JPH07225029A - Temperature controller for electric carpet - Google Patents

Abstract

PURPOSE:To control a temperature to obtain a suitable temperature of a heat collecting surface even, when a type of a carpet cover is altered according to a user's taste at the time of buying to replace it by coping with different thermal conductivity and different temperature of the surface according to a type of the cover to be used for an electric carpet. CONSTITUTION:An electric heater 2 and a first temperature sensor 3 are arranged on a carpet body 1, and a second temperature sensor 5 for self-heat generating by energization is provided at an end of the body 1. Further, a controller box 4 for containing a temperature controller and a third temperature sensor 6 for detecting a room temperature is coupled to the body 1. A set temperature of the body 1 is altered in response to a temperature difference of the sensors 5, 6 and power consumption of the sensor 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device for an electric carpet used for heating in a general household.

[0002]

2. Description of the Related Art A conventional temperature control device for an electric carpet comprises, for example, an electric heater 2 and a temperature adjusting device as shown in FIG. 4, and the current flowing through the electric heater 2 is controlled by the temperature adjusting device. The temperature control device is a temperature control lever that changes the temperature according to the user's preference,
Adjustment knobs such as dials are provided.

The temperature adjusting device detects the temperature by a temperature sensor 3 embedded in the carpet body 1 and controls the temperature of the carpet body 1 according to the setting of the adjusting knob. (See, for example, Japanese Utility Model Publication No. 59-38655).

[0004]

In the electric carpet having the above-mentioned structure, the temperature of the carpet body 1 is kept constant by the temperature sensor 3 embedded in the carpet body 1, but it is used for preventing dirt and improving cushioning property. The thermal conductivity varies depending on the type of carpet cover used, and the temperature of the heating surface also varies.

Generally, the set temperature of an electric carpet is set to about 30 to 40 ° C. in a general carpet cover, but when the kind of the carpet cover is changed at the time of replacement by the user's preference, the temperature of the heating surface changes. There was a problem that it became difficult to obtain an appropriate temperature.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, in which an electric heater and a first temperature sensor are provided in a carpet body, and electricity is applied to an end portion of the carpet body. The second temperature sensor that self-heats according to the third embodiment is further provided, and the controller box that houses the temperature control circuit and the third temperature sensor that detects the room temperature is connected to the carpet body. The set temperature of the carpet main body is changed according to the temperature difference of the temperature sensor and the power consumption supplied to the second temperature sensor.

[0007]

With the above-mentioned structure, the set temperature of the carpet main body is changed so as to match the thermal conductivity which differs depending on the type of the carpet cover.

The temperature of the second temperature sensor provided at the end of the carpet body is determined by the room temperature, the amount of power consumption supplied to the second temperature sensor and the thermal resistance of the carpet cover.

Therefore, with the above construction, it is possible to determine the thermal conductivity of the carpet cover and correct the set temperature of the carpet body, and to optimize the temperature of the heating surface.

[0010]

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

The configuration of the embodiment is as shown in FIGS. 1, 2 and 3.

A carpet body 1 has an electric heater 2 and a first temperature sensor 3, and a second temperature sensor 5 which self-heats upon energization at its end.

A controller box 4 houses a temperature control circuit 7 and a third temperature sensor 6 for detecting the room temperature, and is connected to the carpet body 1.

A power switch 8 is connected to one end of the temperature control circuit 7.

A relay drive circuit 9 is connected to the output terminal of the temperature control circuit 7 and drives the relay 12.

A carpet cover 10 covers the entire surface of the carpet body 1.

Next, the operation of the above configuration will be described.

When the room temperature is RT, the power consumption of the second temperature sensor 5 is WH, and the thermal resistance of the carpet cover 10 is RK, the temperature TS of the second temperature sensor 5 can be expressed by the following equation.

TS = a × WH × RK + RT a; Constant Accordingly, the thermal resistance of the carpet cover 10 is calculated, and the set temperature of the carpet body 1 is corrected accordingly.

The correction temperature amount ΔT is given by the following equation.

ΔT = b × TS b; constant

[0022]

As described above, according to the present invention, even if a carpet cover having a thickness different from that conventionally used due to replacement or the like is used, the carpet main body can be used depending on the thermal resistance of the carpet cover. The temperature of is automatically switched, and there is an effect that an appropriate heating temperature can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a temperature control device for an electric carpet showing an embodiment of the present invention.

FIG. 2 is a circuit diagram of a temperature control device for an electric carpet showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts of a temperature control device for an electric carpet showing an embodiment of the present invention.

FIG. 4 is a perspective view of a main part of a temperature control device for an electric carpet showing a conventional example.

[Explanation of symbols]

 1 Carpet Main Body 2 Electric Heater 3 First Temperature Sensor 4 Controller Box 5 Second Temperature Sensor 6 Third Temperature Sensor 7 Temperature Control Circuit

Claims (1)

[Claims] 1. A second temperature at which an electric heater (2) and a first temperature sensor (3) are provided on a carpet body (1), and an end portion of the carpet body (1) self-heats when energized. A controller box (4) including a sensor (5) and a temperature control circuit (7) and a third temperature sensor (6) for detecting room temperature was connected to the carpet body (1) and provided. In a temperature control device for an electric carpet, the carpet according to the temperature difference between the second temperature sensor (5) and the third temperature sensor (6) and the amount of power consumption supplied to the second temperature sensor (5). Temperature control circuit (7) for changing the set temperature of the body (1)
Is connected to an electric heater (2), a temperature control device for an electric carpet.