JP3385955B2 - Heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a gas, liquid, or solid
The present invention relates to an apparatus for heating a device. [0002] 2. Description of the Related Art Conventionally, a high temperature water heater such as an instant water heater is used.
When heating a gas or liquid quickly, heat with gas
The method was used. Also, when heating a solid
A sheath heater or the like has been used. [0003] SUMMARY OF THE INVENTION However, the conventional
High-speed heating of water by the heat transfer method due to the high heat density
The surface temperature exceeds the boiling point, causing local boiling and
There is a problem on the whole. Further, it is necessary to prevent local boiling from occurring.
To increase the heat exchange area, it is necessary to increase the heat exchange area.
The problem that the device becomes very large due to its structure
was there. Heating by gas combustion is performed outside the pipe.
There is also a problem that the thermal efficiency is low. [0006] Even when an electric heater is used, the power density is high.
Temperature, a local abnormal temperature rise occurs,
Due to problems such as safety and heater disconnection,
It was not suitable for boiling hot water. Further, good heat transfer can be achieved by using a sheathed heater or the like.
When heating solid material that is not desired, the part facing the heat source
However, there was a problem that the temperature was too high. In order to prevent local boiling from occurring,
Increasing the heat exchange area not only increases the size of the equipment, but also
Temperature response is poor due to the large heat capacity of the
There was a problem of becoming. Also, adsorbents such as activated carbon and zeolite are used.
Even in a heating device for heating and regeneration, the heat exchange area
It is necessary to increase the contact area with the adsorbent
However, when a conventional electric heater is used,
And regeneration efficiency is poor due to uneven temperature.
There was such a problem. [0010] Further, a heating device for heating water to generate steam.
Conventionally, because of the configuration that heats the water in the water storage tank,
Issues such as slow startup and poor energy efficiency
was there. In addition, it is configured to generate steam instantaneously.
As described above, it is necessary to increase the heat exchange area.
There was a problem that the device became large. Also, a heating device for purifying air using a catalyst.
When a conventional electric heater is used, the heat
Due to the limitation of conduction, the effective reaction area cannot be increased,
There was a problem that purification ability was poor. Further, in the conventional heating device, the overheating prevention
A thermostat or thermal fuse close to the heat source.
Need to be installed.
there were. Further, a heating device using a conventional electric heater
When hot water is produced by heating, scale builds up on the heater surface and
There was a problem that disconnection due to normal heat generation occurred. According to the present invention, there is provided a heating apparatus for solving the above-mentioned problems.
Equipment to provide heat exchange per unit volume.
Large heat exchange area and uniform heating
By heating the fluid using a heating element that can generate
When heating, to a temperature close to the boiling point without boiling
The temperature can be raised, the temperature controllability is good, and the thermal efficiency is high.
It is an object to provide a small heating device. [0015] [MEANS FOR SOLVING THE PROBLEMS]
In the present invention, at least a part is electrically closed circuit.
Formed using a conductor such as a metal,
And a heating element with an eddy current
A container to be housed, and an induction heater for induction heating the heating element.
Supplying high frequency power to the heat coil and the induction heating coil;
High frequency power supply means, and an induction heating coil
Induction heating that heats the heating element with the generated alternating magnetic field
Device, per unit volume used for heat exchange
Has a large heat exchange area and can be heated uniformly.
When heating a liquid by heating a fluid using a heating element
In this case, raise the temperature to a temperature close to the boiling point with a small-volume heating element
To provide a heating device with high heat exchange efficiency.
Can be. [0016] DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, a plate-shaped conductor is provided.
A heating element formed in a spiral structure;
Of the spirally configured conductor so as to form a closed circuitWinding
Only at the beginning and endElectrically connected to the closed circuit.
WhatUniform in the circumferential direction of the heating elementSo that eddy currents flow
Connection structure, a container for accommodating the heating element,
An induction heating coil for induction heating the heating element;
High-frequency power supply that supplies high-frequency power to the induction heating coil
And a heating element, wherein the heating element is a conductor of the closed circuit.
The total radial thickness for the spiral structure is
The magnetic flux generated when applying heat should be thinner than the skin thickness
AC magnetic field generated by the induction heating coil
And a heating device for induction heating the heating element. Thus, the high frequency power is supplied from the high frequency power supply means.
Wave power to the induction heating coil
The heating element itself is heated. Connect the heating element at this time electrically.
Units for heat exchange by making a continuous spiral
Increase the heat exchange area per product and heat evenly
Can heat the liquid when heating, small volume
The body can be heated to a temperature close to its boiling point,
The rate can be higher. Claims2Is easy to mass-produce
By stacking short heating elements in the axial direction, the length of the heating elements can be reduced.
Inexpensive variable and input power and power density can be set freely
Heating device. Claims3In the invention described in (1), the heating element is
Use conductors such as metal processed into a shapeInsulation sheet between layers
Inserted into a spiralBy contact surface with liquid
A heating device with a high heat exchange efficiency
Is showing. [0020] Example (Example 1) Hereinafter, Embodiment 1 will be described with reference to the accompanying drawings. FIG.
In 101, at least a part is an electrically closed circuit.
Is formed using a conductor such as a metal so that the closed circuit
Heating element with eddy current flowing along it, 102 generates heat
An induction heating coil for induction heating the body 101, 103
Is a high frequency power supply for supplying high frequency power to the induction heating coil.
A force supply means 104 transfers gas or liquid to the heating element.
Fluid transfer means for sending 105 is a container for storing the heating element
is there. For example, the conductor of the heating element 101 is made of stainless steel.
Board, the high-frequency power supply means 103 has an inverter circuit,
By using a pump or a fan for the fluid transfer means 104,
This configuration can be easily realized. When heating is started by a user's instruction, the fluid
Transfer means 104 supplies gas or liquid to heating element 101
I do. At the same time, the high frequency power supply
Electric power is supplied to the heating element 101 by the file 102. this
At this time, an induction heating core
High-frequency magnetic field generated by high-frequency current flowing through the
An eddy current is generated. This eddy current and the electrical resistance of the stainless steel plate
Joule heat is generated in the heating element 101 due to the resistance. This heat
When heat is transferred to a gas or liquid, the heating element
The thermal efficiency in the steady state is as high as 100%
Efficiency. FIG. 2 shows a spiral structure of the heating element 101.
You. Here 201 indicated by a solid line is a stainless steel plate.
Is electrically connected by the connection structure 202.
Have been. Stainless steel plate 201 by connection structure 202
Is shown in FIG. 2 (b) to form an electrical closed loop.
As shown in FIG.
A uniform eddy current flows in the direction. Therefore, the stainless steel plate 20
1 uniformly generates heat. In addition, the winding interval of the spiral structure is reduced.
Large heat exchange area per unit volume
A uniform heat source can be realized. Next, the thickness of the conductor will be described. Guidance
The magnetic flux generated when heating is performed is called the skin effect.
The elephant passes intensively on the surface of the conductor through which the eddy current flows. Departure
Of the generated magnetic flux, up to (1-1 / e) [e is the natural logarithm]
The skin thickness δ, which indicates the thickness passing through the conductor, is expressed as ρ,
Assuming that the angular frequency is ω and the magnetic permeability is μ, δ = (2ρ / (ω ·
μ)) ∧ (1/2). If the magnetic flux does not pass through the conductor, induction heating is performed.
Since no electromotive force is generated to generate eddy currents,
The skin thickness is a guideline for performing induction heating. Therefore, the conductor used for the heating element 101 is
The sum of the conductor thickness in the radial direction of the wound structure is the skin thickness
If it is configured to be thinner, the magnetic flux can be used efficiently
Can cause eddy currents on each turn of the vortex
it can. For example, a non-magnetic stainless steel having a thickness of 0.3 [mm]
When using metal, the skin thickness around 20 [kHz] is about 3 [m
m], so the number of spirals should be up to 10
is there. As described above, the stainless steel plate 201 has an appropriate thickness.
And an electrical closed-loop vortex using the connection structure 202.
By making a wound structure, generally available non-magnetic
A large uniform eddy current can be flowed even if the Next,As a reference for the present inventionHelical structure
Will be described. FIG. 3 shows the spiral structure of the heating element 101.
You. Here, reference numeral 301 denotes a spiral structure made of a stainless steel plate.
The connection structure 302 forms an electric closed loop. Guidance
Use a cylindrical finite length solenoid as the heating coil 102
The magnetic flux density in the axial direction is near the solenoid opening
And coarse near the center. FigureSpiral like 3
Configuration in which the start and end of the conductor are electrically connected
Because of the use of a heating element,
Since the same amount of current flows, the calorific value is uniform. By the operation as described above, heat exchange
Heat exchange area per unit volume to be provided is large and uniform heating
The fluid using the heating element 101 capable of performing
By heating the liquid, a small volume heating element
Can increase the temperature to a temperature close to the boiling point.
A high heating device. In this embodiment, the heating element 101 is made of metal or the like.
Stainless steel is used as the conductor, but eddy current is generated
It goes without saying that any conductor can be used. Also,
The figure shows a circular spiral, but an elliptical or polygonal spiral
It may be wound (Fig. 4).In the drawing, outside the heating element
The induction heating coil is placed on the side
Place it inside the heating element and above and below the heating element (Fig. 5).
Needless to say, this may be done. (Reference Example 1) Less than,Reference Example 1 Related to the Present InventionAbout the attached drawing
Will be described. FIG. 6 is a diagram illustrating a heating element 601 according to the second embodiment.
It is. The heating element 60 shown by a solid line in FIG.
1 is made of a non-magnetic stainless steel plate.
Except for the parts described above, the same functions as in the first embodiment are performed. So all
Since the body configuration is the same as that of the first embodiment, the description is omitted. For the same reason as described in the first embodiment, the circle
If the total radial thickness of the cylinder is sufficiently smaller than the skin thickness δ
In this case, the heat generation distribution becomes uniform. Therefore, as shown in FIG.
601 and increase the number of concentric circles to increase the heat exchange area
Can be widely taken. (Reference example 2) Less than,Reference example 2Will be described with reference to the accompanying drawings. FIG.
FIG. 9 is a view showing a heating element 501 according to a third embodiment. In this figure
The heating element 701 indicated by a solid line is a stainless steel plate.
It is the same as Example 1 except for the parts
Performs the same function. Therefore, the overall configuration is the same as in the first embodiment.
Therefore, the description is omitted. When the heating element is configured as shown in FIG.
The distribution of heat generated by raising the temperature of the liquid flowing through the center
As a result, a heating device with a uniform temperature distribution can be realized.
Things. That is, the heating element 7 having the configuration shown in FIG.
01 denotes a plurality of metal rings 701a to 701a concentrically arranged.
01c. Also, the innermost metal ring
701a is made of magnetic stainless steel.
c is made of non-magnetic stainless steel. With the above configuration, the configuration shown in FIG.
As shown in the figure, the most flux passing through the center of the heating element
It becomes. That is, the temperature of the liquid passing through the heating element
It is the one with the highest degree. That is, the induction heating coil
The heating element 70 is generated by a high-frequency magnetic field generated by 102.
The eddy current flowing in 1 is generated in a direction that hinders a change in magnetic flux.
You. Therefore, a large eddy current is generated in the part where more magnetic flux passes.
What happens. The magnetic permeability that indicates the ease of passage of magnetic flux is
Magnetic stainless is about 100 times that of non-magnetic stainless
ing. For this reason, non-magnetic stainless steel
A magnetic stainless steel ring 701a is provided in the rings 701b and 701c.
When enclosed, the magnetic field generated by induction heating coil 102
The bundle tries to pass through the innermost magnetic stainless steel ring 701a.
You. The length of the induction heating coil 102 corresponds to the diameter of the container 101
If it is not long enough, the induction heating coil 102
The generated magnetic flux does not become parallel to the axial direction of the container 101.
It is. That is, schematically, as shown in FIG.
Oval or parabolic. For this reason, induction heating core
The magnetic flux generated by the file 102 is a magnetic stainless steel ring 701a.
・ Linking to all non-magnetic stainless steel rings 701b and 701c
I do. For this reason, the magnetic stainless steel ring 701a
All of the tenless rings 701b and 701c generate heat, and the magnetic flux is
The calorific value of the magnetic stainless steel ring 701a that passes most easily
Also increase. In each of the above embodiments, the object to be heated was water / stone.
It is a liquid such as oil.
It can be used. (Examples)2) Examples below2Will be described with reference to the accompanying drawings. FIG.
Is an example1Heating element201FIG. In addition, dare
Except for the parts described below, the same functions as those of the first embodiment are performed.
Therefore, the overall configuration is the same as that of the first embodiment, and the description is omitted.
Abbreviate. In FIG. 9, an axial direction such as 901a-e
Heating elements with a short length are laminated in the axial direction.
The exchange area and heat generation per unit area can be set freely.
You. For example, bath or shower or hand washing
To boil water up to about 50 ° C that touches the human body
In the heating device, the number of stacked heating elements is reduced,
By reducing the product and improving the temperature controllability,
A good heating device can be realized. A heating device for boiling hot water having a boiling point close to the boiling point
The number of stacked heating elements to increase the heat exchange area.
To achieve the goal safely without boiling.
Can be. In addition, heating equipment with large input power and large flow rate
In this case, the number of stacked heating elements may be further increased. As described above, according to the present embodiment, mass production
Easy short axial heating elementLaminationThe length of the heating element
It is possible to provide a heating device that can change the
You. In this embodiment, the heating elements are laminated in five layers.
However, it goes without saying that it may be increased or decreased as necessary.
Nor. Also, what kind of heating elements are stacked
The shape is also acceptable. (Examples)3) Examples below3Will be described with reference to the accompanying drawings. FIG.
0 is the embodiment1It is a figure which shows the heating element 101 of FIG. In addition,
Except for the parts that are daringly described, the same function as in the first embodiment was performed.
You. Therefore, the overall configuration is the same as that of the first embodiment, and will be described.
Is omitted. At this time, the heating element is structured as shown in FIG.
If done, the heat exchange efficiency can be further increased. You
That is, the configuration shown in FIG.
Using conductors made of corrugated metal, etc.
It is. 1002 is a connection structure, 1003 is inserted between layers.
Insulating sheet. A conductor processed into a wave shape is used as the heating element 801.
