US 11,833,887 B2
Vehicular air conditioner
Hiroaki Kawano, Kariya (JP); Yoshiki Kato, Kariya (JP); Masamichi Makihara, Kariya (JP); Takahiro Maeda, Kariya (JP); Kuniyoshi Tanioka, Kariya (JP); Toru Okamura, Kariya (JP); and Naoya Makimoto, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Jun. 22, 2021, as Appl. No. 17/354,591.
Application 17/354,591 is a continuation of application No. PCT/JP2019/044815, filed on Nov. 15, 2019.
Claims priority of application No. 2018-244749 (JP), filed on Dec. 27, 2018.
Prior Publication US 2021/0316594 A1, Oct. 14, 2021
Int. Cl. F25B 13/00 (2006.01); B60H 1/03 (2006.01); B60H 1/32 (2006.01)
CPC B60H 1/034 (2013.01) [B60H 1/323 (2013.01); B60H 1/3227 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A vehicular air conditioner comprising:
a refrigeration cycle system including:
a compressor configured to compress and discharge a refrigerant;
a heat medium-refrigerant heat exchanger configured to cause the high-pressure refrigerant compressed by the compressor to release heat to a heat medium;
a decompressor configured to decompress the high-pressure refrigerant flowing out of the heat medium-refrigerant heat exchanger; and
a heat absorber configured to cause the low-pressure refrigerant decompressed by the decompressor to absorb heat to evaporate;
a high-temperature heat medium circuit through which the heat medium circulates such that the high-pressure refrigerant releases heat to the heat medium in the heat medium-refrigerant heat exchanger; and
a low-temperature heat medium circuit through which the heat medium circulates such that the low-pressure refrigerant absorbs heat from the heat medium in the heat absorber and the heat medium is cooled, wherein
the high-temperature heat medium circuit includes:
an air-heat medium heat exchanger configured to exchange heat between the heat medium and an air outside of a vehicle cabin;
a heater core configured to cause the heat medium to release heat to a ventilation air supplied into an air conditioning target space, the heater core being arranged in parallel to the air-heat medium heat exchanger;
a branching portion at which a flow of the heat medium is divided into a flow toward the air-heat medium heat exchanger and a flow toward the heater core;
a common passage into which the flow of the heat medium having flowed through the air-heat medium heat exchanger and the flow of the heat medium having flowed through the heater core are merged, the heat medium-refrigerant heat exchanger being arranged in the common passage;
a flow rate adjuster configured to adjust a flow amount of the heat medium toward the air-heat medium heat exchanger from the branching portion relative to a flow amount of the heat medium toward the heater core from the branching portion; and
an auxiliary heat source configured to heat the heat medium, the auxiliary heat source being located in the common passage at a position upstream of the branching portion in a flow direction of the heat medium.