Valve body assembly and electronic expansion valve

Abstract

The valve body assembly comprises a valve body and a flow guide valve seat, the valve body is provided with an upper opening, a side face connector and a lower connector which are oppositely arranged, the flow guide valve seat is provided with an upper opening and a lower center opening which are oppositely arranged, the lower center opening of the flow guide valve seat is a valve hole, and the valve hole is communicated with the side face connector. At least one eccentric flow guide hole is formed in the side face of the upper portion of the flow guide valve seat, the bottom of an inner cavity of the flow guide valve seat is funnel-shaped, the flow guide valve seat is arranged in the valve body, and the lower portion of the flow guide valve seat is inserted into or penetrates through a lower connector of the valve body and welded to the valve body. According to the electronic expansion valve adopting the technical scheme, the reliability and stability of the electronic expansion valve can be improved, fluid does not directly impact the valve needle when entering the valve body assembly, the fluid spirally flows through the valve port, vibration of the valve needle is reduced, and noise of the fluid in the valve body is reduced; the fluid flows reversely and enters the valve body through the valve hole, the channel is gradually expanded, flowing howling noise is reduced, and therefore the problem that in the prior art, an electronic expansion valve is large in noise can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control components, in particular to a valve body and an electronic expansion valve having the same. Background Art

[0002] In the field of fluid control, the electronic expansion valve is a component that controls the flow of fluid. The electronic expansion valve uses a pulse input power supply to control the rotation of the magnetic rotor assembly of the stepper motor, and the magnetic rotor assembly drives the valve needle placed on the rotor to move axially through the thread transmission, thereby controlling the flow of fluid passing through the valve.

[0003] During the use of the electronic expansion valve, the fluid flows into the accommodating chamber of the electronic expansion valve and then flows out from the valve port. When the fluid passes through the electronic expansion valve, it will generate a large noise, mainly including flow noise and mechanical noise. Mechanical noise is mainly caused by the collision between the valve needle and the valve port due to the unexpected movement of the valve needle. Flow noise is mainly caused by the abnormal local resistance in the electronic expansion valve body, which makes the internal pressure of the fluid unbalanced and causes the fluid micro-group vortex, thereby generating flow noise. In the prior art, the noise is generally reduced by adjusting the valve port, the valve needle assembly and the internal structure of the valve body, but the effect is not ideal. The main reason is that the root cause of the noise in the electronic expansion valve is not very clear. The internal space of the electronic expansion valve is small, the flow channel is relatively complex, and the local resistance influence is superimposed, resulting in uneven force on each fluid micro-group, which is the source of the flow noise and also causes uneven force on the valve needle in all directions. In addition, the inlet flow of the expansion valve impacts the valve stem, causing the valve needle to collide with the valve port to generate mechanical noise. The existing structures have not been able to effectively reduce the noise generated by the electronic expansion valve as a whole.

[0004] Therefore, how to improve the reliability of the structure and operation of the electronic expansion valve, reduce the noise inside the valve, and increase the life span is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a valve body assembly and an electronic expansion valve having the same, so as to solve the problem of high noise of the electronic expansion valve in the prior art. To this end, the utility model adopts the following technical solutions:

[0006] To this end, the first aspect of the utility model provides a valve body assembly. The second aspect of the utility model provides an electronic expansion valve.

[0007] According to one aspect of the utility model, a valve body assembly is provided, which includes a valve body and a guide valve seat, the valve body having an upper opening, a side interface and a lower interface that are relatively arranged, the lower interface is located at the center of the bottom of the valve body, the guide valve seat has an upper opening and a lower center opening that are relatively arranged, at least one eccentric guide hole is arranged on the upper side of the guide valve seat, the guide valve seat can be an integrated structure or a split combination structure, the lower center opening of the guide valve seat is a valve hole, the guide valve seat is placed in the valve body, the lower part of the guide valve seat is inserted into or passes through the lower interface of the valve body, and is welded and fixed to the valve body.

[0008] The eccentric guide hole and the guide valve seat can be eccentrically orthogonal, or eccentrically oblique.

[0009] The position of the eccentric guide hole can be set arbitrarily.

[0010] The relative positions of the eccentric guide holes can also be set arbitrarily.

[0011] Preferably, the eccentric guide hole is tangent to or approximately tangent to the inner wall of the guide valve seat.

[0012] Preferably, when the number of the eccentric guide holes is more than one, the eccentric directions of all the eccentric guide holes are consistent and arranged in the same circular direction, for example, simultaneously counterclockwise or simultaneously clockwise.

[0013] Preferably, when the number of the eccentric guide holes is greater than one, the eccentric guide holes are evenly spaced.

[0014] When the number of the eccentric flow guide holes is greater than one, the apertures of the eccentric flow guide holes may be the same or different.

