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Patent Searching and Data


Title:
EXHAUST HEAT RECOVERY HEAT PUMP DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/081781
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an exhaust heat recovery heat pump device such that the liquid compression of the high-stage compressor of a two-stage compressor can be reliably avoided when the high-stage compressor operates using, as a suction refrigerant, a mixed refrigerant of the intermediate-pressure refrigerant from a gas-liquid separator with the intermediate-pressure refrigerant from the low-stage compressor. This exhaust heat recovery heat pump device is equipped with a refrigerant adjustment mechanism which introduces a mixed refrigerant of the refrigerant discharged from the gas-side outlet of a gas-liquid separator 4 with the refrigerant compressed by a low-stage compression mechanism 1a into the suction opening of a high-stage compression mechanism 1b, the mixed refrigerant serving as a gas refrigerant having the degree of superheat that is a predetermined value or more. The refrigerant adjustment mechanism is equipped with: a level sensor 21 which is provided to the gas-liquid separator 4 so as to detect the liquid level; an opening and closing control valve 7 which is provided to an intermediate pipe L1; and a control unit 20 which controls the opening and closing control valve 7 to a closed position if the liquid level detected by the level sensor 21 reaches a predetermined position based on a gas-side communication port to the intermediate pipe L1.

Inventors:
NAKAMURA JUN (JP)
AJIMA MASAAKI (JP)
SHIBATA SHUHEI (JP)
TERAWAKI HIROYUKI (JP)
Application Number:
PCT/JP2015/081798
Publication Date:
May 18, 2017
Filing Date:
November 11, 2015
Export Citation:
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Assignee:
FUJI ELECTRIC CO LTD (JP)
International Classes:
F25B1/00; F25B1/10
Foreign References:
JP2006177597A2006-07-06
JP2014119157A2014-06-30
JPH11142001A1999-05-28
JP2010216687A2010-09-30
JP2014016079A2014-01-30
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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