A normally closed inflation valve for inflating air conditioner pipes

Abstract

The utility model discloses a kind of air-conditioning pipeline inflation normally closed inflation valve, comprising: connector, it is the tubular structure of two ends opening, the top end of connector is used to install on the air regulator pipe of air conditioner;Sealing element, it is used to close the opening of the bottom end of connector, sealing element is slidably arranged in the cavity of connector along the axial direction of connector;Wherein, the cavity of the connector is equipped with a limit sleeve, a plurality of rest against strip arranged at equal angle around the axis of limit sleeve is equipped on limit sleeve, recessed part for being used for rest against strip to rest against is equipped on connector, limit sleeve, recessed part and the circulation port formed between two adjacent rest against strip, spring for applying the force of closing the opening of the bottom end of connector to sealing element is equipped between sealing element and limit sleeve.The utility model can improve the efficiency of inflation operation, and reduce the risk of helium leakage outside filled into air regulator pipe, while reducing helium waste also reduce the interference to detection result.

Description

Technical Field

[0001] This utility model relates to the field of inflation valves, specifically to a normally closed inflation valve for inflation of air conditioning pipelines used for leak detection of air conditioning units using helium mass spectrometry. Background Technology

[0002] When using helium mass spectrometry to detect leaks in easily leaking areas such as welded joints of air conditioner evaporators and condensers before assembly, the process mainly includes three steps: helium charging, leak detection, and helium recovery. The helium charging process involves injecting helium into the air conditioner evaporators and condensers through a charging device via the throttle pipe. This requires workers to connect the charging device and the throttle pipe, which is time-consuming and labor-intensive and cannot meet the helium charging speed requirements of modern air conditioning production lines. Furthermore, after helium charging, there is a risk that the helium in the throttle pipe may leak out from the inlet, resulting in helium waste, increased production costs, and interference with the detection structure. Utility Model Content

[0003] The purpose of this utility model is to provide a normally closed inflation valve for air conditioning pipe inflation. This inflation valve can improve the efficiency of inflation operation and reduce the risk of helium leakage from the inflation pipe. It also reduces helium waste and minimizes interference with test results.

[0004] The technical solution adopted by this utility model to solve the above problems is:

[0005] A normally closed inflation valve for air conditioning piping includes:

[0006] The connector is a tubular structure with openings at both ends. The top end of the connector is used for detachable installation on the throttle pipe of the air conditioner.

[0007] A sealing element is used to close the opening at the bottom of the connector. The sealing element is slidably disposed in the cavity of the connector along the axial direction of the connector.

[0008] The connector has a limiting sleeve inside its cavity. The limiting sleeve has several abutting strips arranged at equal angles around its central axis. The connector has a recess for the abutting strips to abut against. The cavity of the connector is divided into an upper chamber and a lower chamber by the limiting sleeve. The limiting sleeve, the recess, and two adjacent abutting strips form a flow port. The upper chamber and the lower chamber are connected by the flow port. The sealing member is located in the lower chamber. A spring is provided between the sealing member and the limiting sleeve to apply a force to the sealing member to close the opening at the bottom of the connector. The two ends of the spring abut against the sealing member and the limiting sleeve, respectively.

[0009] As a further improvement to the above technical solution, the closure includes a sliding rod and a sleeve. The sliding rod is slidably connected to the connector along the axial direction of the connector. The sleeve is fitted onto and fixed to the sliding rod. The diameter of the bottom end of the sleeve is larger than the diameter of the opening at the bottom end of the connector. The two ends of the spring abut against the sleeve and the limiting sleeve, respectively.

[0010] As a further improvement to the above technical solution, a sealing element is sleeved on the sliding rod, and a limiting block is provided at the bottom end of the sliding rod to prevent the sealing element from detaching from its bottom end. The sealing element is sandwiched between the limiting block and the sleeve.

[0011] As a further improvement to the above technical solution, the outer edge of the bottom end of the limiting sleeve extends downward relative to its inner edge to form a frustum-shaped receiving space, and the top of the spring is located in the receiving space.

