CN220457613U

CN220457613U - Electromagnetic heating device

Info

Publication number: CN220457613U
Application number: CN202123336764.2U
Authority: CN
Inventors: 暴辰生; 暴铱; 刘佩; 陈佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2024-02-06
Anticipated expiration: 2031-12-28

Abstract

The present utility model provides an electromagnetic heating device, comprising: and the shell is provided with a coil in a winding way on the outer wall of the shell. The shell is internally provided with a heating tube with hollow inside for generating heat by acting with the coil. The housing is provided with an inlet and an outlet for input and output of a medium, respectively. The shell and the coil are arranged in the shell and are used for protecting the shell and the coil and shielding electromagnetic radiation. In addition, ferromagnetic powder is mixed in the medium and used for generating heat by acting with the coil. The heating device is simple in structure, high in heating efficiency, capable of conducting heat fully, and safe and reliable in heating process, and invalid dissipation of heat is avoided.

Description

Electromagnetic heating device

Technical Field

The utility model relates to the technical field of electromagnetic heating, in particular to an electromagnetic heating device.

Background

Electromagnetic induction heating is an energy conversion method that converts electric energy into heat energy by using the principle of electromagnetic induction. When high-speed alternating current passes through the coil, the coil can generate high-speed alternating magnetic field, strong eddy current can be generated in the ferromagnetic conductor arranged in the magnetic field, the eddy current generates a large amount of heat, and the temperature of the ferromagnetic conductor is rapidly increased, so that the purpose of heating is achieved.

In the prior art, electromagnetic heating systems utilize this principle to make a container from ferromagnetic conductors. The container functions as a heating element, and contains a liquid heat-conducting medium (typically, water, a liquid such as heat-conducting oil, etc.). A coil is wound outside the container for a certain number of turns, and when the coil passes through (10-40 kHz) high-frequency current, strong eddy current is generated in the container as a ferromagnetic conductor heating element, and a large amount of heat is generated by the eddy current to rapidly heat the container. The heated heat is transferred from the container to the liquid heat conducting medium inwards, and the liquid heat conducting medium absorbs the heat of the container and flows to a place where the heat is needed through a pipeline. After releasing heat at the place where heat is needed, the heat flows back again, is heated again, and circulates reciprocally, so that the purpose of heat supply is achieved.

However, this conventional electromagnetic heating system has problems in application, which are mainly represented by the containers made of ferromagnetic conductors. After the container is heated, heat in the container is transferred to the periphery. Some of the heat is transferred to the heating medium to form effective heat transfer. And another part of heat is conducted outwards from the outer surface of the container, so that the phenomenon of ineffective outwards dissipation of the heat is caused, the heat loss is caused, and the electric-heat conversion efficiency of the whole electromagnetic heating system is reduced. Meanwhile, due to the skin effect, when the frequency of the alternating electromagnetic field is higher, the current density of the outer surface of the heating body is higher, and the temperature is higher; the smaller the inner surface current density of the heat generator, the lower the temperature. According to the heat conduction principle, the temperature difference is reduced when heat is transferred to the inside of the heating element due to the phenomenon of external heat and internal cooling, and the result is that the effective conduction heat is further reduced; the temperature difference increases when heat is transferred to the outside of the heating element, and as a result, ineffective heat transfer is further increased, and the electric-thermal conversion efficiency is lowered.

Therefore, a need exists for an electromagnetic heating device with high heat utilization and high electric-thermal conversion efficiency.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, namely the problems of ineffective heat dissipation and low electric heat conversion efficiency of an electromagnetic heating device in the prior art in the heating process, and provides the electromagnetic heating device.

The utility model provides an electromagnetic heating device, which is characterized in that the material of a container is changed from a ferromagnetic conductor material to a nonmetallic organic material, so that the container can not generate heat in an electromagnetic field. That is, the function of the container as a heating element is removed, and only the function of the container for accommodating the liquid heat-conducting medium is maintained. And secondly, arranging a heating element made of a ferromagnetic conductor in the container, and completely soaking the heating element in a liquid heat conducting medium, so that heat generated by the heating element can be completely transferred to the liquid heat conducting medium.

