Electronic expansion valve and refrigeration equipment
By setting a swirl pipe on the side wall of the valve body of the electronic expansion valve, the fluid swirls in the valve cavity to the valve port, which solves the problem of loud noise during the throttling process of the existing electronic expansion valve and achieves noise reduction. .
Patent Information
- Application Number
- CN202421122770.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-21
AI Technical Summary
During the throttling process, existing electronic expansion valves have severe turbulence fields in the valve cavity, resulting in large pressure pulsation and greater noise.
The first takeover is set up on the side wall of the valve body of the electronic expansion valve, and the first exit of connecting to the valve cavity on the edge wall of the extension of the extension of the electronic expansion valve, so that the fluid flows in the valve cavity to the valve mouth to improve Turbulent phenomenon, reduce pressure pulse.
This design can improve the turbulence of fluid in the electronic expansion valve, reduce the pressure pulse in the valve mouth, and reduce noise.
Smart Images
Figure CN222393117U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve and a refrigeration device. Background Art
[0002] The electronic expansion valve is an important component in the refrigeration system, and its main functions are throttling, pressure reduction and flow regulation.
[0003] The electronic expansion valve in the related technology has a lateral flow connection pipe. The fluid flows laterally when entering the valve cavity and flows axially when entering the valve port. This will cause the fluid to form a violent turbulent field in the valve cavity, resulting in large fluid pressure pulsations during the throttling process and causing large noise. Utility Model Content
[0004] The main purpose of the utility model is to provide an electronic expansion valve, aiming to reduce the noise of the electronic expansion valve.
[0005] To achieve the above-mentioned purpose, the electronic expansion valve proposed by the utility model comprises:
[0006] A valve body, provided with a valve cavity and a valve port communicated with the valve cavity, wherein the valve port is arranged at one axial end of the valve body;
[0007] a valve needle disposed in the valve cavity and configured to axially extend into or move away from the valve port; and
[0008] A first connecting pipe is provided on a side wall of the valve body, wherein the first connecting pipe is provided with a first outlet communicating with the valve cavity;
[0009] On the projection of the radial cross section of the valve body, the central axis of the first outlet is located on one side of the valve port, so that the fluid in the first connecting pipe can swirl in the valve cavity to the valve port after flowing out through the first outlet.
[0010] In one embodiment of the present application, the cavity wall surface of the valve cavity is a curved surface;
[0011] In the projection of the radial cross section of the valve body, the side wall of the first outlet away from the valve port is tangent to the cavity wall surface of the valve cavity.
[0012] In an embodiment of the present application, in the projection of the radial cross section of the valve body, the first outlet and the valve port are completely staggered.
[0013] In an embodiment of the present application, in a projection of a radial cross section of the valve body, the first outlet and the valve needle are staggered.
[0014] In one embodiment of the present application, the first connecting pipe has an extending section extending into the valve cavity, and the first outlet is provided at the extending section.
[0015] In one embodiment of the present application, the central axis of the extending section intersects with the central axis of the valve port, the axial end of the extending section is closed, and the first outlet is provided on the peripheral side wall of the extending section.
[0016] In one embodiment of the present application, the first outlet is arranged at the junction of the extending section and the cavity wall of the valve cavity.
[0017] In one embodiment of the present application, the length of the extending section is defined as L, and the radius of the valve cavity is defined as R, satisfying L≤0.5R.
[0018] In an embodiment of the present application, the first connecting pipe is eccentrically arranged with respect to the valve chamber, and the first outlet is arranged at an axial end of the first connecting pipe.
[0019] In one embodiment of the present application, a vertical distance from a central axis of the first connecting pipe to a central axis of the valve cavity is defined as H, and a diameter of the first connecting pipe is defined as D, satisfying: H≥D.
[0020] In an embodiment of the present application, the inner diameter of the first outlet is defined as d1, and the inner diameter of the valve port is defined as d2, satisfying: d1 ≥ d2.
