Title:
AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/162937
Kind Code:
A1
Abstract:
This air conditioning device has a low outside air cooling operation mode. This air conditioning device comprises: a refrigerant circuit in which a compressor, an outdoor heat exchanger, a decompression device, and an indoor heat exchanger are sequentially connected via piping, and through which a refrigerant circulates; an outdoor fan that sends air to the outdoor heat exchanger; an outside air temperature sensor that measures the temperature of outdoor air; an indoor heat exchanger middle temperature sensor that measures the temperature of the refrigerant flowing through the middle of the indoor heat exchanger; an indoor heat exchanger exit temperature sensor that measures the temperature of the refrigerant flowing through an exit of the indoor heat exchanger; and a control device that is configured such that, if a measurement value from the outside air temperature sensor is at or below a specified value, a low outside air cooling operation mode is implemented. In the low outside air cooling operation mode, the control device reduces the number of rotations of the outdoor fan and, when the difference between a measurement value from the indoor heat exchanger exit temperature sensor and a measurement value from the indoor heat exchanger middle temperature sensor is at or above a first threshold value, increases an opening degree of the decompression device.
Inventors:
ISHIMURA SHOHEI (JP)
TAKENAKA NAOFUMI (JP)
KONDO MASAKAZU (JP)
TADA YOSHIYUKI (JP)
KAWASHIMA ATSUSHI (JP)
TAKENAKA NAOFUMI (JP)
KONDO MASAKAZU (JP)
TADA YOSHIYUKI (JP)
KAWASHIMA ATSUSHI (JP)
Application Number:
PCT/JP2021/003517
Publication Date:
August 04, 2022
Filing Date:
February 01, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F24F11/84; F24F11/86; F24F11/871; F24F110/10; F24F110/12; F24F140/20
Domestic Patent References:
| WO2018221652A1 | 2018-12-06 |
Foreign References:
| JP2010101569A | 2010-05-06 | |||
| JP2008025932A | 2008-02-07 | |||
| JP2009109113A | 2009-05-21 | |||
| JP2016061456A | 2016-04-25 | |||
| JP2003279110A | 2003-10-02 |
Other References:
See also references of EP 4286761A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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