A quick connector

Abstract

This utility model discloses a quick connector, including a male connector assembly and a female connector assembly. The female connector assembly includes a locking cap, the inner wall of which is connected to the left side of the female connector body. The inner wall of the left side of the female connector body is connected to a bidirectional valve block. A push rod is provided in the center of the bidirectional valve block, and a trapezoidal surrounding sealing ring is provided on the left side of the push rod. The push rod and the trapezoidal surrounding sealing ring are connected by injection molding. The left and right sides of the trapezoidal surrounding sealing ring are trapezoidal and annular structures, respectively. The left side of the trapezoidal structure and the right side of the annular structure are tightly fitted to the left and right inner walls of the push rod groove two provided by the push rod, respectively. The trapezoidal structure has an R-angle at the connection with the annular structure. The inner wall of the trapezoidal surrounding sealing ring has a sealing ring protrusion that connects to the push rod groove one provided by the push rod. The inclined surface of the sealing ring in the trapezoidal structure of the trapezoidal surrounding sealing ring is limited by the inclined surface of the inner side of the bidirectional valve block. This utility model improves the sealing performance and reliability of the connector.

Description

Technical Field

[0001] This utility model belongs to the field of connector technology, specifically relating to a quick connector. Background Technology

[0002] Split-type air conditioners consist of an indoor unit and an outdoor unit. The indoor unit is connected to the outdoor unit via copper pipes. During installation, connecting the indoor and outdoor units typically requires professional personnel, leading to complex installation and difficult relocation. In countries like Europe and America, labor costs often exceed the installation cost. Furthermore, improper operation can cause refrigerant inside the copper pipes to leak into the air, damaging the ozone layer. Therefore, a connector device that facilitates easy installation and disassembly is needed.

[0003] Existing quick-connect female connectors use a push rod with an O-ring for sealing. The O-ring is fixed by its tension and the dimensional deviation of the push rod. When a high-pressure airflow opens the valve, a significant internal pressure difference can cause the O-ring to deform and be extruded. Closing the valve under such pressure differential conditions may lead to seal failure. Furthermore, the O-ring seal is a radial seal structure. High internal pressure can test the valve's sealing performance, posing a risk of high-pressure leakage. This could lead to refrigerant leakage, resulting in decreased or complete failure of the air conditioner's cooling and heating performance. Utility Model Content

[0004] The purpose of this invention is to provide a quick connector to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick connector, including a male connector assembly and a female connector assembly. The female connector assembly includes a locking cap, the inner wall of which is connected to the left side of the female connector body. The inner wall of the left side of the female connector body is connected to a bidirectional valve block. A push rod is provided at the center of the bidirectional valve block. The right end of the push rod is provided with a push rod limiting end and a push rod groove three. The push rod groove three is used to connect an E-type retaining ring. The push rod groove three and the E-type retaining ring are used to connect with the inner protrusion on the right side of the female connector body. A female connector spring is provided between the bidirectional valve block and the right side of the female connector body. A trapezoidal surrounding sealing ring is provided on the left side of the push rod. The left and right sides of the trapezoidal surrounding sealing ring are respectively a trapezoidal structure and a circular structure. The left side of the trapezoidal structure and the right side of the circular structure are respectively tightly fitted to the left and right inner walls of the push rod groove two provided on the push rod. The inclined surface of the sealing ring in the trapezoidal structure of the trapezoidal surrounding sealing ring is limited by the inclined surface of the inner side of the bidirectional valve block.

[0006] Preferably, the top rod and the trapezoidal surrounding sealing ring are connected by injection molding.

[0007] Preferably, the trapezoidal structure has an R-angle at the connection with the circular structure, and the trapezoidal structure has a sealing ring protrusion on the inner wall of the sealing ring that connects with the top rod groove provided by the top rod.

[0008] Preferably, the outer wall of the bidirectional valve block is provided with O-rings six and seven for sealing with the inner wall of the female connector body. The left side of the bidirectional valve block and the left side of the push rod are the contact end and the left side of the push rod connection end, respectively. The right side of the female connector body is connected to a locking connector. The connection between the locking connector and the right side of the female connector body is also provided with O-ring five. The inner wall of the right side of the locking connector is connected to a copper pipe.

[0009] Preferably, the male connector assembly includes a connector head, with an O-ring one and a male connector body respectively connected to the inner left wall and the outer right wall of the connector head, an O-ring two provided at the connection between the connector head and the male connector body, a four-leaf valve block provided on the right side inside the male connector body, and a male connector spring provided between the connector head and the four-leaf valve block.

[0010] Preferably, the four-leaf valve block is provided with a limiting end, a four-leaf valve block groove and a four-leaf valve block connecting end from left to right. The four-leaf valve block groove is used to place the O-ring three. The male connector body is also provided with a limiting end and an O-ring four on the right side.

[0011] Preferably, the four-leaf valve block connecting end mates with the push rod connecting end, and the limiting end mates with the contact end.

