Carbon dioxide air conditioner parallel-compressor unit

Abstract

A carbon dioxide air conditioner parallel-compressor unit comprises a water heat exchanger and compressors. The water heat exchanger is connected with a wind heat exchanger through a pipeline, and an electromagnetic valve and an expansion valve are arranged on the pipeline; the wind heat exchanger is connected with a reversing valve set which is connected with a gas and liquid separator; the gas and liquid separator is connected with an air returning buffer tank which is connected with the compressors, and the compressors are connected with an oil separator; and the oil separator is connected with an exhaust collector which is connected with the reversing valve set, and the reversing valve set is selectively connected with the water heat exchanger or wind heat exchanger according to requirements. Environment-friendly carbon dioxide refrigerants are adopted, and the compressors connected in parallel are higher in efficiency; compared with a single unit, the parallel-compressor unit has the beneficial effects that mounting is convenient, space is saved, and the cold and heat amount adjusting range is wide; and compared with a frequency converter, the parallel-compressor unit has the beneficial effects that the reliability of the unit is higher, the unit runs at the optimum frequency all the time, the unit runs at a high load in the daytime and runs at a low load at night.

Description

technical field [0001] The invention belongs to the technical field of new energy application equipment, and in particular relates to a carbon dioxide heating and cooling air conditioning parallel unit. Background technique [0002] Carbon dioxide mainly has advantages in low-temperature heating and hot water heating. It has advantages in using carbon dioxide units for heating at low temperatures in winter in North China. In summer, refrigeration is required at the same time. The existing carbon dioxide single-unit cooling and heating models need to be installed in buildings with large cooling and heating areas. There are multiple single machines, which is inconvenient to install and troublesome to control, and the demand for cooling and heating loads varies greatly during the day and night. The carbon dioxide cooling and heating parallel unit can expand the capacity of a single compressor to two, three, five, etc., and the cooling and heating area can be automatically adjus...

AI Technical Summary

Problems solved by technology

[0002] Carbon dioxide mainly has advantages in low-temperature heating and hot water heating. It has advantages in using carbon dioxide units for heating at low temperatures in winter in North China. In summer, refrigeration is required at the same time. The existing carbon dioxide single-unit cooling and heating models need to be installed in buildings with large cooling and heating areas. Single machine with multiple units, inconvenient installation, troublesome control, large changes in demand for cooling and heating loads during the day and night

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