JP3416864B2 - 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 an electric warm air blower for blowing warm air from an outlet using, for example, a warm air heater and a heat storage device, and more particularly to a device for efficiently operating the heat storage device.

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view showing the structure of a conventional electric warmer disclosed in, for example, Japanese Unexamined Patent Publication No. 6-300361. The conventional electric air blower has a box-shaped warm air blower main body 1, an intake port 2 and an outlet 3 provided in the warm air blower main body 1, and an L-shaped bend communicating with the intake port 2 and the blowout port 3. The first blower passage 4 and the blower fan 6 that blows air toward the outlet 3 in the first blower passage 4
A self-temperature control type blast heater 8 provided in the middle of the first blast passage 4, and a branch from the middle of the vertical portion of the first blast passage 4 through the inflow port 15, and The second blower passage 10 in which the outlet portion 16 on the tip side is connected to the inside of the blower outlet 3 and communicates with the first blower passage 4;
A heat storage device 11 provided on the way in the air passage 10 of
A damper mechanism 17 that opens and closes the inflow port 15 is generally configured. Reference numeral 7 is a control circuit portion provided in the upper portion of the warm air blower main body 1.

This self-temperature control type heater 8 has a characteristic of automatically switching the heat generation capacity according to the ambient temperature, and the air volume (air velocity) of the air flowing around the hot air heater increases to increase the warm air. When the temperature around the heater drops,
The heat generation capacity is increased to heat the air with high power consumption. Conversely, when the air volume (wind speed) decreases and the temperature around the hot air heater rises, the heat generation capacity is weakened and the air is heated with low power consumption. As a result, it is possible to blow warm air having a substantially constant temperature regardless of the switching of the air volume (wind speed).

The conventional electric air blower is constructed as described above. For example, after storing sufficient heat in the heat storage device 11, the electric air blower is provided on the front upper part of the warm air blower main body 1 and the control circuit section 7 is provided.
When the quick heating is set by operating a predetermined operation button 23 of the operation panel 22 electrically connected to the control panel 22, the opening / closing plate 18 of the damper mechanism 17 is rotated by the control of the geared motor 20 and the inlet port 15 is opened. Is released. When the warm air heater 8 and the blower motor 5 are energized, the warm air heater 8 generates heat, and the blower fan 6 rotates, the rotation of the blower fan 6 causes the air outside the warmer body 1 to blow the first blower air. The air is blown to the side where the warm air heater 8 is disposed through the passage 4. Then, the air comes into contact with the warm air heater 8 to be heated to become warm air, and the warm air is sequentially blown toward the air outlet 3.

A part of the air flowing in the first air passage 4 flows into the second air passage 10 from the inlet portion 15,
The heat storage device 11 is provided while flowing through the second air passage 10.
Contacting with the heat storage device 11, the heat storage heater 13 of the heat storage device 11 absorbs the heat stored in the heat storage body 12 to form warm air,
This warm air is sequentially blown toward the outlet 16. Then, the hot air flowing out from the outlet part 16 and the hot air flowing in the first air passage 4 are mixed inside the air outlet 3, and the mixed hot air is discharged from the air outlet 3 into the warm air blower body 1 Blows out in front of. The amount of heat stored in the heat storage body 12 of the heat storage device 11 decreases with the passage of time, and after a certain period of time,
Although the temperature of the warm air flowing out from the outlet 16 decreases, the warm air flowing out of the outlet 16 does not blow out from the outlet 3 as it is, but the hot air flowing through the first air passage 4 has a constant temperature. And the inside of the blowout port 3 are mixed, mixed and blown out. Therefore, warm air having a uniform temperature distribution is blown in front of the warm air blower main body 1, and the warmer does not feel uncomfortable cold wind. Further, since the temperature distribution of the warm air is uniform, the warm air with a high temperature does not rise upward in the room, and the warm air with a low temperature is not blown to the lower part of the room, and the entire room is efficiently Can be heated well.

[0006]

In the conventional electric hot air blower as described above, the hot air blower is bent in an L shape provided in the warm air blower main body 1 and has a self-temperature control type hot air heater 8 in the middle thereof. The second air passage 10 that communicates with the first air passage 4 is
The inflow port 15 is connected to the middle of the vertical part of the first air passage 4, the outflow port 16 is connected to the inside of the blowout port 3, and the inflow port 15 is opened and closed by the damper mechanism 17. Therefore, in the case of rapid heating, when the inflow port 15 is opened by the damper mechanism 17, the air outside the warm air blower main body 1 is blown from the intake port 2 by the rotation of the blower fan 16. The air is sucked into the passage 4 and is blown to the side where the warm air heater 18 is arranged through the inside of the first blow passage 4. At this time, a part of the air flowing through the inside of the first blow passage 4 is Part 15 to second air passage 10
The heat storage body 11 of the heat storage device 11 comes into contact with the heat storage device 11 while flowing in the second air passage 10
The heat stored in the air is absorbed to become warm air, and this warm air is sequentially blown toward the outlet portion 16, but the wind entering the second blow passage 10 enters the first blow passage 4. On the other hand, since the air enters the inside through one bent portion, a part of the air flowing in the first air passage 4 is less likely to enter the second air passage 10 due to the pressure loss at the bent portion. Therefore, there is a problem that a sufficient amount of warm air is difficult to be blown from the outlet 16.

