Electronic expansion valve and refrigeration equipment

Abstract

The utility model discloses an electronic expansion valve and refrigeration equipment, and relates to the technical field of electronic expansion valves. The electronic expansion valve comprises a valve body, a valve needle, a first connecting pipe and a second connecting pipe, and the valve body is provided with a first valve cavity, a second valve cavity and a valve port communicated with the first valve cavity and the second valve cavity, the valve needle is arranged on the valve body and used for opening or closing the valve port. The first connecting pipe is arranged on the peripheral wall of the valve body and provided with a first connector communicated with the first valve cavity, and the central axis of the first connector does not intersect with the central axis of the first valve cavity. The second connecting pipe is arranged on the peripheral wall of the valve body and provided with a second connector communicated with the second valve cavity, and the central axis of the second connector does not intersect with the central axis of the second valve cavity. According to the technical scheme, the electronic expansion valve can generate a rotational flow field in the corresponding valve cavity no matter forward flow or reverse flow occurs, the turbulent flow phenomenon of fluid is improved, pressure pulsation in the valve port is reduced, and the purpose of reducing noise is achieved.

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 having a first valve cavity and a second valve cavity separated from each other, and a valve port connecting the first valve cavity and the second valve cavity;

[0007] A valve needle, disposed on the valve body, for opening or closing the valve port;

[0008] a first connecting pipe, which is arranged on the peripheral wall of the valve body and has a first interface communicating with the first valve cavity, wherein the central axis of the first interface does not intersect with the central axis of the first valve cavity, so that the fluid flowing in from the first interface can swirl in the first valve cavity to the valve port; and

[0009] A second connecting pipe is arranged on the peripheral wall of the valve body and has a second interface connected to the second valve cavity. The central axis of the second interface does not intersect with the central axis of the second valve cavity, so that the fluid flowing in from the second interface can swirl in the second valve cavity to the valve port.

[0010] In one embodiment of the present application, the fluid flowing in from the first interface swirls in the first valve cavity to the valve port, and swirls from the valve port in the second valve cavity to the second interface, and the swirl direction in the first valve cavity is consistent with the swirl direction in the second valve cavity;

[0011] And / or, the fluid flowing in from the second interface swirls in the second valve cavity to the valve port, and swirls from the valve port in the first valve cavity to the first interface, and the swirl direction in the second valve cavity is consistent with the swirl direction in the first valve cavity.

[0012] In one embodiment of the present application, in the projection of the radial cross section of the valve body, the side wall of the first interface away from the center of the first valve cavity is tangent to the cavity wall surface of the first valve cavity;

[0013] And / or, in the projection of the radial cross section of the valve body, the side wall of the second interface away from the center of the second valve cavity is tangent to the cavity wall surface of the second valve cavity.

[0014] In one embodiment of the present application, the first connecting pipe is eccentrically arranged with respect to the first valve cavity, and the first interface is arranged at an axial end of the first connecting pipe;

[0015] And / or, the second connecting pipe is eccentrically arranged with respect to the second valve cavity, and the second interface is arranged at an axial end of the second connecting pipe.

[0016] 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 first valve cavity is defined as H1, and a diameter of the first connecting pipe is D1, satisfying: H1 ≥ D1;

[0017] And / or, a vertical distance from a central axis of the second connecting pipe to a central axis of the second valve cavity is defined as H2, and a diameter of the second connecting pipe is D2, satisfying: H2 ≥ D2.

[0018] In one embodiment of the present application, the first connecting pipe is eccentrically arranged with respect to the first valve cavity, and the first interface is arranged at the axial end of the first connecting pipe; the second connecting pipe is eccentrically arranged with respect to the second valve cavity, and the second interface is arranged at the axial end of the second connecting pipe;

[0019] The central axis of the first connecting pipe and the central axis of the second connecting pipe are arranged in parallel, and the eccentric directions of the first connecting pipe and the second connecting pipe relative to the first valve chamber are opposite.

[0020] In one embodiment of the present application, the valve needle is disposed in the first valve cavity and can axially extend into or move away from the valve port;

[0021] In the projection of the radial cross section of the valve body, the first interface and the valve needle are staggered.

[0022] In one embodiment of the present application, the valve body comprises:

[0023] A first valve seat is provided with the first valve cavity, and the first connecting pipe is provided on a peripheral wall of the first valve seat;

[0024] A second valve seat is provided with the second valve cavity, and the second connecting pipe is provided on a peripheral wall of the second valve cavity; and

[0025] A partition is arranged between the first valve seat and the second valve seat to separate the first valve cavity from the second valve cavity; the valve port is arranged on the partition, and the valve needle is movably assembled on the valve port.

[0026] In one embodiment of the present application, the partition plate and the first valve seat are an integral structure; or, the partition plate and the second valve seat are an integral structure.

[0027] In one embodiment of the present application, the first valve seat and the second valve seat are fixed by welding.

[0028] To achieve the above objectives, the present application also provides a refrigeration device, including the above electronic expansion valve.

[0029] In the electronic expansion valve of the technical solution of the utility model, the valve body has a first valve cavity and a second valve cavity separated from each other and a valve port connecting the two valve cavities, and the valve needle is movably arranged on the valve body, and can extend into or move away from the valve port to achieve the function of adjusting the opening of the valve port. The first connecting pipe is connected with the first valve cavity, and the second connecting pipe is connected with the second valve cavity, so that the fluid can be selected to flow from the first interface into the first valve cavity, then flow into the second valve cavity through the valve port, and finally flow out of the second valve cavity through the second interface, or the fluid can be selected to flow from the second interface into the second valve cavity, then flow into the first valve cavity through the valve port, and finally flow out of the first valve cavity through the first interface. That is, the electronic expansion valve has two fluid flow paths, forward and reverse, so that in actual applications, the fluid flow path with a suitable flow direction can be selected according to the actual application needs to meet different application requirements. In addition, by making the central axis of the first interface non-intersecting with the central axis of the first valve cavity, the first interface and the first valve cavity are eccentrically arranged, and the fluid flowing in from the first interface can form a vortex in the first valve cavity; by making the central axis of the second interface non-intersecting with the central axis of the second valve cavity, the second interface and the second valve cavity are eccentrically arranged, and the fluid flowing in from the second interface can form a vortex in the second valve cavity, so that regardless of the forward flow or the reverse flow, the electronic expansion valve can generate a vortex field in the corresponding valve cavity, making the fluid at the valve port more uniform, thereby improving the turbulence of the fluid, reducing the pressure pulsation in the valve port, and achieving the purpose of reducing noise. 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 This is a schematic diagram of the internal structure of an embodiment of the electronic expansion valve of the utility model;

[0033] Figure 3 for Figure 1 The cross-sectional view at MM and NN when the first connecting pipe is used as the inlet pipe and the second connecting pipe is used as the outlet pipe;

[0034] Figure 4 for Figure 1 The cross-sectional view at MM and NN when the second connecting pipe is used as the inlet pipe and the first connecting pipe is used as the outlet pipe;

[0035] Figure 5 This is a schematic diagram of the assembly structure of the first connecting pipe and the first valve chamber in the embodiment of the utility model;

[0036] Figure 6 It is a schematic diagram of the assembly structure of the second connecting pipe and the second valve chamber in the embodiment of the utility model.

[0037] Description of Figure Numbers:

[0038] Label name Label name 100 Valve body 200 Valve needle 101 First valve chamber 310 First takeover 102 Second valve chamber 301 First interface 103 Valve port 320 Second takeover 110 First valve seat 302 Second interface 120 Second valve seat 400 Guide sleeve 130 Partition

[0039] 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

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 .

[0047] The valve body 100 has a first valve cavity 101 and a second valve cavity 102 separated from each other, and a valve port 103 connecting the first valve cavity 101 and the second valve cavity 102; the valve needle 200 is arranged on the valve body 100 for opening or closing the valve port 103; the first connecting pipe 310 is arranged on the peripheral wall of the valve body 100, and has a first interface 301 connected to the first valve cavity 101, and the central axis of the first interface 301 does not intersect with the central axis of the first valve cavity 101, so as to enable the fluid flowing in from the first interface 301 to swirl in the first valve cavity 101 to the valve port 103; the second connecting pipe 320 is arranged on the peripheral wall of the valve body 100, and has a second interface 302 connected to the second valve cavity 102, and the central axis of the second interface 302 does not intersect with the central axis of the second valve cavity 102, so as to enable the fluid flowing in from the second interface 302 to swirl in the second valve cavity 102 to the valve port 103.

[0048] 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 first valve cavity 101 and a second valve cavity 102 separated from each other. The first valve cavity 101 is connected to the first connecting pipe 310, and the second valve cavity 102 is connected to the second connecting pipe 320. The opening of the valve port 103 is adjusted by moving the valve needle 200 at the valve port 103 to achieve the function of adjusting the fluid flow. In actual application, the first valve cavity 101 and the second valve cavity 102 can be coaxially arranged or eccentrically arranged.

[0049] It can be understood that the first connecting pipe 310 and the second connecting pipe 320 can be used as the fluid inlet pipe and the fluid outlet pipe respectively. When the first connecting pipe 310 is the inlet pipe, the second connecting pipe 320 is the outlet pipe; when the first connecting pipe 310 is the outlet pipe, the second connecting pipe 320 is the inlet pipe. Its specific inlet and outlet directions can be determined according to the actual application scenario. For example, when the electronic expansion valve is used in refrigeration equipment, its inlet and outlet methods can correspond to refrigeration conditions or heating conditions respectively. Take the example that under refrigeration conditions, the first connecting pipe 310 is the inlet pipe and the second connecting pipe 320 is the outlet pipe; under heating conditions, the second connecting pipe 320 is the inlet pipe and the first connecting pipe 310 is the outlet pipe for explanation (in actual application, the second connecting pipe 320 can also be the inlet pipe under refrigeration conditions):

[0050] like Figure 3 In the refrigeration condition, the fluid enters the first valve cavity 101 from the first interface 301 of the first connecting pipe 310. In this embodiment, the central axis of the first interface 301 does not intersect with the central axis of the first valve cavity 101, so that the fluid flowing in from the first interface 301 can flow toward the cavity wall of the first valve cavity 101 and form a vortex in the first valve cavity 101, and then flow to the valve port 103 in a spiral shape, and then flow through the second valve cavity 102 and flow out from the second interface 302 to the second connecting pipe 320. In this embodiment, a vortex field is formed in the first valve cavity 101, thereby avoiding fluid turbulence and reducing noise.

[0051] like Figure 4 In the heating condition, the fluid enters the second valve cavity 102 from the second interface 302 of the second connecting pipe 320. In this embodiment, the central axis of the second interface 302 does not intersect with the central axis of the second valve cavity 102, so that the fluid flowing in from the second interface 302 can flow toward the cavity wall of the second valve cavity 102 and form a vortex in the second valve cavity 102, and then flow to the valve port 103 in a spiral shape, and then flow through the first valve cavity 101 and flow out from the first interface 301 to the first connecting pipe 310. In this embodiment, a vortex field is formed in the second valve cavity 102, thereby avoiding fluid turbulence and reducing noise.

[0052] It can be seen from this that no matter in cooling conditions or heating conditions, the electronic expansion valve of this embodiment can generate a vortex field in the corresponding valve cavity, and the vortex field can weaken the turbulence phenomenon in the valve cavity, thereby reducing throttling noise.

[0053] The central axis of the first interface 301 does not intersect with the central axis of the first valve cavity 101. It is understandable that the first interface 301 is eccentrically arranged with the first valve cavity 101. On the projection of the radial cross section of the valve body 100, the orientation of the first interface 301 is misaligned with the valve port 103. Optionally, the first interface 301 can be completely misaligned with the valve port 103, or can be partially misaligned. Correspondingly, the central axis of the second interface 302 does not intersect with the central axis of the second valve cavity 102. It is understandable that the second interface 302 is eccentrically arranged with the second valve cavity 102. On the projection of the radial cross section of the valve body 100, the orientation of the second interface 302 is misaligned with the valve port 103. Optionally, the second interface 302 can be completely misaligned with the valve port 103, or can be partially misaligned.

[0054] In the electronic expansion valve of the utility model technical solution, the valve body 100 has a first valve cavity 101 and a second valve cavity 102 separated from each other and a valve port 103 connecting the two valve cavities, and the valve needle 200 is movably arranged on the valve body 100, and can extend into or move away from the valve port 103 to achieve the function of adjusting the opening of the valve port 103. The first connecting pipe 310 is connected with the first valve cavity 101, and the second connecting pipe 320 is connected with the second valve cavity 102, so that the fluid can be selected to flow into the first valve cavity 101 from the first interface 301, then flow into the second valve cavity 102 through the valve port 103, and finally flow out of the second valve cavity 102 through the second interface 302, or the fluid can be selected to flow into the second valve cavity 102 from the second interface 302, then flow into the first valve cavity 101 through the valve port 103, and finally flow out of the first valve cavity 101 through the first interface 301. That is, the electronic expansion valve has two fluid flow paths, forward and reverse, so that in practical applications, the fluid flow path with the appropriate flow direction can be selected according to the actual application needs to meet different application requirements. In addition, by making the central axis of the first interface 301 non-intersecting with the central axis of the first valve cavity 101, the first interface 301 and the first valve cavity 101 are eccentrically arranged, and the fluid flowing in from the first interface 301 can form a vortex in the first valve cavity 101; by making the central axis of the second interface 302 non-intersecting with the central axis of the second valve cavity 102, the second interface 302 and the second valve cavity 102 are eccentrically arranged, and the fluid flowing in from the second interface 302 can form a vortex in the second valve cavity 102, so that whether it is forward flow or reverse flow, the electronic expansion valve can generate a vortex field in the corresponding valve cavity, so that the fluid at the valve port 103 is more uniform, so that the turbulence phenomenon of the fluid can be improved, the pressure pulsation in the valve port can be reduced, and the purpose of reducing noise can be achieved.

[0055] In order to further improve the noise reduction effect, in one embodiment of the present application, Figure 3 The fluid flowing in from the first interface 301 swirls in the first valve cavity 101 to the valve port 103, and swirls from the valve port 103 in the second valve cavity 102 to the second interface 302. The swirl direction in the first valve cavity 101 is consistent with the swirl direction in the second valve cavity 102.

[0056] It can be understood that, in this embodiment, the first connecting pipe 310 is taken as the inlet pipe and the second connecting pipe 320 is taken as the outlet pipe. The fluid flows from the first interface 301 through the first valve cavity 101, the valve port 103, the second valve cavity 102 and the second interface 302 in sequence and enters the second connecting pipe 320. The fluid flows from the first interface 301 into the first valve cavity 101 to form a vortex field, so that the fluid flows into the valve port 103 in a spiral shape, and then flows out of the valve port 103 and continues to flow in the second valve cavity 102 in a spiral shape to form a vortex field, until it flows out through the second interface 302 to the second connecting pipe 320.

[0057] In this embodiment, the swirl direction in the first valve chamber 101 is consistent with the swirl direction in the second valve chamber 102, so that when the fluid flows from the first connecting pipe 310 to the second connecting pipe 320, the flow direction of the fluid flows in a spiral direction without sudden changes, thereby reducing resistance. At the same time, the distribution at the valve port 103 is more uniform, making the fluid pressure distribution in the first valve chamber 101 and the second valve chamber 102 more uniform, avoiding pressure pulsation and further improving the noise reduction effect.

[0058] In order to further improve the noise reduction effect, in one embodiment of the present application, Figure 4 The fluid flowing in from the second interface 302 swirls in the second valve cavity 102 to the valve port 103, and swirls from the valve port 103 in the first valve cavity 101 to the first interface 301. The swirl direction in the second valve cavity 102 is consistent with the swirl direction in the first valve cavity 101.