The heating device includes: a housing, the housing outer wall winding a coil; a heating tube with a hollow interior is arranged in the shell and used for generating heat by acting with the coil; the shell is provided with an inlet and an outlet which are respectively used for inputting and outputting media; the housing and the coil are both disposed within the housing for protecting the housing and the coil and shielding electromagnetic radiation.

Further, the shell is a nonmetallic tube with two open ends; the heating tube is a pure iron tube, and the inside of the heating tube is hollow for medium circulation; the back of the shell is provided with a notch, and the shell is grounded and used for shielding and guiding electromagnetic radiation energy generated by the coil.

Further, the medium is water or heat conducting oil, and ferromagnetic powder is mixed in the water or the heat conducting oil and is also used for generating heat by acting with the coil.

In one embodiment of the utility model, a first end cover is arranged at one end opening of the shell and is used for sealing the end opening of the shell and connecting an input pipe; the other end opening of the shell is provided with a second end cover which is used for sealing the end opening of the shell and connecting an output pipe.

Further, at least one supporting ring is fixedly arranged in the shell, a fixing hole is formed in the center of the supporting ring, and at least one heating tube is fixed in the fixing hole of the supporting ring; the support ring is also provided with a plurality of through holes for medium to circulate inside the shell.

In one embodiment of the utility model, a first end cover is arranged at one end opening of the shell and is used for sealing the end opening of the shell and connecting an input pipe; the other end opening of the shell is provided with a second end cover for sealing the end opening of the shell; and the side wall of the shell is provided with a hole which is connected with an output pipe for medium conveying.

Further, the first end cover is provided with a mounting hole for mounting a through joint, and the input pipe is fixed at one end of the through joint; one end of the heating tube is fixedly connected with the other end of the straight-through joint.

The utility model provides an electromagnetic heating device, which is characterized in that the heating device comprises: the shell is provided with a coil in a winding way on the outer wall of the shell; the shell is filled with a medium mixed with ferromagnetic powder, and the ferromagnetic powder is used for generating heat through the action of the ferromagnetic powder and the coil; the shell is provided with an inlet and an outlet which are respectively used for inputting and outputting media; the housing and the coil are both disposed within the housing for protecting the housing and the coil and shielding electromagnetic radiation.

Further, the shell is a nonmetallic tube with two open ends; the back of the shell is provided with a notch, and the shell is grounded and used for shielding and guiding electromagnetic radiation energy generated by the coil.

Further, a first end cover is arranged at the opening of one end of the shell and is used for sealing the opening of the end of the shell and connecting an input pipe; the other end opening of the shell is provided with a second end cover which is used for sealing the end opening of the shell and connecting an output pipe.

According to the above embodiments, the electromagnetic heating device provided by the utility model has the following advantages:

1. compared with the prior art, the whole pure iron steel pipe of the heating device is soaked in water or heat conducting oil or water or heat conducting oil added with ferromagnetic powder, and the heat in the steel pipe and the heat in the ferromagnetic powder can be completely transferred to heat carrier water or heat conducting oil or water or heat conducting oil added with ferromagnetic powder, so that the phenomenon of ineffective outward heat dissipation is greatly reduced, and the heat efficiency of electromagnetic heat supply is greatly improved.

2. As the phenomenon of invalid dissipation of heat outwards is prevented to a great extent, the temperature rise of the coil wire is avoided, the normal work of the coil wire is ensured, and the safety is improved.

3. Because a liquid medium (water or heat conducting oil or water or heat conducting oil added with ferromagnetic powder) for absorbing heat exists between the coil and the ferromagnetic conductor, a heat insulating material is not needed to isolate the ferromagnetic conductor from the coil, so that the acting distance between the coil and the ferromagnetic conductor is reduced, and the electric-thermal conversion efficiency of the whole electromagnetic heating system is greatly improved.

4. Under the action of high-frequency alternating-current magnetic field, not only the pure iron steel tube arranged in the center of the ferromagnetic conductor complex is heated, but also the ferromagnetic powder uniformly dispersed in the water or heat conducting oil added with the ferromagnetic powder is heated, so that the electric-thermal conversion efficiency of the whole electromagnetic heating system is greatly improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the utility model, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and, together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic structural diagram of an embodiment of an electromagnetic heating device according to the present utility model.