Further, a control circuit section 7 is provided in the upper part of the box-shaped warm air blower main body 1, and only the intake port 2 and the blowout port 3 communicate with the outside, and the others are hermetically sealed. Therefore, when the heat storage device 11 stores heat, the heat storage device 11 is covered with the heat insulating case 9 formed of a heat insulating material,
The heat generated from the outer surface of the heat insulating case 9 rises to reach about 70 ° C., and the heat is trapped in the upper part of the warm air blower main body 1.
There is also a problem that the control circuit unit 7 is heated by the accumulated heat and the service life of the control circuit unit 7 is shortened due to the influence of the heat.

The present invention has been made in order to solve such a problem, and a part of the air flowing in the first air passage is sufficiently introduced into the second air passage so that a sufficient air volume can be obtained. The hot air is blown from the outlet to prevent heat from being trapped in the upper part of the warmer body, and the control circuit part is not affected by the heat in the upper part of the warmer body. Aim to get.

[0009]

An electric warmer according to the present invention is provided with one blower outlet provided in a box-shaped warmer body and one blower outlet provided in the warmer body to communicate with the blower outlet. A first blower passage, a blower fan that blows air toward the outlet in the first blower passage, a warm air heater provided in the middle of the first blower passage, and the first blower passage. A second blower passage having an inlet part connected in the middle of the blower passage and an outlet part connected to the inside of the blower outlet, the second blower passage communicating with the first blower passage, and the second blower The electric warmer comprising a heat storage device provided in the middle of the passage and a damper mechanism for opening and closing the inflow port,
The inflow port and the outflow port of the blower passage are formed so that their diameters gradually increase toward the ends. Further, the first
In the air passage, the passage is narrower than the lower side from the position immediately below the tip end portion when the opening / closing plate of the damper mechanism for opening / closing the inlet of the second air passage is opened to the upstream side thereof by a predetermined length. A passage narrowing plate is provided.

Further, a control circuit section is provided in an upper portion of the warm air blower main body, and a heat shield plate is provided on an upper side of the warm air blower main body to shield the control circuit section from the heat storage device. The first chamber having the heat storage device partitioned by the heat shield plate is provided with a first exhaust port for releasing the heat inside thereof to the outside, and the control partitioned by the heat shield plate in the blower body The second chamber having the circuit portion is provided with the second exhaust port for releasing the heat inside the second chamber to the outside.

Further, a control circuit portion is provided in an upper portion of the warm air blower main body, and a heat shield plate for shielding the control circuit portion from the heat storage device is provided in an upper portion of the warm air blower main body. In the room having the heat storage device partitioned by the heat shield plate, an exhaust port for releasing the heat inside is provided to the outside,
A metal fixing band is attached to the upper part of the heat insulating case having the second air passage therein, and the end of the fixing band is attached and fixed to the fan casing covering the blower fan by the fixing means. There is.

Furthermore, the heat storage device comprises a pair of rectangular parallelepiped heat storage bodies each having a heater housing groove on the opposite side surfaces, and a heat storage heater sandwiched between the pair of heat storage bodies. Band positioning grooves are provided on the upper surface and lower surface of the central portion and on the side surface that does not have a heater accommodating groove, and a metal positioning band is fitted into the band positioning grooves of a pair of heat storage bodies sandwiching the heat storage heater, and the positioning is performed. The pair of heat accumulators are integrally combined by fastening the band for fastening with fastening means.

In the present invention, since the inflow port and the outflow port of the second blower passage are formed so that their diameters gradually increase toward the ends, in the case of rapid heating, the rotation of the blower fan keeps the temperature high. The air outside the main unit of the wind blows from the intake port first
Of the air is blown through the first air passage to the side where the warm air heater is disposed, and a part of the air flowing in the first air passage is blown from the inlet to the second air passage. When the air flows into the passage, the air easily enters the second air passage, and the air that has entered the second air passage easily comes out of the outlet of the second air passage. The air will be blown from the outlet of the air passage.

