Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2021/038660
Kind Code:
A1
Abstract:
This air conditioner comprises: a refrigerant circuit for circulating a refrigerant, the refrigerant circuit having a compressor that compresses and discharges the refrigerant, a flow path switching device that is connected to the refrigerant pipe of the compressor, an indoor heat exchanger that is connected by piping through the flow path switching device and exchanges heat between the refrigerant discharged from the compressor and indoor air, a throttle device that decompresses the refrigerant condensed in the indoor heat exchanger, an outdoor heat exchanger that has an upper outdoor heat exchanger and a lower outdoor heat exchanger with flow paths independent of each other and exchanges heat between the refrigerant that has passed through the throttle device and outside air, a first flow path selection device that is connected to the pipe of the upper outdoor heat exchanger of the outdoor heat exchanger and the suction-side pipe of the compressor, a second flow path selection device that is connected to the pipe of the lower outdoor heat exchanger of the outdoor heat exchanger and the suction-side pipe of the compressor, and a bypass pipe that connects the discharge side of the compressor to the first flow path selection device and the second flow path selection device; and a control device which controls the flow path switching device to switch the refrigerant circuit between a cooling circuit in which the first flow path selection device and the second flow path selection device cause the refrigerant discharged from the compressor and input through the bypass pipe to flow to the upper outdoor heat exchanger and the lower outdoor heat exchanger, respectively, and a heating circuit in which the first flow path selection device and the second flow path selection device cause the refrigerant input from the upper outdoor heat exchanger and the lower outdoor heat exchanger to flow to the suction-side pipe of the compressor. The first flow path selection device and the second flow path selection device are constantly energized three-way valves which can restrict a main valve position when not energized. When the refrigerant circuit is switched to the cooling circuit by the flow channel switching device, and the first flow path selection device and/or the second flow path selection device is not energized, the non-energized first flow path selection device or second flow path selection device outputs the refrigerant discharged from the compressor and input through the flow path switching device and the bypass pipe to the upper outdoor heat exchanger or the lower outdoor heat exchanger.
More Like This:
| WO/2020/088425 | AIR CONDITIONER AND CONTROL METHOD THEREOF |
| JP2020193761 | REFRIGERATING SYSTEM |
Inventors:
KAWASHIMA ATSUSHI (JP)
HAYAMARU YASUHIDE (JP)
SATO MASAKAZU (JP)
ADACHI YUSUKE (JP)
HAYAMARU YASUHIDE (JP)
SATO MASAKAZU (JP)
ADACHI YUSUKE (JP)
Application Number:
PCT/JP2019/033161
Publication Date:
March 04, 2021
Filing Date:
August 23, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B47/02
Domestic Patent References:
| WO2014020651A1 | 2014-02-06 | |||
| WO2017216861A1 | 2017-12-21 |
Foreign References:
| JP2015224829A | 2015-12-14 | |||
| JP2011052883A | 2011-03-17 | |||
| JP2010139097A | 2010-06-24 | |||
| JP2017026171A | 2017-02-02 | |||
| CN208238292U | 2018-12-14 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
Download PDF: