Capillary tube assembly for refrigeration air conditioning equipment

Abstract

The utility model discloses a capillary tube assembly for refrigeration air conditioning equipment, and relates to the technical field of air conditioning equipment. The capillary tube assembly for the refrigeration air conditioning equipment comprises a fixing sleeve, a threaded groove is formed in the inner wall of the fixing sleeve, and the fixing sleeve is in threaded connection with a threaded sleeve; a first sealing ring pad is installed on one side of the positioning pin, a second sealing ring pad is installed on the other side of the positioning pin, a threaded sleeve is installed in the first sealing ring pad, a limiting sleeve is arranged in the threaded sleeve, a limiting groove is formed between the threaded sleeve and the limiting sleeve, a limiting protrusion is embedded in the limiting groove, and a second sealing ring pad is installed on one side of the limiting protrusion. The fixed sleeve is in threaded connection with the threaded sleeve, alignment is accurate during installation, and connection is simple and convenient; the maintenance time can be greatly shortened by more than 60% compared with a traditional mode, the maintenance efficiency is improved, maintenance personnel do not need complex processes and professional equipment, and the maintenance technical threshold is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, specifically to a capillary assembly for refrigeration and air conditioning equipment. Background Technology

[0002] The capillary tube in air conditioning equipment is an important throttling component that plays a crucial role in the system. It is a long, thin copper tube with a uniform inner diameter. Without complex adjustment mechanisms, it uses its length and inner diameter to throttle and reduce the pressure of the refrigerant. The high-temperature, high-pressure refrigerant liquid discharged from the compressor, after being condensed in the condenser, enters the capillary tube. Due to the small diameter and length of the capillary tube, it creates resistance to the refrigerant, causing the pressure to gradually decrease as the refrigerant passes through, changing from a high-pressure liquid state to a low-pressure liquid state. During this pressure reduction process, the refrigerant absorbs heat, and its temperature drops accordingly. Subsequently, the low-pressure, low-temperature refrigerant enters the evaporator, where it absorbs heat, achieving the cooling effect.

[0003] Traditional capillary tube connection methods, such as welding, are complex to operate when repairing or replacing capillary tubes. They require specialized welding equipment and skills, and improper welding can lead to problems such as pipe leaks and deformation. In addition, some refrigerants may contain moisture, oil, and chemical contaminants. Moisture can react chemically with refrigerants and lubricating oils to produce acidic substances that corrode metal pipes and components. Oil can adhere to the surface of heat exchangers, affecting heat exchange efficiency. Without filters to adsorb and filter these harmful substances, system performance will decline, and the probability of failure will increase significantly. Utility Model Content

[0004] The purpose of this invention is to provide a capillary assembly for refrigeration and air conditioning equipment to address the aforementioned shortcomings in the prior art.

[0005] 1. To achieve the above objectives, this utility model provides the following technical solution: a capillary assembly for refrigeration and air conditioning equipment, comprising: a fixed sleeve, wherein the inner wall of the fixed sleeve is provided with a threaded groove, and the fixed sleeve is threadedly connected to a threaded sleeve; a limiting sleeve is provided inside the threaded sleeve, a limiting groove is formed between the threaded sleeve and the limiting sleeve, a limiting protrusion is fitted inside the limiting groove, a second sealing ring is installed on one side of the limiting protrusion, and an activated carbon filter is connected to one end of the threaded sleeve.

[0006] Furthermore, the limiting sleeve has a positioning hole inside, and a positioning pin is fitted inside the positioning hole.

[0007] Furthermore, the other end of the positioning pin is installed on one side of the connecting pipe, and one end of the connecting pipe is connected to a first sealing ring gasket.

[0008] Furthermore, a limiting ring is fixedly connected to the other side of the limiting protrusion, and a threaded protrusion is provided on the outer side of the threaded sleeve.

[0009] Furthermore, a capillary tube is fixedly connected to the other end of the connecting tube, and the capillary tube is wound around the outside of the cylinder.

[0010] Furthermore, a rubber pad is connected to one end of the cylinder, and the other end of the rubber pad is installed at the coil of the capillary tube.

