JP2525111Y2 - Electric carpet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric carpet, and more particularly, to an electric carpet having power consumption switching means.

[Conventional technology]

2. Description of the Related Art Conventionally, electric carpets are configured so that not only the entire surface is warmed but also a part thereof is heated. That is,
As shown in FIG. 5, for example, a carpet 1 having a size of two tatami mats is divided into two sections, a first section A and a second section B, and heating lines HA and HB are attached to the sections, respectively. The first section A alone, the second section B alone, or the entire area can be selected.

That is, the heating wires HA and HB are connected in series to the changeover switches SW1 and SW2, respectively, as shown in the figure, and the other end is connected in parallel to the relay RY-K. It comprises a control circuit connected in parallel and a safety circuit provided with a thermofuse TF for shutting off the power supply when the temperature rises abnormally.

The control circuit is a circuit for controlling the temperature of the electric carpet 1. The controller 2, which is a hybrid IC, controls the resistance R 1 by a signal current flowing through the signal line SI of the thermistor 4.
Is configured to control the solenoid RY by detecting the voltage generated in the solenoid. The safety circuit consists of a fusing signal line HS and a heating resistor R provided in parallel with the heating wires HA and HB via a thermoplastic resin.
H, when the temperature of the electric carpet 1 rises abnormally, the resin melts and the heating lines HA, HB and the signal line HS
Short-circuits and blows the thermofuse TF. The thermistor wire 4 is provided with a changeover switch SW in order to compensate for a temperature error when using either the first section A or the second section.
1. When the switch SW2 is switched to the terminal b, the compensation resistor R2 is short-circuited.

Generally, a heating wire of about 300 W is used to warm the area of one tatami mat. Therefore, for 2 tatami mats, 60
The power consumption is 0W.

[Problems to be solved by the invention]

By the way, recently, various home appliances such as electronic ovens and large-sized televisions have become widespread. Depending on the contract current capacity of one house, the ratio of the current flowing through the electric carpet has become too large, and Unless one of the uses is stopped or the electric carpet is stopped for one tatami mat, there is an inconvenience that the breaker operates.

The present invention has been made in view of the above problems, and an electric carpet that can reduce power consumption when heating the entire surface with a simple operation and that can heat only half of the surface. It is intended to provide.

[Means for solving the problem]

In order to achieve the above object, the configuration of the electric carpet of the present invention divides the carpet into two sections, arranges a first heating line in one section, and a second heating line in the other section. A first switch is connected to one end of one heating wire, a second switch is connected to one end of the second heating wire, and the other ends of the first and second heating wires are connected to a changeover switch. Connected to the same switching terminal, and connected via a fuse to the other switching terminal of the changeover switch and one of the terminals of the first and second switches to which the heating wires are connected, and The first and second switches are connected to one pole of the power supply, and the changeover switch is connected to the other pole of the power supply.

〔Example〕

Hereinafter, the basic configuration of the heating line switching of the electric carpet 1 of the present invention will be described with reference to FIG. The same members as those described with reference to FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted. In the figure, the first section A of the electric carpet 1 has the first
The heating line HA is arranged, and the second heating line HB is arranged in the second section B. The first heating wire HA is connected to the parallel side terminal 8 of the changeover switch 6.
And one end of the second heating wire HB are connected in parallel, and the other end is connected to the first heating wire HB as shown in the figure.
A first switch SWa is connected to HA, and a second switch SWb is connected to the second heating line HB. Note that 12 in the figure is a 100 V commercial power supply, and PL is a pilot lamp.

When the entire surface of the electric carpet 1 of FIG. 1 is warmed, the changeover switch 6 is connected to the parallel terminal 8 and the first
The switch SWa may be turned off and the second switch SWb may be turned on. When the electric carpet 1 is warmed up, the changeover switch 6 is switched to the series terminal 10 and the first switch SWa is turned off, the heating wires HA and HB are connected in series and the current is reduced to 1/4. Even if electric appliances such as a range are used at the same time, the current can be kept within the contracted current capacity. When only the first section A or the second section B is used, the changeover switch 6 may be connected to the parallel terminal 8 and one of the first switch SWa and the second switch SWb may be turned on.

The following table summarizes the combinations of the above switch operations.

The basic configuration of FIG. 1 described above does not take any safety measures. Therefore, an embodiment in which safety measures are taken will be described with reference to FIG. That is, FIG.
And a thermistor wire 4 for detecting the carpet temperature. For this purpose, switches similar to the changeover switches SW1 and SW2 shown in FIG. 1, that is, the first switch SWa and the second switch SWb are used, and the changeover switch 6 is used.
1 except that a fuse 14 was interposed between the series side terminal 10 and the terminal b of the first switch SWa.

The fuse 14 is for switching the changeover switch 6 to the series terminal 10 side and for avoiding the danger of a short circuit when the first switch SWa is changed to the terminal B.

That is, when the power supply is short-circuited due to a malfunction of the switch, the fuse 14 is blown immediately, and an accident such as an operation of a breaker or damage to an electric carpet can be prevented. Moreover, even if the fuse is blown, the electric carpet can be used in one section or in parallel connection, and can continue heating.

3 and 4 are schematic diagrams showing an example of a slide switch used in the circuit of FIG. The changeover switch 6, the first switch SWa, and the second switch SWb are all configured by micro switches. In the figure, each switch
6, the levers 12 of SWa and SWb are contact points (not shown) when pressed by the operation lever 22 of the slide switch 15.
8, 10 or a and b are switched. Slide switch 15, as shown in FIG. 4, operation of pressing the sliding portion 20 and a lever 12 which moves by being guided to the slit-shaped guide 18 formed between the controller upper case 16 ₁ and the controller lower case 16 ₂ It consists of a lever 22.

Then, the changeover switch 6 is, as shown in FIG.
The first switch SWa is disposed at a position farther from the second switch SWb by a predetermined length Δ. Therefore, when the operation bar 22 is moved to the first switch SWa side, first, the lever 12 of the first switch SWa is pushed to switch the contact b to a, and then the contact 8 is switched to 10. Therefore, there is no danger that the contact 10 of the changeover switch 6 is closed while the contact b of the first switch SWa is closed. That is, fuse 14
Indicates that the switch has failed and the operating lever 22 is
This is to ensure safety against an abnormal situation such as when the contact b does not switch to a in spite of pressing the lever 12 of a.

In FIG. 3, the changeover switch 6, the first switch SW
The operation of a and the second switch SWb is performed as follows. That is, the operation lever 22 is set to the changeover switch 6, the first switch
When the power supply is connected to the power supply without being in contact with any of the levers 12 of the SWa and the second switch SWb, the first heat generation line HA and the second heat generation line HB are connected in parallel. Next, the operation lever 22
However, when adjusted to the position where only the lever 12 of the second switch SWb is pressed, only the first heating line HA generates heat. Next, when the operation lever 22 is adjusted to a position where only the lever 12 of the first switch SWa is pressed, only the second heating line HB generates heat. Then
When the operating lever 22 moves to a position where the lever 12 of the changeover switch 6 is pressed while the lever 12 of the first switch SWa is pressed, the first heating line HA and the second heating line HB are connected in series.

Next, the results when the electric carpet shown in FIG. 2 is actually used will be described.

Heating wire HA, HB 300W each electric carpet with a normal class cover, spread out in a Japanese room, temperature control volume
When the VR was set to the “strong” scale and the slide switch 15 was switched to the parallel connection side, the room temperature was 20 ° C., and the surface temperature of the electric carpet cover reached 45 ° C. When the slide switch 15 was switched to the series connection side in this state, the cover surface temperature of the electric carpet became 37 ° C. This temperature was slightly lower than the temperature when the temperature control volume VR was connected in parallel with the "weak" scale.

When the above adjustment was performed at room temperature of 10 ° C., the cover surface temperature was 43 ° C. in parallel connection and 29 ° C. in series connection. This temperature is slightly lower than the case where the temperature control volume VR is adjusted to the "weak" scale by the parallel connection as described above, and it has been found that the heating by the series connection is sufficiently practical. Therefore, it has been found that an effective electric carpet can be provided when an electric appliance that consumes a large amount of electric power such as a large electronic oven is used at the same time, or when an electronic appliance such as a personal computer that does not like power outages is used.

[Effect of the invention]

As described above, the electric carpet of the present invention can be configured such that the heating wires divided into two sections can be connected in parallel or in series, so that the use of heating at the start of use or particularly at a cold time, and the warming up once. It is possible to reduce power consumption while taking warmth from the end, and also to heat only one of the divided sections.

Further, another switching terminal of the changeover switch,
Since one of the first and second switches is connected to one of the sides to which the heating wires are connected via a fuse, even if the power supply is short-circuited due to a malfunction of the switch, the breaker operates, a circuit failure of the electric carpet, etc. Can be prevented, and heating of one of the sections or heating of both sections by parallel connection of the heating wires can be performed continuously.

Therefore, the electric carpet of the present invention not only saves power but also uses the electric carpet while simultaneously using other electric appliances with large power consumption even in a state where the electric current of the contracted current capacity is almost full. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a circuit diagram illustrating a basic configuration of the electric carpet of the present invention. FIG. 2 is a circuit diagram showing an embodiment of the electric carpet of the present invention in which a safety circuit is incorporated in the circuit of FIG.
FIG. 1 is an overall configuration diagram of a changeover switch and a slide switch for operating first and second switches, FIG. 4 is a cross-sectional view of the slide switch, and FIG. 5 is a circuit diagram showing an example of a conventional electric carpet. 1 ... Electric carpet, 6 ... Changeover switch, 8 ...
Parallel side switching terminal, 10 ... Series side switching terminal, A ... First section, B ... Second section, HA ... First heating wire, HB ... Second heating wire, SWa ... First switch, SWb: Second switch.

Claims (1)

(57) [Scope of request for utility model registration] 1. A carpet is divided into two sections, a first heating line is arranged in one section, and a second heating line is arranged in the other section.
A first switch is connected to one end of the first heating wire, and a second switch is connected to one end of the second heating wire.
The other end of the heating wire is connected to the same switching terminal of the changeover switch, and one of the other switching terminal of the changeover switch and one of the first and second switches to which the heating wire is connected is connected. An electric carpet wherein terminals are connected via a fuse, the first and second switches are connected to one pole of a power supply, and the changeover switch is connected to the other pole of the power supply.