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Title:
CHILLING UNIT AND WATER-CIRCULATING TEMPERATURE-ADJUSTMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/211682
Kind Code:
A1
Abstract:
A chilling unit and a water-circulating temperature-adjustment system are provided with: a refrigerant circuit including a compressor, a pair of air-side heat exchangers, an expansion valve, and a heat medium-side heat exchanger which are connected by piping to circulate refrigerant; piping for circulating heat medium; a flow passageway switching device for switching the circulation path of refrigerant; a temperature sensor; pressure sensors; and a control device. The control device controls the compressor on the basis of a target exit temperature that is set in advance, a heat medium temperature measured by means of the temperature sensor, and a pressure difference of the heat medium measured by means of the pressure sensors. If the load of a load-side apparatus becomes a low load less than or equal to a lowest capacity of the compressor, start-stop avoidance control is implemented in a state in which the lowest capacity operation of the compressor is maintained, and one of the pair of air-side heat exchangers and the heat medium-side heat exchanger are connected in parallel by means of the flow passageway switching device.

Inventors:
YAMANO, Yoshio (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KADOWAKI, Kimitaka (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
AKIZUKI, Takahiro (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
ITO, Takuya (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
OKOSHI, Yasushi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2017/018815
Publication Date:
November 22, 2018
Filing Date:
May 19, 2017
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; F25B6/00; F25B13/00; F25B29/00
Domestic Patent References:
WO2017068631A12017-04-27
WO2016088262A12016-06-09
Foreign References:
JPH07120089A1995-05-12
JP2016053429A2016-04-14
JP2014159923A2014-09-04
JPS637314B21988-02-16
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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