Because it is used, rather than a plate with a spiral shape,
Heat exchange area per unit volume can be increased
Things. For this reason, it is necessary to further increase the heat exchange efficiency.
Can be done. Also, when using a conductor processed into a wavy shape
Just insert the insulation sheet 1003
Maintain proper spacing between spirals as they can be maintained properly
It does not require any ingenuity. By the operation as described above, metal or the like
Conducting corrugation on conductors makes it easy to provide an area for heat exchange
A heating device that is large in size can be realized. In this embodiment, the spiral heating of the first embodiment is used.
Although the explanation has been given with the body as an example, other shapes
It goes without saying that it does not matter. (Examples)4) Examples below4Will be described with reference to the accompanying drawings. FIG.
In 1, the spiral structure 201 is made of a stainless steel plate
, And are electrically connected by the connection structure 202. 1
Activated carbon 101 is filled in the gap between the heating elements.
Adsorb methane. Except for the parts that are daringly described
It performs the same function as in Example 1. Therefore, the overall configuration is
1 and the description is omitted. When water is passed through the heating element having the above structure, activated carbon 1
101 adsorbs trihalomethane. However, live
The adsorption power of trihalomethane of the charcoal 1101 depends on the water flow
It drops sharply. In order to recover adsorption power, activated carbon 1
Heat 101 to release trihalomethane with steam
It suffices (this action is called heating regeneration). [0051] The problem arises when heating and regenerating activated carbon.
Is ignition due to abnormal temperature rise of activated carbon. For example, figure
As shown in FIG. 12, a heater in which a lump of activated carbon is provided on the outer periphery
When heated in, try to raise the temperature to the inside of the activated carbon mass
Then, a large temperature gradient is generated vertically with the activated carbon heat source.
Live. Therefore, by increasing the input power of the heater,
When heating and regenerating by heating, the connection between heater and activated carbon
The temperature of the contact surface may rise to the ignition point of activated carbon.
is there. In this embodiment, the heating element 101 and the activated carbon 11
01 has a large contact area, making the entire activated carbon almost uniform
Can be heated. Therefore, activated carbon 1101 ignites
Efficiently heats the entire unit without raising the temperature
Can live. With the use of the heating device of this embodiment,
A water purifier capable of removing trihalomethane can be realized. By the operation as described above, the activated carbon is added.
The heat generation area per unit volume for heat is large and uniform
Heat activated carbon using a heating element capable of performing heat
By heating the activated carbon 1101 uniformly and quickly
And a heating device capable of heating. Further, in this embodiment, the heating element is removed and the removal ability is recovered.
But it can be sterilized by heating.
You. (Examples)5) Examples below5Will be described with reference to the accompanying drawings. FIG.
3 is an embodiment5FIG. Figure 13
201 is a spiral structure made of a stainless steel plate,
They are electrically connected by a structure 202. 1301 departs
Absorbs moisture with zeolite packed in the gap between heating elements
You. Except for the parts that are daringly described, the same machine as in the first embodiment is used.
Perform the function. Therefore, the overall configuration is the same as in the first embodiment.
Therefore, the description is omitted. The moist air is sent by the fluid transfer means 104.
When zeolite 1301 is removed, it absorbs the moisture of moist air.
Wear and vent dry air. However, Zeory
1301 has a limit in the amount of water adsorbed. Where moisture
To restore adsorption capacity, the zeolite must be heated above a certain temperature.
What is necessary is just to release the absorbed moisture as steam by heating
(This is called heat regeneration). The heating and regeneration of zeolite can be carried out by the conventional seed heating.
As with the conventional example 6, the problem when performing the
Heating power regeneration by increasing the input power of the
Then, the temperature of the contact surface between the heater and the zeolite becomes extremely high.
It is going to get worse. In this embodiment, the heating element 101 and the zeolite
Due to the large contact area of 1301, the entire zeolite
It can be heated uniformly. Therefore, the zeolite
Efficiently heat the entire body while keeping the temperature of the contact surface with the heating element low.
Heat can be regenerated. By the operation described above, moisture adsorption is performed.
The heat generation area per unit volume used for material heating is large,
Zeolite using a heating element that can be heated at once
Heating zeolite 1301 uniformly and at high speed
A heating device that can be heated to a predetermined temperature. (Examples)6) Examples below6Will be described with reference to the accompanying drawings. FIG.
4 is an embodiment6FIG. Figure 14
201 is a spiral structure made of a stainless steel plate,
They are electrically connected by a structure 202. 1401 departs
It is a highly water-retentive sponge packed in the gaps between the heating elements.
Note that the same functions as those in the first embodiment are performed except for the parts that are daringly described.
Fulfill. Therefore, the overall configuration is the same as in the first embodiment.
Description is omitted. The heating element is heated and the fluid is
When the transfer means 104 sends a very small amount of water to the heating element,
The dice 1401 absorbs water and stains the stainless steel regardless of the direction of the heating element.