[0021] To achieve the above object, the present application also provides an electronic expansion valve, comprising:
[0022] A valve body, provided with a valve cavity and a valve port communicating with the valve cavity, wherein the valve port is provided at one axial end of the valve body; and
[0023] The first connecting pipe is arranged on the side wall of the valve body, and the first connecting pipe has an extending section extending into the valve cavity, the central axis of the extending section intersects with the central axis of the valve port, the axial end of the extending section is closed, and the peripheral side wall of the extending section is provided with a first outlet connected to the valve cavity.
[0024] To achieve the above object, the present application also provides a refrigeration device, including the above electronic expansion valve. The electronic expansion valve includes:
[0025] A valve body, provided with a valve cavity and a valve port communicated with the valve cavity, wherein the valve port is arranged at one axial end of the valve body;
[0026] a valve needle disposed in the valve cavity and configured to axially extend into or move away from the valve port; and
[0027] A first connecting pipe is provided on a side wall of the valve body, wherein the first connecting pipe is provided with a first outlet communicating with the valve cavity;
[0028] On the projection of the radial cross section of the valve body, the central axis of the first outlet is located on one side of the valve port, so that the fluid in the first connecting pipe can swirl in the valve cavity to the valve port after flowing out through the first outlet.
[0029] In the electronic expansion valve of the technical solution of the utility model, the valve body has a valve cavity and a valve port, and the valve needle is movably arranged in the valve cavity, and can extend into or away from the valve port in the axial direction to realize the function of adjusting the valve port opening, thereby achieving the purpose of adjusting the flow rate. The first connecting pipe is arranged on the side wall of the valve body, and by improving the position of the first outlet of the first connecting pipe, the central axis of the first outlet is located on one side of the valve port on the projection of the radial cross section of the valve body, so that the fluid flowing out of the first outlet can flow tangentially from the extension direction of the valve port to form a vortex in the valve cavity, and then flow to the valve port in a spiral shape, so that the turbulence phenomenon of the fluid can be improved, the pressure pulsation in the valve port can be reduced, and the noise can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0031] Figure 1 This is a structural schematic diagram of an embodiment of the electronic expansion valve of the utility model;
[0032] Figure 2 for Figure 1 Sectional view at MM;
[0033] Figure 3 This is a structural schematic diagram of another embodiment of the electronic expansion valve of the utility model;
[0034] Figure 4 for Figure 3 Cross-sectional view at NN in the figure.
[0035] Description of Figure Numbers:
[0036]
[0037]
[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0041] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.
[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0043] The electronic expansion valve in the related technology has a lateral flow connection pipe. The fluid flows laterally when entering the valve cavity and flows axially when entering the valve port. This will cause the fluid to form a violent turbulent field in the valve cavity, resulting in large fluid pressure pulsations during the throttling process and causing large noise.
[0044] Based on this, the utility model proposes an electronic expansion valve, which is intended to form a swirl flow in the valve cavity from the radial direction of the fluid, and flow to the valve port in a spiral flow manner, thereby improving the turbulence of the fluid, reducing the pressure pulsation in the valve port, and further reducing the noise. The structure of the electronic expansion valve is described below in the form of an embodiment.
[0045] like Figures 1 to 4 As shown, the electronic expansion valve includes a valve body 100 , a valve needle 200 , a first connecting pipe 310 and a second connecting pipe 320 .
[0046] The valve body 100 is provided with a valve cavity 101 and a valve port 102 connected to the valve cavity 101, and the valve port 102 is provided at one axial end of the valve body 100; the valve needle 200 is movably provided in the valve cavity 101, and is used to extend into or away from the valve port 102 along the axial direction to adjust the opening of the valve port 102; the first connecting pipe 310 is provided on the side wall of the valve body 100, and the first connecting pipe 310 is provided with a first outlet 301 connected to the valve cavity 101; on the projection of the radial cross section of the valve body 100, the central axis of the first outlet 301 is located on one side of the valve port 102, so that the fluid in the first connecting pipe 310 can swirl in the valve cavity 101 to the valve port 102 after flowing out through the first outlet 301.
[0047] In this embodiment, the valve body 100 plays the role of supporting and installing the internal components of the electronic expansion valve (such as the valve needle 200, the guide sleeve 400, the screw and the nut, etc.). The valve body 100 is provided with a valve cavity 101 and a valve port 102. The valve cavity 101 can accommodate the internal components of the electronic expansion valve and can also play the role of allowing the fluid to pass through; the valve port 102 plays the role of a throttle port, and the opening of the valve port 102 can be adjusted by the valve needle 200 extending into or away from the valve port 102 to achieve the function of adjusting the fluid flow. In actual application, a nut and a screw are provided in the valve body 100, the nut is fixedly connected to the valve body 100, the screw is threadedly matched with the nut, and the valve needle 200 is connected to the screw, so that when the screw is rotated, the screw can move axially at the same time, and then the valve needle 200 can be driven to reciprocate in the axial direction to achieve the function of adjusting the opening of the valve port 102.
[0048] It can be understood that the valve body 100 is provided with a first connecting pipe 310 and a second connecting pipe 320, which can be used as a fluid inlet pipe and a fluid outlet pipe, respectively. In this embodiment, the first connecting pipe 310 is provided on the side wall of the valve body 100 as an example for explanation, and the second connecting pipe 320 can be provided on the side wall of the valve body 100 or at the axial end of the valve body 100. The specific position of the second connecting pipe 320 is not specifically limited here. In actual application, the first connecting pipe 310 and the second connecting pipe 320 can be fitted with the valve body 100 by interference or welding. The first connecting pipe 310 is arranged on the side wall of the valve body 100, and the fluid flowing into the valve cavity 101 from the first connecting pipe 310 flows from the side of the valve body 100. At this time, the fluid entering from the first outlet 301 of the first connecting pipe 310 is a lateral flow, and the valve port 102 is located at one axial end of the valve cavity 101. The fluid is likely to cause turbulence in the valve cavity 101. For this reason, in this embodiment, by improving the position of the first outlet 301, the central axis of the first outlet 301 is located on one side of the valve port 102 on the projection of the radial cross section of the valve body 100, so that the fluid flowing out of the first outlet 301 can flow tangentially from the extension direction of the valve port 102 to form a vortex in the valve cavity 101, and then flow in a spiral shape to the valve port 102. That is, in this embodiment, the fluid flowing out of the first outlet 301 can be combed and guided into a vortex state, and then swirl to the valve port 102, thereby avoiding fluid turbulence and reducing noise.
[0049] In the projection of the radial cross section of the valve body 100, the central axis of the first outlet 301 is located on one side of the valve port 102. It can be understood that in the projection of the radial cross section of the valve body 100, the orientation of the first outlet 301 is misaligned with the valve port 102, and the central axis of the first outlet 301 is eccentrically arranged with the central axis of the valve port 102. In practical applications, the first outlet 301 can be completely staggered with the valve port 102, or can be partially staggered.
[0050] It should be noted that, when the electronic expansion valve is used, the flow rate is adjusted by the valve needle 200 axially extending into or leaving the valve port 102. It can be understood that the valve needle 200 is coaxially arranged with the valve port 102. Then, when the direction of the first outlet 301 is misaligned with the valve port 102, the direction of the first outlet 301 is also misaligned with the valve needle 200, so that the fluid flowing out of the first outlet 301 will not directly impact the valve needle 200 head-on, thereby avoiding the valve needle 200 from shaking and generating mechanical noise, and at the same time, the impact noise of the fluid on the valve needle 200 can be reduced.
