Air conditioning system

Abstract

The invention relates to an air-conditioning system, comprising: a phase separator for separating a gas-phase refrigerant and a liquid-phase refrigerant; an evaporator for evaporating the liquid-phase refrigerant separated by the phase separator; a compressing part for compressing the refrigerant passing through the evaporator and comprising a constant speed compressor and a capacity variable compressor; a gas-phase refrigerant supply passage for supplying the gas-phase refrigerant discharged from the phase separator to the constant speed compressor and the capacity variable compressor; a serial / parallel converting unit provided for connecting the constant speed compressor and the capacity variable compressor in series or in parallel. Thereby, at a normal heating zone, in a state that theconstant speed compressor and the capacity variable compressor are connected in parallel, the load is operated partially or least; while at the heating low temperature zone, the constant speed compressor and the capacity variable compressor are connected in series, the gas-phase refrigerant is supplied between the constant speed compressor and the capacity variable compressor, thus, the air-conditioning system has the advantage of maximizing the heat supply capability according to the outside air temperature.

Description

technical field [0001] The present invention relates to an air-conditioning system, and particularly relates to utilizing a compression section composed of a fixed-speed compressor and a variable-capacity compressor to allow the gas-phase refrigerant separated by a phase separator to flow in, and the variable-capacity compressor of the fixed-speed compressor can be converted into Connected in series / parallel, it is possible to improve the heating efficiency of an air-conditioning system in particular when providing low-temperature heating. Background technique [0002] Generally speaking, an air conditioning system is a device that uses a compressor, a condenser, an expander, and an evaporator to cool and heat a room. It is divided into a refrigeration system that circulates a refrigerant in only one direction to supply cold air to the room, And a cooling and heating system (Heat pump) that selectively operates the refrigerant cycle in both directions to supply cooling or he...

AI Technical Summary

Problems solved by technology

That is, when the load is small, if the first compression device and the second compression device are driven by one drive device, the power consumption will increase, and if the first compression device and the second compression device connected to one drive device are not If any one of them is selectively driven, the internal structure of the two-stage compressor will become complicated

[0007] In addition, as mentioned above, the most important factor for maximizing the gas injection effect is the volume ratio of the two-stage compressors. In the case of using one compressor, the volume ratio is fixed due to mechanical limitations, and In the end, the disadvantage of not being able to correspond to various loads

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