JPH0942696A - Bathroom heating system - Google Patents

Abstract

(57) [Abstract] [Object] An object of the present invention is to provide a bathroom heating device that is easy to install. A film 2 having a spiral-shaped metal foil 1 attached thereto and a power supply circuit 3 are provided, and a magnetic field is generated by applying a current supplied from the power supply circuit 3 to the metal foil 1 of the film 2. However, the magnetic field is used to induction-heat the bathroom composed of a metal plate, and the bathroom can be wound in a roll and handled, which facilitates installation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for heating a bathroom unit.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings. Bathing has the purpose of keeping the body clean and refreshing, and modern bathroom units are now being equipped with various devices to improve comfort in particular. Bathroom heating is one of them, and in particular, it improves comfort by heating the cold floor in winter and heating the ceiling or side walls to prevent dew condensation.

FIG. 6 shows the structure of a bathroom unit. Reference numeral 50 indicates a bathtub, 51 indicates a ceiling, and 52 indicates a floor. For example, an iron plate covered with vinyl chloride is used for the ceiling. In conventional ceiling heating, a spiral pattern is etched on a printed circuit board, and a current generated by a power supply unit is applied to the pattern to generate a magnetic field. This magnetic field links the iron plate and induces the iron plate. It is configured to be heated and heated.

[0004]

However, the above-described structure has the following problems.

(1) An induction coil for generating a magnetic field for heating the ceiling, floor and side walls by induction heating becomes very large. For example, the ceiling has an area of about two tatami mats. Therefore, in the configuration of the induction heating coil using the printed circuit board, the coil should be installed so that the coil can be installed from a narrow opening provided in the ceiling or the like. 500 mm x 300
It was necessary to divide each coil into a rectangular one having a size of about 20 mm to reduce the size of each coil. Therefore, there is a problem that it takes time and effort to connect a plurality of coils.

(2) In the conventional induction coil using the printed circuit board, the metal plate is provided to shield the magnetic field generated from the surface opposite to the surface facing the iron plate which is the object to be heated. The frequency of the current generated from the power supply is 25 kHz
Since it is about the same, aluminum was used as a metal plate for magnetic shielding, which is very difficult to be heated by induction at this frequency. However, if the aluminum plate is installed in the vicinity of the induction coil, the electrical characteristics of the induction coil will be greatly affected. Therefore, the distance between the iron plate that is the object to be heated and the induction coil is 30 mm, while the distance between the induction coil and the magnetic shielding aluminum plate is 100 mm. Therefore, there is a problem that the volume becomes very large.

(3) The conventional induction coil has a problem in that the magnetic field strength at the central portion of the spirally arranged pattern is high and the loss of the pattern is large and heat is generated.

(4) In the conventional induction coil, the magnetic field strength at the central portion of the spiral pattern is strong, and the temperature of the iron plate, which is the heated body corresponding to this portion, becomes the highest.
There was a problem that the temperature difference from the low temperature part was 20 ° C. or more and the temperature distribution was very bad.

[0009]

In order to solve the above-mentioned problems, the first bathroom heating device of the present invention comprises a film and a power supply circuit to which a metal foil having a spiral shape is attached, and the power supply A magnetic field is generated by applying a current supplied from a circuit to the metal foil of the film, and the magnetic field induces and heats a bathroom made of a metal plate.

The second bathroom heating device has a structure in which powder made of a magnetic material is mixed into the film to reduce the magnetic resistance of the film and to easily pass a magnetic field.

The third bathroom heating device is provided with slits in the spiral metal foil so that eddy current is unlikely to be generated in the metal foil.

Further, the fourth bathroom heating device has a structure in which the width of the outer part of the spiral of the spiral metal foil and the width of the inner part of the spiral are made narrower than the width of the central part of the spiral.

[0013]

[Action]

(1) The present invention has a thickness of 10 by the above-described first configuration.
Since an induction coil is formed by sticking a metal foil having a thickness of 35 to 70 μm on a film of 0 μm, the induction coil can be handled in a roll shape, and even if it has a large shape, it can be easily handled.

(2) According to the second structure of the present invention, the magnetic resistance of the film can be significantly reduced by mixing the powder of the magnetic material into the film, so that the magnetic field generated by the metal foil is reduced. It can pass through the film with small magnetic resistance and can be shielded without leaking outside.