[0051] In the electronic expansion valve of the technical solution of the utility model, the valve body 100 has a valve cavity 101 and a valve port 102, and the valve needle 200 is movably arranged in the valve cavity 101, and can extend into or away from the valve port 102 along the axial direction, so as to realize the function of adjusting the opening of the valve port 102, and thus achieve the purpose of adjusting the flow. The first connecting pipe 310 is arranged on the side wall of the valve body 100, and the position of the first outlet 301 of the first connecting pipe 310 is improved, so that on the projection of the radial cross section of the valve body 100, the central axis of the first outlet 301 is located on one side of the valve port 102, so that the fluid flowing out of the first outlet 301 can flow tangentially from the extension direction of the valve port 102 to form a vortex in the valve cavity 101, and then flow to the valve port 102 in a spiral shape, so that the turbulence phenomenon of the fluid can be improved, the pressure pulsation in the valve port can be reduced, and the noise can be reduced.
[0052] In one embodiment of the present application, Figure 2 and Figure 4 , the cavity wall surface of the valve cavity 101 is an arc surface; in the projection of the radial cross section of the valve body 100 , the side wall of the first outlet 301 away from the valve port 102 is tangent to the cavity wall surface of the valve cavity 101 .
[0053] The cavity wall surface of the valve cavity 101 is an arc surface, and it can be understood that the valve cavity 101 is a cylindrical cavity or a conical cavity. By projecting the radial cross section of the valve body 100, the side wall of the first outlet 301 away from the valve port 102 is tangent to the cavity wall surface of the valve cavity 101, so that at least part of the fluid in the first connecting pipe 310 can flow out from the first outlet 301 along the tangent direction of the cavity wall surface of the valve cavity 101, and flow along the cavity wall surface of the valve cavity 101 with an arc surface, so as to realize swirl; another part of the fluid can flow from the first outlet 301 to the cavity wall surface of the valve cavity 101, and then realize swirl under the guidance of the cavity wall surface of the valve cavity 101 and the guidance of the front part of the fluid.
[0054] Such a design can further enhance the guiding and combing effect on the fluid flowing out of the first outlet 301 , so that the fluid can swirl in the valve cavity 101 to the valve port 102 , making the fluid entering the valve port 102 more uniform and reducing pressure pulsation.
[0055] In order to further enhance the swirl effect, in one embodiment of the present application, Figure 2 and Figure 4 In the projection of the radial cross section of the valve body 100 , the first outlet 301 and the valve port 102 are completely staggered.
[0056] In this embodiment, on the projection of the radial cross-section of the valve body 100, the side wall of the first outlet 301 close to the valve port 102 and the central axis of the first outlet 301 are located on the same side of the valve port 102, and the orientation of the first outlet 301 is completely staggered from the valve port 102, so that the fluid flowing out of the first outlet 301 will all flow through the same side of the valve port 102, thereby avoiding the situation where the fluid flows through both sides of the valve port 102 and causes interference turbulence. In this way, the combing and guiding effect on the fluid can be further enhanced, and the swirl effect of the fluid can be made more uniform, thereby achieving a better noise reduction effect.
[0057] In one embodiment of the present application, Figure 1 and Figure 3 In the projection of the radial cross section of the valve body 100 , the first outlet 301 and the valve needle 200 are staggered.
[0058] In this embodiment, the valve needle 200 moves axially into or away from the valve port 102 to adjust the opening of the valve port 102. The first outlet 301 and the valve needle 200 are staggered on the projection of the radial cross-section of the valve body 100, so that the fluid flowing out of the first outlet 301 will not impact the valve needle 200, but will flow in a spiral around the valve needle 200. Such a setting can reduce both the fluid pulsation noise and the mechanical noise of the impact between the fluid and the valve needle 200.
[0059] In one embodiment of the present application, Figure 1 and Figure 2 The first connecting pipe 310 has an extending section 311 extending into the valve chamber 101 , and the first outlet 301 is disposed at the extending section 311 .
[0060] In this embodiment, the side wall of the valve body 100 is provided with an installation port 103, and the first pipe 310 is inserted into the installation port 103, and the two can be fixedly connected by interference fit or welding. Optionally, the first pipe 310 extends into the valve cavity 101 to ensure the reliability of the connection between the first pipe 310 and the valve body 100. By arranging the first outlet 301 at the extending section 311, the fluid outlets of the first pipe 310 are all located inside the valve cavity 101 to avoid fluid leakage.