Further, a passage of a predetermined length is provided in the first air passage from a position immediately below the tip end portion to a position upstream thereof when the opening / closing plate of the damper mechanism for opening / closing the inlet portion of the second air passage is opened. Since the passage narrowing plate is provided to narrow the air passage from the lower side thereof, the inflow air to the warm air heater defined by the tip of the opening / closing plate of the damper mechanism and the lower portion of the air passage in the first air passage. The cross-sectional area of the passage is reduced by making it narrower than the lower side of the passage by the passage constriction plate, and the cross-sectional area of the air passage at the inlet of the second air passage is relatively increased to facilitate the entry of air. By providing the passage narrowing plate, a pressure loss occurs due to the stepwise abrupt increase in the sectional area on the downstream side of the passage narrowing plate in the inflow air passage to the warm air heater, and air is introduced into the first blower passage. Difficult to enter Therefore, as a result, a part of the air flowing in the first air passage becomes easier to enter when it flows into the second air passage from the inlet portion, and a sufficient amount of warm air can be secured. Becomes

Further, a control circuit portion is provided in an upper portion of the warm air blower main body, and a heat shield plate for shielding the control circuit portion from a heat storage device is provided in an upper portion of the warm air blower main body, and the heat shield plate is provided in the warm air blower main body. A first room having a heat storage device partitioned by a heat plate is provided with a first exhaust port for releasing the heat inside thereof to the outside, and a control circuit section partitioned by the heat shield plate in the main body of the warm air blower. Since the second chamber has a second exhaust port for releasing the heat inside the room to the outside, the heat generated from the outer surface of the heat insulating case that covers the heat storage device during heat storage of the heat storage device is shielded by the heat shield plate and controlled. Since the circuit portion is never reached, the control circuit portion is not heated, and the service life of the control circuit portion is extended because it is not affected by heat.

Further, the heat that is shielded by the heat shield plate and stays in the first room having the heat storage device is naturally emitted from the first exhaust port that releases the heat inside the first room provided in the first room to the outside. Since it is escaped to the outside by convection, the first room having the heat storage device is not heated. In addition, the second room, which has the control circuit section partitioned by the heat shield,
Although some heat is trapped by being heated by the heat shield plate or by the heat generated by the control circuit itself, it is naturally discharged from the second exhaust port in the second room, which allows the heat inside to escape to the outside. Since it is escaped to the outside by convection, the second room having the control circuit section is not heated.

Further, a control circuit section is provided in the upper part of the warm air machine body, and a heat shield plate is provided on the upper side of the warm air machine body to shield the control circuit section from the heat storage device. A room having a heat storage device partitioned by a heating plate is provided with an exhaust port for releasing the heat inside the room to the outside, and a metal fixing band is attached to the upper part of a heat insulating case having a second air flow passage therein, Since the end portion of the fixing band is attached and fixed to the fan casing that covers the blower fan by the fixing means, the heat insulating case having the second air blowing passage therein is fixed in the main body of the warm air blower, and the heat insulating is performed. The heat generated by the case is transferred to the fan casing through the metal fixing band, and the fan casing is cooled by the blower fan, so the radiant heat generated by the heat insulating case is further reduced. It becomes door.

The heat storage device is composed of a pair of rectangular parallelepiped heat storage bodies each having a heater storage groove on the opposite side surfaces, and a heat storage heater sandwiched between the pair of heat storage bodies. Band positioning grooves are provided on the upper and lower surfaces of the base plate and on the side surface having no heater housing groove, and a metal positioning band is fitted into the band positioning grooves of a pair of heat storage bodies sandwiching the heat storage heater. Since the pair of heat storage bodies are integrally combined by fastening with the fastening means, the metal positioning band positions the pair of heat storage bodies with the fastening means and combines them together, and Since the positioning band is exposed to the second air passage and radiates heat, the heat radiation efficiency of the heat storage device is improved.

[0019]

1 is a cross-sectional view showing the structure of an electric warmer according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a branch portion of a first blower passage of the electric warmer. FIG. 3 is a perspective view showing an appearance of a heat storage device of the electric air blower, and FIG. 4 is a perspective view showing a heat storage body of the heat storage device of the electric air blower. In the figure, the same configurations as those of the conventional example are denoted by the same reference numerals, and the description of the duplicated configurations is omitted, and the configuration different from the conventional example will be described. In this embodiment, the first air passage 4 bent in an L-shape has a rear wall 1b and a bottom wall 1c having an intake port 2 on the back surface of the warm air fan body 1, and a warm air fan body 1
And a bottom portion of the heat insulating case 9 and a fan casing 21 that is provided inside the fan cover 6 and covers the blower fan 6. A fine dust repair filter 24 is removably attached to the back wall 1b having the intake port 2.

Further, the heat insulating case 9 provided inside the warm air blower main body 1 and having the inside serving as the second air passage 10 has an inner case 9a, a calcium silicate heat insulating material 9b covering the inner case 9a, and a heat insulating material. The outer case 9c covers the material 9b. And the inner case 9 of the heat insulating case 9
a constitutes the second ventilation passage 10, and the heat storage device 11 is arranged in the middle of the second ventilation passage 10. The lower end of the outer case 9c of the heat insulating case 9 is connected to the lower end of the fan casing 21. Then, a metal fixing band 25 is attached to the upper part of the outer case 9c, and an end portion 25a of the fixing band 25 is attached to the fan casing 2
It is attached and fixed to the No. 1 with a screw 26.

