Double-source commercial air conditioner and working method thereof

Abstract

The invention discloses a double-source commercial air conditioner and a working method thereof. The double-source commercial air conditioner comprises a steam compression system, an economizer systemand a hot gas defrost system. According to the double-source commercial air conditioner and the working method thereof, a compressor is driven directly by a direct-combustion internal combustion engine, power transfer loss can be avoided, and the energy utilization rate is effectively improved; an air source and water source heat pump technology is coupled in the form of arranging a parallel typeair cooled heat exchanger and shell heat exchanger, a medium temperature evaporator is introduced on the basis of air replenishment of an economizer to improve the hot gas bypass defrosting technology, the cascaded utilization of waste heat energy is realized while air replenishment in the middle of the compressor is strengthened, and the heating capacity and COP of the air conditioner are effectively improved; and aiming at the characteristic changes of winter and summer environments, the air conditioner can realize multi-working condition operations of air source type and waste heat type heating and air-cooled type and water-cooled type refrigeration, the working reliability of the air conditioner is improved, and the energy efficiency ratio can be increased by 10%-15% on the basis of existing 3-5.

Description

technical field [0001] The invention relates to a commercial air conditioner, more specifically, a dual-source commercial air conditioner. It belongs to the field of refrigeration and air-conditioning engineering. Background technique [0002] While air-conditioning devices provide us with a comfortable living environment, their energy consumption is also increasing year by year. Under the development situation of "new and old kinetic energy transformation" and "low-carbon energy saving", it is more and more important to develop new low-energy and high-efficiency air-conditioning devices; and In order to realize the energy saving and consumption reduction of air-conditioning devices, domestic and foreign refrigeration and air-conditioning enterprises and colleges and universities have carried out a large number of innovative scientific research, such as patent application number: CN200720058740.6, a utility model patent named "high-efficiency multi-functional air-conditionin...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the technical deficiencies of high energy consumption and low energy of existing commercial air conditioners. While realizing the coupled heat pump system of air source and water source heat exchangers, the invention introduces heat energy cascade utilization and intermediate air supply technology of compressors, relying on double parallel air-cooled heat exchangers Heater + hot gas bypass defrosting technology solves the difficulty of defrosting air-cooled heat exchangers and realizes multiple high-efficiency cooling and heating operating modes for air conditioners

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