[0061] In actual application, the central axis of the extension section 311 and the central axis of the valve port 102 can be intersected or staggered. When intersecting, the first outlet 301 can be set on the side wall of the extension section 311, so that the central axis of the first outlet 301 is located on one side of the valve port 102, ensuring the swirl guiding effect on the fluid. When staggered, the first outlet 301 can be located at the axial end of the extension section 311, or the first outlet 301 can be located on the peripheral side wall of the extension section 311, as long as it can ensure that the central axis of the first outlet 301 is located on one side of the valve port 102.
[0062] As an example, the axial end of the insertion section 311 is closed, and the first outlet 301 is arranged on the peripheral side wall of the insertion section 311. In this embodiment, by arranging the first outlet 301 on the peripheral side wall of the insertion section 311, the first outlet 301 is directed to the cavity wall surface of the valve cavity 101, so that the fluid can directly flow to the cavity wall surface of the valve cavity 101 when flowing out from the first outlet 301, and then perform swirl motion under the guidance of the cavity wall surface of the valve cavity 101. In actual application, the axis of the first outlet 301 can be orthogonal or oblique to the axis of the insertion section 311. In this embodiment, in order to make the swirl effect of the fluid better, the axis of the first outlet 301 is set to be orthogonal to the axis of the insertion section 311, so that the velocity and flow rate of the fluid along the tangential direction of the cavity wall surface of the valve cavity 101 when flowing out can be increased, thereby improving the swirl effect.
[0063] Furthermore, the first outlet 301 is disposed at the junction of the extending section 311 and the cavity wall surface of the valve cavity 101 .
[0064] It can be understood that the insertion section 311 is inserted into the interior of the valve cavity 101. By setting the first outlet 301 at the junction of the insertion section 311 and the cavity wall of the valve cavity 101, the distance between the first outlet 301 and the cavity wall of the valve cavity 101 can be shortened, so that the fluid contacts the cavity wall of the valve cavity 101 when flowing out from the first outlet 301. With such a configuration, the cavity wall of the valve cavity 101 has a better guiding effect on the fluid and a better swirl effect of the fluid. Furthermore, the wall surface at the junction of the insertion section 311 and the cavity wall of the valve cavity 101 can be tangentially connected to the side wall surface of the first outlet 301, so that the fluid can flow smoothly along the cavity wall of the valve cavity 101, thereby reducing the fluid dynamic loss.
[0065] In one embodiment of the present application, the length of the extending section 311 is defined as L, and the radius of the valve cavity 101 is defined as R, satisfying L≤0.5R.
[0066] It can be understood that the length L of the extension section 311 is the length extending into the interior of the valve cavity 101. The radius R of the valve cavity 101 is the radius of the arc formed by the cavity wall of the valve cavity 101 on the radial section of the valve body 100. After the fluid flows out from the first outlet 301, it performs a swirling motion in the valve cavity 101, and the extension section 311 extends into the interior of the valve cavity 101. Therefore, the length L of the extension section 311 cannot be too long. If it is too long, it is easy to block the fluid in the swirling state, resulting in excessive fluid resistance that is not conducive to flow. Based on this, the present embodiment sets the length L of the extension section 311 to be no greater than half of the radius R of the valve cavity 101. This setting can prevent the extension section 311 from blocking the fluid, thereby ensuring the flow speed and flow rate of the fluid.
[0067] In one embodiment of the present application, Figure 3 and Figure 4The first connecting pipe 310 is eccentrically arranged with respect to the valve chamber 101 , and the first outlet 301 is arranged at the axial end of the first connecting pipe 310 .
[0068] In this embodiment, by directly eccentrically setting the first connecting pipe 310 to the valve cavity 101, the pipe opening at the end of the first connecting pipe 310 is the first outlet 301, so that the central axis of the first outlet 301 and the central axis of the valve port 102 can be staggered only by installing the first connecting pipe 310 on the valve body 100, without the need to open additional outlets at other locations on the first connecting pipe 310 (such as the side wall of the pipe), thereby simplifying the molding process and improving production efficiency.