In the heat storage device 11 of this embodiment, a heat storage heater 13 which is a sheathed heater is provided inside a pair of heat storage bodies 12 formed in a brick shape with magnesium oxide as a main component.
Is provided and configured. By disposing this heat storage device 11 in the inner case 9a of the heat insulating case 9,
The second ventilation passage 10 is formed in the inner case 9a so as to be bent in a substantially inverted U shape. 9d is a support case that is provided at the center of the lower part of the inner case 9a and supports the heat storage device 11. The second case communicates with the first air passage 4 by both side walls of the support case 9d and the lower end of the inner case 9a. An inflow port 15 and an outflow port 16 of the air passage 10 are formed.

The heat storage device 11 having the second ventilation passage 10 arranged in the inner case 9a has a pair of rectangular parallelepiped heat storage bodies 12 each having a heater storage groove 12a on the opposite side surface. And a pair of heat storage bodies 1
The heat storage heater 13 is sandwiched between the two. Band positioning grooves 37 are provided on the upper and lower surfaces of the central portion of each heat storage body 11 and on the side surface having no heater housing groove 12a. Then, a metal positioning band 38 is fitted into the band positioning grooves 37 of the pair of heat storage bodies 12 in which the heat storage heater 13 is sandwiched, and the positioning band 38 is fastened with the screw 39 and the bolt 40. The pair of heat storage bodies 12 are combined together in a positioned state. The power consumption of the heat storage heater 13 of the heat storage device 11 is about 520 W, and the surface temperature of the heat storage body 12 is about 500 ° C.
Rise to the rank.

Each heat storage body 12 of the heat storage device 11 is formed by providing trapezoidal recesses 41 located inside the end faces on the upper surface, the lower surface, and the side surface having no heater housing groove 12a. When the pair of heat storage bodies 12 combined with each other is arranged in the inner case 9a, the inner case 9a and the recesses 41 constitute the second air passage 10 in a state of being bent in a substantially inverted U shape. In addition, a plurality of vertical grooves 12b are provided in the vertical direction on the side surface of each heat storage body 12 that does not have the heater housing groove 12a in order to enhance heat dissipation efficiency.

The inflow port portion 15 of the second air blowing passage 10 is connected in the middle of the horizontal portion of the first air blowing passage 4, and the outlet portion 16 is at the tip end of the horizontal portion of the first air blowing passage 4. , Connected to the inside of the air outlet 3. The inflow port 15 and the outflow port 16 of the second blower passage 10 are formed such that the outer wall surfaces 15a and 16a, which are the lower end portions of the inner case 9a, are tapered and gradually increase in diameter toward the outside. There is. The taper angles of the outer wall surfaces 15a and 16a are set to about 10 degrees. Furthermore, the outer wall surfaces 15a, 16
The outer edge of a is formed into a curved surface in order to reduce the pressure loss in the bent portion. Further, the upper corner portion of the inner case 9a forming the second air passage 10 is also formed into a curved surface in order to reduce the pressure loss at the bent portion.

Further, the inflow port portion 15 of the second ventilation passage 10
Is opened / closed by an opening / closing plate 38 of the damper mechanism 17. The inner edge of the opening / closing plate 38 has an inner wall surface 15b of the inlet port 15.
The shaft 19 is rotatably supported by a shaft 19 provided adjacent to the inner end edge thereof, and a geared motor 20 is connected to the shaft 19. Then, the shaft 19 is driven by the geared motor 20, and the drive causes the opening / closing plate 18 to rotate around the shaft 19 as a fulcrum to close the inflow port 15.
The substantial opening amount of the inflow port 15 is adjusted in a plurality of stages to be opened. further,
A self-temperature control type hot air heater 8 is provided in the horizontal portion of the first air passage 4, and the warm air heater 8 has a predetermined length provided in the horizontal portion of the first air passage 4. It is arranged in the ventilation hood 27. A closing plate 28 for closing the upper passage of the ventilation hood 27 in the first ventilation passage 4 is attached to the upper surface of the ventilation hood 27 so that the air is blown only into the ventilation hood 27. There is. Therefore, when the opening / closing plate 18 of the damper mechanism 17 closes the inlet portion 15 of the second air passage 10, the ventilation hood 2
The wind is blown only inside 7.

