CN222418056U - Electronic expansion valve and refrigeration equipment - Google Patents

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 flow guide structure and a first connecting pipe, wherein the valve body is provided with a valve cavity and a valve port communicated with the valve cavity, the valve port is arranged at one axial end of the valve body, the flow guide structure is arranged in the valve cavity and is provided with a flow guide cavity communicated with the valve cavity and the valve port, the extending direction of the flow guide cavity is consistent with the extending direction of the central axis of the valve port, the first connecting pipe is arranged on the side wall of the valve body and is provided with a first outlet communicated with the valve cavity, and the central axis of the first outlet is not intersected with the central axis of the valve cavity, so that fluid flowing from the first outlet can swirl into the flow guide cavity in the valve cavity. According to the technical scheme, the turbulence phenomenon of fluid can be improved, the pressure pulsation in the valve port can be reduced, and noise can be further reduced.

Description

Electronic expansion valve and refrigeration equipment

Technical Field

The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve and refrigeration equipment.

Background

The electronic expansion valve is an important part in the refrigeration system and mainly plays roles of throttling, depressurization and flow regulation.

The electronic expansion valve in the related art is provided with a lateral inflow connecting pipe, fluid flows laterally when entering the valve cavity and flows axially when entering the valve port, so that a severe turbulent flow field is formed in the valve cavity, and the pressure pulsation of the fluid is larger in the throttling process, so that larger noise is caused.

Disclosure of utility model

The utility model mainly aims to provide an electronic expansion valve, which aims to reduce noise of the electronic expansion valve.

In order to achieve the above object, the present utility model provides an electronic expansion valve, comprising:

The valve body is provided with a valve cavity and a valve port communicated with the valve cavity, and the valve port is arranged at one axial end of the valve body;

The flow guide structure is arranged in the valve cavity and is provided with a flow guide cavity communicated with the valve cavity and the valve port, the extending direction of the flow guide cavity is consistent with the extending direction of the central axis of the valve port, and

The first connecting pipe is arranged on the side wall of the valve body and is provided with a first outlet communicated with the valve cavity, and the central axis of the first outlet is not intersected with the central axis of the valve cavity, so that fluid flowing in from the first outlet can swirl in the valve cavity to the diversion cavity.

In one embodiment of the application, the electronic expansion valve further comprises a valve needle arranged in the valve cavity, and the valve needle can axially extend into or move away from the valve port;

The guide structure is sleeved outside the valve needle and is connected with the wall surface of the valve port arranged on the valve body, so that the guide cavity is arranged around the periphery of the valve needle.

In one embodiment of the application, the cavity wall surface of the flow guiding cavity is an arc surface, the flow guiding cavity and the valve needle are coaxially arranged, and the flow guiding cavity is annular on the radial section of the flow guiding structure.

In an embodiment of the present application, the outer circumferential surface of the flow guiding structure is an arc surface, the cavity wall surface of the valve cavity is an arc surface, and the outer circumferential surface of the flow guiding structure and the cavity wall surface of the valve cavity are coaxially arranged.

In an embodiment of the application, on a projection of a radial section of the valve body, a side wall of the first outlet, which is far from the center of the valve cavity, is tangential to a cavity wall surface of the valve cavity.

In an embodiment of the application, on a projection of a radial cross section of the valve body, a central axis of the first outlet is located outside the flow guiding structure.

In one embodiment of the present application, a first guiding inclined plane is disposed on the cavity wall surface of the guiding cavity at the end far away from the valve port;

And/or the outer peripheral surface of the flow guiding structure is provided with a second guide inclined surface at one end far away from the valve port.

In one embodiment of the application, the radial clearance between the cavity wall of the diversion cavity and the outer wall of the valve needle is defined as L, and the inner diameter of the valve port is D1, so that L is more than or equal to 0.5D1.

In one embodiment of the application, the length of the diversion cavity in the axial direction of the valve body is defined as H, and the inner diameter of the valve port is defined as D1, so that H is more than or equal to D1.

In one embodiment of the application, the inner diameter of the first outlet is defined as D2, and the inner diameter of the valve port is defined as D1, so that D2 is more than or equal to D1.

In an embodiment of the application, the first connecting pipe and the valve cavity are eccentrically arranged, and the first outlet is arranged at the axial end part of the first connecting pipe.

In one embodiment of the application, the valve body comprises:

a valve seat provided with the valve cavity, the first connecting pipe arranged on the side wall of the valve seat, and

The valve seat is arranged at the axial end part of the valve seat, the valve seat is provided with the valve port, and the flow guide structure is arranged on the valve seat, wherein the valve seat and the valve seat are of an integrated structure or a split structure.

In order to achieve the above purpose, the application also provides a refrigeration device comprising the electronic expansion valve.

According to the technical scheme, the electronic expansion valve is characterized in that the valve body is provided with the valve cavity and the valve port, the valve needle is movably arranged in the valve cavity and can axially extend into or be far away from the valve port, the function of adjusting the opening of the valve port is realized, and the purpose of adjusting the flow is further achieved. The first connecting pipe is arranged on the side wall of the valve body, the first outlet and the valve cavity are eccentrically arranged, fluid flowing in from the first outlet can form rotational flow in the valve cavity, a flow guiding structure is arranged in the valve cavity, the flow guiding structure is provided with a flow guiding cavity communicated with the valve port, fluid in the valve cavity can be rotated to the flow guiding cavity to further rotate to the valve port, the fluid at the valve port is more uniform, the turbulence phenomenon of the fluid can be improved, the pressure pulsation in the valve port is reduced, and noise can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an electronic expansion valve according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view at M-M in FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic illustration of the dimensions between the cavity wall of the flow directing cavity and the valve needle, the dimensions of the valve port, and the dimensions of the length of the flow directing cavity in the embodiment of FIG. 3;

Fig. 5 is a cross-sectional view at N-N in fig. 1.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				100	Valve body	320	Second connecting pipe
101	Valve cavity	400	Flow guiding structure
				102	Valve port	401	Diversion cavity
110	Valve seat	402	First guide inclined plane
				120	Valve port seat	403	Second guide inclined plane
200	Valve needle	500	Guide sleeve
				310	First connecting pipe

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear are referred to in the embodiments of the present utility model), the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The electronic expansion valve in the related art is provided with a lateral inflow connecting pipe, fluid flows laterally when entering the valve cavity and flows axially when entering the valve port, so that a severe turbulent flow field is formed in the valve cavity, and the pressure pulsation of the fluid is larger in the throttling process, so that larger noise is caused.

Based on the above, the invention provides an electronic expansion valve, which aims to form a plurality of rotational flows of fluid flowing in from the radial direction in a valve cavity, and the fluid flows to a valve port in a spiral flow mode, 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. The structure of the present electronic expansion valve will be described below by way of examples.

As shown in fig. 1 to 5, the electronic expansion valve includes a valve body 100, a valve needle 200, a first adapter 310, a second adapter 320, and a flow guiding structure 400.

The valve body 100 is provided with a valve cavity 101 and a valve port 102 communicated with the valve cavity 101, the valve port 102 is arranged at one axial end of the valve body 100, the valve needle 200 is movably arranged in the valve cavity 101 and used for extending into or separating from the valve port 102 along the axial direction to adjust the opening degree of the valve port 102, a flow guiding structure 400 is arranged in the valve cavity 101, the flow guiding structure 400 is provided with a flow guiding cavity 401 communicated with the valve port 102, the extending direction of the flow guiding cavity 401 is consistent with the extending direction of the central axis of the valve port 102, a first connecting pipe 310 is arranged on the side wall of the valve body 100, a first outlet 301 communicated with the valve cavity 101 is arranged on the first connecting pipe 310, and the central axis of the first outlet 301 is not intersected with the central axis of the valve cavity 101, so that fluid flowing from the first outlet 301 can flow into the flow guiding cavity 401 in the valve cavity 101.

In this embodiment, the valve body 100 functions to support and mount internal components of the electronic expansion valve (for example, the needle 200, the guide structure 400, the guide bush 500, the screw, the nut, etc.). The valve body 100 is provided with a valve cavity 101 and a valve port 102, the valve cavity 101 can play a role in accommodating an internal member of the electronic expansion valve and can play a role in allowing fluid to pass through, the valve port 102 plays a role in throttling, and the opening degree of the valve port 102 can be adjusted by moving the valve needle 200 into or away from the valve port 102 so as to realize the role in adjusting the fluid flow. During practical application, the valve body 100 is internally provided with a nut and a screw, the nut is fixedly connected with the valve body 100, the screw is in threaded fit with the nut, and the valve needle 200 is connected with the screw, so that when the screw is rotated, the screw can simultaneously axially move, and further the valve needle 200 can be driven to axially reciprocate, and the function of adjusting the opening of the valve port 102 is realized.

It can be appreciated that the valve body 100 is provided with a first connection pipe 310 and a second connection pipe 320, where the first connection pipe 310 and the second connection pipe 320 can be used as a fluid inlet pipe and a fluid outlet pipe, respectively, in this embodiment, the first connection pipe 310 is provided on a side wall of the valve body 100 as an example, and the second connection pipe 320 can be provided on a side wall of the valve body 100 or on an axial end of the valve body 100, and a specific position of the second connection pipe 320 is not limited herein. In actual use, the first adapter tube 310 and the second adapter tube 320 may be interference fit or welded fit with the cannula of the valve body 100, etc. The first connecting tube 310 is disposed on the side wall of the valve body 100, so that the fluid flowing into the valve cavity 101 from the first connecting tube 310 flows into the valve cavity 101 from the side of the valve body 100, at this time, the fluid flowing into the valve cavity 101 from the first outlet 301 of the first connecting tube 310 flows laterally, and the valve port 102 is disposed at one axial end of the valve cavity 101, so that the fluid is easy to cause turbulence in the valve cavity 101. Therefore, in this embodiment, by improving the position of the first outlet 301, the central axis of the first outlet 301 is not intersected with the central axis of the valve cavity 101, so that after the fluid in the first connecting tube 310 flows into the valve cavity 101 from the first outlet 301, a swirl flow can be formed in the valve cavity 101, meanwhile, in this embodiment, a flow guiding structure 400 is further provided in the valve cavity 101, the flow guiding structure 400 has a flow guiding cavity 401 communicating with the valve port 102, and the extending direction of the flow guiding cavity 401 is consistent with the extending direction of the central axis of the valve port 102, so that the fluid in the valve cavity 101 can swirl into the flow guiding cavity 401, and because the fluid has a swirl velocity when entering the flow guiding cavity 401, the fluid still flows in a swirl flow after entering the flow guiding cavity 401, and then flows in a spiral form into the valve port 102, thereby avoiding the phenomenon of fluid turbulence and reducing noise.

It should be noted that, in this embodiment, the fluid entering from the first outlet 301 forms a preliminary swirl before entering the flow guiding cavity 401, and then further swirl in the flow guiding cavity 401 to form a two-stage swirling effect, and compared with the scheme of directly swirling from the first outlet 301 to the valve port 102, the embodiment can prolong the path length of the fluid swirling, so that the fluid is more uniform when entering the valve port 102, the effect of reducing pressure pulsation is better, and the noise reduction effect is better.

In practical applications, the specific structure of the flow guiding structure 400 may be a sleeve structure, a block structure with a flow guiding cavity, a strip structure or other special-shaped structures, etc., according to practical situations.

The central axis of the first outlet 301 does not intersect with the central axis of the valve cavity 101, it is understood that the first outlet 301 is disposed eccentrically to the valve cavity 101, and in the projection of the radial section of the valve body 100, the orientation of the first outlet 301 is offset from the valve port 102, and in practical application, the first outlet 301 may be disposed completely offset from the valve port 102, or may be disposed partially offset.

