US 12,103,360 B2
Vehicle-mounted air conditioner control device, and vehicle
Hidetaka Sato, Tokyo (JP); Tomoyasu Osaki, Tokyo (JP); Keiji Nagasaka, Tokyo (JP); and Ryota Kojima, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP)
Appl. No. 17/053,150
Filed by MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP)
PCT Filed Apr. 19, 2019, PCT No. PCT/JP2019/016827
§ 371(c)(1), (2) Date Nov. 5, 2020,
PCT Pub. No. WO2019/235085, PCT Pub. Date Dec. 12, 2019.
Claims priority of application No. 2018-108747 (JP), filed on Jun. 6, 2018.
Prior Publication US 2021/0237538 A1, Aug. 5, 2021
Int. Cl. B60H 1/22 (2006.01); B60H 1/00 (2006.01)
CPC B60H 1/2218 (2013.01) [B60H 1/00278 (2013.01); B60H 2001/00307 (2013.01); B60H 1/00735 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A vehicle-mounted air conditioner control device comprising:
a heater element that is included in a, high-voltage system circuit and generates heat by power supplied from a high-voltage battery;
a microcontroller that is included in the high-voltage system circuit and controls the power supplied from the high-voltage battery to the heater element;
a water temperature sensor that is included in a low-voltage system circuit and outputs a voltage signal according to a temperature of hot water;
a first V/f conversion unit for water temperature detection that is included in the low-voltage system circuit and converts the voltage signal output from the water temperature sensor into a frequency signal; and
a first digital isolator for water temperature detection that transmits the frequency signal to the microcontroller while maintaining electrical insulation between the first V/f conversion unit for water temperature detection and the microcontroller.