KR102169709B1 - Induction heating device and heater using the same - Google Patents

Abstract

The present invention provides an induction heater for heating a fluid, comprising: a tubular heating tube comprising a fluid inlet and a fluid outlet and made of a magnetic metal; A plurality of spacers extending radially and longitudinally from the outside of the heating tube and disposed at predetermined intervals along the circumference of the side surface of the heating tube; An insulating material supported by the plurality of spacers and disposed to surround the heating tube; An induction heating coil wound around the outer circumferential surface of the insulating material; And a high-frequency generator electrically connected to the induction heating coil to generate a high-frequency AC current, wherein an air passage in a vertical direction is formed between the heating tube and the heat insulating material by the gap between the plurality of spacers. It relates to an induction heater and a heater using the same.

Description

Induction heating device and heater using the same

The present invention relates to an induction heater capable of generating heat more effectively by a high frequency induction heating method and a heater using the same.

In general, induction heating coils are used in cooking utensils, warmers, boilers, etc. to generate heat by induction heating. When an alternating current is passed through the induction heating coil, a high frequency magnetic field is generated. When a magnetic metal is introduced into the magnetic field, an eddy current is generated and heat is generated by the resistance of the metal. This heating method is referred to as high-frequency induction heating, and devices using high-frequency induction heating do not have a combustion flame and have a feature of rapidly generating heat, and thus have stability and cleanliness compared to existing devices.

However, in the case of conventional induction heaters and heaters, there was a problem that the induction heating coil itself could be damaged due to excessively high temperature of the induction heating coil during the heating process, and the heating efficiency was insufficient due to the heavy weight of the device and the complicated structure. there was.

Registered Utility Model Publication No. 20-0414996

The present invention has been devised to solve the above problems, and an object of the present invention is to provide an induction heater capable of improving heating performance, securing safety, and achieving weight reduction, and a heater using the same.

A heater using induction heating according to the present invention includes: a tank for supplying a fluid circulating in the heater; An induction heater for heating the fluid in an induction heating method; A heat exchanger for exchanging heat with the outside of the fluid heated by the induction heater; A flow pipe guiding the fluid supplied from the tank to circulate between the induction heater and the heat exchanger; A circulation pump for circulating the fluid in the flow pipe; And a controller for controlling the operation of the heater.

The induction heater accommodates the fluid and is electrically connected to the tubular heating tube made of a magnetic metal, an insulation material surrounding the side surface of the heating tube, an induction heating coil surrounding the outer peripheral surface of the insulation material, and the induction heating coil It may be characterized in that it comprises a high-frequency generator for generating a high-frequency AC current.

A case accommodating the heat exchanger and including a supply port and an exhaust port; And a blower fan configured to discharge the outside air sucked into the air supply port of the case to the outside through the exhaust port through a heat exchanger.

The flow pipe is a first pipe connected to the fluid outlet of the heating pipe to allow fluid to flow from the induction heater to the heat exchanger, and a second pipe connected to the fluid inlet of the heating pipe to flow fluid from the heat exchanger to the induction heater. Includes a tube and a third tube connecting the tank and the second tube, and the heat exchanger connects between the first tube and the second tube, and is installed on the outer surface of the heat exchange tube and the heat exchange tube bent in zigzag It may be characterized in that it includes a radiating fin.

The pump is installed in the second pipe, and is installed between the point where the second pipe and the third pipe are connected and the induction heater, and in the third pipe, the fluid is directed from the tank to the third pipe. It may be characterized in that a check valve is installed in order to flow only in the direction.

At least one of the first pipe and the second pipe may be characterized in that a temperature sensor is installed.

The air supply port may be formed at a lower portion of the case, the exhaust port may be formed at an upper portion of the case, and the blower fan may be disposed below the heat exchanger inside the case.

The case may be characterized in that it includes a curved panel that is curved toward the exhaust port from the rear surface of the case.

The first pipe may be provided with an auto air vent valve that operates to automatically discharge air to the outside when the air pressure inside the first pipe exceeds a predetermined pressure.

The induction heater or the first pipe may be characterized in that a safety valve is installed.

A flow switch for selectively opening and closing the flow of fluid may be installed in the second pipe between the circulation pump and the induction heater.

In addition, the induction heater for heating a fluid according to the present invention includes: a cylindrical heating tube including a fluid inlet and a fluid outlet and made of a magnetic metal; A plurality of spacers extending radially and longitudinally from the outside of the heating tube and disposed at predetermined intervals along the circumference of the side surface of the heating tube; An insulating material supported by the plurality of spacers and disposed to surround the heating tube; An induction heating coil wound around the outer circumferential surface of the insulating material; And a high-frequency generator electrically connected to the induction heating coil to generate a high-frequency AC current, wherein an air passage in a vertical direction is formed between the heating tube and the heat insulating material by the gap between the plurality of spacers. You can do it.

