초록 ▼

A control device for a heater in a vehicle. The control device has a thermostatic switch to turn the heater on when the air temperature drops to a first value that is around the temperature at which the engine will just easily start. A secondary heater is provided within the device, turned on when t

A control device for a heater in a vehicle. The control device has a thermostatic switch to turn the heater on when the air temperature drops to a first value that is around the temperature at which the engine will just easily start. A secondary heater is provided within the device, turned on when the heater is turned on, to cause the switch to turn the heater off when the switch is heated by the secondary heater to a second temperature that correlates to an outside temperature at which the engine starts more easily.

대표청구항 ▼

[ I claim:] [1.] A control device for controlling a single electric block heater on a vehicle; the control device adapted to be mounted in the electric power supply to the single block heater so as to be spaced from the material heated by the block heater and to be located solely in an ambient air e

[ I claim:] [1.] A control device for controlling a single electric block heater on a vehicle; the control device adapted to be mounted in the electric power supply to the single block heater so as to be spaced from the material heated by the block heater and to be located solely in an ambient air environment when so mounted; the control device having a single switch to control electrical power to the block heater; the single switch being a thermostatic switch set to close, to turn on the block heater, when the ambient air temperature drops to a first temperature at which the vehicle engine will just start; a secondary heater in the control device turned on by the thermostatic switch, when the thermostatic switch closes to heat the thermostatic switch; and the thermostatic switch set to be opened by the secondary heater to turn off the block heater when the vehicle engine has been heated by the block heater to a second temperature at which it easily starts whereby the device cycles the block heater to keep the vehicle engine at a temperature where it will start, the cycling dependent solely on the ambient air temperature.