Title:
VAPOR COMPRESSION-TYPE REFRIGERATOR AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2017/154934
Kind Code:
A1
Abstract:
The present invention is provided with an extraction device (40) including: a cooling unit for cooling gas that has been extracted from a condenser (5) and condensing condensed gas; and an exhaust pump (48) for discharging, to the exterior, uncondensed gas that has been isolated without having been condensed by the cooling unit. A current temperature difference, which is the difference between the current saturation temperature in the condenser (5) and the current outlet temperature of a cooling water heat transfer tube (5a), and a planned temperature difference, which is a planned value, are computed. Using information on an in-tube fouling temperature difference elevation, which is a difference between the saturation temperature in the condenser (5) and the outlet temperature of the cooling water heat transfer tube (5a) and which is predetermined assuming in-tube fouling of the cooling water heat transfer tube (5a), the temperature difference elevation due to the current in-tube fouling is computed. The extraction device (40) is operated if the elevation of the current temperature difference from the planned temperature difference is greater by a predetermined value or more than the temperature difference elevation due to the current in-tube fouling.
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Inventors:
WAJIMA KAZUKI (JP)
TOGANO YOSHIE (JP)
MIYOSHI NAOYA (JP)
TOGANO YOSHIE (JP)
MIYOSHI NAOYA (JP)
Application Number:
PCT/JP2017/009100
Publication Date:
September 14, 2017
Filing Date:
March 07, 2017
Export Citation:
Assignee:
MITSUBISHI HEAVY IND THERMAL SYSTEMS LTD (JP)
International Classes:
F25B43/04
Foreign References:
| JPS5940775U | 1984-03-15 | |||
| JPS57122264A | 1982-07-30 | |||
| JPH01139973A | 1989-06-01 | |||
| JPH0285283U | 1990-07-04 |
Attorney, Agent or Firm:
FUJITA, Takaharu (JP)
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