JP2953964B2 - Liquid heating device using electromagnetic induction heating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid heating apparatus utilizing electromagnetic induction heating.

[0002]

2. Description of the Related Art As an instantaneous water heater, a gas instantaneous water heater is generally widely used. Because of the necessity, a water heater using electromagnetic induction heating that does not have such a concern has attracted attention.

[0003] The principle of the electromagnetic induction heating will be described. For example, when induction hardening is performed on the surface of a pipe b as shown in FIG.
This pipe b is placed at the center (inside A) of
And a high-frequency oscillator (not shown) are short-circuited to generate a magnetic flux Φ from the coil a to generate a heating current in the pipe b itself, thereby heating the pipe b.

Therefore, when the principle of such electromagnetic induction heating is used for an instantaneous water heater, similarly to the induction hardening of the pipe b, a water guide pipe c is arranged inside the coil a, The water d is passed through the water pipe c and induction heating is performed on the water pipe c to indirectly heat the water d (FIG. 13).

However, the water heater of such a principle has a very poor conversion efficiency of electric energy to heat energy (hereinafter referred to as heat conversion efficiency) of about 40%. This is mainly due to the generation of a magnetic flux φ (swelling in the air outside the coil due to mutual repulsion) as shown in FIG. 14, such magnetic loss, transmission line loss, The electric loss and the coil loss caused the above-described decrease in the heat conversion efficiency (in FIG. 14, the water conduit c is omitted to avoid complication of the drawing).

For this reason, not only in the water heater but also in an apparatus utilizing the technique of induction heating, the leakage magnetic flux (ineffective magnetic flux, air attenuation) is reduced as much as possible, and the coil efficiency is increased. is there. As shown in FIG.
A magnetic path is formed by disposing an iron core e made of a silicon steel plate at an appropriate position on the outer side B of the coil a, that is, a magnetic flux is passed through the iron core e, and a decrease in magnetic force is eliminated. It is general to improve the heat conversion efficiency.

However, even when the iron core e of an expensive silicon steel sheet is provided, the heat conversion efficiency of the water heater should be 50 to 60% (conditionally). Some are easy to achieve, but this is generally the case.) This is because a loss such as heat generation occurs in the iron core e. Nevertheless, at present, such instantaneous water heaters utilizing induction heating have substantially the best performance.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid heating apparatus such as a water heater that utilizes safe and clean electromagnetic induction heating, by remarkably increasing the heat conversion efficiency and improving its practicality. It is the purpose.

[0009]

According to a first aspect of the present invention, there is provided a coil (1) for generating at least one magnetic flux, a high-frequency oscillator (2) for supplying a high-frequency current to the coil (1),
A main heat exchange section (3) including a main heat exchange section (3) formed of a material that generates heat by receiving a magnetic flux; and a sub heat exchange section (4) formed of a material that also generates heat by receiving a magnetic flux. Is provided with a passage (30) through which the liquid to be heated passes, and is disposed inside (A) of the coil (1). The sub heat exchange section (4) passes through the liquid to be heated. The main heat exchange section (3) includes a passage (40) and is disposed outside (B) of the coil (1).
And heats the liquid passing through the passageway (30), and the sub heat exchange section (4) also generates heat by electromagnetic induction of the coil (1), thereby generating heat through the passageway (40).
Is intended to heat the liquid through the further the main heat exchanger
The replacement part (3) is formed as a substantially columnar body,
It is located inside (1), near both ends.
Is provided with a flange portion (6), (6), and the flange portion (6)
(6) The main heat exchange section from near both ends of the coil (1)
(3) characterized in that it protrudes outward in the radial direction.
The above-mentioned problem is solved by providing a liquid heating device using electromagnetic induction heating.

[0010] The second invention of the present application provides at least one magnetic field.
A coil (1) for generating a bundle and a high frequency wave applied to the coil (1)
High frequency oscillator (2) for supplying current
The main heat exchange part (3) formed by the material to be heated
Secondary heat generated by materials that generate heat by receiving magnetic flux
And a main heat exchange section (3).
A coil for providing a passage for liquid to be heated
It is disposed inside (A) of (1), and has sub heat exchange
The part (4) has a passage (40) through which the liquid to be heated is passed.
Provided on the outside (B) of the coil (1).
The main heat exchange section (3) is used for electromagnetic induction of the coil (1).
It generates more heat and heats the liquid passing through the passage (30).
And the auxiliary heat exchange section (4) is also a coil
The liquid that generates heat by the electromagnetic induction of (1) and passes through the passage (40)
It heats the body, and includes the above high-frequency oscillator (2)
A heat exchange part (2a) is also formed in the part, and this heat exchange part
In (2a), an appropriate passage through which the liquid to be heated is passed
(20) is provided.
To provide a liquid heating device using electromagnetic induction heating
Thus, the above problem is solved.

