JPH1144459A - Electric hot air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise heat exchange efficiency of a heat storage device. SOLUTION: This electric hot air heater comprises an outlet 23 provided in a hot air heater main body 21 having a box-like structure, a first air supply path 24 provided within the heater main body 21 and communicating with the outlet 23, an air supply fan 26 for supplying air into the first air supply path 24 toward the outlet 23, a hot air heater 28 provided in a midway of the first air supply path 24, a heat storage container 29 communicating with a halfway part of the first air supply path 24, a heat storage device 31 provided within the heat storage container 29, a second air supply path 30 having an inverted-U shape and having an outflow opening 36 and an inflow opening 35 communicating with a halfway part of the first hot air supply path 24 formed by installation of the heat storage device 31 in the heat storage container 29 and a damper mechanism 27 for opening and closing the inflow opening 35 and the outflow opening 36. The heat storage device 31 comprises a heat storage brick 33 and a heat storage heater 34 built in the heat storage brick 33, and a partition plate 41 is provided between both end parts of the heat storage bricks 33 and an inner face of the heat storage container 29 opposite to the end parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hot air blower for blowing hot air from an outlet using, for example, a hot air heater and a heat storage device, and more particularly to a device for improving the heat exchange efficiency of the heat storage device.

[0002]

2. Description of the Related Art FIG. 7 is a simplified longitudinal sectional view showing the structure of a conventional electric hot air blower disclosed in, for example, Japanese Utility Model Publication No. 52-28349, and FIG. 8 is a sectional view of a main part taken along line VIII-III of FIG. ,
FIG. 9 is a perspective view of the heat storage unit. In the figure, 1 is a main body case, 2 is a heat storage part installed in a central part in the main body case 1, a main heat storage body 4 in which a heating wire 3 is embedded, and a pair of auxiliary heat storage bodies 5 joined to both outer sides thereof. 5A. 6 is a heat insulating part surrounding the outer periphery of the heat storage part 2, 7 is a main heat exchange passage penetrating in the central longitudinal direction of the main heat storage body 4, and 8 is a vertical heat storage part formed on the inner side surface of one auxiliary heat storage body 5. An auxiliary heat exchange passage 8A formed by the cutout portion A and one side surface of the main heat storage body 4 corresponds to a vertical cutout portion B formed on the outer side surface of the other auxiliary heat storage body 5A in the same manner as described above. This is the other heat exchange passage formed with the inside of the heat insulating portion 6.

A heat outlet 9 is provided above the heat storage unit 2 and guides heat in a heat exchange passage to an air outlet 10 formed at an upper portion of the front surface of the main body case 1. A heat exchange outlet 11 is provided below the heat storage unit 2. A blower port 12 communicating with the passage is connected to the blower port 11, and the back face 1 </ b> A of the main body case facing the blowout port 10 and the heat insulating portion 6.
And a cool air passage 13 which communicates with the heat outlet 9 and reaches the air outlet 10. The cold air passage 13 receives outside air taken from a suction port 14 formed in a lower portion of the back surface 1 </ b> A of the main body case 1.
1 and a fan for forcibly blowing air to the cold air passage 12.

[0004] The conventional electric hot air blower is configured as described above. For example, by driving a fan 13, air is blown to an air outlet 11 and a cool air passage 12. , 5A, heat exchanged into hot air, discharged from the heat outlet 9 to the upper portion of the cold air passage 12, mixed with the cool air sent to the cold air passage 12, and heated to an appropriate temperature. It is blown out from 10 to the outside.

[0005]