Fig. 2 is a cross-sectional view at A-A in fig. 1.

Fig. 3 is a schematic structural diagram of a second embodiment of an electromagnetic heating device according to the present utility model.

Fig. 4 is a schematic structural diagram of a third embodiment of an electromagnetic heating device provided by the utility model.

Fig. 5 is a block diagram of an application one of the first embodiment of the electromagnetic heating device provided by the utility model.

Fig. 6 is a block diagram of an application two of the first embodiment of the electromagnetic heating device provided by the utility model.

Fig. 7 is a cross-sectional view at B-B in fig. 6.

Fig. 8 is a diagram illustrating an application structure of a second embodiment of an electromagnetic heating apparatus according to the present utility model.

Reference numerals illustrate:

1-shell, 2-coil, 3-heating tube, 4-first end cover, 5-second end cover, 6-input tube, 7-output tube, 8-support ring, 9-medium, 10-through joint, 11-main heat pipe, 12-main return pipe, 13-high frequency power switch, 14-solenoid valve, 15-centrifugal pump, 16-main hot water pipe, 17-heat pipe, 18-return pipe, 19-water-cooled high frequency power supply, 20-power line, 21-water cooling block, 22-radiator, 23-shell, 24-hanging stove outlet pipe, 25-hanging stove inlet pipe, 26-hot water pump.

Detailed Description

Various exemplary embodiments of the utility model will now be described in detail, which should not be considered as limiting the utility model, but rather as more detailed descriptions of certain aspects, features and embodiments of the utility model.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the utility model described herein without departing from the scope or spirit of the utility model. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present utility model. The specification and examples are exemplary only.

The present utility model provides an electromagnetic heating device, in a specific embodiment, as shown in fig. 1, the heating device includes: the shell 1, the winding of shell 1 outer wall sets up coil 2. In the specific embodiment of the utility model, the shell 1 is a nonmetallic tube with two ends open. The preferred material of the housing 1 is PPR material or heat resistant glass fiber reinforced plastic material. When the coil 2 is electrified, the shell 1 made of nonmetal materials can avoid heat generated by the action of the shell 1 and the coil 2, so that the coil 2 is aged, and an insulating layer is damaged.

A heating tube 3, which is hollow inside, is provided in the housing 1 for generating heat by acting with the coil 2. The heating tube 3 is a pure iron tube, and the inside of the heating tube is hollow for medium 9 circulation. In addition, the housing 1 is provided with an inlet and an outlet for the input and output of the medium 9, respectively. The direction indicated by the arrow in the figure is the flow direction of the medium 9. In the specific embodiment of the utility model, the medium 9 is water or heat conducting oil, and the water or heat conducting oil is driven to flow by a water pump or gravity difference. Cold water or cold heat conducting oil flows in from an inlet and flows out from an outlet, and the working cycle is realized through a pipeline, so that heat generated by the coil 2 and the heating tube 3 is continuously taken away and is conveyed to an environment needing heat supply. The water after the coil is magnetized water, so that scaling is avoided, the cleaning in the pipeline can be kept, and the service life of the pipeline is prolonged. When the medium 9 flows inside the housing 1, the heat generating tube 3 is immersed in the medium 9, and the medium 9 flows through the inside and the outside of the heat generating tube 3, respectively. When the coil 2 and the heating tube 3 act to generate heat, the medium 9 can take away the heat generated inside and outside the heating tube 3, so that the heating efficiency is improved.

