A refrigerant-charged and vacuum-pumped quick connector capable of automatic ejection

Abstract

The utility model provides a kind of fast connector of refrigerant and vacuumizing that can be automatically popped, including connector main part, and connector main part is equipped with the plug-in cavity, valve core cavity and valve core hole;Multiple ball clamping holes for ball clamping are uniformly distributed on the side wall of plug-in cavity along circumference;Valve core is slidably arranged in valve core cavity, one end of valve core can open or close valve core hole, and the other end of valve core is equipped with elastic support structure;Connector main part is slidably arranged with movable sleeve, and reset member is arranged between movable sleeve and connector main part, which makes the inner wall of the head of movable sleeve can be pressed on the outside of ball so as to make the inside of ball extend into plug-in cavity, and air cavity is arranged between the inner wall of tail of movable sleeve and the outer wall of connector main part, air hole is arranged on the side wall of movable sleeve, and movable sleeve can be moved towards the tail of connector main part after air cavity is inflated through air hole so as to no longer press on the outside of ball.The utility model has few parts, connector main part penetrates head and tail, has few sealing positions, and is not easy to leak in use.

Description

Technical Field

[0001] This utility model relates to a quick-release connector for refrigerant charging and vacuuming that can automatically pop open. Background Technology

[0002] For example, Chinese Patent 201520515415.2 discloses an automatically opening female connector, including a connector body. The head of the connector body has a connecting structure, and the tail has a ball bearing, a movable sleeve, and a return spring. A first air chamber is formed between the inner wall of the movable sleeve's head and the outer wall of the connector body's head. The head of the movable sleeve has a first air hole connecting a gas pipeline to the first air chamber. A sliding sleeve is slidably installed inside the connector body. A second air chamber is formed between the outer wall of the sliding sleeve and the inner wall of the connector body. At least one second air hole is opened on the connector body connecting the first and second air chambers. A valve core structure is provided inside the sliding sleeve. It also includes sealing structures sealing both sides of the first and second air chambers. This type of female connector allows gas to be injected into the first and second air chambers through the first and second air holes, enabling the male and female connectors to connect and disconnect, making operation labor-saving and convenient. However, it has drawbacks: it has many parts and multiple sealing points, making it prone to leakage under high internal pressure during use. Summary of the Invention

[0003] The purpose of this invention is to provide a quick-release connector for refrigerant charging and vacuuming that can automatically open, which can solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a quick connector for refrigerant charging and vacuuming that can be automatically popped open, comprising a connector body, wherein a plug-in cavity is provided in the head of the connector body, a valve core cavity is provided in the tail of the connector body, the plug-in cavity and the valve core cavity are connected through a valve core hole, and a connecting structure is provided on the outside of the valve core cavity. The inner wall of the insertion cavity is provided with at least one first sealing ring, and the side wall of the insertion cavity located outside the first sealing ring is provided with a plurality of ball-holding holes evenly distributed circumferentially for the ball to be inserted. The ball can only be removed from the outside of the ball-holding hole. A valve core is slidably disposed in the valve core cavity. One end of the valve core can open or close the valve core hole, and the other end of the valve core is provided with an elastic support structure that allows the valve core to keep the valve core hole closed for a long time. The connector body is provided with a movable sleeve that slides outwards. A reset member is provided between the movable sleeve and the connector body. The reset member allows the inner wall of the head of the movable sleeve to press against the outer side of the ball, thereby allowing the inner side of the ball to extend into the insertion cavity. An air cavity is provided between the inner wall of the tail of the movable sleeve and the outer wall of the connector body. An air hole is provided on the side wall of the movable sleeve. After the air cavity is inflated through the air hole, the movable sleeve can move towards the tail of the connector body and no longer press against the outer side of the ball.

[0005] Preferably, the movable sleeve includes a first movable sleeve and a second movable sleeve, wherein the tail of the first movable sleeve and the head of the second movable sleeve are connected together by threads.

[0006] Preferably, the inner wall of the first movable sleeve is provided with a first shoulder, the connector body is provided with a second shoulder, and the reset element is a reset spring, which is sleeved outside the connector body, with one end of the reset spring supported on the first shoulder and the other end of the reset spring supported on the second shoulder.

[0007] Preferably, a retaining ring is fitted on the outer wall of the connector body, located outside the retaining bead hole, to prevent the first movable sleeve from moving out of the head of the connector body.

