Test system for connectors matching stop valves and air conditioners

Abstract

The present invention provides a joint matched with a stop valve and a test system for air conditioners, and relates to the technical field of air conditioners, in order to solve the technical problem that the joint connected with the stop valve in the prior art has a relatively fast damage of the sealing ring in the air conditioner test. The joint includes a sealing ring, wherein a matching hole is provided on the sealing ring, the stop valve can be inserted into the matching hole, and the stop valve presses the inner side wall of the matching hole along the radial direction of the sealing ring to achieve the sealing match between the two. The present invention is used to increase the service life of the joint sealing ring matched with the stop valve.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioners, and in particular to a connector matched with a stop valve and a test system for air conditioners. Background Art

[0002] In current air-conditioning tests, the joints used to connect to the stop valves generally have high leakage rates and fast damage to the sealing rings, with a lifespan of only about 20 days. The debris of the damaged sealing rings can easily enter the air-conditioning system and affect the quality of the air-conditioning.

[0003] See attached picture Figure 1 and Figure 2 , which illustrates the structure of the existing joint, mainly including components such as the valve stem head, a nut and a sealing ring. The nut is screwed into the stop valve thread, and the sealing ring is sealed with the chamfered structure (conical surface) of the stop valve. Since the screw-in depth of the stop valve is uncontrollable, when the screw-in depth of the stop valve is relatively deep, the allowable value of the compression ratio of the sealing ring will be exceeded, resulting in accelerated damage to the sealing ring. Summary of the invention

[0004] The purpose of the present invention is to provide a connector for use with a stop valve and an air conditioner test system, so as to solve the technical problem that the seal ring of the connector for use with the stop valve is damaged relatively quickly during air conditioner testing in the prior art. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a joint for cooperating with a stop valve, comprising a sealing ring, wherein the sealing ring is provided with a matching hole, the stop valve can be inserted into the matching hole, and the stop valve presses the inner side wall of the matching hole along the radial direction of the sealing ring to achieve sealing cooperation between the two.

[0007] Furthermore, the joint also includes a valve stem head, the sealing ring is arranged on the valve stem head, and one end of the stop valve extending into the matching hole can abut against the valve stem head.

[0008] Furthermore, an assembly groove is provided on the end surface of the valve stem head, the sealing ring is located in the assembly groove, and one end of the stop valve extending into the matching hole can abut against the bottom surface of the assembly groove.

[0009] Furthermore, an internal channel connected to the assembly groove is arranged on the valve stem head, and a diameter of the internal channel at one end close to the assembly groove is smaller than a diameter of the matching hole.

[0010] Furthermore, a positioning protrusion is provided on the circumferential outer surface of the sealing ring close to the bottom surface of the assembly groove, an annular limiting groove is provided on the circumferential groove wall of the assembly groove, and the positioning protrusion is located in the annular limiting groove.

[0011] Furthermore, a chamfered structure is provided on the inner ring of the sealing ring on one side close to the end of the valve stem head; when the stop valve is inserted into the sealing ring and one end thereof abuts against the valve stem head, the chamfered structure on the sealing ring does not contact the chamfered structure on the stop valve.

[0012] Furthermore, a chamfered structure is provided on the inner ring of the sealing ring on one side close to the end of the valve stem head; when the stop valve is inserted into the sealing ring and one end thereof abuts against the valve stem head, the chamfered structure on the sealing ring contacts the chamfered structure on the stop valve.

[0013] Furthermore, the joint also includes a valve stem head and a nut, the sealing ring is arranged on the valve stem head, the nut is sleeved outside the valve stem head, the nut is fixedly connected to the valve stem head, and the stop valve can be screwed into the nut and inserted into the sealing ring.

[0014] Furthermore, one end of the valve stem head is pressed against the inner end face of the nut, a retaining ring is installed on the inner side face of the nut, and a fixing block between the nut and the valve stem head is limited between the retaining ring and the end face of the stepped portion of the valve stem head.

[0015] A test system for an air conditioner comprises the connector matched with the stop valve.

[0016] The present invention provides a joint that cooperates with a stop valve, including a sealing ring, on which a matching hole is arranged. When the stop valve is inserted into the matching hole, the stop valve squeezes the inner wall of the matching hole along the radial direction of the sealing ring. That is to say, when the diameter of the matching hole is reasonably set, the compression ratio of the stop valve tube body to the sealing ring will be limited to a reasonable range. Even when the stop valve is screwed in to a relatively deep depth, the stop valve will not exceed the allowable value of the compression ratio of the sealing ring when compressing the sealing ring, so as to ensure the optimal performance of the sealing ring and improve the service life of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1It is a structural schematic diagram of a joint that cooperates with a stop valve in the prior art;

[0019] Figure 2 It is a structural schematic diagram of the connection between the stop valve and the joint in the prior art;

[0020] Figure 3 It is a structural schematic diagram of a joint matched with a stop valve provided in an embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the connection between the stop valve and the joint provided by an embodiment of the present invention;