[0015] When the number of the eccentric flow guide holes is greater than one, the distances from the eccentric flow guide holes to the upper opening of the flow guide valve seat may be the same or different.

[0016] A step may be provided at the lower middle portion of the exterior of the guide valve seat to facilitate positioning of the guide valve seat for cooperation with the lower interface of the valve body.

[0017] The bottom of the inner cavity of the guide valve seat is an annular plane or a funnel shape, or there is a curved surface transition between the inner cavity side of the guide valve seat and the valve hole.

[0018] Preferably, the bottom of the inner cavity of the guide valve seat is funnel-shaped or there is a curved transition between the rotary curved surface of the inner cavity side of the guide valve seat and the valve hole.

[0019] The lower center opening of the guide valve seat is set as a valve hole, and the valve hole is in the shape of a Venturi tube, or the inlet and outlet sections of the valve hole are flares formed by a revolution curved surface, or trumpet flares or nozzles, or the outlet section of the valve hole is a flare formed by a revolution curved surface, or trumpet flares or nozzles, such as a Venturi nozzle, etc. The lower interface of the valve body assembly is connected to the fluid pipeline.

[0020] The inner cavity side surface and bottom surface of the guide valve seat are respectively composed of revolution curved surfaces.

[0021] The inner cavity of the guide valve seat can be composed of multiple sections of revolution curved surfaces from the side surface to the bottom surface.

[0022] The inner cavity surface of the guide valve seat may also be a continuous revolution curved surface.

[0023] The flow guide valve seat can also be a combination of a flow guide cover and a valve seat matched therewith, the valve seat is inserted or passed through the lower interface of the valve body, the central opening of the valve seat is a valve hole, the outer outlet of the valve hole is a flared opening or a trumpet flared opening or a nozzle formed by a revolving curved surface, the surface of the flow guide cover is a continuous or discontinuous revolving curved surface, the bottom of the inner cavity of the valve seat is an annular plane or a funnel shape, or the revolving curved surface on the side of the inner cavity of the flow guide valve seat and the valve hole are transitioned by a curved surface, the flow guide cover is connected with the part of the valve seat in the valve body, at least one eccentric flow guide hole is arranged on the flow guide cover, and the flow guide cover can be made of metal or non-metal; the flow guide cover and the valve seat can be nested with each other, or can be threaded or snap-fitted or welded or connected in other forms. The upper part of the flow guide cover can be pressed by other components of the installed electronic expansion valve. The flow guide valve seat structure composed of the flow guide cover and the valve seat is placed in the valve body, the lower part of the valve seat is inserted into or passes through the lower interface of the valve body and is welded to form a whole, and the lower part of the valve body assembly is connected to the fluid pipeline. The flow guide cover and the valve seat can also be composed of one or more structures respectively.

[0024] The side surface of the inner cavity of the valve body is a revolution curved surface, which can be a continuous or discontinuous revolution curved surface, and the bottom of the inner cavity can be an annular plane or a funnel shape.

[0025] The upper opening of the valve body is connected to the valve cover of the electronic expansion valve and other components for installing the electronic expansion valve.

[0026] The side interface of the valve body is a through hole for fluid, which is connected to a fluid pipeline.

[0027] The valve body may have any three-dimensional shape.

[0028] A second aspect of the utility model provides an electronic expansion valve, which includes: a valve body assembly structure as in any of the above technical solutions.

[0029] The valve body assembly structure and the electronic expansion valve provided by the utility model can improve the reliability and working stability of the electronic expansion valve. The fluid entering the valve body assembly does not directly impact the valve needle, and the spiral passes through the valve port to reduce the vibration of the valve needle. The curved surface of the inner wall of the guide valve seat reduces the local resistance, thereby reducing the flow noise of the fluid in the valve body. In addition, the fluid flows in the opposite direction into the valve body through the valve hole, the fluid channel is gradually expanded, the movement law of the fluid micro-groups will not suddenly change, and the flow whistling noise will also be weakened. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0031] In the attached picture:

[0032] Figure 1 It is a cross-sectional schematic diagram of a first embodiment of the valve body assembly structure provided by the utility model;

[0033] Figure 2 It is a cross-sectional schematic diagram of a second embodiment of the valve body assembly structure provided by the utility model;

[0034] In the figure: 1. valve body, 2. guide valve seat, 3. valve body side interface, 4. eccentric guide hole, 5. valve hole, 6. valve body, 7. guide cover, 8. valve seat, 9. valve body side interface, 10. eccentric guide hole, 11. valve seat valve hole. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and therefore, the protection scope of the utility model is not limited by the specific embodiments disclosed below.

[0036] Refer to the following Figure 1 to Figure 2 The valve body assembly structure and the electronic expansion valve according to some embodiments of the present utility model are described.

[0037] Embodiment 1

[0038] See also Figure 1 .