[0012] The technical effects and advantages of this utility model are as follows: This utility model adopts injection molding process to connect the sealing structure through injection molding, connecting and fixing the trapezoidal surrounding sealing ring and the top rod, making the two completely integrated. When there is a large internal pressure difference, there is no risk of deformation and extrusion at the trapezoidal surrounding sealing ring. Under conditions of large pressure difference, there is no possibility of sealing failure when the valve is closed. Moreover, the sealing method of this structure is a beveled sealing structure. When there is high pressure inside the valve, the high pressure can be converted to act on the sealing surface. The higher the pressure inside the valve, the better the sealing performance of the valve, thus making the product more reliable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the female connector assembly of this utility model;

[0014] Figure 2 This is a schematic diagram of the male connector assembly of this utility model;

[0015] Figure 3 This is a three-dimensional schematic diagram of the female connector assembly of this utility model;

[0016] Figure 4 This utility model Figure 1 Enlarged view of part A in the middle;

[0017] Figure 5 This utility model Figure 4 Schematic diagram of the cross-section of the valve block;

[0018] Figure 6 This is a schematic diagram of the trapezoidal surrounding sealing ring of this utility model;

[0019] Figure 7 This is a schematic diagram of the E-type snap ring of this utility model;

[0020] Figure 8 This is a schematic diagram of the top rod of this utility model.

[0021] In the diagram: 100 Connector, 110 O-ring 1, 200 Male connector body, 210 O-ring 2, 220 Male connector spring, 230 Four-leaf valve block, 231 Limiting end, 232 Four-leaf valve block groove, 233 Four-leaf valve block connecting end, 250 O-ring 4, 260 Second limiting end, 300 Locking cap, 400 Female connector body, 410 Female connector spring, 420 Type E snap ring, 430 O-ring 5, 500 Push rod, 510 Push rod groove 1, 520 Push rod groove 2, 530 Trapezoidal surrounding sealing ring, 531 Sealing ring bevel, 532 Sealing ring protrusion, 540 Push rod connecting end, 550 Push rod groove 3, 560 Push rod limiting end, 600 Two-way valve block, 610 O-ring 6, 620 O-ring 7, 630 Contact end, 700 Locking connector, 800 Copper pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figure 1-8The quick connector shown includes a male connector assembly and a female connector assembly. The female connector assembly includes a locking cap 300, the inner wall of which is connected to the left side of the female connector body 400. The inner wall of the left side of the female connector body 400 is connected to a two-way valve block 600. A push rod 500 is provided at the center of the two-way valve block 600. The right end of the push rod 500 has a push rod limiting end 560 and a push rod groove 550. The push rod groove 550 is used to connect an E-type snap ring 420. The push rod groove 550 and the E-type snap ring 420 are used to connect with the inner protrusion on the right side of the female connector body 400. A female connector spring 410 is provided between the two-way valve block 600 and the right side of the female connector body 400. A trapezoidal surrounding sealing ring 530 is provided on the left side of the top rod 500. The top rod 500 and the trapezoidal surrounding sealing ring 530 are connected by injection molding. The left and right sides of the trapezoidal surrounding sealing ring 530 are trapezoidal structures and circular structures, respectively. The left side of the trapezoidal structure and the right side of the circular structure are tightly fitted to the left and right inner walls of the top rod groove 520 provided in the top rod 500. The trapezoidal structure has an R-angle at the connection with the circular structure. The inner wall of the trapezoidal surrounding sealing ring 530 has a sealing ring protrusion 532 that connects to the top rod groove 510 provided in the top rod 500. The sealing ring inclined surface 531 in the trapezoidal structure of the trapezoidal surrounding sealing ring 530 is limited by the inner inclined surface of the bidirectional valve block 600.

[0024] Among them, the locking cap 300 can drive the connector body 400 to move, and due to the action of the push rod groove 3 550 and the E-type snap ring 420, it can drive the push rod 500 to move.

[0025] In some specific embodiments of this utility model, the outer wall of the bidirectional valve block 600 is provided with O-rings 610 and 620 for sealing with the inner wall of the female connector body 400. The left side of the bidirectional valve block 600 and the push rod 500 are respectively the contact end 630 and the push rod connection end 540. The right side of the female connector body 400 is connected to the locking connector 700. The connection between the locking connector 700 and the right side of the female connector body 400 is also provided with O-ring 430. The inner wall of the right side of the locking connector 700 is connected to the copper pipe 800.

[0026] The female connector body 400 and the locking connector 700 are connected by threads, while the copper pipe 800 and the locking connector 700 are connected by welding. Depending on the size and specifications of the copper pipe 800, different specifications of locking connectors 700 can be selected to connect with the female connector body 400.