[0069] In actual application, the first connecting pipe 310 eccentrically arranged with respect to the valve cavity 101 may extend into the valve cavity 101 , or may not extend into the valve cavity 101 .
[0070] Further, the vertical distance from the central axis of the first connecting pipe 310 to the central axis of the valve cavity 101 is defined as H, and the pipe diameter of the first connecting pipe 310 is defined as D, satisfying: H≥D.
[0071] As can be seen from the foregoing, the first connecting pipe 310 and the valve cavity 101 are eccentrically arranged. In this embodiment, by setting the vertical distance H from the central axis of the first connecting pipe 310 to the central axis of the valve cavity 101 to be no less than the tube diameter D of the first connecting pipe 310, the first outlet 301 at the axial end of the first connecting pipe 310 is completely in an eccentric state, that is, the fluid flowing out of the first outlet 301 will flow from one side of the center of the valve cavity 101, and will not flow from both sides of the center of the valve cavity 101 to cause interference turbulence. In this way, the combing and guiding effect on the fluid can be further enhanced, and the swirl effect of the fluid can be made more uniform, thereby achieving a better noise reduction effect.
[0072] In one embodiment of the present application, Figure 2 , define the inner diameter of the first outlet 301 as d1, and the inner diameter of the valve port 102 as d2, satisfying: d1≥d2.
[0073] It can be understood that the fluid in the first connecting pipe 310 enters the valve chamber 101 through the first outlet 301, and the inner diameter d1 of the first outlet 301 cannot be too small. If it is too small, it is easy to cause throttling of the fluid at the first outlet 301, which will affect the control of the flow rate by the electronic expansion valve. In this embodiment, the inner diameter d1 of the first outlet 301 is set to be not less than the inner diameter d2 of the valve port 102, so that the flow area of the first outlet 301 is not less than the flow area of the valve port 102, so that the throttling phenomenon will not be caused to the fluid, and the accuracy of the electronic expansion valve in controlling the fluid flow rate is guaranteed.
[0074] The utility model also provides an electronic expansion valve, such as Figure 1 and Figure 2The electronic expansion valve comprises a valve body 100 and a first connecting pipe 310. The valve body 100 is provided with a valve cavity 101 and a valve port 102 communicating with the valve cavity 101. The valve port 102 is arranged at one axial end of the valve body 100. The first connecting pipe 310 is arranged on the side wall of the valve body 100. The first connecting pipe 310 has an extending section 311 extending into the valve cavity 101. The central axis of the extending section 311 intersects with the central axis of the valve port 102. The axial end of the extending section 311 is closed. The peripheral side wall of the extending section 311 is provided with a first outlet 301 communicating with the valve cavity 101.
[0075] In this embodiment, the valve body 100 plays the role of supporting and installing the internal components of the electronic expansion valve. The valve body 100 is provided with a valve cavity 101 and a valve port 102. The valve cavity 101 can accommodate the internal components of the electronic expansion valve and can also play the role of allowing fluid to pass through; the valve port 102 plays the role of a throttle port, and the opening of the valve port 102 can be adjusted by extending the valve needle 200 into or away from the valve port 102 to achieve the function of adjusting the fluid flow. The first connecting pipe 310 is provided on the side wall of the valve body 100, and the side wall of the valve body 100 is provided with an installation port 103. The first connecting pipe 310 is inserted into the installation port 103, and the two can be fixedly connected by interference fit or welding.
[0076] The first connecting pipe 310 extends into the valve cavity 101, which can ensure the reliability of the connection between the first connecting pipe 310 and the valve body 100. The extending section 311 of the first connecting pipe 310 extends into the valve cavity 101, and the central axis of the extending section 311 intersects with the central axis of the valve port 102. By closing the axial end of the extending section 311, the peripheral side wall of the extending section 311 is provided with a first outlet 301, so that the first outlet 301 faces the cavity wall surface of the valve cavity 101, so that the fluid can directly flow to the cavity wall surface of the valve cavity 101 when flowing out from the first outlet 301, and then perform swirl motion under the guidance of the cavity wall surface of the valve cavity 101, and then flow to the valve port 102 in a spiral shape, so that the turbulence phenomenon of the fluid can be improved, the pressure pulsation in the valve port can be reduced, and the noise can be reduced.