Further, in the elbow portion of the first air passage 4, the opening / closing plate 18 of the damper mechanism 17 for opening / closing the inflow port 15 of the second air passage 10 is opened from the position directly below the tip end portion thereof. A passage narrowing plate 29 is provided which narrows the passage to the upstream side by a predetermined length from the lower side. Therefore, the width in the height direction of the passage in the elbow portion of the first air passage 4 is narrowed, and as a result, the air passage for the wind entering the ventilation hood 26 is narrowed by the passage narrowing plate 29. The width W of the passage narrowing plate 29 is formed to be the same as the width of the inlet portion 15 of the second blower passage 10, but there is no problem if the width W is larger than the width of the inlet portion 15. In addition, the air outlet 3 is provided in the air outlet portion which is the tip end side of the horizontal portion of the first air passage 4.
A step portion 30 is provided with the corner portion depressed slightly further. Due to the presence of the step portion 30, the wind blown from the lower part of the outlet 3 does not flow downward.

Further, the control circuit section 7 in this embodiment is provided immediately below the upper surface of the warm air fan body 1.
The control circuit section 7 includes a circuit housing box 7 a, a power supply board 7 b and an operation board 7 c housed in the circuit housing box 7 a, and an operation panel 22, and various operation buttons 2 on the operation panel 22.
3 is provided so as to be exposed at the upper surface of the warm air blower main body 1. Further, a heat shield plate 31 that shields the control circuit unit 7 from the heat storage device 11 is provided on the upper side of the warm air blower main body 1 in an inclined manner. Then, in the first chamber 32 having the heat storage device 11 partitioned by the heat shield plate 31 in the main body 1 of the warm air blower, the first exhaust port 33 for releasing the heat inside thereof to the outside is provided.
Is provided on the upper back side of the first room 32 and has the control circuit section 7 partitioned by the heat shield plate 31 in the main body 1 of the warm air blower. Two
The exhaust port 35 is provided on the upper rear side of the second chamber 34.

Further, in this embodiment, the blower motor 5
Can be switched to, for example, three rotation speeds via the control circuit unit 7. By this switching, the amount of air blown from the blower fan 6 (wind speed) is set to be strong, medium, or weak. Further, the warm air heater 8 provided in the middle of the first air passage 4 is a PCT heater having a self-temperature control function that automatically switches the heat generation capacity according to the ambient temperature. When the air volume of the blown air is weak, the air is heated with power consumption of 730W, when the air volume is medium, the air is heated with power consumption of 1000W, and when the air volume is high, with power consumption of 1350W. It is configured to heat the air. Further, the heat storage heater 13 incorporated in the heat storage device 11 provided in the second air passage 10 is configured to heat the heat storage body 12 with power consumption of about 520W. Further, a temperature sensor 43 that detects the temperature of the heat storage body 12 is provided in the support case 9d that is located directly below the heat storage body 12 of the heat storage device 11.

Next, the operation of the above embodiment will be described. The heat storage heater 13 is, for example, a heat storage operation button 23.
The heat storage heater 13 heats the heat storage body 12 by gradually pressing, and heat is gradually stored in the heat storage body 12, and the heat storage is completed in about 80 minutes. At the time of this heat storage, the inflow port portion 15 of the second air blowing passage 10 is closed by the opening / closing plate 18 of the damper mechanism 17, whereby the inflow of air into the second air blowing passage 10 is prevented, and efficient heat storage is achieved. Done.

After sufficient heat is stored in the heat storage device 11 in this manner, a predetermined operation button 23 on the operation panel 22 is operated to set the rapid heating. Then, under the control of the geared motor 20, the opening / closing plate 18 of the damper mechanism 17 is rotated to open the inlet port 15. Further, the warm air heater 28 and the blower motor 15 are energized, the warm air heater 18 generates heat, and the blower fan 16 rotates. By the rotation of the blower fan 16, the air outside the warm air blower main body 1 is sucked into the first blower passage 4 from the intake port 2, and this air passes through the first blower passage 4 and the side where the warm air heater 18 is disposed. Be blown to. Then, the air comes into contact with the warm air heater 18 to be heated and becomes warm air, and the warm air is sequentially blown toward the air outlet 3.

A part of the air flowing in the first air passage 4 flows into the second air passage 10 from the inlet portion 15,
The heat storage device 11 is provided while flowing through the second air passage 10.
In contact with the heat storage device 11 to absorb the heat stored in the heat storage body 12 of the heat storage device 11 to become warm air.
Will be blown toward. Then, the warm air flowing out from the outlet part 16 and the warm air flowing in the first air passage 14 merge and mix inside the outlet 3, and the mixed warm air is heated from the outlet 3. It blows out in front of the fan body 1. In this way, for example, a room with a size of 6 tatami mats will be 5 ℃ to 20 ℃.
It can be warmed up in about 18 minutes.

In this embodiment, when a part of the air flowing in the first air passage 4 flows into the second air passage 10 from the inlet portion 15, the flow in the second air passage 10 is increased. Since the diameter of the inlet portion 15 and the outlet portion 16 is gradually increased toward the ends, it is easy for air to enter the second air passage. In addition, the air that has entered the second air passage 10 is also easily discharged from the outlet portion 16 of the second air passage 10, and a sufficient amount of warm air is sent from the outlet portion 16 of the second air passage 10.

