Air inlet structure of compressor

Abstract

The utility model belongs to the technical field of compressors, and discloses an air inlet structure of a compressor. The compressor comprises a compressor shell and an insertion pipe, an air inlet hole is formed in the compressor shell, the insertion pipe is installed in the air inlet hole and is in interference fit with the air inlet hole, a groove is formed in the inner wall of the air inlet hole, and a heat insulation cavity is defined between the groove and the insertion pipe; the problems that in the prior art, refrigerants are heated in advance in the process of entering a compressor, the size of the refrigerants is increased, and the efficiency of the compressor is reduced are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field especially relates to a compressor air inlet structure. BACKGROUND

[0002] The compressor is usually provided with an air inlet, and an air inlet connecting pipe is inserted into the air inlet to guide the refrigerant from the outside into the compressor. The air inlet connecting pipe is usually in the form of a straight pipe and is installed in the air inlet by interference fit. During the operation of the compressor, the temperature of the compressor shell is relatively high. Since the air inlet connecting pipe is completely attached to the inner wall of the air inlet of the compressor and has a large contact area, and the solid thermal conductivity is relatively high, the temperature in the compressor will directly enter the air inlet through the air inlet connecting pipe. This will heat the refrigerant. After the refrigerant is heated, the volume of the refrigerant will increase. After the refrigerant is heated and expanded, the amount of refrigerant passing through the air inlet connecting pipe will decrease, and the flow rate of the refrigerant will decrease. Ultimately, the refrigerating capacity of the compressor will decrease, and the working performance of the compressor will decrease. SUMMARY

[0003] The utility model discloses a compressor air inlet structure, solves the problem that the refrigerant is heated in advance during entering the compressor in the prior art, the volume of the refrigerant increases, and the efficiency of the compressor decreases.

[0004] To achieve this purpose, the utility model adopts the following technical scheme: the utility model provides a kind of compressor air inlet structure, including compressor shell and plug-in pipe, the air inlet hole is formed on the compressor shell, the plug-in pipe is installed in the air inlet hole, the plug-in pipe is interference fit with the air inlet hole, recess is opened on the inner wall of the air inlet hole, and the recess and the plug-in pipe form a heat insulation cavity.

[0005] Preferably, the recess is annular, and the recess surrounds the plug-in pipe in the circumferential direction.

[0006] Preferably, the lower side of the recess is a first inlet cavity, the first inlet cavity is conical, the plug-in pipe includes a first sealing portion, the first sealing portion is conical, and the diameter of the first sealing portion at the end away from the recess is greater than the diameter of the first inlet cavity at the end away from the recess.

[0007] Preferably, the diameter of the first sealing portion at the end close to the recess is the same as the diameter of the first inlet cavity at the end close to the recess.

[0008] Preferably, the upper side of the recess is a second inlet cavity, the second inlet cavity is conical, the plug-in pipe includes a second sealing portion, the second sealing portion is conical, and the diameter of the second inlet cavity at the end away from the recess is less than the diameter of the second sealing portion at the end away from the recess.

[0009] As preferably, the diameter of the second entering cavity near the groove side is same as the diameter of the second sealing part near the groove side.

[0010] As preferably, the axis length of the second sealing part is greater than or equal to 3mm.

[0011] As preferably, the axis height of the air inlet hole is H1, and the axis height of the first sealing part is less than or equal to H1*1 / 2.

[0012] Beneficial effect: by setting the groove on the inner wall of the air inlet hole, the heat insulation cavity is surrounded between the groove and the plug-in pipe, the contact area of the compressor air inlet hole inner wall and the plug-in pipe becomes smaller, the solid heat conduction area is reduced, the gas in the heat insulation cavity contacts the plug-in pipe with larger area, the gas heat conductivity is lower, the heat transferred to the plug-in pipe through the air inlet hole inner wall is reduced, the heat absorbed by the refrigerant is reduced, and then the refrigerant accumulation expansion range can be reduced, and the working capacity of the compressor can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is the plug-in installation drawing of the utility model;

[0014] Fig. 2 is the plug-in pipe main view of the utility model;

[0015] Fig. 3 is the plug-in pipe installation sectional view of the utility model.

[0016] In the drawing: 1, compressor shell; 11, air inlet hole; 12, groove; 13, first entering cavity; 14, second entering cavity; 2, plug-in pipe; 21, first sealing part; 22, second sealing part. DETAILED DESCRIPTION

[0017] The utility model will be further explained in detail below by combining with the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the utility model, and not limited to the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all the structures.

[0018] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through the intermediate medium; it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0019] In this invention, unless otherwise explicitly 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 directly above or diagonally above the second feature, or simply indicates 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 directly below or diagonally below the second feature, or simply indicates 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. They are used only for ease 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0021] In the current 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 period of 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, such as Figs. 1 to 3 As shown, this utility model 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 provided on the inner wall of the intake hole 11, and a heat insulation cavity 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. The air in the heat insulation cavity comes into contact with 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. 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] It needs to be particularly pointed out that the recess 12 is annular, the recess 12 surrounds the circumference of the plug-in pipe 2, the middle position of the plug-in pipe 2 directly contacts with air, the area of contact with the inner wall of the compressor cylinder is reduced, the heat conduction effect is reduced, the heat absorbed by the refrigerant is reduced, and then the volume of the refrigerant that can be expanded is reduced, the efficiency of the compressor is improved, the utility model also can be opened on the inner wall of the air inlet hole 11 at any position, under the condition that the plug-in pipe 2 and the air inlet hole 11 are matched tightly, the area of contact between the inner wall of the compressor cylinder and the plug-in pipe 2 can be further reduced, and then the refrigerant transmission can be reduced.

