Compressor shell and compressor

Abstract

The invention provides a compressor shell (10) which comprises a motor containing cavity (11) used for containing a motor; and the at least two independent cooling flow channels (12 and 13) are arranged around the periphery of the motor accommodating cavity (11) and are sequentially arranged along the axial direction of the motor.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a compressor housing and a compressor. Background Art

[0002] In current compressors, the motor is integrated into the compressor housing as a part of the compressor, so that the movement and torque transmission between the motor and the screw rotor are completed inside the closed compressor housing. There is no need for dynamic sealing to the outside, which improves the sealing and safety of the compressor.

[0003] like Figure 1 As shown, in the current motor cooling structure of the compressor, the motor arranged in the compressor housing is usually cooled by means of a cooling medium with a relatively low temperature (such as air). The temperature of the cooling medium is relatively low when the motor is initially cooled. After gradually exchanging heat with the motor, at the end of cooling the motor, the temperature of the cooling medium will increase, thereby causing the cooling environment temperature of the entire motor to be unevenly distributed, presenting an uneven cooling situation. At this time, insufficient cooling in the high-temperature zone becomes a limitation on the operation of the motor, while the cooling in the low-temperature zone is too sufficient, so that the motor fails to exert its maximum performance, and thus the overall cooling effect of the motor fails to reach the optimal working state.

[0004] The motor cooling performance will affect the reliability, energy efficiency and service life of the motor, especially the insulation life of the motor. For the existing structure, the cooling effect of the motor is completely dependent on the structure of the cooling channel inside the compressor. The motor needs to be operated in a cooling environment with uniform cooling and stable temperature.

[0005] As a power source, the noise and vibration of the motor will affect the overall noise and vibration level of the compressor. Reducing and isolating the motor vibration noise is also an important factor in reducing the vibration noise level of the compressor.

[0006] Currently, compressors usually use a single cooling channel and a single-wall shell. The temperature distribution of the motor cooling environment is uneven, and the motor vibration and noise are also obvious during compressor operation.

[0007] This application will improve the uniformity and stability of the cooling environment temperature field of the motor, while enhancing the vibration and noise reduction level of the same-level motor in the compressor. Summary of the invention

[0008] The present application provides a compressor housing, comprising:

[0009] A motor accommodating chamber, used for accommodating the motor;

[0010] At least two independent cooling channels are arranged around the outer periphery of the motor accommodating chamber and are arranged in sequence along the axial direction of the motor.

[0011] In some embodiments, the housing portion of the compressor housing that forms the motor accommodating cavity is constructed as a double-wall structure, including an outer wall and an inner wall, and a cooling cavity is formed between the outer wall and the inner wall.

[0012] In some embodiments, the at least two independent cooling channels are located on the inner surface of the inner wall.

[0013] In some embodiments, the at least two independent cooling channels are configured as channels formed by grooves on the inner surface.

[0014] In some embodiments, the at least two independent cooling channels are configured as pipes embedded in the inner surface.

[0015] In some embodiments, reinforcing ribs are provided on both the inner surface of the outer wall and the outer surface of the inner wall along the circumferential direction.

[0016] In some embodiments, the cooling cavity is through-going for the cooling medium to pass through.

[0017] In some embodiments, the cooling cavity includes at least two silencer cavities with different volumes for absorbing noise entering therein.

[0018] In some embodiments, the cooling cavity is configured as a sound-absorbing structure, an air inlet of the cooling cavity is connected to the outside, and an air outlet of the cooling cavity is closed.

[0019] In some embodiments, respective air inlets and respective air outlets of at least two independent cooling channels are independent of each other.

[0020] In some embodiments, at least two independent cooling channels are evenly spaced and arranged around the periphery of the motor accommodating chamber.

[0021] According to another aspect, the present application provides a compressor, including a compressor housing and a motor, wherein the motor is located in the motor accommodating cavity.

[0022] In some embodiments, the compressor comprises a compressor suction port for external air to enter the interior of the compressor housing, and the at least two fluid passages are in fluid communication with the compressor suction port.

[0023] In some embodiments, the compressor suction port is in fluid communication with the cooling cavity.

[0024] In some embodiments, the compressor comprises a semi-hermetic screw compressor.

