JPS6112183B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat storage heater, in particular, to store heat in a heat storage body at night using late-night electricity, or to store heat in a heat storage body during the day using solar heat, when necessary, using a fan. This invention relates to an improvement in a heat storage heater that heats a room by forcibly dissipating heat.

FIG. 1 shows an example of a conventional heat storage heater that stores heat in a heat storage body at night using, for example, late-night electricity.

In Fig. 1, a heat storage body 1 is made of magnesia or the like, and a heat generating body 2 generates heat when electricity is supplied late at night.
Built-in. The heat storage body 1 has its outer periphery covered with a heat insulating material 3 such as glass wool or asbestos, and is housed in an envelope 4 made of a steel plate or the like. A large number of ventilation passages 5 for heat exchange pass through this heat storage body 1, and communicate with an intake chamber 7 and an exhaust chamber 8, which are partitioned and formed at the bottom of the envelope 4 by a partition plate 6. Further, a fan 9 for forced circulation of air is arranged at the bottom of the envelope 4. Now, when the fan 9 is rotated, the air sucked in through the intake port 10 is sent into the ventilation path 5 in the heat storage body 1 and is exhausted through the exhaust port 11. At this time, when the air passes through the ventilation passage 5,
Since the heat stored in the heat storage body 1 is received, warm air is sent into the room, and the room is heated. When heat is stored in the heat storage body 1, it is carried out, for example, by supplying late-night power to the heat generating body 2 to generate heat at night. During this heat storage, the fan 9 is stopped.

In such conventional heat storage heaters, a heat insulating material is provided between the heat storage body and the envelope in order to prevent the heat stored in the heat storage body from being released to the outside of the envelope. To increase this, it is necessary to thicken the insulation material. Furthermore, in order to increase the heat transfer area of the heat storage body, it is necessary to enlarge the ventilation passage, and both of these become obstacles to downsizing the heater body.

In addition, when the fan is stopped to store heat, heat is dissipated from the intake or exhaust port due to natural convection within the ventilation path, so it is necessary to install the intake and exhaust ports below the ventilation path. Design freedom is limited. Further, when the intake port and the exhaust port are provided above the ventilation path, it is necessary to provide a damper at the intake port and the exhaust port, which complicates the structure.

In view of the above points, the present invention eliminates the need for separately disposing a heat insulating material between the heat storage body and the envelope, and provides a compact and flexible heat storage system that does not generate natural convection in the ventilation duct during heat storage. The purpose is to provide heaters.

In the heat storage heater of the present invention, a heat storage body is embedded in a porous metal provided in an envelope, and when the fan is rotating, the porous metal acts as a ventilation passage having a fan effect, and when the fan is stopped, It is characterized by acting as a heat insulating material that prevents natural convection.

Hereinafter, one embodiment of the heat storage heater of the present invention will be described based on FIGS. 2 and 3. Note that in FIGS. 2 and 3, the same reference numerals as in FIG. 1 indicate the same or corresponding parts.

The heat storage body 1 containing the heating element 2 is made of magnesia or the like, and is placed in a metal container 12 having good thermal conductivity such as aluminum. On the outer periphery of this thermally conductive container 12, a porous metal 13 such as a sintered metal made of the same metal or a metal of the same quality as the container 12 is provided.
is welded. This porous metal 13 has continuous fine pores 14 with a diameter of about 1 mm, and enables forced ventilation by a fan.
When there is no forced ventilation, natural convection is prevented from occurring within the porous metal 13. porous metal 13
A minute gap 15 is formed between the housing 4 and the envelope 4, as shown in FIG. This minute gap 15 is
This is to prevent heat from the heat storage body 1 from directly transmitting to the envelope 4 through the porous metal 13.

In FIG. 5, shielding members 16 are provided at appropriate intervals in the minute gap 15 in FIG. 4 in a direction perpendicular to the air flow direction. As a result, the minute gap 1
The heat exchange performance is improved by preventing air from blowing through the five sections. Note that if this shielding member 16 is made of a material with low thermal conductivity, direct transmission of heat from the porous metal 13 to the envelope 4 can be prevented. In FIG. 6, a shielding member 16 is provided in the minute gap 15, and a convection prevention plate 17 is provided in the porous metal 13 in a direction parallel to the air flow. As a result, even if the size of the continuous pores 14 in the porous metal 13 is increased somewhat to reduce ventilation resistance, natural convection within the porous metal 13 is prevented when the fan is stopped, improving heat storage performance. can do. This convection prevention plate 17 is made of the same metal or the same metal as the porous metal 13.
The porous metal 13 is welded together when manufacturing the porous metal 13.
This is done so as not to impair the thermal conductivity between the convection prevention plate 17 and the convection prevention plate 17.

