CN217929303U - Valve seat nut assembly of electronic expansion valve - Google Patents

Abstract

The utility model discloses a valve seat nut component of an electronic expansion valve, which comprises a valve seat, wherein a valve cavity with an opening at one end is formed inside the valve seat; the nut is arranged at the opening of the valve cavity; the insert is fixedly arranged on the outer side of the nut, and the insert is embedded into the opening of the valve cavity and is pressed together with the valve seat. The utility model discloses can avoid influencing the bulk strength of disk seat, nut component in assembling process to the effectual quality that improves the product has ensured the performance function of product, solves the problem among the prior art.

Description

Valve seat nut component of electronic expansion valve

Technical Field

The utility model relates to an electronic expansion valve field specifically is an electronic expansion valve's disk seat nut component.

Background

Energy conservation and emission reduction are problems to be solved urgently by people nowadays. The throttling device plays a key role in the refrigeration system, and the energy consumption of the whole refrigeration system can be reduced by selecting a proper throttling mechanism to be matched with the refrigeration system. The working principle of throttling is that when the refrigerant flows through the valve, the flow section is suddenly contracted, the flow speed of the fluid is accelerated, and the pressure is reduced, so that the functions of regulating the flow, controlling the superheat degree and evaporating the liquid level are achieved. Therefore, the flow regulation of the throttling mechanism plays an important role in saving energy and reducing consumption of the refrigerating device. On some occasions with severe load change or wide operation condition range, the traditional throttling elements (such as capillary tubes, thermal expansion valves and the like) cannot meet the requirements on comfort and energy conservation. The temperature sensing package of the thermostatic expansion valve has obvious delay characteristic, and is difficult to cooperate with the displacement of the compressor to make quick and effective reaction to the flow change, finally resulting in the oscillation of system regulation, causing unstable machine operation, even damaging the compressor network, so the electronic expansion valve is gradually replacing the traditional throttling element. The electronic expansion valve is superior to the traditional throttling mechanism in superheat degree control (liquid level control) and flow regulation, and has the advantages of higher reaction speed, wider regulation range, more obvious energy-saving effect and wide application prospect.

The valve seat and nut component structure in the existing electronic expansion valve comprises a valve seat and a nut, wherein the valve seat and the nut are assembled by laser welding after being pressed and installed. During the laser welding equipment, carry out laser welding through inserts lower extreme edge on the nut component and disk seat upper end edge, this mode probably has the welding insecure, during laser welding, also can lead to disk seat edge deformation, leads to disk seat, nut component overall structure stability to have the problem, has the risk that drops, if drop after the assembly finished product, the performance of direct influence whole valve can't accomplish normal ooff valve action, promotes the defective rate, even after the product loading, causes the risk of recalling.

Therefore, in order to solve the technical problems, a novel valve seat and nut assembly structure is provided.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve's disk seat nut component can avoid influencing disk seat, nut component's bulk strength in assembly process to the effectual quality that improves the product has ensured the performance function of product, solves the problem among the prior art.

In order to achieve the above purpose, the utility model provides a following technical scheme: a valve seat nut component of an electronic expansion valve comprises a valve seat, wherein a valve cavity with an opening at one end is formed inside the valve seat; the nut is arranged at the opening of the valve cavity; the inserts are fixedly arranged on the outer side of the nuts, the inserts are embedded into the opening of the valve cavity and are pressed on the valve seat, the nuts are combined with the valve seat through the inserts, the press-fitting is firmly connected through the inserts, the whole parts are fewer, the assembly is more convenient, the weight is reduced, the quality is better, and the cost is more advantageous.

Preferably, the insert is annular and is sleeved outside the nut, and the contact area between the annular insert and the valve seat is large, so that riveting fixation is facilitated.

Preferably, the insert and the nut are integrally injection-molded, so that the bonding strength between the insert and the nut can be ensured.