The water is sent to the wrestling plate 201. This water is generating heat
It can be vaporized by touching the stainless steel plate to generate steam.
Can be. At this time, use a stainless steel plate
201 between the stainless steel plate 201
The water contact surface will bead up and the contact area will be small
Is preventing. Handy steam generation using the heating device of this embodiment
Generates steam in any direction without dripping when applied to a vessel
Can be done. By the operation described above, the heating element
The structure is filled with high water-retention materials in the gaps, and water is included.
While heating the heating element with the induction heating coil,
The heating element can be directed in any direction to generate steam
You. Further, the vaporized steam is further heated.
This makes it possible to generate superheated steam. (Examples)7) Examples below7Will be described with reference to the accompanying drawings. FIG.
5 is an embodiment7FIG. Figure 15
1501 is a stainless steel plate supporting a platinum catalyst.
Spiral structure, which is electrically connected by the connection structure 202.
Have been. The heating element 101 is induction-heated as in the first embodiment.
Then, the catalyst is heated to the activation temperature. Transfer here
When air is sent in by means 104, the air is
Odorous components, such as ammonia, are oxidatively decomposed. catalyst
The problem with heating conventional heaters with a conventional sheathed heater is that
As in the description of the sixth example, the input power of the heater is increased.
In order to obtain the catalytic action in a short time, the catalyst and heater surface
That is, the contact surface temperature becomes extremely high. In this embodiment, the contact area with air is large.
In addition, since the heat generation distribution can be made uniform,
Deodorizing effect and local abnormal temperature rise
High performance in deodorization.
It is possible to last. By the operation described above, the catalyst is supported.
Heating the catalyst efficiently by using the held heating element
And a heating device that can perform the heating. (Examples)8) Examples below8Will be described with reference to the accompanying drawings. Simple
In general, simply making a hole can cause turbulence
However, here, to generate larger turbulence,
As a conductor such as a metal of the heating element described in Examples 1 to 5,
A metal plate having a hole having a wing portion as shown in FIG.
The case of using is described. As a result, FIG.
As shown in FIG. 6 (b), the flow of the fluid becomes complicated and heat exchange occurs.
Increased heat exchange efficiency due to increased contact with the surface
it can. Also, the turbulent flow mixes the fluid well and the entire fluid
Is also made uniform. By the operation as described above, the heating element
A turbulence is generated in the conductor such as metal used to improve heat exchange efficiency.
The use of a metal plate with holes that allow
A heating device with further improved exchange efficiency can be provided. The shape of the hole for generating turbulence
May have any structure. (Reference Example 3) Less than,Reference Example 3Will be described with reference to the accompanying drawings. FIG.
7 is, DepartureFIG. 3 is a view showing a heating element 1701. Here 1701
This structure is easily realized by using foam metal
it can. Except for the parts that are described, the same as in the first embodiment
Perform the function of Therefore, the overall configuration is the same as in the first embodiment.
Description is omitted because there is. The foam metal is porous gold as shown in FIG.
Group, which increases the heat exchange area when performing heat exchange with fluid.
Can be heard. There are also many holes
Therefore, the heat exchange efficiency due to turbulence is also improved. Where the ring
The total amount of metal in the radial direction is about the skin thickness described above.
By taking the thickness a in the radial direction so that
It can flow evenly. If such a metal is used,
The heating element can be processed only by cutting. This embodiment
If the heating device is applied to the steam generator, the contact surface with water
To prevent water from beading up and reducing the contact area
Can be. As described above, a porous metal conductor
By configuring the heating element, a heating element that is easy to process
A thermal device can be realized. (Examples)9) Examples below9Will be described with reference to the accompanying drawings. What
Note that, except for the parts that are daringly described, the same functions as in the first embodiment are performed.
Add Therefore, the overall configuration is the same as in the first embodiment,
Description is omitted. In FIG. 18A, reference numeral 1805 denotes a spiral
There is no stainless steel as in the center of the
1806, a container configured to prevent fluid from passing through
Is a water purifier and 1807 is a ferromagnetic material. In addition, water purifier 1
806 is a container filled with a hollow fiber membrane or activated carbon,
This structure can be easily made by using ferrite for 807.
realizable. As shown in FIG. 18, a container 1805 is used
Do not allow water to pass through parts of the heating element that have no conductors, such as metal.
The fluid that does not touch the heating element
Wear. This can improve heat exchange efficiency
You. Also, by utilizing this hollow portion, as shown in FIG.
Hot water supply using water as fluid by inserting water purifier 1806
Use hot water suitable for drinking when used as a container
Can be. Further, as shown in FIG.
By placing the ferromagnetic material 1807 in the hollow part, the magnetic flux density
And the induced electromotive force increases. This allows induction heating
Reduce the current in coil 102 or reduce the number of turns
be able to. To reduce the current in the induction heating coil
If possible, reduce circuit loss in high-frequency power supply means
be able to. Also, reduce the number of turns of the induction heating coil.
