Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/233654
Kind Code:
A1
Abstract:
The present invention is provided with: a high-stage-side refrigeration cycle circuit which connects a high-stage-side compressor, a high-stage-side condenser, a high-stage-side throttle device, and a high-stage-side evaporator to each other through piping to circulate a high-stage-side refrigerant therethrough; a low-stage-side refrigeration cycle circuit which connects a low-stage-side compressor, a low-stage-side condenser, a low-stage-side throttle device, and a low-stage-side evaporator to each other through piping to circulate a low-stage-side refrigerant therethrough; a cascade condenser which is formed of the high-stage-side condenser and the low-stage-side condenser and executes heat exchange between the high-stage-side refrigerant and the low-stage-side refrigerant; an external air temperature sensor which measures an external air temperature; a high-stage-side evaporation temperature sensor which measures a high-stage-side evaporation temperature; and a control device which executes processing of restricting the maximum drive frequency of the low-stage-side compressor when a combination of the external air temperature and the high-stage-side evaporation temperature is determined to be within an external air temperature-high-stage-side evaporation temperature restriction range in which a pressure in the low-stage-side refrigeration cycle circuit reaches a high pressure and exceeds a set pressure.
More Like This:
| JPS5912527 | [Title of the device] duality -- refrigeration equipment |
| JPS6176855 | CASCADE COUPING HEAT PUMP DEVICE |
| JP5641875 | Refrigeration equipment |
Inventors:
ONO HIDEKI (JP)
YASHIRO TAKANORI (JP)
ISHIHARA NOBUYA (JP)
FUKUHARA KEIZO (JP)
YASHIRO TAKANORI (JP)
ISHIHARA NOBUYA (JP)
FUKUHARA KEIZO (JP)
Application Number:
PCT/JP2022/022624
Publication Date:
December 07, 2023
Filing Date:
June 03, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B7/00; F25B1/00
Domestic Patent References:
| WO2015118580A1 | 2015-08-13 |
Foreign References:
| JP2013113534A | 2013-06-10 | |||
| JP2018132224A | 2018-08-23 | |||
| JP2004190917A | 2004-07-08 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
Download PDF:
Previous Patent: ESTIMATION DEVICE, ESTIMATION METHOD, AND PROGRAM
Next Patent: REFRIGERATION CYCLE DEVICE
Next Patent: REFRIGERATION CYCLE DEVICE