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EP-4741660-A1 - SCREW COMPRESSOR, REFRIGERATION SYSTEM

EP4741660A1EP 4741660 A1EP4741660 A1EP 4741660A1EP-4741660-A1

Abstract

A screw compressor (1), comprising: a compressor housing (101) provided with a compression chamber inside; an economizer (202) communicating with the compressor housing (101) through an economizer pipeline (103); and a first muffler reaction chamber (102) disposed in the compressor housing (101) and having an economizer compression chamber port (1021) communicating with the compression chamber, wherein the economizer pipeline (103) has one end communicating with the first muffler reaction chamber (102) and the other end communicating with the economizer (202), and the screw compressor (1) further comprises a second muffler reaction chamber (104) communicating with the economizer pipeline (103), and surrounding and protruding from an outer wall of the economizer pipeline (103).

Inventors

  • YANG, DONGSHENG
  • SHI, Yuling
  • LI, HONGYI
  • WANG, JIN

Assignees

  • Carrier Corporation

Dates

Publication Date
20260513
Application Date
20251110

Claims (8)

  1. A screw compressor (1), comprising: a compressor housing (101) provided with a compression chamber inside; an economizer (202) communicating with the compressor housing (101) through an economizer pipeline (103); and a first muffler reaction chamber (102) disposed in the compressor housing (101) and having an economizer compression chamber port (1021) communicating with the compression chamber, wherein the economizer pipeline (103) has one end communicating with the first muffler reaction chamber (102) and the other end communicating with the economizer (202), and the screw compressor (1) further comprises a second muffler reaction chamber (104) communicating with the economizer pipeline (103), and surrounding and protruding from an outer wall of the economizer pipeline (103).
  2. The screw compressor (1) according to claim 1, wherein a diameter, D2, of the second muffler reaction chamber (104) is at least larger than a pipeline diameter, D1, of a communication portion between the economizer pipeline (103) and the first muffler reaction chamber (102).
  3. The screw compressor (1) according to claim 2, wherein a distance, d, between the second muffler reaction chamber (104) and the first muffler reaction chamber (102) is equal to or greater than 10 mm.
  4. The screw compressor (1) according to claim 2 or 3, wherein a height, H, of the second muffler reaction chamber (104) in a radial direction of the economizer pipeline (103) satisfies the following formula condition: H - D 1 ≥ 5 mm .
  5. The screw compressor (1) according to claim 2, 3 or 4, wherein a length, L, of the second muffler reaction chamber (104) in an extension direction of the economizer pipeline (103) satisfies the following formula condition: L ≥ 10 mm .
  6. The screw compressor (1) according to any of claims 2 to 5, further comprising: an orifice plate (1041) disposed at a communication portion between the second muffler reaction chamber (104) and the economizer pipeline (103).
  7. The screw compressor (1) according to claim 6, further comprising: a sound absorbing material (1042) with which the second muffler reaction chamber (104) is filled.
  8. A refrigeration system (2), comprising: a screw compressor (1) according to any preceding claim.

Description

PRIORITY CLAIM This application claims benefit of Chinese Patent Application No. 202411611846.9, filed November 12, 2024, and all the benefits accruing therefrom under 35 U.S.C. §119, the contents of which in their entirety are herein incorporated by reference. BACKGROUND This application relates to the technical field of refrigeration/cooling equipment, and in particular to a screw compressor and a refrigeration system including the screw compressor. A screw compressor usually uses an economizer to improve a capacity and COP of an air conditioning group, but pulsation propagation from an economizer port always affects an operation of the screw compressor and induces pipeline vibration to generate noise. In the related art, at an economizer port where an economizer pipeline is connected to a compression chamber, a muffling chamber is usually provided to reduce pressure pulsation transmitted to the economizer pipeline and downstream of the economizer pipeline. In the design, a compressor speed is considered in combination with compressor structural parameters, and a chamber is designed for a predicted main frequency band where a compressor is operated. When such a compressor is applied to a high-temperature and high-pressure design of a heat pump or the like, pressure pulsation may be enhanced to some extent, and a chamber generally needs to be designed to have better muffling performance, such as higher pressure pulsation transmission loss and a wider effective action frequency range. Therefore, how to effectively reduce pressure pulsation from an economizer pipeline without a large change in design is a problem to be solved. SUMMARY An object of this application is to provide a screw compressor to at least solve or alleviate some problems in the related art. Viewed from a first aspect, there is provided a screw compressor including: a compressor housing provided with a compression chamber inside; an economizer communicating with the compressor housing through an economizer pipeline; and a first muffler reaction chamber disposed in the compressor housing and having an economizer compression chamber port communicating with the compression chamber, in which the economizer pipeline has one end communicating with the first muffler reaction chamber and the other end communicating with the economizer, and the screw compressor further includes a second muffler reaction chamber communicating with the economizer pipeline, and surrounding and protruding from an outer wall of the economizer pipeline. A diameter D2 of the second muffler reaction chamber may be at least larger than a pipeline diameter D1 of a communication portion between the economizer pipeline and the first muffler reaction chamber. A distance d between the second muffler reaction chamber and the first muffler reaction chamber may be equal to or greater than 10 mm. A height H of the second muffler reaction chamber in a radial direction of the economizer pipeline may satisfy a formula condition of H - D1 ≥ 5 mm. A length L of the second muffler reaction chamber in an extension direction of the economizer pipeline may satisfy a formula condition of L ≥ 10 mm. The screw compressor may further include an orifice plate disposed at a communication portion between the second muffler reaction chamber and the economizer pipeline. The screw compressor may further include a sound absorbing material with which the second muffler reaction chamber is filled. Viewed from a second aspect, there is provided a refrigeration system including the screw compressor according to the first aspect. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS Fig. 1 is a schematic diagram of a structure of a refrigeration system including a screw compressor according to one or more embodiments of this application.Fig. 2 is a schematic diagram of a partial structure of the screw compressor according to one or more embodiments of this application.Fig. 3 is a partially enlarged schematic diagram of the screw compressor according to the embodiment of this application.Fig. 4 is a curve comparison diagram of a transmission loss calculated when a muffling chamber is designed in the screw compressor according to one or more embodiments of this application and a transmission loss calculated when only a first muffler reaction chamber in the related art is used.Fig. 5 is a schematic diagram of an economizer pipeline according to a second embodiment of this application.Fig. 6 is a schematic diagram of an economizer pipeline according to a third embodiment of this application.Fig. 7 is a schematic diagram of a specific structure of an orifice plate used in the economizer pipeline according to the third embodiment of this application.Fig. 8 is a schematic diagram of an economizer pipeline according to a fourth embodiment of this application. Reference numerals: screw compressor 1, compressor housing 101, first muffler reaction chamber 102, economizer compression chamber port 1021, economizer pipe