Title:
VEHICLE AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2022/202836
Kind Code:
A1
Abstract:
An objective of the invention is to suppress the disturbance of air temperature supplied to a passenger compartment and maintain constant temperature when switching a heating mode. Provided is a vehicle air conditioner comprising: a refrigerant circuit including a compressor, an outdoor heat exchanger, a radiator, a first electronic expansion valve provided on the refrigerant inlet side of the outdoor heat exchanger, a refrigerant - heat medium heat exchanger, and a second electronic expansion valve provided on the refrigerant inlet side of the refrigerant - heat medium heat exchanger; a heat medium circuit that circulates a heat medium to exchange heat between the refrigerant and the heat medium in the refrigerant - heat medium heat exchanger; and a control device that controls the refrigerant circuit and the heat medium circuit, wherein the control device has an outside air heat absorption heating mode in which heat is absorbed from the outdoor heat exchanger and a waste heat recovery heating mode in which heat is absorbed from the refrigerant - heat medium heat exchanger, and at the time of switching from the outside air heat absorption heating mode to the waste heat recovery heating mode, the control unit performs control to close the first electronic expansion valve and increase the degree of refrigerant overheating downstream of the refrigerant - heat medium heat exchanger.
Inventors:
SHIMIZU NOBUTAKA (JP)
Application Number:
PCT/JP2022/013271
Publication Date:
September 29, 2022
Filing Date:
March 22, 2022
Export Citation:
Assignee:
SANDEN ADVANCED TECH CORPORATION (JP)
International Classes:
F25B27/02; B60H1/22; F25B1/00
Foreign References:
| JP2020050155A | 2020-04-02 | |||
| JP2018140720A | 2018-09-13 | |||
| JP2011105150A | 2011-06-02 | |||
| JP2004182203A | 2004-07-02 | |||
| JP2020034228A | 2020-03-05 | |||
| JP2019209938A | 2019-12-12 |
Attorney, Agent or Firm:
EBISU INTERNATIONAL PATENT OFFICE (JP)
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