Further, when a part of the air flowing through the first air passage 4 flows into the second air passage 10 from the inflow port 15, the second air passage 2 is blown into the second air passage 4. Passage 10
Opening / closing plate 1 of a damper mechanism 17 for opening / closing the inlet port 15 of the
A passage narrowing plate 2 that narrows the lower side of the passage by a predetermined length from the position directly below the tip portion when it is opened to the upstream side thereof.
9 is provided, the cross-sectional area of the inflow air passage to the warm air heater 8 defined by the tip of the opening / closing plate 18 of the damper mechanism 17 in the first air passage 4 and the lower portion of the air passage 4 is the passage area. It becomes smaller by narrowing it from the lower side of the passage by the narrowing plate 29, the cross-sectional area of the air passage of the inflow port 15 of the second air blowing passage 10 relatively increases, and it becomes easier for air to enter. By providing 29, the passage narrowing plate 29 is provided in the inflow air passage to the warm air heater 8.
Pressure loss occurs due to the stepwise increase in the cross-sectional area on the more downstream side, and it becomes difficult for air to enter the first air passage 10, and as a result, the air that flows in the first air passage 4 is increased. From the inflow port 16 to the second ventilation passage 10
When it flows into the inside, it becomes easy to enter, and the second blow passage 10
In this, a sufficient amount of warm air will be secured.

The amount of heat stored in the heat storage body 12 of the heat storage device 11 decreases with the lapse of time, and after a certain period of time, the temperature of the hot air flowing out from the outlet 16 is lowered, but from the outlet 16 The hot air that flows out is the outlet 3 as it is.
Instead of being blown out from the blower, the hot air having a constant temperature flowing through the first blower passage 4 joins and mixes inside the blower outlet 3 and is blown out from the blower outlet 3. Therefore, warm air having a uniform temperature distribution is blown in front of the warm air blower main body 1, and therefore the warmer does not feel uncomfortable cold wind. Further, since the temperature distribution of the warm air is uniform, the warm air with a high temperature does not rise upward in the room, and the warm air with a low temperature is not blown to the lower part of the room, and the entire room is efficiently Can be heated well.

The amount of heat stored in the heat storage body 12 of the heat storage device 11 is released for about 30 minutes, and thereafter, the temperature of the heat storage body 12 gradually decreases. Therefore, when the temperature detected by the temperature sensor 43 is a predetermined temperature, for example, 100 ° C. or less, the control circuit unit 7 controls the geared motor 20 to rotate the opening / closing plate 18 of the damper mechanism 17 to close the inlet port 15. , After that, usually shift to heating. On the other hand, when the normal heating is set, the opening / closing plate 18 of the damper mechanism 7 is rotated by the control of the geared motor 20 to close the inlet port 15, and the entire amount of the air blown from the blower fan 6 is the warm air heater. Sent around 8. Then, the warm air heater 8 generates heat with an ability according to the air volume of the air, and the heat causes the air to be heated to become a predetermined warm air, and the warm air is blown out from the air outlet 3.

In addition, in this embodiment, the warm air blower body 1
A heat shield plate 31 that shields the control circuit unit 7 from the heat storage device 11 is provided on the upper side of the inside of the first room 32, which has the heat storage device 11 partitioned by the heat shield plate 31 inside the warm air blower body 1. Is provided with the first exhaust port 33 for releasing the heat of the outside to the outside, and the heat of the inside is released to the outside in the second chamber 34 having the control circuit section 7 partitioned by the heat shield plate 31 in the warm air blower main body 1. Two exhaust ports 35 are provided. Therefore, when the heat storage device 11 stores heat, the heat generated from the outer surface of the heat insulating case 9 that covers the heat storage device 11 is not shielded by the heat shield plate 31 and does not reach the control circuit unit 7.
Is no longer heated and is not affected by heat, so that the service life of the control circuit unit 7 is extended.

Further, the heat shielded by the heat shield plate 31 and stored in the first room 32 having the heat storage device 11 is the first heat.
The first room having the heat storage device 11 is released to the outside by natural convection generated along the inclined heat shield plate 31 from the first exhaust port 33 that releases the heat inside the room 32 provided to the outside. The temperature of the first chamber 32 has risen to about 30 ° C., which was about 70 ° C. in the conventional sealed state, since 32 is no longer heated. Further, the heat shield plate 31
Second room 3 having control circuit section 7 partitioned by
4 is also heated by the heat shield plate 31 to some extent or is heated by the heat generated by the control circuit unit 7 itself, so that heat is accumulated.
Since the heat inside the second chamber 34 is released to the outside from the second exhaust port 35, which is released to the outside by natural convection that occurs along the heat shield plate 31, the second circuit having the control circuit unit 7 is provided. The room 34 is no longer heated, and it was about 70 ° C in the conventional sealed state.
The temperature of 4 reached about 25 ° C.