[0039] First, the valve body 1 and the guide valve seat 2 are roughly machined by mechanical processing equipment, and then the inner surface curved surface, upper opening, lower interface and side interface 3 of the valve body 1 are processed, and the inner and outer surface curved surfaces, upper opening, 4 eccentric guide holes 4 evenly spaced or symmetrically arranged and arranged in the same order and valve hole 5 of the guide valve seat 2 are processed, and then the guide valve seat 2 is placed in the valve body 1, and the lower part of the guide valve seat 2 is inserted from the inside of the valve body 1 and passes through the lower interface of the valve body 1, the fluid pipeline is put on the outer periphery of the outer outlet of the valve hole 5 and welded and sealed together with the valve body 1, and the fluid pipeline is inserted into the side interface 3 of the valve body and welded and sealed.

[0040] Embodiment 2

[0041] See also Figure 2 .

[0042] The valve body 6, the flow guide cover 7 and the valve seat 8 are processed separately: including the inner surface curved surface of the valve body 6, the upper opening, the lower interface, the side interface 9 of the valve body 6, the inner and outer surfaces of the valve seat 8, each matching surface and the valve hole 11, and the inner and outer surfaces of the flow guide cover 7, each matching surface and 4 eccentric flow guide holes 10 arranged evenly at intervals and in the same order, and then the processed valve seat 8 is placed in the valve body 6, and the lower part of the valve seat 8 is inserted from the inside of the valve body 6 and passes through the lower interface of the valve body 6, the fluid pipeline is sleeved on the outer periphery of the outer outlet of the valve hole 11 of the valve seat 8 and welded and sealed with the valve body 6, the fluid pipeline is inserted into the side interface 9 of the valve body 6 and welded and sealed, and then the flow guide cover 7 is placed in the valve body and nested and matched with the upper part of the valve seat 8.

[0043] The utility model also provides an electronic expansion valve, comprising the valve body assembly described in any one of the above embodiments, wherein the upper opening of the valve body is connected to a valve cover of the electronic expansion valve and other components for installing the electronic expansion valve.

[0044] The above describes in detail a valve body assembly and two implementation schemes of an electronic expansion valve provided by the utility model. Two specific examples are used in this paper to illustrate the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement of the components and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered as part of the authorization specification.

[0047] In the description of the present invention, it needs to be understood that the orientation or position relationship indicated by directional words such as "up, down, left, right" and "upper, lower, side, bottom, bottom" is usually based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0048] In addition, it should be noted that the use of words such as "first", "then", and "again" to limit the processing order is only for the convenience of describing the present utility model. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the present utility model.

[0049] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

[0050] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A valve body assembly, comprising a valve body and a guide valve seat, wherein the valve body has an upper opening, a side interface and a lower interface which are arranged relatively, and the guide valve seat has an upper opening and a lower central opening which are arranged relatively, wherein the lower interface is located at the center of the bottom of the valve body, and the lower central opening of the guide valve seat is a valve hole, characterized in that: At least one eccentric guide hole is arranged on the upper side of the guide valve seat, the guide valve seat is placed in the valve body, and the lower part of the guide valve seat is inserted into or passes through the lower interface of the valve body.

2. The valve body assembly according to claim 1, characterized in that: The guide valve seat is either an integrated structure or a split combined structure.

3. The valve body assembly according to claim 1, characterized in that: The eccentric guide hole and the guide valve seat are eccentrically orthogonal or eccentrically oblique.

4. The valve body assembly according to claim 1, characterized in that: The eccentric guide holes have the same or different apertures.

5. The valve body assembly according to claim 1, characterized in that: The distances from the eccentric guide hole to the upper opening of the guide valve seat are the same or different.

6. The valve body assembly according to claim 1, characterized in that: The side surface and bottom surface of the inner cavity of the diverter valve seat are respectively composed of revolving curved surfaces, or the inner cavity of the diverter valve seat from the side surface to the bottom surface is composed of multiple sections of revolving curved surfaces, or the inner cavity surface of the diverter valve seat is a continuous revolving curved surface.

7. The valve body assembly according to claim 1, characterized in that: The bottom of the inner cavity of the guide valve seat is an annular plane or a funnel shape, or there is a curved surface transition between the side rotation curved surface of the inner cavity of the guide valve seat and the valve hole.

8. The valve body assembly according to claim 2, characterized in that: The guide valve seat is a split combined structure, which is composed of a guide cover and a valve seat matched therewith. The guide cover is provided with at least one eccentric guide hole, the central opening of the valve seat is a valve hole, and the guide cover is made of metal or non-metal.

9. The valve body assembly according to claim 8, characterized in that: The flow guide cover and the valve seat are respectively composed of one or more structures.

10. An electronic expansion valve, characterized in that: include: A valve body assembly structure as claimed in any one of claims 1 to 9.

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