In the embodiment of the utility model, a ferromagnetic powder is also mixed in the medium 9, the ferromagnetic powder being intended to react with the coil 2 to generate heat. The ferromagnetic powder particles are extremely small, so that the ferromagnetic powder particles can be suspended in water or heat conducting oil and cannot be precipitated, the medium 9 in the shell 1 can be ensured to act with the coil 2 to generate heat, and the heat is taken away along with the medium 9 flowing in a pipeline. The water or heat conducting oil added with the ferromagnetic powder has the property of liquid magnet, under the action of the high-frequency alternating-current magnetic field in the shell 1, not only the pure iron heating pipe 3 arranged in the shell 1 is heated, but also the ferromagnetic powder uniformly dispersed in the water or heat conducting oil is heated, so that the electric-thermal conversion efficiency of the whole electromagnetic heating system is greatly improved, and meanwhile, the heating efficiency is improved. Since the gap between the outer wall of the heating tube 3 and the inner wall of the housing 1 also has the magnetic induction line generated by the coil 2, the addition of ferromagnetic powder to the medium 9 can further realize heating by utilizing the magnetic induction line of the part, and the heating efficiency is improved.

In the embodiment of the present utility model, the housing 1 and the coil 2 are both disposed in the casing 23 for protecting the housing 1 and the coil 2 and shielding electromagnetic radiation. Specifically, the back of the housing 23 has a notch, and the housing 23 is grounded for shielding and guiding away electromagnetic radiation energy generated by the coil 2. Typically, the side of the housing 23 having the notch is secured to the wall.

In the embodiment of the present utility model, as shown in fig. 1, an end opening of the housing 1 is provided with a first end cap 4 for sealing the end opening of the housing 1 and connecting the input tube 6. The other end opening of the housing 1 is provided with a second end cap 5 for sealing the end opening of the housing 1 and for connecting the output tube 7. The input pipe 6 is a pipeline for the medium 9 to enter the shell 1, and the output pipe 7 is a pipeline for the medium 9 to flow out of the shell 1 after being heated. The first end cover 4, the second end cover 5, the output pipe 6 and the output pipe 7 are made of PPR materials and are welded in a hot melting fixing mode. In this embodiment, the housing 1 is made of PPR material, and the first end cover 4 and the second end cover 5 are also fixedly connected to the housing 1 by hot-melt welding, so that the connection mode is economical and practical and the connection is stable.

In addition, at least one supporting ring 8 is fixedly arranged in the shell 1, and in this embodiment, one supporting ring 8 is respectively arranged at two ends of the heating tube 3 for fixing the heating tube 3. As shown in fig. 2, the support ring 8 has a fixing hole at the center, and at least one heat generating tube 3 is fixed in the fixing hole of the support ring 8. By fixing the plurality of heating pipes 3, the efficiency of the heating pipes 3 and the coil 2 for heating can be improved, and the heating speed of the medium 9 can be increased.

The support ring 8 also has a plurality of through holes distributed around the intermediate fixing holes for the medium 9 to circulate inside the housing 1. The medium 9 is not blocked from flowing between the housing 1 and the heat generating tube 3 while the supporting function is provided.

In another embodiment of the utility model, as shown in fig. 3, an end opening of the housing 1 is provided with a first end cap 4 for sealing the end opening of the housing 1 and connecting the input tube 6. The other end opening of the housing 1 is provided with a second end cap 5 for sealing the end opening of the housing 1. The side wall of the shell 1 is provided with a hole which is connected with an output pipe 7 for medium delivery. In this embodiment, the side wall opening of the housing 1 is preferably located near the same end of the housing 1 as the first end cap 4. The direction indicated by the arrow in fig. 3 is the flow direction of the medium 9.

In addition, the first end cap 4 has a mounting hole for mounting the through joint 10, and the input pipe 6 is fixed to one end of the through joint 10. One end of the heating tube 3 is fixedly connected with the other end of the straight-through joint 10. The through joint 10 is connected with one end of the heating tube 3, and is provided with metal threads on the inner wall, so that the through joint can be matched and connected with the fixed threads on the heating tube 3, and the heating tube 3 is convenient to detach.

The straight-through joint 10 is made of PPR material, can be fixed with the first end cover 4 through a hot-melt welding mode, and is connected with the input pipe 6 through the hot-melt welding mode.

In this embodiment, the housing 1 is made of PPR material, and the first end cover 4 and the second end cover 5 are also fixedly connected to the housing 1 by hot-melt welding, so that the connection mode is economical and practical and the connection is stable. In addition, the housing 1 made of PPR material and the output pipe 7 made of PPR material are also fixedly connected by means of hot melt welding.