[0011] The third invention of the present application provides at least one magnetic device.
A coil (1) for generating a bundle and a high frequency wave applied to the coil (1)
High frequency oscillator (2) for supplying current
The main heat exchange part (3) formed by the material to be heated
Secondary heat generated by materials that generate heat by receiving magnetic flux
The main heat exchange section (3) is provided with an exchange section (4).
A passage (30) for passing the liquid to be fixed,
The auxiliary heat exchange section (4) which is disposed inside (A)
Has a passage (40) through which the liquid to be heated is passed,
And disposed outside (B) of the file (1).
Main heat exchange part (3) generates heat due to electromagnetic induction of coil (1)
And heats the liquid passing through the passage (30).
In addition, the auxiliary heat exchange section (4) is also electromagnetically operated by the coil (1).
Heat is generated by induction and heats the liquid passing through the passage (40).
And the main heat exchange section (3) is substantially columnar.
Formed as a body and disposed inside the coil (1).
In the vicinity of both ends, flange-shaped portions (6) (6)
Are provided, and the flanges (6) and (6) are provided with a coil (1).
Protrudes radially outward of the main heat exchange part (3) from near both ends
And heat exchange inside the high-frequency oscillator (2).
Exchange part (2a) is formed, and in this heat exchange part (2a),
Also, an appropriate passage (20) for passing the liquid to be heated is provided.
Electromagnetic induction heating, characterized in that
By providing a liquid heating device that utilizes
Solve the problem.

[0012] The fourth invention of the present application is directed to the first to third aspects.
In the invention of the first aspect, the coil (1) is a long conductor (11).
Is formed by spirally disposing
Further, the conductor (11) is provided with a passage through which liquid passes.
A tubular body forming (13), and the conductor (1
The liquid passing through the passage (13) is heated by the heat generated in 1).
4. The method according to claim 1 or 2, wherein
Provides a liquid heating device using electromagnetic induction heating
is there.

[0013]

In the liquid heating apparatus utilizing electromagnetic induction heating according to the first invention of the present application, a large heat loss is conventionally caused by arranging the sub heat exchange section 4 on the outer side B of the magnetic flux generating coil 1. Heat exchange was also enabled for the magnetic flux generated outside the coil 1 that had been used. As a result, the heat exchange rate was significantly improved to 90% or more as compared with the conventional case. Moreover, the coil 1
Between the main heat exchange part 3 of the inside A and the sub heat exchange part 4 of the outside B
Iron flanges 6 and 6 should be placed where magnetic flux
Forming a magnetic path in the flanges 6, 6 by
And eliminates significant magnetic attenuation that occurs in the air
Was. That is, a magnetic path is formed in the iron flanges 6 and 6.
Therefore, due to the spontaneous magnetism of iron,
It does not cause significant damping of qi. Flange 6,
6, a magnetic path is formed from the sub heat exchange unit 4 to the main heat exchange unit 3.
Is performed, and magnetic loss can be prevented. to this
In addition, to prioritize heating of liquids such as water,
Do not allow unnecessary parts to be heated.

Utilizing electromagnetic induction heating according to the second invention of the present application
The liquid heating device is located on the outside B of the coil 1 for generating magnetic flux.
By installing the auxiliary heat exchange section 4,
Magnets generated outside the coil 1 that had lost energy
Heat exchange was also possible for the bundle. This results in a heat exchange rate
Of 90% or more, which is remarkably improved as compared with the prior art. And high
Due to the electric loss due to electric resistance inside the frequency oscillator 2
Heat can be converted into heat.
In addition, the heat conversion efficiency can be improved.

Utilizing electromagnetic induction heating according to the third invention of the present application
The liquid heating device according to the first and second aspects of the present invention.
The function of the device is achieved.

The electromagnetic induction heating according to the fourth invention of the present application is used.
The liquid heating device has the function of the device according to each of the above inventions.
And at the same time, pass the heat exchange liquid through the coil 1 itself.
Therefore, the heat generated by the coil 1 itself during energization is
It can be exposed to heat, further increasing the heat conversion efficiency
Was.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below.

This device comprises at least one coil 1 for generating magnetic flux, a high-frequency oscillator 2 for supplying a high-frequency current to the coil 1, a main heat exchange section 3 formed of a material which receives and heats the magnetic flux, It also has a sub heat exchange section 4 formed of a material that receives a magnetic flux and heats it. 1, 2, 3, and 7, first, an example of the configuration of the periphery of the heat exchange unit will be described (the high-frequency oscillator 2 is omitted in these drawings).

The coil 1 is connected to a high frequency oscillator 2,
An alternating current is received from the high-frequency oscillator 2 to generate a magnetic flux. The coil 1 may be simply formed as a conducting wire, but a hollow tubular body (copper tube) made of a conductor such as copper or a copper alloy in order to provide heat generation in the coil itself to heat the liquid. It is effective to adopt a helical shape of) and allow a liquid such as water to be heated to pass therethrough. In this case, the heating of the coil 1 itself can be suppressed. When the coil 1 is formed as a copper tube as described above, it is appropriate to use a coil which is insulated and coated with a material such as Nomex paper. Of course, other materials can be used in place of Nomex paper as long as insulation and thermal conductivity can be obtained. In this embodiment, the coil 1 has an outer diameter of about 10 mm and a thickness of about 1 mm, but the present invention is not limited to such numerical values and can be changed as appropriate. In the embodiment shown in FIG. 7, the copper tube forming the coil 1 is shown as being double, but the coil 1 can be implemented even if it is triple or more. Instead of a plurality of overlapping ones, only one may be used. The coil 1 may be a copper tube, but if it is formed using stainless steel, it is more effective in terms of thermal conductivity.

The main heat exchange section 3 is disposed inside the coil 1 and generates heat by receiving a magnetic flux from the coil 1 to generate a heating current. The sub heat exchange unit 4 is disposed outside the coil 1 and receives a magnetic flux generated outside the coil 1 to generate a heating current and generate heat. Both heat exchange sections 3, 4
As a material capable of performing the electromagnetic induction heating to form the above, a metal material is suitable regardless of iron or non-ferrous, but in practical use, particularly, aluminum, aluminum alloy, SUS material and other metals such as iron are suitable. I have. However, besides this,
If there is a material that can be subjected to electromagnetic induction heating within a practical range, such a material can be used instead of the above material. Hereinafter, the main heat exchange unit 3 and the sub heat exchange unit 4 will be described in detail in order.

The main heat exchange section 3 has a passage 30 through which a liquid to be heated is passed. In this example,
The main heat exchange section 3 is formed as a column that can be accommodated in the inside A of the coil 1, and the passage 30 is formed inside the column 31. However, the present invention is not limited to such an embodiment.
The present invention is also applicable to a configuration in which a tubular body 30a having a zero inside is formed in a spiral shape or the like (FIG. 4). Also, when formed as a cylindrical body as described above,
Although it is suitable to form by casting or the like, it is also possible to adopt a form other than a spiral so that casting can be performed easily. For example, the present invention can be practiced even if it is arranged in a ninety-nine fold (sludge) shape like a tubular body 30a in FIG. Furthermore, the present invention can be implemented even if another arrangement of the passage 30 is adopted. The arrangement other than the spiral shape, including the embodiment shown in FIG. 5, can be applied not only to the tubular body 30a but also to the one in which the passage 30 is formed inside the heat exchange section formed as a columnar body. (In this case, the embodiment of FIG. 5 is as shown in FIG. 6). In particular, in the case of molding by casting, the arrangement of the passage 30 shown in FIG. 5 is advantageous in terms of ease of molding.

In the embodiment shown in FIG. 7, a main pipe 31 is passed through the center of the main heat exchange section 3 formed as a columnar body, and a passage 30 is formed spirally outside the main pipe 31. I have. The main pipe 31 also allows the liquid to be heated to pass therethrough together with the passage 30 or as a part of the passage 30, and receives the heat generated by the main heat exchange unit 3 to heat the liquid. The main pipe 31 is suitably made of a SUS pipe, but may be formed of another material. In this embodiment, the main pipe 31 has a larger inner diameter than the passage 30.
It has an inner diameter of about mm. However, it is not limited to such numerical values, and can be changed as appropriate. When the outer diameter of the main heat exchange section 3 is large, the main pipe 31
This is particularly effective in such a case, since the diameter of the spiral to be formed becomes large and heat exchange at the center of the main heat exchange section 3 becomes difficult.

