Refrigeration cycle device, and refrigeration cycle device control method
WO2025070614A1 Publication Date: 2025-04-03FUJITSU GENERAL LTD
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Patent Information
- Application Number
- PCT/JP2024/034437
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-09-29
- Filing Date
- 2024-09-26
- Publication Date
- 2025-04-03
AI Technical Summary
Technical Problem
During the defrosting operation of air conditioners, the prior art is difficult to effectively prevent the indoor temperature from dropping, resulting in a decrease in user comfort, while using pressure sensors to detect condensation pressure increases costs.
Method used
By introducing a heat storage device into the cooling circulation device and storing heat by using the heat storage device during the defrost operation, the expansion valve is controlled to adjust the heat release rate to ensure the indoor temperature during the defrost process.
Benefits of technology
It effectively prevents the indoor temperature drop during defrost operation, improves user comfort, and avoids the increased cost of using pressure sensors.
✦ Generated by Eureka AI based on patent content.
Abstract
The objective of the present invention is to accumulate heat necessary for defrosting while suppressing a deterioration in the comfort level for a user when a defrosting operation is performed, and to avoid an increase in cost when both are achieved. In this refrigeration cycle device, a compressor (1), an indoor heat exchanger (2), an outdoor heat exchanger (3), a heat storage heat exchanger (4) for exchanging heat between a heat storage material and a refrigerant, a plurality of expansion valves (5) having an adjustable opening degree, and a plurality of switching valves (6) for switching a circulation path of the refrigerant in a refrigerant circuit (C) for circulating the refrigerant, between a heat storage / space heating operation and a defrosting operation, are connected to the refrigerant circuit, wherein: the refrigeration cycle device is provided with a heat storage temperature sensor (HS) for detecting the temperature of the heat storage material, and a control unit (7) for controlling the plurality of expansion valves (5); one of the plurality of expansion valves (5) is a first expansion valve (51) provided on the upstream side of the heat storage heat exchanger which functions as a condenser; and the control unit (7) controls the opening degree of the first expansion valve such that a second slope indicating an amount of increase per unit time in the temperature of the heat storage material in which heat is stored during the heat storage / space heating operation matches a preset first slope.
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