CN-122014607-A - Screw compressor and refrigerating system

Abstract

The application provides a screw compressor and a refrigeration system with the screw compressor. The pressure pulsation in the economizer pipeline is mainly generated by a large pressure difference between refrigerant gas in the compression containing cavity and refrigerant gas in the economizer pipeline, the distance between the second silencing reaction cavity and the first silencing reaction cavity is controlled, and different silencer reaction cavity sizes are designed according to the operation working condition of the compressor, so that the pressure pulsation transmitted from the compression cavity of the compressor can realize good pressure pulsation attenuation in a first-order target frequency range and a second-order target frequency range of the concerned rotating speed after passing through the first silencing reaction cavity and the second silencing reaction cavity, and the effective pulsation attenuation frequency range is widened to a great extent, so that the pressure pulsation generated by the compressor under different frequency working conditions is adapted.

Inventors

• YANG DONGSHENG
• SHI YULING
• LI HONGYI
• WANG JIN

Assignees

• 开利公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (8)

1. 1. A screw compressor, comprising: a compressor housing having a compression chamber therein; An economizer in communication with the compressor housing through an economizer line; the first silencing reaction cavity is arranged in the compressor shell and is provided with an economizer compression cavity port communicated with the compression cavity; One end of the economizer pipeline is communicated with the first silencing reaction cavity, the other end of the economizer pipeline is communicated with the economizer, It is characterized in that the utility model also comprises, The second silencing reaction cavity is communicated with the economizer pipeline and is arranged around and protruding out of the outer wall of the economizer pipeline.
2. 2. The screw compressor of claim 1 wherein the diameter D2 of said second muffling reaction chamber is at least greater than the conduit diameter D1 of the portion of said economizer conduit that communicates with said first muffling reaction chamber.
3. 3. The screw compressor according to claim 2 wherein, The distance d between the second silencing reaction cavity and the first silencing reaction cavity is more than or equal to 10mm.
4. 4. The screw compressor according to claim 2 wherein, The height H of the second silencing reaction cavity in the path direction of the economizer tube meets the following numerical conditions, H-D1≥5mm。
5. 5. The screw compressor according to claim 2 wherein, The length L of the second silencing reaction cavity in the extending direction of the economizer pipeline meets the following numerical conditions, L≥10mm。
6. 6. The screw compressor of claim 2, further comprising, The orifice plate is arranged at the communication position of the second silencing reaction cavity and the economizer pipeline.
7. 7. The screw compressor of claim 6, further comprising, And the sound absorbing material is filled in the second silencing reaction cavity.
8. 8. A refrigeration system comprising a screw compressor according to any one of claims 1-2.

Description

Screw compressor and refrigerating system Technical Field The application relates to the technical field of refrigeration/cooling equipment, in particular to a screw compressor and a refrigeration system with the screw compressor. Background Screw compressors typically use an economizer to increase the capacity and COP of the air conditioning unit, but the propagation of pulsations from the economizer ports often affects the operation of the screw compressor and induces pipe vibration to produce noise. The prior art typically provides a dampening chamber at the economizer port where the economizer line is connected to the compression chambers to reduce pressure pulsations transmitted to and downstream of the economizer line, with the chamber typically designed to have some frequency selectivity. During design, the rotation speed of the compressor is considered to be combined with the structural parameters of the compressor, and the design of the cavity is carried out aiming at the predicted main frequency band of the operation of the compressor. When such compressors are applied to high temperature and high pressure designs such as heat pumps, the pressure pulsations will be somewhat enhanced, and it is often desirable to design cavities with better muffling properties, such as higher pressure pulsation transfer losses, a wider effective operating frequency range, etc. Therefore, how to effectively reduce the pressure pulsation from the economizer line without making large design changes is a problem to be solved. Disclosure of Invention The present application aims to provide a screw compressor which at least solves or alleviates some of the problems of the prior art. The application provides a screw compressor, which comprises a compressor shell internally provided with a compression cavity, an economizer communicated with the compressor shell through an economizer pipeline, a first silencing reaction cavity arranged in the compressor shell and provided with an economizer compression cavity port communicated with the compression cavity, and a second silencing reaction cavity which is communicated with the economizer pipeline, surrounds and protrudes out of the outer wall of the economizer pipeline, wherein one end of the economizer pipeline is communicated with the first silencing reaction cavity, and the other end of the economizer pipeline is communicated with the economizer. In an alternative solution, the diameter D2 of the second muffling reaction chamber is at least larger than the diameter D1 of the conduit at the communicating end portion of the economizer conduit and the first muffling reaction chamber. In the alternative technical scheme, the distance d between the second silencing reaction cavity and the first silencing reaction cavity is more than or equal to 10mm. In the alternative technical scheme, the height H of the second silencing reaction cavity in the direction of the path of the economizer tube meets the condition that the numerical value H-D1 is more than or equal to 5mm. In the alternative technical scheme, the length L of the second silencing reaction cavity in the extending direction of the economizer pipeline meets the condition that the length L is more than or equal to 10mm. In an alternative technical scheme, the screw compressor further comprises a pore plate arranged at the communication position of the second silencing reaction cavity and the economizer pipeline. In an alternative embodiment, the screw compressor further comprises a sound absorbing material filled in the second sound-damping reaction chamber. The application also provides a refrigerating system, which is provided with any screw compressor provided by the application. Drawings Fig. 1 is a schematic view showing a structure of a refrigeration system having a screw compressor according to an embodiment of the present application. Fig. 2 is a schematic view showing a partial structure of a screw compressor according to an embodiment of the present application. Fig. 3 is an enlarged partial schematic view of a screw compressor provided in one embodiment of the present application. Fig. 4 is a graph comparing calculated transmission loss of a screw compressor designed sound-deadening chamber according to an embodiment of the present application with a transmission loss curve calculated by using only a first sound-deadening reaction chamber conventionally. Fig. 5 is a schematic view of an economizer line provided in a second embodiment of the present application. Fig. 6 is a schematic view of an economizer line provided in a third embodiment of the present application. Fig. 7 is a schematic view showing a specific structure of an orifice plate used in an economizer line provided in a third embodiment of the present application. Fig. 8 is a schematic view of an economizer line provided in a fourth embodiment of the present application. Reference numerals are a screw compressor 1, a compressor housing 101, a first