Title:
HEAT PUMP DEVICE AND REFRIGERANT BYPASS METHOD
Document Type and Number:
WIPO Patent Application WO/2011/092802
Kind Code:
A1
Abstract:
A disclosed outdoor unit (100) is provided with a bypass circuit (120) that carries some of a refrigerant discharged from a compressor (3) towards a connection section (19) when defrosting. A control device (14) in the outdoor unit (100) opens an electromagnetic valve (10) in the bypass circuit (120) on the basis of the water temperature (TW(c, in)) at a water inlet on a water heat exchanger (2) and the water temperature (TW(a, out)) at a water outlet on said water heat exchanger (2) when defrosting. When the electromagnetic valve (10) is open during defrosting, the control device (14) controls a third expansion valve (8) in the bypass circuit (120) on the basis of the refrigerant temperature (TR(d, in)) at a refrigerant inlet on the water heat exchanger (2) and the refrigerant temperature (TR(b, out)) at a refrigerant outlet on the water heat exchanger (2).
Inventors:
AOYAGI, Yoshiro (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2010/050949
Publication Date:
August 04, 2011
Filing Date:
January 26, 2010
Export Citation:
Assignee:
Mitsubishi Electric Corporation (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
International Classes:
F25B47/02; F25B1/00
Attorney, Agent or Firm:
MIZOI, Shoji et al. (MIZOI INTERNATIONAL PATENT FIRM, NTA Ofuna Building 3rd floor 17-10, Ofuna 2-chome, Kamakura-sh, Kanagawa 56, 〒2470056, JP)
Claims: