Method and special water chilling unit for manufacturing chilled water with large temperature difference in stand-alone three-stage compression manner

Abstract

The invention relates to a method and a special water chilling unit for manufacturing chilled water with a large temperature difference in a stand-alone three-stage compression manner. The method is characterized in that a refrigerant loop and a chilled water loop are arranged in an air-conditioning system, wherein the refrigerant loop adopting a stand-alone three-stage compressor is connected with a condenser through a pipeline and is divided into two ways after being condensed by the condenser; one way of the refrigerant loop passes through a high temperature loop throttling device and a high temperature evaporator and then returns to a suction inlet of a high pressure stage section in the compressor, and the other way of the refrigerant loop passes through a low temperature loop throttling device and a low temperature evaporator and then returns to a suction inlet of a low pressure stage section in the compressor; a high temperature chilled water return opening is communicated with a low temperature chilled water supply pipe (8) to form a high temperature chilled water loop; and a low temperature chilled water return opening is communicated with a high temperature chilled water outlet to form a low temperature chilled water loop. Through the adoption of the method and the special water chilling unit, efficient refrigeration circulation with a large compression ratio is realized, the power consumed by the compressor is reduced, and high temperature chilled water and low temperature chilled water are manufactured at the same time; and the special water chilling unit has the characteristics of dual purposes, high efficiency, investment decrease, reduction of occupied area of a computer room, and the like.

Description

technical field [0001] The invention relates to a single-unit three-stage compression method for producing frozen water with a large temperature difference and a special chiller, which is especially suitable for an air conditioner with independent temperature and humidity control. It belongs to the technical field of heating, ventilating and air conditioning. Background technique [0002] At present, as the country has higher and higher requirements for building energy saving, the energy saving of air conditioning energy consumption in building energy consumption has become an increasingly important part of building energy saving. The main energy-consuming equipment in the air-conditioning system includes chillers and chilled water pumps. The former consumes the electric power of the compressor to provide cooling capacity for the building, and the latter consumes the electric power for delivering chilled water with a certain temperature difference to the building rooms. In ...

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Problems solved by technology

[0004] The first purpose of the present invention is to provide a single-unit two-stage compression system for producing chilled water with a large temperature difference in order to overcome the problems of the existing refrigeration units that reduce the cooling efficiency of the refrigeration unit when producing chilled water with a large temperature difference. Methods

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