CN217898793U - Electronic expansion valve - Google Patents

Abstract

The utility model discloses an electronic expansion valve, including valve body, valve port seat, valve seat body, nut seat, needle and rotor subassembly, the valve body includes the first chamber and the third chamber of a high one-height low distribution, communicates the second chamber of first chamber and third chamber, valve seat body and valve port seat can dismantle the connection setting from top to bottom, and the second chamber is packed into in the lump into with the valve port seat to the valve seat body, first chamber and valve port seat, third chamber intercommunication form the runner, the nut seat stretches into the valve seat body and links firmly with the valve seat body, the rotor subassembly spiro union can follow the nut seat at nut seat outer wall and go up and down, the needle activity stretches into the valve port seat after passing rotor subassembly, nut seat, the rotor subassembly drives the needle and goes up and down and close or communicate the runner. The utility model has the advantages of reasonable design, accurate and low in production cost of runner size control to be favorable to the production preparation of different specification products, reduce the inventory cost of different specification products, reduce cost of maintenance.

Description

Electronic expansion valve

Technical Field

The utility model relates to a refrigeration control technical field especially relates to an electronic expansion valve.

Background

The electronic expansion valve is a throttling element in a refrigeration system, and the size of a channel between the valve needle and a valve port is changed by driving the rotor and the valve needle to move up and down through the coil, so that the flow rate is adjusted. The patent with publication number CN104344050A discloses an electronic expansion valve, which comprises a valve body, a valve seat component detachably mounted on the valve body, and a rotor assembly mounted on the valve seat component, wherein the valve body comprises an inlet channel, an outlet channel, and a middle channel communicating the inlet channel and the outlet channel, the valve seat component is mounted and fixed in the middle channel, the valve seat component comprises a valve port part, the valve port part is provided with a valve port communicating with the outlet channel and a through hole communicating with the inlet channel, the rotor assembly comprises a valve needle matching with the valve port, the valve body is provided with a first thread positioned in the middle channel, the valve seat component is provided with a fixing part, and the fixing part is provided with a second thread screwed with the first thread; the vibration resistance between the valve seat component and the valve body is improved through the mounting mode of threaded connection. The valve seat component in the patent is of an integrally formed structure, which is also the conventional structure of the valve seat component in the prior art, however, the integrally formed valve seat component has relatively high processing precision, a relatively complex mold structure and poor overall universality of the valve seat component, namely, an integral valve seat component with a corresponding valve port specification is required to be prepared when an electronic expansion valve with one specification is produced, the production preparation of products with different specifications is not facilitated, the inventory cost of products with different specifications is increased, and once the valve seat component is partially damaged, the integral valve seat component needs to be integrally replaced, so that the maintenance cost is increased; in addition, the valve needle and the retaining rod of the electronic expansion valve are connected with the rotor by laser welding, so that the defects of high equipment investment and high process operation cost (the whole set of laser welding equipment is sold at a price of over 15 ten thousand) exist, and the effective control of the production cost is not facilitated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide an electronic expansion valve, structural design is reasonable, and accurate and low in production cost of runner size control to be favorable to the production preparation of different specification products, reduce the inventory cost of different specification products, reduce cost of maintenance.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model provides an electronic expansion valve, includes valve body, valve port seat, valve seat body, nut seat, needle and rotor subassembly, the valve body includes the first chamber and the third chamber of a high one-tenth low distribution, communicates the second chamber of first chamber and third chamber, valve seat body and valve port seat can dismantle the connection setting from top to bottom, and the second chamber is packed into in the lump into to the valve seat body and valve port seat, first chamber and valve port seat, third chamber intercommunication form the runner, the nut seat stretches into the valve seat body and links firmly with the valve seat body, the rotor subassembly spiro union can follow the nut seat and go up and down at nut seat outer wall, the needle activity passes and stretches into the valve port seat behind rotor subassembly, the nut seat, the rotor subassembly drives the needle and goes up and down and close or communicate the runner.

The valve seat body is connected with the valve port seat through threads.

The rotor subassembly includes the cavity rotor mold insert with nut seat cooperation spiro union, the needle passes the nut seat inner chamber after passing rotor mold insert top, needle upper portion cover is equipped with the valve needle cover, the valve needle cover can with the rotor mold insert crimping from top to bottom, the cover is equipped with the elastic component between needle and the nut seat, roof on the elastic component upper end butt joint to the rotor mold insert inner chamber.

The valve needle sleeve is fixedly sleeved on the upper part of the valve needle through riveting.