In FIG. 7, a three-dimensional mesh metal having continuous pores 14 is welded to the outer periphery of a thermally conductive container 12 as a porous metal 13. This three-dimensional network porous metal 13 is made using a three-dimensional network resin model.
A mold material is filled into the gap in the resin model, and the resin model disappears by heating to form mold pores. Next, the mold cavity is filled with molten metal of the same quality as the thermally conductive container 12 by a vacuum operation or the like, and after solidification, the mold is removed.

With such a structure, the surface area of the metal that acts as a fin increases compared to the sintered metal, and the fin effect can be increased.

FIGS. 8 and 9 show the embodiments shown in FIGS. 2 and 3 in which the intake port, exhaust port, and fan are placed in the upper part or middle part of the envelope. Even if you do this, the porous metal 1
Due to the natural convection suppression effect in 3, Fig.
Similar to the embodiment shown in FIG. 3, the intake port 10 and the exhaust port 1
The heat stored in the air outlet 1 does not escape, and there is no need to separately install a damper or the like at the intake port 10 and the exhaust port 11.

10 to 12 show other embodiments of the heat storage heater of the present invention, and the same reference numerals as in FIGS. 2 and 3 indicate the same or corresponding parts.

In the embodiment shown in FIGS. 10 to 12, the porous metal 13 disposed inside the envelope 4 forms a minute gap 15 with the inner wall of the envelope 4, and the The upper porous metal 13 is separated by the partition plate 18.
a and a lower porous metal 13b.
A thermally conductive container 12 loaded with a heat storage body 1 is embedded in each of the divided porous metals 13a and 13b. Further, at one end side of the envelope 4, a ventilation passage 20 is formed through a sealing member 19 to communicate the upper porous metal 13a and the lower porous metal 13b. A fan 9 is provided. In this example, the minute gap 1
5, by providing a shielding member 16 as shown in FIG. 5, it is possible to prevent air from blowing through and improve heat exchange performance. Furthermore, if a convection prevention plate 17 as shown in FIG. 6 is provided, even if the size of the pores in the porous metal 13 is increased somewhat to reduce the ventilation resistance, the inside of the porous metal 13 when the fan is stopped. can prevent natural convection and improve heat storage performance. Further, in this embodiment, a cross-flow fan is used as the fan 9, and a pair of front casing 21a and rear casing 21b, which change the direction of air flow, are rotatably provided around the cross-flow fan. FIG. 12 shows an example of a mounting structure for the front casing 21a and the rear casing 21b.

Side plates 22 and 23 are rotatably supported on the rotating shaft 9a of the fan 9, and a front casing 21a and a back casing 21b are fixed to the side plates 22 and 23 so as to face each other. Therefore, when the side plates 22 and 23 rotate, the front casing 21a and the rear casing 21b rotate together. When the front casing 21a and the rear casing 21b are rotated 180 degrees from the state shown in FIG.
The air is sucked into the room and discharged into the room through the air intake port 10. Reference numerals 24 and 25 denote louvers provided at the intake port 10 and the exhaust port 11, and by adjusting the angle, the intake direction and the exhaust direction can be arbitrarily selected, and the exhaust air volume can also be controlled.

In the heat storage heater configured in this way, when storing heat in the heat storage body 1, the fan 9 is stopped and power is supplied to the heat generating body 2, for example, late at night. During this heat storage, the louvers 24 and 25 are kept fully closed to prevent outside air from flowing into the envelope 4 as much as possible. Next, when heating the room by dissipating the heat stored in the heat storage body 1 into the room, open the louvers 24 and 25 provided at the intake port 10 and the exhaust port 11,
Rotate fan 9. As the fan 9 rotates, indoor air flows in through the intake port 10 and passes through the upper porous metal 13a, where it receives the heat stored in the heat storage body 1 due to the fan effect of the porous metal 13. . The air that has received the stored heat passes through the ventilation path 20 and inside the lower porous metal 13b, where it receives the heat stored in the heat storage body 1 again due to the fan effect of the porous metal 13. The temperature further rises, and the air returns to the room through the exhaust port 11, heating the room. During this heating operation, the front casing 21a and the rear casing 2 provided around the fan 9
When 1b is rotated 180 degrees from the state shown in Figure 10,
Indoor air is sucked in through the lower exhaust port 11, receives the heat stored in the heat storage body 1, and then is returned into the room through the upper air intake port 10. Therefore, by adjusting the positions of the front casing 21a and rear casing 21b and the angles of the louvers 24 and 25, the exhaust position, exhaust direction, and exhaust volume of the airflow can be freely selected to suit the indoor environment, thereby improving indoor comfort. can be secured.

