Air-cooling direct-current frequency-conversion magnetic levitation nature cold source water chilling unit

Abstract

The invention discloses an air-cooling direct-current frequency-conversion magnetic levitation nature cold source water chilling unit. The water chilling unit comprises a magnetic levitation compressor, an air-cooling condenser, a throttle valve and an evaporator, wherein the outlet of the magnetic levitation compressor is successively connected with the air-cooling condenser, the throttle valve and the evaporator through a pipeline, and a steam outlet of the evaporator is communicated with an air suction port of the magnetic levitation compressor; the outlet of the air-cooling condenser is provided with a branch pipe communicated with a motor cooling inlet of the magnetic levitation compressor, and a nature cold source circulating water system comprises two branch pipe pipelines with valves; and the inlets of the two branch pipe pipelines are connected with a water returning pipeline, the outlets of the two branch pipe pipelines are communicated with a water inlet of the evaporator so as to form circulation, and one of the two branch pipe pipelines is provided with a heat exchange coil. The air-cooling direct-current frequency-conversion magnetic levitation nature cold source water chilling unit provided by the invention has the beneficial effects that the magnetic levitation compressor is used to avoid, a water return problem; an efficient flooded evaporator is utilized and a direct current frequency conversion technology and a nature cold source utilization technology are integrated, thus providing an omnibearing, low-cost, safe and reliable energy conservation measures for the full-year refrigeration field.

Description

technical field [0001] The invention belongs to air-conditioning refrigeration technology, in particular to a refrigeration compressor and a natural cold source combined chiller. Background technique [0002] With the promulgation of national energy conservation and emission reduction policies, the use of second cold sources and natural cold sources has become one of the main energy-saving means in the air-conditioning industry, especially in the field of computer room air-conditioning, because data centers have cooling needs throughout the year, in transitional seasons and winter The energy saving effect of using natural cold source will be more significant. [0003] The cooling demand of data centers generally comes from the cooling needs of IT equipment. Data centers that use chilled water generally exchange heat between the chilled water in the chilled water equipment and the air in the computer room, so as to achieve cooling in the computer room and increase the water t...

AI Technical Summary

Problems solved by technology

[0006] However, for year-round refrigeration units, due to relatively high reliability requirements, the oil return problem of flooded units is worrying about reliability when the outdoor temperature and load change, so year-round refrigeration units are generally Dry-type units, dry-type units generally have a low energy efficiency ratio

Moreover, due to the use of fixed-frequency compressors in the current use of natural cooling sources, when the capacity of natural cooling sources is insufficient in transitional seasons, when it is necessary to turn on the compressor to supplement the cooling capacity, the two cannot cooperate well to achieve a real sense of energy saving

[0007] At present, centrifugal compressors are prone to surge, clogging, etc., especially when the pressure ratio is relatively high, so centrifugal compressors are generally seldom used in air-cooled products, mainly because of the high pressure ratio

The magnetic levitation centrifugal compressor is a type of compression. Although the compressor itself has done a lot of work on the customer's high pressure ratio, compared with the screw, it still needs the high pressure ratio problem of the customer in extremely rare cases in summer.

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