The needle includes protruding ring portion, elastic component lower extreme butt joint is to protruding ring portion, rotor insert inner chamber is equipped with the gasket that the cover was established outside the needle, and gasket crimping is between elastic component upper end and rotor insert inner chamber roof.

The electronic expansion valve further comprises a stopping rod, and the stopping rod is welded on the rotor insert through energy storage welding.

A plurality of salient points are distributed on the lower surface of the retaining rod and welded to the upper surface of the rotor insert through energy storage welding.

A guide sleeve is fixedly embedded in the upper portion of the valve port seat, and the valve needle penetrates through the guide sleeve in a fitting mode and can lift along the guide sleeve.

The lower part of the valve seat body is embedded into the upper part of the second cavity and is detachably connected with the second cavity, and the upper part of the valve seat body and the upper part of the second cavity are sealed through an upper sealing ring; the lower part of the valve port seat is embedded into the middle part of the second cavity in an attaching mode, and the lower part of the valve port seat and the inner wall of the second cavity are sealed through a lower sealing ring.

The utility model has the advantages that: the valve port seat and the valve seat body connecting structure which are detachably connected are adopted to form the valve port component, so that the valve seat body has universality, a part of the valve port component, namely the valve port seat, is used for replacing a complete valve port component to serve as a spare storage component of products with different specifications, electronic expansion valves with different specifications can be formed only by changing the valve port seat without preparing an integrated valve port component as in the prior art, the mold structure and the production process of the valve port component are simplified, the production preparation of the products with different specifications is facilitated, the inventory cost of the products with different specifications is reduced, and if the valve port seat or the valve seat body is damaged, the corresponding part is only required to be replaced without integrally replacing the valve port component, so that the maintenance cost is reduced; the valve needle and the valve needle sleeve are connected in a riveting mode, and the rotor and the stopping rod are welded through annular point energy storage welding; mainly utilize valve needle cover, elastic component cooperation to constitute limit structure from top to bottom make the needle stably hang and put on the rotor mold insert, the guide effect of rethread uide bushing realizes the rotor subassembly to the accurate adjustment control of needle position, accomplishes the accurate regulation of runner size.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a structural diagram of the valve body of the present invention;

FIG. 4 is a view showing the connection between the valve seat and the valve seat body according to the present invention;

figure 5 is a front view of the valve needle of the present invention;

fig. 6 is a bottom view of the retaining rod of the present invention.

In the figure: the valve body 1, the first cavity 11, the second cavity 12, the cavity a 121, the cavity B122, the cavity C123, the cavity D124, the third cavity 13, the upper seal ring 14, the lower seal ring 15, the valve port seat 2, the vertical cavity 21, the valve port 22, the upper opening 221, the middle opening 222, the lower opening 223, the transverse cavity 23, the valve seat body 3, the main seat body 31, the connecting portion 32, the nut seat 4, the valve needle 5, the convex ring portion 51, the concave ring portion 52, the needle portion 53, the elastic member 54, the valve needle sleeve 55, the gasket 56, the rotor assembly 6, the rotor insert 61, the through hole 611, the rotor 62, the check rod 7, the convex point 71, the guide sleeve 8, the housing 9 and the stopper 91.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1 to 6, an electronic expansion valve includes a valve body 1, a valve port seat 2, a valve seat body 3, a nut seat 4, a valve needle 5, and a rotor assembly 6, where the valve body 1 includes a first chamber 11 and a third chamber 13 which are distributed in a high-low manner, and a second chamber 12 which communicates the first chamber 11 with the third chamber 13. The second cavity 12 is vertically arranged, the upper end of the second cavity 12 penetrates through the valve body 1, the middle of the second cavity 12 is vertically communicated with the first cavity 11, and the lower part of the third cavity 13 is vertically communicated with the lower part of the second cavity 12. The first cavity 11 and the third cavity 13 are respectively located on two sides of the valve body 1 and are both transversely arranged, the first cavity 11 is an inlet channel of the electronic expansion valve, the third cavity 13 is an outlet channel, and the first cavity 11, the second cavity 12 and the third cavity 13 form a Z-shaped channel. Furthermore, the second cavity 12 is a multi-stage stepped cavity structure, the second cavity 12 includes a cavity a 121, a cavity B122, a cavity C123 and a cavity D124 which are sequentially communicated from top to bottom, the diameters of the cavity a 121, the cavity B122, the cavity C123 and the cavity D124 are sequentially reduced, the first cavity 11 is communicated with the cavity C123, and the third cavity 13 is communicated with the cavity D124.

