Self-adjusting valve needle structure and throttling refrigerator

Abstract

The utility model provides a self-adjusting valve needle structure which comprises a moving rod and a valve needle body, one end of the valve needle body is connected with the moving rod through a spherical hinge structure, and the other end of the valve needle body is conical. According to the self-adjusting valve needle structure, the moving rod and the valve needle body are designed to be in spherical hinge connection, and when the valve needle body deviates from the axis to move and is stressed, the angle of the valve needle body can be rotated, so that the valve needle body is aligned in time, automatic centering of the valve needle is achieved, the assembling difficulty is lowered, and meanwhile the problem that a refrigerator is not self-adjusted is solved; in addition, a ball can be arranged at the end of the valve needle body, when the valve needle body makes contact with the wall of the throttling hole, sliding friction is changed into rolling friction through the ball, and deformation of the end of the valve needle body is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and in particular relates to a self-adjusting valve needle structure and a throttling refrigerator. Background Art

[0002] The self-adjusting throttling refrigerator uses a bellows or memory metal as a self-adjusting element. When the temperature of the self-adjusting gas or memory metal decreases, the self-adjusting component moves the valve needle toward the throttling hole, reducing the flow cross-section of the throttling hole, thereby adjusting the flow rate of the refrigerant coming out of the throttling hole. Therefore, the movement of the valve needle is the key to realizing the self-adjusting function of the self-adjusting throttling refrigerator.

[0003] At present, the flow regulating mechanism of the self-adjusting throttling refrigerator mainly includes a moving rod, a valve seat, a valve needle, a throttling hole, etc. The valve seat is fixed on the top of the moving rod, and the valve needle cooperates with the valve seat through a thread; when working, the valve needle is subjected to both the spiral force given by the valve seat and the reverse force given by the throttling gas. However, in the current assembly, it is impossible to ensure that the valve needle and the throttling hole are completely aligned in position. Therefore, during the movement, the valve needle and the throttling hole wall contact and interfere, and the valve needle is very easy to deform, which affects the smooth progress of the refrigerator's self-adjusting stroke and causes the refrigerator to be unable to self-adjust. Utility Model Content

[0004] The purpose of the utility model is to provide a self-adjusting valve needle structure, which can at least solve some of the defects existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A self-adjusting valve needle structure comprises a moving rod and a valve needle body, wherein one end of the valve needle body is connected to the moving rod through a ball joint structure, and the other end of the valve needle body is tapered.

[0007] Furthermore, a ball which can rotate freely at the end of the valve needle body is provided at one end away from the movement rod.

[0008] Furthermore, a limiting member for limiting the movable position of the ball is provided at one end of the valve needle body close to the ball.

[0009] Furthermore, the valve needle body includes valve needle body one and valve needle body two, the valve needle body one is a solid structure, the valve needle body two is a hollow structure, the valve needle body one and the valve needle body two are coaxially detachably connected, one end of the valve needle body is connected to the moving rod through a ball joint structure, and the end of the valve needle body two away from the valve needle body one is provided with a hole for placing the ball.

[0010] Furthermore, the diameter of the hole is not greater than the diameter of the ball.

[0011] Furthermore, the interior of the valve needle body 2 is filled with rubber blocks to limit the axial movement of the ball along the valve needle body 2.

[0012] Furthermore, the ball joint structure includes a ball sleeve and a ball head, wherein the ball sleeve is arranged on the movement rod, and the ball head is arranged at the end of the valve needle body, and the ball head is connected to the ball sleeve through a spinning process.

[0013] Furthermore, the ball head and the valve needle body are integrally formed.

[0014] In addition, the utility model also provides a throttling refrigerator, including a converging throttling tube and the above-mentioned self-adjusting valve needle structure; the converging throttling tube is provided with a throttling hole, the valve needle body is coaxially arranged with the throttling hole, and the end of the valve needle body away from the moving rod is close to the converging throttling tube.

[0015] Furthermore, the top of the throttling hole is conical.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The self-adjusting valve needle structure provided by the utility model is designed with a ball joint connection between the moving rod and the valve needle body. When the valve needle body is offset from the axis and subjected to force, the valve needle body can rotate, so that the valve needle body can return to the center in time, realizing automatic centering of the valve needle, reducing the difficulty of assembly and solving the problem of the refrigerator not self-adjusting.