In the above-described conventional electric hot air blower, the main heat exchange passage 7 penetrated in the central longitudinal direction of the main heat storage element 4 and the inner surface of one auxiliary heat storage element 5 are provided. The auxiliary heat exchange passage 8 formed by the vertical notch portion A formed on one side of the main heat storage element 4 and the vertical notch portion B formed on the outer side surface of the other auxiliary heat storage element 5A in the same manner as described above. And a corresponding heat exchange passage 8A formed by the corresponding heat insulating portion 6, and the air blown to the blower opening 11 mainly passes through the heat exchange passages 7, 8, 8A. It receives heat radiation from the heat storage body 4 and the auxiliary heat storage bodies 5 and 5A, exchanges heat to form hot air, and is discharged from the heat outlet 9 to the upper part of the cold air passage 12.
8 and 8A are main heat storage element 4 and auxiliary heat storage elements 5 and 5A, respectively.
The heat stored in the main heat storage element 4 and the auxiliary heat storage elements 5 and 5A is dissipated only through the heat exchange passages 7, 8, and 8A provided in the part. However, since only a part of the main heat storage element 4 and the auxiliary heat storage elements 5 and 5A contribute to heat radiation, the heat exchange efficiency of the heat storage device 1 including the main heat storage element 4 and the auxiliary heat storage elements 5 and 5A is extremely low. was there.

[0006] The present invention has been made to solve such a problem, and an object of the present invention is to provide an electric hot air blower capable of improving the heat exchange efficiency of a heat storage device.

[0007]

According to a first aspect of the present invention, there is provided an electric hot air blower provided with one outlet provided in a box-shaped hot air blower main body, and provided in the hot air blower main body, A first air passage leading to an air outlet, a blower fan for blowing air toward the air outlet in the first air passage,
A hot air heater provided in the middle of the air passage, a heat storage container communicating with the middle of the first air passage, a heat storage device provided in the heat storage container, and a heat storage device provided in the heat storage container. An inverted U-shaped second air passage having an inflow portion and an outflow portion communicating with the middle of the first air passage, and a damper mechanism for opening and closing the inflow portion and the outflow portion. In the electric hot air blower comprising, the heat storage device comprises a rectangular parallelepiped heat storage brick and a heat storage heater built in the heat storage brick, between both ends of the heat storage brick and the inner surface of the heat storage container opposed thereto. It is constituted by providing a partition plate.

According to a second aspect of the present invention, a heat radiating plate having a large number of fins is arranged on a side surface of a heat storage brick located at least on an inlet side of a second air passage.

According to a third aspect of the present invention, there is provided an electric hot air blower, wherein a plurality of vertical grooves are provided on both side surfaces of the heat storage brick, and a heat radiating plate having a large number of fins is arranged on at least one side surface of the heat storage brick. The plane opposite to the side on which the plate fins were provided was brought into contact with the side surface of the heat storage brick, and a brick-side air passage and a fin-side air passage were formed on one side surface of the heat storage brick through the heat sink. Things.

According to a fourth aspect of the present invention, there is provided an electric hot air blower, wherein a plurality of vertical grooves are provided on both side surfaces of the heat storage brick, and a heat radiation plate having a large number of fins is arranged on at least one side surface of the heat storage brick. Are formed on the surface on the opposite side to the fins to be fitted into the plurality of vertical grooves of the heat storage brick, and the plurality of protrusions of the heat sink are formed by the plurality of vertical portions of the heat storage brick. It is fitted in the groove.

According to a fifth aspect of the present invention, there is provided an electric hot air blower in which heat radiating plates having a large number of fins are arranged at both ends of a heat storage brick.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a cross-sectional view showing a configuration of an electric hot air blower according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing an inner case of a heat storage container accommodating a heat storage device of the electric hot air blower, and FIG. It is a cross-sectional view of the inner case of the heat storage container which accommodated the heat storage device of the warm air blower. In the figure, the electric hot air blower of the present invention includes a hot air blower main body 21 configured in a box shape, an intake port 22 and an air outlet 23 provided in the hot air blower main body 21,
An L-shaped bent first air passage 24 communicating with the air inlet 22 and the air outlet 23, and a blower fan driven by a fan motor 25 for blowing air into the first air passage 24 toward the air outlet 23. 26, a self-temperature control type hot air heater 28 having a characteristic of automatically switching the heat generation capacity according to the ambient temperature provided in the middle of the first air passage 24.
And a heat storage container 29 communicating with the middle of the first air passage 24.
And a heat storage device 31 provided in the heat storage container 29, and an inlet portion 35 and an outlet portion communicating with the middle of the horizontal portion of the first air passage 24 when the heat storage device 31 is provided in the heat storage container 29. And a damper mechanism 37 that opens and closes the inflow port 35 and the outflow port 36 of the second ventilation path 30. The second ventilation path 30 has an inverted U-shape. I have. Reference numeral 27 denotes a control circuit provided at an upper portion in the main body 1 of the hot air blower.

A first air passage 24 bent in an L-shape is provided.
Is composed of a back wall 21b and a bottom wall 21c having an air inlet 22 on the back surface of the hot-air device main body 21, a fan casing 32 provided inside the hot-air device main body 21 and covering the blower fan 26, and a bottom portion of the heat storage container 29. Have been. Furthermore, the heat storage container 29 which is provided inside the warm air blower main body 21 and is a heat insulating case in which the inside becomes the second air passage 30 includes an inner case 29a, a heat insulating material 29b of calcium silicate covering the inner case 29a, And an outer case 29c that covers the heat insulating material 29b. The inner case 29a is formed by combining a pair of half inner cases 29Aa and 29Ba, and has connection pieces 29Aa1 provided on the upper edge and the upper side edge of each half inner case 29Aa and 29Ba.
, 29Ba1 are fastened together by bolts 47 and nuts 48 and are integrally assembled. Then, a second air passage 30 is formed in the inner case 29 a of the heat storage container 29, and the heat storage device 31 is arranged in the middle of the second air passage 30. The lower end of the outer case 29c of the heat storage container 29 is connected to the lower end of the fan casing 32.

The heat storage device 31 includes a pair of sensible heat type heat storage bricks 3 formed in a brick shape using magnesium oxide as a main material and a material containing silica, alumina, and ferric oxide.
3 is provided with a heat storage heater 34 as a sheathed heater. Bands 33a for band positioning are provided on the top and side surfaces of the pair of heat storage bricks 33. This heat storage device 31 is the inner case 29 of the heat storage container 29.
a, the second air passage 30 is configured to be bent in a substantially inverted U-shape in the inner case 29a. Reference numeral 29d denotes a support case provided at the lower center of the inner case 29a and supporting the heat storage device 31 on the upper surface. Both ends of the support case 29d are connected and fixed to lower ends of the inner case 29a.

Then, a metal positioning band 41 is fitted into the band positioning groove 33a of the pair of heat storage bricks 33, and the positioning band 41 is fastened to the side of the support case 29d with a screw 42, whereby the pair of heat storage bricks 33 is fixed. The heat storage bricks 33 are combined together in a positioned state and fixed on the support case 29d. In addition, both the side walls of the support case 29d and the lower end of the inner case 29a form an inlet 35 and an outlet 36 of the second air passage 30 communicating with the first air passage 24. The power consumption of the heat storage heater 34 of the heat storage device 31 is approximately 520
With W, the surface temperature of the heat storage brick 33 rises to about 500 ° C.

Further, partition plates 43 are provided between both ends of the heat storage brick 33 and the inner surface of the inner case 29a of the heat storage container 29 opposed thereto. This partition plate 43
Are the half inner cases 29Aa, 29A of the inner case 29.
It is configured by combining two partition pieces 43a provided at the butting portions of the edges of Ba. Then, the partition pieces 43a provided at the edge of each half inner case 29Aa, 29Ba are fitted into a concave portion 33a provided at the center of the end of the heat storage brick 33, thereby forming two partition pieces 43a.
Is provided between both ends of the heat storage brick 33 and the inner surface of the inner case 29a opposed thereto.

The length of the partition plate 43 in the vertical direction is the same as the length of the end of the heat storage brick 33. Thus, the bent portion of the second air passage 30 is formed above the heat storage brick 33 without being interrupted. in this way,
Partition plates 43 are provided between both ends of the heat storage brick 33 and the inner surface of the inner case 29a, respectively.
Are fixed to the lower ends of the inner case 29 a, so that the entire surface except the lower surface of the heat storage brick 33 is exposed to the second air passage 30.

The inflow port 35 and the outflow port 36 of the second air passage 30 are opened and closed by an opening / closing plate 38 of a damper mechanism 37. A shaft 39 provided adjacent to the inner end edge of the inner wall surface is rotatably supported, and a geared motor 40 is connected to the shaft 39. And the geared motor 40
The shaft 39 is driven by this, and the opening / closing plate 38 is driven by this drive.
Is turned around the shaft 39 as a fulcrum to close the inflow port 35 and the outflow section 36, and to a state where the substantial opening amounts of the inflow port 35 and the outflow section 36 are adjusted in a plurality of stages to open. It is to be set.

Further, a self-temperature control type hot air heater 28 is provided in a horizontal portion of the first air passage 24, and the hot air heater 28 is disposed in a horizontal portion of the first air passage 24. Is provided in the ventilation hood 24a having a predetermined length.
On an upper surface of the ventilation hood 24a, a closing plate 24 for closing an upper passage of the ventilation hood 24a in the first ventilation path 24 is provided.
b is attached so that air is blown only into the ventilation hood 24a. Accordingly, when the opening / closing plate 38 of the damper mechanism 37 closes the inlet 35 and the outlet 36 of the second air passage 30, the ventilation hood 24 is closed.
The air is blown only in a.

The control circuit section 27 is provided directly below the upper surface of the main body 21 of the hot air blower. Various operation buttons 45 on the operation panel 44 of the control circuit section 27 are exposed on the upper surface of the main body 21 of the hot air blower. It is provided in. Further, a control circuit section 27 is provided on the upper side in the hot air heater main body 21 with a heat storage device 31.
A heat shield plate 46 that shields from the air is provided to be inclined. Further, in this embodiment, the fan motor 25 is switched to, for example, a three-stage rotation speed via the control circuit unit 27. By this switching, the air volume (wind speed) blown from the blower fan 26 is set to strong, medium, and weak.

Next, the operation of the electric hot air blower according to Embodiment 1 of the present invention will be described. For example, the heat storage heater 34 is energized by pressing the heat storage operation button 45, and the heat storage brick 34 is heated by the heat storage heater 34, and the heat is gradually stored in the heat storage brick 33.
Heat storage is completed in minutes. During this heat storage, the second air passage 3
The inflow port 35 and the outflow port 36 are the damper mechanism 37.
The opening / closing plate 38 is closed, whereby the inflow of air into the second air passage 30 is prevented, and efficient heat storage is performed. After sufficient heat has been stored in the heat storage device 31 in this way, a predetermined operation button 45 of the operation panel 44 is operated to set rapid heating. Then, the opening / closing plate 38 of the damper mechanism 37 rotates under the control of the geared motor 40, and the inflow port 35 and the outflow port 36 are opened.

When the warm air heater 28 and the fan motor 25 are energized, the warm air heater 28 generates heat and the blower fan 26 rotates. Due to the rotation of the blower fan 26, air outside the warm air blower main body 21 flows from the intake port 22 to the first
Is sucked into the air passage 24 of the first air passage 2
The air is blown toward the warm air heater 28 through the inside 4. The air is heated by contacting the hot air heater 28 to become hot air, and the hot air is sequentially blown toward the outlet 23.

A part of the air flowing through the first air passage 24 flows into the second air passage 30 from the inflow port 35, and the heat storage device is circulated through the second air passage 30. 31, and absorbs the heat stored in the heat storage bricks 33 of the heat storage device 31 to become hot air.
Are sequentially blown toward. Thus, the inner case 2
Partition plates 43 are respectively provided between both ends of the heat storage brick 33 supported by the support case 29d whose both ends are connected and fixed to both lower ends of the lower portion 9a and the inner surface of the inner case 29c of the heat storage container 29 opposed thereto. Except for the lower surface of the heat storage brick 33, not only the upper surface and both side surfaces but also the entire surface including the end surface is exposed to the second air passage 30. Heat exchange passages 7, 8, 8A are provided in a part of the conventional main heat storage body 4 and auxiliary heat storage bodies 5, 5A in order to radiate heat from the entire surface of the pair of heat storage bricks 33 to the air entering the air passage 30. As a result, substantially the entire surface of the pair of heat storage bricks 33 contributes to heat radiation as compared with the heat storage bodies 4, 5, and 5A that only partially contribute to heat radiation, and the heat exchange efficiency of the pair of heat storage bricks 33 improves. Things.

Then, the warm air flowing out of the outlet 36 and the warm air flowing in the first air passage 24 are connected to the outlet 23.
And mixed inside, and the mixed warm air is blown out from outlet 2
3 blows out to the front of the warm air blower main body 21. In this way, the interior of the room is, for example, about
Warm in minutes. The heat storage bricks 33 of the heat storage device 31
The time during which the amount of heat stored in the heat storage brick 33 is released is about 30 minutes, and thereafter, the temperature of the heat storage brick 33 gradually decreases. Therefore, when the temperature detected by the temperature sensor (not shown) is equal to or lower than a predetermined temperature, for example, 100 ° C., the control circuit 27 controls the geared motor 40 and the damper mechanism 37.
Of the inlet port 35 and the outlet port 3
6 is closed, and thereafter, it is shifted to normal heating.

On the other hand, when the normal heating is set, the opening / closing plate 38 of the damper mechanism 37 is rotated by the control of the geared motor 40 so that the inlet 35 and the outlet 36 are closed, and the air is blown from the blower fan 26. Hot air heater 2
Sent around 8. Then, the hot air heater 28 generates heat with a capacity corresponding to the air volume of the air, and the air is heated by the generated heat to become a predetermined hot air, which is blown out from the outlet 23.

Embodiment 2 FIG. FIG. 4 is a cross-sectional view of an inner case of a heat storage container accommodating a heat storage device of an electric hot air blower according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment in that the partition plates 43 are provided between both ends of the heat storage brick 33 and the inner surface of the inner case 29a of the heat storage container 29 opposed thereto, respectively. A large number of fins 5 are provided on both side surfaces and both end surfaces of the heat storage brick 33, respectively.
1 is disposed. And the heat sink 50 arranged on each side of the pair of heat storage bricks 33.
Is fixed to the inner case 29a by screws 52, and the radiator plate 50, which is in contact with each end face of the pair of heat storage bricks 33, has its ends fixed to the pair of heat storage bricks 33 by screws (not shown). Have been.

As described above, the partition plates 43 are provided between both ends of the heat storage brick 33 and the inner case 29c opposed thereto, and substantially the entire surface of the heat storage brick 33 is provided in the second air passage 3.
In addition to improving the heat exchange efficiency of the heat storage bricks 33 by exposing the heat storage bricks 33, the heat radiating plates 50 each having a large number of fins 51 are disposed on both side surfaces and both end surfaces of the pair of heat storage bricks 33. In the case of rapid heating,
The air that has entered the second air passage 30 from the air passage 24 passes through the large number of fins 51 of the heat radiating plate 50 to which heat is transmitted from the heat storage brick 33, so that the heat exchange efficiency is further improved. FIG. 4 shows an example in which two heat radiating plates 50 are arranged on both side surfaces of a pair of heat storage bricks 33, respectively, but one heat radiating plate 50 is arranged on one side surface of the heat storage brick 33. You may make it.

Embodiment 3 FIG. 5 is a cross-sectional view of an inner case accommodating a heat storage device of an electric hot air blower according to Embodiment 3 of the present invention. In the third embodiment, the second embodiment
Partition plates 41 are provided between both ends of the heat storage brick 33 and the inner surface of the inner case 29a of the heat insulating case 29 which is a heat storage container facing the storage brick 33, and a large number of the end plates of the pair of heat storage bricks 33 are provided respectively. In addition to the arrangement of the heat sink 50 having the fins 51, a plurality of vertical grooves 33 c are provided on both side surfaces of the heat storage brick 33. And the heat sink 5
The flat surface on the side opposite to where the zero fins 51 are provided abuts against each side surface of the heat storage brick 33, and the end of the heat sink 50 is fixed to the inner case 29 a with screws 52, and each side of the heat storage brick 33 Brick side air path 3 through heat sink 50
0A and a fin-side air passage 30B.

As described above, the partition plates 43 are provided between both ends of the heat storage brick 33 and the inner case 29c opposed thereto, and substantially the entire surface of the heat storage brick 33 is provided in the second air passage 3.
By exposing to 0, the heat exchange efficiency of the heat storage brick 33 is improved, and the brick-side air passage 30A and the fin-side air passage 30B are formed on each side of the heat storage brick 33 via the heat sink 50. Due to the formation, heat generated from the heat storage brick 33 is directly radiated from the heat storage brick 33 of the brick-side air passage 30A, and heat transmitted through the heat sink 50 is transmitted to the fin-side air passage 3.
By radiating the heat through the fins 51 of the OB, the heat exchange efficiency is further improved in the two air paths. In FIG. 5, two heat sinks 50 are paired with a pair of heat storage bricks 3.
3 shows an example in which the heat radiating plates 50 are disposed on both side surfaces of the heat storage brick 33, respectively.