Preferably, the edge of the insert is provided with a plurality of first vent grooves, the side wall of the nut side is provided with a second vent groove corresponding to the first vent grooves, the first vent grooves and the second vent grooves enable the valve cavity to be communicated with the outside, meanwhile, the bottom of the valve seat is provided with a balance air passage communicated with the outside, the balance air passage enables fluid media to fill the upper cavity of the whole valve seat assembly, so that the pressure difference between high pressure and low pressure at the inlet and the outlet of the valve cavity is reduced, the first vent grooves and the second vent grooves can not only guarantee the self strength of the nut and the insert, but also guarantee the balance of air pressure by matching with the balance air passage.

Preferably, a circle of limiting steps are arranged on the outer side of the nut, the insert is located on one side of the limiting steps, the limiting steps are attached to the side wall of the valve cavity, the second ventilation groove is formed in the limiting steps, the limiting steps can limit the axial position of the insert, and meanwhile the limiting steps and the side wall of the valve cavity are attached to have a guiding effect when in press fitting.

Preferably, a press-fitting groove is formed in an opening of the valve cavity, the insert is embedded into the press-fitting groove, the height of the side wall of the press-fitting groove is larger than the thickness of the insert, a blank pressing part is formed at a part, higher than the insert, of the side wall of the press-fitting groove to press and fix the insert, the press-fitting groove can be used for positioning the insert, the blank pressing part can be used for press-fitting deformation, the insert is pressed conveniently, and firm connection is guaranteed.

Preferably, the inner hole of the insert is provided with a plurality of grooves, the grooves can be filled when the insert and the nut are integrally molded by injection, the bonding strength between the insert and the nut is improved, and the insert and the nut cannot rotate.

Compared with the prior art, the beneficial effects of the utility model are that:

the integrated insert and nut structure is adopted, the firm connection between the nut and the valve seat is realized by pressing the insert and the valve seat, the integration degree of the whole structure of the valve seat and the nut assembly is high, the number of parts is small, the assembly is more convenient, the light weight is facilitated, the quality is better, and the cost is more advantageous; and vent grooves are arranged on the insert and the nut so as to reduce the pressure difference between high pressure and low pressure at the inlet side and the outlet side.

Drawings

FIG. 1 is a front sectional view of the structure of the present invention;

FIG. 2 is a perspective view of the present invention;

FIG. 3 is a view of the structure of the nut and insert of the present invention;

fig. 4 is a structural view of the insert of the present invention.

Reference numerals:

1. the nut, 11, second air channel, 12, spacing step, 2, inserts, 21, first air channel, 22, recess, 3, valve seat, 31, blank holder portion, 32, balanced air flue, 33, valve pocket, 34, pressure equipment groove.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

As shown in fig. 1-4, the utility model provides a solve the problem that the connection between nut component and the valve seat is insecure, can lead to the valve seat edge to warp among the current electronic expansion valve, provide following technical scheme: a valve seat nut component of an electronic expansion valve comprises a valve seat 3, wherein a valve cavity 33 with an opening at one end is formed in the valve seat 3; the nut 1 is arranged at the opening of the valve cavity 33; insert 2, the fixed outside that sets up at nut 1, insert 2 the opening part that imbeds into valve pocket 33 be in the same place with the pressure equipment of disk seat 3, nut 1 combines together through insert 2 and disk seat 3, realizes the pressure equipment firm connection through insert 2, whole spare part is less, the equipment is more convenient, is favorable to the lightweight, the better quality, the cost is more advantageous.

Specifically, nut 1 links to each other with disk seat 3 from the one end opening side of disk seat 3, and a tip of nut 1 is arranged in valve chamber 33, and inserts 2 adopts metalwork or other high strength material to make, can realize being connected with the pressure equipment of disk seat 3, and inserts 2 is the platykurtic, and the pressure equipment is convenient, inserts 2 the opening part that is embedded into valve chamber 33 together with the pressure equipment of disk seat 3, nut 1 combines together with disk seat 3 through inserts 2, and the rethread inserts 2 realizes turn-ups riveting dress firm connection.

In this embodiment, the insert 2 is annular, and it cup joints in the outside of nut 1, and the area of contact between annular insert 2 and the disk seat 3 is big, is favorable to carrying out the riveting fixed, and the hole of insert 2 can be embedded into in the lateral wall of nut 1. Wherein, inserts 2 and nut 1 can adopt integrative injection moulding, can guarantee the bonding strength between inserts 2 and the nut 1, just wrap up around inserts 2's hole in 1 injection moulding of nut, in addition, inserts 2's hole on be provided with a plurality of recess 22, recess 22 can fill when inserts 2 and 1 integrative injection moulding of nut, improves the bonding strength between inserts 2 and the nut 1, can't rotate between inserts 2 and the nut 1.

