Compressor air intake structure

Abstract

A compressor air intake structure, comprising a compressor housing (1) and an insertion tube (2), wherein an air intake hole (11) is formed in the compressor housing (1), the insertion tube (2) is mounted within the air intake hole (11), and the insertion tube (2) is in interference fit with the air intake hole (11); a groove (12) is provided on the inner wall of the air intake hole (11), and the groove (12) and the insertion tube (2) enclose a thermal insulation cavity (15) therebetween.

Description

Compressor intake structure

[0001] This application claims priority to Chinese Patent Application No. 202520160988.1, filed on January 23, 2025, and Chinese Patent Application No. 202510110616.2, filed on January 23, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of compressor technology, for example to a compressor intake structure. Background Technology

[0003] Compressors typically have an air inlet, to which an inlet connecting pipe is inserted to allow external refrigerant to flow into the compressor. This inlet connecting pipe is usually a straight pipe, installed inside the inlet with an interference fit. During compressor operation, the compressor casing reaches a high temperature. Because the inlet connecting pipe is in complete contact with the inner wall of the compressor inlet, the contact area is large, and due to the high thermal conductivity of solids, the heat from inside the compressor flows directly through the inlet connecting pipe, heating the refrigerant. After being heated, the refrigerant's volume increases. This thermal expansion reduces the amount of refrigerant passing through the inlet connecting pipe per unit time, decreasing the refrigerant flow rate and ultimately reducing the compressor's cooling capacity, thus lowering its performance. Summary of the Invention

[0004] This application provides a compressor intake structure that solves the problem that the refrigerant is preheated during its entry into the compressor, resulting in an increase in the volume of the refrigerant and a decrease in compressor efficiency.

[0005] This application provides a compressor intake structure, including a compressor housing and a connector. An intake hole is formed on the compressor housing, and a connector is installed in the intake hole. The connector is interference-fitted with the intake hole. A groove is formed on the inner wall of the intake hole, and the groove and the connector form a heat insulation cavity.

[0006] In some embodiments, the groove is annular and surrounds the circumference of the insertion tube.

[0007] In some embodiments, the lower side of the groove is a first inlet cavity, the first inlet cavity is conical, and the insertion tube includes a first sealing portion, the first sealing portion is conical, and the diameter of the end of the first sealing portion away from the groove is greater than the diameter of the end of the first inlet cavity away from the groove.

[0008] In some embodiments, the diameter of the first sealing portion near the end of the groove is the same as the diameter of the first inlet cavity near the end of the groove.

[0009] In some embodiments, the upper side of the groove is a second inlet cavity, the second inlet cavity is conical, the insertion tube includes a second sealing portion, the second sealing portion is conical, and the diameter of the second inlet cavity away from the groove is smaller than the diameter of the second sealing portion away from the groove.

[0010] In some embodiments, the diameter of the second inlet cavity near the groove side is the same as the diameter of the second sealing portion near the groove side.

[0011] In some embodiments, the axial length L of the second sealing portion is greater than or equal to 3 mm.

[0012] In some embodiments, the axial height of the air inlet is H1, and the axial height H2 of the first sealing part is less than or equal to H1×1 / 2. Attached Figure Description

[0013] Figure 1 is a plug-in installation diagram of this application;

[0014] Figure 2 is a diagram of the main body of the insertion pipe in this application;

[0015] Figure 3 is a cross-sectional view of the insertion pipe of this application.

[0016] In the figure: 1. Compressor housing; 11. Air inlet; 12. Groove; 13. First inlet chamber; 14. Second inlet chamber; 15. Insulation chamber; 2. Connecting pipe; 21. First sealing part; 22. Second sealing part. Detailed Implementation

[0017] The present application will now be described in conjunction with the accompanying drawings and embodiments. The embodiments described herein are for the purpose of explaining the present application. It should also be noted that, for ease of description, only the parts of the structure relevant to the present application are shown in the accompanying drawings.

[0018] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the meaning of the above terms in this application as appropriate.

[0019] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or indicating that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or indicating that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first" and "second" are used for distinction in description and have no special meaning.