The valve seat body 3 and the valve port seat 2 are detachably connected from top to bottom, the valve seat body 3 and the valve port seat 2 are arranged in the second cavity 12, and the first cavity 11 is communicated with the valve port seat 2 and the third cavity 13 to form a flow channel. Specifically, the valve seat body 3 is screwed to the valve port seat 2. The lower part of the valve seat body 3 is embedded into the upper part of the second cavity 12 and is detachably connected with the second cavity 12, the valve seat body 3 is connected with the valve body 1 through threads, and the upper part of the valve seat body 3 and the upper part of the second cavity 12 are sealed through an upper sealing ring 14; the lower part of the valve port seat 2 is embedded into the middle part of the second cavity 12 in an attaching manner, and the lower part of the valve port seat 2 and the inner wall of the second cavity 12 are sealed through a lower sealing ring 15. Furthermore, the valve seat body 3 comprises a hollow main seat body 31 and a connecting part 32 formed by the annular outer wall of the main seat body 31 in a protruding mode, the main seat body 31 is detachably connected with the C cavity 123, the connecting part 32 is embedded into the a cavity 121 in a fitting mode, and the upper sealing ring 14 is embedded into the B cavity 122 to form the sealing between the connecting part 32 and the valve body 1. The valve port seat 2 comprises a vertical cavity 21 and a transverse cavity 23 which are vertically communicated, the inner cavity of the valve seat body 3 is of a stepped hole structure with a large upper part and a small lower part, the upper part of the valve port seat 2 extends into the inner cavity of the valve seat body 3 and is in threaded connection with the valve seat body 3, the first cavity 11 is communicated with the transverse cavity 23, and the lower sealing ring 15 is embedded in the lower part of the valve port seat 2 to form sealing of the valve port seat 2 and the valve body 1.

The nut seat 4 extends into the valve seat body 3 and is fixedly connected with the valve seat body 3. Furthermore, the section of the nut seat 4 is in an inverted T shape, the lower part of the nut seat 4 extends into the inner cavity of the upper part of the valve seat body 3, the nut seat 4 is in interference fit connection with the valve seat body 3 or is fixedly connected through a fastener, and the nut seat 4 can be abutted to the stepped surface of the inner cavity of the valve seat body 3 to play a role in limiting the lower part of the valve seat body 3.

The rotor assembly 6 is in threaded connection with the outer wall of the nut seat 4 and can lift along the nut seat 4, the valve needle 5 movably penetrates through the rotor assembly 6 and the nut seat 4 and then extends into the valve port seat 2, and the rotor assembly 6 drives the valve needle 5 to lift to close or communicate the flow channel. The valve port seat 2 comprises a valve port 22, the vertical cavity 21 is vertically communicated with the valve port 22, and fluid flows in from the first cavity 11 and flows out after sequentially passing through the transverse cavity 23, the vertical cavity 22, the valve port 22, the lower part of the second cavity 12 and the third cavity 13. The rotor assembly 6 descends to drive the valve needle 5 to descend to block the valve port 22, so that the flow passage is closed, and the rotor assembly 6 ascends to drive the valve needle 5 to ascend to communicate with the flow passage. The valve port 22 comprises an inverted frustum-shaped upper opening part 221, a cylindrical middle opening part 222 and a frustum-shaped lower opening part 223 which are communicated up and down, the valve needle 5 comprises a conical needle head part 53 with a large upper part and a small lower part, the needle head part 53 is matched with and seals the upper opening part 221 and extends into the middle opening part 222 and the lower opening part 223, the size of a channel is changed by adjusting the distance between the outer wall of the needle head part 53 and the wall of the valve port 22, and the flow rate is further controlled.

The aperture of oral area 222 usually has 1.65mm in the valve port 22, 1.4mm, 1.2mm multiple specification, compare with conventional integral type disk seat part, the utility model discloses the split type of valve port seat 2 and disk seat body 3 is connected and is constituted the disk seat part, only need to change the valve port seat 2 and just can assemble the electronic expansion valve who satisfies different bore demands, and need not wholly prepare the disk seat part, be favorable to the production preparation of other specification products, reduce the inventory cost of different specification products, and can simplify disk seat part mould structure, make the manufacturing of valve port seat 2 and disk seat body 3 become simple, effectively reduce the production degree of difficulty and cost.

