Air conditioner copper pipe pressure maintaining connection structure

Abstract

This utility model discloses a pressure-holding connection structure for air conditioning copper pipes, including a connector and a copper pipe. The connector has a cavity, one end of which has an external threaded joint that connects to the cavity and is connected to an inflation nozzle. The other end of the connector is an open end of the cavity, fitted with a hollow plug. The hollow plug is threadedly connected to the open end. The cavity contains several sealing rings and gaskets, with gaskets positioned between adjacent sealing rings and between the outermost sealing ring and the hollow plug. One end of the copper pipe passes through the hollow plug, gaskets, and sealing rings, and is connected to the external threaded joint. The hollow plug applies pressure to the gaskets and sealing rings, creating a tight fit between the copper pipe and the sealing rings. This utility model allows for a quick and stable connection of copper pipes and uses inflation to maintain pressure and test the pipe's sealing performance.

Description

Technical Field

[0001] This utility model relates to an improved connection structure, and more particularly to an improved connection structure for air conditioning copper pipes with pressure retention. Background Technology

[0002] In the field of air conditioning manufacturing and repair, the airtightness test after the condenser copper pipe connection, which involves maintaining a constant pressure to detect leaks—the pressure holding test—is crucial. Traditionally, quick-connect fittings are used; however, these fittings have a simple sealing structure and cannot apply pressure evenly, leading to insufficient sealing reliability under high pressure. This makes them prone to leakage, affecting the accuracy of test results and causing minor leaks to be overlooked, thus impacting the overall airtightness of the air conditioning system. Furthermore, high-pressure gas may remain inside the copper pipes after the pressure holding test, and the traditional method lacks a rapid pressure relief mechanism, posing safety hazards during disassembly. While some large companies use helium testing equipment, this equipment is expensive, and the additional cost of helium significantly increases production costs. Moreover, helium testing or water testing can easily result in leaks due to negligence, making them difficult to detect and leading to defective products leaving the factory. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a convenient, fast, stable and reliable pressure-holding connection structure for air conditioning copper pipes.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This air conditioning copper pipe pressure-holding connection structure includes a connector and a copper pipe, characterized in that: the connector has a cavity, one end of the connector has an external threaded joint that connects to the cavity, the external threaded joint is connected to an air inlet, the other end of the connector is set as the cavity opening end, the opening end is equipped with a hollow plug, the hollow plug is threadedly connected to the opening end, the cavity has several sealing rings and gaskets, the gaskets are respectively set between two adjacent sealing rings and between the outermost sealing ring and the hollow plug, one end of the copper pipe passes through the hollow plug, gaskets and sealing rings and is connected to the external threaded joint, the hollow plug applies pressure to the gaskets and sealing rings, and a tight fit is formed between the copper pipe and the sealing rings.

[0005] One end of the inflation nozzle is provided with an internal thread interface, and a sealing gasket is provided inside the internal thread interface. The other end of the inflation nozzle is an inflation interface, and a one-way inflation valve that can be manually pressed to vent air is provided inside the inflation nozzle.

[0006] There are three sealing rings and three gaskets.

[0007] The hollow plug has a screwing part on its outer circumference.

[0008] The outer circumference of the connector is provided with several spaced axial ribs.

[0009] The beneficial effects of this utility model are that the improved air conditioning copper pipe pressure-holding connection structure is easy to install and effectively improves production efficiency. It adopts a connector to connect with the copper pipe, and the hollow plug with thread adjustment applies pressure to the gasket and sealing ring, so that the copper pipe and the sealing ring form a tight fit, thereby completing a fast and stable connection between the connector and the copper pipe. Then, air is inflated into the copper pipe through the air inlet, and the connector holds the pressure. After standing for one or two days, the air is released through the air inlet and the presence of gas is observed to judge the sealing performance of the copper pipe and to detect whether the copper pipe weld is leaking. The finished product qualification rate can reach 100%. Attached Figure Description

[0010] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a side view of the structure of this utility model.

[0013] Figure 3 This utility model Figure 2 AA sectional view.

