REFRIGERATION SYSTEM WITH FLUID DEFROST

• Main Authors: Laurentius Paul R, Hanlon Sean M, Fowler Tobey D
• Format: Patent
• Language: English
• Published: 12.10.2017
• Subjects: BLASTING; COFFEE MILLS; COLD ROOMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS; DOMESTIC ARTICLES OR APPLIANCES; FURNITURE; HEAT PUMP SYSTEMS; HEATING; HUMAN NECESSITIES; ICE-BOXES; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; PAYING COUNTERS; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; REFRIGERATORS; SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS,STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; SPICE MILLS; SUCTION CLEANERS IN GENERAL; WEAPONS

A refrigeration system having a refrigerant circuit including a condenser, a flow control device, an evaporator, and a compressor connected in series. The compressor is configured to circulate a cooling fluid through the refrigerant circuit. The refrigerant circuit has an inlet line fluidly connecting the condenser to the evaporator and a suction line fluidly connecting the evaporator to the compressor. A heater is positioned to heat the cooling fluid during a defrost mode, and a pressure control is coupled to the refrigerant circuit downstream of the evaporator. In the defrost mode, the pressure control apparatus is configured to increase system pressure during the defrost mode to maintain flow of refrigerant into the evaporator and to control flow of cooling fluid to the compressor.