Evaporation-condensation oilless cold-hot water unit and control method thereof

Abstract

The invention discloses an evaporation-condensation oilless cold-hot water unit and a control method thereof. The evaporation-condensation oilless cold-hot water unit comprises an oilless refrigeration system, a wind-side condensation radiating system, a water-side condensation cooling system, a cold-hot water heat exchange system and a control system, wherein the oilless refrigeration system comprises a magnetic levitation variable-frequency centrifugal compressor, a copper fin heat exchanger, a coiler heat exchanger, an electronic expansion valve and a shell-and-tube heat exchanger. The evaporation-condensation oilless cold-hot water unit disclosed by the invention is an integrated product, wherein efficient energy conservation and wide supply of cold-hot water can be realized, the floor area is greatly saved, the water consumption is reduced, the energy efficiency of the system is high, the equipment is simple, the mounting and using and the operation maintenance are convenient, and the evaporation-condensation oilless cold-hot water unit is particularly suitable for the underground spaces such as subway stations.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an evaporative condensation oil-free cold and hot water unit and a control method thereof. Background technique [0002] The traditional water-cooled chiller combines the cooling source of the water-cooled cold water air-conditioning system with the cooling tower and its pipelines. The cooling tower is used for heat dissipation, and the water pump is used for medium transportation, which has low energy efficiency; the traditional screw and scroll need to be lubricated by oil. The heat exchange effect of the device leads to low energy efficiency; the engine oil affects the length of the internal and external connections at the same time, which leads to restrictions on the placement of the internal and external machines and also affects energy efficiency. The cold source of the air conditioning system composed of the traditional water-cooled chiller unit + cooling tower + ...

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Problems solved by technology

[0004] In view of the above deficiencies in the prior art, the object of the present invention is to provide an evaporative condensation oil-free chiller and hot water unit and its control method, aiming at solving the problem of low energy efficiency of the cold source system of the existing water-cooled chilled water air-conditioning system, complex equipment, no Applicable to urban subway stations, water-deficient areas and other occasions without cooling tower installation conditions for technical problems

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