turbo refrigerator

Abstract

The invention provides a turbine refrigerator. Gas used for the driving of a discharger is supplied to the discharger, and then the volume of refrigerant gas flowing to the low-pressure side of refrigerating cycle is reduced, thereby preventing the compression power from being excessively consumed. Moreover, the turbine refrigerator is not affected by the temperature condition of cooling water, and can guarantee the oil-recycling function of the discharger, so as to keep the stable operation of the refrigerator. The turbine refrigerator is provided with the discharger (20) which enables the refrigerant gas to serve as driving gas so as to absorb refrigerant, staying in an evaporator and containing oil, and recycle and store the refrigerant in an oil cylinder of a turbine compressor (1). The turbine refrigerator is also provided with a refrigerant supply distribution pipe (5BP) which supplies the refrigerant to the discharger (20) from an energy saver (4). The refrigerant gas, which is supplied to a multiple-compression-stage central part of the turbine compressor (1) from the energy saver (4), serves as the driving gas.

Description

technical field [0001] The present invention relates to a turbo refrigerator, and more particularly, to a turbo refrigerator in which oil-containing refrigerant remaining in an evaporator is recovered to an oil cylinder by an ejector using refrigerant gas as a driving gas. Background technique [0002] Conventionally, turbo refrigerators used in refrigerating and air-conditioning equipment and the like are constituted by a closed system in which a refrigerant is sealed, and are configured as an evaporator that absorbs heat from cold water (fluid to be cooled) to evaporate the refrigerant to exert a cooling effect, A compressor that compresses the refrigerant gas evaporated by the evaporator to become a high-pressure refrigerant gas, a condenser that cools the high-pressure refrigerant gas with cooling water (cooling fluid) to condense it, and The expansion valve (expansion mechanism) that depressurizes the refrigerant and expands it is connected through refrigerant piping. ...

AI Technical Summary

Problems solved by technology

However, for refrigerants with a large pressure difference, such as R134a, the excess refrigerant gas is diverted to the low-pressure side of the refrigeration cycle due to the pressure difference, and the compression power is excessively consumed, which may lead to a decrease in the efficiency of the refrigerator. question

[0008] In addition, the driving pressure of the displacer is determined by the cooling water temperature condition, which is the primary condition of the refrigerator, so there are cases where the displacer cannot operate at the performance peak point, and the oil recovery function of the displacer cannot be effectively utilized

Therefore, there is a problem that the oil cannot be fully recovered to the oil cylinder, resulting in the reduction of the oil held in the oil cylinder and the failure to supply oil to the bearing and speed increaser, so that the turbo refrigerator cannot continue to operate.

Images