In this embodiment, the edge of the insert 2 is provided with a plurality of first vent grooves 21, the side wall of the nut 1 is provided with a second vent groove 11 corresponding to the first vent groove 21, the first vent groove 21 and the second vent groove 11 enable the valve cavity 33 to be communicated with the outside, meanwhile, the bottom of the valve seat 3 is provided with a balance air passage 32 communicated with the outside, the balance air passage 32 enables a fluid medium to fill the upper cavity of the whole valve seat assembly, so as to reduce the pressure difference between the high pressure and the low pressure at the two sides, the first vent groove 21 and the second vent groove 11 not only can ensure the self strength of the nut 1 and the insert 2, but also can ensure the balance of air pressure by matching with the balance air passage 32.

Meanwhile, the outer side of the nut 1 is provided with a circle of limiting steps 12, the insert 2 is located on one side of the limiting steps 12, the limiting steps 12 are tightly attached to the side wall of the valve cavity 33, the second vent grooves 11 are formed in the limiting steps 12, the limiting steps 12 can limit the axial position of the insert 2, and meanwhile the limiting steps 12 and the side wall of the valve cavity 33 are tightly attached to have a guiding effect in the press mounting process.

In this embodiment, for the convenience of carrying out the pressure equipment to inserts 2 and valve seat 3, the opening part of valve pocket 33 be provided with a pressure equipment groove 34, inserts 2 embedding install in pressure equipment groove 34, the lateral wall height of pressure equipment groove 34 be greater than inserts 2's thickness, the part that the lateral wall in pressure equipment groove 34 is higher than inserts 2 form pressure limit portion 31 and push down fixedly inserts 2, pressure equipment groove 34 can be fixed inserts 2, pressure limit portion 31 can carry out the pressure equipment deformation, pushes down inserts 2 in the same place, guarantees firm connection.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless expressly specified otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Claims (7)

1. A seat nut assembly for an electronic expansion valve, comprising:

the valve seat (3), the inside of the valve seat (3) forms a valve cavity (33) with one open end;

the nut (1) is arranged at the opening of the valve cavity (33);

the insert (2) is fixedly arranged on the outer side of the nut (1), and the insert (2) is embedded into an opening of the valve cavity (33) and is pressed with the valve seat (3).

2. The valve seat nut assembly of an electronic expansion valve of claim 1, wherein: the insert (2) is in a circular ring shape and is sleeved on the outer side of the nut (1).

3. The valve seat nut assembly of an electronic expansion valve of claim 2, wherein: the insert (2) and the nut (1) are integrally formed by injection molding.

4. The valve seat nut assembly of an electronic expansion valve of claim 2, wherein: the edge of inserts (2) be provided with a plurality of first air channel (21), nut (1) side lateral wall on be provided with second air channel (11) that correspond with first air channel (21), first air channel (21) and second air channel (11) make valve pocket (33) be linked together with the external world, simultaneously, the bottom of disk seat (3) be provided with the balanced air flue (32) of intercommunication external world.

5. The valve seat nut assembly of an electronic expansion valve of claim 4, wherein: the nut (1) outside be provided with round spacing step (12), inserts (2) be located one side of spacing step (12), spacing step (12) hug closely with the lateral wall of valve pocket (33), just second air channel (11) set up on spacing step (12).

6. The valve seat nut assembly of an electronic expansion valve of claim 1, wherein: the opening of the valve cavity (33) is provided with a press-fitting groove (34), the insert (2) is embedded into the press-fitting groove (34), the height of the side wall of the press-fitting groove (34) is larger than the thickness of the insert (2), and a part of the side wall of the press-fitting groove (34) which is higher than the insert (2) forms a press-edge part (31) to press and fix the insert (2).

7. The valve seat nut assembly of an electronic expansion valve of claim 2, wherein: the inner hole of the insert (2) is provided with a plurality of grooves (22).

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