Powerful-refrigeration and rapid-defrosting air-conditioning heat pump system and working mode thereof

Abstract

The invention discloses a powerful-refrigeration and rapid-defrosting air-conditioning heat pump system. The powerful-refrigeration and rapid-defrosting air-conditioning heat pump system comprises a main compressor, an auxiliary compressor, a four-way valve, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a first electromagnetic valve, a second electromagnetic valve, a first throttling portion, a first one-way valve, a second throttling part, a second one-way valve, a third throttling part, a third one-way valve, a fourth throttling part and a coil temperature sensor. A main refrigeration system and an auxiliary refrigeration system are composed in the mode that the parts are connected; the air-conditioning heat pump system has the powerful-refrigeration function and the defrosting function through flowing route circulation of the main refrigeration system and the auxiliary refrigeration system.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner heat pump system with powerful refrigeration and rapid defrosting and its working method. Background technique [0002] When the existing air-conditioning heat pump system is in cooling operation, as the outdoor ambient temperature rises, the condensing temperature rises, the heat transfer of the outdoor condenser decreases, the return air temperature and the superheat of the temperature sensor become larger, and the opening of the throttle part increases accordingly. Larger, the liquid return temperature and system pressure rise, the enthalpy difference of the evaporation side decreases, and then the cooling capacity becomes smaller, and the energy efficiency decreases. [0003] The existing air-conditioning heat pump system is prone to frost at low ambient temperature, which affects the air volume and heat exchange effect of the system, which in turn...

AI Technical Summary

Problems solved by technology

[0003]The existing air-conditioning heat pump system is prone to frost at low ambient temperature, which affects the air volume and heat exchange effect of the system, thereby affecting the heating capacity and energy efficiency ratio of the unit

The existing defrosting technology uses the four-way valve to change direction and absorb the heat on the use side to defrost, which will cause fluctuations in the temperature on the use side; considering that the temperature drop on the use side should not be too large, the opening of the electronic expansion valve in the prior art defrosting is relatively small. small, slow defrosting

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