If possible, reduce the resistance of the induction heating coil,
To reduce the loss due to Joule heat of the heating coil itself
Can also be. By the operation as described above, heat exchange
Use a container configured so that fluid does not pass through
Not only improve heat exchange efficiency, but also
Can be used to purify water and improve thermal efficiency.
The heating device can be provided. (Examples)10) Examples below10Will be described with reference to the accompanying drawings. What
Note that, except for the parts that are daringly described, the same functions as in the first embodiment are performed.
Add Therefore, the overall configuration is the same as in the first embodiment.
Description is omitted. In FIG. 19, 201 is stainless steel
Reference numeral 1901 denotes a connection structure using a thermal fuse. When heat exchange by induction heating is performed, for example,
If water for heat exchange is not sent,
The temperature of 101 becomes very high. At this time, the heating element 101
Temperature so that the temperature of the
Temperature fuse that blows at a temperature lower than the
By setting up a continuous structure, abnormal temperatures caused by emptying
When the thermal fuse is blown when rising, it follows the conductor winding direction.
The electric circuit is cut off and the current stops flowing. Eddy current flows
Otherwise, the heating element 101 will not be able to generate heat.
The connection structure can be used as an effective safety device. The operation described above causes the temperature to rise.
Safety equipment that cannot restore the components of the heating element when it becomes too hot
It is possible to provide a heating device having a function of operating as a heater. Note that, instead of the connection structure using the thermal fuse,
Use a bimetal that cuts off the circuit when the temperature rises
If so, it can be a safety device that can be restored. (Examples)11) Examples below11Will be described with reference to the accompanying drawings. What
Note that, except for the parts that are daringly described, the same functions as in the first embodiment are performed.
Add Therefore, the overall configuration is the same as in the first embodiment.
Description is omitted. In FIG. 20, 2001 indicates a temperature rise.
Resistance characteristic change metal plate showing positive resistance change against
21) and 202 are connection structures. When the heat exchange by induction heating is performed, FIG.
The Curie point temperature at which the resistance change occurs abruptly as in
A metal plate 200 having a desired temperature (for example, 95 [° C.])
1, the temperature of the heating element 101 is higher than 95 [° C.].
In this case, the resistance value of the metal plate 2001 becomes very large.
Therefore, the eddy current can be made hard to flow. Eddy current
If the heat generation amount decreases, the heat generation amount of the heating element also decreases.
The temperature of 01 drops. The temperature of metal plate 2001 drops
In this case, heating is performed again to return to the original resistance value.
You. By the operation as described above, automatically
A heating device having a function of controlling temperature can be provided. (Examples)12) Examples below12Will be described with reference to the accompanying drawings. What
Note that, except for the parts that are daringly described, the same functions as in the first embodiment are performed.
Add Therefore, the overall configuration is the same as in the first embodiment.
Description is omitted. In FIG. 22, 2201 is shape memory
The alloy plate 2202 has a flexible connection structure. In this embodiment, the temperature is set to a predetermined value (for example, 95
[° C.]), as shown in FIGS. 23 (a) to 23 (b).
The shape memory alloy plate 2201 is used to change the shape
To form a heating element 101. In the state of FIG.
The normal heating is performed and the temperature rises, but the predetermined value (here
Then, when the temperature exceeds 95 [° C]), the state becomes as shown in FIG.
Become. At this time, the shape memory alloy plate constituting the heating element 101
2201 indicates that the physical distance from the induction heating coil 102 is
As the distance increases, magnetic coupling deteriorates and eddy currents do not flow.
Heating stops. After a while, the temperature exceeds the specified value
When the shape memory alloy plate 2201 is lowered, the shape memory alloy plate 2201 is returned to the state shown in FIG.
Return to the state and heating is started, so the temperature is automatically adjusted
It can be performed. In addition, calcium carbonate contained in tap water and the like
Has a property that solubility decreases as the temperature increases,
This calcium carbonate precipitates and adheres to the metal plate of the heat exchanger.
You. The attached calcium carbonate is generally used for scaling.
Heat exchange to cover the metal surface of the heat exchanger.
Inhibit. However, when the heating element of this embodiment is used,
For example, at the time of heating, the shape memory alloy plate 2201 is as shown in FIG.
To repeat the state of FIG.
Calcium carbonate deposited and adhered by mechanical force due to change
Can be peeled off. By the operation described above, the heating element
Restore the shape memorized by temperature as the conductor used
By using conductors, the temperature is automatically adjusted and
Automatically removes water stains on the conductor surface
A heating device can be provided. (Reference example 4) Less than,Reference example 4Will be described with reference to the accompanying drawings. What
Note that, except for the parts that are daringly described, the same functions as in the first embodiment are performed.