[0014] Figure 4 This utility model Figure 3 Enlarged view of part A. Detailed Implementation

[0015] The accompanying drawings illustrate the structure of this utility model, and further details will be described below with reference to the drawings. In this embodiment, see the attached drawings. Figure 1-4The pressure-holding connection structure for the air conditioner copper pipe includes a connector 1 and a copper pipe 2 (the attached diagram shows a partial copper pipe; the test object is the entire condenser copper pipe). The connector 1 has a cavity inside, and one end of the connector 1 has an external threaded joint 3 that connects to the cavity. The external threaded joint is connected to an air inlet. Preferably, one end of the air inlet has an internal threaded interface with a sealing gasket inside, which can seal with the external threaded joint 3. The other end of the air inlet is an air inlet, and the air inlet has a one-way air inlet valve that can be manually pressed to release air. This one-way air valve is an existing structure and will not be described in detail or shown in the attached diagram. The other end of the connector 1 is set as the cavity opening end, and the opening end is equipped with... A hollow plug 4 is provided, which is threadedly connected to the open end. The positional relationship between the hollow plug 4 and the open end can be adjusted by the thread. Several sealing rings 5 ​​and gaskets 6 are provided in the cavity. The sealing rings 5 ​​are preferably made of rubber, and the gaskets 6 are preferably made of metal or plastic. The gaskets 6 are respectively set between two adjacent sealing rings 5 ​​and between the outermost sealing ring 5 and the hollow plug 4. The gaskets 6 provide force support for the sealing rings 5. One end of the copper tube 2 passes through the hollow plug 4, the gaskets 6 and the sealing rings 5 ​​and is connected to the external threaded connector 3. The hollow plug 4 applies pressure to the gaskets 6 and the sealing rings 5, and a tight fit is formed between the copper tube 2 and the sealing rings 5.

[0016] The working principle of this utility model is as follows: One end of the copper tube 2 is matched and passed through the hollow plug 4, gasket 6, and sealing ring 5, and connected to the external threaded connector 3. Then, the hollow plug 4 is screwed on, causing it to rotate into the connector 1 and apply pressure to the gasket 6 and sealing ring 5. The sealing ring 5 is evenly stressed and deformed. The outer circle of the sealing ring 5 is tightly supported in the cavity of the connector 1, and the inner circle of the sealing ring 5 tightly hugs and evenly presses the copper tube 2, forming a stable and reliable connection for the copper tube 2. The sealing ring 5 also plays a sealing role, ensuring the airtightness of the connection between the copper tube 2 and the external threaded connector 3. The other end of the copper tube 2 is sealed by a plug and other structures. Then, an air pump is connected to the air inlet to inflate the copper tube 2. After inflation, the connector 1 automatically maintains pressure. The copper tube 2 can then be placed in a water tank to observe whether water bubbles emerge, in order to detect whether the weld of the copper tube 2 is leaking. It can also be left to stand for a period of time, and then the one-way air valve can be manually pressed to observe whether air comes out, in order to detect the pressure holding and leakage of the copper tube 2. When the pressure is maintained properly, the high-pressure air can be released by manually pressing the one-way inflation valve before disconnecting the connector to improve safety.

[0017] As a further improvement, three sealing rings 5 ​​and three gaskets 6 are provided. The reasonable number of these gaskets allows for better and more even pressure application to the copper tube 2, thereby improving connection stability.

[0018] As a further improvement, the hollow plug 4 is provided with a screwing part 41 on its outer circle, which makes it easy to rotate the hollow plug 4. Workers can manually screw it to quickly apply pressure without the need for special tools.

[0019] As a further improvement, the outer circle of the connector 1 is provided with a number of spaced axial ribs 11 to increase strength and provide a tightening force.

[0020] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An air conditioning copper pipe pressure-holding connection structure, comprising a connector and a copper pipe, characterized in that: The connector has a cavity, and one end of the connector has an external threaded joint that connects to the cavity. The external threaded joint is connected to an air inlet. The other end of the connector is set as the cavity opening end, and the opening end is equipped with a hollow plug. The hollow plug is threadedly connected to the opening end. The cavity has several sealing rings and gaskets. The gaskets are respectively set between two adjacent sealing rings and between the outermost sealing ring and the hollow plug. One end of the copper tube passes through the hollow plug, gaskets and sealing rings and is connected to the external threaded joint. The hollow plug applies pressure to the gaskets and sealing rings, and a tight fit is formed between the copper tube and the sealing rings.

2. The air conditioning copper pipe pressure-maintaining connection structure as described in claim 1, characterized in that: One end of the inflation nozzle is provided with an internal thread interface, and a sealing gasket is provided inside the internal thread interface. The other end of the inflation nozzle is an inflation interface, and a one-way inflation valve that can be manually pressed to vent air is provided inside the inflation nozzle.

3. The air conditioning copper pipe pressure-holding connection structure as described in claim 1, characterized in that: There are three sealing rings and three gaskets.

4. The air conditioning copper pipe pressure-maintaining connection structure as described in claim 1, characterized in that: The hollow plug has a screwing part on its outer circumference.

5. The air conditioning copper pipe pressure-maintaining connection structure as described in claim 1, characterized in that: The outer circumference of the connector is provided with several spaced axial ribs.

Images