JPS5975591A - Temperature controller for heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a heater temperature control device applied to an automobile seat heater device, etc., which has two-stage switching of "strong" and "weak".

Conventional Structure and Problems Generally, as shown in FIG. 2, an automobile seat heater device includes a manual switch 13 and a "power switch" in the electric circuit of the automobile battery 1o, the seat heaters 11 and 120fi on the front side and back side. ”, “Weak” selector switch 1
4 is inserted. 15 is the cushion side seat heater 1
It is installed near the heating wire 16 of No. 1 and the temperature IN of the heating wire 16 is
This is a thermostat that detects ' and opens the energized circuit.

In this circuit, when the selector switch 14il-strong is set, the heating wires 16 and 17 are connected in parallel. In this state, when the temperature of the heating wire 16 rises and reaches the set temperature of the thermostat 15, the thermostat 15 operates on the L" side,
Completely open the power supply circuit to the hack side seat heater. Here, the set temperature of the thermostat 15 is generally set at 40°C, turned off at 20°C, and
A type with a differential that turns on at ℃ is used. As a result, the thermostat) 15:',
Once the ri turns off, the contact will not return until the temperature drops to 20°C, so when the body is seated on the seat, its body temperature will keep it warm and the temperature will not drop to the contact return temperature of 20°C. Since the energization remains stopped and the energization is not started, the body is in a state of heat dissipation and the feeling of warmth becomes worse. Further, it is necessary to manually switch the selector switch 14 from "strong" to "weak" each time, which is troublesome.

Purpose of the Invention The object of the present invention is that even if the changeover switch is in the "strong" position, when the thermostat operates, the field is automatically switched to the field, and when the thermostat's temperature drops to a predetermined temperature and the contact returns, the switch is automatically switched to the "weak" position. An object of the present invention is to provide a temperature control device for a heater that can switch from "high" to "strong" again.

Structure of the Invention This invention connects a series circuit of a V- and a thermostat to a power source, connects the first and second heaters in series through the contacts of the relay, and connects the first and second heaters in series when the relay is on, and connects them in parallel when the relay is off. It was designed to connect. Therefore, when you turn on the power switch, the power is automatically set to "high" and the temperature rises, and when the thermostat turns off, it is automatically switched to "m", and each time you manually turn the power to "high".・There is no need to switch to "weak". Also,"
This solves the problem with the sense of warmth, where once the thermostat is turned off when set to ``Strong,'' electricity is not turned on unless switched to the field.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIG. In the figure, 1 is an automobile battery, and this automobile battery 1
The cushion side seat heater 4 and the back side seat heater 5 are energized through all the switching contacts 3 of the cross relay Ry. The switching contact 3 of the relay 5 has two circuits of contact, and when the manual switch f2 is set to "strong", the excitation coil of the relay Ry is excited, the contact 3 becomes the "strong" side, and the cushion side seat heater 4 and The back side seat heaters 5 are connected in parallel, and energization is started. In this state, when the temperature of the heating wire 7 rises and reaches the set temperature of the thermostat 8, the contact of the thermostat 8 opens and the relay R? Since the energization to the excitation coil is stopped, it is demagnetized, and the contacts 3 of the relay R7 return to the "weak" one rule.

When the contact point 3 of the relay Ry returns to the "weak" side, the heating wire 7 of the seat heater 4.5 is automatically switched to series connection and energized. In this state, when the temperature of the thermostat 8 decreases and reaches the return temperature of the contact, the contact of the thermostat 8 closes, and the excitation coil of the relay Ry is energized again, and the contact becomes the "strong" side. Heaters 4.5 will be connected in parallel.

Further, the manual switch 2 can be manually switched between "strong" and "weak" by using a pole double-throw switch.

Effects of the Invention The heater temperature control device of the present invention automatically switches between "strong" and "strong" when the set temperature is reached without manual switching.
Since the seat heater is switched to "low" and the seat heater is always energized, performance is improved not only in terms of operation but also in terms of the sense of warmth.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a circuit diagram of a conventional example. 1...Battery (power supply), 3...Switching contact, 4...
... Heater of seat heater CIi on the seat side), 5.
・Back side seat heater (second heater), 't...
・Heating wire, 8... Thermostat, ~... Relay Figure 1 1211 Figure 2

Claims (1)

[Claims] A power supply, first and second heaters that are powered by the power supply and generate heat, a series circuit of a relay and a thermostat connected to the power supply, and a series circuit provided in the relay to turn on the relay. and a switching contact that connects the second heater in parallel and connects the first and second heaters in series when the relay is turned off.