Water chilling unit applying natural cooling technology

A technology that applies nature and chillers. It is applied in applications, household heating, and household heating. It can solve the problems of increased power consumption of water pumps, high cost, and low efficiency of the unit, and achieve comprehensive efficiency and comprehensive cost. Simple installation , the effect of high operational reliability

Active Publication Date: 2008-02-20
AIRSYS REFRIGERATION ENG TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Water chilling unit applying natural cooling technology

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Embodiment Construction

[0011] The specific implementation will be described in detail below in conjunction with the accompanying drawings.

[0012] As shown in Figure 1, this embodiment is a chiller for process cooling, which requires 24-hour uninterrupted operation of the chiller; the outlet water temperature is maintained at 20°C all year round; the rated cooling capacity is 10kW; the cooling load demand is 5 to 9kW; The minimum outdoor temperature is -15°C; the maximum is 37°C. It consists of an indoor unit 2 and an outdoor unit 1; the indoor unit 2 includes a condenser 21, a compressor 22, an evaporator 23, an expansion valve 24 and a cooling pump 25, wherein the condenser 21, compressor 22, evaporator 23 and expansion The valve 24 forms a sealed system through the pipeline, the outdoor unit 1 and the condenser 21 form a cooling water circulation through the pipeline, and the cooling pump 25 is arranged on the return water pipeline of the cooling water circulation, and it also includes a three-w...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F3/06F24F13/30
Inventor 陈学勤
Owner AIRSYS REFRIGERATION ENG TECH BEIJING
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