JPH089546Y2 - Electric carpet - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention is provided in the corner of the carpet body containing the heating element.
An electric carpet in which a temperature control section having a temperature control circuit for controlling the temperature of the heating element is provided, and a surface material provided on the carpet body is located at a predetermined portion on the upper surface of the temperature control section. In particular, the present invention relates to a device that dissipates heat generated from an insulating power control element provided in a temperature control circuit.

<Prior Art> The general structure of an electric carpet is shown in FIGS.
As shown in the figure, the carpet body 12 with the heating element 11 built-in
And a temperature control section 13 in which a temperature control circuit for controlling the temperature of the heating element 11 is provided.

In the figure, a carpet body 12 is constructed by embedding a heating element 11 in a body surface material 14 made of wool, synthetic fibers, or a mixed spinning of these.

A case 15 made of synthetic resin that constitutes the temperature control unit 13 is attached to a peripheral corner of the carpet main body 12.
A part of the surface is covered with the main body surface material 14. Case 15
In the inside, an insulating power control element 16 for supplying power to the heating element 11 to control it, control boards 17 and 18 constituting a temperature control circuit including this power control element 16, heat generated from the power control element 16 A heat radiating plate 19 for radiating is emitted. Control board 17 and control board 18 and control board 18 and power control element 16
Are electrically connected by lead wires 20.
One end of the heat dissipation plate 19 is fixed to the power control element 16 by a screw 21, and the substantially central portion is fixed to the lower side of the upper surface of the case 15. On the other hand, on the upper surface of the case 15, a power switch 22, a temperature controller 23, etc. are arranged (FIG. 3). A thyristor, a triac, or the like is used as the power control element 16, and the temperature control method is such that power to the heating element 11 is turned on or off.
There are those that perform FF control and those that perform phase control of the amount of electric power supplied to the heating element 11.

Power switch 22 to use this electric carpet
After turning on, the operating temperature may be set by operating the temperature control unit 23. Then, the control boards 17 and 18 control the operation of the power control element 16 based on the given set temperature, and the power control element 16 energizes the heating element 11 in response to the control of the control boards 17 and 18. The main body 12 is heated to the set temperature and maintained at that temperature.

<Problems to be Solved by the Invention> In the electric carpet having the above-described structure, the power control element 16, particularly the phase control type, has a considerably high temperature during energization, and the heating plate 19 is built in the case 15. Therefore, the heat is accumulated in the case 15 and the power control element 16 is overheated, which causes the performance of the power control element 16 to be degraded or cause a failure.

In addition, it is desirable that the temperature control unit 13 is as small as possible in order to cause discomfort when touching the body even if the temperature control unit 13 is covered with the main body surface material 14, but the heat dissipation plate 19 is the case 15.
If it is built in, the case 15 is bulky and the temperature control unit 13 is difficult to miniaturize.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric carpet in which heat is prevented from being trapped in the case and the temperature control unit is miniaturized.

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a carpet body having a built-in heating element with a temperature control unit having a temperature control circuit for controlling the temperature of the heating element. A radiator for radiating heat to a power control element provided in a temperature control circuit in the temperature control section in an electric carpet in which a surface material provided in the carpet main body is located at a predetermined portion of the temperature control section. And disposing at least a part of the radiator in a position facing the surface material outside the temperature control unit, and at least a part of the radiator and the surface material facing the radiator. A heat dissipation sheet with good thermal conductivity is provided between them.

<Operation> According to the above configuration, in at least a part of the heat dissipation plate located at a predetermined portion on the upper surface of the temperature control unit, the contact state between the heat dissipation sheet and the heat dissipation plate becomes good due to the weight of the surface material, and the power control element The heat generated from the heat transfer sheet is transmitted to the heat dissipation sheet via the heat dissipation plate and is released to the outside of the temperature control unit, and does not stay in the outer shell. Further, since a part of the heat dissipation plate connected to the power control element is located outside the temperature control section, the temperature control section can be downsized accordingly.

<Example> An example of an electric carpet according to the present invention will be described below with reference to the drawings. The electric carpet referred to in this embodiment is an electric blanket, a foot warmer that is used by laying it on the floor of an electric seat or kitchen where the electric carpet is made small,
It is a concept that includes products with different names but similar to electric carpets. The same reference numerals are given to the parts having the same structure as the conventional example.

The electric carpet shown in FIGS. 1 and 2 comprises a carpet body 12 having a heating element 11 built-in and a temperature control section 13 having a temperature control circuit for controlling the temperature of the heating element 11. There is.

The carpet body 12 has a structure in which the heating element 11 is embedded in a body surface material 14 made of wool, synthetic fibers, or a mixed spinning of these.

A case 15 made of synthetic resin that constitutes the temperature control unit 13 is attached to a peripheral corner of the carpet main body 12.
A part of the upper surface is covered with the main body surface material 14. Case
A power control element 16 for supplying power to the heating element 11 to control the heat generation element 11 and control boards 17, 18 constituting a temperature control circuit including the power control element 16 are built in, and the control board 17 and the control board 18 are included. The control board 18 and the power control element 16 are electrically connected by the lead wire 20, respectively. One end of a heat radiating plate 31 is fixed to the power control element 16 by screws 21 in order to radiate heat generated from the power control element 16 during energization, and the heat radiating plate 31 extends to the outside from an opening 32 provided on the upper surface of the case 15. Is installed and located on a predetermined part of the upper surface of the case 15,
The other end of the heat dissipation plate 31 is fixed to the case 15 with a screw 21 with a gap from the upper surface of the case 15.

