Title:
空気調和装置
Document Type and Number:
Japanese Patent JP7341360
Kind Code:
B2
Abstract:
Provided is an air-conditioning apparatus having a low-outside-air-temperature cooling operation mode. The air-conditioning apparatus includes: a refrigerant circuit in which a compressor, an outdoor heat exchanger, a pressure reducing device, and an indoor heat exchanger are connected in sequence by a pipe, and configured to allow refrigerant to cycle through the refrigerant circuit; an outdoor fan configured to send air to the outdoor heat exchanger; an outdoor air temperature sensor configured to measure a temperature of outside air; an indoor heat exchanger intermediate temperature sensor configured to measure a temperature of refrigerant flowing through an intermediate portion of the indoor heat exchanger; an indoor heat exchanger outlet temperature sensor configured to measure a temperature of refrigerant flowing through an outlet of the indoor heat exchanger; and a controller configured to, when a measured value from the outdoor air temperature sensor is equal to or less than a predetermined value, perform the low-outside-air-temperature cooling operation mode, wherein in the low-outside-air-temperature cooling operation mode, the controller is configured to reduce a rotation speed of the outdoor fan, and to, when a difference between a measured value from the indoor heat exchanger outlet temperature sensor and a measured value from the indoor heat exchanger intermediate temperature sensor is equal to or greater than a first threshold, increase an opening degree of the pressure reducing device.
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Inventors:
Shohei Ishimura
Naofumi Takenaka
Masakazu Kondo
Yoshiyuki Tada
Atsushi Kawashima
Naofumi Takenaka
Masakazu Kondo
Yoshiyuki Tada
Atsushi Kawashima
Application Number:
JP2022578003A
Publication Date:
September 08, 2023
Filing Date:
February 01, 2021
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
F24F11/84; F24F11/86; F24F11/871
Domestic Patent References:
| JP2010101569A | ||||
| JP2008025932A | ||||
| JP2009109113A | ||||
| JP2016061456A | ||||
| JP2003279110A |
Foreign References:
| WO2018221652A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Kisa Patent and Trademark Office