[0018] (2) The self-adjusting valve needle structure provided by the utility model has a ball bearing disposed at the end of the valve needle body. When the valve needle body contacts the throttle hole wall, the ball bearing is used to convert sliding friction into rolling friction, thereby avoiding deformation of the end of the valve needle body.

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the self-adjusting valve needle of the utility model;

[0021] Figure 2 yes Figure 1 Enlarged view of part I in the middle.

[0022] Explanation of the reference numerals: 1. moving rod; 2. valve needle body 1; 3. valve needle body 2; 4. rubber block; 5. ball; 6. reflux throttling tube; 7. throttling hole; 8. ball head; 9. ball sleeve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a self-adjusting valve needle structure, including a motion rod 1 and a valve needle body, one end of the valve needle body is connected to the motion rod 1 through a ball joint structure, and the other end of the valve needle body is tapered. When the refrigerator is working, the motion rod 1 drives the valve needle body to move along its axial direction. When the motion trajectory of the valve needle body deviates from the axial direction and interferes with the wall surface of the throttle hole 7, since the valve needle body and the motion rod 1 are connected in the form of a ball joint structure, the ball joint structure can automatically adjust the direction of the valve needle body and return to the center position, thereby realizing automatic centering of the valve needle body; at the same time, the end of the valve needle body close to the throttle hole is designed as a tapered structure, which is convenient for connecting and adjusting the opening of the throttle hole.

[0028] In some optional embodiments, such as Figure 2As shown, a ball 5 which can rotate freely is arranged at one end of the valve needle body away from the moving rod 1. When the movement trajectory of the valve needle body deviates from the axial direction and interferes with the wall of the throttle hole 7, the ball 5 at the end of the valve needle body first contacts the wall of the throttle hole 7. The ball 5 is subjected to the reaction force of the wall of the throttle hole 7 and rolls under the combined force of its own gravity, thereby converting the sliding friction between the valve needle body and the wall of the throttle hole 7 into rolling friction, thereby avoiding the problem of valve needle deformation and improving the reliability of the refrigerator.

[0029] Preferably, a stopper for limiting the movable position of the ball 5 is provided at one end of the valve needle body close to the ball 5, so as to ensure that the ball 5 can only roll on the valve needle body but not move.

[0030] Since the size of the valve needle body is relatively small, in order to facilitate the assembly and positioning of the ball 5, in some embodiments, the valve needle body is optimized and designed to adopt a split structure; specifically, the valve needle body includes a valve needle body 1 2 and a valve needle body 2 3, wherein the valve needle body 1 2 is designed as a solid structure, and the valve needle body 2 3 is designed as a hollow structure, and the valve needle body 1 2 and the valve needle body 2 3 are coaxially detachably connected, and the end of the valve needle body 2 3 away from the valve needle body 1 2 is provided with a hole for placing the ball 5. During assembly, the ball 5 is first placed in the hollow valve needle body 2 3, and the ball 5 is limited to the hole of the valve needle body 2 3 and can be flexibly rotated 360 degrees, and then the valve needle body 1 2 and the valve needle body 2 3 are coaxially connected.

[0031] In order to prevent the ball 5 from moving along the axial direction of the valve needle body, the rubber block 4 is filled in the valve needle body 2 3 in an optimized design, and the rubber block 4 is used as a limiter to limit the axial movement of the ball 5. During assembly, after the ball 5 is placed in the valve needle body 2 3, the rubber block 4 is placed, and a certain gap is left between the rubber block 4 and the ball 5 to ensure that the ball 5 can rotate freely. Finally, the solid valve needle body 1 2 blocks the valve needle body 2 3 to ensure that the rubber block 4 will not move along the axial direction of the valve needle body 2 3, thereby limiting the axial movement of the ball 5.

[0032] Furthermore, the hole diameter is designed to be no larger than the diameter of the ball 5, preferably the hole diameter is slightly smaller than the diameter of the ball 5. The ball 5 is placed in the hole, thereby limiting the movement of the ball 5 in a direction perpendicular to the axis of the valve needle body, further ensuring that the ball 5 can only roll on the valve needle body but not move; at the same time, it can also ensure that when the movement trajectory of the valve needle body deviates from the axial direction and contacts the wall of the throttle hole, the ball 5 can first effectively roll and contact the wall of the throttle hole.

[0033] As a specific implementation, the ball joint structure includes a ball sleeve 9 and a ball head 8. The ball sleeve 9 is arranged on the movement rod 1. Specifically, the ball sleeve 9 can be a spherical groove formed on the movement rod 1; the ball head 8 is arranged at the end of the valve needle body away from the ball 5, and the center of the ball head 8 is located on the axis of the valve needle body. The ball head 8 is connected to the ball sleeve 9 through a spinning process; the valve needle body is suspended on the movement rod 1 through this ball joint structure. When the valve needle body is subjected to force, it can rotate relative to the movement rod 1, so that the valve needle body can return to the center in time, realizing the automatic centering of the valve needle. Among them, the ball head 8 and the valve needle body are preferably formed in an integral structure to ensure the accuracy of the automatic centering of the valve needle.

[0034] In addition, the present embodiment further provides a throttling refrigerator, including a converging throttling tube 6, and the above-mentioned self-adjusting valve needle structure; the converging throttling tube 6 is provided with a throttling hole 7, the valve needle body is coaxially arranged with the throttling hole 7, and one end of the ball 5 provided on the valve needle body is close to the converging throttling tube 6. When the refrigerator is working, the motion rod 1 drives the valve needle body to move toward the throttling hole 7 of the converging throttling tube 6 in the axial direction. If the valve needle body is offset and deviates from the axial direction and contacts the wall of the throttling hole 7, the wall of the throttling hole 7 will exert a force on the valve needle body. Since the valve needle body and the motion rod 1 are connected in the form of a ball joint structure, the valve needle body rotates at an angle when subjected to force and returns to the center in time, thereby realizing automatic centering of the valve needle, reducing the difficulty of assembly, and solving the problem of the non-self-adjustment of the refrigerator.

[0035] Preferably, the top of the throttle hole is designed to be a conical structure, which guides the centering of the valve needle body.

[0036] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A self-adjusting valve needle structure, characterized in that: It comprises a moving rod and a valve needle body, one end of the valve needle body is connected to the moving rod through a ball joint structure, and the other end of the valve needle body is tapered.

2. The self-adjusting valve needle structure according to claim 1, characterized in that: One end of the valve needle body away from the movement rod is provided with a ball which can rotate freely at the end thereof.

3. The self-adjusting valve needle structure according to claim 2, characterized in that: A limiting member for limiting the movable position of the ball is provided on one end of the valve needle body close to the ball.

4. The self-adjusting valve needle structure according to claim 2, characterized in that: The valve needle body includes valve needle body one and valve needle body two, the valve needle body one is a solid structure, the valve needle body two is a hollow structure, the valve needle body one and the valve needle body two are coaxially detachably connected, one end of the valve needle body is connected to the moving rod through a ball joint structure, and the end of the valve needle body two away from the valve needle body one is provided with a hole for placing the ball.

5. The self-adjusting valve needle structure according to claim 4, characterized in that: The diameter of the hole is not greater than the diameter of the ball.

6. The self-adjusting valve needle structure according to claim 4, characterized in that: The interior of the second valve needle body is filled with rubber blocks to limit the axial movement of the ball along the second valve needle body.

7. The self-adjusting valve needle structure according to claim 1, characterized in that: The ball joint structure comprises a ball sleeve and a ball head. The ball sleeve is arranged on the movement rod, and the ball head is arranged at the end of the valve needle body. The ball head is connected to the ball sleeve through a spinning process.

8. The self-adjusting valve needle structure according to claim 7, characterized in that: The ball head and the valve needle body are integrally formed.

9. A throttling refrigerator, characterized in that: It comprises a converging throttling tube and a self-adjusting valve needle structure as described in any one of claims 1 to 8; a throttling hole is provided on the converging throttling tube, the valve needle body is coaxially arranged with the throttling hole, and an end of the valve needle body away from the moving rod is close to the converging throttling tube.

10. The throttling refrigerator according to claim 9, characterized in that: The top of the throttling hole is conical.

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