[0021] In the relevant technology, the air inlet in the compressor housing is cylindrical in shape, and the air inlet is tightly fitted with the connector. The inner wall of the air inlet is entirely solid with high thermal conductivity, which results in high efficiency in transferring heat from the compressor body to the connector. This causes the refrigerant to absorb more heat in a short time, causing the refrigerant to expand. Consequently, the flow rate of refrigerant entering the compressor through the air inlet per unit time decreases, reducing the compressor's working efficiency.

[0022] To solve the above problems, as shown in Figures 1 to 3, this application provides a compressor intake structure, including a compressor housing 1 and a connector 2. An intake hole 11 is formed on the compressor housing 1, and a connector 2 is installed in the intake hole 11. The connector 2 is interference-fitted with the intake hole 11. A groove 12 is formed on the inner wall of the intake hole 11, and a heat insulation cavity 15 is formed between the groove 12 and the connector 2.

[0023] A groove 12 can be formed on the inner wall of the air inlet 11 to reduce the direct contact area between the compressor cylinder and the connector 2. The groove 12 and the connector 2 form a heat insulation cavity 15. The air in the heat insulation cavity 15 contacts the connector 2. During the operation of the compressor, the compressor itself will generate a large amount of heat. The heat of the compressor will be transferred to the connector 2 through the air in the heat insulation cavity 15. Since the thermal conductivity of air is low, the heat absorbed by the refrigerant in the connector 2 will be reduced, and the volume of refrigerant expansion due to heat will be reduced. In this way, the flow rate of refrigerant entering the compressor through the air inlet 11 per unit time can be higher.

[0024] The groove 12 in this application is annular, surrounding the circumference of the connector 2. This allows the central portion of the connector 2 to directly contact the air, reducing the contact area with the inner wall of the compressor cylinder, thus decreasing heat conduction and the heat absorbed by the refrigerant. Consequently, this reduces the volume of refrigerant expansion and improves compressor efficiency. This application can also have openings at any location on the inner wall of the air inlet 11. While ensuring a tight fit between the connector 2 and the air inlet 11, this reduces the contact area between the inner wall of the compressor cylinder and the connector 2, further reducing refrigerant transfer.

[0025] The first inlet cavity 13 is located on the lower side of the groove 12. The first inlet cavity 13 is conical. The insertion pipe 2 includes a first sealing part 21, which is also conical. The diameter of the end of the first sealing part 21 away from the groove 12 is larger than the diameter of the end of the first inlet cavity 13 away from the groove 12.

[0026] After adding the groove 12, the contact area between the connector 2 and the air inlet 11 becomes smaller. To increase the contact area, the length of the connector 2 needs to be extended. During the insertion process, to avoid the connector 2 being misaligned within the air inlet 11, the first inlet cavity 13 is usually made into a cone shape, and the first sealing part 21 is also cone-shaped. This facilitates the positioning of the first inlet cavity 13 and the first sealing part 21, ensuring that they are coaxial and preventing misalignment. Since the diameter of the end of the first sealing part 21 away from the groove 12 is larger than the diameter of the end of the first inlet cavity 13 away from the groove 12, when the first sealing part 21 is fully inserted to the bottom of the first inlet cavity 13, the different tapers of the first inlet cavity 13 and the first sealing part 21 will cause an interference fit between them, achieving a seal and preventing refrigerant leakage.

[0027] The diameter of the first sealing part 21 near the groove 12 is the same as the diameter of the first inlet cavity 13 near the groove 12. After the first sealing part 21 is inserted to the designated position, the first sealing part 21 can be fully inserted into the first inlet cavity 13, which makes it easy for the insertion pipe 2 to be installed in the designated position, and also makes it easy for the second sealing part 22 to be inserted to the designated position, so that the second sealing part 22 has a sufficiently large contact area with the air inlet 11, reducing the phenomenon of refrigerant leakage.

[0028] The upper side of the groove 12 in this application is a second inlet cavity 14, which is conical. The insertion pipe 2 includes a second sealing part 22, which is also conical. The diameter of the second inlet cavity 14 away from the groove 12 is smaller than the diameter of the second sealing part 22 away from the groove 12.