[0027] In some specific embodiments of this utility model, the male connector assembly includes a connector 100, with an O-ring 110 connected to the inner left wall and a male connector body 200 connected to the outer right wall of the connector 100. An O-ring 210 is provided at the connection between the connector 100 and the male connector body 200. A four-leaf valve block 230 is provided on the right side inside the male connector body 200. A male connector spring 220 is provided between the connector 100 and the four-leaf valve block 230. The four-leaf valve block 230 has a limiting end 231, a four-leaf valve block groove 232 and a four-leaf valve block connecting end 233 from left to right. The four-leaf valve block groove 232 is used to place an O-ring 3 240. A second limiting end 260 and an O-ring 4 250 are also provided on the right side of the male connector body 200. The four-leaf valve block connecting end 233 cooperates with the push rod connecting end 540, and the second limiting end 260 cooperates with the contact end 630.

[0028] The connector 100 and the male connector body 200 are connected by threads. The limiting end of the four-leaf valve block 230 can make the four-leaf valve block 230 slide smoothly. The second limiting end 260 cooperates with the contact end 630 to make the locking cap 300 drive the push rod 500 to slide relative to the bidirectional valve block 600, so that the four-leaf valve block connecting end 233 contacts the push rod connecting end 540.

[0029] In use, the male connector assembly is engaged with the female connector assembly. The locking cap 300 of the female connector assembly connects to the male connector body 200. The threaded movement drives the push rod 500 to move, thereby pushing open the four-leaf valve block 230 inside the male connector assembly, forming the entire passage and ensuring refrigerant flow. When the male connector assembly and the female connector assembly are released, the springs of the male and female connectors respectively push the four-leaf valve block 230 and the bidirectional valve block 600, ensuring their respective sealing and sealing the refrigerant in their respective pipelines to prevent leakage. Furthermore, because the trapezoidal surrounding sealing ring 530 has a sloping sealing structure, when there is high pressure inside the valve, the high pressure can be converted to act on the sealing surface. The higher the pressure inside the valve, the better the sealing performance of the valve.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick connector comprising a male connector assembly, a female connector assembly, characterized in that: The female joint assembly comprises a locking cap (300), the inner wall of the locking cap (300) is connected with a female joint body (400) left side, the left side inner wall of the female joint body (400) is connected with a bidirectional valve block (600), the inner center of the bidirectional valve block (600) is provided with a ejector rod (500), the right end of the ejector rod (500) is provided with an ejector rod limiting end (560) and an ejector rod groove three (550), the ejector rod groove three (550) is used for connecting an E-shaped clamp spring (420), the ejector rod groove three (550) and the E-shaped clamp spring (420) are used for being connected with the right side inner protrusion of the female joint body (400), the right side between the bidirectional valve block (600) and the female joint body (400) is provided with a female joint spring (410), the left side of the ejector rod (500) is provided with a ladder type surrounding sealing ring (530), the left side and the right side of the ladder type surrounding sealing ring (530) are a trapezoidal structure and a circular ring structure respectively, the left side of the trapezoidal structure and the right side of the circular ring structure are tightly combined with the left and right inner walls of an ejector rod groove two (520) provided on the ejector rod (500) respectively, and the sealing ring inclined surface (531) in the trapezoidal structure of the ladder type surrounding sealing ring (530) is limited by the inner side inclined surface of the bidirectional valve block (600).

2. A quick coupling according to claim 1, characterized in that: The ejector rod (500) and the ladder type surrounding sealing ring (530) are connected by an injection molding process.

3. A quick coupling according to claim 1, characterized in that: The trapezoidal structure is provided with an R angle at the connection with the circular ring structure, and the inner wall of the ladder type surrounding sealing ring (530) is provided with a sealing ring protrusion (532) connected with an ejector rod groove one (510) provided on the ejector rod (500).

4. A quick coupling according to claim 1, characterized in that: The outer wall of the bidirectional valve block (600) is provided with an o-shaped ring six (610) and an o-shaped ring seven (620) used for sealing with the inner wall of the female joint body (400), the left side of the bidirectional valve block (600) and the ejector rod (500) are respectively a contact end (630) and an ejector rod connecting end (540), the right side of the female joint body (400) is connected with a locking joint (700), the right side connecting part of the locking joint (700) and the female joint body (400) is further provided with an o-shaped ring five (430), and the right inner wall of the locking joint (700) is connected with a copper pipe (800).

5. A quick connector according to claim 1, wherein: The male joint assembly comprises a coupling head (100), the left inner wall and the right outer wall of the coupling head (100) are respectively connected with an o-shaped ring one (110) and a male joint body (200), the coupling head (100) and the male joint body (200) are provided with an o-shaped ring two (210) at the connecting part, the right inner side of the male joint body (200) is provided with a four-leaf valve block (230), and the coupling head (100) and the four-leaf valve block (230) are provided with a male joint spring (220).

6. A quick coupling according to claim 5, characterized in that: The four-leaf valve block (230) is provided with a limiting end (231), a four-leaf valve block groove (232) and a four-leaf valve block connecting end (233) from left to right, the four-leaf valve block groove (232) is used for placing an o-shaped ring three (240), and the right side of the male joint body (200) is further provided with a second limiting end (260) and an o-shaped ring four (250).

7. A quick coupling according to claim 6, characterized in that: The four-leaf valve block connecting end (233) cooperates with the ejector rod connecting end (540), and the second limiting end (260) cooperates with the contact end (630).

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