[0025] By independently arranging multiple cooling channels in sections on the circumference of the motor, independent cooling of the motor in different regions along the entire axial dimension is achieved, so that each region maintains consistent cooling, thereby achieving the purpose of improving the uniformity and stability of the temperature field of the motor cooling environment.

[0026] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 is a schematic diagram of the structure of the current compressor;

[0029] Figure 2 is a schematic structural diagram of a compressor according to an embodiment of the present application;

[0030] Figure 3 for Figure 2 A cross-sectional view of the compressor shown;

[0031] Figure 4 is a schematic structural diagram of the first cooling channel 12;

[0032] Figure 5 is a schematic structural diagram of the second cooling channel 13; and

[0033] Figure 6 It is a schematic diagram of the assembly structure of the first cooling channel 12 and the second cooling channel 13;

[0034] Figure numerals: 10, compressor housing; 11, motor accommodating chamber; 12, first cooling channel; 13, second cooling channel; 14, housing outer wall; 15, housing inner wall; 16, cooling cavity; 20, motor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present application. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0039] Figure 2 A compressor according to an embodiment of the present application is shown. The compressor includes a compressor housing 10 and a motor 20 . The motor 20 is arranged in the compressor housing 10 .

[0040] Figure 3 It shows that Figure 2The cross-sectional view of the compressor shown in the figure shows that a motor accommodating chamber 11 is provided in the compressor housing 10, and the motor 20 of the compressor is arranged in the motor accommodating chamber 11. At least two independent cooling channels are provided between the compressor housing 10 and the motor 20, so that the cooling medium flows through them to take away the heat of the motor 20. At least two independent cooling channels are arranged around the periphery of the motor accommodating chamber 11, and the motor 20 is arranged in the motor accommodating chamber 11. At least two independent cooling channels are arranged on the periphery of the motor 20 and are independent of each other. At least two independent cooling channels are arranged in sequence front and back along the axial direction of the motor 20, that is, the air inlets of at least two independent cooling channels are independent of each other, and the air outlets of at least two independent cooling channels are also independent of each other. The air from the compressor suction port synchronously enters the air inlets of at least two independent cooling channels and then is discharged from their respective air outlets. In this way, multiple independent cooling channels can be used to synchronously and segmentally cool each region of the motor 20, so that the cooling of each region of the motor 20 remains consistent, and there is no situation of insufficient local cooling or excessive local cooling.

[0041] The temperature distribution of the motor in the flow direction of the cooling medium is relatively uniform, the temperature difference between the beginning and the end of cooling can be controlled to a minimum, the temperature field of the motor cooling environment is evenly distributed, the motor's ultimate working capacity is maximized, the motor's working efficiency is improved, the motor's insulation life is extended, and the motor vibration noise is lower when the compressor is running.

[0042] At least two independent cooling channels are evenly spaced around the outer circumference of the motor accommodating chamber 11, so that the cooling efficiency of each area of ​​the motor 12 accommodated in the motor accommodating chamber 11 remains basically consistent, and the cooling channels can be arranged in a spiral, semi-spiral, straight-through and reciprocating manner.

[0043] The shell part of the compressor shell 10 that forms the motor accommodating chamber 11 is a double-wall structure, which includes an outer wall 14 and an inner wall 15. A cooling cavity 16 is formed between the outer wall 14 and the inner wall 15. The inner wall 15 surrounds the motor 20. The air from the compressor intake port enters the cooling cavity 16 while entering the air inlet of at least two independent cooling channels, cooling the outer wall 14 and the inner wall 15, and further taking away the heat from the motor 20. Thus, through the dual cooling functions of at least two independent cooling channels and the cooling cavity, the heat dissipation area is increased, and the cooling efficiency of the motor 20 is further improved. In addition, the double-wall structure lengthens the transmission path of the vibration and noise emitted from the motor, which has the technical effect of reducing vibration and noise.

[0044] like Figure 4-6As shown, the at least two independent cooling channels may include a first cooling channel 12 and a second cooling channel 13, the first cooling channel 12 and the second cooling channel 13 are located on the inner surface of the inner wall 15, the first and second cooling channels 12 and 13 may be configured as channels formed by grooves on the inner surface of the inner wall 15, or the first and second cooling channels 12 and 13 may also be pipes embedded in the inner surface of the inner wall 15. Of course, more than two cooling channels may be arranged as needed.

[0045] In order to avoid insufficient double-wall strength of the compressor housing 10 , reinforcing ribs are provided along the circumferential direction on at least one of the inner surface of the outer wall 14 and the outer surface of the inner wall 15 . The reinforcing ribs may be sheet-like pieces and may be arranged in multiple rows.

[0046] When the heat generated by the motor 20 is relatively large, the cooling cavity 16 may be through-hole, and the air inlet of the cooling cavity 16 is connected to the air intake of the compressor, allowing air from the air intake of the compressor to pass through it and be discharged from the exhaust port of the cooling cavity 16. Since the cooling cavity 16 increases the heat exchange area, the heat exchange efficiency of the motor 20 is improved.

[0047] When the heat generated by the motor 20 is relatively small, the air inlet of the cooling cavity 16 is connected to the air intake of the compressor, and the air outlet of the cooling cavity 16 is closed, so that the cooling cavity 16 plays a role in isolating vibration and absorbing noise. The cooling cavity 16 is divided into at least two silencing cavities of different volumes, and the multiple silencing cavities of different volumes can absorb noises of different frequencies entering therein, so that the silencing efficiency is better.

[0048] The compressor includes a compressor suction port, allowing external air to enter the interior of the compressor housing, and the at least two fluid passages are in fluid communication with the compressor suction port, so that air from the compressor suction port enters the at least two fluid passages synchronously.

[0049] The compressor air intake is in fluid communication with the cooling cavity 16 , so that air enters the cooling cavity 16 simultaneously with the at least two fluid channels, thereby achieving a double cooling effect on the motor 21 .

[0050] The compressor may be configured as a semi-hermetic screw compressor, or other type of compressor in which the motor is integrated as part of the compressor within the compressor housing.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present application can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A compressor housing (10), comprising: A motor accommodating chamber (11), used for accommodating a motor; At least two independent cooling channels (12, 13) are arranged around the outer periphery of the motor accommodating chamber (11) and are arranged in sequence along the axial direction of the motor.

2. The compressor housing (10) according to claim 1, wherein the housing portion of the compressor housing (10) that forms the motor accommodating chamber (11) is constructed as a double-wall structure, including an outer wall (14) and an inner wall (15), and a cooling cavity (16) is formed between the outer wall (14) and the inner wall (15).

3. The compressor housing (10) according to claim 1, wherein the at least two independent cooling channels (12, 13) are located on the inner surface of the inner wall (15).

4. The compressor housing (10) according to claim 3, wherein the at least two independent cooling channels (12, 13) are configured as channels formed by grooves on the inner surface.

5. The compressor housing (10) according to claim 3, wherein the at least two independent cooling channels (12, 13) are configured as pipes embedded in the inner surface.

6. The compressor housing (10) according to claim 2, wherein reinforcing ribs are provided on both the inner surface of the outer wall (14) and the outer surface of the inner wall (15) along the circumferential direction.

7. The compressor housing (10) according to claim 2, wherein the cooling cavity (16) is through-going for the passage of a cooling medium.

8. The compressor housing (10) according to claim 2, wherein the cooling cavity (16) comprises at least two silencer cavities with different volumes for absorbing noise entering therein.

9. The compressor housing (10) according to claim 2, wherein the cooling cavity (16) is configured as a sound-absorbing structure, an air inlet of the cooling cavity (16) is connected to the outside, and an air outlet of the cooling cavity (16) is closed.

10. The compressor housing (10) according to claim 2, wherein respective air inlets and respective air outlets of at least two independent cooling channels (12, 13) are independent of each other.

11. The compressor housing (10) according to claim 2, wherein at least two independent cooling channels (12, 13) are evenly spaced and arranged around the periphery of the motor accommodating chamber (11).

12. A compressor, comprising a compressor housing (10) and a motor (20) according to any one of claims 1 to 11, wherein the motor (20) is located in the motor accommodating chamber (11).

13. The compressor according to claim 12, comprising a compressor suction port for external air to enter the interior of the compressor housing, the at least two fluid passages (12, 13) being in fluid communication with the compressor suction port.

14. The compressor of claim 12, wherein the compressor suction port is in fluid communication with the cooling cavity (16).

15. The compressor of claim 12, comprising a semi-hermetic screw compressor.

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