[0012] As a further improvement to the above technical solution, the bottom end of the connector cavity is funnel-shaped.

[0013] As a further improvement to the above technical solution, the connector includes a first tube and a second tube for detachable connection to the throttle pipe. The limiting sleeve and the sealing element are both located in the cavity of the first tube. The second tube is sleeved on the top of the first tube. When the second tube is connected to the connector, the top of the first tube is sandwiched between the second tube and the bottom of the connector.

[0014] As a further improvement to the above technical solution, the edge of the top of the first tube is folded outward to form a folded part in the shape of an inverted frustum, and the second tube is provided with a limiting part to prevent the top of the first tube from detaching from its bottom end. When the second tube is connected to the mating head, the folded part is sandwiched between the bottom end of the mating head and the limiting part.

[0015] As a further improvement to the above technical solution, a sealing gasket is provided on the folded part, and when the second tube is connected to the mating head, the sealing gasket is sandwiched between the folded part and the mating head.

[0016] Compared with the prior art, this utility model has the following advantages and effects:

[0017] (1) By using the structural cooperation between the connector and the sealing part, this utility model facilitates the quick connection of the inflation device to the throttle pipe when the connector is installed on the throttle pipe, shortens the connection operation time before inflation, thereby improving the efficiency of inflation operation, meeting the production needs of modern air conditioning production lines, and can achieve the sealing of the throttle pipe, reducing the risk of helium gas leaking out of the throttle pipe, reducing helium gas waste and also reducing interference with the test results.

[0018] (2) By setting the limiting sleeve, this utility model realizes the setting of the inner sealing part within the limited space of the connector, which reduces the difficulty of the connector processing and manufacturing, and also facilitates the assembly of its inner sealing part, thereby ensuring the efficiency of the manufacturing and assembly of the inflation valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a normally closed inflation valve for air conditioning pipeline inflation according to this utility model.

[0020] Figure 2 This is a schematic cross-sectional view of the structure of a normally closed inflation valve for air conditioning pipeline inflation in the closed state according to this utility model.

[0021] Figure 3 Enlarged schematic diagram of a partial structure inside the connector shown.

[0022] Figure 4 This is a schematic cross-sectional view of the structure of an air conditioning pipeline inflation valve in the open state according to the present invention.

[0023] The components include: connector 1, recess 11, funnel-shaped part 12, first tube 13, second tube 14, folding part 15, limiting part 16, sealing gasket 17, sealing member 2, limiting sleeve 3, abutting strip 31, accommodating space 32, upper chamber 41, lower chamber 42, flow port 43, spring 5, sliding rod 6, limiting block 61, sleeve 7, sealing member 8, throttle pipe 9, and connector 91. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0025] See Figures 1-4This embodiment discloses a normally closed inflation valve for air conditioning pipe inflation, comprising a connector 1 and a sealing member 2. The connector 1 is a tubular structure with openings at both ends. The top end of the connector 1 is detachably mounted on the throttle pipe of the air conditioner. The sealing member 2 is used to close the opening at the bottom end of the connector 1. The sealing member 2 is slidably disposed within the cavity of the connector 1 along the axial direction of the connector 1. A limiting sleeve 3 is provided within the cavity of the connector 1. The limiting sleeve 3 is provided with a plurality of abutting strips 31 arranged at equal angles around its central axis. The connector 1 is provided with abutting strips 31 for abutting against the abutting strips 31. The recessed portion 11 can also be used to connect the connector 1 and the inflation end of the inflation device in a snap-fit ​​manner. The cavity of the connector 1 is divided into an upper chamber 41 and a lower chamber 42 by a limiting sleeve 3. The limiting sleeve 3, the recessed portion 11 and the two adjacent abutment strips 31 enclose a flow port 43. The upper chamber 41 and the lower chamber 42 are connected through the flow port 43. The sealing member 2 is located in the lower chamber 42. A spring 5 is provided between the sealing member 2 and the limiting sleeve 3 to apply a force to the sealing member 2 to close the opening at the bottom end of the connector 1.