[0059] It can be understood that, in this embodiment, the second connecting pipe 320 is used as the inlet pipe and the first connecting pipe 310 is used as the outlet pipe. The fluid flows from the second interface 302 through the second valve cavity 102, the valve port 103, the first valve cavity 101 and the first interface 301 in sequence and enters the first connecting pipe 310. The fluid flows from the second interface 302 into the second valve cavity 102 to form a vortex field, so that the fluid flows into the valve port 103 in a spiral shape, and then flows out of the valve port 103 and continues to flow in the first valve cavity 101 to form a vortex field, until it flows out through the first interface 301 to the first connecting pipe 310.

[0060] In this embodiment, the swirl direction in the first valve chamber 101 is consistent with the swirl direction in the second valve chamber 102, so that when the fluid flows from the second connecting pipe 320 to the first connecting pipe 310, the flow direction of the fluid flows in a spiral direction without sudden changes, thereby reducing resistance. At the same time, the distribution at the valve port 103 is more uniform, making the fluid pressure distribution in the first valve chamber 101 and the second valve chamber 102 more uniform, avoiding pressure pulsation and further improving the noise reduction effect.

[0061] In one embodiment of the present application, Figure 3 and Figure 5 In the projection of the radial cross section of the valve body 100 , the side wall of the first interface 301 away from the center of the first valve cavity 101 is tangent to the cavity wall surface of the first valve cavity 101 .

[0062] In this embodiment, the side wall of the first interface 301 away from the center of the first valve cavity 101 is tangent to the cavity wall surface of the first valve cavity 101. When the first connecting pipe 310 is an inlet pipe, at least part of the fluid in the first connecting pipe 310 can flow out from the first interface 301 along the tangent direction of the cavity wall surface of the first valve cavity 101, and flow along the cavity wall surface of the first valve cavity 101 to achieve swirl; another part of the fluid can flow from the first interface 301 to the cavity wall surface of the first valve cavity 101, and then achieve swirl under the guidance of the cavity wall surface of the first valve cavity 101 and the guidance of the front part of the fluid. When the first connecting pipe 310 is an outlet pipe, the fluid flowing into the first valve cavity 101 from the valve port 103 can flow out from the first interface 301 to the first connecting pipe 310 along the tangent direction of the cavity wall of the first valve cavity 101, further enhancing the swirl guiding effect on the fluid.

[0063] In one embodiment of the present application, Figure 4 and Figure 6 In the projection of the radial cross section of the valve body 100 , the side wall of the second interface 302 away from the center of the second valve cavity 102 is tangent to the cavity wall surface of the second valve cavity 102 .

[0064] In this embodiment, the side wall of the second interface 302 away from the center of the second valve cavity 102 is tangent to the cavity wall surface of the second valve cavity 102. When the second connecting pipe 320 is an inlet pipe, at least part of the fluid in the second connecting pipe 320 can flow out from the second interface 302 along the tangent direction of the cavity wall surface of the second valve cavity 102, and flow along the cavity wall surface of the second valve cavity 102 to achieve swirl; another part of the fluid can flow from the second interface 302 to the cavity wall surface of the second valve cavity 102, and then achieve swirl under the guidance of the cavity wall surface of the second valve cavity 102 and the guidance of the front part of the fluid. When the second connecting pipe 320 is an outlet pipe, the fluid flowing into the second valve cavity 102 from the valve port 103 can flow out from the second interface 302 to the second connecting pipe 320 along the tangent direction of the cavity wall of the second valve cavity 102, further enhancing the swirl guiding effect on the fluid.

[0065] In one embodiment of the present application, Figure 3 and Figure 5 The first connecting pipe 310 is eccentrically arranged with respect to the first valve chamber 101 , and the first interface 301 is arranged at an axial end of the first connecting pipe 310 .

