A system for use with a block heater connected to an engine for pre-start heating of the engine. The system includes a power source, a relay assembly coupled to the power source, a temperature sensor, and a controller. The relay assembly, when closed, electrically connects the power source to the block heater, to thereby energize the block heater to heat the engine. The temperature sensor senses an ambient temperature indicative of a temperature of the engine. The controller is programmed to selectively activate the relay assembly to energize the block heater such that the engine coupled to the block heater is heated from the sensed ambient temperature to a target temperature at approximately a target time.

The present invention relates to an electric radiator (1) for a ventilation, heating and/or air conditioning system, comprising a heating body (2), an electrical connection interface (3) and at least one temperature measurement device (4) arranged across an air flow (6) that is able to pass through the heating body (2) and comprising at least one temperature sensor (41) and a body (42) for supporting the temperature sensor (41) extending in a transverse direction remote from the heating body (2), characterized in that the temperature measurement device (4) is electrically connected to the electrical connection interface (3) of the radiator (1) through a connection cable (5) that extends from a transverse end (420) of the body (42) for supporting the temperature sensor.

The present invention relates to a heating device (10), in particular to an electric heating device for a motor vehicle, having a heat exchanger housing (12), heat exchanger core (14) which absorbs heat at a heat input face, and a printed circuit board (20) having electronic components (16, 18) for controlling the heating device (10), wherein the printed circuit board (20) is arranged on an outer side (22) of the heat exchanger housing (12), wherein a temperature sensor (24) is arranged on a side (26) of the printed circuit board (20) which faces the outer side (22) of the heat exchanger housing (12), wherein connecting means (28) are provided which connect the temperature sensor (24) in a heat conducting fashion to the outer side (22) of the heat exchanger housing (12), and wherein the heat input face of the heat exchanger core (14) is connected in a heat-conducting fashion to the heat exchanger housing (12), with the result that a continuous short heat bridge, running through the interior of the heat exchanger housing (12), to the connecting means (28) is generated.

A radiation heating device includes: a planar heat generation layer; a heat generation portion that is provided in the heat generation layer and that generates heat by energization; a plurality of heat radiation portions that are disposed in the heat generation layer and that radiate heat transferred from the heat generation portion; a low heat conduction portion that is provided around each of the heat radiation portions and that has a lower heat conductivity than the heat radiation portions; and a contact detection unit that detects contact of an object with the heat generation layer. The radiation heating device further includes an energization amount decrease unit that decreases an energization amount of the heat generation portion when the contact detection unit detects the contact of the object with the heat generation layer.

A fuel gas-operated vehicle heater includes a burner area with a combustion chamber (60) formed in a combustion chamber housing (58). The combustion chamber housing (58) includes a circumferential wall (62) defining the combustion chamber (60) in relation to a housing longitudinal axis radially outwards and a bottom area (64) axially defining the combustion chamber (60). The bottom area (64) has a fuel gas feed chamber (116) between a first bottom wall (106) defining the combustion chamber (60) and a second bottom wall (112). A fuel gas feed line (118) opens into the fuel gas feed chamber (116). A fuel gas inlet opening assembly is provided in the first bottom wall (106) for the entry of fuel gas from the fuel gas feed chamber (116) into the combustion chamber (60).

The invention relates to an electric fluid heating device (1) comprising: at least one fluid inlet (7), at least one fluid outlet (11), at least one heating element (13), at least one first temperature sensor (21) for measuring the temperature of said at least one heating element (13), and a control module (15) of the at least one heating element (13). According to the invention, the device (1) comprises at least a second temperature sensor (23) for measuring the temperature of the fluid at the at least one outlet (11), and the control module (15) comprises at least one processing means (17, 19, 35) for: using the temperature information (T.sub.21, T.sub.23) from the temperature sensors (21, 24), and for generating a command for the at least one heating element (13) according to the temperature information (T.sub.21, T.sub.23). The invention also relates to an associated heating circuit and method for managing the temperature.

A device for determining a temperature of a resistance heating device, the device includes: a temperature sensor configured to detect the temperature of the resistance heating device; and an electronic data processing and/or control device configured to calculate a temperature change of the resistance heating device on a basis of a change in a resistance value of the resistance heating device and a relationship between the resistance value and the temperature of the resistance heating device, the electronic data processing and/or control device configured to validate the temperature of the resistance heating device detected by the temperature sensor, taking into account the calculated temperature change of the resistance heating device.

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.

A radiant heating device for producing radiant heat in a passenger compartment of a motor vehicle includes a heating surface for emitting heat radiation, a heating element for providing heating power, a first temperature sensor for detecting a first temperature in a specific spot and for providing a corresponding first temperature indication, and a second temperature sensor for detecting a second temperature on the surface and for providing a corresponding second temperature indication. In order to detect a local over-heating of the heating surface, a difference between the two temperature indications is determined. In the event of a defect, a protective operating mode is then selected.

A fuel-operated vehicle heater includes a burner area (12) with a combustion chamber (14); a fuel pump (24); and a combustion air blower (28). A pressure sensor (38) detects a feed back pressure. An actuating unit (36) actuates the fuel pump (24) with a predefined value of a pump operating variable, and actuates the combustion air blower with a predefined value of a blower operating variable. A heater process includes detecting the feed back pressure in case of a feed operating state set during the combustion operation and comparing the detected feed back pressure (P.sub.e) with an expected feed back pressure (P.sub.E) for the set feed operating state. If the detected feed back pressure deviates from the expected feed back pressure the pump operating variable is changed such that the feed back pressure changes toward the expected feed pressure and/or essentially corresponds to the expected feed back pressure.