In this embodiment, the main heat exchange section 3 is made of aluminum which is easy to mold,
Is fitted. Main heat exchange part 3 made of aluminum
Both the main body and the external iron tube 32 receive magnetic flux and generate heat. The iron tube 32 is provided for the purpose of forming a better magnetic path inside the coil 1. If not necessary, the iron tube 32 may not be provided and only the aluminum portion 33 may be used.
May be formed, but it is necessary to impart corrosion resistance in order to come into contact with the liquid, and the weight increases, so that it is not practical for ordinary use). The iron tube 32 is formed of SS material in this embodiment, and has an outer diameter of about 40 mm and about 3.
It has a thickness of 5 mm. However, these values can be appropriately changed according to a change in the size of the main heat exchange section 3.

It is appropriate that the outside of the iron tube 32 is appropriately covered with a heat insulating material 34 such as paper. If unnecessary, the heat insulating material 34 may be used without providing the heat insulating material 34.

Further, at both ends of the main heat exchanging portion 3, iron flange portions 6, 6 are provided. In the embodiment shown in FIG. 7 including the iron tube 32, the flanges 6, 6 are formed integrally with the iron tube 32. However, unlike the above, iron pipe 3
2 and the flange portions 6 and 6 may be formed separately. For example, the flanges 6, 6 may be formed as separate disks and provided at both ends of the main heat exchange unit 3. In this case, it is appropriate that the main heat exchange unit 3 is fitted into the main heat exchange unit 3 as an annular body (a disk provided with a hole in the center) as a separate body. In consideration of the convenience when mounting the coil 1, only one flange-shaped portion 6 is formed integrally with the iron tube 32,
The other flange 6 may be formed separately from the iron tube 32 so as to be detachable. The outer diameter of the flanges 6, 6 has substantially the same size as the inner diameter of the sub heat exchange unit 4. Such iron-made flanges 6 and 6 form a magnetic path inside themselves, and spontaneous magnetism is generated due to the characteristics of iron, which is a magnetic material, and significant attenuation such as magnetic flux in the air occurs. Does not occur. Further, for example, when such flange-shaped portions 6 and 6 are formed of copper or aluminum, a large magnetic attenuation occurs, though not so much in the air. Therefore, by being formed of the above-mentioned material, particularly iron, the attenuation of magnetism due to spontaneous magnetism (spontaneous magnetization) can be suppressed. In addition, by disposing the flanges 6 and 6 to form a magnetic path, the iron pipe 32 and the flanges 6 are formed.
6 and the sub heat exchange section 4 form a closed magnetic path, and the magnetic flux outside the coil naturally passes through the magnetic field selectively (as a result, it is forced). ). In this way, the magnetic force is confined (closed magnetic path) between the peripheral edges of the flange portions 6 and 6, and as a result, the auxiliary heat exchange portion 4
Is securely contained in the location where the is arranged. In the embodiment shown in FIG. 7, an iron pipe 32 covering the outer periphery of the main heat exchange unit 3 is provided.
The space surrounded by the flange portions 6 and 6 on both sides thereof and the inner peripheral surface of the sub heat exchange portion 4 accommodates the coil 1 as the coil chamber 10 (see FIGS. 2 and 3). As shown in FIGS. 1, 2 and 3, the lids 5 and 5 can be fitted to both ends of the sub heat exchange section 4. In this case, the lids 5 and 5 can be used.
The flanges 6, 6 are located along the surfaces 5a, 5a. The lids 5, 5 are formed of the same material as the main heat exchange section 3, that is, a material such as aluminum.
As shown in FIG. 2, the end portion 3 of the main heat exchange portion 3
5 is formed so as to protrude (when the flange 6 is formed separately from the iron pipe 32, the end 3 is formed at the center of the flange 6).
It is appropriate to provide a through-hole for passing 5. On the other hand, a concave portion 50 is provided at the center of the surface 5a of the lid 5 facing the flange portion 6 side, and the concave portion 50 is provided with an end portion 35 of the main heat exchange portion 3.
It is also effective to be able to fit. Reference numeral 51 denotes a groove for fitting an end of the sub heat exchange unit 4. A fastener that penetrates the center of the lid 5 from the outer surface of the lids 5 in a state where the lids 5 and 5 are fitted and the recess 50 and the end 35 of the main heat exchange unit 3 are fitted. 52 is screwed with a screwing portion 36 provided at the center of the end portion 35 of the main heat exchange portion 3. The screw portion 36 is a hole formed with a female screw on the inner peripheral surface, and is screwed with a male screw provided near the distal end of the fastener 52. Main pipe 3 shown in FIG.
In the case where 1 is provided, a passage for passing the liquid connected to the main pipe 31 may be formed at the center of the fastener 52 (not shown).
In this case, as shown in FIG. 1, a connecting portion 52a that connects to another and forms a liquid passage is provided in the fitting 52. or,
In order to securely fix the lids 5, 5, as shown in FIG. 1, an appropriate number of interposed rods 53 are passed between the lids 5, 5, and screws 54 are screwed into the lids 5, 5. It is also effective to make the interposition rods 53 and the same body.