[0066] In this embodiment, by eccentrically setting the first connecting pipe 310 directly to the first valve cavity 101, the pipe opening at the end of the first connecting pipe 310 is the first interface 301, so that the central axis of the first interface 301 and the central axis of the valve port 103 can be staggered only by installing the first connecting pipe 310 on the valve body 100, without the need to open additional interfaces 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.

[0067] In actual application, the first connecting pipe 310 eccentrically arranged with respect to the first valve cavity 101 may extend into the first valve cavity 101 , or may not extend into the first valve cavity 101 .

[0068] In one embodiment of the present application, Figure 3 and Figure 5 , define the vertical distance from the central axis of the first connecting pipe 310 to the central axis of the first valve chamber 101 as H1, and the pipe diameter of the first connecting pipe 310 as D1, satisfying: H1≥D1.

[0069] It can be understood that the first connecting pipe 310 is eccentrically arranged with respect to the first valve chamber 101. In this embodiment, by setting the vertical distance H1 from the central axis of the first connecting pipe 310 to the central axis of the first valve chamber 101 to be no less than the tube diameter D1 of the first connecting pipe 310, the first interface 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 interface 301 will flow through one side of the center of the first valve chamber 101, and will not flow through both sides of the center of the first valve chamber 101 and 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.

[0070] In one embodiment of the present application, Figure 4 and Figure 6 The second connecting pipe 320 is eccentrically arranged with respect to the second valve chamber 102 , and the second interface 302 is arranged at the axial end of the second connecting pipe 320 .

[0071] In this embodiment, by directly eccentrically setting the second connecting pipe 320 with the second valve cavity 102, the pipe opening at the end of the second connecting pipe 320 is the second interface 302, so that the central axis of the second interface 302 and the central axis of the valve port 103 can be staggered by only installing the second connecting pipe 320 on the valve body 100, and there is no need to open additional interfaces on other parts of the second connecting pipe 320 (such as the side wall of the pipe), which simplifies the molding process and improves production efficiency.

[0072] In actual application, the second connecting pipe 320 eccentrically arranged with respect to the second valve cavity 102 may extend into the second valve cavity 102 , or may not extend into the second valve cavity 102 .

[0073] In one embodiment of the present application, Figure 4 and Figure 6 , define the vertical distance from the central axis of the second connecting pipe 320 to the central axis of the second valve chamber 102 as H2, and the pipe diameter of the second connecting pipe 320 as D2, satisfying: H2≥D2.

[0074] It can be understood that the second connecting pipe 320 is eccentrically arranged with respect to the second valve chamber 102. In this embodiment, by setting the vertical distance H2 from the central axis of the second connecting pipe 320 to the central axis of the second valve chamber 102 to be no less than the tube diameter D2 of the second connecting pipe 320, the second interface 302 at the axial end of the second connecting pipe 320 is completely in an eccentric state. That is, the fluid flowing out of the second interface 302 will flow through one side of the center of the second valve chamber 102, and will not flow through both sides of the center of the second valve chamber 102 and 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.

[0075] In one embodiment of the present application, Figures 1 to 4 The first connecting pipe 310 is eccentrically arranged with respect to the first valve cavity 101, and the first interface 301 is arranged at the axial end of the first connecting pipe 310; the second connecting pipe 320 is eccentrically arranged with respect to the second valve cavity 102, and the second interface 302 is arranged at the axial end of the second connecting pipe 320; wherein, the central axis of the first connecting pipe 310 and the central axis of the second connecting pipe 320 are arranged in parallel, and the eccentric directions of the first connecting pipe 310 and the second connecting pipe 320 relative to the first valve cavity 101 are opposite.

