JPH09296960A - Electrical heat storage heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat storage efficiency and heat dissipation efficiency of a natrural heat dissipation type electrical heat storage heater having an air vent passage therein. SOLUTION: A groove 10 is provided in a mating face of paired two heat storage units 1, in which an electrical heater 2 is assembled. The groove 10 is exclusive for accommodation of the heater. An air vent passage 3 is provided on the side surface of the treat storage unit with a protruded stripe 13 provided as a spacer between it and a heat insulating member 4 for ensurance of an enough size. The protruded stripe 13 may be formed as separate parts, and a heat dissipation area is widened with the protruded stripe. Thus, efficiencies of heat storage and heat dissipation are improverd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heat storage heater that uses midnight power to store heat in a heat storage body at night and releases the stored heat during the daytime for heating.

[0002]

2. Description of the Related Art There are two types of electric heat storage heaters, one that warms the air that has flowed into it to let out hot air, and the other that discharges all the heat required for heating as radiant heat.

The former method is provided with an air passage for exchanging heat with a heat storage body, and the amount of hot air blown out by heat exchange (that is, the amount of heat radiation) is determined by the opening degree of the air passage. Can be adjusted and controlled with a thermally or manually operated lid. Also,
Hot air blowing is also widely used because it can be performed using natural convection.

In most of the former type heaters, as shown in FIG. 6, an electric heater 2 is sandwiched between the mating surfaces of the rectangular parallelepiped heat storage bodies 1 and 1, and a heater generated between the mating surfaces. The gap corresponding to the diameter is used as the air passage 3.

[0005]

Since the electric heat storage heater having the structure shown in FIG. 6 uses the electric heater as a spacer, the depth dimension d of the ventilation passage is insufficient and the heater becomes an obstacle. Since the air flow is obstructed at the mounting part, a sufficient amount of ventilation due to natural convection cannot be obtained, and high heat dissipation cannot be expected. Further, since the heater heat is taken by the air in the ventilation passage, the heater heat is not efficiently transferred to the heat storage body, resulting in a large energy loss.

An object of the present invention is to eliminate the above-mentioned problems in order to improve the performance of an electric heat storage heater having a ventilation passage.

[0007]

According to the present invention, in order to solve the above problems, a regenerator, an electric heater for heating the regenerator, a heat insulating material surrounding the regenerator, a mechanism for controlling the amount of heat stored in the regenerator, and a suction port. Adjust the amount of hot air blown by changing the outlet opening with the ventilation passage that changes the air that flows in from the outlet to the warm air by exchanging heat with the heat storage body and outflow from the outlet, and the lid provided at the outlet of this ventilation passage. In an electric heat storage heater having a heat dissipation amount control mechanism, a groove adapted to the shape of the heater is provided inside the heat storage body, and the electric heater is housed in the groove inside the heat storage body. A convex portion for expanding the radiating surface which also serves as a spacer between is provided, and the ventilation passage is provided between the heat insulating material side surface where the convex portion is present and the heat insulating material.

It is desirable that the convex portion is formed by mounting a separate component having good heat conductivity on the heat storage body.

As the installation form of the convex portion, the following ones can be considered. (1) The protrusion is a vertically long ridge, and the ridge divides the ventilation passage into a plurality of parts in the width direction. (2) The convex portions are independent protrusions, and a plurality of independent protrusions arranged in a column are provided in parallel. (3) The convex portions are independent protrusions, and the independent protrusions are vertically and laterally displaced from each other. (4) A plate in which vertically long convex portions and concave portions are alternately formed in the width direction is used as a separate component, and a space inside the convex portion of this plate and a concave portion serve as an air passage. (5) As a separate part, a combination of fins in a grid pattern is used, and the fins are provided with holes serving as air passages at appropriate places. (6) A pipe assembly is used as a separate component, the entire pipe assembly is the convex portion, and the internal cavity of the pipe is the ventilation passage.

[0010]

Since the electric heater is housed in the dedicated storage groove and provided at a location different from the ventilation passage, the heat of the heater is not taken away by the air in the ventilation passage, and the heat storage body is efficiently heated.

Further, since the ventilation passage is provided on the side surface of the heat storage body, there is no restriction due to the heater diameter, and the ventilation passage size can be sufficiently secured. In addition to this, the heat radiation area is expanded by the convex portion on the side surface of the heat storage body, so that the heat radiation performance is also improved.

Next, in the device adopting the form of the above (1) (claim 2), since another component functions as a heat radiation fin, the heat radiation characteristic is further improved.

Further, in the form (2) (claim 3),
Due to the guiding action of the convex portion, the flow of the warm air becomes directional, and the movement and the heat dissipation of the warm air are accelerated. The same action and effect can be obtained with the form (3) (Claim 4), but this also causes a slight turbulence.

In the case of the form (4) (claim 5), turbulent flow and meandering of the hot air are generated by the alternately arranged projections, the heat exchange time is increased, and high temperature hot air can be obtained.

Further, in the case of the forms (5), (6) and (7) (claims 6, 7 and 8), the area of the heat dissipation surface is greatly increased,
Heat exchange becomes faster. In addition, the same effect as in the form (2) also accelerates heat dissipation. In the case of the form (6), it is possible to cause turbulence and meandering depending on the positions of the holes provided in the fins.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a specific example of a convex portion provided on the side surface of a heat storage body.

In FIG. 1A, a plurality of columnar projections 11 are integrally arranged in a row on the side surface of the heat storage body 1 in a width W direction of the heat storage body at a constant pitch. The projections 11 function as spacers between the heat insulating material and a ventilation path between the heat insulating material and the heat insulating material as described later. The protrusion amount d of the protrusion 11 is
It is desirable to set the depth D of the heat storage body 1 to 1/4 or less.
In addition, the width (diameter in the figure) of the protrusion 11 is 1/2 W of the substantial width of the ventilation passage (the width of the portion excluding the blocking portion due to the protrusion).
It is recommended that the size be left over.

In FIG. 1B, the protrusions 11 are arranged so as to be displaced vertically and horizontally, alternately. With the arrangement shown in FIG. 1 (a), the flow direction of the warm air becomes substantially constant, and the heat is released quickly. On the other hand, in the arrangement of FIG. 1 (b), turbulent ascending flow and meandering are likely to occur, and the heat exchange time becomes longer accordingly, so high-temperature warm air can be obtained. These two are properly used depending on which of the speed of heat radiation and the temperature of warm air is important.

FIG. 1 (c) is obtained by replacing the columnar protrusion of FIG. 1 (a) with a protrusion 12 of a square piece, and FIG. 1 (d) is shown in FIG.
The protrusion of (b) is also replaced with the protrusion 12 of the square piece, and the operation and effect which are not so different from those described above can be obtained.

FIG. 1 (e) shows a vertically elongated ridge 13 as a convex portion.
The ventilation passages are divided into a plurality of parts in the width direction by the ridges 13, and the flow of warm air becomes smooth.

Further, FIG. 1 (f) shows a side surface 4 of the heat storage body 1.
The fan-shaped projections 14 are provided at the corners, and the cylindrical projection 11 is provided at the center of the side surface. FIG. 1 (g) shows the projection 4 provided only at the center of the side surface. Suitable for widening.

FIG. 2 shows a specific example of a separate part for forming a ventilation path inserted between the heat storage body and the heat insulating material.

The other part of FIG. 2A is a square plate 15
A vertically long fin 16 which is a convex portion is attached to one surface of the plate, and the fin 16 functions similarly to the protrusion 13 of FIG. 1 (e). In addition, another component of FIG. 2B is a rectangular plate that is bent to alternately form a vertically long rectangular convex portion 17 and a rectangular concave portion 18, and a space inside the convex portion 17 and a concave portion 1 are formed.
8 is a ventilation path divided from each other.

Another component of FIG. 2C is a vertically long fin 19
And the horizontally long fins 20 are combined in a grid pattern, and the connecting parts 21 are connected to each other in some places, and the grid-like compartments are communicated with the holes 22 provided in each fin, and the hot air moves through the holes 22. . According to the opening position of the hole 22, the warm air can be raised straight or meandered.

2 (d) and 2 (e) are shown in FIG. 2 (b).
It can be said that this is a modified example of the part of FIG.
2B is different from that shown in FIG. 2B in that the triangular peaks are formed, and the latter is formed by corrugating both the convex portions 17 and the concave portions 18.

The component shown in FIG. 2 (f) is a plate 15 provided with a plurality of projections 23 by stamping or joining. The protrusions 23 have the same function as the protrusions of FIGS. 1A and 1B depending on the arrangement. Further, FIG. 2 (g) shows a pipe or a bar 24.
This is sandwiched between the heat storage body and the heat insulating material to form an air passage between the sandwiching surfaces.

FIG. 2 (h) shows a pipe assembly 25,
The space in the pipe divided into a plurality serves as a ventilation path. This pipe assembly 25 may be an assembly of round pipes, but if it is the square pipe assembly in the figure, the contact area with the heat storage body and the heat radiation area are larger, and the heat radiation characteristics are better.

The separate component shown in FIG. 2 is formed of a material having good thermal conductivity. The material is preferably a metal such as stainless steel which has excellent heat resistance. As a result, the separate component functions as a heat radiation fin, and the amount of heat radiation per unit time is increased as compared with that of FIG.

The parts shown in FIGS. 2 (a) to 2 (e) may be adhered to the heat storage body 1 on the surface opposite to the drawing.

Next, specific examples of the heater accommodating groove provided inside the heat storage body are shown in FIGS. 3 (a), 3 (b) and 3 (c).

In the present invention, the two back to back are provided with the groove 10 in the mating surfaces of the pair of heat storage bodies 1, and the electric heater is housed in the groove 10. The electric heater is, for example, a straight rod shape,
There are inverted U-shape and M-shape. As shown in the figure, the groove 10 has a shape adapted to the shape of the heater, and the groove is dimensioned so that at least a gap for thermal expansion and contraction of the heater is generated between the groove and the heater in consideration of the thermal expansion amount of the electric heater. deep. Groove 10
It is preferable to set the intervals so that the heater heating portions are evenly distributed in each area of the mating surfaces in order to uniformly heat each portion of the heat storage body.

If the groove 10 is formed to have a gap slightly larger than the gap required for allowing the heater to expand and contract, the electric heat storage heater can be easily assembled. Further, as the groove shape, a groove that is not open to the upper surface of the heat storage body (for example, a groove as shown in FIGS. 3B and 3C) is preferable because the heater heat is less likely to escape.

The convex portion as shown in FIGS. 1 and 2 is provided on the side surface of the heat storage body opposite to the mating surface on which the groove 10 is provided. Of course, if necessary, a convex portion may be provided on the side surface in the depth direction to create an air passage.

FIG. 4 shows an overall view of an embodiment of the electric heat storage heater of the present invention. In the figure, 1 is a heat storage body, 2 is an electric heater, 3 is a ventilation passage, 4 is a heat insulating material surrounding the heat storage body, 5 is a heat insulating base plate, 6 is an outer case, and 7 is a lid provided at the outlet of the ventilation passage. , 8 are bimetals that are deformed by sensing the temperature of warm air, and the deformation of the bimetal 8 causes the lid 7 to move so that the opening degree of the air outlet is small when the temperature rises and becomes large when the temperature falls.

The electric heater 2 is controlled by a heat storage amount control mechanism (not shown) having a heat storage temperature setting controller, a heat storage temperature excess temperature preventer, etc. until the heat storage body temperature reaches the temperature set by the controller. It is energized.

Although the heat radiation amount control mechanism uses the bimetal 8, the heat radiation amount control mechanism is one in which the lid is opened and closed manually, one in which the opening of the air outlet is finely adjusted according to room temperature, or the lid is forcibly stored during heat storage. It may be one that can be closed. As the heat storage amount control mechanism, one that automatically adjusts the heat storage amount according to the room temperature can be used.

The ventilation passages 3 are formed with longitudinally elongated protrusions 13 on the side surface of the heat storage body 1 at a constant pitch in the width direction, and the protrusions serve as spacers to make use of the gaps formed between the heat insulating material 4. There is.

Further, the electric heater 2 is provided with a groove 10 conforming to the shape of the heater on the mating surface of the heat storage bodies 1 and 1 and incorporated therein, and is inside the combined heat storage body.

The electric heat storage heater of FIG. 4 is of a natural heat dissipation type by air convection, and the air flowing in from the suction port of the ventilation passage is heated by exchanging heat while passing through the ventilation passage 3 to become warm air. Flow out from the outlet of the ventilation passage. The hot air flows into the room from the grill 9 of the outer case 6 to heat the room.

Although the protrusion of FIG. 1 (e) is used as the convex portion provided on the side surface of the heat storage body 1 here,
You may use the other convex part in the above. The other component shown in FIG. 2 has a high effect of improving the heat dissipation characteristic and is particularly preferable.

(Examples) The results of confirmation tests of the effects of the present invention will be described below.

Heat storage body 1 (heat storage brick) having the shape shown in FIG.
made. The size of this heat storage body 1 is as follows:
Width W = 260mm, depth D = 40mm, spacing between ridges w = 8
0 mm, thickness t of each ridge 13 = 5 mm, protrusion amount d of the ridge 13
= 5 mm, the radius r of the groove 10 is 5 mm.

Two heat storage bodies 1 of FIG. 5 were assembled back to back, and electric heaters of 100 W and 7 mm in diameter were respectively installed in the two holes of 10 mm in diameter created on the mating surfaces. Then, the heat storage heater (invention product) was completed by surrounding the heat storage body with a heat insulating material having a thickness of 35 mm, and the grooves between the projections 13 serve as ventilation passages.

In the test, using the invention product, two electric heaters were energized in a state where the air outlet of the ventilation passage was closed, the heat was stored for 8 hours, the lid was fully opened, and heat was released for 16 hours (at this time, the heater was turned off). ) Was done.