[0025] The lower side of the recess 12 is a first entering cavity 13, the first entering cavity 13 is conical, the plug-in pipe 2 comprises a first sealing part 21, the first sealing part 21 is conical, and the diameter of the far end of the first sealing part 21 from the recess 12 is greater than the diameter of the far end of the first entering cavity 13 from the recess 12.

[0026] The contact area between the plug-in pipe 2 and the air inlet hole 11 is small after the recess 12 is added, in order to increase the contact area, the length of the plug-in pipe 2 needs to be lengthened, in the plug-in process, in order to avoid the phenomenon that the plug-in pipe 2 is offset in the air inlet hole 11, the first entering cavity 13 is usually conical, and the first sealing part 21 is also conical, so that the first entering cavity 13 and the first sealing part 21 can be positioned, the first entering cavity 13 and the first sealing part 21 are coaxial, the above-mentioned two will not appear offset phenomenon, since the diameter of the far end of the first sealing part 21 from the recess 12 is greater than the diameter of the far end of the first entering cavity 13 from the recess 12, when the first sealing part 21 is completely plugged into the bottom of the first entering cavity 13, due to the different tapers of the first entering cavity 13 and the first sealing part 21, the first sealing part 21 and the first entering cavity 13 can realize interference fit, the first sealing part 21 and the first entering cavity 13 realize sealing, and refrigerant leakage is avoided.

[0027] The diameter of the end of the first sealing part 21 close to the recess 12 is the same as the diameter of the end of the first entering cavity 13 close to the recess 12, after the first sealing part 21 is plugged to the specified position, the first sealing part 21 can be completely plugged into the first entering cavity 13, the plug-in pipe 2 can be installed at the specified position, the second sealing part 22 can be plugged to the specified position, the second sealing part 22 has a large enough contact area with the air inlet hole 11, and refrigerant leakage is reduced.

[0028] The upper side of the recess 12 of the utility model is a second entering cavity 14, the second entering cavity 14 is conical, the plug-in pipe 2 comprises a second sealing part 22, the second sealing part 22 is conical, and the diameter of the side of the second entering cavity 14 away from the recess 12 is smaller than the diameter of the side of the second sealing part 22 away from the recess 12.

[0029] Since the second entering cavity 14 and the second sealing part 22 are both conical, the second sealing part 22 can be automatically centered during the insertion process, the second entering cavity 14 and the second sealing part 22 are coaxial, and the insertion pipe 2 is prevented from being offset, since the diameter of the second entering cavity 14 away from the groove 12 is smaller than the diameter of the second sealing part 22 away from the groove 12, the second sealing part 22 can be gradually locked during the insertion process, the insertion pipe 2 is finally fixed with the air inlet hole 11, and there is no gap between the insertion pipe 2 and the air inlet hole 11 on the end surface of the air inlet hole 11, so that leakage of refrigerant is prevented.

[0030] The diameter of the second entering cavity 14 close to the groove 12 is the same as the diameter of the second sealing part 22 close to the groove 12, so that the second sealing part 22 can be smoothly inserted into the specified position, the insertion process is more labor-saving, and the upper side of the second sealing part 22 is flush with the end surface of the air inlet hole 11.

[0031] The axial length of the second sealing part 22 is greater than or equal to 3 mm, the second sealing part 22 is in a bonded state with the second entering cavity 14, the height of the bonding surface between the second sealing part 22 and the second entering cavity 14 cannot be less than 3 mm, and the sealing property of the insertion pipe 2 and the compressor is ensured.

[0032] The axial height of the air inlet hole 11 is H1, and the axial height of the first sealing part 21 is less than or equal to H1*1 / 2, so that the second sealing part 22 has sufficient sealing length, and sufficient space is left for the groove 12, and the direct contact area between the insertion pipe 2 and the inner wall of the air inlet hole 11 is reduced.

[0033] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A compressor intake structure, characterized by, The application relates to a compressor shell (1) and a plug pipe (2), the compressor shell (1) is provided with an air inlet hole (11), the plug pipe (2) is arranged in the air inlet hole (11), the plug pipe (2) is in interference fit with the air inlet hole (11), a recess (12) is arranged on the inner wall of the air inlet hole (11), and a heat insulation cavity is formed between the recess (12) and the plug pipe (2).

2. The compressor inlet structure of claim 1, wherein The recess (12) is annular, and the recess (12) surrounds the circumference of the plug pipe (2).

3. The compressor inlet structure of claim 1, wherein The lower side of the recess (12) is a first entering cavity (13), the first entering cavity (13) is conical, the plug pipe (2) comprises a first sealing part (21), the first sealing part (21) is conical, and the diameter of the first sealing part (21) at the end far from the recess (12) is larger than the diameter of the first entering cavity (13) at the end far from the recess (12).

4. The compressor inlet structure of claim 3, wherein The diameter of the first sealing part (21) at the end close to the recess (12) is the same as the diameter of the first entering cavity (13) at the end close to the recess (12).

5. The compressor inlet structure of claim 3, wherein The upper side of the recess (12) is a second entering cavity (14), the second entering cavity (14) is conical, the plug pipe (2) comprises a second sealing part (22), the second sealing part (22) is conical, and the diameter of the second entering cavity (14) at the side far from the recess (12) is smaller than the diameter of the second sealing part (22) at the side far from the recess (12).

6. The compressor inlet structure of claim 5, wherein, The diameter of the second entering cavity (14) at the side close to the recess (12) is the same as the diameter of the second sealing part (22) at the side close to the recess (12).

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

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

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