The sub heat exchange section 4 is a cylindrical body having a sufficient inside diameter to accommodate the coil 1 therein. That is, as shown in FIG. 2 and FIG.
Is disposed on the outer side B. The passage 40 through which the liquid passes is formed in the thick inner portion 41 of the sub heat exchange section 4 as in the main heat exchange section 3. When the passage is formed by a pipe, if an SUS pipe is used, the outer diameter is about 10 mm and about 0.2 mm.
Those having a thickness of the order are suitable. However, the material is not limited to such a material, and the dimensional value can be appropriately changed. In this embodiment, the auxiliary heat exchange part 4 is formed as a cylindrical body capable of housing the coil 1 therein, and the passage 40 is formed in the thick inner part 41 as described above. Although the embodiment has been described, the present invention is not limited to such an embodiment, and the embodiment may be implemented by forming the tubular body into a spiral shape or the like as in the above-described main heat exchange unit 3. This is similar to the embodiment of the main heat exchange section 3 shown in FIG. 4 (not shown). When it is formed as a cylindrical body as described above, it is appropriate to form it by casting or the like, as in the case of the main heat exchange section 3. However, also in this case, a form other than a spiral is used so that casting can be easily performed. However, the present invention can be implemented. For example, as in the embodiment of the main heat exchanging unit 3 shown in FIG. Further, the present invention can be implemented even if another arrangement of the passage 40 is adopted. Regarding mass production, not only the above casting,
Any means such as machining, can making or press molding, and molding by a bender or the like can be adopted. A production method that is advantageous from the viewpoint of cost and the like may be appropriately selected and implemented.

In this embodiment, the main body (thick portion) of the sub heat exchange section 4 is made of aluminum and has an outer diameter of about 13 mm.
The inner diameter is 2 mm, the inner diameter is about 90 mm, and the width in the longitudinal direction (the configuration of the main heat exchange section 3 also takes substantially the same value) is about 250 m.
m. A large pipe 42 made of a SUS material and having a thickness of about 2.1 mm is provided on the inner peripheral surface of the sub heat exchange unit 4. That is, the inner peripheral surface of the sub heat exchange section 4 has a thickness of about 2.
It is covered with 1 mm SUS material. Such numerical values can be appropriately changed, and the large tube 42 can be implemented without being provided if unnecessary.

Since the high-frequency oscillator 2 generates a large amount of heat from the transistors, transformers, capacitors, and the like provided therein, the heat radiated from the device d is converted into liquid heating, thereby further increasing the thermal efficiency. It is possible to get. Therefore, it is also effective to form the liquid passage 20 and the heat exchange portions 2a... Appropriately around these devices inside the high-frequency oscillator 2 as required, and to implement the arrangement (FIG. 8).

Next, a brief description will be given of a system for feeding a liquid to be heated, that is, a liquid used for heat exchange. Main heat exchange section 3
(If there is a main pipe 31, this is included.)
The passages 40 of the sub heat exchange section 4 may each be a passage through which the liquid is separately passed, or may be a passage through which the liquid is circulated. As described above, when heat is exchanged also in the coil 1 or the high-frequency oscillator 2, the liquid passing therethrough may or may not be in communication. It may be selected as needed.

For example, in the embodiment shown in FIG. 7, the main heat exchange section 3 (passage 30), the coil 1 and the sub heat exchange section 4 (passage 40) are introduced from the introduction ends P1, P2 and P3, respectively. The liquid L for heating is separately sent from the outside. And
The liquid after the heating is finally all led to the main pipe 31 and sent to the outside collectively. In this embodiment, the connecting pipe P2 sends the liquid heated by the high-frequency oscillator 2 further into the coil 1. As described above, when all the paths are in communication with each other, regarding the liquid circulation path, the liquid first passes through the outside of the apparatus (the passage 40 of the sub heat exchange unit 4), and the liquid passes through the inside (the main heat exchange unit 3). Suitably, the passage 30) is later heated by the liquid and finally heated. However, it is appropriate that the temperature of the liquid passing through the outside of the apparatus (the passage 40 of the sub heat exchange section 4) is lower than the temperature of the liquid passing through the inside (including the coil 1). is there. This is because, when a high-temperature liquid first passes to the outside, heat loss occurs due to heat radiation in a radially outward direction of the sub heat exchange unit 4.

Further, the main pipe 3 serving as such a manifold is provided.
An example of a system for transferring each liquid in the case where No. 1 is not used will be briefly described with reference to FIGS. 8, 9, 10, and 11. FIG.

In FIG. 8, each passage for passing the liquid is completely independent and does not go around. That is, the liquid such as water that has entered the passage 40 from the end P11 of the passage 40 becomes hot water and is guided to the outside from the end P16. Similarly, a liquid such as water entering the coil 1 from the end P12 becomes hot water and is guided to the outside from the end P14. Also, end P
The liquid such as water that has entered the passage 30 from the path 13 becomes warm water and is guided to the outside from the end P15. On the other hand, the passage 20 provided inside the high-frequency oscillator 2 also receives heat from a device that generates a large amount of heat and performs heat exchange. That is, the liquid such as water entered from the end P10 receives the heat generated in the device from the heat exchanging sections 2a, becomes hot water, and is guided to the outside from the end P17.

The one shown in FIG. 9 circulates the liquid in one system. That is, all the paths communicate. First, from the end P100 of the passage 20, the high-frequency oscillator 2
The liquid that has entered inside is the end P170 and the end P of the coil 1.
It is led into the coil 1 through the connecting pipe T1 interposed between the coil 120 and the coil 120. The liquid discharged from the end P140 of the coil 1 is
The fuel enters the passage 40 of the sub heat exchange unit 4 via the communication pipe T2 interposed between the end P140 and the end P110 of the passage 40. The liquid that has exited the passage 40 enters the passage 30 of the main heat exchange unit 3 from the end P130 via the communication pipe T3 interposed between the end P160 of the passage 40 and the end P130 of the passage 30. After passing through the passage 30, the liquid is guided to the outside from the end P150.

FIG. 10 shows an example in which the liquid has two paths. That is, in one system, the liquid enters the passage 20 from the end P101, passes through the communication pipe T10 interposed between the end P171 and the end P121 of the coil 1, passes through the inside of the coil 1, and ends at the end of the coil 1. It goes out of the section P141. Then, in the other system, the liquid enters the passage 30 from the end P131 of the passage 30, and the end P151 of the passage 30 and the end P111 of the passage 40 of the sub heat exchange unit 4 from the end P151 of the passage 30. Through the connecting pipe T30 interposed therebetween, it is guided into the passage 40 and exits from the end P161 to the outside.

The one shown in FIG. 11 also has two liquid paths. In one system, the liquid enters the passage 20 from the end P102 and the other end P172 of the passage 20
From the end P172 and the end of the passage 40 of the sub-heat exchange section 4 through the connecting pipe T11, is led to the passage 40 and exits from the end P162 to the outside of the passage 40. is there. The other system is the end P12 of the coil 1.
2, the coil 1 enters the coil 1, and from the other end P142 of the coil 1 via the communication pipe T12 interposed between the end P142 and the end P132 of the passage 30 of the main heat exchange unit 3, It enters the passage 30 from the end P132, and the end P15
It goes outside from 2.

The present invention can be implemented even if the liquid circulates in a system and a route other than those described above, and is not limited to the above embodiment.

In each of the embodiments described above, the main heat exchange unit 3 is arranged at the center of the apparatus, one coil 1 is arranged outside the unit, and one sub heat exchange unit 4 is arranged outside the unit. The present invention can be implemented even with the following configuration (not shown). A plurality of (spiral) coils 1 of different diameters are arranged concentrically, a main heat exchange section 3 is arranged inside the coil 1 at the center, and a sub heat exchange is arranged outside the coil 1 at the outside. Not only is the portion 4 arranged, but also between the coils located between the centermost portion and the outermost coils 1 and 1,
Alternatively, a heat exchange unit may be separately provided between the coil located in the middle and the centermost and outermost coils 1 and 1. That is, a heat exchange portion is formed between all of the plurality of coils. For example, when there are two coils, the heat exchange part (main heat exchange part), the coil,
The heat exchange part, the coil, and the (sub) heat exchange part are arranged. Of course, if the number of coils is increased, the number of heat exchange units may be increased accordingly. When a plurality of coils are provided in this manner, regarding one coil, the heat exchange part located inside the coil is considered as a main heat exchange part, and the one located outside the coil is considered as a sub heat exchange part. Good (in this case, the outer heat exchange part is both the sub heat exchange part of this coil and the main heat exchange part of the outer coil).

The liquid heating apparatus according to the present invention uses a means of electromagnetic induction heating, which is clean and highly safe, to heat a water heater or other liquid. still,
Heating of water or other liquids may be the end purpose,
Further, such a liquid may be heated as a medium for supplying heat to another, and can be widely used regardless of the purpose of heating the liquid.

Further, the apparatus according to the present invention does not use gas, so that the apparatus according to the present invention can be used in hospitals, nursing homes, high-rise buildings, underground shopping centers, offices, etc. from the viewpoints of safety and cleanliness. Further, it is possible to heat a liquid such as a water heater, which is extremely suitable for such an environment, in an area where gas diffusion rate is low (including overseas). In particular, since the heat conversion efficiency is remarkably improved, the miniaturization is also remarkably improved.

[0040]

According to the present invention, the present invention can be suppressed.
Of the magnetic flux generated outside the magnetic flux generating coil
Heat exchange is also possible, that is,
For the magnetic flux outside the coil,
We will actively use this as a target for heat exchange.
Was. That is, one coil generates flux (magnetic force).
Line) to capture all its magnetic field without loss
The coil from outside to form a closed magnetic structure.
Water from the heated metal body
And take heat. As a result, the heat conversion efficiency
The improvement was remarkably improved. Also, the heating rate
Significant improvement could be achieved. Furthermore, to suppress the above magnetic flux,
Costs are eliminated because expensive silicon steel plates used are not used.
This is also advantageous.

In particular, the first invention of the present application is characterized in that the main heat exchange section
A magnetic path is formed in iron between both ends of the heat exchange section
As a result, magnetic attenuation can be suppressed, and energy loss
Liquid heating using electromagnetic induction heating that can reduce
A thermal device could be provided.

The second invention of the present application is a high-frequency oscillator 2
Also recovers the magnetic loss generated inside the
Heat conversion to a more complete state.
Utilizes electromagnetic induction heating that can improve exchange efficiency
Thus, a liquid heating device can be provided.

Further, the third invention of the present application is the first invention described above.
Use of the electromagnetic induction heating having both the effects of the invention and the second invention.
Liquid heating device using
You. Still further, the fourth invention of the present application is directed to the first to third inventions.
In addition to the light effect, the heat generated by the coil 1 itself
Can also perform heat exchange with the liquid,
Liquid using electromagnetic induction heating that can increase exchange efficiency
Thus, a body heating device can be provided. That is,
Water is usually used for coil cooling, but this water is discarded.
Had been. By implementing the fourth invention of this application,
It takes in water and uses it.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing an embodiment of the present invention.

FIG. 3 is an exploded perspective view of a main part showing an embodiment of the present invention.

FIG. 4 is a side view of a main part showing one embodiment of the present invention.

FIG. 5 is a perspective view of an essential part showing one embodiment of the present invention.

FIG. 6 is a partially cutaway perspective view showing an embodiment of the present invention.

FIG. 7 is a schematic vertical sectional view of a main part showing an embodiment of the present invention.

FIG. 8 is a schematic vertical sectional view of a main part showing an embodiment of the present invention.

FIG. 9 is a schematic vertical sectional view of a main part showing one embodiment of the present invention.

FIG. 10 is a schematic vertical sectional view of a main part showing an embodiment of the present invention.

FIG. 11 is a schematic vertical sectional view showing a main part of an embodiment of the present invention.

FIG. 12 is a diagram illustrating the principle of electromagnetic induction heating.

FIG. 13 is a diagram illustrating the principle of electromagnetic induction heating.

