Refrigeration apparatus

A refrigerant circuit (10) of a refrigeration apparatus is filled up with carbon dioxide as a refrigerant. In the refrigerant circuit (10), a first compressor (21) and a second compressor (22) are arranged in parallel. The first compressor (21) is connected to both an expander (23) and a first elect...

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Bibliographische Detailangaben
1. Verfasser:	SAKITANI KATSUMI,MORIWAKI MICHIO,OKAMOTO MASAKAZU,KUMAKURA EIJI,OKAMOTO TETSUYA
Format:	Patent
Sprache:	eng
Schlagworte:	AIRCRAFT ANALOGOUS ARRANGEMENTS USING OTHER WAVES ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT AVIATION BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS COSMONAUTICS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES EQUIPMENT FOR FITTING IN OR TO AIRCRAFT FLYING SUITS GYROSCOPIC INSTRUMENTS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MANUFACTURE OR STORAGE OF ICE MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS MECHANICAL ENGINEERING NAVIGATION PARACHUTES PERFORMING OPERATIONS PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING SIGNALLING SURVEYING TESTING TRAFFIC CONTROL SYSTEMS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A refrigerant circuit (10) of a refrigeration apparatus is filled up with carbon dioxide as a refrigerant. In the refrigerant circuit (10), a first compressor (21) and a second compressor (22) are arranged in parallel. The first compressor (21) is connected to both an expander (23) and a first electric motor (31), and is driven by both of the expander (23) and the first electric motor (31). On the other hand, the second compressor (22) is connected only to a second electric motor (32), and is driven by the second electric motor (32). In addition, the refrigerant circuit (10) is provided with a bypass line (40) which bypasses the expander (23). The bypass line (40) is provided with a bypass valve (41). And, the capacity of the second compressor (22) and the valve opening of the bypass valve (41) are regulated so that the COP of the refrigeration apparatus is improved after enabling the refrigeration apparatus to operate properly in any operation conditions.