[0029] Since both the second inlet cavity 14 and the second sealing part 22 are conical, the second sealing part 22 can be automatically centered during the insertion process, making the second inlet cavity 14 and the second sealing part 22 coaxial and preventing the insertion tube 2 from being misaligned. Because the diameter of the second inlet cavity 14 on the side away from the groove 12 is smaller than the diameter of the second sealing part 22 on the side away from the groove 12, the second sealing part 22 can be gradually locked during the insertion process, thereby ultimately fixing the insertion tube 2 to the air inlet 11. This ensures that there is no gap between the insertion tube 2 and the air inlet 11 on the end face of the air inlet 11, preventing refrigerant leakage.

[0030] The diameter of the second inlet cavity 14 near the groove 12 is the same as the diameter of the second sealing part 22 near the groove 12. This makes it easier for the second sealing part 22 to be smoothly inserted into the designated position, and the insertion process is more labor-saving, so that the upper side of the second sealing part 22 is flush with the end face of the air inlet 11.

[0031] The axial length L of the second sealing part 22 of this application is greater than or equal to 3 mm. The second sealing part 22 and the second inlet cavity 14 are in a fitting state. The height of the fitting surface between the second sealing part 22 and the second inlet cavity 14 is not less than 3 mm, so as to ensure the sealing performance between the plug tube 2 and the compressor.

[0032] The axial height of the air inlet 11 is H1, and the axial height of the first sealing part 21 is less than or equal to H1×1 / 2. This ensures that the second sealing part 22 has sufficient sealing length and provides enough space for the groove 12, thereby reducing the direct contact area between the insertion pipe 2 and the inner wall of the air inlet 11.

[0033] In some embodiments, this application creates a groove 12 on the inner wall of the air inlet 11, forming a heat insulation cavity 15 between the groove 12 and the connector 2. This reduces the contact area between the inner wall of the compressor air inlet 11 and the connector 2, thereby decreasing the solid heat conduction area. The contact area between the gas in the heat insulation cavity 15 and the connector 2 increases, resulting in lower gas thermal conductivity. This reduces the heat transferred to the connector through the inner wall of the air inlet 11, lowers the heat absorbed by the refrigerant, and consequently reduces the expansion of the refrigerant, thus improving the compressor's working capacity.

Claims

1. A compressor intake structure, comprising a compressor housing (1) and a connector (2), wherein an intake hole (11) is formed on the compressor housing (1), and a connector (2) is installed in the intake hole (11), the connector (2) being press-fitted with the intake hole (11), and a groove (12) is provided on the inner wall of the intake hole (11), the groove (12) and the connector (2) forming a heat insulation cavity (15).

2. The compressor intake structure according to claim 1, wherein, The groove (12) is annular and surrounds the circumference of the insertion tube (2).

3. The compressor intake structure according to claim 1, wherein, The lower side of the groove (12) is a first inlet cavity (13), which is conical. The insertion tube (2) includes a first sealing part (21), which is conical. The diameter of the end of the first sealing part (21) away from the groove (12) is greater than the diameter of the end of the first inlet cavity (13) away from the groove (12).

4. The compressor intake structure according to claim 3, wherein, The diameter of the first sealing part (21) near the end of the groove (12) is the same as the diameter of the first inlet cavity (13) near the end of the groove (12).

5. The compressor intake structure according to claim 3, wherein, The upper side of the groove (12) is a second inlet cavity (14), which is conical. The insertion tube (2) includes a second sealing part (22), which is conical. The diameter of the second inlet cavity (14) away from the groove (12) is smaller than the diameter of the second sealing part (22) away from the groove (12).

6. The compressor intake structure according to claim 5, wherein, The diameter of the second inlet cavity (14) near the groove (12) is the same as the diameter of the second sealing part (22) near the groove (12).

7. The compressor intake structure according to claim 5, wherein, The axial length L of the second sealing part (22) is greater than or equal to 3 mm.

8. The compressor intake structure according to claim 3, wherein, The axial height of the air inlet (11) is H1, and the axial height of the first sealing part (21) is H2 less than or equal to H1×1 / 2.

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