The valve needle 5 is attached to and penetrates through the guide sleeve 8 and can lift along the guide sleeve 8. The vertical cavity 21 is of a stepped hole structure with a large upper part and a small lower part, the guide sleeve 8 is connected to the stepped end face of the vertical cavity 21 in a pressing mode, the guide sleeve 8 can be in interference fit with the inner cavity of the valve port seat 2 and can also be connected through threads or fasteners, the guide sleeve 8 plays a role in guiding the lifting of the valve needle 5, the valve needle 5 is prevented from deviating, and the needle head 53 of the valve needle 5 is ensured to be stably matched with the valve port 22. The guide sleeve 8 can also seal the upper end of the valve port seat 2 to prevent liquid from overflowing upwards.

The rotor assembly 6 comprises a hollow rotor insert 61 matched and screwed with the nut seat 4, and the valve needle 5 penetrates through the inner cavity of the nut seat 4 after penetrating through the top of the rotor insert 61. The rotor assembly 6 further comprises a rotor 62 fixedly sleeved on the rotor insert 61, the longitudinal section of the rotor insert 61 is in an inverted U shape, the longitudinal section of the rotor 62 is in an H shape, the rotor insert 61 vertically penetrates through the horizontal middle part of the rotor 62 and is fixedly connected with the horizontal middle part, and the rotor insert 61 and the rotor 62 can be of an integrally formed structure or a structure fixed by welding or a fastener. The rotor assembly 6 is driven by a coil assembly (not shown) as is known in the art and will not be described in detail.

The utility model discloses still include the casing 9 of cladding in 6 outer lanes of rotor subassembly, casing 9 lower extreme and 3 upper ends of the valve seat body are connected. The longitudinal section of the shell 9 is in an inverted U shape, and the lower end of the shell 9 is sleeved and fixed to the upper end of the valve seat body 3 and can be further fixedly connected through a fastener.

The upper part of the valve needle 5 is sleeved with a valve needle sleeve 55, and the valve needle sleeve 55 is fixedly sleeved on the upper part of the valve needle 51 through riveting. The sunken concave ring portion 52 that forms of needle 5 upper portion annular outer wall, in needle cover 55 can imbed the concave ring portion 52 after the riveting, form firm connection, compare with the direct laser welding mode of needle cover 55 and needle 5 among the prior art, can replace costly laser welding equipment with the cylinder riveting equipment or the hydraulic press of the easy operation of low price, reduction in production cost by a wide margin.

The valve needle sleeve 55 can be in up-and-down pressure connection with the rotor insert 61, an elastic part 54 is sleeved between the valve needle 5 and the nut seat 4, and the upper end of the elastic part 54 is abutted to the upper top wall of the inner cavity of the rotor insert 61. The valve needle 5 is movably hung on the rotor insert 61 through the valve needle sleeve 55 and the elastic part 54. The elastic member 54 is a spring.

The top of the rotor insert 61 is provided with a through hole 611 for the valve needle 5 to pass through, and the outer diameter of the valve needle sleeve 55 is larger than the inner diameter of the through hole 611, so that the valve needle sleeve 55 and the upper surface of the rotor insert 61 can abut against each other. When the rotor assembly 6 rotates and rises, the rotor insert 61 abuts against the valve needle sleeve 55 to drive the valve needle 5 to move upwards, so that the needle head 53 of the valve needle 5 no longer blocks the valve port 22.

The valve needle 5 comprises a convex ring part 51, the lower end of the elastic part 54 is abutted to the convex ring part 51, a gasket 56 sleeved outside the valve needle 5 is arranged in the inner cavity of the rotor insert 61, and the gasket 56 is pressed between the upper end of the elastic part 54 and the upper top wall of the inner cavity of the rotor insert 61. The top inner top wall of the rotor insert 61 and the upper end of the nut seat 4 are spaced by a certain distance, the rotor insert 61 is arranged between the top inner top wall of the rotor insert 61 and the upper end of the nut seat 4 and can move between the top inner top wall of the rotor insert 61 and the upper end of the nut seat 4, when the rotor assembly 6 rotates and descends, the rotor insert 61 abuts against the gasket 56 and is in pressure contact with the elastic part 54, the valve needle 5 is driven to descend, when the needle head part 53 of the valve needle 5 abuts against the valve port 22, the rotor insert 61 descends and continues to be in pressure contact with the gasket 56 and contract the elastic part 54, and the valve needle 5 can stably block the valve port 22.

