Patent ID: 7743621
Filing Date: 2010-06-29
Classification: F25B

Abstract:
1. A multi-range composite-evaporator type cross-defrosting system comprising: a) a refrigeration circuit comprising of four sections, which are a refrigerant-compressing section, a refrigerant-condensing section, a refrigerant-evaporating section, and a cross-defrosting section; said refrigerant-compressing section provides a flow of pressurized-refrigerant to said refrigerant-condensing section and said cross-defrosting section; said refrigerant-condensing section will condense said flow of pressurized-refrigerant therein, and release the heat energy for air-conditioning; said refrigerant-condensing section provides a flow of refrigerant to said refrigerant-evaporating section; said refrigerant-evaporating section absorbs heat from the outdoor environment and evaporates said flow of refrigerant therein, and then produces a flow of evaporated-refrigerant into said refrigerant-compressing section; b) said refrigerant-compressing section comprises at least one compressor ( c) said refrigerant-condensing section comprises at least one main condenser ( d) said refrigerant-evaporating section comprises at least two composite-evaporator units, which are first composite-evaporator ( e) said cross-defrosting section comprises one refrigerant passage from said main compressor ( f) flow control means for independently initiating a flow of pressurized refrigerant from said refrigerant-compressing section to the defrost-condensation coil ( g) flow control means for independently initiating a flow of pressurized refrigerant from said refrigerant-compressing section to the defrost-condensation coil ( h) flow control means for independently disabling the refrigerant passage from said main compressing section to the evaporation coil of first composite-evaporator ( i) flow control means for independently disabling the refrigerant passage from said main compressing section to the evaporation coil of second composite-evaporator ( j) a control system for commencing a defrost-cycle of cross-refrigerant defrosting process by controlling said flow control means and outdoor-air-intake means.