[0076] In this embodiment, the first connecting pipe 310 is eccentrically arranged with the first valve cavity 101, the second connecting pipe 320 is eccentrically arranged with the second valve cavity 102, and the central axis of the first connecting pipe 310 is parallel to the central axis of the second connecting pipe 320, so that the first connecting pipe 310 and the second connecting pipe 320 are located on the same side of the valve body 100, which is suitable for application scenarios that require connecting pipes on the same side, and can reduce the occupied space. The eccentric directions of the first connecting pipe 310 and the second connecting pipe 320 relative to the first valve cavity 101 are opposite, so that the eccentric directions of the first interface 301 and the second interface 302 relative to the valve port 103 are opposite, so that no matter whether the fluid flows forward or reverse, a swirl can be formed in the first valve cavity 101 and the second valve cavity 102 on the fluid flow path, and the swirl directions in the two valve cavities are consistent, so that the flow direction of the fluid is spiral flow without sudden change, which can reduce the fluid resistance, and at the same time, the distribution at the valve port 103 is more uniform, avoiding pressure pulsation, and further improving the noise reduction effect.

[0077] In one embodiment of the present application, Figures 1 to 3 The valve needle 200 is disposed in the first valve cavity 101 and can axially extend into or move away from the valve port 103; in the projection of the radial cross section of the valve body 100, the first interface 301 and the valve needle 200 are staggered.

[0078] In this embodiment, the valve needle 200 is axially extended and arranged in the first valve cavity 101, and can move axially in the first valve cavity 101 to extend into or away from the valve port 103 to adjust the opening of the valve port 103, thereby achieving the purpose of adjusting the flow rate. 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 the screw can be rotated to drive the valve needle 200 to reciprocate in the axial direction, thereby achieving the function of adjusting the opening of the valve port 103. Furthermore, a guide sleeve 400 can be provided in the first valve cavity 101 to guide the valve needle 200, so that the movement of the valve needle 200 is more stable and reliable.

[0079] By staggering the first interface 301 and the valve needle 200 on the projection of the radial cross section of the valve body 100, the fluid flowing out of the first interface 301 will not impact the valve needle 200, but will flow in a spiral around the valve needle 200. This arrangement can reduce both the fluid pulsation noise and the mechanical noise of the impact between the fluid and the valve needle 200.

[0080] In one embodiment of the present application, Figure 1 and Figure 2The valve body 100 includes a first valve seat 110, a second valve seat 120 and a partition 130. The first valve seat 110 is provided with a first valve cavity 101, and a first connecting pipe 310 is provided on the peripheral wall of the first valve seat 110; the second valve seat 120 is provided with a second valve cavity 102, and the second connecting pipe 320 is provided on the peripheral wall of the second valve cavity 102; the partition 130 is provided between the first valve seat 110 and the second valve seat 120 to separate the first valve cavity 101 from the second valve cavity 102; the valve port 103 is provided on the partition 130, and the valve needle 200 is movably assembled on the valve port 103.

[0081] This embodiment illustrates the structure of the valve body 100, where the first valve seat 110 and the second valve seat 120 respectively form a first valve cavity 101 and a second valve cavity 102, and the partition 130 serves to separate the two valve cavities. A valve port 103 is provided on the partition 130 to connect the first valve cavity 101 and the second valve cavity 102, and the opening of the valve port 103 is adjusted by moving the valve needle 200 to achieve regulation of the fluid flow between the first valve cavity 101 and the second valve cavity 102.

[0082] By configuring the valve body 100 to be a split first valve seat 110 and a split second valve seat 120 , assembly and maintenance of internal components can be facilitated. Optionally, the first valve seat 110 and the second valve seat 120 can be fixed by welding or snap-fitting.

[0083] Optionally, the first valve seat 110 and the second valve seat 120 are axially arranged along the valve body 100 , and the first valve cavity 101 , the second valve cavity 102 and the valve port 103 are coaxially arranged.

[0084] In practical applications, the first connecting pipe 310 can be plugged and assembled with the first valve seat 110 and fixed by interference fit or welding. The second connecting pipe 320 can be plugged and assembled with the second valve seat 120 and fixed by interference fit or welding.

[0085] In actual application, the partition plate 130 and the first valve seat 110 are an integral structure; or, the partition plate 130 and the second valve seat 120 are an integral structure.

[0086] The present invention further 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.