In another embodiment of the present utility model, as shown in fig. 4, the heating device includes: the shell 1, the shell 1 is a nonmetallic tube with two open ends. The outer wall of the shell 1 is wound with a coil 2. The preferred material of the housing 1 is PPR material or heat resistant glass fiber reinforced plastic material. When the coil 2 is electrified, the shell 1 made of nonmetal materials can avoid heat generated by the action of the shell 1 and the coil 2, so that the coil 2 is aged, and an insulating layer is damaged.

The housing 1 is filled with a medium 9 mixed with ferromagnetic powder for generating heat by acting with the coil 2.

The housing 1 is provided with an inlet and an outlet for the input and output of a medium 9, respectively. In this embodiment, the medium 9 is preferably water or heat conducting oil, and the cooled water or heat conducting oil enters the casing 1 from the inlet and then flows out from the outlet after being heated. In addition, the ferromagnetic powder particles are extremely small, so that the ferromagnetic powder particles can be suspended in water or heat conducting oil and cannot be precipitated, the medium 9 in the shell 1 can be ensured to act with the coil 2 to generate heat, and the heat is taken away along with the medium 9 flowing in a pipeline. The water or heat conducting oil added with the ferromagnetic powder has the property of liquid magnet, and under the action of the high-frequency alternating-current magnetic field in the shell 1, the ferromagnetic powder uniformly dispersed in the water or heat conducting oil can be heated, so that the electric-thermal conversion efficiency of the whole electromagnetic heating system is greatly improved, and meanwhile, the heating efficiency is improved. The direction indicated by the arrow in the figure is the flow direction of the medium 9.

An end opening of the housing 1 is provided with a first end cap 4 for sealing the end opening of the housing 1 and for connecting an inlet pipe 6. The other end opening of the housing 1 is provided with a second end cap 5 for sealing the end opening of the housing 1 and for connecting the output tube 7.

The input pipe 6 is a pipeline for the medium 9 to enter the shell 1, and the output pipe 7 is a pipeline for the medium 9 to flow out of the shell 1 after being heated. The first end cover 4, the second end cover 5, the output pipe 6 and the output pipe 7 are made of PPR materials and are welded in a hot melting fixing mode. In this embodiment, the housing 1 is made of PPR material, and the first end cover 4 and the second end cover 5 are also fixedly connected to the housing 1 by hot-melt welding, so that the connection mode is economical and practical and the connection is stable.

The embodiment shown in fig. 4 differs from the embodiment shown in fig. 1 in that the embodiment shown in fig. 1 has a heating tube 3, whereas the embodiment shown in fig. 4 does not have a heating tube 3 inside the housing 1, but only generates heat by the action of the ferromagnetic powder mixed in the medium 9 with the coil 2.

Fig. 5 is a practical application diagram of the embodiment shown in fig. 1. In this practical application, the main heat pipe 11 is connected in parallel with the output pipes 7 of the plurality of heating devices, and the main water return pipe 12 is connected in parallel with the input pipes 6 of the plurality of heating devices. The coil 2 on each heating device is individually connected with a high-frequency power switch 13, which can be used for individually controlling each heating device. In addition, a solenoid valve 14 is provided on the inlet pipe 6 of each heating device for controlling the passage or shut-off of the medium.

When in operation, under the drive of the centrifugal pump 15, the medium water or heat conduction oil used as conduction heat or the water added with the ferromagnetic powder or the heat conduction oil added with the ferromagnetic powder passes through the plurality of electromagnetic valves 14 and the plurality of input pipes 6 through the main water return pipe 12, enters the inner cavity of the shell 1, and simultaneously, the plurality of high-frequency power switches 13 are turned on (the high-frequency power frequency is 10-40 kHz). According to the foregoing electromagnetic induction heating principle, the coil 2 heats the heat generating member 3. If the water or the heat transfer oil is mixed with the ferromagnetic powder, the coil 2 heats the ferromagnetic powder while heating the heat generating member 3. Then almost all heat is conducted to water or heat conducting oil or water added with ferromagnetic powder or heat conducting oil added with ferromagnetic powder, heated water or heat conducting oil or water added with ferromagnetic powder or heat conducting oil added with ferromagnetic powder enters a centrifugal pump 15 through an output pipe 7 and a main heat-conducting pipe 11, is conveyed to occasions needing heat through a main hot water pipe 16, and after heat is released in the occasions needing heat, cooled water or heat conducting oil or water added with ferromagnetic powder or heat conducting oil added with ferromagnetic powder enters a main water return pipe 12 again through a pipeline, so that the whole heating and heat-conducting work cycle is completed. In the aspect of control, according to the heat demand of different occasions, different numbers of electromagnetic valves 14 can be opened, different numbers of high-frequency power switches 13 are connected, and the frequency of a centrifugal pump 15 is adjusted to obtain different flow rates, so as to obtain hot water or hot oil with corresponding temperature and flow rates or hot water with ferromagnetic powder or hot oil with ferromagnetic powder.