FIG. 14 is an explanatory diagram of a problem when using electromagnetic induction heating.

FIG. 15 is an explanatory diagram of a problem when using electromagnetic induction heating.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil 2 High frequency oscillator 3 Main heat exchange part 4 Sub heat exchange part 30 Passage 40 Passage

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-286654 (JP, A) JP-A-4-39637 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24H 1/10

Claims (4)

(57) [Claims] At least one magnetic flux generating coil (1), a high-frequency oscillator (2) for supplying a high-frequency current to the coil (1), and a main heat exchange formed of a material that receives a magnetic flux and generates heat. (3) and a sub heat exchange part (4) formed of a material that also receives magnetic flux and generates heat. The main heat exchange part (3) has a passage (30) through which a liquid to be heated passes. The auxiliary heat exchange section (4) is provided with a passage (40) through which a liquid to be heated is passed, and is provided outside the coil (1). B), wherein the main heat exchange section (3) generates heat by electromagnetic induction of the coil (1) and heats the liquid passing through the passage (30), and the auxiliary heat exchange section (3). The portion (4) also generates heat by electromagnetic induction of the coil (1) and passes through the passage (40). Is intended to heat the liquid, further, the main heat exchanger unit (3) is formed as a substantially columnar body
And disposed inside the coil (1).
And flanges (6) and (6) are provided near both ends.
The flanges (6) and (6) are located near both ends of the coil (1).
Projecting radially outward of the main heat exchange section (3).
A liquid heating device using electromagnetic induction heating , characterized in that: 2. A coil for generating at least one magnetic flux.
(1) and a high voltage for supplying a high-frequency current to the coil (1).
The frequency oscillator (2) and the material that receives magnetic flux and generates heat
The main heat exchange part (3) formed by
The auxiliary heat exchange part (4) formed by the material that generates heat
The main heat exchange section (3) is provided with a passage through which liquid to be heated is passed.
(30), which is disposed inside (A) of the coil (1).
The auxiliary heat exchange section (4) is a passage through which the liquid to be heated is passed.
(40), and disposed outside (B) of the coil (1).
It is as hereinbefore, the main heat exchange part (3) by electromagnetic induction of the coil (1)
It generates heat and heats the liquid passing through the passage (30).
At the same time, the auxiliary heat exchange section (4)
Heat is generated by electromagnetic induction and heats the liquid passing through the passage (40).
The heat exchange unit (2a) is also provided inside the high-frequency oscillator (2).
Is formed, and heating is also planned in the heat exchange section (2a).
Provided with an appropriate passage (20) for passing a liquid to be discharged
A liquid heating device using electromagnetic induction heating , characterized in that: 3. A coil for generating at least one magnetic flux.
(1) and a high voltage for supplying a high-frequency current to the coil (1).
The frequency oscillator (2) and the material that receives magnetic flux and generates heat
The main heat exchange part (3) formed by
The auxiliary heat exchange part (4) formed by the material that generates heat
The main heat exchange section (3) is provided with a passage through which liquid to be heated is passed.
(30), which is disposed inside (A) of the coil (1).
The auxiliary heat exchange section (4) is a passage through which the liquid to be heated is passed.
(40), and disposed outside (B) of the coil (1).
It is as hereinbefore, the main heat exchange part (3) by electromagnetic induction of the coil (1)
It generates heat and heats the liquid passing through the passage (30).
At the same time, the auxiliary heat exchange section (4)
Heat is generated by electromagnetic induction and heats the liquid passing through the passage (40).
Is intended to further the main heat exchanger unit (3) is formed as a substantially columnar body
And disposed inside the coil (1).
And flanges (6) and (6) are provided near both ends.
The flanges (6) and (6) are located near both ends of the coil (1).
Projecting radially outward of the main heat exchange section (3).
The heat exchange section (2a) is also provided inside the high-frequency oscillator (2).
Is formed, and heating is also planned in the heat exchange section (2a).
Provided with an appropriate passage (20) for passing a liquid to be discharged
A liquid heating device using electromagnetic induction heating , characterized in that: 4. The coil (1) comprises a long conductor (11).
Is formed by spirally disposing
Further, the conductor (11) is provided with a passage through which liquid passes.
(13) is a tubular body forming the at heat generation Energized conductors (11), through the passageway (13)
The liquid is heated, wherein the liquid is heated.
Is a liquid heating device using electromagnetic induction heating described in 2 or 3.
Place.