A compressor

Abstract

The present invention provides a compressor. The compressor includes: a housing; a motor assembly; a compression component, the compression component including: a cylinder; an upper cylinder head, disposed at one end of the cylinder; a lower cylinder head, disposed at the other end of the cylinder, forming a compression space with the cylinder and the upper cylinder head; the cylinder also including an air intake hole, the air intake hole communicating with the compression space; an air intake connecting pipe, including an air intake end and an air outlet end, the air outlet end of the air intake connecting pipe extending through the side wall of the housing into the air intake hole of the cylinder and communicating with the compression space; an air intake pipe, one end of the air intake pipe extending into the air intake end of the air intake connecting pipe, the other end of the air intake pipe being passed through a liquid reservoir; and a bushing disposed in the air intake connecting pipe and located at the air outlet end of the air intake connecting pipe.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration, and in particular to a compressor. Background Art

[0002] Generally, a hermetic compressor includes a motor for generating a driving force in an inner space of a housing, and a compression part coupled to the motor for compressing a refrigerant.

[0003] Currently, some compressors experience secondary stress fluctuations between 4 and 6 seconds after startup when testing pipeline stress and strain. Specifically, during this period, when the compressor is operating steadily and establishing operating conditions, existing compressors experience issues with the suction path design, causing refrigerant in the reservoir to rapidly flow into the compression chamber and directly into the pump body. This, in turn, causes compressor vibration and secondary stress fluctuations, which can impact compressor reliability. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a compressor that can slow down the flow of refrigerant into the compression space, thereby reducing or avoiding vibration in the compressor and the formation of secondary stress fluctuations.

[0005] According to one aspect of the present invention, there is provided a compressor, a housing;

[0006] A motor assembly is accommodated in the housing, and the motor assembly includes a crankshaft;

[0007] A compression component, comprising:

[0008] The cylinder includes an air intake hole;

[0009] an upper cylinder cover, disposed at one end of the cylinder;

[0010] A lower cylinder cover is provided at the other end of the cylinder, forming a compression space with the cylinder and the upper cylinder cover, and the air intake hole is in communication with the compression space;

[0011] The cylinder, the upper cylinder head, and the lower cylinder head are each provided with a through hole, and the crankshaft is inserted into the compression space through the through hole to transmit the rotational force of the motor assembly to the cylinder to compress the refrigerant;

[0012] an air intake connecting pipe, the air intake connecting pipe comprising an air intake end and an air outlet end, the air outlet end of the air intake connecting pipe passing through the side wall of the shell and extending into the air intake hole of the cylinder, and communicating with the compression space;

[0013] an air intake pipe, one end of which extends into the air intake end of the air intake connecting pipe, and the other end of which is inserted into a liquid reservoir; and

[0014] A bushing is arranged in the air intake connecting pipe and is located at the air outlet end of the air intake connecting pipe.

[0015] Preferably, an outer wall of the bushing and an inner wall of the air intake connecting pipe are in interference fit.

[0016] Preferably, an outer wall of the air intake pipe and an inner wall of the air intake connecting pipe are in interference fit.

[0017] Preferably, the end surface of the bushing on the same side as the air outlet end of the air intake connecting pipe is flush with the end surface of the air outlet end of the air intake connecting pipe.

[0018] Preferably, the air intake pipe includes an extension portion passing through the liquid reservoir.

[0019] Preferably, the bushing and the air suction hole form an air suction channel, and the ratio of the volume of the extension portion to the volume of the air suction channel is X, wherein: X≥16 or X≤10.

[0020] Preferably, a ratio X of the volume of the extension portion to the volume of the air intake passage is 9.07.

[0021] Preferably, a ratio X of the volume of the extension portion to the volume of the air intake passage is 16.38.

[0022] Preferably, the ratio of the axial length of the bushing to the axial length of the air intake passage is 0.5-1.

[0023] Preferably, the wall thickness of the bushing is 0.5-1 mm.