Add Therefore, the overall configuration is the same as in the first embodiment.
Description is omitted. In FIG. 24, 2401 is shape memory
Alloy plate 2402 has flexible connection structure 2403
It is a spring. When heat exchange by induction heating is performed,
At the time of heating, it takes the shape of FIG.
Shape memory is stored so that it is not added. Heating element 10
When the temperature of 1 becomes higher than a predetermined value (for example, 95 [° C])
When the shape memory alloy plate 2401 extends the entire length of the spiral structure
The shape is memorized as shown in FIG.
Stable at the balance point with spring constant of 2403, shape memory
Part of the alloy plate 2401 sticks out of the induction heating coil 102
Soup Induction heating is connected to the magnetic flux generated by the induction heating coil.
Heating is performed by the eddy current generated by the
If it protrudes from the coil from part of the heating element, it protrudes
Since the electromotive force is no longer generated in the
The flowing current decreases, and the entire heating element 101 becomes an induction heating coil.
Heating value of the heating element is smaller than when it is in
Become. When the calorific value decreases and the temperature decreases, FIG.
And the calorific value returns to the original state. By repeating this
Temperature adjustment at a predetermined value becomes possible. (Examples)13) Examples below13Will be described with reference to the accompanying drawings. Figure
25 is an embodiment13It is a figure which shows the heating device of FIG. here
2501a to 2501c are induction heating coils. In addition, dare
Except for the parts described, they perform the same functions as in the first embodiment. Yo
Since the overall configuration is the same as that of the first embodiment, the description is omitted.
You. As the heating and heating coil 102, a cylindrical finite length
When using a solenoid, the magnetic flux density in the axial direction is
It becomes coarse near the opening of the gate and dense near the center. Only
While the figure25Induction of 2501a and 2501c shown in
The number of turns of the heating coil is 2501b.
By taking more, the magnetic flux density distribution is made uniform in the axial direction.
Can be made. By the operation described above, the finite-length source
Even with a solenoid, the winding of the induction heating coil should be
Number of turns per unit length must be greater than the number of turns in the center
Heating equipment that uniforms the magnetic flux density and performs uniform heating in the axial direction.
Can be realized. (Examples)14) Examples below14Will be described with reference to the accompanying drawings. Figure
26 is an embodiment14It is a figure which shows the heating device of FIG. here
2601a to 2601c are induction heating coils. In addition, dare
Except for the parts described, they perform the same functions as in the first embodiment. Yo
Since the overall configuration is the same as that of the first embodiment, the description is omitted.
You. Water scale such as calcium carbonate has a high temperature.
The higher the temperature, the lower the solubility
Scales are more likely to occur. In addition, the temperature of the fluid at which heat is exchanged
The greater the difference between the temperature and the heating element temperature, the greater the difference in solubility.
Therefore, many scales are generated on the heating element surface. When the fluid exchanges heat with the heating element,
If the heat exchange area and fluid volume are the same, the power of the heat exchange surface
The lower the density, the higher the temperature between the heating element and the fluid on the heat exchange surface.
The difference becomes smaller. Therefore, the heating element in the place where the fluid temperature is high
By reducing the power density of
it can. Here, the induction heating coil 102 is shown in FIG.
As shown, the induction heating coils 2501a to 2501b
And the number of turns of 2501c is larger than that of 2501b.
The strength of the magnetic field depends on the number of turns of the induction heating coil and the current
Magnetic flux density distribution is proportional to the number of coil turns.
For example, the heating value of the heating element near 2501a is reduced. The induction heating coil is configured as described above.
In the vicinity of 2601a where the fluid temperature is low and scale is hardly generated
Now, increase the temperature by increasing the temperature difference between the heating element and the fluid,
Lower the power density of the heating element as the body temperature rises
The temperature difference between the heating element and the fluid can be reduced. this
In order to obtain hot water of the same temperature,
Can reduce the occurrence of scale, compared to winding
You. By the operation as described above, induction heating is performed.
The number of turns per unit length is from one end to the other
The heating element
Lowers the power density on the surface that comes in contact with the hot water to prevent scale deposition
Heating device can be realized. [0101] As described above, the claims1According to the described invention
High-frequency power from the high-frequency power supply means
The heating element itself by the principle of induction heating.
You. The heating element at this time should be in a spiral shape that is electrically connected.
Or a helical shape, which can be used for heat exchange.
To increase the heat exchange area of the
When heating a liquid, a small volume heating element
The temperature can be raised to a temperature close to the point, and the heat exchange efficiency is high.
Can be done. Claims2Is easy to mass-produce
By stacking short heating elements in the axial direction, the length of the heating elements can be reduced.
