 via the connection flare 320.

[0049] 3 and 4, a second pipe coupling part 700 is provided at one end of the valve orifice part 200 remote from the valve chamber 110, and the second pipe coupling part 700 is provided with a second passage 710 communicating with the valve orifice passage 210, and the flow area of ​​the second passage 710 is larger than that of the valve orifice passage 210. In this way, the valve device 1 can be easily connected to an external second connecting pipe 620 via the second passage 710.

[0050] 4, an annular second guide section 800 is provided at one end of the valve orifice section 200 adjacent to the second passage 710, and a second guide passage 810 is provided in the second guide section 800, with the flow area of ​​the second guide passage 810 gradually increasing in the direction away from the valve orifice passage 210. In this way, when the refrigerant flows from the second passage 710 through the valve orifice passage 210 to the valve chamber 110, the second guide section 800 can significantly reduce the noise generated by the flow of the refrigerant.

[0051] Furthermore, in one embodiment, as shown in FIG. 4 , the extending direction of the inner wall surface of the second passage 710 at one end close to the valve orifice passage 210 is the same as the tangential direction of the inner wall surface of the second directing passage 810 at one end remote from the valve orifice passage 210, and the inner wall surface of the second directing passage 810 at one end remote from the valve orifice passage 210 and the inner wall surface of the second passage 710 at one end close to the valve orifice passage 210 are smoothly connected.

[0052] 3 and 4, the second passage 710 includes a tapered segment 711 and a columnar segment 712, and the tapered segment 711 is disposed between the columnar segment 712 and the valve orifice passage 210. In this manner, the difference between the flow area of ​​the second passage 710 and the flow area of ​​the valve orifice passage 210 is further reduced, and the flow noise of the refrigerant is further reduced.

[0053] Referring to FIG. 6, the present application further provides an electronic expansion valve 2, which includes the valve device 1 according to any of the above embodiments.

[0054] Referring to FIG. 6, the present application further provides a refrigeration system 3 including the electronic expansion valve 2 according to any of the above embodiments.

[0055] In addition, in this embodiment, the valve device 1 is an electronic expansion valve, and in other embodiments, the valve device 1 may be a solenoid valve or other types of valves, which are not listed here one by one.

[0056] The technical features of the above embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but as long as there is no contradiction in the combination of these technical features, any combination should be considered within the scope described in this specification.

[0057] The above examples merely illustrate some embodiments of the present application, and although the descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the patent claims of the present application. It should be noted that those skilled in the art can make some modifications and improvements without departing from the spirit of the present application, and all of these are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be governed by the scope of the appended claims.

Claims

1. a valve seat assembly; and a spindle assembly, wherein the valve seat assembly is provided with a valve chamber, the spindle assembly is at least partially provided in the valve chamber, the valve seat assembly is provided with a valve orifice portion, and the valve orifice portion is provided with a valve orifice passage capable of communicating with the valve chamber, the flow area of ​​the valve orifice passage being smaller than the flow area of ​​the valve chamber, and the spindle assembly is movably engageable with the valve orifice portion to control the opening degree of the valve orifice passage; the valve seat assembly is further provided with a first connection port portion, the first connection port portion being provided with a first passage capable of communicating with the valve chamber, the valve orifice portion being provided with an annular first directing portion at one end thereof adjacent to the valve chamber, the first directing portion being provided with a first directing passage, the flow area of ​​the first directing passage gradually increasing along a direction away from the valve orifice passage; a valve device in which an extending direction of an inner wall surface of the first passage at one end close to the valve orifice passage is the same as a tangential direction of an inner wall surface of the first directing passage at one end remote from the valve orifice passage, and the inner wall surface of the first directing passage at one end remote from the valve orifice passage and the inner wall surface of the first passage at one end close to the valve orifice passage are smoothly connected.

2. 2. The valve device according to claim 1, wherein one end of the inner wall surface of the first guide passage adjacent to the valve orifice passage extends to the end of the valve orifice portion closest to the spindle assembly.

3. 2. The valve device according to claim 1, wherein a connecting line at a point where a cross section of the annular first flow guide portion taken along a radial direction intersects with an inner wall surface of the first flow guide passage is defined as a cross-sectional contour line of the first flow guide passage, and the cross-sectional contour line of the first flow guide passage forms an arc shape that curves toward a side adjacent to the valve orifice passage.

4. 4. The valve device according to claim 3, wherein the cross-sectional contour of the first guide passage is arc-shaped.

5. 4. The valve device according to claim 3, wherein a cross-sectional contour of the first guide passage is an elliptical arc, a hyperbolic arc, or a parabolic arc.

6. 2. The valve device according to claim 1, wherein a second pipe coupling portion is provided at one end of the valve orifice portion remote from the valve chamber, the second pipe coupling portion is provided with a second passage communicating with the valve orifice passage, and the flow area of ​​the second passage is larger than the flow area of ​​the valve orifice passage.

7. 7. The valve device according to claim 6, wherein an annular second flow guide portion is provided at one end of the valve orifice portion adjacent to the second passage, and a second flow guide passage is provided in the second flow guide portion, and a flow area of ​​the second flow guide passage tends to gradually increase along a direction away from the valve orifice passage.

8. 8. The valve device according to claim 7, wherein an extending direction of an inner wall surface of the second passage at one end adjacent to the valve orifice passage is the same as a tangential direction of an inner wall surface of the second directing passage at one end remote from the valve orifice passage, and the inner wall surface of the second directing passage at one end remote from the valve orifice passage and the inner wall surface of the second passage at one end adjacent to the valve orifice passage are smoothly connected.

9. The valve device according to claim 2 , wherein the first flow guide portion and the valve seat assembly are provided integrally or separately.

10. An electronic expansion valve comprising a valve device according to any one of claims 1 to 9.

11. A refrigeration system comprising the electronic expansion valve of claim 10.

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