[0026] The closure 2 includes a sliding rod 6 and a sleeve 7. The sliding rod 6 is slidably connected to the connector 1 along the axial direction of the connector 1. The sleeve 7 is sleeved and fixed on the sliding rod 6. The diameter of the bottom end of the sleeve 7 is larger than the diameter of the opening at the bottom end of the connector 1. The two ends of the spring 5 abut against the sleeve 7 and the limiting sleeve 3, respectively.

[0027] The top of the connector 1 on the inflation valve is detachably mounted on the inflation port of the air conditioning pipe via welding. Due to the pushing effect of the spring 5 on the sealing member 2, the sealing member 2 can abut against the inner side of the bottom end of the connector 1, so that the inflation valve is in a closed state under normal conditions, and at this time the bottom end of the sealing member 2 is exposed on the opening at the bottom end of the connector 1 (e.g., Figure 2 As shown in the image).

[0028] When inflating the air conditioner's throttle pipe, a mechanical pushing method can be used to push the sliding rod 6 into the connector 1 (e.g., by setting a pin on the air outlet of the inflation device, so that the pin pushes the sliding rod 6 during the process of connecting the air outlet of the inflation device to the bottom end of the connector 1), causing the sliding rod 6 to move together with the sleeve 7, thereby releasing the seal of the sleeve 7 on the bottom opening of the connector 1 (e.g.) Figure 4 As shown in the diagram, at this time, the spring 5 is compressed, and the high-pressure gas can be normally filled into the throttle pipe through the inflation valve. After the inflation is completed, after the push on the sliding rod 6 is stopped, the sleeve 7 drives the sliding rod 6 to reset together under the force of the spring 5 returning to its original state, and the sleeve 7 restores the closure of the bottom opening of the connector 1.

[0029] In this embodiment, the sliding rod 6 and the sleeve 7 can be fixedly connected by an interference fit.

[0030] See Figure 1 , Figure 2 The bottom end of the cavity of the connector 1 is funnel-shaped 12, which reduces the diameter of the opening at the bottom end of the connector 1 and ensures the sealing effect of the bottom opening of the connector 1 when the sleeve 7 abuts against the bottom end of the connector 1. At the same time, after inflation, the sliding rod 6 can guide the movement direction of the sliding rod 6 during the reset process under the action of the spring 5, ensuring the reset effect of the sliding rod 6.

[0031] See Figure 2 The connector 1 includes a first tube 13 and a second tube 14 for detachable connection to a mating head of the throttle pipe. The recess 11, the sealing element 2, and the limiting sleeve 3 are all located within the cavity of the first tube 13. The second tube 14 is fitted onto the top end of the first tube 13. When the second tube 14 is connected to the mating head, the top end of the first tube 13 is sandwiched between the second tube 14 and the bottom end of the mating head. This modular structure of the connector 1 reduces the manufacturing difficulty of the connector 1 and facilitates the assembly of the internal components of the first tube 13, ensuring the production and assembly efficiency of the inflation valve.

[0032] In this embodiment, the second tube body 14 and the connector can be fixedly connected by a threaded connection.

[0033] See Figure 2 The edge of the top end of the first tube 13 is folded outward to form a folded portion 15 in the shape of an inverted frustum. The second tube 14 is provided with a limiting portion 16 to prevent the top end of the first tube 13 from detaching from its bottom end. When the second tube 14 is connected to the mating head, the folded portion 15 is sandwiched between the bottom end of the mating head and the limiting portion 16. This facilitates the assembly of the first tube 13, the second tube 14 and the mating head, while also improving the assembly strength and sealing of the three components.

[0034] In this embodiment, the folded part 15 is provided with a sealing gasket 17. When the second tube 14 is connected to the mating head, the sealing gasket 17 is sandwiched between the folded part 15 and the mating head, which improves the sealing effect at the connection between the first tube 13 and the mating head.

[0035] See Figure 2 , Figure 3 A sealing element 8 is sleeved on the sliding rod 6, and a limiting block 61 is provided at the bottom end of the sliding rod 6 to prevent the sealing element 8 from detaching from its bottom end. The sealing element 8 is sandwiched between the limiting block 61 and the sleeve 7, which improves the sealing performance between the sliding rod 6 and the sleeve 7.

