JPH04110526A - Temperature regulating device for floor heater - Google Patents

Abstract

PURPOSE:To arbitrarily set a temperature in a floor heated and effectively prevent its local overheat by a method wherein the subject device comprises a temperature detection unit including a heat sensing wire arranged along a heating element of the floor heater, heat sensing switching elements connected in series with the heat sensing wire and a control circuit adapted to control a current flowing through the heating element according to an output from the temperature detection unit. CONSTITUTION:A temperature regulating device 10 consists of a temperature detection unit 16 adapted to detect a temperature at the heating wire 14 of a floor heater 12 and a control circuit 18 adapted to control a current flowing through the heating wire 14 according to an output from the temperature detection unit 16. The temperature detection unit 16 includes a heat sensing wire 24 installed in a zigzag form along the heating wire 14 and thermostats 26 which work as heat sensing switching elements and which are connected in series with the heat sensing wire 24. Accordingly, a temperature to be controlled in the floor heater 12 can be arbitrarily set in the control circuit 18 and, further, since the thermostats 26 shut off the temperature detection unit 16 in the case of the local overheat of the floor heater 12, the control circuit 18 operates in the same manner as the breakage of the heat sensing wire 24 to interrupt the current flowing through the heating wire 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in a temperature control device for a floor heater, such as an electric floor heating device, an electric carpet, or an electric heating mat. .

[Conventional technology]

In the prior art, heat sensitive wires or thermostats alone are used to regulate the temperature of floor heaters.

Heat-sensitive wire temperature control! ! The system consists of a heat-sensitive wire laid along the heat-generating wire and a control circuit that receives the output from the heat-sensitive wire and controls the energization of the heat-generating wire. The energization of the heating wire is controlled via the control circuit.

On the other hand, a thermostatic temperature control device consists of a thermostat that is directly connected to a heating wire, and detects the temperature of the heating wire to shut off the heating wire.

[Invention or problem to be solved]

Conventional heat-sensitive wire temperature control devices can set the control temperature arbitrarily by controlling the energization of the heat-generating wire in response to changes in impedance due to heat sensitivity from the heat-sensitive wire or the heat-generating wire. , local overheating is difficult to detect;
There was a drawback caused by localized temperature or overheating parts.

Also, with thermostatic temperature control devices, is it possible to effectively prevent local overheating using the thermostat?
In addition to not being able to set the temperature to an arbitrary value, thermostats required high voltage and large capacity because they directly cut off the power to the heating wires, making them expensive.

An object of the present invention is to avoid the above-mentioned drawbacks, to be able to set the temperature arbitrarily, to effectively prevent local overheating, and to use low-voltage, small-capacity components at low cost. An object of the present invention is to provide a temperature control device for a floor heater that can be obtained.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a temperature control device for a floor heater that controls the energization of the floor heater to adjust the temperature. Provided is a temperature control device for a floor heater, comprising: a temperature detection section including a heat-sensitive switch element connected in series with a temperature detection section; and a control circuit that controls energization of a heating element based on the output of the temperature detection section. It is something to do.

(Function) In this way, since the temperature is detected by combining the heat-sensitive wire and the heat-sensitive switch element, normal temperature control can be carried out by changing the impedance of the heat-sensitive wire, and the operation of the heat-sensitive switch element can also be adjusted. Local overheating can be effectively prevented by detecting local overheating by changing the impedance of the heat-sensitive wire.Also, since the heat-sensitive switching element is connected in series with the heat-sensitive wire rather than the heat-generating wire, low voltage, It can be of small capacity, and therefore the device can be provided at low cost.

〔Example〕

Embodiments of the present invention will be described in detail with reference to the drawings.
2 and 2 show a temperature control device 10 for a floor heater according to the present invention. section 16 and this temperature detection section 1
4, and a control circuit 18 that controls the energization of the heating wire 14 based on the output of the heating wire 14. The floor heater 12 is particularly
As can be seen from the figure, it has a heat insulating material 20 for housing one heating wire 14 and a surface material 22.

The temperature detection unit 16 includes a heat-sensitive wire 24 which is similarly laid in a meandering manner along the heat-generating wire 14, and a thermostat 26 as a heat-sensitive switch element connected in series to the heat-sensitive wire 24. In the illustrated embodiment, one end of the heat sensitive wire 24 is connected to one input terminal 30 of the control circuit 18 via the bent wire 28.
The other end of the heat sensitive wire 24 is connected to a plurality of thermostats 26 via a thermostat reed wire 32,
The end of this thermostat wire 32 is connected to the wire 2
8' to the other input terminal 30° of the control circuit 18. In addition, the heat sensitive wire 24 and the thermostat 26
are arranged so as to be sensitive to heat from the heating wire 14. Further, the heat-sensitive wires 24 do not meander in accordance with the meandering pitch of all the heat-generating wires 14, but are arranged every few pitches.

Next, the operation of the temperature control device for a floor heater according to the present invention will be described.
It receives a predetermined impedance output generated by receiving heat from the heating wire 14, and controls energization of the heating wire 14 with a preset control output corresponding to this impedance output. Therefore, the control temperature of the floor heater 12 can be set arbitrarily within the control circuit 18.

In addition, since the thermostats 26 are scattered along the heat-generating wire 14, the control circuit 18 is similar to the WfIwA of the heat-sensitive wire 24 in order to shut off the thermostat 26 or the temperature detection section 16 due to local overheating of the floor heater 12. works,
The power supply to the heating wire 14 is cut off.

It can be seen that the thermostat 26 is not connected in series to the heat generating wire 14, but is connected in series to the heat sensitive wire 24 through the low voltage temperature sensing section 16, so that a low voltage, low capacity one is sufficient.

In the above embodiment, the plurality of thermostats 26 may be connected to one long heat-sensitive wire 24 via the thermostat word line 32, or may be connected in series between the plurality of heat-sensitive wires 24. . Further, the thermostat 26 may be used as the heat-sensitive switching element, or other forms such as a thermal reed switch may be used. Furthermore, the heating element may be something other than a heating wire.

(Effects of the Invention) According to the present invention, as described above, temperature can be detected by combining a heat-sensitive wire and a heat-sensitive switch element, and normal temperature control can be performed by changing the impedance of the heat-sensitive wire. Moreover, local overheating can be detected and effectively prevented by the operation of the heat-sensitive switch element and the change in impedance of the heat-sensitive wire. Furthermore, since the heat-sensitive switching element is connected in series with the heat-sensitive wire rather than the heating element, it can be of low voltage and small capacity, and therefore the device can be provided at low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic system diagram of a temperature control device for a floor heater according to the present invention, and FIG. 2 is a partially enlarged sectional view of the device shown in FIG. 1. 10------ Floor heater temperature control device 12---
--Floor heater l 4--1-Heating wire, l 6-
-----Temperature detection section, 18-111 control circuit, 24--
--1 heat-sensitive wire, 26---- thermostat.

Claims (1)

[Claims] A temperature control device for a floor heater that controls energization of the floor heater to adjust the temperature, which includes a heat-sensitive wire disposed along a heating element of the floor heater and a heat-sensitive switch element connected in series to the heat-sensitive wire. A temperature control device for a floor heater, comprising: a detection section; and a control circuit that controls energization of the heating element based on the output of the temperature detection section.