Screw compressors and air conditioning units

Abstract

This application provides a screw compressor and an air conditioning unit. The screw compressor includes a housing and a male rotor and a female rotor disposed within the housing. The male and female rotors are arranged vertically and are located in the vertical direction of the housing's center of gravity. In this invention, because the male and female rotors are arranged vertically and located in the vertical direction of the housing's center of gravity, their rotation centers are also located in the vertical direction of the housing's center of gravity. This avoids eccentric vibration caused by the rotation centers of the male and female rotors deviating from the vertical direction of the housing's center of gravity, thereby reducing compressor vibration and ensuring the stability of the compressor during operation.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and more specifically, to a screw compressor and an air conditioning unit. Background Technology

[0002] Screw compressors are a type of positive displacement refrigeration compressor. They utilize a pair of meshing male and female rotors that rotate within the compressor cavity, periodically changing the volume between each pair of tooth slots to complete the intake, compression, and exhaust processes.

[0003] like Figure 1 As shown, the capacity regulating slide valve is a common structure used in screw compressors to regulate volumetric flow rate. A pair of horizontally arranged male and female rotors are arranged on the compressor housing 1. The slide valve 2 is mounted on the compressor housing, becoming part of it, and is located at the intersection of the rotor cavities. The slide valve 2 can move back and forth in a direction parallel to the cylinder axis. When the slide valve 2 moves, a bypass hole 3 is formed on the housing to bypass excess gas. The effective compression length of the rotor shortens, thereby changing the compressor's suction flow rate and achieving the purpose of regulating the compressor load.

[0004] In a semi-hermetic screw compressor, the motor is typically mounted on the male rotor, directly driving it without the need for couplings or other transmission structures, resulting in a simple structure. The female rotor is then driven by the male rotor. Since the male and female rotors are horizontally arranged, the volumetric slide valves are positioned on the intersection line of the rotor cavity holes, either at the top or bottom of the rotor.

[0005] The above structure has the following problems: Because the female and male rotors of the screw compressor are arranged horizontally, the slide valve can only be placed at the top or bottom of the rotors. Since the motor directly drives the male rotor, and the center of rotation of the male rotor is at the center of the male rotor, when the slide valve is placed at the top or bottom of the rotor, the large weight of the motor and the male rotor will cause the compressor's center of gravity to deviate from the center of rotation of the male rotor. In particular, when the slide valve is placed at the bottom of the female or male rotor, the compressor's center of rotation and center of gravity will be raised, further leading to compressor vibration caused by eccentric motion.

[0006] This will exacerbate the instability and vibration during compressor operation. Summary of the Invention

[0007] This invention provides a screw compressor and an air conditioning unit to solve the technical problems of instability and vibration during compressor operation caused by eccentric motion in existing screw compressors.

[0008] This application provides a screw compressor, including a housing and a male rotor and a female rotor disposed within the housing. The male rotor and the female rotor are arranged in a vertical direction and are located in the vertical direction where the center of gravity of the housing is located.

[0009] In one embodiment, the male rotor is located below the female rotor.

[0010] In one embodiment, the male rotor is located above the female rotor.

[0011] In one embodiment, the screw compressor includes an electric motor that is driven connected to a male rotor.

[0012] In one embodiment, the screw compressor includes a slide valve disposed at the male rotor and the female rotor.

[0013] In one embodiment, the slide valve is located on the left or right side of the male rotor and the female rotor.

[0014] In one embodiment, the screw compressor is a semi-hermetic screw compressor.

[0015] This application also provides an air conditioning unit, including a screw compressor, wherein the screw compressor is the screw compressor described above.

[0016] In the above embodiments, since the male and female rotors are arranged vertically and located in the vertical direction of the center of gravity of the housing, the rotation centers of the male and female rotors are also located in the vertical direction of the center of gravity of the housing. This avoids eccentric vibration caused by the deviation of the rotation centers of the male and female rotors from the vertical direction of the center of gravity of the housing, thereby reducing the vibration of the compressor and ensuring the stability of the compressor during operation. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 This is a structural diagram of a capacity regulating slide valve based on existing technology;

[0019] Figure 2 This is a structural diagram of a compressor based on existing technology;

[0020] Figure 3 This is a structural diagram based on another compressor in the prior art;

[0021] Figure 4 This is a schematic diagram of an embodiment of the compressor according to the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0023] Further research was conducted on compressors with horizontally arranged rotors in existing technologies, such as... Figure 2 As shown, when the slide valve 2 is at the top of the male rotor 4 and the female rotor 5, this arrangement causes the compressor's center of gravity to be positioned slightly above the rotor centerline, at the center of the male rotor 4 and the female rotor 5, deviating from the rotation center of the male rotor 4. Figure 3 As shown in the figure, when the slide valve 2 is located at the bottom of the male rotor 4 and the female rotor 5, this arrangement is very obvious. Since the slide valve 2 is at the bottom of the compressor, and since the diameter of the slide valve 2 cannot be made very small, it is generally about equal to the rotor radius. This will cause the diameter of the slide valve 2 to occupy part of the bottom space. The horizontal center of the male rotor 4 and the female rotor 5 will be raised by the distance of the diameter of the slide valve 2. Since the horizontal center of the male rotor 4 is raised, the motor connected to the male rotor 4 will also be raised. The entire shaft system of the male rotor 4 of the compressor will be raised. The housing 1 on which the rotor is installed and the housing 1 on which the motor is installed will also be raised. The final effect is that the center of gravity of the compressor is raised. The higher the center of gravity, the less stable the compressor runs. In addition, since the rotation center of the compressor is also raised, the rotation and instability of the compressor will also increase. The compressor is prone to excessive vibration during operation.

