Centrifugal refrigerator

A refrigerator and centrifugal technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as surge, achieve the effects of preventing abnormal vibration, reducing capacity, and avoiding surge

Active Publication Date: 2015-08-26
EBARA REFRIGERATION EQUIP & SYST CO LTD +1
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In addition, when restarting the refrigerator, since the pressure head is generally small at startup, the IGV is gradually opened to control so that no sudden load is applied to the sliding parts such as the bearings and gears of the compressor. When the state of the head is restarted, there is a problem that surge occurs when the IGV keeps the low opening degree.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Centrifugal refrigerator
  • Centrifugal refrigerator
  • Centrifugal refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Hereinafter, embodiments of the centrifugal refrigerator and its control method of the present invention will be described with reference to the drawings. in Figure 1 ~ Figure 5 Here, the same or equivalent components are denoted by the same reference numerals, and repeated descriptions are omitted.

[0034] figure 1 It is a schematic diagram showing an embodiment of the centrifugal refrigerator of the present invention. In the present embodiment, a centrifugal refrigerator of a so-called high-pressure head specification in which the centrifugal refrigerator is a centrifugal refrigerator for a refrigerant and a centrifugal refrigerator for a heat pump will be described. Such as figure 1 As shown, the centrifugal refrigeration mechanism is equipped with: a multi-stage centrifugal compressor TC for compressing refrigerant, a condenser 4 for cooling and condensing the compressed refrigerant gas with cooling water (cooling fluid), and a refrigerant carrier (Cooled fluid) ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention aims to provide a centrifugal refrigerator having high pressure head specification. The centrifugal refrigerator can avoid surge, and the capacity of the refrigerator can be reduced to the load capacity on the equipment side during low pressure head. The centrifugal refrigerator comprises a measuring unit, an economizer steam valve (7) and a control device (20), wherein the measuring unit is used for measuring the pressure difference between a condenser (4) and an evaporator (5); the economizer steam valve (7) is arranged on a flow path (11) and used for opening and closing the flow path (11), and the flow path (11) is used for communicating an economizer (6) with the middle part of multiple compression stages of a multi-stage centrifugal compressor (TC); the control device (20) controls the opening of a guide vane which is used for adjusting the flow of suction facing the multi-stage centrifugal compressor (TC), and controls the lower limit of opening of the guide vane variably on the basis of the relationship between the preset pressure difference of the condenser (4) and the evaporator (5) and the lower limit of opening of the guide vane according to the pressure difference measured by the measuring unit.

Description

Technical field [0001] The present invention relates to a centrifugal refrigerator, and more particularly, to a centrifugal refrigerator with a high-pressure head specification that can avoid surging and ensure an operating area at a low head (head) and at a partial load. Background technique [0002] Conventionally, centrifugal refrigerators used in refrigeration and air-conditioning apparatuses are composed of a closed system in which refrigerant is enclosed, and are composed of an evaporator that takes heat from a fluid to be cooled to evaporate the refrigerant and exerts a cooling effect. A compressor that compresses the refrigerant gas evaporated by the evaporator to make it a high-pressure refrigerant gas, a condenser that cools and condenses the high-pressure refrigerant gas with a cooling fluid, and performs the condensation of the above-mentioned condensed refrigerant. An expansion valve (expansion mechanism) that decompresses and expands is connected by a refrigerant pi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/10F25B49/02F25B41/04F25B41/20
CPCF25B1/10F25B49/022F25B2600/02F25B41/20
Inventor 荒井宪雄能势真弘平田甲介于晓兵
Owner EBARA REFRIGERATION EQUIP & SYST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap