JP2939204B2 - Heat storage electric heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative electric heater, and more particularly, to an electric heater for storing electric power which is supplied to a sheathed heater at night and stores the heat in an iron oxide-based regenerative brick having a large heat capacity. A heat storage electric heater that effectively saves the heat storage with thermal insulation covered with a thermal storage brick, radiates the stored heat into the room by natural convection by opening and closing the damper as needed, and uses it for indoor heating without a fan It is.

[0002]

2. Description of the Related Art In a conventional heat storage electric heater, a general brick is brought into contact with a sheath heater to store heat.

[0003]

However, conventional bricks have a problem that the heat capacity of nighttime electric power cannot be sufficiently and efficiently used because of a small heat capacity.

The present invention uses an iron oxide heat storage brick having a large heat capacity, coats the iron oxide heat storage brick with a heat insulating material to effectively store heat, and controls natural convection by opening and closing a damper as required. By dissipating heat indoors,
An object of the present invention is to provide a heat storage electric heater aimed at solving the above-mentioned conventional problems.

[0005]

SUMMARY OF THE INVENTION The present invention provides a base and a floor.
The square cover and the left and right side covers
The casing is formed by being joined and fixed in a
On the top and bottom of the case cover, a blowout grill and a suction respectively
Grille is formed on the inside and left and right sides of the casing.
The inner side partition plates are erected and
Multiple slits face each other between the partition plates
The internal top plate and internal bottom plate
And the lower surface of the inner top plate and the upper surface of the inner bottom plate
Has a silicide with slits communicating with the slits
Upper and lower insulation made of calcium block
The materials are fixed respectively, and the inner top plate and
On the inner surface of each inner side partition plate of the inner bottom plate,
External fiber insulation and ceramic fiber
And the inner side heat insulating material is fixed, and
Above the inner top plate, a damper covered with heat insulating material,
Rotatable to open and close the slit on the internal top plate
While the upper heat insulator, the lower heat insulator,
In the space surrounded by heat insulating material on the side of the
While a plurality of girder iron oxide thermal storage bricks are stored,
The front of the iron oxide thermal storage brick is made of microtherm
Due to the inner front main insulation, each slit is vertical
Is coated with a gap so that it can penetrate into
The back of the iron-based heat storage brick has an internal back made of microtherm
Is covered with a gap by a main heat insulating material, and
The outer surface of the main front insulation and the inner back
Exterior front and back insulation made of wool
Are respectively disposed, and the iron oxide-based heat storage brick and
Seed heaters in the gap between the main heat insulators at the rear
It is installed in contact with the heat storage brick,
A heat storage completion controller and an overheat prevention device are connected in series at the top.
By employing the means of connecting Ru is disposed, the above-mentioned problems are eliminated.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a heat storage electric heater of the present invention, FIG. 2 is a front view with a front cover removed, and FIG. 3 is a plan view of the same, in which 1 is a casing made of a steel plate, and the casing 1 is a base 1 having an L-shaped cross section.
a and a front cover 1b having an inverted L-shaped cross section and left and right side covers 1c and 1d, respectively. Inside side walls 2a and 2b made of a steel plate are erected on the left and right inside the casing 1, and a plurality of slits 4a and 4b made of a steel plate are provided between the inside side partition plates 2a and 2b. Are fixed in parallel with each other.

In the figure, reference numeral 3 denotes a heat insulating material, and slits 4 formed in the inner upper surface plate 2c and the inner lower surface plate 2d are formed on the lower surface of the inner upper surface plate 2c and the upper surface of the inner lower surface plate 2d.
An upper heat insulating material 3a and a lower heat insulating material 3b made of calcium silicide blocks having slits 4c and 4d respectively communicating with the a.4b are fixed, and the inner side surface partitions of the inner upper surface plate 2c and the inner bottom surface plate 2d. Board 2
External side heat insulators 3c and 3d made of glass wool and internal side heat insulators 3e and 3f made of ceramic fiber are fixed to the inner surfaces of a and 2b, respectively.

A damper 5 covered with a heat insulating material made of silicon foam is provided above the inner upper surface plate 2c, and a shaft 5a of the damper 5 is positioned near upper portions of the inner side partition plates 2a and 2b. The upper end of the slit 4a is opened and closed by opening and closing the slit 4a by rotating the damper 5 as needed by pivotally supporting the damper shaft 5a and connecting one end of the damper shaft 5a to start / stop heat radiation. And the amount of heat radiation can be controlled by changing the opening angle. Further, a heat storage completion controller 7 made of bimetal is provided above the internal upper surface plate 2c, and when the heat storage temperature set by the heat storage completion controller 7 is reached, the heat storage circuit is cut off.

Further, an overheating prevention device 8 made of bimetal is provided on the upper portion of the internal upper surface plate 2c. The heat storage circuit is cut off by the prevention device 8 to prevent damage due to overheating of the device. A sheath heater 9 for heating is provided between the inner side partition plates 2a and 2b in the casing 1 between the inner side partition plates 2a and 2b.
It is provided to be supported by.

On the outside of the inner side partition plate 2b, a damper motor 6 for driving the damper 5, a transformer 11 for converting a commercial power supply to a low voltage as a power supply for the damper motor 6, and a drive for the damper motor 6 are provided. A damper relay 12 to be controlled and a power supply terminal block 13 for wiring and connecting the power supply and the electric equipment are mounted.

A plurality of iron oxide-based heat storage bricks 14 are housed in a space surrounded by the upper heat insulating material 3a, the lower heat insulating material 3b, and the inner side heat insulating materials 3e and 3f in the casing 1, and the oxidizing agent is provided. The front surface of the iron-based heat storage brick 14 is provided with a gap 15 so that the slits 4a to 4d can be vertically penetrated by the internal front main heat insulating material 3g made of microtherm.
a, and the back surface of the iron oxide thermal storage brick 14 is covered with an inner back main heat insulating material 3h made of microtherm with a gap 15b of the width of the sheathed heater 9, and further covered with the inner front surface. An outer front heat insulator 3i and an outer rear heat insulator 3j made of glass wool are provided on the outer surfaces of the main heat insulator 3g and the inner rear main heat insulator 3h, respectively.

Since the iron oxide heat storage brick 14 has a larger heat capacity than conventional bricks, it has a large heat storage effect. Then, the iron oxide-based heat storage brick 14
Has formed a number of serrated irregularities 14a on its front surface,
In addition, the rear surface is arranged so that a middle position thereof is in contact with the sheathed heater 9. The irregularities 14a are for increasing the surface area of the front surface of the iron oxide-based heat storage brick 14 to increase the efficiency of heat exchange when warming the air near the irregularities 14a.

On the front surface of the damper 5 of the front cover 1b having an inverted L-shaped cross section, a hot air blowing grill 1e is provided.
However, a suction grill 1f is provided near the lower part of the front surface, and the side covers 1c and 1d cover the casing 1 by covering the damper motor 6, the transformer 11, the damper relay 12, the power supply terminal block 13 and the like from the outside. Form.

FIG. 4 is a longitudinal sectional view of the regenerative electric heater of the present invention, showing the internal structure from the right side. The casing 1 includes a base 1a having an L-shaped cross section and a front cover 1b having an inverted L-shaped cross section.
An outlet grille 1e is formed at the upper part of the front surface of b, and a suction grille 1f is formed at the lower part. Both ends of the inner bottom plate 2d are attached to the base 1a and the front cover 1b, and the center is supported by the bottom support 2e.

The iron oxide thermal storage brick 14 is covered on the upper and lower sides with an upper heat insulating material 3a and a lower heat insulating material 3b, and has gaps 15a and 15b before and after the inner front main insulating material 3g.
And an inner rear main heat insulator 3h, and an outer front heat insulator 3i and an outer rear heat insulator 3j are disposed on outer surfaces of the inner front main heat insulator 3g and the inner rear main heat insulator 3h. The reason why the gap 15a is provided in the vicinity of the uneven portion 14a and the inner front main heat insulating material 3g is to efficiently convect the heat of the iron oxide-based heat storage brick 14 upward. The reason why the gap 15b is provided between the rear surface of the inner back main insulating material 3h and the inner rear main heat insulating material 3h is not only that the heat of the sheath heater 9 is directly transmitted to the iron oxide-based heat storage brick 14 as conduction heat, but also that the gap 15b is provided. The iron oxide-based heat storage brick 14 is heated using radiant heat, and the gap 1 is further heated.
This is because the iron oxide-based heat storage brick 14 is efficiently heated from the entire back surface using the hot air of 5b.

FIG. 5 is a circuit diagram showing a heat storage circuit section. The sheath heater 9, an overheat prevention device 8 made of bimetal, and a heat storage completion controller 7 made of bimetal constitute a series circuit. Since it is connected to the power supply, the series circuit is disconnected even when the heat storage is completed or when the temperature is too high, so that the sheathed heater 9 is not heated in any case.

FIG. 6 is a circuit diagram showing a heat radiating circuit section. A transformer 11 converts a commercial power supply to a low voltage to operate the damper motor 6, and the damper motor 6 and the damper relay 12 are connected in series. By controlling the damper relay 12 with a thermostat 16, the rotation direction of the damper motor 6 is switched, and the opening / closing operation of the damper 5 is controlled.

Thus, the iron oxide heat storage brick 14
When the temperature rises to a preset heat storage temperature and heat storage is completed, the heat storage completion controller 7 made of bimetal disconnects the heating circuit, so that the sheath heater 9 is not heated any more. In the event that the iron oxide heat storage brick 14 is heated to a temperature higher than a preset temperature for some reason, the temperature rise prevention device 8 made of bimetal is activated to activate the heating circuit. Is cut off and the sheath heater 9 is no longer heated, so that safety can be ensured.

Outside the inner front main heat insulating material 3g and the inner rear main heat insulating material 3h before and after the iron oxide-based heat storage brick 14, an outer front heat insulating material 3i and an outer rear heat insulating material 3j are further provided.
Are provided in the casing 1 to more strictly prevent heat storage from unnecessarily flowing out of the casing 1 around the outside. A damper 5 is provided on the slit 4a of the inner upper surface plate 2c in the casing 1, and the damper 5 includes a damper shaft 5a and inner side partition plates 2a and 2a.
b is rotatably supported, connected to the damper motor 6, and driven to open and close the upper part of the slit 4a.

The slit 4 is formed by a damper 5.
is closed, and the sheath heater 9 is heated by an external current supply, the heat is stored in the iron oxide-based heat storage brick 14, and the stored heat is transferred to the heat insulating material 3 by the entire iron oxide-based heat storage brick 14. And since the damper 5 closes the slit 4a, the heat is kept without being dissipated. The heat is stored in the surroundings, particularly the uneven portions 14 having a large surface area.
The air in the gap near a is efficiently heated. The warmed air has a lower specific gravity, and the iron oxide-based heat storage brick 1
The gap 15a between the vicinity of the uneven portion 14a of FIG. The rising air is the upper insulation material 3a.
Slits 4a and 4c for communicating between the upper surface plate 2c and the inner upper plate 2c
Try to go up through. However, since the slit 4c is closed by the damper 5 covered with a heat insulating material made of silicon foam, the casing 1
The heat is not radiated to the outside, and the heat is further stored in the iron oxide-based heat storage brick 14.

At the time of heating the room, when the damper 5 which has been closing the slit 4a is opened by driving the damper motor 6, the light and warm air passing through the slits 4c and 4a is removed by the casing. The air is blown out from the blowout grille 1e at the upper part of the front surface 1 and discharged indoors. The blowing amount is controlled by the degree of opening of the damper 5. On the other hand, when the air near the uneven portion 14a of the iron oxide-based thermal storage brick 14 is efficiently heated by the uneven portion 14a and rises and is discharged indoors, the gap 15a near the uneven portion 14a becomes negative pressure, negative pressure draws in air from the suction grille 1 f of the lower front, to replenish the air in the negative pressure in the vicinity of the concave-convex portion 14a. When the replenished air is heated by the iron oxide regenerative brick 14 to cause convection of the air, warm air can be continuously sent into the room without using a fan. Since the heat storage electric heater of the present invention employs the iron oxide heat storage brick 14, the heat capacity is large, and the duration of heating by convection can be extended.

When the regenerative electric heater of the present invention is installed near a window of a building and constantly emits upward warm air, a stable air curtain effect prevents cold drafts (cold air) from the outside and heats the room. And the temperature distribution in the room can be made uniform. In addition, since heat can be stored using inexpensive nighttime power, the overall running cost can be reduced. Further, the present invention provides an iron oxide heat storage brick 14 having a large heat capacity by energizing and heating the sheath heater 9 on the basis of inexpensive nighttime power.
The iron oxide-based thermal storage brick 1 is mainly configured by electrically storing and storing heat and electrically opening and closing the damper according to the presence or absence of a heating request.
The control unit controls the heat radiation of natural heat convection of the heat storage of No. 4, and can perform additional cooking during the day if necessary.

[0023]

The regenerative electric heater according to the present invention is embodied in the form described above, and has the following effects. Since iron oxide heat storage bricks were used for heat storage,
It has a large heat capacity and can stably release its heat for a long time. Since the iron oxide heat storage brick has an uneven portion on the front surface, the surface area is large, heat exchange for producing warm air for heating is efficiently performed , and a gap is provided on the front side of the brick.
Is provided to efficiently convect the heat of the brick
And a gap is also provided on the back side of the brick.
The heat of the sheathed heater directly to the brick
Uses radiant heat not only as heat but also through the gap
To heat the bricks, and then use the hot air in the gaps to
Ru can be efficiently heat the entire back surface. Thermal storage completion controller made of bimetal and overheat prevention device are connected in series.
When the heat storage is completed because the circuit is configured and connected to the power supply
Even when the temperature is too high, the series circuit is disconnected.
In any case, the sheathed heater is not heated,
Safety can be ensured. Further, by installing the regenerative electric heater of the present invention in a perimeter zone (air conditioning) near a window of a building, it is possible to prevent a cold draft (cold air) and reduce a load of indoor heating by a stable air curtain effect. In addition, the temperature distribution in the room can be made uniform. Further, since inexpensive nighttime power is used, there is an effect that the overall running cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a heat storage electric heater according to the present invention.

FIG. 2 is a front view of the heat storage electric heater of the present invention with a front cover removed.

FIG. 3 is a plan view of the heat storage electric heater of the present invention with a front cover removed.

FIG. 4 is a longitudinal sectional view of the heat storage electric heater according to the present invention.

FIG. 5 is an explanatory diagram of a heat storage circuit of the heat storage electric heater according to the present invention.

FIG. 6 is an explanatory diagram of a heat dissipation circuit of the heat storage electric heater according to the present invention.

[Explanation of symbols]

1 casing, 1a base, 1b front cover
ー, 1c ・ 1d side cover, 1e
, 1f suction grill, 2a ・ 2b inside side
Partition plate, 2c internal top plate, 2d internal bottom plate, 3
Insulation , 3a upper insulation, 3b lower insulation,
3c ・ 3d Insulation material on outer side, 3e ・ 3f Inner side
Insulation material, 3g inside front main insulation material, 3h inside back
Main heat insulator, 3i External front heat insulator, 3j Internal rear heat insulator, 4a-4d slit, 5 damper, 7 Heat storage completion controller, 8 Overheat prevention device, 9 Seeds heater, 14 Iron oxide heat storage brick, 14a Unevenness Department,
15a, 15b gap.

Claims (1)

(57) [Claims] 1. A base, a front cover, and right and left sides.
Cover by joining them in a rectangular box shape.
Is formed on the upper and lower parts of the front cover.
A blow grill and a suction grill are formed respectively, and
On the left and right inside the casing, there are inner side partition plates, respectively.
The inner side partition plate is provided with a plurality of
Internal top plate with internal slits facing each other
The bottom plate is fixed in parallel, and the lower surface of the inner top plate
And the upper surface of the inner bottom plate communicates with each slit
Composed of calcium silicide blocks with slits
When both the thermal insulation and the lower insulation are fixed,
In addition, each internal side partition of the internal top plate and the internal bottom plate
Outside side insulation made of glass wool on the inside surface of the board
And the inner side insulation made of ceramic fiber
A heat insulating material fixed above the inner top plate, respectively.
Damper covered with a slit in the internal top plate
The upper part is pivotally supported so that it can be opened and closed.
Space surrounded by thermal insulation, lower insulation, and inner side insulation
The part has a plurality of iron oxide based heat storage
And the front of the iron oxide thermal storage brick.
The main front insulation made of microtherm,
There is a gap so that each slit can penetrate vertically
And the back of the iron oxide-based heat storage brick is
Clearance is provided by the inner main back insulation made of crosstherm.
The inner front main insulation and the inner back
External front section made of glass wool on the outer side of the main insulation
Heating material and external rear insulation are provided respectively, and
The gap between the iron oxide-based heat storage brick and
Heater is installed in contact with the iron oxide-based heat storage brick.
A heat storage completion controller and a heat storage completion controller are provided above the internal top plate.
A heat storage electric heater characterized in that a heat storage device and an overheat prevention device are connected in series .