Further, for comparison, 10 pieces are placed between two rectangular parallelepiped heat storage bodies (height 150 mm, width 260 mm, depth 40 mm).
Two electric heaters with 0 W and a diameter of 7 mm are sandwiched, and the surrounding is surrounded by a heat insulating material so that there is no gap between the heat storage body and
Gap between heater clamping surfaces (width is 7 mm, the same as heater diameter)
The same test was performed for the one using the ventilation passage (conventional product). Table 1 shows the heat storage efficiency, heat dissipation efficiency, and total efficiency of the invention product and the conventional product in the test. Each efficiency is based on the following equation.

Heat storage efficiency = heat storage amount of heat storage body / heater heat generation amount Heat radiation efficiency = heat radiation amount of heat storage body / heat storage amount of heat storage body Total efficiency = heat storage efficiency × heat radiation efficiency

[0047]

[Table 1]

From the test results of Table 1, it can be seen that both the heat storage efficiency and the heat dissipation efficiency are improved by the structure of the present invention.

[0049]

As described above, in the electric heat storage heater of the present invention, the groove for exclusive use of the heater is provided inside the heat storage body and the electric heater is incorporated therein. Consumption is reduced.

Also, since the convex portion for radiating surface expansion, which also serves as a spacer, is provided on the side surface of the heat storage body to create an air passage between the heat insulating material and the heat insulating material, it is possible to sufficiently increase the size of the air passage and improve the heat radiation efficiency. Better and better heating capacity.

In addition, since the convex portions can adopt various shapes, there is a degree of freedom in designing and provision of ones according to the required characteristics (for example, one having a fast heat radiation rate and one having a high warm air temperature) are provided. it can.

In the case where the ventilation passage is created by using another component having good heat conductivity, the other component works as a radiation fin,
The effect of improving heat dissipation characteristics is particularly remarkable.

[Brief description of drawings]

1A to 1G are perspective views showing a specific example of forming a convex portion on a heat storage body.

2A to 2H are perspective views showing a specific example of forming a convex portion by another component.

3A to 3C are perspective views showing a specific example of a heater housing groove provided in a heat storage body.

FIG. 4 (a) is a sectional view of the electric heat storage heater of the embodiment.

FIG. 5 is a perspective view for explaining the shape and dimensions of the heat storage body of the invention used in the experiment.

FIG. 6 is a view showing a ventilation path of a conventional heat storage heater.

[Explanation of Codes] 1 heat storage body 2 electric heater 3 ventilation path 4 heat insulating material 5 heat insulating base plate 6 outer case 7 lid 8 bimetal 9 grill part 10 groove for housing heater 11, 12, 14, 23 projection 13 ridge 15 Plates 16, 19, 20 Fins 17 Projections 18 Recesses 21 Connecting pieces 22 Holes 24 Pipes or rods 25 Pipe aggregates

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fujio Sonoda 776 Naie, Naie-cho, Sorachi-gun, Hokkaido Inside Hokkaido Electric Co., Ltd.

Claims (8)

[Claims] 1. A heat storage body, an electric heater for heating the heat storage body, a heat insulating material surrounding the heat storage body, a mechanism for controlling the amount of heat stored in the heat storage body, and the air flowing from the inlet is converted into warm air by heat exchange with the heat storage body. In the electric regenerator with a heat dissipation amount control mechanism that adjusts the amount of hot air blown by changing the opening of the air outlet with the air passage that flows out from the air outlet and the lid provided at the air outlet of the air passage. A groove adapted to the shape of the heater is provided inside, and the electric heater is housed in this groove. Further, a convex portion for expanding the heat radiation surface is provided on the side surface of the heat storage body, the convex portion also serving as a spacer between the heat storage material and the heat insulating material. An electric heat storage heater characterized in that the ventilation passage is provided between a heat storage material side surface having a convex portion and a heat insulating material. 2. The electric heat storage heater according to claim 1, wherein the convex portion is formed by mounting a separate component having good heat transfer property on the heat storage body and by the separate component. 3. The electric heat storage heater according to claim 1, wherein the convex portion is a vertically long ridge, and the ridge divides the ventilation passage into a plurality of parts in the width direction. 4. The electric heat storage heater according to claim 1, wherein the convex portions are independent protrusions, and the independent protrusions are arranged in a plurality of columns in parallel. 5. The convex portions are independent protrusions, and the independent protrusions are arranged vertically and laterally in a staggered manner.
Alternatively, the electric heat storage heater described in 2. 6. A plate in which vertically long convex portions and concave portions are alternately formed in the width direction is used as the separate component, and a space inside the convex portion of the plate and a concave portion serve as an air passage. Item 2. The electric heat storage heater according to Item 2. 7. The electric heat storage heater according to claim 2, wherein a fin-shaped combination of fins is used as the separate component, and holes provided as air passages are provided at appropriate positions of the fins. 8. The electricity according to claim 2, wherein an assembly of pipes is used as the separate component, the entire assembly of the pipes serves as the convex portion, and an internal cavity of the pipe serves as the ventilation passage. Heat storage heater.