In order to smooth the flow of air in the air passage, at least one of the upper and lower portions of the air passage may be provided with a cooling fan.

A first cover disposed to cover either an upper portion or a lower portion of the air passage; And a second cover disposed to cover the other of the upper or lower portion of the air passage, wherein the cooling fan is installed in the first cover, and an air hole or the cooling fan is installed in the second cover. It can be characterized.

The fluid inlet is formed at a lower side of the heating tube, and the cooling fan is installed at a predetermined distance apart from the heating tube at a lower portion of the heating tube to suck in external air and raise the air toward the heating tube. And, in order to distribute the air raised by the cooling fan around the heating tube and guide it to the air passage, a protrusion portion protruding from the center portion toward the cooling fan is formed at a lower portion of the heating tube. have.

The heat insulating material may be characterized in that a plurality of air holes passing through the width direction of the heat insulating material are formed.

A first cover disposed to cover either an upper portion or a lower portion of the air passage; And a second cover disposed to cover the other of the upper or lower portion of the air passage, wherein the cooling fan is installed on the first cover, and the amount of air passing through the second cover on the second cover It may be characterized in that the air volume controller or the cooling fan that can be adjusted in a retractable manner is installed.

The induction heater of the heater of the present invention may be characterized in that the induction heater.

It provides a boiler for heating a heating fluid using the induction heater.

According to the induction heater and the heater using the same according to an embodiment of the present invention, the induction heating coil and the induction heater by preventing an increase in the temperature inside the heater efficiently while being able to efficiently use space and reduce weight by a simple configuration And the heater can be protected from damage, and stability and reliability can be improved.

1 is a conceptual diagram schematically showing the configuration of a heater using induction heating according to an embodiment of the present invention.
2 is a rear perspective view schematically showing a main configuration of a heater using induction heating according to an embodiment of the present invention.
3 is a perspective view showing the main configuration of an induction heater according to an embodiment of the present invention.
4 is a perspective view showing a heat exchange tube and a radiating fin of a heat exchanger according to an embodiment of the present invention.
5 is a view showing a case of a heater using induction heating according to another embodiment of the present invention.
6 is a perspective view showing an induction heater according to another embodiment of the present invention.
7 is a longitudinal sectional view of an induction heater according to another embodiment of the present invention.
8 is a cross-sectional view of an induction heater according to another embodiment of the present invention.
9 is a longitudinal sectional view of an induction heater according to a second embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings. The embodiments introduced below are provided as examples to allow the spirit of the present invention to be sufficiently transmitted to those of ordinary skill in the art. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly describe the present invention, portions irrelevant to the description are omitted from the drawings, and in the drawings, the width, length, thickness, etc. of components may be exaggerated and expressed for convenience. The same reference numerals denote the same elements throughout the specification.

1 is a conceptual diagram schematically showing the configuration of a heater using induction heating according to an embodiment of the present invention, Figure 2 is a rear perspective view showing the main configuration of a heater using induction heating according to an embodiment of the present invention 3 is a perspective view showing a main configuration of an induction heater according to an embodiment of the present invention, and FIG. 4 is a perspective view showing a heat exchange tube and a heat dissipation fin of the heat exchanger according to an embodiment of the present invention. 5 is a view showing a case of a heater using induction heating according to another embodiment of the present invention, Figure 6 is a perspective view showing an induction heater according to another embodiment of the present invention, Figure 7 is another embodiment of the present invention It is a longitudinal sectional view of an induction heater according to an embodiment, FIG. 8 is a cross-sectional view of an induction heater according to another embodiment of the present invention, and FIG. 9 is a longitudinal sectional view of an induction heater according to a second embodiment of the present invention.

As shown in FIGS. 1 to 5, the heater 1 using induction heating according to an embodiment of the present invention includes a tank 10 storing a fluid 2 such as water, and a fluid in an induction heating method. An induction heater 20 for heating, a heat exchanger 30 for exchanging heat of the heated fluid with the outside, a flow pipe for circulating fluid in the heater, and a circulation pump providing force to circulate the fluid 50, a controller 60 for controlling the respective components of the heater, a case 70 and a blower fan 80 for discharging the heat exchanged from the heat exchanger 30 to the outside, and a heater It includes a frame (90). In the embodiments of FIGS. 1 to 5, a heater including a case 70 and a blower fan 80 is used as a warmer, but this is only one embodiment and is not limited thereto, and claims of the present invention It should be understood that the range and heater described in the specification includes all devices intended for heating, such as a warmer, a heater, a stove, a boiler, and the like.

The tank 10 stores a fluid such as water and is connected to the third pipe 43 to supply a fluid circulating between the induction heater 20 and the heat exchanger 30. In one or more embodiments, the upper portion of the tank 10 may be opened, and when fluid (water) is insufficient during the operation of the heater, the fluid (water) can be easily replenished through the upper portion of the open tank 10. I can. In addition, a low water level warning device (not shown) electrically connected to the controller 80 may be installed in the tank 10. When the flow rate decreases due to insufficient fluid (2), an alarm may be generated by sound or light by the low water level warning device, and a warning signal is transmitted from the low water level warning device to the controller 60 so that the controller 60 automatically external It is possible to allow the fluid 2 to flow into the tank 10 from.

The induction heater 20 is a cylindrical heating tube 21 made of a magnetic metal, as shown in FIGS. 1 to 4 in one or more embodiments, an insulating material surrounding the side surface of the heating tube 21 ( 22), an induction heating coil 23 wound around the outer circumferential surface of the insulating material 22, and a high frequency generator 24 electrically connected to the induction heating coil 23. In one or more embodiments, the heat insulating material 22 may be formed of heat insulating ceramics having high heat resistance and not easily deformed. Ceramics are made by processing and molding non-metallic or inorganic materials at high temperatures, and ceramic insulation materials are made of natural raw materials such as diatomaceous earth or pearlite, and foamed glass heated by mixing glass powder with a foaming agent. The high frequency generator 24 generates a high frequency AC current to flow the AC current through the induction heating coil 23. As shown in FIG. 3, in a state in which a heating tube 21 made of a magnetic metal is disposed inside the induction heating coil 23, a high frequency AC current is generated by a high frequency generator 24 connected to an external power source. ), an eddy current is generated near the surface of the heating tube 21 made of a magnetic metal, and the fluid inside the heating tube 21 is heated by the heat of this loss.

The heat exchanger 30 raises the temperature of the outside air and lowers the temperature of the fluid by exchanging heat of the heated fluid with outside air. In one or more embodiments, the heat exchanger 30 is a heat exchange tube 31 and a thin copper plate bent in a zigzag so that the heated fluid can pass while heat exchange, as shown in FIGS. 1 and 4. In order to increase the heat dissipation area, a heat dissipation fin 32 may be disposed around the heat exchange tube 31 in a fin shape. The heat exchanger is a well-known technology, and is not limited to the embodiments shown in FIGS. 1 to 4, and various types of known heat exchangers and various types of heat exchangers may be used.

The flow pipe is a pipe through which the fluid 2 supplied from the tank 10 flows, and as shown in FIG. 1 in one or more embodiments, the fluid flows from the induction heater 20 to the heat exchanger 30. The first pipe 41 connected to the fluid outlet 211 of the heating pipe 21, the fluid inlet 212 of the heating pipe 21 so that the fluid flows from the heat exchanger 30 to the induction heater 20 It may include a connected second pipe 42 and a third pipe 43 connecting the tank 10 and the second pipe 42. The fluid supplied from the tank 10 moves downward along the third pipe 43, and is guided by moving by the pressure of the circulation pump 50 along the second pipe 42 connected to the third pipe 43. It is heated in the heater 20. The fluid heated in the induction heater 20 rises along the first pipe 41 and flows into the heat exchanger 30 connected to the first pipe 41 to exchange heat with the outside air in the heat exchanger 30. After the heat exchange, the fluid whose temperature is lowered flows out of the heat exchanger 30 and moves back to the induction heater 20 along the second pipe 42 so that the fluid continues to circulate inside the heater of the present invention. In one or more embodiments, the diameter of the flow pipes 41, 42, and 43 may be formed to be about 1/5 of the diameter of the heating pipe 21.

A safety valve 413 may be installed in the first pipe 41 adjacent to the fluid outlet 211 of the induction heater 20. The safety valve 413 automatically operates when the pressure of a device or a pipe exceeds a certain pressure to discharge steam to prevent an increase in pressure. In the case of the heater 1 of the present invention, since the pressure is controlled by the controller 60 as a whole, the safety valve 413 rarely operates, but when the pressure rises abnormally due to a failure of the controller 60, the pressure It is installed to escape. In the embodiment of FIG. 1, the safety valve 413 is installed in the first pipe 41 adjacent to the fluid outlet 211 of the induction heater 20, but in another embodiment, the safety valve 413 is the first pipe ( Instead of being installed on 41), it may be installed on the top of the heating tube 21 (not shown).

