VEHICULAR AIR CONDITIONING DEVICE

WIPO Patent Application WO/2023/140206

A1

[Problem] To accurately estimate an outlet air temperature of a radiator and accurately control the temperature of air blown into a vehicle interior even during a heating operation using a hot gas circuit. [Solution] Provided is a vehicular air conditioning device which is provided with: a refrigerant circuit R including a compressor 2 for compressing a refrigerant, an indoor heat exchanger (radiator 4) for heating air to be supplied into a vehicle interior with the heat of the refrigerant, and an outdoor heat exchanger 7 for exchanging heat between the refrigerant and outside air; and a control device 100 for controlling the refrigerant circuit. The refrigerant circuit includes a hot gas circuit for causing refrigerant that has been discharged from the compressor to bypass the outdoor heat exchanger, go through the radiator, and flow into an intake side of the compressor. The control device is capable of executing a hot gas heating mode utilizing the hot gas circuit, and in the hot gas heating mode, a correction value, which is obtained on the basis of a saturation temperature calculated from an outlet refrigerant pressure of the radiator and an inlet-side superheat degree or outlet-side superheat degree of the radiator, is used to calculate an estimated value of an outlet air temperature of the radiator.

YAMASHITA KOUHEI (JP)
MATSUZAKI KODAI (JP)
ZHANG HONGMING (JP)
KINOSHITA TAKU (JP)

PCT/JP2023/000933

July 27, 2023

January 16, 2023

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SANDEN CORP (JP)

B60H1/22; F25B1/00

WO2014084343A1

2014-06-05

JP2018065486A	2018-04-26
JPH0648170A	1994-02-22
JP2014196017A	2014-10-16

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