Title:
PROTECTIVE DEVICE FOR COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2017/175273
Kind Code:
A1
Abstract:
A protective device (50) for a compressor, provided with: a high pressure switch (5) for detecting a high-pressure abnormality in a refrigerant circuit; an auxiliary switch (7) for supplying a power supply signal when a high-pressure abnormality is not being detected by the high-pressure switch (5), and cutting off the supply of the power supply signal when the high-pressure switch (5) detects a high-pressure abnormality; a holding circuit (8) having an abnormality state and a normality state, and shifting from the normality state to the abnormality state when there is a change from a state in which the power supply signal is being supplied to a state in which the power supply signal is not being supplied; a control unit (2) for outputting a compressor drive signal, which indicates that a compressor is to be driven, when the holding circuit (8) is in the normality state; a buffer (3) for relaying the compressor drive signal outputted by the control unit (2) if the power supply signal is being supplied, and not relaying the compressor drive signal if the power supply signal is not being supplied; and a power element module (4) for driving the compressor on the basis of the compressor drive signal relayed by the buffer (3).
Inventors:
KIKUGAWA SATORU (JP)
Application Number:
PCT/JP2016/061016
Publication Date:
October 12, 2017
Filing Date:
April 04, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F04B39/00; F25B1/00; F25B49/02
Foreign References:
| JP2007225218A | 2007-09-06 | |||
| JP2009036056A | 2009-02-19 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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