[0008] Preferably, a first protrusion is provided on the outer wall of the middle part of the connector body, and a second protrusion is provided on the inner wall of the tail end of the second movable sleeve. A second sealing ring is provided between the outer wall of the first protrusion and the inner wall of the second movable sleeve, and between the inner wall of the second protrusion and the outer wall of the connector body. A gap is formed between the outer wall of the connector body and the inner wall of the second movable sleeve between the two second sealing rings, forming an annular air cavity.

[0009] Preferably, the connection structure is an internal thread provided on the outer side of the inner wall of the valve core cavity.

[0010] Preferably, the valve core has a first conical surface at its head and a third sealing ring located inside the first conical surface. The first conical surface passes through the valve core hole and is placed in the insertion cavity. The third sealing ring seals the valve core hole on the side near the valve core cavity.

[0011] Preferably, the valve core hole has a second conical surface on the side near the valve core cavity that contacts the third sealing ring.

[0012] Preferably, the elastic support structure includes a support frame that is slidably fitted onto the tail of the valve core, and a support spring fitted onto the outside of the valve core and supported between the support frame and the head of the valve core, wherein the support frame is fixed in the valve core cavity.

[0013] Compared with the prior art, the advantages of this utility model are as follows: 1. This utility model only requires injecting gas into the air chamber through the air hole, thereby causing the movable sleeve to move towards the tail of the connector body and no longer press on the ball bearing. The ball bearing will not lock the external component located in the insertion cavity, realizing the separation of the connector body from the external component, which is labor-saving and convenient. 2. This utility model has fewer parts, the connector body runs through both ends, and there are fewer sealing positions, making it less prone to leakage during use. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] like Figure 1 As shown, this utility model provides a quick-release connector for refrigerant charging and vacuuming that can be automatically opened, including a connector body 1. The head of the connector body 1 is provided with a plug-in cavity 2, and the tail of the connector body 1 is provided with a valve core cavity 3. The plug-in cavity 2 and the valve core cavity 3 are connected through a valve core hole 4, and a connecting structure is provided on the outside of the valve core cavity 3. At least one first sealing ring 5 is provided on the inner wall of the insertion cavity 2. In this embodiment, there are two first sealing rings 5 ​​and they are spaced apart. The first sealing ring 5 is an O-ring. Multiple ball-holding holes 7 for the ball 6 to be inserted are evenly distributed circumferentially on the side wall of the insertion cavity 2 located outside the first sealing ring 5. The ball 6 can only be taken out from the outside of the ball-holding hole 7. A valve core 8 is slidably disposed in the valve core cavity 3. One end of the valve core 8 can open or close the valve core hole 4, and the other end of the valve core 8 is provided with an elastic support structure that allows the valve core 8 to close the valve core hole 4 for a long time. The connector body 1 is slidably provided with a movable sleeve. A reset member is provided between the movable sleeve and the connector body 1. The reset member allows the inner wall of the head of the movable sleeve to press against the outer side of the ball bearing 6, thereby allowing the inner side of the ball bearing 6 to extend into the insertion cavity 2. An air cavity 9 is provided between the inner wall of the tail of the movable sleeve and the outer wall of the connector body 1. An air hole 10 is provided on the side wall of the movable sleeve. The air hole 10 is used to install a gas pipeline. After the air cavity 9 is filled with air through the air hole 10, the movable sleeve can move towards the tail of the connector body 1, thereby no longer pressing against the outer side of the ball bearing 6.