(3) According to the third structure of the present invention, the slit can block the eddy current which tends to flow due to the action of the magnetic flux interlinking with the metal foil.

(4) According to the fourth structure of the present invention, the current density (the amount of current per unit area) is increased in the outer portion and the inner portion of the spiral with a small magnetic flux, and a relatively large amount of magnetic flux is generated. In the central portion of the spiral, the current density can be reduced to suppress the amount of magnetic flux generated, and the magnetic flux distribution of the entire induction coil can be made uniform.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 (a) and 1 (b) show the structure of a heating device of the present invention, in which 1 is a metal foil having a spiral shape and a thickness of 70 μm,
2 is a polyethylene film having a thickness of 100 μm, to which the metal foil 1 is attached. 3 is a power supply circuit. Since the tip and the end of the metal foil 1 are connected to the power supply circuit 3, the metal foil 1 is supplied with the current supplied from the power supply circuit 3. As a result, a magnetic field is generated from the spirally arranged metal foil 1, and such a heating device is, for example, as shown in FIG.
Since it is installed on the ceiling 4 of the bathroom unit as shown in,
The magnetic field interlinks with the iron plate on the ceiling, and an eddy current is generated inside this iron plate to perform induction heating.

Since this heating device is a thin sheet having a thickness of 200 μm or less even when the metal foil and the film are combined, it is possible to handle rolls having a size of 1800 mm in length and 900 mm in width, which are provided on the ceiling. Even a small opening 5 can be easily installed in the ceiling.

3 (a) and 3 (b) show another embodiment of the present invention, 6 is a metal foil having a spiral shape and a thickness of 70 μm, 7 is a polyethylene film having a thickness of 100 μm, and powder of a magnetic material. And the metal foil 6 is attached. Metal foil 6 by the current supplied from the power supply circuit
As described above, generates a magnetic field to inductively heat the ceiling of the bathroom unit.

Here, the magnetic field generated from the metal foil 6 exists on both surfaces of the metal foil. That is, the magnetic fields 8 and 9 shown in FIG. When installed on the ceiling, the magnetic field 8 interlinks with the iron plate on the ceiling, but a magnetic field is also generated in the opposite direction. If a metal tool such as pliers is left on the film 7, the metal tool may be inductively heated by the magnetic field and may be in a dangerous state. In addition, it also causes radio wave and television interference.
Therefore, in the embodiment of the present invention, the magnetic resistance of the film is made extremely small by mixing the powder of ferrite, which is a magnetic material, with the polyethylene film. Therefore, since the magnetic field concentrates and passes through the film portion having a small magnetic resistance, it is possible to prevent the magnetic field from leaking into the space. Further, since the ferrite powder has a very high resistance value, the film itself does not lose its function as an insulator.

FIG. 4 shows another embodiment of the present invention, 10 is a metal foil having a spiral shape and a thickness of 70 μm, and 11 is a polyethylene film having a thickness of 100 μm mixed with powder of a magnetic material. The metal foil 10 is attached.
As described above, the metal foil 10 generates a magnetic field by the current supplied from the power supply circuit to inductively heat the ceiling and the like of the bathroom unit. This spiral metal foil generates heat, and the rate of heat generation is large in the central portion of the spiral. This is because the central portion 12 of the spiral has a stronger magnetic field strength due to the magnetic field generated from the outer peripheral portion 13 and the inner portion 14 of the spiral, and the loss due to the action of the magnetic field increases. The action of the magnetic field is to generate a bias in the current flowing through the foil or to generate an eddy current in the foil. Therefore, in the embodiment of the present invention, by providing the slit 15 in the portion where the magnetic field strength becomes strong, the loop through which the eddy current flows is cut off. Further, by providing the slits 15, the path through which the current flows can be divided into a plurality of parts, and the bias of the current can be reduced, so that the heat generation of the metal foil can be reduced.

FIG. 5 shows another embodiment of the present invention, in which 16 is a metal foil having a spiral shape and a thickness of 70 μm, and 17 is a polyethylene film having a thickness of 100 μm, to which the metal foil 16 is attached. As described above, the metal foil 16 generates a magnetic field by the current supplied from the power supply circuit to inductively heat the ceiling and the like of the bathroom unit. As described above, the strength of the magnetic flux generated by the metal foil 16 becomes strong in the central part of the spiral, so that the temperature of the induction-heated iron plate corresponding to this also rises, and near the outer and inner parts of the spiral. The temperature rise of the corresponding iron plate part becomes low.
Therefore, in the present invention, the width of the metal foil 16 is made smaller by making the outer part of the spiral and the inner part of the spiral narrower than the central part of the spiral. As a result, the current density in the outer and inner parts of the spiral is increased and the magnetic field strength is increased, whereas the current density in the central part of the spiral is decreased and the magnetic field strength is decreased, resulting in a uniform magnetic field overall. The temperature of the induction-heated iron plate can also be made uniform.

