Valve body structure for refrigerant recycling machine

By setting a limiting device on the valve seat of the refrigerant recovery machine, limiting the valve core and return spring are guided, the problems of valve core skew and return spring torsion are solved, and the stability and reliability of the valve body are improved.

CN222526990UActive Publication Date: 2025-02-25JINHUA WEIKE INDUSTRIAL & TRADING CO LTD
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Patent Information

Application Number
CN202421340521.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-13
Publication Date
2025-02-25
Estimated Expiration
2034-06-13

AI Technical Summary

Technical Problem

The valve core of the refrigerant recycling machine is prone to skew during the high frequency rapid expansion and contraction process, resulting in the valve core breaking and the return spring breaking, which in turn affects the normal operation and reliability of the valve body.

Method used

The limiting device is provided on the valve seat, and the valve core is guided and limited through the limiting device and the return spring axially through the limiting device and the inner wall of the air intake chamber to ensure that the valve core and return spring are in motion Maintain concentricity during the process.

Benefits of technology

Effectively prevent the valve core from skewing and the return spring torsion, extend the service life of the valve core and return spring, and improve the stability and reliability of the valve body.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a valve body structure for a refrigerant recycling machine, which comprises a valve control block, an air inlet cavity is arranged in the valve control block, and a valve core capable of stretching relative to the air inlet cavity is arranged in the air inlet cavity; a valve seat fixedly connected with the air inlet cavity is arranged at the opening end of the air inlet cavity, and the tail end of the valve element penetrates out of the valve seat; a limiting device integrally formed with the valve seat is arranged on the valve seat, and the outer layer of the valve element is sleeved with a reset spring. One end of the reset spring abuts against the tail end of the valve element, and the other end of the reset spring abuts against the limiting device. The limiting device is installed on the outer layer of the valve element in a sleeving mode, and the valve element and the air inlet cavity are coaxially arranged. According to the utility model, the valve core is guided and limited through the limiting device; the reset spring is limited in the radial direction through the valve element, and the reset spring is limited in the axial direction through the limiting device and the inner wall of the air inlet cavity. Therefore, the reset spring and the valve element have better concentricity, the valve element always moves in the direction perpendicular to the piston, and the moving process is stable and reliable.
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Description

Technical Field

[0001] The utility model belongs to the technical field of recovery machine accessories, and in particular relates to a valve body structure used for a refrigerant recovery machine. Background Art

[0002] The cylinder head of the compressor of the refrigerant recovery machine is provided with an air inlet and an air outlet. The air inlet is provided with an air inlet valve, and the air outlet is provided with an air outlet valve. During operation, when the cylinder piston moves, the air inlet valve opens and the air outlet valve closes, and the refrigerant is sucked into the cylinder body from the air inlet; a valve seat is provided at the open end of the air inlet, and the end of the valve core passes through the valve seat and is arranged adjacent to the cylinder piston; since there is a conical hole on the valve seat, the valve core is often skewed relative to the air inlet when it is extended and retracted; since the piston is extended and retracted rapidly at a high frequency for a long time, the piston will break the skewed valve core; at the same time, the outer sleeve of the valve core is installed with a spring, and the skewed valve core is easy to be twisted by the spring; after the valve core is extended and retracted for a long time, the spring is easy to break. Eventually, the valve body cannot work normally, and the valve body can only be replaced as a whole, and the reliability is poor. Therefore, it is necessary to design a valve body structure for a refrigerant recovery machine to overcome the above difficulties. Summary of the invention

[0003] In view of the problems existing in the prior art, the utility model designs a valve body structure for a refrigerant recovery machine. The utility model arranges a limit device on the valve seat, and guides and limits the valve core through the limit device; radially limits the return spring through the valve core, and axially limits the return spring through the limit device and the inner wall of the air intake cavity; thereby, the return spring and the valve core have better concentricity, the valve core always moves in the direction perpendicular to the piston, and the movement process is stable and reliable.

[0004] The inventive object of the utility model is achieved through the following technical solutions: a valve body structure for a refrigerant recovery machine, comprising a valve control block, an air intake cavity is provided in the valve control block, a valve core which can be retracted and contracted relative to the air intake cavity is provided in the air intake cavity; a valve seat is provided at the open end of the air intake cavity and the end of the valve core passes through the valve seat; a limiting device is provided on the valve seat and is integrally formed therewith, and a return spring is installed on the outer layer of the valve core; one end of the return spring abuts against the end of the valve core, and the other end abuts against the limiting device; the limiting device is installed on the outer layer of the valve core, and the valve core is coaxially arranged with the air intake cavity.

