JPH062871A - Electric carpet - Google Patents

Abstract

PURPOSE:To suppress the load current by energizing the other heater except in a desired heating region when the region gets a desired temperature and a heater in the region is de-energized. CONSTITUTION:A 1st energizing means (microcomputer) actuates a heater 2 of a central part 5 in a desired heating region, for instance, in case of full energization, among heaters 2, 3, 4 of the central part and both side parts 5, 6, 7. A 2nd energizing means (microcomputer) actuates the heaters 3, 4 of both side parts 6, 7 when the central part 5 gets a desired temperature, and the heater 2 is de-energized. Thus, the load current can be reduced while rising characteristics of an electric carpet body 1 are held, and the use of the other electric appliances simultaneously with the carpet is allowed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric carpet having improved start-up characteristics when power is turned on.

[0002]

2. Description of the Related Art In some electric carpets, each heater is arranged in a main body of the electric carpet to form a plurality of heating regions, and a desired heating region is selected from these heating regions to perform heating. The energization control for each heater of such an electric carpet is an on / off control using a relay.

By the way, energizing the heater in the entire heating area,
That is, the load current at the time of rising when the entire surface is energized is 9 A for an electric carpet of 900 W, for example, as shown in FIG. 5, and this large load current is from several minutes to several tens.
Flow for minutes. Then, when the temperature of the electric carpet body reaches the target temperature and is stable, load currents 9A and 0A alternately flow due to ON / OFF control of the relay. In addition, the energization rate at the time of stability is 50%. Further, even if one half of each heating area is heated without energizing the entire surface, the load current at the time of rising only changes from 9 A to 4.5 A, and the energization rate does not change.

On the other hand, Japanese Patent Application No. Sho 61-32429 describes a technique for alternately energizing each heater on one side of an electric carpet body. In this technique, a load current of 4.5 is applied.
Although it can be suppressed to a small value as A, the rising temperature of the electric carpet body is about three times slower than that of a normal one.

[0005]

As described above, in the electric carpet, a large load current 9A flows when the entire surface is energized. For example, when two identical electric carpets are used at the same time, the load current 18A sometimes flows. Therefore, the breaker works.

[0006] Therefore, an object of the present invention is to provide an electric carpet which can maintain the rising characteristic of the electric carpet main body to suppress the load current and can be used together with other electric appliances.

[0007]

DISCLOSURE OF THE INVENTION The present invention provides an electric carpet in which each heater is arranged in an electric carpet body to form a plurality of heating areas.

Of the heaters arranged in each heating area, the first energizing means for energizing the heater in the desired heating area and the heater for the desired heating area when the temperature in the desired heating area reaches the target temperature. It is an electric carpet that is provided with a second energizing unit that energizes a heater other than a desired heating area when energized.

[0009]

By providing such means, the first energizing means energizes the heater in the desired heating area among the heaters arranged in each heating area, and this energization causes the temperature in the desired heating area. When reaches the target temperature, the second energizing means energizes the heaters other than the desired heating area when the heaters in the desired heating area are not energized.

[0010]

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

FIG. 1 is a block diagram of an electric carpet body. This electric carpet has a power consumption of 900W,
The heaters 2, 3 and 4 are wired in the electric carpet body 1, and the heaters 2, 3 and 4 form a central surface 5 and both side surfaces 6 and 7 as heating areas. Here, the load current to each of the heaters 2, 3 and 4 is 4.5A when the heater 2 is energized and 4.5A is when the heaters 3 and 4 are both energized. Further, the temperature sensors 8, 9, 10 are wired along the heaters 2, 3, 4, respectively.

A controller 11 is provided at the side end of the electric carpet body 1, and the heaters 2, 3, 4 and the temperature sensors 8, 9, 10 are connected to the controller 11.

FIG. 2 is a block diagram of the controller 11. In the microcomputer 20, each relay 21,
22 is connected, the heater 2 of the central surface 5 is connected to the relay 21 among the relays 21 and 22, and the heaters 3 and 4 on both side surfaces are connected to the relay 22. Further, the microcomputer 20 includes a heating area changeover switch 2
3, the heating surface display 24 and the temperature setting volume 25 are connected.