In each of the above embodiments, the heating device is installed on the ceiling of the bathroom unit, but it may be a wall or a floor.

[0024]

As described above, according to the bathroom heating device of the present invention, the following effects can be obtained.

(1) By forming an induction coil that creates a magnetic field necessary for induction heating by sticking a metal foil having a spiral structure to a film, the induction coil can be handled as a roll and can be taken in and out even from a narrow entrance. It is easy to handle and has good workability.

(2) An unnecessary magnetic field radiated from the metal foil is formed by attaching a metal foil having a spiral structure to a film mixed with a magnetic material to form an induction coil for generating a magnetic field required for induction heating. Can be shielded by.

(3) A metal foil having a spiral structure is attached to a film to create a magnetic field required for induction heating. A slit is provided in the central portion where the magnetic field strength of the induction coil becomes strong, so that the loop through which the eddy current flows is cut off. You can Further, by providing the slit, it is possible to divide the path through which the current flows into a plurality of parts, to reduce the bias of the current, and to reduce the heat generation of the metal foil.

(4) A metal foil having a spiral structure is attached to a film to create a magnetic field required for induction heating. The width of the metal foil of the induction coil is set so that the outer part of the spiral and the inner part of the spiral are closer to the central part of the spiral. By making it narrow and dense,
While the current density in the outer and inner parts of the spiral is high and the magnetic field strength is high, the current density is low in the central part of the spiral, so the magnetic field strength is low and it is possible to make the magnetic field uniform overall. The temperature of the induction-heated iron plate can be made uniform.

[Brief description of drawings]

FIG. 1A is a plan view showing a configuration of a heating device according to an embodiment of the present invention. FIG. 1B is a side view showing a configuration of a heating device according to the embodiment.

FIG. 2 is an external perspective view showing how the heating device according to the embodiment of the present invention is attached to the bathroom ceiling.

FIG. 3 (a) is a plan view showing the configuration of a heating device according to another embodiment of the present invention. (B) is a side view showing the configuration of a heating device according to another embodiment of the present invention.

FIG. 4 is a plan view showing the configuration of a heating device according to another embodiment of the present invention.

FIG. 5 is a plan view showing the configuration of a heating device according to another embodiment of the present invention.

FIG. 6 is an external perspective view showing the configuration of a conventional bathroom unit.

[Explanation of symbols]

 1 Metal Foil 2 Film 3 Power Supply Circuit 6 Metal Foil 7 Film with Powder Made of Magnetic Material 10 Metal Foil 11 Film with Powder Made of Magnetic Material 15 Slit 16 Metal Foil 17 Film

Claims (4)

[Claims] 1. A film comprising a spirally-wound metal foil attached to the film and a power supply circuit, wherein a magnetic field is generated by applying a current supplied from the power supply circuit to the metal foil of the film. A heating device for a bathroom configured to heat at least one of a ceiling, a wall, and a floor of a bathroom made of a metal plate by induction heating. 2. The heating device for a bathroom according to claim 1, wherein powder made of a magnetic material is mixed in the film. 3. A metal foil having a spiral shape and a power supply circuit are provided, a slit is provided in the metal foil, and a magnetic field is generated by passing a current supplied from the power supply circuit to the metal foil. A bathroom heating device configured to heat at least one of a ceiling, a wall, and a floor of a bathroom formed of a metal plate by the magnetic field by induction heating. 4. A metal foil having a spiral shape and a power supply circuit are provided, wherein the width of the spiral outer portion of the spiral metal foil and the width of the inner portion of the spiral are made narrower than the width of the central portion of the spiral. To generate a magnetic field by applying a current supplied from the power supply circuit to the metal foil, and the magnetic field generates a magnetic field, and at least one of a ceiling, a wall, and a floor of a bathroom made of a metal plate. A bathroom heating system that heats one by induction heating.