Then, the heat-dissipating silicon rubber sheet 33 having good heat conductivity and elasticity is provided at a position of the body surface member 14 facing the heat radiator 31.
Is attached with an adhesive.

On the other hand, on the upper surface of the case 15 exposed from the main body surface material 14, a power switch 22, a temperature controller 23, etc. are arranged (FIG. 1). As the material of case 15,
A synthetic resin that can withstand a temperature rise due to heat dissipation from the power control element 16 and the heat dissipation plate 31 is used. An insulating thyristor, triac, or the like is used as the power control element 16, and the temperature control method is to energize the heating element 11.
One that controls ON / OFF, one that controls the phase of the amount of power supplied during energization, etc. are adopted. On the upper surface of the control boards 17 and 18,
Printed wiring is formed and elements such as capacitors and resistors are arranged.

In order to use this electric carpet, it is sufficient to set the operating temperature by operating the temperature control unit 23 after turning on the power switch 22 as in the conventional one. Then, the control boards 17 and 18 are controlled by the power control element 16 based on the given set temperature.
The power control element 16 controls the energization of the heating element 11 in response to the control of the control boards 17 and 18, whereby the main body 12 is heated to the set temperature and the temperature is raised to the set temperature. Maintained. The heat generated from the power control element 16 during energization is transmitted to the heat radiating silicon sheet 33 through the heat radiating plate 31, guided to the outside of the case 15, and is radiated to the outside air through the body surface material 14.

In this embodiment, since a part of the heat dissipation plate 31 connected to the power control element 16 in the case 15 is extended between the case 15 and the main body surface material 14, heat generated from the power control element 16 is not generated. Can be quickly released to the outside air without being trapped in the case 15, and the operation of the power control element 16 can be maintained in good condition. Further, since the heat dissipation plate 31 is extended from the inside of the case 15 to the outside, the temperature control unit 13 can be downsized accordingly.

At this time, due to the weight of the main body surface material 14, the heat dissipation silicon sheet 33 brings about a better contact between the heat dissipation silicon sheet 33 and the heat dissipation plate 31, and the heat dissipation silicon sheet 33 and the heat dissipation plate 31. Since the air layer does not exist between the heat dissipation plate and the heat dissipation silicon sheet 33, the surface material 14 is directly attached to the heat dissipation plate.
The temperature inside the temperature control unit 13 is lower by about 5 ° C. as compared with the one that abuts against the heat dissipation member 31, and the heat dissipation efficiency is improved.

Furthermore, since the upper surface of the power control element 16 is covered with the main body surface material 14, when the temperature control unit 13 is in the ON state, the heat radiation plate 31 that is at a high temperature may be touched to cause burns, or the temperature control unit 13 When the heat is off, the heat sink 31 does not feel uncomfortable when touched, and the heat sink 11 does not heat the body surface material 14 on the temperature controller 13 where the heat sink 11 is wired. You can also

<Effects of the Invention> Since the electric carpet of the present invention has the above-mentioned configuration, the heat generated from the power control element can be quickly released to the outside air without being confined in the temperature control unit, and the electric power control element It is possible to keep the operation good. Also, since part of the heat sink is located outside the case of the temperature control unit, the temperature control unit should be made smaller than the conventional electric carpet in which the heat sink is completely built in the temperature control unit. Will be possible.

Further, since the heat radiation sheet is adhered to the surface material, the weight of the heat radiation sheet allows the surface material to be in good contact with the heat radiation plate and the heat radiation sheet, and an air layer is formed between the heat radiation plate and the heat radiation sheet. The heat radiation efficiency can be improved as compared with the case where the surface material is brought into direct contact with the heat radiation plate to radiate heat.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an electric carpet according to the present invention, FIG. 2 is a sectional view of the electric carpet, FIG. 3 is a perspective view showing a conventional electric carpet, and FIG. FIG. 11 ... Heating element, 12 ... Carpet body, 13 ... Temperature control part, 14 ... Body surface material, 15 ... Case (outer shell of temperature control part), 16 ... Power control element, 31 ... Heat sink , 33 …… Silicone sheet for heat dissipation.

Claims (1)

[Scope of utility model registration request] 1. A carpet body having a built-in heating element is provided with a temperature control section having a temperature control circuit for controlling the temperature of the heating element, and the carpet body is provided at a predetermined portion of the temperature control section. In an electric carpet having the surface material placed thereon, a heat radiator for radiating heat is connected to a power control element provided in a temperature control circuit in the temperature control unit, and at least a part of the heat radiator is set to the temperature above. It is arranged outside the control unit at a position facing the surface material, and a heat radiation sheet having good thermal conductivity is provided between at least a part of the heat radiation member and the surface material facing the heat radiation member. A characteristic electric carpet.