Compressors and air conditioning units

Abstract

The present application provides a compressor and an air conditioning unit. The compressor includes an exhaust chamber and a plurality of exhaust pipes connected to the exhaust chamber, and two adjacent exhaust pipes are connected through a resonance attenuation chamber. By applying the technical solution of the present invention, a resonance attenuation chamber is arranged between two adjacent exhaust pipes. When the airflow in the exhaust pipe passes through the resonance attenuation chamber, according to the principle of the Helmholtz resonator, when the frequency of the airflow pulsation is consistent with the resonance frequency of the resonance attenuation chamber, the resonance attenuation chamber will resonate, thereby consuming the energy of the exhaust airflow pulsation, achieving the effect of consuming the airflow pulsation, and reducing the vibration and noise of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a compressor and an air-conditioning unit. Background Art

[0002] The screw compressor is a positive displacement refrigeration compressor. It uses a pair of intermeshing female and male rotors to rotate in the body cavity, periodically changing the volume between each pair of rotor teeth to complete the suction, compression, and exhaust processes. When the compressed gas is connected to the exhaust port, the exhaust is carried out. Since the male rotor is composed of n teeth, the number of teeth is commonly 5 or 6. When the male rotor rotates one circle, it completes the exhaust n times. The intermittent exhaust of the screw compressor forms the exhaust airflow pulsation. The compressor airflow pulsation will cause the compressor body to vibrate and increase the noise.

[0003] like Figure 1 and Figure 2 As shown, there are two main solutions to solve the pulsation of the exhaust gas flow of the compressor. The compressor includes an exhaust chamber 1 and an exhaust pipe 2 connected to the exhaust chamber 1. Figure 1 In the solution, a muffler 3 is added to the exhaust pipe 2 to reduce noise. Figure 2 In the solution, the compressor flow rate is reduced by setting a double exhaust pipe 2, thereby reducing noise.

[0004] However, the first solution mentioned above cannot reduce the generation of noise; and although the second solution can reduce the generation of noise, the actual effect of reducing noise is relatively limited. Summary of the invention

[0005] The embodiments of the present invention provide a compressor and an air conditioning unit to solve the technical problem that the noise elimination capability of the compressor in the prior art is relatively limited.

[0006] An embodiment of the present application provides a compressor, including an exhaust chamber and a plurality of exhaust pipes connected to the exhaust chamber, wherein two adjacent exhaust pipes are connected via a resonance attenuation chamber.

[0007] In one embodiment, the resonance attenuation cavity includes a first resonance attenuation cavity and a second resonance attenuation cavity, and two adjacent exhaust pipes are connected through the first resonance attenuation cavity and the second resonance attenuation cavity respectively, and the resonance frequency of the second resonance attenuation cavity is greater than the resonance frequency of the first resonance attenuation cavity.

[0008] In one embodiment, two adjacent exhaust pipes are further connected via a third resonance attenuation cavity, and the resonance frequency of the third resonance attenuation cavity is greater than the resonance frequency of the second resonance attenuation cavity.

[0009] In one embodiment, the resonance attenuation cavity includes a cavity body and a neck connected to the cavity body, and the cavity body is connected to the exhaust pipe through the neck.

[0010] In one embodiment, the first resonance attenuation cavity includes a first cavity and a first neck connected to the first cavity, and the first cavity is connected to the exhaust pipe through the first neck;

[0011] The second resonance attenuation cavity comprises a second cavity and a second neck connected to the second cavity, and the second cavity is connected to the exhaust pipe through the second neck.

[0012] In one embodiment, the third resonance attenuation cavity includes a third cavity and a third neck connected to the third cavity, and the third cavity is connected to the exhaust pipe through the third neck.

[0013] In one embodiment, the second resonance attenuation cavity is arranged in parallel with the first resonance attenuation cavity.

[0014] In one embodiment, the third resonance attenuation cavity, the second resonance attenuation cavity and the first resonance attenuation cavity are arranged in parallel.

[0015] In one embodiment, there are two exhaust pipes, which are arranged side by side.

[0016] The present application also provides an air-conditioning unit, comprising a compressor, which is the above-mentioned compressor.

[0017] In the above embodiment, a resonance attenuation cavity is arranged between two adjacent exhaust pipes. When the airflow in the exhaust pipe passes through the resonance attenuation cavity, according to the principle of the Helmholtz resonator, when the frequency of the airflow pulsation is consistent with the resonance frequency of the resonance attenuation cavity, the resonance attenuation cavity will resonate, thereby consuming the energy of the exhaust airflow pulsation, achieving the effect of consuming the airflow pulsation and reducing the vibration and noise of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a partial structural schematic diagram of a compressor according to the prior art;

[0020] Figure 2 is a partial structural schematic diagram of another compressor according to the prior art;

[0021] Figure 3 is a partial structural schematic diagram of an embodiment of a compressor according to the present invention;

[0022] Figure 4 yes Figure 3 Schematic diagram of the over-resonance attenuation cavity of a compressor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0024] In order to solve the technical problem that the noise elimination ability of the compressor in the prior art is relatively limited, such as Figure 3 As shown, an embodiment of the compressor of the present invention comprises an exhaust chamber 10 and a plurality of exhaust pipes 20 connected to the exhaust chamber 10 , and two adjacent exhaust pipes 20 are connected via a resonance attenuation chamber 30 .

[0025] By applying the technical solution of the present invention, a resonance attenuation cavity 30 is arranged between two adjacent exhaust pipes 20. When the airflow in the exhaust pipe 20 passes through the resonance attenuation cavity 30, according to the principle of the Helmholtz resonator, when the frequency of the airflow pulsation is consistent with the resonance frequency of the resonance attenuation cavity 30, the resonance attenuation cavity 30 will resonate, thereby consuming the energy of the exhaust airflow pulsation, achieving the effect of consuming the airflow pulsation and reducing the vibration and noise of the compressor.

[0026] Optionally, in the technical solution of this embodiment, there are two exhaust pipes 20, and the two exhaust pipes 20 are arranged side by side. As another optional implementation, there may be more exhaust pipes 20, and the effect of eliminating airflow pulsation can be achieved by simply connecting two adjacent exhaust pipes 20 through the resonance attenuation cavity 30.

[0027] During the actual operation of the compressor, when the airflow on the exhaust pipe 20 passes through the attenuation cavity, different airflow resonant vibration frequencies will be generated. Therefore, as a preferred embodiment, the resonance attenuation cavity 30 includes a first resonance attenuation cavity 30a and a second resonance attenuation cavity 30b. The two adjacent exhaust pipes 20 are connected through the first resonance attenuation cavity 30a and the second resonance attenuation cavity 30b, respectively. The resonance frequency of the second resonance attenuation cavity 30b is greater than the resonance frequency of the first resonance attenuation cavity 30a. In this way, the technical solution of the present invention can absorb the energy of the exhaust airflow pulsation for two exhaust airflow pulsation frequencies.

[0028] As a more preferred embodiment, two adjacent exhaust pipes 20 are also connected via a third resonance attenuation cavity 30c, and the resonance frequency of the third resonance attenuation cavity 30c is greater than the resonance frequency of the second resonance attenuation cavity 30b. In this way, the technical solution of the present invention can absorb the energy of exhaust gas flow pulsation for three exhaust gas flow pulsation frequencies.

[0029] In the past, the frequency region of the exhaust airflow pulsation of the compressor was generally divided into a low frequency region of 20 Hz-500 Hz, a medium frequency region of 500 Hz-2000 Hz, and a high frequency region of 2000 Hz-10000 Hz. Therefore, based on the principle of the Helmholtz resonator, a first resonance attenuation cavity 30a, a second resonance attenuation cavity 30b, and a third resonance attenuation cavity 30c are set for the above three frequency regions, and each attenuation cavity corresponds to a different resonance frequency. By connecting different resonance attenuation cavities in parallel, different resonant vibration frequencies are generated, which correspond to the low frequency region, medium frequency region, and high frequency region of the exhaust pressure pulsation, respectively. Through the resonance of the resonance attenuation cavity, the purpose of eliminating the airflow pulsation on the exhaust pipe 20 is achieved, and the problem of high vibration and noise during the operation of the screw compressor is solved.

[0030] like Figure 4 As shown, optionally, the resonance attenuation cavity 30 includes a cavity 31 and a neck 32 connected to the cavity 31, and the cavity 31 is connected to the exhaust pipe 20 through the neck 32. The diameter of the neck 32 is d, the length of the neck 32 is L, and the volume of the cavity 31 is V. According to the principle of the Helmholtz resonator:

[0031] Where C is a constant;

[0032] When the volume V of the cavity 31 is smaller, the resonance frequency f is larger. On the contrary, when the volume V of the cavity 31 is larger, the resonance frequency f is smaller. Therefore, the airflow pulsation cavities 31 of different volumes are connected in series between the exhaust pipes 20, corresponding to the low frequency area, medium frequency area and high frequency area of ​​the exhaust pressure pulsation respectively. Through the resonance of the cavity 31, the purpose of eliminating the airflow pulsation on the exhaust pipe 20 is achieved, and the problem of vibration and noise during the operation of the screw compressor is solved.