Fig. 6 is a practical application diagram of the embodiment shown in fig. 1. In this practical application, a heating device (including a water-cooled high-frequency power supply) is mounted on one side of a radiator. Wherein the output pipe 7 of the heating device is connected with a heat pipe 17, and the input pipe 6 is connected with a water return pipe 18. The coil 2 is electrically connected with a water-cooling high-frequency power supply 19, and the water-cooling high-frequency power supply 19 is connected to a power supply through a power line 20 for supplying power.

As shown in fig. 7, a water cooling block 21 is further connected to the input pipe 6, and a water-cooled high-frequency power supply 19 is mounted to the water cooling block 21. The water-cooled high-frequency power supply 19 generates heat when in operation, and the heat is transferred to cold water in the input pipe 6 through the water cooling block 21, so that the normal operation of the water-cooled high-frequency power supply 19 is ensured. In this embodiment, the water cooling block 21 is an aluminum water cooling block, and the water cooling block 21 has a through hole therein, and the input pipe 6 is connected to two ends of the through hole respectively. I.e. the middle part of the input pipe is cut off, and two ends of the cut-off input pipe 6 are respectively connected with two ends of the through hole of the water cooling block 21.

In operation, water as a medium for conducting heat or water added with ferromagnetic powder enters the inner cavity of the shell 1 from the return pipe 18 and the input pipe 6 of the radiator 22 through the water cooling block 21 according to the principle of gravity circulation, and meanwhile, the water cooling high-frequency power supply 19 is connected (the frequency of the high-frequency power supply is 10-40 kHz). According to the foregoing electromagnetic induction heating principle, the coil 2 heats the heat generating member 3. If the ferromagnetic powder is mixed in the water, the coil 2 heats the ferromagnetic powder while heating the heat generating member 3. Then almost all heat is conducted to water or water added with ferromagnetic powder, and the heated water or water added with ferromagnetic powder passes through the output pipe 7 and the heat-conducting pipe 17 and finally flows into the radiator 22. After the hot water radiates the outside through the radiator 22, the hot water flows back to the shell 1 from the water return pipe 18 at the lower part of the radiator 22, and the heating and radiating work cycle is completed.

Fig. 8 is a practical application diagram of the embodiment shown in fig. 3. In the practical application, the heating device is arranged in the wall-mounted boiler shell 23, wherein an output pipe 7 of the heating device is connected with a wall-mounted boiler water outlet pipe 24, and a hot water pump 26 is arranged on the wall-mounted boiler water outlet pipe 24 and used for driving hot water to flow. The wall-hanging stove inlet tube 25 is connected through-hole one end on the water-cooling block, and input tube 6 is connected to the other end of through-hole. The coil 2 is electrically connected with a water-cooling high-frequency power supply 19, and the water-cooling high-frequency power supply 19 is connected to a power supply through a power line 20 for supplying power.