[0005] Preferably, the limiting device includes a limiting sleeve arranged on the upper end surface of the valve seat, and the limiting sleeve is integrally formed with the valve seat; a plurality of limiting protrusions for limiting are arranged on the top of the limiting sleeve, and each of the limiting protrusions is distributed in a circular array along the inner wall of the limiting sleeve; a plurality of evenly distributed U-shaped grooves are arranged on the side wall of the limiting sleeve, and the U-shaped grooves and the limiting protrusions are alternately distributed in sequence.

[0006] The limiting sleeve and the valve seat are integrally formed, so that the limiting sleeve structure is more solid and the limiting effect is better. The limiting protrusion is arranged around the valve core to guide and limit the valve core, and the valve core can also expand and contract relative to the limiting sleeve. Since the gap between the limiting protrusion and the valve core is small, a U-shaped groove is provided here, so that the refrigerant medium can flow out of the U-shaped groove, thereby facilitating the flow of the refrigerant medium and facilitating further recovery.

[0007] Preferably, the limiting protrusion is arranged toward the valve core, the end face contour of the limiting protrusion matches the outer contour of the valve core, and the limiting protrusion is arranged coaxially with the valve core. In this way, the valve core and the limiting protrusion always maintain the coaxial arrangement, and the limiting effect of the limiting protrusion is better.

[0008] Preferably, the stopper and the valve seat are integrally formed and both are metal parts, so that the valve seat and the stopper have higher structural strength and longer service life.

[0009] Preferably, the limiting device and the valve seat are made of aluminum alloy.

[0010] Preferably, the limiting sleeve is a hollow column, and the outer contour of the limiting sleeve matches the outer contour of the air inlet cavity; the outer wall of the limiting sleeve and the inner wall of the air inlet cavity are arranged in a close fit. The limiting sleeve extends into the air inlet cavity, which facilitates the positioning and installation of the valve seat; at the same time, it ensures that the limiting sleeve and the air inlet cavity have better concentricity; then the valve core in the limiting sleeve can always maintain a coaxial setting with the air inlet cavity, and the direction of the valve core when it is extended and retracted is always in the vertical direction and will not be skewed.

[0011] Preferably, a conical through hole is provided on the valve seat, a conical protrusion is provided at the bottom of the valve core, and the outer contour of the conical through hole and the outer contour of the conical protrusion match each other; the limiting device extends from the conical through hole to the inside of the air intake cavity; the limiting device includes a limiting sleeve, the conical through hole and the limiting sleeve are interconnected, and the conical through hole and the limiting sleeve are coaxially arranged. By providing a conical through hole, it is convenient to place the valve core, and the conical protrusion of the valve core moves relative to the conical through hole, so that the valve core will not be skewed when moving and will be limited by the conical through hole.

[0012] Preferably, an annular protrusion is provided on the top of the valve core, and a reset spring is installed on the outer sleeve of the valve core; one end of the reset spring abuts against the upper end surface of the limiting sleeve, and the other end of the reset spring abuts against the annular protrusion; the reset spring is a conical spring, and the outer diameter of the conical spring gradually increases from top to bottom. By providing the annular protrusion, it is convenient to limit the end of the reset spring; the bottom of the reset spring is provided on the limiting sleeve, an air intake cavity is provided on the outside of the reset spring, and a valve core is provided on the inside of the reset spring, so that the axial and radial directions of the reset spring are limited, the telescopic path of the reset spring is unique, and the reset spring is not easy to be skewed.

[0013] Preferably, a seal is provided between the opening end of the intake cavity and the valve seat to seal both, and an annular groove for installing the seal is provided on the upper end surface of the valve seat; the outer contour of the seal matches the outer contour of the annular groove.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model is provided with a limiting device integrally formed with the valve seat, the limiting device includes a limiting sleeve and a limiting protrusion, the limiting sleeve is installed in the air intake cavity, and the limiting protrusion and the valve core are arranged adjacent to each other; the valve core, the air intake cavity and the valve seat are all arranged coaxially, the valve core is always in a vertical state when it is extended and retracted, and the valve core will not be skewed relative to the cylinder piston. The outer layer of the valve core is provided with a plurality of evenly distributed limiting protrusions, each limiting protrusion cooperates with each other to limit and guide the valve core, and the valve core can also be extended and retracted up and down relative to the limiting sleeve. At the same time, a U-shaped groove is provided on the limiting sleeve to facilitate the circulation of the condensing medium. At the same time, the limiting sleeve and the top of the valve core synchronously limit the reset spring to ensure that the reset spring will not be skewed, and the process of retracting and retracting the reset spring is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 This is a three-dimensional diagram of the hidden valve control block of the utility model;

[0018] Figure 4 is a three-dimensional diagram of a valve seat;

[0019] Figure 5 A three-dimensional view of the valve seat from another perspective;

[0020] Figure 6 This is the internal structure diagram of the utility model.