[0011] In the above technical solution, the capillary assembly for refrigeration and air conditioning equipment provided by this utility model has the following beneficial effects:

[0012] This utility model achieves accurate alignment and easy connection during installation by fitting a positioning pin into a positioning hole, cooperating with a limiting protrusion and a limiting groove, and connecting a fixing sleeve and a threaded sleeve. Disassembly is easy during maintenance, significantly reducing maintenance time by more than 60% compared to traditional methods, thus improving maintenance efficiency. Maintenance personnel do not require complex processes or specialized equipment, lowering the technical threshold for maintenance and reducing reliance on specialized skills. Furthermore, the activated carbon filter is filled with activated carbon particles, utilizing the adsorption properties of activated carbon to not only filter impurities but also adsorb moisture, oil, odors, and some chemical substances in the refrigerant, thereby purifying the refrigerant.

[0013] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0014] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a three-dimensional structural schematic diagram provided for this utility model embodiment;

[0017] Figure 2 This is a partial structural schematic diagram provided for this utility model embodiment;

[0018] Figure 3 This is a schematic diagram of a partially separated structure provided in this utility model embodiment;

[0019] Figure 4 This is a schematic diagram of a partially separated structure provided in this utility model embodiment.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Activated carbon filter; 2. Fixing sleeve; 3. Limiting ring; 4. Capillary tube; 5. Threaded groove; 6. Threaded protrusion; 7. Threaded sleeve; 8. Limiting sleeve; 9. Positioning hole; 10. Positioning pin; 11. First sealing ring gasket; 12. Connecting pipe; 13. Second sealing ring gasket; 14. Limiting protrusion; 15. Limiting groove; 16. Cylinder; 17. Rubber gasket. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] Please see Figures 1-4 A capillary assembly for refrigeration and air conditioning equipment includes: a fixed sleeve 2, the inner wall of which is provided with a threaded groove 5, and a threaded sleeve 7 threadedly connected to the fixed sleeve 2; a limiting sleeve 8 is provided inside the threaded sleeve 7, a limiting groove 15 is formed between the threaded sleeve 7 and the limiting sleeve 8, a limiting protrusion 14 is fitted inside the limiting groove 15, a second sealing ring gasket 13 is installed on one side of the limiting protrusion 14, an activated carbon filter 1 is connected to one end of the threaded sleeve 7, a positioning hole 9 is provided inside the limiting sleeve 8, a positioning pin 10 is fitted inside the positioning hole 9, the other end of the positioning pin 10 is installed on one side of a connecting pipe 12, a first sealing ring gasket 11 is connected to one end of the connecting pipe 12, a limiting ring 3 is fixedly connected to the other side of the limiting protrusion 14, and a threaded protrusion 6 is provided on the outer side of the threaded sleeve 7.

[0024] In a further embodiment provided by this utility model, the positioning hole 9 inside the limiting sleeve 8 is aligned with the positioning pin 10 connected to one side of the connecting pipe 12, so that they are engaged. At the same time, the limiting protrusion 14 is engaged inside the limiting groove 15. The positioning pin 10 and the positioning hole 9 are precisely matched, which can quickly determine the position of the component during installation, avoid misalignment, and greatly shorten the installation time. At the same time, the mutual engagement of the limiting protrusion 14 and the limiting groove 15 further enhances the stability of the connection and prevents the components from relative displacement during operation. The limiting protrusion 14 pushes the second sealing ring gasket 13 into the limiting groove 15. The first sealing ring gasket 11 and the second sealing ring gasket 13 respectively play a sealing role at the connection part, effectively preventing refrigerant leakage. During the process of the limiting protrusion 14 being embedded into the limiting groove 15, the second sealing ring gasket 13 is squeezed to fill the gap, enhancing the sealing effect, ensuring that the refrigerant does not leak out, maintaining stable system pressure and normal operation. At the same time, one side of the threaded sleeve 7 moves to the limiting ring 3. Since both the threaded sleeve 7 and the limiting protrusion 14 have threaded protrusions 6 on their outer sides, the threaded sleeve 7 and the limiting protrusion 14 are threadedly connected by the fixed sleeve 2 through the threaded groove 5 opened on their inner walls to provide reliable fastening force, making the connection firm and allowing for repeated disassembly and installation, which is convenient for maintenance and repair. The activated carbon filter 1 connected to one side of the threaded sleeve 7 is filled with activated carbon particles. Utilizing the adsorption characteristics of activated carbon, it can not only filter impurities, but also adsorb moisture, oil, odors and some chemicals in the refrigerant, thus purifying the refrigerant.

[0025] Furthermore, a capillary tube 4 is fixedly connected to the other end of the connecting tube 12. The capillary tube 4 is wound around the outside of the cylinder 16. A rubber pad 17 is connected to one end of the cylinder 16, and the other end of the rubber pad 17 is installed at the coil of the capillary tube 4.