[0087] 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 having a first valve cavity and a second valve cavity separated from each other, and a valve port connecting the first valve cavity and the second valve cavity; A valve needle, disposed on the valve body, for opening or closing the valve port; A first connecting pipe is provided on the peripheral wall of the valve body and has a first interface communicating with the first valve cavity, wherein the central axis of the first interface does not intersect with the central axis of the first valve cavity, so that the fluid flowing in from the first interface can swirl in the first valve cavity to the valve port; as well as A second connecting pipe is arranged on the peripheral wall of the valve body and has a second interface connected to the second valve cavity. The central axis of the second interface does not intersect with the central axis of the second valve cavity, so that the fluid flowing in from the second interface can swirl in the second valve cavity to the valve port.

2. The electronic expansion valve according to claim 1, characterized in that: The fluid flowing in from the first interface swirls in the first valve cavity to the valve port, and swirls from the valve port in the second valve cavity to the second interface, and the swirl direction in the first valve cavity is consistent with the swirl direction in the second valve cavity; And / or, the fluid flowing in from the second interface swirls in the second valve cavity to the valve port, and swirls from the valve port in the first valve cavity to the first interface, and the swirl direction in the second valve cavity is consistent with the swirl direction in the first valve cavity.

3. The electronic expansion valve according to claim 2, characterized in that: On the projection of the radial cross section of the valve body, the side wall of the first interface away from the center of the first valve cavity is tangent to the cavity wall surface of the first valve cavity; And / or, in the projection of the radial cross section of the valve body, the side wall of the second interface away from the center of the second valve cavity is tangent to the cavity wall surface of the second valve cavity.

4. The electronic expansion valve according to claim 3, characterized in that: The first connecting pipe is eccentrically arranged with respect to the first valve cavity, and the first interface is arranged at an axial end of the first connecting pipe; And / or, the second connecting pipe is eccentrically arranged with respect to the second valve cavity, and the second interface is arranged at an axial end of the second connecting pipe.

5. The electronic expansion valve according to claim 4, characterized in that: The vertical distance from the central axis of the first connecting pipe to the central axis of the first valve cavity is defined as H1, and the diameter of the first connecting pipe is D1, satisfying: H1≥D1; And / or, a vertical distance from a central axis of the second connecting pipe to a central axis of the second valve cavity is defined as H2, and a diameter of the second connecting pipe is D2, satisfying: H2 ≥ D2.

6. The electronic expansion valve according to claim 1, characterized in that: The first connecting pipe is eccentrically arranged with respect to the first valve cavity, and the first interface is arranged at an axial end of the first connecting pipe; The second connecting pipe is eccentrically arranged with respect to the second valve cavity, and the second interface is arranged at an axial end of the second connecting pipe; The central axis of the first connecting pipe and the central axis of the second connecting pipe are arranged in parallel, and the eccentric directions of the first connecting pipe and the second connecting pipe relative to the first valve chamber are opposite.

7. The electronic expansion valve according to claim 1, characterized in that: The valve needle is disposed in the first valve cavity and can axially extend into or move away from the valve port; In the projection of the radial cross section of the valve body, the first interface and the valve needle are staggered.

8. The electronic expansion valve according to any one of claims 1 to 7, characterized in that: The valve body comprises: A first valve seat is provided with the first valve cavity, and the first connecting pipe is provided on a peripheral wall of the first valve seat; A second valve seat is provided with the second valve cavity, and the second connecting pipe is provided on a peripheral wall of the second valve cavity; and A partition is arranged between the first valve seat and the second valve seat to separate the first valve cavity from the second valve cavity; the valve port is arranged on the partition, and the valve needle is movably assembled on the valve port.

9. The electronic expansion valve according to claim 8, characterized in that: The partition plate and the first valve seat are an integral structure; or the partition plate and the second valve seat are an integral structure.

10. The electronic expansion valve according to claim 8, characterized in that: The first valve seat and the second valve seat are fixed by welding.

11. A refrigeration device, characterized in that: Comprising the electronic expansion valve as claimed in any one of claims 1 to 10.

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