[0024] To solve the above-mentioned technical problems, in the technical solution of the present invention, as follows: Figure 4 As shown, an embodiment of a screw compressor is provided, which includes a housing 10 and a male rotor 20 and a female rotor 30 disposed within the housing 10. The male rotor 20 and the female rotor 30 are arranged in a vertical direction and are located in the vertical direction where the center of gravity of the housing 10 is located.

[0025] In the technical solution of this invention, since the male rotor 20 and the female rotor 30 are arranged vertically and located in the vertical direction of the center of gravity of the housing 10, the rotation centers of the male rotor 20 and the female rotor 30 are also located in the vertical direction of the center of gravity of the housing 10. This avoids eccentric vibration caused by the deviation of the rotation centers of the male rotor 20 and the female rotor 30 from the vertical direction of the center of gravity of the housing 10, thereby reducing the vibration of the compressor and ensuring the stability of the compressor during operation.

[0026] like Figure 4As shown, more preferably, in this embodiment, the male rotor 20 is located below the female rotor 30. Alternatively, the male rotor 20 may be located above the female rotor 30.

[0027] Optionally, in this embodiment, the screw compressor includes a motor, which is driven and connected to the male rotor 20. Furthermore, since the male rotor 20 is located below the female rotor 30, the center of the male rotor 20 can be positioned very low, and the motor connected to the male rotor 20 can also be positioned very low. The entire male rotor shaft system of the compressor will be positioned very low, and the center of gravity of the compressor can be lowered significantly, thereby improving the vibration problem during compressor operation.

[0028] More preferably, in the technical solution of this embodiment, the screw compressor includes a slide valve 40, which is disposed at the male rotor 20 and the female rotor 30. Furthermore, since the male rotor 20 and the female rotor 30 are symmetrically arranged, the center of gravity of the compressor is on the center line of the male rotor 20 and the female rotor 30. Even with the slide valve 40, the center of gravity of the screw compressor is close to the rotation center of the male rotor.

[0029] As an optional implementation method, such as Figure 4 As shown, the slide valve 40 is located on the left side of the male rotor 20 and the female rotor 30. As an alternative embodiment not shown in the figure, the slide valve 40 may also be located on the right side of the male rotor 20 and the female rotor 30.

[0030] It should be noted that the technical solution of the present invention is particularly applicable to semi-hermetic screw compressors.

[0031] The compressor technology of this invention changes the conventional horizontal arrangement of male and female rotors. Instead, the male rotor 20 and female rotor 30 are arranged vertically, with the female rotor 30 positioned above the male rotor 40. The slide valve 40 is located on the side of the male and female rotors. The center of gravity of the compressor is close to the rotation center of the male rotor 20. Because the slide valve 40 is located on the side of the rotor, it does not raise the center of the male rotor 20 and female rotor 30, thus lowering the center of gravity of the compressor. The lower the center of gravity of the compressor, the closer it is to the rotation center of the compressor, resulting in less and more stable vibration of the compressor. This solves the technical problem of large vibration during the operation of current screw compressors.

[0032] The present invention also provides an air conditioning unit, including the aforementioned screw compressor. Using the aforementioned screw compressor allows the air conditioning unit to operate with lower noise and more stable performance.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A screw compressor, comprising a housing (10) and a male rotor (20) and a female rotor (30) disposed within the housing (10), characterized in that, The male rotor (20) and the female rotor (30) are arranged in a vertical direction, and the rotation centers of the male rotor (20) and the female rotor (30) are located in the vertical direction where the center of gravity of the housing (10) is located.

2. The screw compressor according to claim 1, characterized in that, The male rotor (20) is located below the female rotor (30).

3. The screw compressor according to claim 1, characterized in that, The male rotor (20) is located above the female rotor (30).

4. The screw compressor according to claim 1, characterized in that, The screw compressor includes a motor, which is drivenly connected to the male rotor (20).

5. The screw compressor according to claim 1, characterized in that, The screw compressor includes a slide valve (40) disposed at the male rotor (20) and the female rotor (30).

6. The screw compressor according to claim 5, characterized in that, The slide valve (40) is located on the left or right side of the male rotor (20) and the female rotor (30).

7. The screw compressor according to any one of claims 1 to 6, characterized in that, The screw compressor is a semi-hermetic screw compressor.

8. An air conditioning unit, comprising a screw compressor, characterized in that, The screw compressor is the screw compressor according to any one of claims 1 to 7.

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