EP 0488775 A3 19920923 - DETECTING SYSTEM FOR DETECTING AN INSUFFICIENT AMOUNT OF REFRIGERANT IN A COOLING APPARATUS AND COMPRESSOR CONTROL SYSTEM INCORPORATING SAME
Title (en)
DETECTING SYSTEM FOR DETECTING AN INSUFFICIENT AMOUNT OF REFRIGERANT IN A COOLING APPARATUS AND COMPRESSOR CONTROL SYSTEM INCORPORATING SAME
Publication
Application
Priority
JP 33706490 A 19901130
Abstract (en)
[origin: EP0488775A2] A detecting system is provided for detecting an insufficient amount of refrigerant in a cooling apparatus having a refrigerant circuit (11) which includes a compressor (12), a condenser (13) and an evaporator (16). The system has a refrigerant state detecting sensor (19, 30) provided in a high-pressure side path of the refrigerant circuit (11) for detecting an insufficient amount of refrigerant in the circuit (11) by sensing a mixing state of refrigerant in a liquid phase and refrigerant in a vapor phase. The detecting system is incorporated into a compressor control system having a compressor deactivating circuit coupled to the refrigerant state detecting sensor (19, 30) for deactivating the compressor (12) in response to a signal provided by the refrigerant state detecting sensor (19, 30). The refrigerant state detecting sensor (19, 30) determines that an insufficient amount of refrigerant exists at an early stage by detecting the mixing state of refrigerant. Since the compressor (12) is stopped at an earlier stage than in conventional systems, undesirable drive of the compressor (12) and damage to the compressor (12) can be prevented.
IPC 1-7
IPC 8 full level
F25B 49/02 (2006.01); F25B 41/00 (2006.01); F25B 49/00 (2006.01)
CPC (source: EP)
F25B 41/006 (2013.01); F25B 49/005 (2013.01); F25B 2500/222 (2013.01)
Citation (search report)
- [X] US 4167858 A 19790918 - KOJIMA YASUHUMI, et al
- [A] US 3412570 A 19681126 - PRUETT SR GEORGE H
- [A] US 4328682 A 19820511 - VANA JOHN H
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0488775 A2 19920603; EP 0488775 A3 19920923; JP H04203866 A 19920724
DOCDB simple family (application)
EP 91311098 A 19911129; JP 33706490 A 19901130