[0077] In addition, the central axis of the extension section 311 intersects with the central axis of the valve port 102, so there is no need to make additional offset improvements to the position of the installation port 103 of the valve body 100, and the function of eccentrically setting the central axis of the first outlet 301 and the valve port 102 can be achieved, which simplifies the process and improves the molding efficiency.
[0078] The utility model also provides a refrigeration device, which includes an electronic expansion valve. The specific structure of the electronic expansion valve refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The refrigeration device can be an air conditioner or a refrigerator.
[0079] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. An electronic expansion valve, characterized in that: include: A valve body, provided with a valve cavity and a valve port communicated with the valve cavity, wherein the valve port is arranged at one axial end of the valve body; A valve needle, disposed in the valve cavity, for axially extending into or moving away from the valve port; as well as A first connecting pipe is provided on a side wall of the valve body, wherein the first connecting pipe is provided with a first outlet communicating with the valve cavity; On the projection of the radial cross section of the valve body, the central axis of the first outlet is located on one side of the valve port, so that the fluid in the first connecting pipe can swirl in the valve cavity to the valve port after flowing out through the first outlet.
2. The electronic expansion valve according to claim 1, characterized in that: The cavity wall surface of the valve cavity is a curved surface; In the projection of the radial cross section of the valve body, the side wall of the first outlet away from the valve port is tangent to the cavity wall surface of the valve cavity.
3. The electronic expansion valve according to claim 1, characterized in that: In the projection of the radial cross section of the valve body, the first outlet and the valve port are completely staggered.
4. The electronic expansion valve according to claim 1, characterized in that: In the projection of the radial cross section of the valve body, the first outlet and the valve needle are staggered.
5. The electronic expansion valve according to any one of claims 1 to 4, characterized in that: The first connecting pipe has an extending section extending into the valve cavity, and the first outlet is arranged at the extending section.
6. The electronic expansion valve according to claim 5, characterized in that: The central axis of the extending section intersects with the central axis of the valve port, the axial end of the extending section is closed, and the first outlet is arranged on the peripheral side wall of the extending section.
7. The electronic expansion valve according to claim 6, characterized in that: The first outlet is arranged at the junction of the extending section and the cavity wall surface of the valve cavity.
8. The electronic expansion valve according to claim 5, characterized in that: The length of the extending section is defined as L, and the radius of the valve cavity is defined as R, satisfying L≤0.5R.
9. The electronic expansion valve according to any one of claims 1 to 4, characterized in that: The first connecting pipe is eccentrically arranged with respect to the valve cavity, and the first outlet is arranged at an axial end portion of the first connecting pipe.
10. The electronic expansion valve according to claim 9, characterized in that: The vertical distance from the central axis of the first connecting pipe to the central axis of the valve cavity is defined as H, and the pipe diameter of the first connecting pipe is defined as D, satisfying: H≥D.
11. The electronic expansion valve according to any one of claims 1 to 4, characterized in that: The inner diameter of the first outlet is defined as d1, and the inner diameter of the valve port is defined as d2, satisfying: d1≥d2.
12. An electronic expansion valve, characterized in that: include: A valve body, provided with a valve cavity and a valve port communicated with the valve cavity, wherein the valve port is arranged at one axial end of the valve body; and The first connecting pipe is arranged on the side wall of the valve body, and the first connecting pipe has an extending section extending into the valve cavity, the central axis of the extending section intersects with the central axis of the valve port, the axial end of the extending section is closed, and the peripheral side wall of the extending section is provided with a first outlet connected to the valve cavity.
13. A refrigeration device, characterized in that: Comprising the electronic expansion valve as claimed in any one of claims 1 to 12.