An automatic air vent valve 412 may be installed in the first pipe 41. When air is mixed in the heat exchanger pipe 31 of the heat exchanger 30, the heat dissipation ability is lowered. To prevent this, the first pipe 41 automatically removes air from the heat exchanger 30 or the flow pipe. A discharge valve 412 is installed. In one or more embodiments, the first pipe 41 may be disposed at a higher position than the second pipe 42, and since the air moves to a higher position inside the flow pipe, it is automatically placed at the top end of the first pipe 41. An air discharge valve 412 may be installed. In one or more embodiments, a float type automatic air discharge valve may be used that removes air by opening the valve by lowering the water surface when the fluid mixed with air flows.

A first temperature sensor 411 may be installed in the first tube 41. In one or more embodiments, the first temperature sensor 411 may be disposed in the first pipe 41 between the automatic air discharge valve 412 and the heat exchanger 30. By this arrangement, since the first temperature sensor 411 measures the temperature of the fluid (water) from which air is excluded by the automatic air discharge valve 412, the temperature of the fluid can be more accurately measured. The first temperature sensor 411 measures the temperature of the fluid (water) before flowing into the heat exchanger 30 and transmits the measured temperature value to the controller 60.

In the second pipe 42, a second temperature sensor 421, a circulation pump 50, and a flow switch 422 may be installed. In one or more embodiments, the second temperature sensor 421 may be installed between the point where the second pipe 42 and the third pipe 43 are connected and the circulation pump 50. By installing in this way, it is possible to accurately measure the temperature of the fluid in a state in which the fluid whose temperature has decreased after heat exchange in the heat exchanger 30 and the fluid supplied from the third pipe 43 are mixed. The flow switch 422 may be installed between the circulation pump 50 and the induction heater 20. The flow switch 422 detects the name when there is no flow of the flow in the second pipe 42 or when the amount drops significantly or reaches the set value, and sends a signal to the controller 60, whereby the flow rate is insufficient or there is no fluid. When the controller 60 stops the operation of the induction heater 20 and other devices, the occurrence of fire and energy is saved.

A check valve 431 may be installed in the third pipe 43. The check valve 431 prevents from rising to the tank 10 by flowing back from the second pipe 42 to the third pipe 43 in the process of circulating fluid in the heater by the pressure of the circulation pump 50, and , Make the fluid flow only downward from the tank 10 in the direction of the second pipe 42.

The circulation pump 50 is installed upstream of the fluid inlet 212 of the induction heater 20 in the second pipe 42. The circulation pump 50 pressurizes the fluid so that the fluid circulates in the flow pipe and is controlled by the controller 60. The fluid flowing in through the third pipe 43 from the tank 10 and the fluid flowing through the second pipe 42 after passing through the heat exchanger 30 are mixed and together by the circulation pump 50 After flowing into the induction heater (212), the induction heater (20), the first pipe (41) and the heat exchanger (30) are sequentially passed to return to the circulation pump (50), and by the operation of the circulation pump (50). The circulation of this fluid continues. Therefore, in the case of the present invention, since the fluid supplied once is continuously circulated and not lost in the heater, there is no need to continuously receive the fluid from the outside while the heater is operating. Therefore, according to the present invention, it is possible to save fluid, and if the fluid becomes insufficient due to evaporation or the like due to continuous operation, the tank 10 can be replenished with the fluid 2 at that time. When the flow rate decreases due to insufficient fluid 2 in the tank 10, the signal is transmitted to the controller 60 and the controller 60 can automatically control the fluid 2 to flow into the tank 10 from the outside. have.

The controller 60 is for controlling the operation of each device of the heater of the present invention as a whole, and in one or more embodiments, the second tube 42 in the form of a control panel as shown in FIG. 1 It may be installed between the and the frame 90. According to an embodiment of the present invention, since the low-temperature fluid flows through the lower second pipe 42 and the high-temperature fluid heated by the induction heater 20 moves upward, the controller 60 is By installing between the tube 42 and the frame 90, the temperature of the controller 60 can be kept relatively low. Meanwhile, a separate cooling fan may be installed on the frame 90 in order to further lower the temperature of the controller 60.