[0033] Optionally, the first resonance attenuation cavity 30a includes a first cavity and a first neck connected to the first cavity, and the first cavity is connected to the exhaust pipe through the first neck; the second resonance attenuation cavity 30b includes a second cavity and a second neck connected to the second cavity, and the second cavity is connected to the exhaust pipe through the second neck; the third resonance attenuation cavity 30c includes a third cavity and a third neck connected to the third cavity, and the third cavity is connected to the exhaust pipe through the third neck. The sizes of the first cavity, the second cavity and the third cavity, as well as the sizes of the first neck, the second neck and the third neck are calculated according to the formula of the principle of the Helmholtz resonator.

[0034] Optionally, in the technical solution of this embodiment, the third resonance attenuation cavity 30c, the second resonance attenuation cavity 30b and the first resonance attenuation cavity 30a are arranged in parallel. As other optional implementations, the third resonance attenuation cavity 30c, the second resonance attenuation cavity 30b and the first resonance attenuation cavity 30a may also be non-parallel to achieve resonance absorption of pulse energy displacement.

[0035] like Figure 3 As shown, in the technical solution of this embodiment, the third resonance attenuation cavity 30c, the second resonance attenuation cavity 30b and the first resonance attenuation cavity 30a are arranged from left to right. It should be noted that the above arrangement order does not constitute a limitation to the present invention, so the arrangement order of the resonance attenuation cavity does not affect the compressor exhaust pulsation noise reduction effect, and can be high frequency → medium frequency → low frequency, or high frequency → medium frequency → high frequency or any other order, and the size of different resonance attenuation cavities can be designed according to the frequency to be attenuated.

[0036] It should also be noted that, in addition to the above-mentioned 1, 2, and 3 resonance attenuation cavities 30, the number of resonance attenuation cavities 30 can also be more, and the number of resonance attenuation cavities 30 can be set as needed.

[0037] The present invention also provides an air conditioning unit, comprising the above compressor. The use noise of the air conditioning unit can be reduced by using the above compressor.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compressor, characterized in that: The invention comprises an exhaust cavity (10) and a plurality of exhaust pipes (20) connected to the exhaust cavity (10); two adjacent exhaust pipes (20) are connected via a resonance attenuation cavity (30); the resonance attenuation cavity (30) comprises a first resonance attenuation cavity (30a) and a second resonance attenuation cavity (30b); the two adjacent exhaust pipes (20) are connected via the first resonance attenuation cavity (30a) and the second resonance attenuation cavity (30b), respectively; the resonance frequency of the second resonance attenuation cavity (30b) is greater than the resonance frequency of the first resonance attenuation cavity (30a); the two adjacent exhaust pipes (20) are also connected via a third resonance attenuation cavity (30c); the resonance frequency of the third resonance attenuation cavity (30c) is greater than the resonance frequency of the second resonance attenuation cavity (30b).

2. The compressor according to claim 1, characterized in that The resonance attenuation cavity (30) comprises a cavity (31) and a neck (32) connected to the cavity (31); the cavity (31) is connected to the exhaust pipe (20) via the neck (32).

3. The compressor according to claim 1, characterized in that The first resonance attenuation cavity (30a) comprises a first cavity body and a first neck body connected to the first cavity body, and the first cavity body is connected to the exhaust pipe (20) via the first neck body; The second resonance attenuation cavity (30b) comprises a second cavity body and a second neck connected to the second cavity body, and the second cavity body is connected to the exhaust pipe (20) via the second neck body.

4. The compressor according to claim 1, characterized in that The third resonance attenuation cavity (30c) comprises a third cavity body and a third neck portion connected to the third cavity body, and the third cavity body is connected to the exhaust pipe (20) via the third neck portion.

5. The compressor according to claim 1, characterized in that The second resonance attenuation cavity (30b) is arranged in parallel with the first resonance attenuation cavity (30a).

6. The compressor according to claim 1, characterized in that The third resonance attenuation cavity (30c), the second resonance attenuation cavity (30b) and the first resonance attenuation cavity (30a) are arranged in parallel.

7. The compressor according to claim 1, characterized in that There are two exhaust pipes (20), and the two exhaust pipes (20) are arranged side by side.

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

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