[0021] Markings in the figure: 1. valve control block; 2. air intake cavity; 3. valve core; 4. valve seat; 5. limit device; 51. limit sleeve; 52. limit protrusion; 53. U-shaped groove; 6. return spring; 7. conical through hole; 8. conical protrusion; 9. annular protrusion; 10. sealing element; 11. annular groove. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0023] like Figures 1 to 6 As shown, the present embodiment discloses a valve body structure for a refrigerant recovery machine, comprising a valve control block 1, in which an air intake cavity 2 is provided, in which a valve core 3 which can be retracted and contracted relative to the air intake cavity 2 is provided; an opening end of the air intake cavity 2 is provided with a valve seat 4 fixedly connected thereto, and an end of the valve core 3 passes through the valve seat 4; a limiting device 5 integrally formed therewith is provided on the valve seat 4, and a return spring 6 is installed on the outer layer of the valve core 3; one end of the return spring 6 abuts against the end of the valve core 3, and the other end abuts against the limiting device 5; the limiting device 5 is sleeved and installed on the outer layer of the valve core 3, and the valve core 3 and the air intake cavity 2 are coaxially arranged.

[0024] The limiting device 5 includes a limiting sleeve 51 arranged on the upper end surface of the valve seat 4, and the limiting sleeve 51 is integrally formed with the valve seat 4; a plurality of limiting protrusions 52 for limiting are arranged on the top of the limiting sleeve 51, and each of the limiting protrusions 52 is arranged in an array along the circumference of the inner wall of the limiting sleeve 51; a plurality of evenly distributed U-shaped grooves 53 are arranged on the side wall of the limiting sleeve 51, and the U-shaped grooves 53 and the limiting protrusions 52 are arranged alternately in sequence. The limiting protrusion 52 is arranged toward the valve core 3, and the end face profile of the limiting protrusion 52 matches the outer profile of the valve core 3, and the limiting protrusion 52 is arranged coaxially with the valve core 3. The limiting device 5 and the valve seat 4 are integrally formed, and both are metal parts. The limiting device 5 and the valve seat 4 are made of aluminum alloy. The limiting sleeve 51 is a hollow columnar body, and the outer contour of the limiting sleeve 51 matches the outer contour of the air intake cavity 2 ; the outer wall of the limiting sleeve 51 and the inner wall of the air intake cavity 2 are fitted together.

[0025] The valve seat 4 is provided with a conical through hole 7, and the bottom of the valve core 3 is provided with a conical protrusion 8, and the outer contour of the conical through hole 7 matches the outer contour of the conical protrusion 8; the limiting device 5 extends from the conical through hole 7 to the inside of the air intake cavity 2; the limiting device 5 includes a limiting sleeve 51, the conical through hole 7 and the limiting sleeve 51 are interconnected, and the conical through hole 7 and the limiting sleeve 51 are coaxially arranged. The top of the valve core 3 is provided with an annular protrusion 9, and the outer sleeve of the valve core 3 is provided with a reset spring 6; one end of the reset spring 6 abuts against the upper end surface of the limiting sleeve 51, and the other end of the reset spring 6 abuts against the annular protrusion 9; the reset spring 6 is a conical spring, and the outer diameter of the conical spring gradually increases from top to bottom. A seal 10 is provided between the opening end of the intake cavity 2 and the valve seat 4 to seal both. The upper end surface of the valve seat 4 is provided with an annular groove 11 for installing the seal 10. The outer contour of the seal 10 matches the outer contour of the annular groove 11.

[0026] The specific operation process of this embodiment is as follows: when the cylinder piston reciprocates, the condensed medium and gas will be extracted into the air inlet cavity 2; since the outer layer of the valve core 3 is limited by the limiting protrusion 52, the valve core 3 can only move along the axial direction of the limiting sleeve 51 when it moves; since the limiting sleeve 51 is installed in the air inlet cavity 2, the limiting sleeve 51 and the air inlet cavity 2 are coaxially arranged, so the valve core 3 is always coaxially arranged with the air inlet cavity 2 when it moves; the cylinder piston is vertically arranged to the valve seat 4, so that the valve core 3 will not be skewed relative to the cylinder piston, and the cylinder piston cannot interrupt the valve core 3. At the same time, the outer sleeve of the valve core 3 is equipped with a return spring 6, the bottom of the return spring 6 abuts on the limiting sleeve 51, and the top of the return spring 6 abuts on the annular protrusion 9; the inner side of the return spring 6 is limited by the valve core 3, and the outer side of the return spring 6 is limited by the air intake cavity 2; therefore, the return spring 6 is always in the same axial state as the valve core 3 when elastically deformed, and the return spring 6 will not twist or skew, and has a longer service life.

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A valve body structure for a refrigerant recovery machine, comprising a valve control block (1), wherein an air inlet cavity (2) is provided in the valve control block (1), characterized in that: The air inlet cavity (2) is provided with a valve core (3) that can be extended and retracted relative to the air inlet cavity (2); the open end of the air inlet cavity (2) is provided with a valve seat (4) fixedly connected thereto, and the end of the valve core (3) extends out from the valve seat (4); the valve seat (4) is provided with a limit device (5) integrally formed therewith, and the outer layer of the valve core (3) is sleeved with a return spring (6); one end of the return spring (6) abuts against the end of the valve core (3), and the other end abuts against the limit device (5); the limit device (5) is sleeved and installed on the outer layer of the valve core (3), and the valve core (3) and the air inlet cavity (2) are coaxially arranged.

2. The valve body structure for a refrigerant recovery machine according to claim 1, characterized in that: The limiting device (5) comprises a limiting sleeve (51) arranged on the upper end surface of the valve seat (4), wherein the limiting sleeve (51) and the valve seat (4) are integrally formed; a plurality of limiting protrusions (52) for limiting are arranged on the top of the limiting sleeve (51), wherein each of the limiting protrusions (52) is arranged in an array along the circumference of the inner wall of the limiting sleeve (51); a plurality of evenly distributed U-shaped grooves (53) are arranged on the side wall of the limiting sleeve (51), wherein the U-shaped grooves (53) and the limiting protrusions (52) are arranged alternately in sequence.

3. The valve body structure for a refrigerant recovery machine according to claim 2, characterized in that: The limiting protrusion (52) is arranged toward the valve core (3), the end surface profile of the limiting protrusion (52) matches the outer profile of the valve core (3), and the limiting protrusion (52) and the valve core (3) are arranged coaxially.

4. The valve body structure for a refrigerant recovery machine according to claim 2, characterized in that: The limiting device (5) and the valve seat (4) are integrally formed, and both are metal parts.

5. The valve body structure for a refrigerant recovery machine according to claim 4, characterized in that: The limiting device (5) and the valve seat (4) are made of aluminum alloy.

6. The valve body structure for a refrigerant recovery machine according to claim 2, characterized in that: The limiting shaft sleeve (51) is a hollow columnar body, and the outer contour of the limiting shaft sleeve (51) matches the outer contour of the air intake cavity (2); the outer wall of the limiting shaft sleeve (51) and the inner wall of the air intake cavity (2) are arranged in close contact.

7. The valve body structure for a refrigerant recovery machine according to claim 1, characterized in that: The valve seat (4) is provided with a conical through hole (7), the bottom of the valve core (3) is provided with a conical protrusion (8), and the outer contour of the conical through hole (7) and the outer contour of the conical protrusion (8) match each other; the limiting device (5) extends from the conical through hole (7) to the inside of the air intake cavity (2); the limiting device (5) comprises a limiting shaft sleeve (51), the conical through hole (7) and the limiting shaft sleeve (51) are connected to each other, and the conical through hole (7) and the limiting shaft sleeve (51) are coaxially arranged.

8. The valve body structure for a refrigerant recovery machine according to claim 7, characterized in that: An annular protrusion (9) is provided on the top of the valve core (3), and a return spring (6) is mounted on the outer sleeve of the valve core (3); one end of the return spring (6) abuts against the upper end surface of the limiting sleeve (51), and the other end of the return spring (6) abuts against the annular protrusion (9); the return spring (6) is a conical spring, and the outer diameter of the conical spring gradually increases from top to bottom.

9. The valve body structure for a refrigerant recovery machine according to claim 1, characterized in that: A sealing member (10) is provided between the open end of the air intake cavity (2) and the valve seat (4) for sealing the two, and an annular groove (11) is provided on the upper end surface of the valve seat (4) for mounting the sealing member (10); the outer contour of the sealing member (10) matches the outer contour of the annular groove (11).