All-year cold supply chiller with natural cooling function

Abstract

The invention relates to an all-year cold supply chiller with natural cooling function. A compressor, an air connecting pipe, a condenser, a liquid connecting pipe, a throttling gear and an evaporator form a steam compression type refrigeration circulation loop; the evaporator, the air connecting pipe, the condenser arranged on the evaporator and the liquid connecting pipe, which are all in the steam compression type refrigeration circulation loop form a cold medium natural circulation loop by opening a heat pipe air valve on a heat pipe branch and a heat pipe liquid valve connected in parallel with the throttling gear, and closing a refrigeration air valve on an air suction pipe of the compressor. The all-year cold supply chiller can adopt an integral structure or a split structure, keeps the function of making air conditioning cold water in summer, can sufficiently utilize the natural cold energy of outdoor air to make cold water in transition seasons and winter, provides cold water for all-year cold supply areas, such as inner zone of buildings and highly heating areas, and has the remarkable advantages of simple structure, high efficiency and energy saving.

Description

technical field [0001] The invention relates to a year-round cooling water chiller with a natural cooling function, which is especially suitable for occasions that need to provide cold water for air conditioning in transitional seasons and winters, and belongs to equipment in the field of refrigeration and air conditioning. Background technique [0002] At present, there are many areas in the building that generate a lot of heat all year round, such as the inner area of ​​the building, large-scale equipment room, special cooling machine room, etc. These areas not only need cooling in summer, but also need cooling in transitional seasons and winter , to offset larger cooling loads in the zone. There is no doubt that when using an all-air central air-conditioning system, it is a good method to use outdoor fresh air in transitional seasons or winter for cooling, but the high energy consumption of air supply and the large space occupied by air ducts restrict the use of all-air s...

AI Technical Summary

Problems solved by technology

However, there are two significant disadvantages in the use of air-cooled chillers: (1) the operation of power components such as compressors and fans brings large energy consumption; (2) when the unit is running in winter, the temperature at the condensation end is often too low, resulting in refrigeration The system cannot operate normally. If the condensing pressure is increased by taking measures such as condensing pressure regulating valve and variable speed adjustment of cooling fan, etc., problems such as increased energy consumption of the unit and reduced operational reliability will occur.

When a cooling tower is used for cooling, the low temperature environment in winter will cause the cooling water pipes and cooling towers to freeze. For example, anti-freezing measures such as heating and strengthening insulation for cooling water pipes and cooling tower water trays will increase both investment and operating costs.

[0005] The above analysis shows that in the existing fan coil unit + fresh air air conditioning system, it is still difficult to achieve efficient and reliable cooling in the transition season and winter, and it is necessary to provide a more efficient technical solution for producing cold water

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