[0017] In use, one end of a gas pipeline is installed in the vent 10. The gas pipeline is controlled to fill the gas chamber 9 through the vent 10. If the gas pressure in the gas chamber 9 is too high and its volume increases, it will push the movable sleeve towards the tail of the connector body 1. Alternatively, the movable sleeve can be manually pushed towards the tail of the connector body 1. The head of the movable sleeve will no longer press against the outside of the ball 6, allowing the external connector to be inserted into the insertion cavity 2. The external connector then pushes open the valve core 8, thereby opening the valve core hole 4. Then, stopping the filling of the gas chamber 9 or releasing the movable sleeve will cause it to press against the outside of the ball 6 again under the action of the reset component, causing the inner side of the ball 6 to extend into the insertion cavity 2 and lock the external connector, thus connecting the present invention with the external connector. At this time, because the movable sleeve moves towards the head of the connector body 1, the volume of the gas chamber 9 decreases and returns to its original state, and the gas in the gas chamber 9 flows back into the gas pipeline. In this invention, one of the tail-connecting structures of the connector body and the external connector is connected to a gas source, and the other is connected to the object to be tested. After inflation, the object to be tested can be leak-tested, or the other can be connected to a refrigerant charging machine to charge refrigerant into equipment such as air conditioners. After leak testing or refrigerant charging is completed, the gas pipeline is controlled to inflate the gas chamber 9 through the gas hole 10. If the gas pressure in the gas chamber 9 is too high and the volume increases, it will push the movable sleeve back to the tail of the connector body 1. The head of the movable sleeve will no longer press against the outside of the ball 6, and the ball 6 will no longer lock the external connector. The valve core 8 will reset under the action of the elastic support structure, thereby closing the valve core hole 4. Then, the head of the valve core 8 will push open the external connector, thereby automatically opening the external connector. This achieves automatic disengagement of the invention from the external connector, which is convenient and labor-saving to operate. Moreover, this invention has fewer parts, the connector body 1 runs through both ends, and there are fewer sealing positions, making it less prone to leakage during use.

[0018] Preferably, the movable sleeve includes a first movable sleeve 11 and a second movable sleeve 12. The first movable sleeve 11 is used to press against the outside of the ball 6. The second movable sleeve 12 is provided with air holes 10 and forms an air cavity 9 between it and the connector body 1. The tail of the first movable sleeve 11 and the head of the second movable sleeve 12 are connected together by threads, which makes installation convenient.

[0019] Preferably, the inner wall of the first movable sleeve 11 is provided with a first shoulder 13, the connector body 1 is provided with a second shoulder 14, and the reset component is a reset spring 15. The reset spring 15 is fitted outside the connector body 1, with one end of the reset spring 15 supported on the first shoulder 13 and the other end of the reset spring 15 supported on the second shoulder 14, which is convenient for installation.

[0020] Preferably, a retaining spring 16 is embedded on the outer wall of the connector body 1, located outside the retaining bead hole 7, to prevent the first movable sleeve 11 from moving out of the head of the connector body 1. When the first movable sleeve 11 moves toward the head of the connector body 1 under the action of the return spring 15, the retaining spring 16 can prevent the first movable sleeve 11 from moving out of the connector body 1.

[0021] Preferably, a first protrusion 17 is provided on the outer wall of the middle part of the connector body 1, and a second protrusion 18 is provided on the inner wall of the tail end of the second movable sleeve 12. A second sealing ring 19 is provided between the outer wall of the first protrusion 17 and the inner wall of the second movable sleeve 12, and between the inner wall of the second protrusion 18 and the outer wall of the connector body 1. A gap is formed between the outer wall of the connector body 1 and the inner wall of the second movable sleeve 12 between the two second sealing rings 19, forming an annular air cavity 9. The structure is simple. When the first movable sleeve 11 and the second movable sleeve 12 move together toward the tail of the connector body 1, the first protrusion 17 can limit the first movable sleeve 11 to prevent the first movable sleeve 11 from completely moving out of the ball 6. An avoidance groove 20 is provided on the head of the first movable sleeve 11 for the ball 6 to partially enter.

[0022] Preferably, the connection structure is an internal thread 21 provided on the outer side of the inner wall of the valve core cavity 3, and the internal thread 21 is used to connect external pipe fittings.

[0023] Preferably, the valve core 8 has a first conical surface 22 at its head and a third sealing ring 23 located inside the first conical surface 22. The first conical surface 22 passes through the valve core hole 4 and is placed in the insertion cavity 2. The third sealing ring 23 seals the valve core hole 4 on the side near the valve core cavity 3. When the external connector pushes open the head of the valve core 8, the first conical surface 22 is opposite to the valve core hole 4, thus reserving a channel for fluid to pass through. The valve core cavity 3 and the insertion cavity 2 can be interconnected through the valve core hole 4, that is, the valve core hole 4 is opened. When the external connector is no longer pressing against the head of the valve core 8, the valve core 8 is reset under the action of the elastic support structure, and its head extends back into the insertion cavity 2. The third sealing ring 23 on the head of the valve core 8 seals the valve core hole 4 again. The setting of the first conical surface 22 also facilitates the smooth passage of the valve core 8 through the valve core hole 4.

