Title:
AIR CONDITIONING DEVICE
Document Type and Number:
Japanese Patent JP2023107879
Kind Code:
A
Abstract:
To provide an air conditioning device capable of suppressing a choke phenomenon that flow of a refrigerant in a refrigerant circuit is disturbed by an expansion valve whose opening is reduced, in a reheating dehumidification operation.SOLUTION: A control portion executes a reheating dehumidification operation in which a first utilization heat exchange portion is functioned as a condenser and a second utilization heat exchange portion is functioned as an evaporator by controlling a refrigerant circuit. An opening of a utilization expansion valve is controlled by the control portion. The control portion controls the opening of the utilization expansion valve to a prescribed first opening or less in the reheating dehumidification operation, temporarily controls the opening of the utilization expansion valve to a prescribed second opening larger than the first opening when prescribed conditions are established, then continues the reheating dehumidification operation in a state that the opening of the expansion valve is the prescribed first opening or less, and determines whether or not the prescribed condition is established on the basis of a first temperature difference (ΔT1) as a temperature difference between a room temperature (Tr) and a temperature (Te) of the second utilization heat exchange portion.SELECTED DRAWING: Figure 3
More Like This:
| WO/2018/155056 | AIR CONDITIONER |
| JP7054308 | Environmental test equipment and air conditioning equipment |
| JP2023161037 | HEAT SOURCE SYSTEM, HEAT SOURCE MACHINE AND CONTROL DEVICE |
Inventors:
HARAGUCHI YU
ONUMA YOICHI
MORIYA SATONO
ONUMA YOICHI
MORIYA SATONO
Application Number:
JP2023096645A
Publication Date:
August 03, 2023
Filing Date:
June 13, 2023
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F24F11/84; F24F11/86; F25B29/00
Attorney, Agent or Firm:
Patent Attorney Corporation Shinju Global IP