Abstract: A method of controlling a vehicle thermal management system includes determining, by a controller, a vehicle required heat amount based on an amount of heat required for cabin heating and an amount of heat required for battery warming-up when a heating, ventilation, and air conditioning (HVAC) subsystem operates in a heating mode; controlling, by the controller, operations of the HVAC subsystem and the coolant subsystem to minimize a work quantity of a compressor of the HVAC subsystem and minimize a heat release amount of a refrigerant circulating in the HVAC subsystem when the vehicle required heat amount is greater than a predetermined threshold; determining, by the controller, a heat absorption amount of the refrigerant; and increasing the work quantity of the compressor by a predetermined value when the heat absorption amount of the refrigerant is greater than the heat release amount of the refrigerant.

Abstract: Proposed in the present invention is a portable electrocardiogram device that excludes, from an electrocardiogram graph, signals that are determined to be noise to prevent a user from being alarmed by unnecessary noise, and distinguishes invalid signals from electrode signals to provide the user with accurate electrocardiogram signals and graphs. To this end, the present invention may comprise: a sensor unit; a display device; and a control unit.

Abstract: A vehicle thermal management system includes a HVAC subsystem; a power electronics cooling subsystem; a plurality of heat recovery drive components; and a controller. The controller includes a required heat calculation module to calculate a required heat quantity for a heating operation of the HVAC subsystem. The controller includes a coefficient of performance (COP) calculation module to calculate a maximum COP of the HVAC subsystem in the heating mode and a heat recovery calculation module to calculate a maximum heat recovery quantity of the HVAC subsystem and a total sum of estimated heat recovery quantities recoverable from the plurality of heat sources. The controller also includes a power determination module to determine respective amounts of power input to the plurality of heat recovery drive components based on the total sum of estimated heat recovery quantities and the maximum heat recovery quantity.

Abstract: A vehicle heating, ventilation, and air conditioning (HVAC) system includes: a compressor; an interior condenser located on the downstream side of the compressor and disposed in an HVAC case; a heating-side expansion valve located on the downstream side of the interior condenser; a water-cooled heat exchanger located on the downstream side of the heating-side expansion valve; and a controller. The controller is configured to adjust an opening degree of the heating-side expansion valve based on a temperature difference between air flowing from the interior condenser to front seats of a vehicle cabin and air flowing from the interior condenser to rear seats of the cabin. The controller is also configured to adjust the opening degree based on an amount of heat (heat release amount) transferred from the interior condenser to the air.

Abstract: A vehicle thermal management system includes a HVAC subsystem; a power electronics cooling subsystem; a plurality of heat recovery drive components; and a controller. The controller includes a required heat calculation module to calculate a required heat quantity for a heating operation of the HVAC subsystem. The controller includes a coefficient of performance (COP) calculation module to calculate a maximum COP of the HVAC subsystem in the heating mode and a heat recovery calculation module to calculate a maximum heat recovery quantity of the HVAC subsystem and a total sum of estimated heat recovery quantities recoverable from the plurality of heat sources. The controller also includes a power determination module to determine respective amounts of power input to the plurality of heat recovery drive components based on the total sum of estimated heat recovery quantities and the maximum heat recovery quantity.