The microcomputer 20 compares the target temperature set by the temperature setting volume 25 with the temperature of the electric carpet body 1 detected by the temperature sensors 8, 9, 10 and eliminates the temperature difference. It has a function of controlling the energization of the heaters 2, 3 and 4 selected by the heating area changeover switch 23 among the heaters 2, 3 and 4.

Further, when the microcomputer 20 inputs the state of the heating area changeover switch 23 and energizes the entire surface,
A heater in a desired area among the heaters 2, 3, 4 arranged on the central surface and both side surfaces 5, 6, 7; here, the heater 2
The function of the first energizing means for energizing the central surface 5 and the heater 2 on the central surface when the temperature of the central surface 5 reaches the target temperature
It has a function as a second energizing means for energizing the heaters 3 and 4 on both side surfaces when there is no energization.
Next, the operation of the apparatus configured as described above will be described with reference to the temperature control flowchart shown in FIG. (1) When power is supplied to all sides

The microcomputer 20 executes step #
1 input the state of the heating area changeover switch 23,
It is determined whether the electric carpet body 1 is entirely energized. If it is determined that the entire surface is energized, the microcomputer 20 proceeds to step # 2 to take in the temperature of the electric carpet body 1 detected by the heater temperature sensor 8 on the central surface 5, and this temperature is set by the temperature setting volume 25. Determine whether the target temperature has been reached.

If the temperature of the central surface 5 of the electric carpet body 1 has not reached the target temperature, the microcomputer 2
0 moves to step # 3 to activate the relay 21. By energizing the relay 21, the heater 2 on the central surface 5 is energized, and the temperature of the central surface 5 rises. In this case, the load current is 4.5 A as shown in FIG. 4, because the heater 2 is energized only.

When several minutes to several tens of minutes have passed in this state and the temperature of the central surface 5 rises to reach the target temperature, the microcomputer 20 shifts from step # 2 to step # 5, and both side surfaces 6, 7 The temperatures of both side surfaces 6 and 7 detected by the respective temperature sensors 9 and 10 are taken in and it is determined whether or not the temperatures have reached the target temperature. If the temperature of both side surfaces 6 and 7 has not reached the target temperature by this judgment,
The microcomputer 20 proceeds to step # 6 to stop energizing the heater 2 on the central surface 5 and start energizing the heaters 3 and 4 on both side surfaces 6 and 7. This energization raises the temperature of both side surfaces 6, 7. In this case, the combined load current flowing through the heaters 3 and 4 is 4.5A.

At this time, the microcomputer 20 executes the energization of the heaters 3 and 4 on both side surfaces 6 and 7 in step # 6, and determines whether the temperature of the central surface 5 is below the target temperature in step # 2. Deciding. When the temperature of the central surface 5 becomes equal to or lower than the target temperature as a result of this determination, the microcomputer 20 returns from step # 2 to step # 2.
3, the power supply to the heaters 3 and 4 on both side surfaces 6 and 7 is stopped, and the power supply to the heater 2 on the center surface 5 is restarted.

Therefore, when the temperature of the central surface 5 reaches the target temperature, the microcomputer 20 controls the energization of the heater 2 so as to keep the temperature of the central surface 5 at the target temperature, and energizes the heater 2. During the period when the power is cut off, the energization of the heaters 3 and 4 on both side surfaces 6 and 7 is controlled to raise the temperature of both side surfaces 6 and 7 to the target temperature.

As a result, as shown in FIG. 4, the temperature of the electric carpet body 1 rises as the power is turned on, the temperature of the central surface 5 rises to reach the target temperature, and then the temperatures of both side surfaces 6, 7 gradually. It rises to reach the target temperature. (2) When both sides are energized

In this case, the microcomputer 20
If it is determined in step # 7 that both sides 6 and 7 are not energized in step # 1, the temperature of both sides 6 and 7 detected by the temperature sensors 9 and 10 is changed to step # 5. It is taken in and it is determined whether this temperature has reached the target temperature. If the temperature of both side surfaces 6 and 7 has not reached the target temperature as a result of this determination, the microcomputer 20 proceeds to step # 6 to stop energizing the heater 2 of the central surface 5 and Energization of the heaters 3 and 4 is started. This energization raises the temperature of both side surfaces 6, 7. (3) In case of central surface energization

In this case, the microcomputer 20
If it is determined in step # 1 that the entire surface is not energized and that the side surfaces 6 and 7 are not energized in step # 8 but the central surface is energized in step # 8, the process proceeds to step # 3 and the heater 2 on the central surface 5 is energized. I do. As a result, the temperature of the central surface 5 rises.

If the temperatures of the central surface 5 and both side surfaces 6, 7 of the electric carpet body 1 are both above the target temperature, the microcomputer 20 energizes the heaters 2, 3, 4 in step # 9. Cut off.

As described above, in the above-described embodiment, when the entire surface is energized, the heater 2 arranged on the central surface 5 is energized, and when the temperature of the central surface 5 reaches the target temperature,
Since the heaters 3 and 4 of both side surfaces 6 and 7 are energized when the heater 2 of the central surface 5 is not energized, the temperature rise of the central surface 5 of the electric carpet body 1 is prioritized. The temperature of 5 can be raised to the target temperature in a few minutes to a few tens of minutes, and the load current at this time can be suppressed to a small value of 4.5 A while maintaining the same power consumption as the conventional one. Therefore, the rise of the electric carpet can be accelerated, and a large load current does not flow even when the same electric carpet and other electric appliances are used together, and the breaker does not operate.

It should be noted that the present invention is not limited to the above-mentioned one embodiment and may be modified within the scope of the invention. In the above-described embodiment, the temperature is increased by giving priority to the central surface 5, but the temperature may be increased by giving priority to both side surfaces 6 and 7 instead of the central surface 5.

The heating area of the electric carpet body is 2
In many cases, it is formed on the surface, the third surface, the fourth surface, the fifth surface, or the like. However, in the case of being formed by being divided into a plurality of heating areas, priority is given to the temperature rise of the desired heating area, and then other heating areas are given priority. The temperature may be increased.

Further, the temperature of the desired heating area is preferentially increased, and when the temperature reaches the target temperature, the temperature of the heating area around the desired heating area is increased or the heating area to be increased in temperature can be designated. You may comprise.

Further, for example, a maximum current regulating switch is connected to the microcomputer 20, and when this maximum current regulating switch is turned on, priority is given to the temperature rise of a desired heating area, and thereafter, the temperature of another heating area is increased. It may be configured to raise. Thus, a plurality of electric carpets can be used at the same time by turning on the maximum current regulation switch. Further, each target temperature may be set for each heating area.

[0030]

As described above in detail, according to the present invention, it is possible to provide an electric carpet that can maintain the rising characteristics of the electric carpet body and suppress the load current to a small level, and can be used in combination with other electric appliances. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electric carpet body showing an embodiment of an electric carpet according to the present invention.

FIG. 2 is a configuration diagram of an electric circuit of the electric carpet.

FIG. 3 is a temperature control flowchart of the electric carpet.

FIG. 4 is a diagram showing a temperature change of the electric carpet.

FIG. 5 is a diagram showing a temperature change of a conventional electric carpet.

[Explanation of symbols]

1 ... Electric carpet main body, 2, 3, 4 ... Heater, 5 ... Center surface, 6, 7 ... Both side surfaces, 8, 9, 10 ... Temperature sensor, 11 ... Controller, 20 ... Microcomputer, 21, 22 ... Relay , 23 ... Heating area selector switch, 24 ... Heating surface indicator, 25 ... Temperature setting volume.

Claims (1)

[Claims] 1. An electric carpet in which each heater is arranged in a main body of an electric carpet to form a plurality of heating areas, and a heater in a desired heating area among the heaters arranged in each heating area is energized. A first energizing means and a second energizing means for energizing the heaters other than the desired heating area when the heater of the desired heating area is not energized when the temperature of the desired heating area reaches a target temperature. An electric carpet characterized by.