Further, the outer side of the second air passage 10 is covered with the heat insulating case 9 via the heat insulating material 14, the metal fixing band 25 is attached to the upper part of the heat insulating case 9, and the end portion of the fixing band 25 is fixed. Fan casing 2 that covers the blower fan 6
It is configured such that it is attached and fixed to No. 1 with a screw 26 as a fixing means. Therefore, the heat insulating case 9 having the second air blowing passage 10 is fixed in the warm air blower body 1, and the heat generated by the heat insulating case 9 is transferred to the fan casing 21 via the metal fixing band 25. Since the fan casing 21 is cooled by the blower fan 6, radiant heat generated by the heat insulating case 9 is further reduced.

Furthermore, the heat storage device 11 comprises a pair of rectangular parallelepiped heat storage bodies 12 each having a heater storage groove 12a on the opposite side surfaces, and a heat storage heater 13 sandwiched between the pair of heat storage bodies 12. Band positioning grooves 37 are provided on the upper and lower surfaces of the central portion of each heat storage body 12 and on the side surface that does not have the heater housing groove 12a, and the band positioning grooves 37 of the pair of heat storage bodies 12 sandwiching the heat storage heater 13 are made of metal. The pair of heat accumulating bodies 12 are integrally combined by fitting the positioning band 38 and fixing the positioning band 38 with the screw 39 and the bolt 40 which are tightening means. Therefore, the metal positioning band 38 positions the pair of heat storage bodies 12 by the screws 39 and the bolts 40 and integrally combines them, and the positioning band 38 is exposed to the second air passage 10 and radiates heat. , Improve the heat dissipation efficiency of the heat storage device 11.

[0040]

As described above, according to the present invention, since the inflow port and the outflow port of the second air passage are formed so that their diameters gradually increase toward the ends, they are used in the case of rapid heating. Due to the rotation of the blower fan, the air outside the main body of the warm air blower is sucked into the first blower passage from the intake port, and the air is blown into the first blower passage.
The air is blown to the side where the warm air heater is placed through
It becomes easy for a part of the air flowing in the first air passage to enter when it flows into the second air passage from the inflow port portion, and the air that has entered the second air passage becomes the second air passage. The effect is that the air can be easily discharged from the outlet of the second blower, a sufficient amount of warm air can be secured, and the air can be blown from the outlet of the second blower passage.

Further, a passage of a predetermined length is provided in the first air passage from the position directly below the tip end to the upstream side when the opening / closing plate of the damper mechanism for opening / closing the inlet of the second air passage is opened. Since the passage narrowing plate is provided to narrow the air passage from the lower side thereof, the inflow air to the warm air heater defined by the tip of the opening / closing plate of the damper mechanism in the first air passage and the lower portion of the air passage. The cross-sectional area of the passage is reduced by making it narrower than the lower side of the passage by the passage constriction plate, and the cross-sectional area of the air passage at the inlet of the second air passage is relatively increased to facilitate the entry of air. By providing the passage narrowing plate, a pressure loss occurs due to the stepwise abrupt increase in the sectional area on the downstream side of the passage narrowing plate in the inflow air passage to the warm air heater, and air is introduced into the first blower passage. Difficult to enter That is, as a result, a part of the air flowing in the first air passage is more likely to enter when it flows into the second air passage from the inlet portion, and a sufficient amount of warm air is ensured. Have an effect.

Further, a control circuit section is provided in the upper part of the warm air machine main body, and a heat shield plate for shielding the control circuit section from the heat storage device is provided in the upper part of the warm air machine body, and the heat shield board is provided in the warm air machine body. A first room having a heat storage device partitioned by a heat plate is provided with a first exhaust port for releasing the heat inside thereof to the outside, and a control circuit section partitioned by the heat shield plate in the main body of the warm air blower. Since the second exhaust port that releases the heat inside the room to the outside is provided in the room No. 2, the heat generated from the outer surface of the heat insulating case that covers the heat storage device during heat storage of the heat storage device is shielded by the heat shield plate and controlled. Since it does not reach the circuit portion, the control circuit portion is not heated, and there is an effect that the service life of the control circuit portion is extended by not being affected by heat.

Further, the heat shielded by the heat shield plate and stored in the first room having the heat storage device is naturally discharged from the first exhaust port which releases the heat inside the first room provided in the first room to the outside. Since it is escaped to the outside by convection, the first room having the heat storage device is not heated, and further, the second room having the control circuit section partitioned by the heat shield plate,
Although some heat is trapped by being heated by the heat shield plate or by the heat generated by the control circuit itself, it is naturally discharged from the second exhaust port in the second room, which allows the heat inside to escape to the outside. Since it is escaped to the outside by convection, there is an effect that the second room having the control circuit section is not heated.