[0024] The compressor provided in an embodiment of the present invention includes a bushing within the intake connecting pipe. This bushing effectively slows the flow of refrigerant into the compression space, preventing large amounts of refrigerant from directly entering the compression space and causing compressor vibration and secondary stress fluctuations. Furthermore, when the ratio between the volume of the extended portion of the intake pipe and the volume of the intake passage is greater than or equal to 16 or less than or equal to 10, the bushing can be used to further slow the flow of refrigerant into the compression space, reducing the likelihood of secondary stress fluctuations and thereby increasing the reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0026] Figure 1This is a schematic cross-sectional structural diagram of a compressor according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A partial enlarged view of the suction passage of the compressor; and

[0028] Figure 3 for Figure 2 Schematic diagram of the enlarged area A in FIG.

[0029] Reference numerals:

[0030] 1 Bushing

[0031] 2 Housing

[0032] 3 Motor assembly

[0033] 31 Crankshaft

[0034] 311 Rotating Piston

[0035] 32 inner rotor

[0036] 33 External stator

[0037] 4 Upper cylinder head

[0038] 5 cylinders

[0039] 6 Lower cylinder head

[0040] 8 Intake pipe

[0041] 81 extension

[0042] 9 Reservoir

[0043] 10 Inlet connecting pipe DETAILED DESCRIPTION

[0044] The following is a detailed description of the embodiments of the present invention. Although the present invention will be described and illustrated in conjunction with certain specific embodiments, it should be noted that the present invention is not limited to these embodiments. On the contrary, modifications or equivalent substitutions of the present invention are intended to fall within the scope of the claims of the present invention.

[0045] In addition, numerous specific details are provided in the following detailed description to better illustrate the present invention. Those skilled in the art will appreciate that the present invention can be practiced without these specific details. In other instances, well-known structures and components are not described in detail in order to highlight the main purpose of the present invention.

[0046] Please also see Figure 1 and Figure 2 , Figure 1A schematic cross-sectional view of a compressor according to an embodiment of the present invention is shown; Figure 2 Shown Figure 1 A partial enlarged schematic diagram of the air intake connecting pipe 10 of the compressor. In the preferred embodiment shown in the present invention, the compressor includes a housing 2, a motor assembly 3, a compression component, an air intake pipe 8, a liquid reservoir 9 and a bushing 1.

[0047] Specifically, the motor assembly 3 is housed within the housing 2. The motor assembly 3 includes a crankshaft 31, an inner rotor 32 sleeved on the crankshaft 31, and an outer stator 33. The outer stator 33 is fixed to the housing. The inner rotor 32 is inserted into the outer stator 33 with a predetermined gap between them. The inner rotor 32 rotates through interaction with the outer stator 33.

[0048] refer to Figure 1 The crankshaft 31 is coupled to the inner rotor 32, transmitting the rotational force of the inner rotor 32 to the compression element to compress the refrigerant. The upper portion of the crankshaft 31 is positioned relative to the central axis of the housing by means of the upper support assembly. The lower portion of the crankshaft 31 is positioned relative to the central axis of the housing by means of the upper and lower cylinder heads 4 and 6 of the compression element (see below).

[0049] refer to Figure 1 The compression component is housed in the housing. Figure 1 In the embodiment shown, the compression component is disposed on the lower side of the motor assembly. Specifically, the compression component includes: a cylinder 5, vanes (not shown) for isolating the high and low pressure chambers in the cylinder 5, and an upper cylinder head 4 and a lower cylinder head 6 disposed at both ends of the cylinder 5, which together with the cylinder 5 define a compression space and support the crankshaft 31. Figure 1 In the illustrated embodiment, the upper cylinder head 4 is located at the upper end of the cylinder 5, and the lower cylinder head 6 is located at the lower end of the cylinder 5. Each of the upper cylinder head 4 and the lower cylinder head 6 has a through hole for the crankshaft 31 to pass through. Preferably, the through hole is provided on the central axis of the housing, thereby positioning the crankshaft 31 on the central axis of the housing.

