JPS60148079A - Sheet heater for vehicle - 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 The present invention relates to a seat heater for a vehicle that heats the seats of an automobile or the like.

Structure of conventional example and its problems Fig. 1 shows a vehicle seat equipped with a seat heater, 30 is a seat, 31 is a back, and the back 31 and the seat 30 are each equipped with a heater unit. 25 and 29 are provided, and an automatic temperature controller 21 is attached to the heater unit 25.

Fig. 2 shows the configuration of a conventional seat heater unit 25, in which 23 and 24 are flexible supports such as cloth, and the heat generating units 23 and 24 are arranged in a meandering manner inside the two pieces pasted together. An automatic temperature controller 21 such as a thermostat is attached to the body 22, and a terminal cord 26 is connected.

FIG. 3 shows the electrical circuit of the conventional seat and back heater units 25 and 29, in which a power supply 32 such as an automobile battery is connected to a "strong" switch 27 to connect each heater unit 25 and 25. It is configured to be energized at .29.

Here, when the changeover switch 27 is turned on (in the direction shown in the figure), the heating element 2 of the seat and back heater unit 25.
2 and 28 are respectively connected in parallel to the power supply 32. When the selector switch 27 is set to 1, the heating elements 22 and 28
are connected in series and connected to the power supply 32. Incidentally, 21 is an automatic temperature controller that detects the temperature of the seat heating element 22 and opens and closes the energizing circuit of the seat heating element 22.28''-.

Such conventional seat heaters have the following problems.

(1) Heater unit) The temperature range is 25.29.

Heating elements 22 on the seat and back to adjust to "low".
A changeover switch 27 was required to switch between parallel connection and series connection of 28 to the power supply 32.

(2) Also, when the changeover switch 27 is in the "strong" position and the automatic temperature controller 21 is turned off, the energizing circuit to the heating elements 22 and 28 on the seat and back opens and the automatic temperature controller 21 is turned back on again. Time until heater uniso) 25.2
9 is not energized at all, and the automatic temperature controller 21 is turned on and off.
There was a drawback that the range of temperature change during FF operation was large, and the heating effect was significantly impaired in actual use.

OBJECTS OF THE INVENTION The present invention takes into account the problems of the conventional two-way connection and automatically adjusts the temperature of the heating section to "strong" and "strong" without using a changeover switch to adjust the temperature.
At the same time as switching to "weak", the automatic temperature controller is turned off.
The object of the present invention is to provide a vehicle seat heater which has a configuration of a heater unit such that a heating effect of 1" is always obtained even in F operation, and which does not impair the heating effect during actual use.

Structure of the Invention In order to achieve the above object, the present invention consists of heater units for the seat and the back including a plurality of heating elements.The heating elements of each lower heating unit are connected in parallel to the power supply and One end of the heating element for the seat part and one end of the heating element for the back part are individually connected in series, and an automatic temperature controller is connected to the circuit of the series-connected heating element for the seat part and the back part. It is.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a perspective view showing a seat heater unit 7 to which the present invention is applied, in which two heating elements 2 and 3 are each held by supports 4 and 5 such as cloth, and a back heater unit (not shown) is shown in FIG. A terminal cord 6 leads out the connection to a power supply (not shown) and a power supply (not shown). Further, the automatic temperature controller 1 is connected in series to the circuit of the heating element 3.

FIG. 5 shows an example of the electric circuit for the seat back according to the present invention, in which the seat and back heater units 7 and 8 each consist of two heating elements 2 and 3 and 9 and 10; are connected in series with each other, and the other end is connected in series with the power supply 11. Further, the automatic temperature regulator 1 is connected in series to the series circuit of the heating elements 3 and 10, and is turned on when detecting the temperature of the heating element 3 for the seat.

This is a configuration that performs an OFF operation.

In the circuit shown in FIG. 5, when the automatic temperature controller 1 has not reached the OFF operating temperature, power is supplied from the power source 11 to each of the heating elements 3, 10 and 2, 9 to warm the seat and back. When the temperature of the automatic temperature controller 1 rises by energizing the heating element 3 and reaches the OFF operating temperature,
The energizing circuit to the heating element 3゜10 is opened and the heating elements 3 and 10 stop generating heat, but the energizing circuit to the heating element 2 and 9 is connected to the power source 11.
Since the automatic temperature controller 1 is directly connected to the automatic temperature controller 1, the power is supplied as is regardless of the operation of the automatic temperature controller 1.

In other words, by setting the heating element 2.9 to a heat generating capacity equivalent to the "weak" state in a conventional heater unit, even if the automatic temperature controller 1 is turned off, the current supply circuit to all the heating elements can be maintained. heating elements 2 and 9 without opening.
Since the power is supplied to the power supply, the setting is automatically switched to the "weak" setting.

FIG. 6 shows an example of a configuration in which automatic temperature regulators 1a and 1b are individually connected to the circuits of the seat and back heating elements.

In this case, the automatic temperature controllers 1a and 1b are set to different operating temperatures (for example, the OFF operating temperature is 40°
50°C and 50°C), the automatic temperature controller with a lower operating temperature (for example, 1a) opens and closes the circuits of the heating elements 3 and 10 and automatically switches to the "low" setting temperature. In the unlikely event that the automatic temperature controller 1a has a short-circuit failure, the automatic temperature controller 1b can function as a protector to prevent abnormal overheating by turning off.

Effects of the Invention As described above, according to the present invention, the following effects can be achieved by configuring a seat and back heater unit consisting of a plurality of heating elements and connecting an automatic temperature controller in series to the circuit of the heating elements. can be obtained.

(1) Unlike the conventional example, since the temperature of the heating section of the seat and back can be set to "strong" or "weak", there is no need for a changeover switch for connecting the heating element in parallel and series to the power supply.

In other words, by configuring a heater unit consisting of multiple heating elements, and opening and closing the circuits of the heating elements corresponding to "strong,""medium," and "weak" sequentially using an automatic temperature controller, a changeover switch can be avoided. Temperature switching can be performed automatically even when

(2) When the automatic temperature controller turns off like in the past, all the circuits of the heating elements in the seat and back part open, and no electricity is applied at all until the automatic temperature controller reaches the return temperature again, so the heating section It is possible to eliminate the disadvantage that the temperature range becomes large, which significantly impairs the heating effect.

In other words, since the circuits of multiple heating elements are independent,
Since the circuit of one of the heating elements is always energized, the range of temperature change in the heating section is reduced, and the heating effect during actual use can be enhanced.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a vehicle seat equipped with a seat heater.
The second tooth is a perspective view of a conventional seat heater unit, FIG. 3 is an electric circuit of a conventional heater unit, FIG. 4 is a perspective view of a seat heater unit according to an embodiment of the present invention, and FIG. 6th
The figure is an electrical circuit diagram of a heater unit according to an embodiment of the present invention. 1, Ia, 1b ・・Automatic temperature controller, 2,3°9.1
0 - Heating element, 7 - Seat heater unit, 8 Back heater unit - 111 power supply. Name of agent: Patent attorney Toshio Nakao and one other name
1 Figure 3 2 27 Figure 4 Figure 5

Claims (2)

[Claims] (1) Consists of a seat heater unit and a back heater unit each having multiple heating elements.The heating elements of each heater unit are connected in parallel to the power supply, and one end of the seat heating element and the back heating element are connected in parallel to the power supply. A seat heater for a vehicle, which is individually connected in series, and an automatic temperature controller is connected in series to a circuit of a heating element of the heater unit. (2) The vehicle seat heater according to claim (1), wherein an automatic temperature control device is connected in series to the circuits of the individual heating elements of the seat and back heater units.