[0026] In a further embodiment of this utility model, the capillary tube 4 is wound around the outer side of the cylinder 16. When the air conditioning compressor is running, it will generate vibration. This vibration will be transmitted to the capillary tube 4 through the piping system. If the vibration of the compressor is large, the capillary tube 4 will be subjected to large vibration excitation and thus vibrate. Therefore, a rubber pad 17 is placed at the coil of the capillary tube 4 where the capillary tube 4 is wound around the cylinder 16. The other side of the rubber pad 17 is connected to the cylinder 16.

[0027] In this application, the positioning hole 9 inside the limiting sleeve 8 is first aligned with the positioning pin 10 connected to one side of the connecting pipe 12, causing them to engage. Simultaneously, the limiting protrusion 14 engages with the inside of the limiting groove 15. The precise fit between the positioning pin 10 and the positioning hole 9 allows for quick determination of component positions during installation, preventing misalignment and significantly shortening installation time. Furthermore, the engagement of the limiting protrusion 14 and the limiting groove 15 further enhances the stability of the connection, preventing relative displacement of components during operation. The limiting protrusion 14 pushes the second sealing ring gasket 13 into the limiting groove 15. The first sealing ring gasket 11 and the second sealing ring gasket 13 respectively perform sealing functions at the connection points, effectively preventing refrigerant leakage. During the process of the limiting protrusion 14 being embedded into the limiting groove 15, the second sealing ring gasket 13 is squeezed to fill the gap, enhancing the sealing effect, ensuring that the refrigerant does not leak out, maintaining stable system pressure and normal operation. At the same time, one side of the threaded sleeve 7 moves to the limiting ring 3. Since both the threaded sleeve 7 and the limiting protrusion 14 have threaded protrusions 6 on their outer sides, the threaded sleeve 7 and the limiting protrusion 14 are threadedly connected by the fixed sleeve 2 through the threaded groove 5 opened on their inner walls to provide reliable fastening force, making the connection firm and allowing for repeated disassembly and installation, which is convenient for maintenance and repair. The activated carbon filter 1 connected to one side of the threaded sleeve 7 is filled with activated carbon particles. Utilizing the adsorption characteristics of activated carbon, it can not only filter impurities, but also adsorb moisture, oil, odors and some chemicals in the refrigerant, thus purifying the refrigerant.

[0028] The foregoing has only described certain exemplary embodiments of this utility model by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of this utility model. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of this utility model.

Claims

1. A capillary tube assembly for a refrigeration and air conditioning apparatus comprising: The fixed sleeve (2) is characterized in that the inner wall of the fixed sleeve (2) is provided with a threaded groove (5), and the fixed sleeve (2) is threadedly connected with a threaded sleeve (7); The threaded sleeve (7) is internally provided with a limiting sleeve (8), a limiting recess (15) is formed between the threaded sleeve (7) and the limiting sleeve (8), the limiting recess (15) is internally fitted with a limiting protrusion (14), one side of the limiting protrusion (14) is provided with a second sealing ring pad (13), and one end of the threaded sleeve (7) is connected with an activated carbon filter (1).

2. The capillary tube assembly of claim 1, wherein the capillary tube assembly is used in a refrigeration and air conditioning apparatus. The limiting sleeve (8) is internally provided with a positioning hole (9), and the positioning hole (9) is internally fitted with a positioning pin (10).

3. The capillary tube assembly of claim 2, wherein the capillary tube assembly is used in a refrigeration and air conditioning apparatus. The other end of the positioning pin (10) is mounted on one side of a connecting pipe (12), and one end of the connecting pipe (12) is connected with a first sealing ring pad (11).

4. The capillary tube assembly of claim 3, wherein the capillary tube assembly is used in a refrigeration and air conditioning apparatus. The other side of the limiting protrusion (14) is fixedly connected with a limiting circular ring (3), and the outer side of the threaded sleeve (7) is provided with a threaded protrusion (6).

5. The capillary tube assembly of claim 3, wherein the capillary tube assembly is used in a refrigeration and air conditioning apparatus. The other end of the connecting pipe (12) is fixedly connected with a capillary tube (4), and the capillary tube (4) is wound on the outer side of a cylinder (16).

6. The capillary tube assembly of claim 5, wherein the capillary tube assembly is used in a refrigeration and air conditioning apparatus. One end surface of the cylinder (16) is connected with a rubber pad (17), and the other end of the rubber pad (17) is mounted on the coil pipe of the capillary tube (4).

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