Mitsubishi Heavy Industries Thermal Systems, Ltd.

Ryota Kojima

Hidetaka Sato

Keiji Nagasaka

Tomoyasu Osaki

This vehicle-mounted air conditioner control device () comprises: a PTC heater (H) that is included in a high-voltage system circuit (HV) and generates heat by the power supplied from a high-voltage battery (B); and a microcomputer () that is included in the high-voltage system circuit (HV) and controls the power supply from the high-voltage battery (B) to the PTC heater (H). This vehicle-mounted air conditioner control device () further comprises: a water temperature sensor () that is included in a low-voltage system circuit (LV) and outputs a voltage signal corresponding to the temperature of hot water; and a V/f conversion unit () that is included in the low-voltage system circuit (LV) and converts the voltage signal output from the water temperature sensor () into a frequency signal. This vehicle-mounted air conditioner control device () further comprises a digital isolator () that transmits the frequency signal to the microcomputer () while maintaining electrical insulation between the V/f conversion unit () and the microcomputer ().

Vehicle-mounted air conditioner control device, and vehicle

This on-board air conditioner control device comprises: a PTC heater which is contained in a high-voltage circuit and generates heat by means of power supplied from a high-voltage battery; a micro-controller which is contained in a low-voltage circuit and controls the power supplied to the PTC heater from the high-voltage battery; a current detection sensor which is contained in the high-voltage circuit and outputs a voltage signal indicating a value for the current flowing through the PTC heater; a V/f conversion unit which is contained in the high-voltage circuit and converts the voltage signal outputted by the current detection sensor to a frequency signal; and a digital isolator which transmits the frequency signal to the micro-controller while preserving electrical insulation between the V/f conversion unit and the micro-controller.

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Tokyo, Japan

Ryota Kojima