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Title:
HEAT MEDIUM CIRCULATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/221383
Kind Code:
A1
Abstract:
Provided is a heat medium circulation system that utilizes a heat medium pressure difference obtained from detection values of an entrance pressure sensor and an exit pressure sensor respectively disposed at the entrance and the exit of a heat medium heat exchanger so as to prevent the heat medium from freezing within the heat medium heat exchanger, thereby enabling continuous operation. This heat medium circulation system is provided with a refrigeration cycle circuit and a heat medium circulation circuit, and has: an entrance temperature sensor; an entrance pressure sensor; an exit pressure sensor; an evaporation temperature detection sensor; and a control device that, in the case of a first condition under which freeze of the heat medium takes place within the heat medium heat exchanger, calculates an operation-time minimum flow volume that does not result in freeze of the heat medium within the heat medium heat exchanger, on the basis of a heat medium temperature detected at the heat medium entrance by the entrance temperature sensor and a refrigerant evaporation temperature detected by the evaporation temperature detection sensor, and controls a pump so as to operate at the operation-time minimum flow volume so that the heat medium pressure difference obtained from the detection values of the entrance pressure sensor and the exit pressure sensor becomes an operation-time minimum pressure difference.

Inventors:
YAMANO, Yoshio (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
OKOSHI, Yasushi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
ITO, Takuya (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
HIKONE, Takahito (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2016/068700
Publication Date:
December 28, 2017
Filing Date:
June 23, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
F25B1/00; F24F5/00; F24F11/02
Foreign References:
JP2011094937A2011-05-12
JP2014035092A2014-02-24
JP2015209988A2015-11-24
JP2003148816A2003-05-21
JP2015132444A2015-07-23
JP5622859B22014-11-12
Other References:
See also references of EP 3477221A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (East 8F, TORANOMON TWIN BLDG. 10-1 Toranomon 2-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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