[0050] refer to Figure 1 The crankshaft 31 has a rotating piston 311 that rotates synchronously with the crankshaft 31 . The rotating piston 311 is disposed in the compression space, between the upper cylinder head 4 and the lower cylinder head 6 . The vanes are located in the vane grooves (not shown) and abut against the rotating piston 311 .

[0051] refer to Figure 2 and Figure 3An air intake connecting pipe 10 is provided through the side wall of the shell 2. The air intake connecting pipe 10 includes an air intake end and an air outlet end. The air outlet end of the air intake connecting pipe 10 is connected to the compression space through an air intake hole provided in the cylinder 2. The air intake hole is provided in the side wall of the cylinder 2 and is a through hole. The air intake hole is connected to the compression space. Figure 1 In the embodiment shown, the air intake connecting pipe 10 is provided on the right side of the housing 2. One end of the air intake pipe 8 is connected to the air intake connecting pipe 10, and the other end of the air intake pipe 8 is connected to the liquid reservoir 9. The air intake pipe 8 draws the low-temperature and low-pressure gas in the liquid reservoir 9 into the air intake connecting pipe 10, and then allows the gas to enter the compression space. In the embodiment of the present invention, the air intake pipe 8 is a round tube. Figure 1 As shown, the air intake pipe 8 includes an extension portion 81 passing through the liquid reservoir 9. The extension portion 81 can be, but is not limited to, a straight pipe.

[0052] Because some existing compressors experience secondary stress fluctuations, the present invention tested the operation of air conditioning systems. During operation and after the compressor is turned on, the current was monitored and the speed was tested using a compressor tachometer. The test results showed that secondary stress fluctuations were not related to the motor or fan, but to the compressor pump body and suction. This was primarily due to problems with the suction path design, which caused the refrigerant in the reservoir to flow rapidly into the compression space and directly into the pump body, leading to compressor vibration and secondary stress fluctuations. These secondary stress fluctuations can affect the reliability of the compressor.

[0053] In view of the above problems, in an embodiment of the present invention, the compressor includes a bushing 1. The bushing 1 is arranged in the intake connecting pipe 10 and is located at the outlet end ( Figure 2 In a preferred embodiment of the present invention, the outer wall of the bushing 1 and the inner wall of the air intake connecting pipe 10 are in an interference fit; the outer wall of the air intake pipe 8 and the inner wall of the air intake connecting pipe 10 are in an interference fit. The thickness of the bushing 1 is preferably 0.5 to 1 mm. The bushing 1 provided at the outlet end of the air intake connecting pipe 10 is equivalent to reducing the cross-sectional area of ​​the air intake pipe 8, which can slow down the flow of the refrigerant into the compression space, preventing a large amount of refrigerant from directly rushing into the compression space, causing vibration of the compressor and forming secondary stress fluctuations.

[0054] More specifically, if Figure 2 As shown, the left end face of the bushing 1 is the first end face, and the right end face is the second end face, and the second end face faces the end face of the intake end of the intake connecting pipe 10. The intake pipe 8 is connected to the intake end of the intake connecting pipe 10, and the end face of the bushing 1 on the same side as the end face of the outlet end of the intake connecting pipe 10 (i.e., the first end face) is flush with the end face of the outlet end of the intake connecting pipe 10. The bushing 1 and the intake hole form an intake channel ( Figure 1The area formed by the marks H2 and S2 is the air intake channel).

[0055] In an embodiment of the present invention, the ratio of the volume of the extension portion 81 to the volume of the intake passage is X, where: X ≥ 16 or X ≤ 10. When the ratio X between the volume of the extension portion 81 and the volume of the intake passage is within the above range, the speed at which the refrigerant flows into the compression space can be further slowed within the limited space of an existing compressor, thereby further reducing the possibility of secondary stress fluctuations, thereby increasing the reliability of the compressor.

[0056] In another preferred embodiment of the present invention, the ratio X between the volume of the extension portion 81 and the volume of the intake channel may also be equal to 9.07, wherein the length H1 of the extension portion 81 may be 124 mm, and the cross-sectional area S1 of the extension portion 81 may be 10 square millimeters; the length H2 of the intake channel may be 26 mm, and the cross-sectional area S2 of the intake channel may be 7.25 square millimeters.

[0057] In another preferred embodiment of the present invention, the ratio between the volume of the extension portion 81 and the volume of the air intake passage can be equal to 16.38. Specifically, the length H1 of the extension portion 81 can be 155 mm, and the cross-sectional area S1 of the extension portion 81 can be 10 square millimeters. The length H2 of the air intake passage can be 18 mm, and the cross-sectional area S2 of the air intake passage can be 7.25 square millimeters. This ratio and dimensions can achieve similar effects as the above embodiment and are not further described here.

[0058] Furthermore, in a preferred embodiment of the present invention, the ratio of the axial length of the bushing 1 (the length of the bushing 1 refers to the length in the same direction as the length of the intake channel) to the axial length H2 of the intake channel can be 0.5-1.

[0059] In summary, the compressor of the present invention has a bushing added to the intake connecting pipe, which can effectively slow down the speed at which the refrigerant flows into the compression space, preventing a large amount of refrigerant from directly rushing into the compression space, causing vibration in the compressor and forming secondary stress fluctuations. In addition, when the ratio between the volume of the extended portion of the intake pipe and the volume of the intake channel is greater than or equal to 16 or less than or equal to 10, the bushing can be used to further slow down the speed at which the refrigerant flows into the compression space, reducing the possibility of secondary stress fluctuations, thereby increasing the reliability of the compressor.

Claims

1. A compressor, characterized in that: The compressor comprises: case; A motor assembly is accommodated in the housing, and the motor assembly includes a crankshaft; A compression component, comprising: The cylinder includes an air intake hole; an upper cylinder cover, disposed at one end of the cylinder; A lower cylinder cover is provided at the other end of the cylinder, forming a compression space with the cylinder and the upper cylinder cover, and the air intake hole is in communication with the compression space; The cylinder, the upper cylinder head, and the lower cylinder head are each provided with a through hole, and the crankshaft is inserted into the compression space through the through hole to transmit the rotational force of the motor assembly to the cylinder to compress the refrigerant; an air intake connecting pipe, the air intake connecting pipe comprising an air intake end and an air outlet end, the air outlet end of the air intake connecting pipe passing through the side wall of the shell and extending into the air intake hole of the cylinder to communicate with the compression space; an air intake pipe, one end of which extends into the air intake end of the air intake connecting pipe, and the other end of which is inserted into a liquid reservoir; and a bushing disposed in the air intake connecting pipe and located at the air outlet end of the air intake connecting pipe; the bushing includes a first end face and a second end face, the first end face faces the air outlet end of the air intake connecting pipe, the second end face faces the air intake end of the air intake connecting pipe, the end face of the air outlet end of the air intake connecting pipe is flush with the first end face of the bushing; an outer wall of the bushing and an inner wall of the air intake connecting pipe are interference fit; The intake pipe includes an extension portion passing through the liquid reservoir; the bushing and the intake hole of the cylinder form an intake channel, and the ratio of the volume of the extension portion to the volume of the intake channel is X, where: X≥16 or X≤10.

2. The compressor according to claim 1, characterized in that The outer wall of the air intake pipe and the inner wall of the air intake connecting pipe are in interference fit.

3. The compressor according to claim 1, characterized in that The ratio X of the volume of the extension portion to the volume of the air intake passage is 9.

07.

4. The compressor according to claim 1, characterized in that A ratio X of the volume of the extension portion to the volume of the air intake passage is 16.

38.

5. The compressor according to claim 1, characterized in that The ratio of the axial length of the bushing to the axial length of the air intake passage is 0.5-1.

6. The compressor according to claim 1, characterized in that The wall thickness of the bushing is 0.5-1 mm.

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