[0036] See Figure 2 , Figure 3The outer edge of the bottom end of the limiting sleeve 3 extends downward relative to its inner edge to form a frustum-shaped receiving space 32. The top end of the spring 5 is located in the receiving space 32, ensuring the stability of the top end position of the spring 5.

[0037] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A normally closed inflation valve for air conditioning pipeline inflation, characterized in that, include: The connector (1) is a tubular structure with openings at both ends. The top end of the connector (1) is used for detachable installation on the throttle pipe of the air conditioner. The sealing member (2) is used to close the opening at the bottom of the connector (1). The sealing member (2) is slidably disposed in the cavity of the connector (1) along the axial direction of the connector (1). The cavity of the connector (1) is provided with a limiting sleeve (3), and the limiting sleeve (3) is provided with several abutting strips (31) arranged at equal angles around its central axis. The connector (1) is provided with a recess (11) for the abutting strips (31) to abut. The cavity of the connector (1) is divided by the limiting sleeve (3) to form an upper chamber (41) and a lower chamber (42). The limiting sleeve (3), the recess (11) and the two adjacent abutting strips (31) form a flow port (43). The upper chamber (41) and the lower chamber (42) are connected through the flow port (43). The sealing member (2) is located in the lower chamber (42). A spring (5) is provided between the sealing member (2) and the limiting sleeve (3) to apply a force to the sealing member (2) to close the opening at the bottom of the connector (1). The two ends of the spring (5) abut against the sealing member (2) and the limiting sleeve (3) respectively.

2. The normally closed inflation valve for air conditioning pipeline inflation according to claim 1, characterized in that: The closure (2) includes a sliding rod (6) and a sleeve (7). The sliding rod (6) is slidably connected to the connector (1) along the axial direction of the connector (1). The sleeve (7) is sleeved and fixed on the sliding rod (6). The diameter of the bottom end of the sleeve (7) is larger than the diameter of the opening at the bottom end of the connector (1). The two ends of the spring (5) abut against the sleeve (7) and the limiting sleeve (3) respectively.

3. The normally closed inflation valve for air conditioning pipeline inflation according to claim 2, characterized in that: A sealing element (8) is fitted on the sliding rod (6), and a limiting block (61) is provided at the bottom end of the sliding rod (6) to prevent the sealing element (8) from detaching from its bottom end. The sealing element (8) is sandwiched between the limiting block (61) and the sleeve (7).

4. The normally closed inflation valve for air conditioning pipeline inflation according to claim 1, characterized in that: The outer edge of the bottom end of the limiting sleeve (3) extends downward relative to its inner edge to form a frustum-shaped receiving space (32), and the top of the spring (5) is located in the receiving space (32).

5. The normally closed inflation valve for air conditioning pipeline inflation according to claim 1, characterized in that: The bottom end of the cavity of the connector (1) is funnel-shaped (12).

6. The normally closed inflation valve for air conditioning pipeline inflation according to claim 1, characterized in that: The connector (1) includes a first tube (13) and a second tube (14) for detachable connection to the throttle pipe. The limiting sleeve (3) and the sealing member (2) are both located in the cavity of the first tube (13). The second tube (14) is sleeved on the top of the first tube (13). When the second tube (14) is connected to the connector, the top of the first tube (13) is sandwiched between the second tube (14) and the bottom of the connector.

7. The normally closed inflation valve for air conditioning pipeline inflation according to claim 6, characterized in that: The edge of the top of the first tube (13) is folded outward to form a folded part (15) in the shape of an inverted frustum. The second tube (14) is provided with a limiting part (16) to prevent the top of the first tube (13) from detaching from its bottom end. When the second tube (14) is connected to the mating head, the folded part (15) is sandwiched between the bottom end of the mating head and the limiting part (16).

8. The normally closed inflation valve for air conditioning pipeline inflation according to claim 7, characterized in that: A sealing gasket (17) is provided on the folded part (15). When the second tube (14) is connected to the mating head, the sealing gasket (17) is sandwiched between the folded part (15) and the mating head.

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