The controller 60 includes a tank 10, an induction heater 20, a first temperature sensor 411, a second temperature sensor 421, a blowing fan 80, a circulation pump 50, and a flow switch 422. It is electrically connected to various devices such as. In one or more embodiments, when the tank 10 is short of fluid, when the signal is transmitted from the tank 10 to the controller 60, the controller 60 operates to automatically replenish the fluid to the tank 10 from the outside. Can be ordered to do. In addition, the controller 60 determines that the device is overheated when the fluid temperature measured by the first temperature sensor 411 rises above a predetermined temperature (for example, 90 degrees Celsius), thereby reducing the thermal power of the high frequency generator 24. It is possible to lower or stop the operation of the induction heater 20. Conversely, when the fluid temperature measured by the second temperature sensor 421 falls below a predetermined temperature (for example, 40 degrees Celsius), the high frequency generator 24 ) By increasing the thermal power of the fluid, or by stopping the operation of the blower fan 80 so that the temperature of the fluid does not decrease. By the operation of the controller 60, the temperature of the fluid in the heater may circulate while being maintained at an appropriate temperature. In addition, the controller 60 can also control the operation of the circulation pump 50, and the circulation pump 50 is not operated due to a failure or the like, so that the flow of fluid is stopped or the flow pipe is damaged. When a signal indicating that there is no flow or the amount has dropped significantly is commanded to stop the induction heater 20 or the blowing fan 80, energy can be saved and a fire can be prevented.

The case 70 accommodates the heat exchanger 30, includes an air supply port 72 and an exhaust port 71, and a blower fan 80 is installed inside the case 70. In one or more embodiments, as shown in FIG. 1, a supply port 72 is installed at a lower portion of the front portion of the case 70, and an exhaust port 71 is installed at an upper portion of the front portion, and the supply port 72 and A heat exchanger (30) is disposed in the inner space of the case (70) between the exhaust ports (71), and a blower fan (80) is disposed under the heat exchanger (30) to blow the outside air flowing from the air supply port (72) upward. By raising it, it may be arranged so that the outside air passes through the heat exchanger 30 and is discharged to the exhaust port 71 at the top. This is configured so that hot air is smoothly discharged from the heater by using the principle that the heated air rises upward. At this time, in order to allow the hot air to be more smoothly discharged through the exhaust port 71 of the case 70, the air coming up from the lower side of the case 70 naturally flows through the exhaust port 71 as shown in FIG. A curved panel 73 that is bent so as to be guided in the direction may be additionally disposed. In the embodiment of FIG. 1, since the temperature of the upper part inside the case 70 must be higher than the temperature of the lower part, the first pipe 41 of the flow pipe through which the high-temperature fluid flows enters through the upper part of the rear part of the case 70 to heat exchange. It is connected to the inlet side of the heat exchange tube 31 of the machine 30 to guide the fluid into the case 70, and the second tube 42 of the flow tube through which the low-temperature fluid flows is the lower part of the rear part of the case 70. It is connected to the outlet side of the heat exchange tube 31 through and guides the fluid to the outside of the case 70. The first pipe 41, the second pipe 42, the third pipe 43, and the heat exchange pipe 31 are separated for convenience and are preferably formed as an integral pipe. A filter 721 is disposed in the air supply port 72 of the case 70 to filter foreign substances mixed with the air introduced from the outside. Meanwhile, a wind direction and air volume guide 711 for adjusting the amount and direction of the hot air discharged may be installed at the exhaust port 71 of the case 70. In one or more embodiments, the wind direction and air volume control guide 711 is disposed at an exhaust port of a conventional warmer or air conditioner, and substantially rectangular-shaped panels are arranged side by side at predetermined intervals so that the panels rotate at the same time by a rotating operation. Therefore, it is the same as the wind direction and air volume control guide that is to open or close the exhaust port as much as desired. Accordingly, the wind direction and air volume guide 711 may be manually adjusted, or the wind direction and air volume control guide 711 may be configured to operate automatically by a signal from the controller 60 according to an external input.

5 shows a case 70 of a heater according to another embodiment of the present invention. In the embodiment of FIG. 5, the configurations other than the wind direction and the air volume guide are all the same as the configuration of the case 70 of the heater of the embodiment of FIG. In the embodiment of Figure 5, the wind direction and air volume control guide is composed of an upper guide 712 and a lower guide 713, so that the upper guide 712 and the lower guide 713 can guide the wind direction in different directions. Is composed. In one or more embodiments, the upper guide 712 may be configured to face forward, and the lower guide 713 may be configured to be inclined downward to guide the wind direction downward. In this configuration, the warm air is discharged from the heater to the outside by the upper guide 712, and at the same time, a part of the warm air is guided toward the air supply port 72 located below by the lower guide 713. The warm air, which has moved downward by the lower guide 713, flows back into the case 70 through the air supply port 72, passes through the blower fan 80 and the heat exchanger 30, and the exhaust port in a state in which the temperature is further increased. It is blown in the direction of (71). Since the exhaust port 71 includes an upper guide 712 and a lower guide 713, some of the warm air is guided in the direction of the air supply port 72 in the lower part, and thus, the temperature of the outside air may increase in a short time as this process is repeated.

The frame 90 is a part that fully supports the heater of the present invention from the bottom, and in one or more embodiments, the frame 90 may be formed in a rectangular shape, and the rollers 91 are each at the four corners of the frame 90. It is installed so that the heater 1 can be moved freely.

6 to 8 illustrate an induction heater 20 according to an embodiment different from that of FIG. 1. Hereinafter, detailed descriptions of the same components as those of the induction heater 20 of FIG. 1, such as the fluid inlet 212, the fluid outlet 211, the induction heating coil 23, and the high frequency generator 24, are omitted. And it will be described focusing on differences from the embodiment of FIG. 1.

The induction heater 20 according to the embodiment shown in FIGS. 6 to 8 includes a fluid inlet 212 and a fluid outlet 211 and includes a cylindrical heating tube 21 made of a magnetic metal, and a heating tube Four spacers 25 extending radially and longitudinally from the outer side of the heating tube 21 and disposed at an interval of 90 degrees along the circumference of the side surface of the heating tube 21, and the four spacers 25 A high frequency alternating current is electrically connected to the heat insulator 22 supported by and arranged to surround the heating tube 21, the induction heating coil 23 and the induction heating coil 23 wound around the outer circumferential surface of the heat insulator 22 It includes a high-frequency generator 24 for generating. Since the four spacers 25 are disposed on the outer periphery of the heating tube 21 at intervals of 90 degrees, the heat insulating material 22 and the heating tube 21 are generally spaced apart from each other, and the gap between the adjacent two spacers 25 Thus, an air passage 28 through which air can flow in the vertical direction is formed between the heating pipe 21 and the heat insulating material 22. Therefore, as shown in Figure 8 (a), in the case of the induction heater 20 according to another embodiment of the present invention, a total of four air passages 28 between the heating tube 21 and the heat insulating material 22 Is formed. In addition, a first cover 27 having an open cylindrical shape covers the lower part of the four air passages 28, and a cooling fan 271 is installed under the first cover 27 to suck outside air. Thus, it is raised in the direction of the four air passages 28. Meanwhile, a second cover 26 having a cylindrical lid shape with an open lower portion covers the upper portions of the four air passages 28, and the fluid outlet 211 extends to the outside through the center of the second cover 26. . A plurality of air holes 261 are formed on the upper surface of the second cover 26 so that the air raised through the air holes 261 is discharged to the outside through the plurality of air holes 261. However, in the modified embodiment, instead of the plurality of air holes 261, one or more cooling fans are additionally installed on the upper surface of the second cover 26 to more smoothly move the air coming up through the air passage 28 to the outside. It can also be configured to discharge. The first cover 27 and the second cover 26 are respectively installed on the lower and upper portions of the air passage 28, so that the outside air introduced by the cooling fan 271 is not distributed to other places, and only the heating tube 21 It flows only through the four air passages 28 between the and the insulating material 22. Therefore, it is possible to prevent damage to the induction heating coil 23 by more effectively preventing the heat of the heating tube 21 from being transferred to the induction heating coil 23.

In addition, in a modified embodiment, as shown in FIG. 8 (b), four spacers 25 may be integrally formed with the heat insulating material 22. In this case, there is no need to separately provide and install the spacer 25, and the air passage 28 is formed by the spacer 25 integrally formed with the heat insulating material 22 by inserting the heat insulating material 22 into the heating tube 21 do. Since the spacer 25 is integrally formed with the heat insulating material 22 and is inserted into the heating tube 21 together, each spacer 25 is installed on the heating tube 21 and then the heat insulating material 22 is installed. Compared to that, there is an advantage that the error of the spacing between the heating tube 21 and the heat insulating material 22 is reduced. Accordingly, the distance between the heating tube 21 and the induction heating coil 23 wound around the outer circumferential surface of the heat insulating material 22 becomes uniform as a whole, so that the heating tube 21 is more evenly formed by the induction heating coil 23. Heated.

Meanwhile, in the embodiment of FIG. 7, the fluid inlet 212 is formed to be bent in a'b' shape from the lower surface of the heating tube 21 to extend outward through the side surface of the first cover 27. This is to prevent a portion of the air passage 28 formed by the spacer 25 from being directly blocked by the fluid inlet 212 and obstructing the flow of air. However, the present invention is not limited thereto, and of course, if necessary, the fluid inlet 212 may extend from the lower side of the heating tube 21 to the outside as shown in FIG. 1.

In the induction heater 20 according to the embodiment of FIGS. 6 to 8, the fluid inlet 212 is connected to the second pipe 42 instead of the induction heater 20 of FIG. 1 in the embodiment of FIG. By connecting the fluid outlet 211 to the first pipe 41, it may be used as a fluid heating device for a warmer, and further, it may be used as a fluid heating device for a boiler.

9 illustrates an induction heater 20 according to an embodiment different from FIGS. 1 and 6 to 8. Hereinafter, the fluid inlet 212, the fluid outlet 211, the induction heating coil 23, the high frequency generator 24, a plurality of spacers 25, the first cover 27, the second cover 26, the cooling fan (271), etc. For the same configurations as those of the induction heater 20 of FIGS. 1 and 6 to 8, detailed descriptions are omitted, and differences from the embodiment of FIG. 1 and the embodiments of FIGS. 6 to 8 Explain mainly.

The induction heater 20 according to the embodiment of FIG. 9 includes a fluid inlet 212 and a fluid outlet 211, similar to the embodiments of FIGS. 6 to 8, and includes a cylindrical heating tube 21 made of a magnetic metal. ), a plurality of spacers 25 extending radially and longitudinally from the outside of the heating tube 21 and disposed at predetermined intervals along the circumference of the side surface of the heating tube 21, and a plurality of spacers 25 ) Is supported and arranged to surround the heating tube 21, the induction heating coil 23 and the induction heating coil 23 wound around the outer circumferential surface of the insulator 22 and electrically connected to It includes a high-frequency generator 24 for generating an electric current, and an air passage 28 in the vertical direction is formed between the heating tube 21 and the heat insulating material 22 by the gap between the plurality of spacers 25, and the air passage A first cover 27 and a cooling fan 271 are disposed below the furnace 28, and a second cover 26 is disposed above the air passage 28. In the longitudinal cross-sectional view of the induction heater 20 shown in FIG. 9, the spacer 25 is not shown. For convenience of explanation, the cross-section of the longitudinal cross-sectional view of FIG. 9 is not a part where the spacer 25 is located, but an air passage ( This is because it is cut along the portion where 28) is located, and in the embodiment of FIG. 9, as in the embodiment of FIG. 8, four spacers 25 are arranged at an angle of 90 degrees.

Unlike the embodiments of FIGS. 6 to 8, in the induction heater 20 according to the embodiment of FIG. 9, a plurality of air holes 221 penetrating the width direction are formed in the heat insulating material 22, and the second cover Instead of the air hole 261 in 26, an air volume regulator 262 is installed. The air volume controller 262 may be of any configuration as long as it operates in an open/closed manner to control the amount of air passing through the second cover 26. In one or more embodiments, the air volume controller 262 is disposed at an exhaust port of a conventional warmer or air conditioner, and substantially rectangular-shaped panels are arranged side by side at predetermined intervals, and the panels rotate simultaneously by a rotation operation to thereby close the exhaust port. It is the same as the wind direction and air volume control guide that is open or closed as desired. In one or more embodiments, the air volume controller 262 may be configured of four and may be respectively installed at the positions of the second covers 26 facing the four air passages 28 shown in FIG. 8. The outside air raised by the cooling fan 271 under the induction heater 20 is discharged to the top through the air volume controller 262 of the second cover 26 and at the same time, a plurality of air holes 221 formed in the insulating material 22 ) Through the heat insulating material 22 is also discharged to the side. Accordingly, the induction heating coil 23 wound around the outer circumferential surface of the heat insulating material 22 can be cooled more directly. When the temperature of the induction heating coil 23 needs to be rapidly lowered, the air volume controller 262 installed in the second cover 26 is closed to completely close the second cover 26 by the cooling fan 271 from the bottom. All of the introduced outside air is discharged only to the side of the heat insulating material 22 through the air hole 221 of the heat insulating material 22, whereby the induction heating coil 23 wound around the heat insulating material 22 can be cooled more quickly.

In addition, unlike the embodiments of FIGS. 6 to 8, in the case of the induction heater 20 according to the embodiment of FIG. 9, the fluid inlet 212 is formed on the lower side of the heating tube 21, and the second cover The heating pipe 21 of the induction heater 20 to smoothly guide the air raised by the cooling fan 271 installed in 26 to the four air passages 28 by dispersing the surroundings of the heating pipe 21 A protrusion 213 protruding from the center portion in the direction of the cooling fan 271 is formed at the bottom of the unit. In one or more embodiments, when the heating tube 21 is a cylindrical heating tube 21, the protrusion 213 may protrude downward from the lower surface of the heating tube 21 in a hemispherical or conical shape, and the heating tube 21 The lower surface itself may have a shape of a protrusion 213 protruding in a hemispherical or conical shape. The cooling fan 271 of the second cover 26 is preferably disposed in the same direction as the heating tube 21 and the central axis immediately below the cylindrical heating tube 21, and at this time, the cooling fan of the second cover 26 When the outside air rises upward by 271, the outside air is evenly distributed from the central portion of the lower portion of the heating tube 21 to the peripheral portion by the protrusion 213 of the heating tube 21, and smoothly passes through the four air passages 28. Air can flow.

