JP2013145639A - Electric warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric hot water supply device which has maintainability and is excellent in water heating efficiency.SOLUTION: An electric warmer 1 includes: a suction port 2 which suctions a fluid supplied from a pipeline; a heating part 7 heating the fluid suctioned from the suction port 2; a control part 5 controlling the heating part 7; and a discharge port 3 discharging the fluid heated by the heating part 7. The electric warmer 1 uses electromagnetic induction heating in the heating part 7. The heating part 7 includes: a cover 16 made of an insulation material; a pipe 14 disposed in the cover 16 and formed by a magnetic material metal; and multiple baskets 15 which are disposed in the pipe 14, are formed by the magnetic material metal, and allow the fluid to pass through. A heating coil 6 is spirally wound around an outer peripheral part of the cover 16 and covers the cover 16.

Description

  The present invention relates to a suction port for sucking a fluid supplied from a pipe, a heating unit for heating the fluid sucked from the suction port, a control unit for controlling the heating unit, and discharging the fluid heated by the heating unit. In the electric heater using the electromagnetic induction heating for the heating unit, the heating unit includes a cover made of an insulating material, a pipe made of a magnetic metal inside the cover, and an inside of the pipe And a plurality of scissors that allow a fluid made of a magnetic metal to pass therethrough, and relates to an electric heater that winds and covers a heating coil around the outer periphery of the cover.

  There are two types of water heaters that heat water and supply it as hot water, using gas and using water. By using gas, water can be warmed quickly, and the temperature of hot water can be supplied in a stable state. In addition, there is no hot water storage tank, and there is an advantage that it does not take up space for installation. However, since the thing by gas requires oxygen in the air at the time of combustion, when using it indoors, in order to prevent the poisoning and accident of gas explosion by incomplete combustion, ventilation of room air is required.

On the other hand, those using electricity take time to warm water, and the amount of hot water that can be used at one time is also limited, so it is difficult to supply hot water continuously. This is because, when electricity is used, the system generally warms the water in the tank.
Here, some hot water heaters using electricity are safe and highly efficient, and in order to continuously supply hot water, electromagnetic induction heating by a coil is used for heating water.

  For example, in patent document 1 (Unexamined-Japanese-Patent No. 2010-71548), the heating part is comprised with the tank of the insulator, the heating coil which covers the circumference | surroundings, and the to-be-heated body of a magnetic body metal in a tank. .

JP 2010-71548 A

  However, in the structure as in Patent Document 1, since the magnetic metal heated by electromagnetic induction is only installed inside the tank, the heat generation efficiency is poor, and the advantages of heating by electromagnetic induction can be fully utilized. The loss of electricity used is large. There is also a problem that the maintenance inside the tank is poor, such as removal of deposits such as the inner wall of the tank and replacement of magnetic metal installed inside the tank.

  Accordingly, an object of the present invention is to provide an electric heater having maintainability and excellent heating efficiency.

  For this reason, the invention described in claim 1 is a suction port that sucks fluid supplied from a pipe, a heating unit that heats fluid sucked from the suction port, a control unit that controls the heating unit, and the heating unit. In the electric heater using the electromagnetic induction heating for the heating unit, the heating unit includes a cover made of an insulating material, and a magnetic metal inside the cover. And a plurality of scissors that allow a fluid made of a magnetic metal to pass through the inside of the pipe, and a heating coil is wound around and covered around the outer periphery of the cover.

  The invention described in claim 2 is characterized in that water is used as the fluid.

  The invention according to claim 3 is characterized in that the ridge has a plurality of holes formed in the top plate, or flat plates and corrugated plates made of a magnetic metal are arranged alternately in parallel with the flow path direction. To do.

  The invention described in claim 4 is characterized in that a filter medium is disposed inside the basket.

  According to a fifth aspect of the present invention, a rod-shaped member made of a magnetic metal is installed in the pipe in parallel with the flow path direction, and the rod-shaped member penetrates the plurality of rods to support each rod. It is characterized by being.

  According to the first aspect of the present invention, the suction port for sucking the fluid supplied from the pipe, the heating unit for heating the fluid sucked from the suction port, the control unit for controlling the heating unit, and the heating unit In the electric heater using the electromagnetic induction heating for the heating unit, the heating unit includes a cover made of an insulating material and a magnetic metal inside the cover. And a plurality of scissors that allow a fluid made of a magnetic metal to pass through the inside of the pipe, and a heating coil is wound around the outer periphery of the cover in a spiral shape so that the fluid can be indirectly heated. In addition to preventing leakage of electricity to the fluid due to the insulation deterioration of the heater, the contact area between the fluid and the object to be heated is widened because the object to be heated is a pipe and a soot in the pipe, and heat conduction to the fluid is improved. Improved heating efficiency That.

  According to invention of Claim 2, since water is used for the said fluid, it can be used as an electric water heater.

  According to the invention of claim 3, the ridges are formed with a plurality of holes in the top plate, or flat plates and corrugated plates made of magnetic metal inside are alternately arranged in parallel with the flow path direction. The contact area between the fluid and the object to be heated is increased, heat conduction to the fluid is improved, and heating efficiency is improved.

  According to invention of Claim 4, since a filter medium is arrange | positioned inside the said cage | basket, purification of a fluid can be performed with the heating of a fluid.

  According to the invention described in claim 5, a rod-shaped member made of a magnetic metal is installed in the pipe in parallel with the flow path direction, and the rod-shaped member penetrates the plurality of rods to support each rod. Therefore, the contact area between the fluid and the object to be heated is widened, the heat conduction to the fluid is improved, and the heating efficiency is improved.

It is a functional block diagram of an electric heater showing an example of the present invention. It is a perspective view of the heating part of an electric warmer which shows an example of the present invention. It is a perspective view which shows the structure of the heating part of the electric warmer which shows an example of this invention. It is sectional drawing of the heating part of the electric warmer which shows an example of this invention. It is a perspective view of a bag showing an example of the present invention. It is a front view of a bag showing an example of the present invention. It is a sectional view of a bag showing an example of the present invention. It is a perspective view of a bag showing an example of the present invention. It is a front view of a bag showing an example of the present invention. It is sectional drawing of the heating part of the electric warmer which shows an example of this invention. It is sectional drawing of the heating part of the electric warmer which shows an example of this invention. It is sectional drawing of the heating part of the electric warmer which shows an example of this invention.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a functional block diagram of an electric warmer showing an example of the present invention, FIG. 2 is a perspective view of a heating unit of the electric warmer showing an example of the present invention, and FIG. 3 shows an example of the present invention. FIG. 4 is a perspective view showing the configuration of the heating unit of the electric warmer, FIG. 4 is a cross-sectional view of the heating unit of the electric heater, showing an example of the present invention, and FIG. FIG. 6 shows an example of the present invention, a front view of the bag, FIG. 7 shows an example of the present invention, a cross-sectional view of the bag, FIG. 8 shows an example of the present invention, a perspective view of the bag, and FIG. FIG. 10 is a cross-sectional view of a heating part of an electric warmer showing an example of the present invention, and FIG. 11 is a cross-sectional view of a heating part of an electric warmer showing an example of the present invention. FIG. 12 and FIG. 12 are cross-sectional views of the heating portion of the electric heater, showing an example of the present invention.

The electric heater main body 1 of the present invention using water as an example of a fluid includes, for example, a suction port 2 for sucking water supplied from a pipe and water sucked from the suction port 2 as shown in FIG. The heating part 7 to heat, the control part 5 which controls the heating part 7, and the discharge port 3 which discharges the water heated by the heating part 7 are provided.
The water absorbed from the water intake port 2 flows into the heating unit 7 by the pump 8, is heated by the heating unit 7, and flows to the discharge port 3.
In addition, a filter, a safety valve, a water pressure meter, a flow meter, a water temperature meter, a rectifier, etc. may be installed in the middle of the water circuit. Water flows into the heating unit 7 and drains the water heated by the heating unit 7. If it is possible to flow to the outlet 3, the circuit configuration is not limited to the above and can be arbitrarily designed.
Moreover, although water can be used as an electric water heater by using water as the fluid, the fluid is not limited to water, and various fluids such as oil can be used.

  The high frequency current generation circuit 4 using the AC power supply 10 causes the high frequency current to flow through the heating coil 6 in accordance with control by the control unit 5. The high frequency current generates a magnetic force in the heating coil 6 to generate a magnetic force line. An eddy current is generated in the magnetic metal in the heating section 7 by the magnetic lines, and Joule heat is generated by the electric resistance of the magnetic metal, and the magnetic metal self-heats. Therefore, the magnetic metal is an object to be heated by induction heating, and heats water by bringing water into contact with the heated magnetic metal.

As shown in FIGS. 2 to 4, for example, the heating unit 7 includes a lid 13 having an inflow port 17, a pipe 14 made of a magnetic metal, and a plurality of baskets 15 capable of circulating water made of a magnetic metal. A cover 16 made of an insulator and a buffer member 21, and a plurality of flanges 15 having an outer diameter substantially the same as the inner diameter of the pipe 14 is disposed inside the pipe 14, and the outer peripheral portion of the pipe 14 is covered with the cover 16. The heating coil 6 is configured so as to cover the cover 16 in a spiral shape. The outer diameter of the lid 13 is joined to the pipe 14 by a screw structure having a sealing property, and the lid 13 is fastened via the buffer member 21. A plurality of ridges 15 are fixed.
The joining of the lid 13 and the pipe 14 is not limited to the above as long as it has a sealing property, and can be arbitrarily designed.
Further, the fixing of the plurality of scissors 15 is not limited to the above as long as the plurality of scissors 15 are sequentially stacked in the water flow direction, and the plurality of scissors 15 are connected to each other. May be arbitrarily designed.

  The water sucked from the suction port 2 enters the pipe 14 from the inlet 17 in the lid 13, passes through the plurality of eaves 15 installed in the pipe 14, and flows from the outlet 18 to the outlet 3. . The outer shape of the lid 13 is rectangular in consideration of detachability from the pipe 14 at the time of maintenance when the lid 13 and the pipe 14 have a screw structure, but it is sufficient that the lid 13 can be detached from the pipe 14. The shape is not limited to the above, and may be a circle or a polygon.

  Here, the pipe 14 and the plurality of rods 15 made of a magnetic metal are heated to be heated by induction heating, and water is heated by the contact between the heated pipes 14 and the plurality of rods 15 and water.

  The pipe 14 is made of a magnetic metal, has a cylindrical shape as shown in FIGS. 3 and 4, and has a structure in which a plurality of ridges 15 are installed. The shape is not limited to a cylindrical shape, and may be a square tube or a polygonal tube, and can be arbitrarily designed as long as a plurality of flanges 15 can be arranged inside the pipe 14.

  As shown in FIGS. 3 to 7, the flange 15 has a cylindrical shape whose outer diameter is substantially the same as the inner diameter of the pipe 14, has no bottom surface, and has numerous holes 20 formed in the top plate 19. The water passes through the hole 20. Note that the pipe 14 may be disposed upside down with respect to the flow path direction. Similarly to the shape of the pipe 14, the shape is not limited to a cylindrical shape, and may be a square tube or a polygonal tube, and can be arbitrarily designed as long as it can be arranged inside the pipe 14. it can. Moreover, you may provide the lid | cover with an innumerable hole similarly to the top plate 19 on the bottom face of the bag. And as shown in FIG. 8 and FIG. 9, you may arrange | position the flat plate and corrugated board which consist of a magnetic body metal alternately in the inside of the collar 15 in parallel with a flow-path direction. With this configuration, the contact area between the heat generating element 15 and the water is increased, so that heat conduction to water is improved and heating efficiency is improved. The internal structure of the ridge 15 is not limited to the above shape as long as water can pass through, and can be arbitrarily designed.

  Further, the inside of the basket 15 may be filled with a magnetic metal round wire or flat wire spirally curled and wound in multiple layers. With this configuration, the contact area between the heat generating element 15 and the water is increased, so that heat conduction to water is improved and heating efficiency is improved. Moreover, since it is wound in multiple layers and intertwined, a large number of gaps are formed, and it can also serve as a filter to remove underwater dust. Note that the magnetic metal filling the inside of the cage 15 is not limited to the above shape as long as it forms a large number of gaps intertwined in multiple layers and can pass the fluid, and can be designed arbitrarily. it can.

  Further, a filter medium may be installed inside the basket 15. In addition, since it takes the structure which installs a filter medium in each bowl 15, while installing a different filter medium in each bowl 15, it can filter water in steps, and maintenance, such as exchange of a filter medium, is easy. It is.

  The filter medium put in the inside of the eaves 15 is not particularly limited, and the following can be used. For example, diatomaceous earth, cellulose fiber, zeolite, activated carbon, silica gel, glass fiber, ceramic fiber, and the like can be mentioned. Since the heating unit 7 has heat by induction heating, it is more preferable to have excellent heat resistance.

  The magnetic metal used for the member filled in the inside of the pipe 14, the cage | basket 15, and the cage | basket 15 is not specifically limited, The following can be used. For example, iron, stainless steel, and the like can be mentioned. However, when water is used as the fluid, the pipe 14 and the cage 15 are more preferably stainless steel that is not easily oxidized because it is in contact with water. Further, the pipe 14 and the flange 15 may be subjected to an anti-oxidation surface treatment.

  The cover 16 is made of an insulator, and is installed so as to cover the outer periphery of the pipe 14 as shown in FIGS. 2 to 4. The heating coil 6 is installed around the outer periphery of the cover 16 in a spiral shape. Has been. In addition, the cover 16 prevents the electric leakage from the heating coil 6, and may be a structure which also covers the lid | cover 13, and is not limited to the said shape, It can design arbitrarily.

  Moreover, the insulator used for the cover 16 is not particularly limited, and the following can be used. For example, ceramics or resin may be used. However, since the cover 16 covers the pipe 14 that is a heating element, one having excellent heat resistance is more preferable.

  Here, since it has the structure which arrange | positions the some cage | basket 15 inside the pipe 14, since each cage | basket 15 can be each replaced | exchanged, maintenance property is good. Moreover, each cage | basket 15 can be used as the thing which installed the filter medium, or the thing which expanded the contact area with water, and can also give the heating part 7 a several effect by combining each.

  Further, as shown in FIGS. 3 and 4, maintenance such as replacement of the pipe 14 and the cage 15 is performed by removing the lid 13 having the inlet 17 and taking out the cage 15 from the inside of the pipe 14. It is good also as a structure which makes the side which has a lid | cover, or it is good also as a structure which makes both the inflow port 17 side and the outflow port 18 side cover, and since the eaves 15 installed in the inside of the pipe 14 is easy to take out, maintenance property is good. Is good.

  Further, in the heating unit 7, a plurality of scissors 15 are installed inside the pipe 14, and a filtering material may be disposed inside the scissors 15, so that these become resistance to water flow, and the inside of the pipe 14 The passing water becomes turbulent. Therefore, when passing through the pipe 14, the pipe 14 or the ridge 15 that is a heating element and the water come into more contact with each other, so that heat conduction to the water is increased and heating efficiency is improved. Although the flow rate from the discharge port is reduced due to the resistance of the water flow, hot water having a required flow rate can be obtained from the discharge port 3 by supplying water into the pipe 14 by the pump 8. .

  Further, as shown in FIG. 10, a rod-shaped member 22 made of a magnetic metal is installed in the pipe 14 in parallel with the flow path direction, and the rod-shaped member 22 penetrates the plurality of flanges 15 installed in the pipe 14. And it is good also as a structure which supports each ridge 15. When the eddy current is generated in the magnetic metal by the heating coil 6, the rod-shaped member 22 plays the role of an axis, so that the eddy current is effectively generated in the rod-shaped member 22 and the efficiency of self-heating of the rod-shaped member 22 is increased. At the same time, since the contact area between water and the object to be heated is widened, the heat conduction to water is improved and the heating efficiency is improved. Further, a plurality of rod-like members 22 may be installed, and can be arbitrarily designed without being limited to the above configuration.

  The magnetic metal used for the rod-shaped member 22 is not particularly limited as in the case of the pipe 14 and the flange 15, and the following can be used. For example, iron, stainless steel, and the like can be mentioned. When water is used as the fluid, the rod-like member 22 is more preferably stainless steel that is not easily oxidized because it is in contact with water.

  In addition, as shown in FIG. 11, a plate 23 that blocks the flow path of water flowing in from the inflow port 17 may be provided in the vicinity of the inflow port 17. By providing this plate 23, the water passing through the pipe 14 becomes turbulent in the vicinity of the inflow port 17. Therefore, when passing through the pipe 14, the pipe 14 or the ridge 15 that is a heating element and the water come into more contact with each other, so that heat conduction to the water is increased and heating efficiency is improved. In addition, the plate 23 should just be a shape which prevents the flow of water, and can be designed arbitrarily.

  Moreover, as shown in FIG. 11, the outlet 18 may have a structure in which the channel gradually narrows toward the outlet and has the same cross section as the outlet channel. By using such a funnel-like structure 25, the flow resistance can be reduced. Therefore, the output of the motor 9 that drives the pump 8 can be suppressed, and the power consumption of the motor 9 can be suppressed.

  Further, as shown in FIG. 11, the filter 24 may be installed inside the pipe 14. The filter 24 can remove dust in the water. The installation position of the filter is not limited to the vicinity of the outflow port 18, and may be installed in the vicinity of the inflow port 17, or may be installed inside the basket 15, and can be arbitrarily designed.

  Moreover, although the heating part 7 was made into the pipe structure, it is good also as a tank-like structure which increased the capacity | capacitance of the water in the heating part 7 by enlarging the diameter of the pipe 14 and enlarging the diameter of the collar 15. Alternatively, a plurality of pipe structures of the heating unit 7 may be arranged in parallel, and the plurality of pipe structures may be covered with the heating coil 6. With such a configuration, the capacity of water in the heating unit 7 increases, so that the flow rate of hot water that can be supplied at a time can be increased. Moreover, the flow volume of the hot water which can be supplied at once can be increased also by making the heating part 7 into the lengthened structure.

  In addition, as shown in FIG. 12, the pipe 14 partitions the inside of the pipe 14 by a partition plate 26, and is provided with inlets 17a and 17b and outlets 18a and 18b in respective spaces partitioned by the partition plate 26. It is good also as a structure. By using such a configuration, the heated water flowing out from 18a is used for heat exchange or the like outside, and the water after use is recirculated from 17a to circulate and use the water. Can do. Accordingly, unnecessary discharge of water can be prevented and the remaining heat of the discharged water can be reused, so that power consumption can be suppressed.

  Here, the partition of the pipe 14 is not limited to the one divided up and down by the partition plate 26, and may be divided into a plurality of parts or may be divided in parallel to the flow path direction. The structure of the pipes is not limited to the above description, and may be arbitrarily designed as long as the independent flow paths each having the inlet and the outlet are formed.

  Moreover, the structure which has two or more heating coils 6 may be sufficient. By adopting such a configuration, heating can be performed for each flow path for heating water, so that heating temperature can be changed for each flow path without unnecessary heating of water. , Can reduce power consumption.

  As described above in detail, the electric heater of the present invention controls the suction port 2 for sucking the fluid supplied from the piping, the heating unit 7 for heating the fluid sucked from the suction port 2, and the heating unit 7 And a discharge port 3 through which the fluid heated by the heating unit 7 is discharged. The heating unit 7 uses electromagnetic induction heating. The heating unit 7 includes a cover 16 made of an insulating material, and a cover 16. A pipe 14 made of a magnetic metal and a plurality of flanges 15 that allow a fluid made of a magnetic metal to pass therethrough are provided inside, and the heating coil 6 is wound around the outer periphery of the cover 16 in a spiral shape to cover it. Is.

  The present invention can be applied to any apparatus that supplies a heated fluid using electricity. In addition, this electric heater is not limited to hot water supply in a residence, but may be a large-scale device such as a hot water pool or a factory.

DESCRIPTION OF SYMBOLS 1 Electric heater main body 2 Intake port 3 Outlet port 4 High frequency electric current generation circuit 5 Control part 6 Heating coil 7 Heating part 8 Pump 9 Motor 10 AC power supply 11 Valve 12 Valve 13 Lid 14 Pipe 15 15 16 Cover 17 Inlet 18 flow Outlet 19 Top plate 20 Amber 21 Buffer member 22 Bar member 23 Plate 24 Filter 25 Funnel-shaped structure 26 Partition plate

Claims (5)

A suction port for sucking fluid supplied from the pipe, a heating unit for heating the fluid sucked from the suction port, a control unit for controlling the heating unit, and a discharge port for discharging the fluid heated by the heating unit; In an electric heater using electromagnetic induction heating for the heating unit,
The heating unit includes a cover made of an insulating material;
A pipe made of a magnetic metal inside the cover;
A plurality of spears that allow a fluid made of a magnetic metal to pass through the pipe;
An electric heater, wherein a heating coil is wound around and covered around the outer periphery of the cover.   The electric heater according to claim 1, wherein water is used as the fluid.   The said cage | basket forms a several hole in a top plate, or arrange | positions the flat plate and corrugated plate which consist of a magnetic body metal inside in parallel with a flow-path direction, It is characterized by the above-mentioned. Electric heater.   The electric heater according to any one of claims 1 to 3, wherein a filter medium is disposed inside the basket.   The rod-like member made of a magnetic metal is installed in the pipe in parallel with the flow path direction, and the rod-like member penetrates the plurality of ridges to support each ridge. The electric heater in any one of 1-4.

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