The electronic expansion valve further comprises a backstop rod 7, and the backstop rod 7 is welded on the rotor insert 61 through energy storage welding. Specifically, a plurality of salient points 71 are distributed on the lower surface of the retaining rod 7, and the salient points 71 are welded to the upper surface of the rotor insert 61 through energy storage welding. Stopping pole 7 is L shape, and bump 71 sets up and stopping pole 7 horizontal part lower surface, compares with conventional laser welding, adopts the loop point energy storage to weld and can not only guarantee the welded uniformity, guarantees product quality stability, more can reduction in production cost by a wide margin.

The utility model discloses electronic expansion valve is still including adorning at the stopper 91 at 9 inner chamber tops admittedly, and when 6 rotatory rises of rotor subassembly, stopping pole 7 rises along with the rotor subassembly 6 rotation, and rotor subassembly 6 rises to a take the altitude, and stopper 91 continues the action through restriction stopping pole 7 to restriction needle 5 continues the upward movement, and the structural design that stopper 91 restriction stopping pole 7 belongs to prior art, does not do further elaboration here.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. The utility model provides an electronic expansion valve, includes valve body (1), valve port seat (2), valve seat body (3), nut seat (4), needle (5) and rotor subassembly (6), its characterized in that: the valve body (1) comprises a first cavity (11) and a third cavity (13) which are distributed in a high-high mode and a low-low mode, and a second cavity (12) which is communicated with the first cavity (11) and the third cavity (13), the valve seat body (3) and the valve port seat (2) are detachably connected and arranged from top to bottom, the valve seat body (3) and the valve port seat (2) are assembled into the second cavity (12) together, the first cavity (11) is communicated with the valve port seat (2) and the third cavity (13) to form a flow channel, the valve seat body (3) is stretched into the nut seat (4) and is fixedly connected with the valve seat body (3), the rotor assembly (6) is in threaded connection with the outer wall of the nut seat (4) and can lift along the nut seat (4), the valve needle (5) movably penetrates through the rotor assembly (6) and the nut seat (4) to stretch into the valve port seat (2), and the rotor assembly (6) drives the valve needle (5) to lift to close or communicate the flow channel.

2. An electronic expansion valve according to claim 1, wherein: the valve seat body (3) is connected with the valve port seat (2) through threads.

3. An electronic expansion valve according to claim 1, wherein: rotor subassembly (6) include with hollow rotor mold insert (61) of nut seat (4) cooperation spiro union, needle (5) pass nut seat (4) inner chamber behind rotor mold insert (61) top, needle (5) upper portion cover is equipped with valve needle cover (55), valve needle cover (55) can with rotor mold insert (61) crimping from top to bottom, the cover is equipped with elastic component (54) between needle (5) and nut seat (4), roof on elastic component (54) upper end butt to rotor mold insert (61) inner chamber.

4. An electronic expansion valve according to claim 3, wherein: the valve needle sleeve (55) is fixedly sleeved on the upper part of the valve needle (5) through riveting.

5. An electronic expansion valve according to claim 3, wherein: valve needle (5) are including protruding ring portion (51), elastic component (54) lower extreme butt to protruding ring portion (51), rotor mold insert (61) inner chamber is equipped with and establishes gasket (56) outside valve needle (5), and gasket (56) crimping is between elastic component (54) upper end and rotor mold insert (61) inner chamber upper ceiling.

6. An electronic expansion valve according to claim 3, wherein: the electronic expansion valve further comprises a backstop rod (7), and the backstop rod (7) is welded on the rotor insert (61) through energy storage welding.

7. An electronic expansion valve according to claim 6, wherein: a plurality of salient points (71) are distributed on the lower surface of the retaining rod (7), and the salient points (71) are welded to the upper surface of the rotor insert (61) through energy storage welding.

8. An electronic expansion valve according to claim 1, wherein: the valve needle is characterized in that a guide sleeve (8) is fixedly embedded in the upper portion of the valve port seat (2), and the valve needle (5) is attached to penetrate through the guide sleeve (8) and can lift along the guide sleeve (8).

9. An electronic expansion valve according to claim 1, wherein: the lower part of the valve seat body (3) is embedded into the upper part of the second cavity (12) and is detachably connected with the second cavity (12), and the upper part of the valve seat body (3) is sealed with the upper part of the second cavity (12) through an upper sealing ring (14); the lower part of the valve port seat (2) is embedded into the middle part of the second cavity (12) in an attaching manner, and the lower part of the valve port seat (2) and the inner wall of the second cavity (12) are sealed through a lower sealing ring (15).

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