Water chilling unit applying natural cooling technology

Abstract

The present invention provides a cold water unit applying technology of natural cooling and relates to the technical field of refrigeration. In order to improve the operation efficiency of the existing unit adopting proposal of a dry cooling machine and save the operation cost, the present invention provides a cold water unit applying technology of the natural cooling, which comprises an additionally arranged heat exchanging loop. A heat exchanger used for the heat exchanging between cooling medium and secondary refrigerant is in series connected inside a chamber of a cooling loop of a dry cooling device. The heat exchanging loop is controlled by a tee automatic adjusting valve. When the temperature of the cooling medium is less that of the secondary refrigerant, a valve is opened and the secondary refrigerant is directly cooled by the cooling medium. The present invention has more natural cooling quantity when the outdoor temperature is less. When the outdoor temperature is less enough, all the refrigeration needs can be undertaken by the temperature of the cooling medium. The present invention has the characteristics of high reliability of the operation, simple assembling and easy maintenance, and the comprehensive efficiency and integrated cost is even better than that of the air-cooling direct evaporation type unit.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a small and medium-sized chiller with a main engine installed indoors. Background technique [0002] For small and medium-sized chillers that require the main unit to be installed indoors, the refrigerant direct evaporative unit with an air-cooled condenser is undoubtedly the most efficient and easiest way to install, so the cost of this solution is also the lowest; when the outdoor unit and indoor When the distance between the units is too large, due to the long-distance transportation of the refrigerant, the pressure loss and the return flow of the refrigerated oil, it is not suitable to adopt the above scheme. At this time, the scheme of dry cooler is often used. The water is pumped to the outdoor unit (dry cooler) to exchange heat with the outdoor air for cooling. However, there is still such a problem in the solution of the dry cooler: although it solves the problem t...

AI Technical Summary

Problems solved by technology

However, there is still such a problem in the solution of the dry cooler: although it solves the problem that the distance between the indoor and outdoor units is too large, in terms of the efficiency and cost of the unit, due to the addition of a heat exchanger and the increased power consumption of the water pump, the unit The efficiency is relatively low and the cost is relatively high

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