Further, a control circuit section is provided in the upper part of the warm air fan main body, and a heat shield plate for shielding the control circuit part from the heat storage device is provided in the upper part of the warm air fan main body. A room having a heat storage device partitioned by a heat shield plate is provided with an exhaust port for releasing the heat inside thereof to the outside, and a metal fixing band is attached to the upper part of a heat insulating case having a second air blowing passage inside, Since the end portion of the fixing band is attached and fixed to the fan casing that covers the blower fan by the fixing means, the heat insulating case having the second air blowing passage inside is fixed in the main body of the warm air blower, The heat generated by the case is transferred to the fan casing through the metal fixing band, and the fan casing is cooled by the blower fan, so the radiant heat generated by the heat insulating case is further reduced. It has the effect of say.

Furthermore, the heat storage device comprises a pair of rectangular parallelepiped heat storage bodies each having a heater housing groove on the opposite side surfaces, and a heat storage heater sandwiched between the pair of heat storage bodies. Band positioning grooves are provided on the upper and lower surfaces of the section and on the side surface that does not have a heater accommodating groove, and a metal positioning band is fitted into the band positioning grooves of a pair of heat storage bodies sandwiching the heat storage heater to perform the positioning. Since the pair of heat storage bodies are integrally combined by fastening the band with the fastening means, the metal positioning band positions the pair of heat storage bodies with the fastening means and combines them together. Since the positioning band is exposed to the second air passage and radiates heat, it has an effect of improving the heat radiation efficiency of the heat storage device.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of an electric warmer according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a branch portion of a first air passage of the electric warmer.

FIG. 3 is a perspective view showing an appearance of a heat storage device of the electric warmer.

FIG. 4 is a perspective view showing a heat storage body of a heat storage device of the electric warmer.

FIG. 5 is a cross-sectional view showing a configuration of a conventional electric warmer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 hot-air machine main body, 2 air inlets, 3 air outlets, 4 first ventilation passages, 5 ventilation motors, 6 ventilation fans, 8 warm air heaters, 10 2nd ventilation passages, 11 heat storage devices, 15
Inlet part, 16 outlet part, 17 damper mechanism.

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-7-146008 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24H 7/02

Claims (5)

(57) [Claims] 1. A blower outlet provided in a box-shaped warm air blower main body, a first blower passage provided in the warmer blower main body and communicating with the blower outlet, and the first blower blow passage. A blower fan that blows air toward the outlet, a warm air heater provided in the middle of the first blow passage, an inlet part connected in the middle of the first blow passage, and A second air passage having an outlet connected to the inside of the air outlet and communicating with the first air passage; a heat storage device provided in the middle of the second air passage; In an electric warmer provided with a damper mechanism that opens and closes an inlet, the inlet and outlet of the second blower duct are formed so that their diameters gradually increase toward the ends. A characteristic electric warmer. 2. A predetermined distance from a position directly below the tip end portion to an upstream side thereof when the opening / closing plate of the damper mechanism for opening / closing the inlet portion of the second air blowing passage is opened in the first air blowing passage. The vacuum cleaner according to claim 1, further comprising a road narrowing plate that narrows the passage by a length from a downstream side thereof. 3. A control circuit section is provided in an upper portion of the main body of the warm air blower.
A heat shield plate for shielding the control circuit unit from the heat storage device on the upper side of the warm air blower main body, and the heat storage device partitioned by the heat shield plate in the warm air blower main body; A first exhaust port for releasing heat inside the room is provided in the room, and the heat inside the room is provided outside in the second room having the control circuit section partitioned by the heat shield plate in the main body of the hot air blower. claims, characterized in that a second outlet for releasing
The electric air blower according to Item 1 or 2 . 4. A control circuit section is provided in an upper portion of the main body of the warm air blower.
A heat shield that shields the control circuit unit from the heat storage device is provided on the upper side of the warm air blower main body, and the heat shield plate is partitioned in the warm air blower main body into the room having the heat storage device. An exhaust port for releasing the internal heat to the outside is provided, and a metal fixing band is attached to the upper part of the heat insulating case having the second air blowing passage inside, and the end of the fixing band covers the blower fan. The electric air blower according to claim 1 or 2, wherein the electric air blower is fixed to the fan casing by fixing means. 5. The heat storage device comprises a pair of rectangular parallelepiped heat storage bodies each having a heater storage groove on opposite side surfaces, and a heat storage heater sandwiched between the pair of heat storage bodies, and the center of each heat storage body. Band positioning grooves are provided on the upper and lower surfaces of the section and on the side surface that does not have a heater accommodating groove, and a metal positioning band is fitted into the band positioning grooves of a pair of heat storage bodies sandwiching the heat storage heater to perform the positioning. claim pair of regenerator by fastened a band fastening means is characterized by comprising combined integrally 1
The electric air blower according to any one of 1 to 4 .