Inexpensive variable and input power and power density can be set freely
Heating device. Claims3In the invention described in (1), the heating element is
By using conductors such as metal processed into a shape,
Increased contact area with body, especially improved heat exchange efficiency
A heating device is realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a heating device according to a first embodiment of the present invention. FIG. 2 is a configuration diagram of a spiral heating element of the heating device. FIG. 3 is a spiral heating element of the heating device. FIG. 4 is a diagram showing an example of a heating element of the heating device. FIG. 5 is a diagram showing a configuration example of the heating device. FIG. 6 is a configuration diagram of a heating device of a heating device according to a first embodiment of the present invention. [7] of the heating element of the heating device of the second embodiment of the present illustration of the magnetic flux density distribution in the block diagram of the heating element 8 the heating device of the heating device of the reference example 2 of the invention [9] the present invention FIG. 10 is a configuration diagram of a heating element of a heating device according to a third embodiment of the present invention. FIG. 11 is a configuration diagram of a heating element of a heating device according to a fourth embodiment of the present invention. FIG. 13 is a diagram illustrating a problem. FIG. 13 is a configuration diagram of a heating element of a heating device according to a fifth embodiment of the present invention. FIG. 14 is a configuration diagram of a heating element of a heating device according to a sixth embodiment of the present invention. 5] heating device of Reference Example 3 of the present illustration of the configuration and operation of the heating apparatus of the eighth embodiment of the block diagram Figure 16] The present invention of a heating element of the heating device of the seventh embodiment of the invention Figure 17 the invention FIG. 18 is a configuration diagram of a heating device according to a ninth embodiment of the present invention. FIG. 19 is a configuration diagram of a heating device of a heating device according to a tenth embodiment of the present invention. FIG. 20 is an embodiment of the present invention. configuration diagram of a heating element of the heating device 11 [Figure 21 is a configuration diagram of a heating element of the heating device of example 12 of the illustration of the characteristics of the metal plate constituting the heating element of the heating device [22] the present invention Figure 23] of the heating device of example 13 of the heating element structure and illustrates operation [Figure 25] the present invention of a heating device of reference example 4 of the heating element Figure [24] showing the operation of the present invention of the heating device diagram Figure 26 is a configuration diagram [Reference numerals] 101 heating elements 102 induction heating U-heating device of example 14 of the present invention 103 High frequency power supply means 104 Fluid transfer means 105 Container 201 Spiral structure 202 made of stainless steel plate Connection structure 301 Spiral structure 302 made of stainless steel plate Connection structure 601 Annular structure 701 made of stainless steel plate Heating element 701a Magnetic metal ring 701b Nonmagnetic metal ring 701c Non-magnetic metal ring 701d Non-magnetic metal ring 901a Heating element 901b Heating element 901c Heating element 901d Heating element 901e Heating element 1001 Heating element 1002 Connection structure 1003 Insulating sheet 1101 Activated carbon 1201 Heater 1202 Activated carbon 1301 Zeolite 1401 Sponge 1501 Catalyst carrying stainless steel plate 1701 Foaming Metal 1805 Vessel 1806 Water purifier 1807 Ferromagnetic material 1901 Temperature fuse connection structure 2001 Temperature positive characteristic resistance change metal plate 2201 Shape memory alloy 2202 Flexible connection structure 2401 Shape memory alloy 2402 Flexible connection structure 2403 Spring 2501a Induction heating coil 2501b Induction heating coil 2501c Induction heating coil 2601a Induction heating coil 2601b Induction heating coil 2601c Induction heating coil

──────────────────────────────────────────────────の Continuing on the front page (72) Hidekazu Yamashita 1006 Kadoma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. (72) Hideki Omori 1006 Kadoma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Tetsuo Obata 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Takayuki Urata 1006 Odaka Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) JP-A-62-240038 (JP, A) JP-A-61-101229 (JP, A) JP-A-59-63686 (JP, A) JP-A-9-308985 (JP, A) JP-A-9-269101 (JP, A) JP-A-9-201281 (JP, A) JP-A-9-92448 (JP, A) JP-A-8-171982 (JP, A) JP-A-7-65938 (JP, A) Kaihei 6-154623 (JP, A) JP-A-3-98286 (JP, A) JP-A-2-90796 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05B 6/10 F24H 1/10 F24H 1 / 18 A47J 27/00

Claims (1)

(57) [Claim 1] A heating element in which a plate-like conductor is formed in a spiral structure, and a winding of the spiral-shaped conductor so that the heating element is electrically closed. Only the beginning and the end of the winding are electrically connected and the circumferential direction of the heating element along the closed circuit
A connection structure for allowing a uniform eddy current to flow, a container for accommodating the heating element, an induction heating coil for induction heating the heating element, and a high-frequency power supply for supplying high-frequency power to the induction heating coil Means, the heating element is configured such that the total thickness in the radial direction with respect to the spiral structure of the conductor part forming the closed circuit is smaller than the skin thickness of the magnetic flux generated when performing induction heating, A heating device for inductively heating a heating element with an AC magnetic field generated by the induction heating coil.