In addition, unlike the embodiments of FIGS. 6 to 8, in the case of the induction heater 20 according to the embodiment of FIG. 9, a temperature sensor 222 for measuring the temperature is installed on the outer peripheral surface of the insulation material 22, The temperature sensor 222, the air volume controller 262, and the cooling fan 271 are connected to the controller 60, respectively, so that the temperature outside the insulation material 22 measured by the temperature sensor 222 rises above a predetermined temperature. In this case, the controller 60 increases the number of revolutions of the cooling fan 271, closes the air volume controller 262, or commands to close the air volume controller 262 together with the increase in the number of revolutions of the cooling fan 271. It is possible to quickly lower the temperature of the induction heating coil 23 automatically according to the situation.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and is generally used in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications are possible by those skilled in the art of course, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

1: heater 20: tank
20: induction heater 21: heating tube
22: insulation 23: induction heating coil
24: high frequency generator 25: spacer
30: heat exchanger 31: heat exchange tube
32: radiating fin 41: first tube
42: Hall 2 43: Hall 3
50: circulation pump 60: controller
70: case 80: blower fan
90: frame

Claims (19)

In the induction heater for heating the fluid,
A cylindrical heating tube comprising a fluid inlet and a fluid outlet and made of a magnetic metal;
A plurality of spacers extending radially and longitudinally from the outside of the heating tube and disposed at predetermined intervals along the circumference of the side surface of the heating tube;
An insulating material supported by the plurality of spacers and disposed to surround the heating tube;
An induction heating coil wound around the outer circumferential surface of the insulating material; And
A high frequency generator electrically connected to the induction heating coil to generate a high frequency alternating current current; and
An air passage in the vertical direction is formed between the heating tube and the heat insulating material by the gap between the plurality of spacers,
A first cover disposed to cover either an upper portion or a lower portion of the air passage; And
Including; a second cover disposed to cover the other one of the upper or lower portion of the air passage,
An induction heater, characterized in that a cooling fan for smoothing the flow of air in the air passage is installed in the first cover, and an air hole is formed in the second cover. The method of claim 1,
The fluid inlet is formed in a lower side portion of the heating tube,
The cooling fan is installed to be spaced apart from the heating tube by a predetermined interval at a lower portion of the heating tube to suck outside air and raise the air toward the heating tube,
Induction heater, characterized in that the lower portion of the heating tube is formed with a protrusion protruding from the center portion toward the cooling fan in order to distribute the air raised by the cooling fan around the heating tube to guide the air passage. . In the induction heater for heating the fluid,
A cylindrical heating tube comprising a fluid inlet and a fluid outlet and made of a magnetic metal;
A plurality of spacers extending radially and longitudinally from the outside of the heating tube and disposed at predetermined intervals along the circumference of the side surface of the heating tube;
An insulating material supported by the plurality of spacers and disposed to surround the heating tube;
An induction heating coil wound around the outer circumferential surface of the insulating material; And
A high frequency generator electrically connected to the induction heating coil to generate a high frequency alternating current current; and
An air passage in the vertical direction is formed between the heating tube and the heat insulating material by the gap between the plurality of spacers,
An induction heater, characterized in that the heat insulating material has a plurality of air holes penetrating the width direction of the heat insulating material. In the heater using induction heating,
A tank for supplying a fluid circulating in the heater;
An induction heater for heating the fluid in an induction heating method;
A heat exchanger for exchanging heat with the outside of the fluid heated by the induction heater;
A flow pipe guiding the fluid supplied from the tank to circulate between the induction heater and the heat exchanger;
A circulation pump for circulating the fluid in the flow pipe; And
A controller for controlling the operation of the heater;
Including,
The heater using induction heating, characterized in that the induction heater is the induction heater according to any one of claims 1 to 3. The method of claim 4,
The flow pipe is a first pipe connected to the fluid outlet of the heating pipe to allow fluid to flow from the induction heater to the heat exchanger, and a second pipe connected to the fluid inlet of the heating pipe to flow fluid from the heat exchanger to the induction heater. A pipe and a third pipe connecting the tank and the second pipe,
The heat exchanger includes a heat exchange tube connected between the first tube and the second tube and bent in a zigzag pattern, and a radiating fin installed on an outer surface of the heat exchange tube. The method of claim 5,
The circulation pump is installed in the second pipe, and is installed between the point where the second pipe and the third pipe are connected and the induction heater,
A heater using induction heating, characterized in that a check valve is installed in the third pipe so that the fluid flows only in a direction from the tank toward the third pipe. A boiler for heating the heating fluid using the induction heater according to any one of claims 1 to 3.
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