DEFROSTER OF REFRIGERANT CIRCUIT

• Main Authors: SATO TAKASHI, MATSUURA DAI, YAMASAKI HARUHISA, ODA ATSUSHI, IMAI SATOSHI, SAITO TAKAYASU, MATSUMOTO KENZO, EBARA TOSHIYUKI, MATSUMORI HIROYUKI, TADANO MASAYA, SATO KAZUYA
• Format: Patent
• Language: English
• Published: 05.08.2008
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; ENGINE PLANTS IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEAT PUMP SYSTEMS; HEATING; INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MACHINES OR ENGINES IN GENERAL; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; WEAPONS

A defroster of a refrigerant circuit is provided to prevent pressure reversion of discharging and sucking in a second compression element by installing a two-step compression type compressor of intermediate pressure. A defroster of a refrigerant circuit comprises an electric motor element(14) inside an airtight container(12), first and second compression elements(32,34) driven by the electric motor element, a compressor(10), a gas cooler, a decompression device, an evaporator, a defrosting circuit, and a passage control device. The compressor discharges refrigerant gas compressed in the first compression element to the airtight container, and compresses the discharged refrigerant gas of intermediate gas in the second compression element. The refrigerant discharged from the second compression element is flowed into the gas cooler. The decompression device is contacted to an outlet of the gas cooler. The defrosting circuit supplies the refrigerant discharged from the first compression element to the evaporator without decompression. The passage control device controls circulation of the refrigerant in the defrosting circuit. The first compression element compresses the refrigerant from the evaporator.