[0024] Preferably, the valve core hole 4 has a second conical surface 24 on the side near the valve core cavity 3 that contacts the third sealing ring 23, resulting in a good sealing effect.

[0025] Preferably, the elastic support structure includes a support frame 25 that is slidably fitted onto the tail of the valve core 8, and a support spring 26 fitted onto the valve core 8 and supported between the support frame 25 and the head of the valve core 8. The support frame 25 is fixed in the valve core cavity 3, making installation convenient.

[0026] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A quick-release connector for refrigerant charging and vacuuming that can automatically pop open, comprising a connector body, characterized in that: The head of the connector body is provided with a plug-in cavity, the tail of the connector body is provided with a valve core cavity, the plug-in cavity and the valve core cavity are connected through a valve core hole, and a connecting structure is provided on the outside of the valve core cavity. The inner wall of the insertion cavity is provided with at least one first sealing ring, and the side wall of the insertion cavity located outside the first sealing ring is provided with a plurality of ball-holding holes evenly distributed circumferentially for the ball to be inserted. The ball can only be removed from the outside of the ball-holding hole. A valve core is slidably disposed in the valve core cavity. One end of the valve core can open or close the valve core hole, and the other end of the valve core is provided with an elastic support structure that allows the valve core to keep the valve core hole closed for a long time. The connector body is provided with a movable sleeve that slides outwards. A reset member is provided between the movable sleeve and the connector body. The reset member allows the inner wall of the head of the movable sleeve to press against the outer side of the ball, thereby allowing the inner side of the ball to extend into the insertion cavity. An air cavity is provided between the inner wall of the tail of the movable sleeve and the outer wall of the connector body. An air hole is provided on the side wall of the movable sleeve. After the air cavity is inflated through the air hole, the movable sleeve can move towards the tail of the connector body and no longer press against the outer side of the ball.

2. The quick-release refrigerant charging and vacuuming connector according to claim 1, characterized in that: The movable sleeve includes a first movable sleeve and a second movable sleeve, with the tail of the first movable sleeve and the head of the second movable sleeve connected together by threads.

3. The quick-release refrigerant charging and vacuuming connector according to claim 2, characterized in that: The inner wall of the first movable sleeve is provided with a first shoulder, the connector body is provided with a second shoulder, and the reset component is a reset spring. The reset spring is sleeved outside the connector body, with one end of the reset spring supported on the first shoulder and the other end of the reset spring supported on the second shoulder.

4. The quick-release refrigerant charging and vacuuming connector according to claim 2, characterized in that: A retaining ring is fitted on the outer wall of the connector body, located outside the retaining bead hole, to prevent the first movable sleeve from moving out of the head of the connector body.

5. The quick-release refrigerant charging and vacuuming connector according to claim 2, characterized in that: A first protrusion is provided on the outer wall of the middle part of the connector body, and a second protrusion is provided on the inner wall of the tail end of the second movable sleeve. A second sealing ring is provided between the outer wall of the first protrusion and the inner wall of the second movable sleeve, and between the inner wall of the second protrusion and the outer wall of the connector body. There is a gap between the outer wall of the connector body and the inner wall of the second movable sleeve between the two second sealing rings, forming an annular air cavity.

6. The quick-release refrigerant charging and vacuuming connector according to any one of claims 1-5, characterized in that: The connection structure is an internal thread located on the outer side of the inner wall of the valve core cavity.

7. The quick-release refrigerant charging and vacuuming connector according to any one of claims 1-5, characterized in that: The valve core has a first conical surface at its head and a third sealing ring located inside the first conical surface. The first conical surface passes through the valve core hole and is placed in the insertion cavity. The third sealing ring seals the valve core hole on the side near the valve core cavity.

8. The quick-release refrigerant charging and vacuuming connector according to claim 7, characterized in that: The valve core hole has a second conical surface on the side near the valve core cavity that contacts the third sealing ring.

9. The quick-release refrigerant charging and vacuuming connector according to any one of claims 1-5, characterized in that: The elastic support structure includes a support frame that slides onto the tail of the valve core, and a support spring that is fitted outside the valve core and supported between the support frame and the head of the valve core. The support frame is fixed in the valve core cavity.

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