Title:
AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/228407
Kind Code:
A1
Abstract:
This air conditioning device comprises: a compressor that compresses a refrigerant; a condenser that performs heat exchange between a refrigerant and air and condenses the refrigerant; and a pressure reduction valve that reduces the pressure of the refrigerant and an opening degree of which can be changed; an evaporator that performs heat exchange between the refrigerant and air and causes the refrigerant to evaporate; and refrigerant piping that connects the compressor, condenser, pressure reduction valve, and evaporator; and a control device that controls the operating frequency of the compressor and the opening degree of the pressure reduction valve, wherein the control device avoids, as avoidance targets, among a plurality of control patterns determined by combinations of the operating frequency of the compressor and the opening degree of the pressure reduction valve, a set of control patterns that generate abnormal noises of a magnitude at or above a threshold value, or control patterns that generate abnormal noises of a magnitude at or above the threshold value during transition.
Inventors:
SUGIYAMA MAKI (JP)
Application Number:
PCT/JP2022/021747
Publication Date:
November 30, 2023
Filing Date:
May 27, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F24F11/64; F24F11/86; F24F11/89; F24F120/10; F24F130/40; F24F140/12; F24F140/20
Domestic Patent References:
| WO2020026371A1 | 2020-02-06 | |||
| WO2018109924A1 | 2018-06-21 | |||
| WO2018122943A1 | 2018-07-05 |
Foreign References:
| US20190170603A1 | 2019-06-06 | |||
| JP2020165594A | 2020-10-08 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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