In the electronic expansion valve provided by the technical scheme of the utility model, the valve body 100 is provided with the valve cavity 101 and the valve port 102, the valve needle 200 is movably arranged in the valve cavity 101 and can axially extend into or be far away from the valve port 102, so that the function of adjusting the opening of the valve port 102 is realized, and the purpose of adjusting the flow is further achieved. The first connecting pipe 310 is arranged on the side wall of the valve body 100, and the first outlet 301 and the valve cavity 101 are eccentrically arranged, so that fluid flowing in from the first outlet 301 can form rotational flow in the valve cavity 101, meanwhile, a flow guiding structure 400 is arranged in the valve cavity 101, the flow guiding structure 400 is provided with a flow guiding cavity 401 communicated with the valve port 102, the fluid in the valve cavity 101 can be rotated into the flow guiding cavity 401 and further rotated to the valve port 102, the fluid at the valve port 102 is more uniform, the turbulence phenomenon of the fluid can be improved, the pressure pulsation in the valve port is reduced, and noise can be reduced.

In an embodiment of the present application, as shown in fig. 2 and 3, the flow guiding structure 400 is sleeved on the outer portion of the valve needle 200 and is connected with the wall surface of the valve body 100 where the valve port 102 is provided, so that the flow guiding cavity 401 is disposed around the periphery of the valve needle 200.

In this embodiment, the flow guiding structure 400 is connected to the wall surface of the valve body 100 where the valve port 102 is provided, so that fluid in the valve cavity 101 needs to be guided and combed by the flow guiding cavity 401 before flowing to the valve port 102, and a turbulent flow phenomenon caused by that fluid flowing from the first connecting tube 310 directly enters the valve port 102 without being combed can be avoided. By the arrangement, better flow guiding and carding effects on fluid can be achieved, and fluid noise is further reduced.

In addition, the diversion structure 400 is arranged around the periphery of the valve needle 200, so that the diversion cavity 401 is arranged around the periphery of the valve needle 200, and fluid which is swirled into the diversion cavity 401 can continue to rotate around the periphery of the valve needle 200, so that the uniformity of the fluid at the valve port 102 is improved, in addition, the condition that the valve needle 200 shakes due to the fact that the fluid positively impacts the valve needle 200 can be avoided, the stability of the valve needle 200 is further improved, and meanwhile noise is further reduced.

Further, as shown in fig. 5, the cavity wall surface of the flow guiding cavity 401 is an arc surface, the flow guiding cavity 401 and the valve needle 200 are coaxially arranged, and the flow guiding cavity 401 is annular in radial section of the flow guiding structure 400.

In this embodiment, the cross section of the flow guiding cavity 401 is formed into a circular ring, so that the fluid in the flow guiding cavity 401 can more uniformly rotate around the periphery of the valve needle 200, and further the fluid can more uniformly enter the valve port 102, so that the noise reduction effect is better.

Alternatively, the flow guiding chamber 401 is a cylindrical chamber or a conical chamber.

In an embodiment of the present application, as shown in fig. 5, the outer peripheral surface of the flow guiding structure 400 is an arc surface, the cavity wall surface of the valve cavity 401 is an arc surface, and the outer peripheral surface of the flow guiding structure 400 and the cavity wall surface of the valve cavity 101 are coaxially disposed.

In this embodiment, the flow guiding structure 400 is a cylindrical structure, and the outer peripheral surface of the flow guiding structure 400 is set to be an arc surface, and the cavity wall surface of the valve cavity 401 is an arc surface, so that a fluid space with a circular ring-shaped cross section is formed between the outer peripheral surface of the flow guiding structure 400 and the cavity wall surface of the valve cavity 101, and when fluid enters from the first outlet 301, the fluid can flow rotationally along the cavity wall surface of the valve cavity 101 and the outer peripheral surface of the flow guiding structure 400, so that guiding carding action on the fluid flowing out from the first outlet 301 can be further improved, the fluid can flow to the flow guiding cavity 401 in the valve cavity 101, the fluid entering the flow guiding cavity 401 is more uniform, and pressure pulsation is reduced.

Further, as shown in fig. 5, on a projection of a radial section of the valve body 100, a side wall of the first outlet 301 away from the center of the valve chamber 101 is tangential to a chamber wall surface of the valve chamber 101.

In this embodiment, the side wall of the first outlet 301 far from the center of the valve cavity 101 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 of the first outlet 301 along the tangential 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 to realize rotational flow, and the other part of the fluid can flow onto the cavity wall surface of the valve cavity 101 from the first outlet 301 and then realize rotational flow under the guiding action of the cavity wall surface of the valve cavity 101 and the guiding action of the front part of the fluid.

In order to further enhance the swirling effect, as shown in fig. 5, in an embodiment of the present application, the central axis of the first outlet 301 is located outside the flow guiding structure 400 on the projection of the radial cross section of the valve body 100.

So set up, can make the degree of staggering of first export 301 and water conservancy diversion structure 400 bigger for fluid from first export 301 can flow through from water conservancy diversion structure 400 with one side, thereby can avoid the fluid to flow through respectively from water conservancy diversion structure 400 both sides and cause the condition of interfering the turbulent flow, so, just can further promote the carding guide effect to the fluid, make the whirl effect of fluid more even, thereby can reach better noise reduction effect.

In one embodiment of the present application, as shown in FIG. 3, the chamber wall of the flow guiding chamber 401 is provided with a first guiding slope 402 at the end far from the valve port 102.

In this embodiment, the first guiding inclined surface 402 may play a role in transition guiding when the fluid in the valve cavity 101 flows into the guiding cavity 401, specifically, the first guiding inclined surface 402 is inclined from one end far from the valve port 102 to one end close to the valve port 102 toward the center of the valve cavity 101, so that the fluid can swirl from the outside to the inside, and the resistance is smaller.

In an embodiment of the present application, as shown in fig. 3, the outer peripheral surface of the flow guiding structure 400 is provided with a second guiding inclined surface 403 at an end away from the valve port 102.

In this embodiment, the second guiding inclined surface 403 is inclined from the end close to the valve port 102 to the end far from the valve port 102 toward the center of the valve cavity 101, so as to guide the fluid flowing from the first outlet 301 to the end of the guiding structure 400, thereby enabling the fluid to enter the guiding cavity 401 more smoothly, and reducing the fluid resistance.

In one embodiment of the present application, as shown in FIGS. 3 and 4, the radial clearance between the cavity wall defining the flow guiding cavity 401 and the outer wall of the valve needle 200 is L, and the inner diameter of the valve port 102 is D1, so that L is larger than or equal to 0.5D1.

It can be understood that the fluid in the valve cavity 101 may be guided by the guide cavity 401 before entering the valve port 102, and the valve needle 200 is located in the guide cavity 401, so that the fluid flows through a gap between a cavity wall of the guide cavity 401 and an outer wall of the valve needle 200, and thus, a radial gap L between the cavity wall of the guide cavity 401 and the outer wall of the valve needle 200 cannot be too small, if the radial gap L is too small, throttling is easily caused to the fluid when the fluid does not reach the valve port 102, and flow control of the electronic expansion valve may be affected. Based on this, in this embodiment, the radial clearance L between the cavity wall of the flow guiding cavity 401 and the outer wall of the valve needle 200 is set to be greater than or equal to half of the inner diameter D1 of the valve port 102, so that the flow passing area of the flow guiding cavity 401 is not smaller than the flow passing area of the valve port 102, so that a throttling phenomenon is not caused to the fluid, and the accuracy of the electronic expansion valve in controlling the fluid flow is ensured.

In one embodiment of the present application, as shown in FIG. 3 and FIG. 4, the length of the diversion cavity 401 in the axial direction of the valve body 100 is defined as H, and the inner diameter of the valve port 102 is defined as D1, so that H is equal to or greater than D1.