In operation, the water as a medium for conducting heat or water added with ferromagnetic powder is driven by the hot water pump 26 to enter the inner cavity of the shell 1 from the wall-hanging stove water inlet pipe 25, the water cooling block 21 and the input pipe 6, and meanwhile, the water cooling high-frequency power supply 19 is connected (the frequency of the high-frequency power supply is 10-40 kHz). According to the foregoing electromagnetic induction heating principle, the coil 2 heats the heat generating member 3. If the ferromagnetic powder is mixed in the water, the coil 2 heats the ferromagnetic powder while heating the heat generating member 3. Then almost all heat is conducted to water or water added with ferromagnetic powder, the heated water or water added with ferromagnetic powder enters the hot water pump 26 through the output pipe 7 and the wall-mounted boiler water outlet pipe 24, and then flows out continuously along the wall-mounted boiler water outlet pipe 24 after passing through the hot water pump 26, and is conveyed to occasions needing heat. After the heat is released in the occasion of heat demand, the cooled water or the water added with the ferromagnetic powder enters the wall-hanging stove water inlet pipe 25 again through the pipeline, and the heating and heat dissipation working cycle is completed.

The foregoing is merely illustrative of the embodiments of this utility model and any equivalent and equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this utility model.

Claims

1. An electromagnetic heating device, characterized in that the heating device comprises: the coil comprises a shell (1), wherein the shell (1) is a nonmetallic tube with two open ends, and a coil (2) is wound on the outer wall of the shell (1);

a heating tube (3) with a hollow interior is arranged in the shell (1) and is used for generating heat by acting with the coil (2);

the shell (1) is provided with an inlet and an outlet which are respectively used for inputting and outputting a medium (9);

the shell (1) and the coil (2) are arranged in a shell (23) and are used for protecting the shell (1) and the coil (2) and shielding electromagnetic radiation;

the medium (9) is mixed with ferromagnetic powder for generating heat by interaction with the coil (2).

2. Electromagnetic heating device according to claim 1, characterized in that said heating tube (3) is a pure iron tube, hollow inside for the circulation of said medium (9);

the back of the shell (23) is provided with a notch, and the shell (23) is grounded and used for shielding and guiding electromagnetic radiation energy generated by the coil (2).

3. Electromagnetic heating device according to claim 2, characterized in that the medium (9) is water or a heat conducting oil.

4. An electromagnetic heating device according to claim 2 or 3, characterized in that an end opening of the housing (1) is provided with a first end cap (4) for sealing the end opening of the housing (1) and connecting an inlet pipe (6);

the other end opening of the shell (1) is provided with a second end cover (5) for sealing the end opening of the shell (1) and connecting an output pipe (7).

5. Electromagnetic heating device according to claim 4, characterized in that at least one support ring (8) is fixedly arranged in the housing (1), the center of the support ring (8) is provided with a fixing hole, and at least one heating tube (3) is fixed in the fixing hole of the support ring (8);

the support ring (8) is also provided with a plurality of through holes for allowing the medium (9) to circulate inside the housing (1).

6. An electromagnetic heating device according to claim 2 or 3, characterized in that an end opening of the housing (1) is provided with a first end cap (4) for sealing the end opening of the housing (1) and connecting an inlet pipe (6);

the other end opening of the shell (1) is provided with a second end cover (5) for sealing the end opening of the shell (1);

the side wall of the shell (1) is provided with a hole and connected with an output pipe (7) for medium conveying.

7. Electromagnetic heating device according to claim 6, characterized in that said first end cap (4) has a mounting hole for mounting a through-connection (10), said input tube (6) being fixed at one end of said through-connection (10);

one end of the heating tube (3) is fixedly connected with the other end of the straight-through joint (10).

8. An electromagnetic heating device, characterized in that the heating device comprises: the coil comprises a shell (1), wherein the shell (1) is a nonmetallic tube with two open ends, and a coil (2) is wound on the outer wall of the shell (1);

the shell (1) is filled with a medium (9) mixed with ferromagnetic powder, and the ferromagnetic powder is used for generating heat by acting with the coil (2);

the housing (1) and the coil (2) are both arranged in a housing (23) for protecting the housing (1) and the coil (2) and shielding electromagnetic radiation.

9. Electromagnetic heating device according to claim 8, characterized in that the back of the housing (23) is notched and the housing (23) is grounded for shielding and guiding away electromagnetic radiation energy generated by the coil (2).

10. Electromagnetic heating device according to claim 9, characterized in that the housing (1) is provided with a first end cap (4) at one end opening for sealing the end opening of the housing (1) and connecting an inlet pipe (6);