Title:
REFRIGERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/080275
Kind Code:
A1
Abstract:
[Problem] To provide a refrigeration device with which it is possible, through a relatively simple control of an expansion valve, to achieve effects such as prevention of overcooling of the showcase interior, excessive frosting on an evaporator, and liquid backflow to a compressor and a reduction in the number of times the compressor is started/stopped. [Solution] This invention is provided with low-stage-side coolant circuits (6A, 6B) provided with a low-stage-side compressor (21), a low-stage-side gas cooler (23), low-stage-side expansion valves (34), and low-stage-side evaporators (36). Also provided are control devices (57) for controlling the low-stage-side expansion valves (34). The control device (57) calculates a coolant overheating degree in a low-stage-side evaporator (36) from the coolant inlet temperature and the coolant outlet temperature of the low-stage-side evaporator (36), and selectively controls the valve opening degree of a low-stage-side expansion valve on the basis of the coolant overheating degree or the case interior temperature.
Inventors:
HIJI YUSUKE (JP)
MIYAGI KOSUKE (JP)
MIYAZAWA TADASHI (JP)
TAKAYAMA NOBUYUKI (JP)
MIYAGI KOSUKE (JP)
MIYAZAWA TADASHI (JP)
TAKAYAMA NOBUYUKI (JP)
Application Number:
PCT/JP2015/081840
Publication Date:
May 26, 2016
Filing Date:
November 12, 2015
Export Citation:
Assignee:
SANDEN HOLDINGS CORP (JP)
International Classes:
F25B1/00; A47F3/04; F25B5/02; F25B7/00; F25D11/00
Foreign References:
| JPH11281221A | 1999-10-15 | |||
| JP2005030679A | 2005-02-03 | |||
| JPH10205958A | 1998-08-04 | |||
| JP2010255993A | 2010-11-11 |
Other References:
See also references of EP 3249316A4
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