[0022] Figure 5 yes Figure 4 A is a partial enlarged view of the

[0023] In the figure, 1, sealing ring; 11, matching hole; 12, positioning protrusion; 2, valve stem head; 21, internal channel; 22, annular limit groove; 3, nut; 4, retaining ring; 5, fixing block; 6, stop valve body. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 The present invention provides a joint for use with a stop valve, comprising a sealing ring 1, wherein the sealing ring 1 is provided with a matching hole 11, the stop valve can be inserted into the matching hole 11 and the stop valve presses the inner side wall of the matching hole 11 along the radial direction of the sealing ring 1 to achieve a sealed fit between the two. See the attached drawings Figure 1 , which shows the structure of the existing joint, see Figure 2 , which illustrates a schematic diagram of the structure of the existing joint matching with the stop valve body. It can be seen from the figure that the sealing ring is sealed with the chamfered structure (conical surface) of the stop valve. When the stop valve is screwed in to a relatively deep depth, the stop valve will compress the sealing ring and the sealing ring compression ratio will exceed the allowable value, resulting in accelerated damage to the sealing ring; and the joint provided by the present invention that matches the stop valve can be seen in Figure 3-Figure 5 When the stop valve is inserted into the matching hole 11, the stop valve squeezes the inner wall of the matching hole 11 along the radial direction of the sealing ring 1. That is to say, when the diameter of the matching hole 11 is set reasonably, the compression ratio of the stop valve body 6 to the sealing ring 1 will be limited to a reasonable range. Even when the stop valve is screwed in to a relatively deep depth, the stop valve will not exceed the allowable value of the sealing ring compression ratio when compressing the sealing ring.

[0026] See also Figure 4 and Figure 5 As can be seen from the figure, the matching hole 11 is a cylindrical hole, and the right section of the chamfered structure of the end face of the stop valve body 6 matches the matching hole 11. By adjusting the structure of the joint, the position of the stop valve body 6 and the sealing ring is changed, and the sealing method is changed; and because the matching hole 11 is a cylindrical hole, the depth of the stop valve screwed into the sealing ring 1 will not affect the compression ratio of the sealing ring. This ensures the best performance of the sealing ring and increases the service life of the sealing ring.

[0027] As an optional embodiment, the joint also includes a valve stem head 2, a sealing ring 1 is arranged on the valve stem head 2, and the end of the stop valve extending into the matching hole 11 can abut against the valve stem head 2. Since the valve stem head 2 is a rigid part, when the stop valve body 6 contacts the valve stem head 2, the stop valve body 6 cannot be screwed in further. The specific structure can be as follows: an assembly groove is arranged on the end surface of the valve stem head 2, the sealing ring 1 is located in the assembly groove and the end of the stop valve extending into the matching hole 11 can abut against the groove bottom surface of the assembly groove; an internal channel 21 connected to the assembly groove is arranged on the valve stem head 2, and the diameter of the internal channel 21 close to the end of the assembly groove is smaller than the diameter of the matching hole 11. See Figure 3 , which shows that the diameter of the inner passage 21 near the assembly groove is smaller than the diameter of the matching hole 11, see Figure 4 , illustrating that the stop valve body 6 abuts against the valve stem head 2.

[0028] As an alternative embodiment, see Figure 3-Figure 5 A positioning protrusion 12 is provided on the circumferential outer surface of the sealing ring 1 close to the bottom surface of the assembly groove, and an annular limiting groove 22 is provided on the circumferential groove wall of the assembly groove, and the positioning protrusion 12 is located in the annular limiting groove 22. When the sealing ring 1 is installed in the assembly groove on the valve stem head 1, the positioning protrusion 12 on the sealing ring 1 is located in the annular limiting groove 22 on the assembly groove, and the annular limiting groove 22 is used to avoid the positioning protrusion 12 on the sealing ring 1, and the sealing ring 1 contacts the bottom surface of the assembly groove to achieve the positioning assembly of the sealing ring 1.

[0029] As an optional embodiment, the inner ring of the sealing ring 1 is provided with a chamfered structure on one side close to the end of the valve stem head 2; when the stop valve is inserted into the sealing ring 1 and one end thereof abuts against the valve stem head 2, the chamfered structure on the sealing ring 1 does not contact the chamfered structure on the stop valve. Figure 4 and Figure 5 There is a chamfered structure on the right side of the section where the stop valve body 6 and the sealing ring 1 are sealed. When the stop valve body 6 extends into contact with the valve stem head 2, the corresponding chamfered structure on the stop valve body 6 does not contact the chamfered structure on the sealing ring 1, that is, there is a gap between the two chamfered structures.

[0030] Alternatively, when the stop valve is inserted into the sealing ring 1 and the stop valve body 6 contacts the valve stem head 2 , the chamfered structure on the stop valve contacts the chamfered structure on the sealing ring 1 , thereby further achieving sealing.

[0031] As an alternative embodiment, see Figure 3-Figure 4 , the joint also includes a valve stem head 2 and a nut 3, a sealing ring 1 is arranged on the valve stem head 2, the nut 3 is sleeved outside the valve stem head 2, the nut 3 is fixedly connected to the valve stem head 2, and the stop valve can be screwed into the nut 3 and the sealing ring 1 is inserted. The specific fixing method of the valve stem head 2 and the nut 3 can be as follows: one end of the valve stem head 2 is pressed against the inner end face of the nut 3, a retaining ring 4 is installed on the inner side face of the nut 3, and the fixing block 5 between the nut 3 and the valve stem head 2 is limited between the retaining ring 4 and the end face of the stepped part of the valve stem head 2, so that the valve stem head 2 is tightly clamped inside the nut 3. In addition, a thread is arranged on the left side of the valve stem head 2, which is convenient for docking with other joints or air conditioner outdoor units. For the nut 3, the outer peripheral surface of the nut 3 is a regular hexagon, and can also be set to other regular polygons for convenient tightening and use.

[0032] Embodiment 1:

[0033] A joint for use with a stop valve comprises a sealing ring 1, wherein the sealing ring 1 is provided with a matching hole 11, the stop valve can be inserted into the matching hole 11 and the stop valve presses the inner side wall of the matching hole 11 along the radial direction of the sealing ring 1 to achieve sealing cooperation between the two;

[0034] An assembly groove is provided on the end surface of the valve stem head 2, and the sealing ring 1 is located in the assembly groove. An internal channel 21 connected to the assembly groove is provided on the valve stem head 2. The diameter of the internal channel 21 close to the assembly groove is smaller than the diameter of the matching hole 11. The end of the stop valve extending into the matching hole 11 can abut on the valve stem head 2.

[0035] The inner ring of the sealing ring 1 is provided with a chamfered structure on one side close to the end of the valve stem head 2. When the stop valve is inserted into the sealing ring 1 and one end thereof abuts against the valve stem head 2, the chamfered structure on the sealing ring 1 does not contact the chamfered structure on the stop valve.

[0036] Embodiment 2:

[0037] A test system for air conditioners comprises the connector described in Example 1 and matched with the stop valve.

[0038] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A connector for use with a stop valve, characterized in that: It comprises a sealing ring (1), wherein: The sealing ring (1) is provided with a matching hole (11), the matching hole (11) being a cylindrical hole, the right section of the chamfered structure of the end surface of the stop valve tube body (6) matching with the matching hole (11), the stop valve tube body (6) can be inserted into the matching hole (11), and the stop valve tube body (6) presses the inner side wall of the matching hole (11) along the radial direction of the sealing ring (1) to achieve sealing matching between the two; The joint further comprises a valve stem head (2), the sealing ring (1) being arranged on the valve stem head (2); the inner ring of the sealing ring (1) is provided with a chamfered structure on one side close to the end of the valve stem head (2); When the stop valve tube body (6) is inserted into one end of the sealing ring (1) and abuts against the valve stem head (2), the chamfered structure on the sealing ring (1) does not contact the chamfered structure on the stop valve tube body (6), or the chamfered structure on the sealing ring (1) contacts the chamfered structure on the stop valve tube body (6); One end of the stop valve tube body (6) extending into the matching hole (11) can abut against the valve stem head (2); An assembly groove is provided on the end surface of the valve stem head (2), the sealing ring (1) is located in the assembly groove, and the end of the stop valve tube body (6) extending into the matching hole (11) can abut against the bottom surface of the assembly groove; The valve stem head (2) is provided with an internal channel (21) connected to the assembly groove, and the diameter of the internal channel (21) at one end close to the assembly groove is smaller than the diameter of the matching hole (11).

2. The connector for use with a stop valve according to claim 1, characterized in that: A positioning protrusion (12) is provided on the circumferential outer surface of the sealing ring (1) close to the bottom surface of the assembly groove, and an annular limiting groove (22) is provided on the circumferential groove wall of the assembly groove, and the positioning protrusion (12) is located in the annular limiting groove (22).

3. A connector for use with a stop valve according to any one of claims 1 to 2, characterized in that: The joint further comprises a valve stem head (2) and a nut (3); the sealing ring (1) is arranged on the valve stem head (2); the nut (3) is sleeved outside the valve stem head (2); the nut (3) is fixedly connected to the valve stem head (2); and the stop valve can be screwed into the nut (3) and inserted into the sealing ring (1).

4. The connector for use with a stop valve according to claim 3, characterized in that: One end of the valve stem head (2) is pressed against the inner end surface of the nut (3), a retaining ring (4) is installed on the inner side surface of the nut (3), and a fixing block (5) between the nut (3) and the valve stem head (2) is limited between the retaining ring (4) and the end surface of the stepped portion of the valve stem head (2).

5. A test system for air conditioner, characterized in that: The invention comprises a connector matched with a stop valve as described in any one of claims 1 to 4.

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