It will be appreciated that the fluid in the valve chamber 101 may undergo guiding carding action by the guiding chamber 401 before entering the valve port 102, and if the length H of the guiding chamber 401 in the axial direction of the valve body 100 is too short, the guiding chamber 401 may not be able to get into the valve port 102 before guiding carding of the fluid, and the guiding effect is poor. Based on this, in this embodiment, the length H of the flow guiding cavity 401 in the axial direction of the valve body 100 is set to be greater than or equal to the inner diameter D1 of the valve port 102, so that the flow guiding cavity 401 has a sufficient length to guide and comb the fluid, thereby prolonging the flow guiding length and ensuring a good flow guiding effect.

In one embodiment of the present application, as shown in FIGS. 4 and 5, the first outlet 301 is defined as having an inner diameter D2 and the valve port 102 has an inner diameter D1, such that D2 is equal to or greater than D1.

It will be appreciated that the fluid in the first connection tube 310 enters the valve chamber 101 through the first outlet 301, and if the inner diameter D2 of the first outlet 301 is too small, throttling is easily caused at the first outlet 301, which affects the control of the flow rate by the electronic expansion valve. In this embodiment, the inner diameter D2 of the first outlet 301 is set to be not smaller than the inner diameter D1 of the valve port 102, so that the flow area of the first outlet 301 is not smaller than the flow area of the valve port 102, thereby avoiding throttling phenomenon on the fluid and ensuring the accuracy of the electronic expansion valve in controlling the fluid flow.

In an embodiment of the present application, as shown in fig. 1 and 5, the first adapter tube 310 is disposed eccentrically to the valve chamber 101, and the first outlet 301 is provided at an axial end portion of the first adapter tube 310.

In this embodiment, the first connecting tube 310 is directly arranged eccentrically to the valve cavity 101, and the orifice at the end of the first connecting tube 310 is the first outlet 301, so that the central axis of the first outlet 301 is staggered with the central axis of the valve port 102 only by installing the first connecting tube 310 on the valve body 100, and the other parts (such as the side wall of the tube) on the first connecting tube 310 are not required to be additionally provided with outlets, thereby simplifying the forming process and improving the production efficiency.

In practical applications, the first connection tube 310, which is disposed eccentrically to the valve chamber 101, may or may not extend into the valve chamber 101.

In an embodiment of the present application, as shown in fig. 2 and 3, the valve body 100 includes a valve seat 110 and a valve seat 120, the valve seat 110 is provided with a valve cavity 101, the first connecting tube 310 is disposed on a side wall of the valve seat 110, the valve seat 120 is disposed on an axial end portion of the valve seat 110, the valve seat 120 is provided with a valve port 102, and the flow guiding structure 400 is disposed on the valve seat 120, where the valve seat 120 and the valve seat 110 are in an integral structure or a split structure.

The present embodiment exemplifies the structure of the valve body 100, the valve cavity 101 is formed in the valve seat 110, and the valve needle 200, the screw, the nut, and the like are mounted in the valve seat 110. Valve port seat 120 is disposed at an axial end of valve seat 110, and valve port 102 is disposed on valve port seat 120 for insertion or removal of valve needle 200 to regulate flow. In practical applications, the valve seat 120 and the valve seat 110 may be integrally formed, or may be separately formed, and the specific structural manner thereof is not limited herein. When the structure is an integrated structure, the structure can be manufactured by processes such as die forming integrated molding, 3D printing integrated molding and the like. When the structure is in a split structure, the structure can be assembled and fixed in a welding, clamping or interference connection mode after being formed separately.

In this embodiment, the flow guiding structure 400 is disposed on the valve port seat 120, so that fluid in the valve cavity 101 flows to the valve port 102 after being guided and combed by the flow guiding cavity 401, thereby achieving better flow guiding and combing effects on the fluid and further reducing fluid noise.

It is appreciated that the connection between the flow guiding structure 400 and the valve seat 120 may be according to practical situations, for example, the flow guiding structure and the valve seat may be integrally formed, or the flow guiding structure and the valve seat may be fixed by welding or interference after being formed separately. In practical application, considering factors such as processing difficulty and assembly mode, as an exemplary structure, the flow guiding structure 400 and the valve port seat 120 are integrated, so that the forming process can be simplified, and the assembly steps can be reduced.

The utility model also provides a refrigeration device, which comprises an electronic expansion valve, and the specific structure of the electronic expansion valve refers to the embodiment, and because the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. The refrigerating device can be an air conditioner or a refrigerator.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (13)

1. An electronic expansion valve, comprising:

The valve body is provided with a valve cavity and a valve port communicated with the valve cavity, and the valve port is arranged at one axial end of the valve body;

The flow guide structure is arranged in the valve cavity and is provided with a flow guide cavity communicated with the valve cavity and the valve port, the extending direction of the flow guide cavity is consistent with the extending direction of the central axis of the valve port, and

The first connecting pipe is arranged on the side wall of the valve body and is provided with a first outlet communicated with the valve cavity, and the central axis of the first outlet is not intersected with the central axis of the valve cavity, so that fluid flowing in from the first outlet can swirl in the valve cavity to the diversion cavity.

2. The electronic expansion valve of claim 1, further comprising a valve needle disposed within said valve cavity, said valve needle being axially extendable into and movable away from said valve port;

The guide structure is sleeved outside the valve needle and is connected with the wall surface of the valve port arranged on the valve body, so that the guide cavity is arranged around the periphery of the valve needle.

3. The electronic expansion valve of claim 2, wherein the cavity wall surface of the flow guiding cavity is an arc surface, the flow guiding cavity and the valve needle are coaxially arranged, and the flow guiding cavity is annular in radial section of the flow guiding structure.

4. The electronic expansion valve according to any one of claims 1 to 3, wherein the outer peripheral surface of the flow guiding structure is an arc surface, the cavity wall surface of the valve cavity is an arc surface, and the outer peripheral surface of the flow guiding structure is coaxially arranged with the cavity wall surface of the valve cavity.

5. The electronic expansion valve of claim 4, wherein a sidewall of said first outlet remote from a center of said valve chamber is tangential to a chamber wall surface of said valve chamber in a projection of a radial cross section of said valve body.

6. The electronic expansion valve of claim 5, wherein a central axis of the first outlet is located outside of the flow directing structure in a projection of a radial cross section of the valve body.

7. The electronic expansion valve of any of claims 1 to 3, wherein a chamber wall of said flow directing chamber is provided with a first flow directing ramp at an end remote from said valve port;

And/or the outer peripheral surface of the flow guiding structure is provided with a second guide inclined surface at one end far away from the valve port.

8. The electronic expansion valve of claim 2 or 3, wherein a radial clearance between a cavity wall defining the flow guiding cavity and an outer wall of the valve needle is L, and an inner diameter of the valve port is D1, and L is not less than 0.5D1.

9. The electronic expansion valve of any of claims 1 to 3, wherein the length of the flow directing chamber in the axial direction of the valve body is defined as H, and the inner diameter of the valve port is defined as D1, such that H is greater than or equal to D1.

10. The electronic expansion valve of any of claims 1-3, wherein the first outlet is defined as having an inner diameter D2 and the valve port has an inner diameter D1, such that D2 is greater than or equal to D1.

11. An electronic expansion valve according to any one of claims 1 to 3, wherein the first nipple is arranged eccentrically to the valve chamber, and the first outlet is arranged at an axial end of the first nipple.

12. An electronic expansion valve according to any one of claims 1 to 3, wherein the valve body comprises:

a valve seat provided with the valve cavity, the first connecting pipe arranged on the side wall of the valve seat, and

The valve seat is arranged at the axial end part of the valve seat, the valve seat is provided with the valve port, and the flow guide structure is arranged on the valve seat, wherein the valve seat and the valve seat are of an integrated structure or a split structure.

13. A refrigeration device comprising an electronic expansion valve according to any one of claims 1 to 12.