Embodiment 4 FIG. 6 is a cross-sectional view of an inner case accommodating a heat storage device of an electric hot air blower according to Embodiment 4 of the present invention. In the third embodiment, the second embodiment
The partition plate 43 is provided between both ends of the heat storage brick 33 and the inner surface of the inner case 29a of the heat storage container 29 opposed thereto.
Are provided, and a plurality of vertical grooves 33c are provided on both side surfaces of the heat storage brick 33 in addition to the heat radiating plate 50 having a large number of fins 51 disposed on both end surfaces of the pair of heat storage bricks 33, respectively. Further, the heat radiating plate 50 disposed on each side surface of the pair of heat storage bricks 33 has a plurality of convex portions which are fitted to the plurality of vertical grooves 33c of the heat storage bricks 33 on the surface opposite to the side on which the fins 51 are provided. The heat sink 50a is formed by bending the heat sink 50 itself. Then, the heat radiating plate 50 has its end portion screwed into the inner case 29a.
And the plurality of convex portions 50 a are fitted into the plurality of vertical grooves 33 c of the heat storage brick 33.

As described above, the partition plates 43 are provided between both end portions of the heat storage brick 33 and the inner case 29c opposed thereto, and substantially the entire surface of the heat storage brick 33 is
0, the heat exchange efficiency of the heat storage brick 33 is improved, and the plurality of convex portions 50 of the radiator plate 50 are increased.
By fitting a into the plurality of vertical grooves 33c of the heat storage brick 33, the surface area of the heat storage brick 33 and the heat radiating plate 50 increases, and accordingly, the heat radiating area of the heat radiating plate 50 increases, and the heat generated by the heat radiating plate 50 increases. The exchange efficiency is further improved. FIG. 6 shows an example in which two heat radiating plates 50 are arranged on both side surfaces of a pair of heat storage bricks 33, respectively, but one heat radiating plate 50 is arranged on one side surface of the heat storage brick 33. You may make it.

[0032]

As described above, according to the electric hot air blower according to the first aspect of the present invention, the inverted U-shaped second air blower provided in the heat storage container communicating with the middle of the first air blow path. The heat storage device that forms the path includes a rectangular parallelepiped heat storage brick and a heat storage heater built in the heat storage brick, and partition plates are provided between both ends of the heat storage brick and the inner surface of the heat storage container facing the same. Therefore, almost the entire surface of the heat storage brick is exposed to the second air passage, and in the case of rapid heating, heat is radiated from substantially the entire surface of the heat storage brick to air entering the second air passage from the first air passage. Therefore, there is an effect that the heat exchange efficiency is improved as compared with a conventional heat storage element that releases heat only partially.

According to the electric hot air blower according to the second aspect of the present invention, since the heat radiating plate having a large number of fins is arranged on the side of the heat storage brick located at least on the inlet side of the second air passage, rapid heating is achieved. In this case, the air that has entered the second air passage from the first air passage passes through a large number of fins of the heat radiating plate to which heat is transmitted from the heat storage bricks, so that the heat exchange efficiency is further improved.

According to the electric hot air blower of claim 3 of the present invention, a plurality of vertical grooves are provided on both side surfaces of the heat storage brick, respectively.
A heat sink having a large number of fins is arranged on at least one side surface of the heat storage brick, and a plane opposite to the side on which the fins of the heat storage plate are provided is brought into contact with the side surface of the heat storage brick, and one side surface of the heat storage brick Since the brick-side air passage and the fin-side air passage are formed via the heat sink, the heat from the heat storage brick is directly radiated from the heat storage brick in the brick side air passage, and the heat transmitted through the heat sink is By dissipating heat through the fins on the fin side air passage, there is an effect that the heat exchange efficiency is further improved in the two air passages.

According to the electric hot air blower according to claim 4 of the present invention, a plurality of vertical grooves are provided on both side surfaces of the heat storage brick, and a heat radiating plate having a large number of fins is arranged on at least one side surface of the heat storage brick. The heat radiating plate has a plurality of convex portions fitted to the plurality of vertical grooves of the heat storage brick on a surface on a side opposite to the side on which the fins are provided. Since the heat storage brick and the heat radiating plate have a large surface area, the heat radiating area of the heat radiating plate increases, and the heat exchange efficiency of the heat radiating plate is further improved.

According to the electric hot air blower according to the fifth aspect of the present invention, since the heat radiating plate having a large number of fins is disposed at both ends of the heat storage brick, the heat is released by the fins of the heat radiating plate even at the end of the heat storage brick. Is performed, and the heat exchange efficiency is further improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of an electric hot air blower according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing an inner case accommodating a heat storage device of the electric warmer.

FIG. 3 is a cross-sectional view of an inner case accommodating a heat storage device of the electric hot air blower.

FIG. 4 is a cross-sectional view of an inner case of a heat storage container accommodating a heat storage device of an electric hot air blower according to Embodiment 2 of the present invention.

FIG. 5 is a cross-sectional view of an inner case of a heat storage container accommodating a heat storage device of an electric hot air blower according to Embodiment 3 of the present invention.

FIG. 6 is a cross-sectional view of an inner case accommodating a heat storage device of an electric hot air blower according to Embodiment 4 of the present invention.

FIG. 7 is a simplified vertical cross-sectional view showing a configuration of a conventional electric hot air blower.

8 is a cross-sectional view of a main part taken along line VIII-VIII of FIG. 7;

FIG. 9 is a perspective view of a heat storage unit.

[Explanation of symbols]

21 Hot air blower body, 23 outlet, 24 first air passage, 26 air fan, 28 hot air heater, 29 heat storage container, 30 second air passage, 31 heat storage device, 33 heat storage brick, 34 heat storage heater, 35 flow Inlet part, 36 outlet part, 37 damper mechanism, 43 partition plate.

Claims (5)

[Claims] 1. An air outlet provided in a box-shaped main body of a hot air blower, a first air passage provided in the main body of the hot air blower and communicating with the air outlet, and the first air blow path A blower fan for blowing air toward the air outlet,
A hot air heater provided in the middle of the air passage, a heat storage container communicating with the middle of the first air passage, a heat storage device provided in the heat storage container, and a heat storage device provided in the heat storage container. An inverted U-shaped second air passage having an inflow portion and an outflow portion communicating with the middle of the first air passage, and a damper mechanism for opening and closing the inflow portion and the outflow portion. In the electric hot air blower comprising, the heat storage device comprises a rectangular parallelepiped heat storage brick and a heat storage heater built in the heat storage brick, between both ends of the heat storage brick and the inner surface of the heat storage container opposed thereto. An electric hot air blower characterized by having a partition plate. 2. The electric hot air blower according to claim 1, wherein a heat radiating plate having a large number of fins is disposed on a side surface of the heat storage brick located at least on an inlet side of the second air passage. 3. A plurality of vertical grooves are provided on both side surfaces of the heat storage brick, and a heat radiating plate having a large number of fins is arranged on at least one side surface of the heat storing brick, opposite to the fins of the heat radiating plate being provided. The brick-side air passage and the fin-side air passage are formed on one side surface of the heat storage brick through the heat radiating plate, the flat surface being in contact with the side surface of the heat storage brick. Hot air blower. 4. A plurality of vertical grooves are provided on both side surfaces of the heat storage brick, and a heat radiating plate having a large number of fins is arranged on at least one side surface of the heat storing brick, and the heat radiating plate is on the side opposite to the side on which the fins are provided. A plurality of convex portions fitted to the plurality of vertical grooves of the heat storage brick, and a plurality of convex portions of the heat sink are fitted to the plurality of vertical grooves of the heat storage brick. The electric warm air blower according to claim 1. 5. The electric hot air blower according to claim 1, wherein heat radiating plates each having a large number of fins are arranged at both ends of the heat storage brick.