In the embodiments shown in FIGS. 10 to 12, a once-through fan is used as the fan 9, but a Sirotskov fan or an axial fan may be used instead of the once-through fan.

In addition, in the embodiments so far, the heat storage body 1
Although a case has been described in which a solid such as magnesia is used, if the thermally conductive container 12 is a closed container, a liquid such as water or a latent heat storage material such as an inorganic hydrated salt may be used.

In the embodiment shown in FIGS. 10 to 12, a passageway 20 is provided in the envelope 4, and a fan 9 is disposed in this ventilation passageway 20. This is to reduce noise, and if the device is used in an environment where noise is not a major problem, a structure may be adopted in which the portion including the porous metal 13 and the ventilation path portion in which the fan is provided are separated. With such a structure, maintenance of the fan becomes easy.

As explained above, the present invention interposes a porous metal that has a fan effect and is difficult to generate natural convection between the heat storage body and the envelope, and uses this porous metal as a heat insulator when the fan is stopped. During forced ventilation by a fan, it acts as a ventilation path with a fan effect, eliminating the need for thick insulation to prevent the heat stored in the heat storage body from being released to the outside, and making the heat storage heater more compact. can be converted into Furthermore, since heat does not flow out from the intake port or the exhaust port, the placement positions of the intake port or the exhaust port can be freely selected.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view illustrating an example of a conventional regenerative heater, FIG. 2 is a sectional side view illustrating an embodiment of the regenerative heater of the present invention, and FIG. 3 is an A--
4 is a partially enlarged view showing an example of the porous metal and envelope portion in FIGS. 2 and 3, and FIGS. 5 to 7 are also shown in FIGS. 2 and 3. FIGS. 8 and 9 are partially enlarged views showing other examples of the porous metal and the envelope portion in FIGS. 2 and 3; FIGS. 11 is a sectional side view illustrating another embodiment of the heat storage heater of the present invention, FIG. 11 is a sectional view taken along the line B-B in FIG. 10, and FIG. 12 is a cross-sectional view of the once-through fan in FIGS. FIG. 3 is a front view of the front casing and rear casing portions. 1... heat storage body, 2... heating element, 4... envelope,
6... Partition plate, 9... Fan, 10... Intake port,
11...Exhaust port, 12...Thermal conductive container, 13...
... Porous metal, 15 ... Micro gap, 16 ... Shielding member, 17 ... Convection prevention plate, 18 ... Partition plate, 2
0...Ventilation passage, 21a...Front casing, 21
b...Back casing.

Claims (1)

[Scope of Claims] 1. A heat storage heater that heats a room by providing a heat storage body in the heat storage body and forcibly dissipating the heat stored in the heat storage body using a fan. A porous metal is placed between the inner wall of the envelope and the fan, which acts as a ventilation passage with a fan effect when air is being forced into the fan, and as a heat insulator when the fan is stopped. A heat storage heater characterized in that the porous metal is disposed to form a minute gap, and a heat storage body containing a heating element and loaded in a thermally conductive container is embedded in the porous metal. 2. The heat storage heater according to claim 1, characterized in that a shielding member is provided in the minute gap in a direction that opposes the flow of air. 3. The regenerative heater according to claim 1 or 2, characterized in that a thermally conductive convection prevention plate parallel to the air flow direction is provided within the porous metal. 4. In a heat storage heater that heats the room by providing a heat storage body within the envelope and forcibly dissipating the heat stored in the heat storage body using a fan, The porous metal acts as a ventilation passage with a fan effect when air is being forced into it, and acts as a heat insulator when the fan is stopped, so that a minute gap is formed between it and the inner wall of the envelope. At the same time, this porous metal was divided into two by a partition plate parallel to the direction of air flow, and a heating element was built in each divided porous metal and loaded into a thermally conductive container. A heat storage heater characterized in that a heat storage body is buried, a ventilation path is provided that communicates each divided porous metal, and a fan is disposed in the ventilation path. 5. The heat storage heater according to claim 4, characterized in that a shielding member is provided in the minute gap in a direction that opposes the flow of air. 6. The regenerative heater according to claim 4 or 5, characterized in that a thermally conductive convection prevention plate parallel to the air flow direction is provided within the porous metal. 7. According to any one of claims 4 to 6, a once-through fan is used as the fan, and a front casing and a back casing are integrally and rotatably provided on the outer periphery of the once-through fan. Thermal storage heater.