JPH0514111Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to electrical hot air using a solid heat storage body.

[Prior Art] There is a type of heat storage electric hot air that uses a solid heat storage body, which has the advantage that the space for the heat storage body is small and it can be easily miniaturized.

A heat storage type electric hot air system using a solid heat storage body is equipped with a solid heat storage body and an electric heater for heating the solid heat storage body inside the case, and also communicates with the air intake port and air outlet of the case to blow the air. It has a configuration in which an air passage is provided to flow in contact with the solid heat storage body, and a blower is further provided at the air intake port of the case.

This electric hot air then heats the solid heat storage body and stores heat by energizing the electric heater to generate heat using late-night electricity at night. To obtain warm air after completing heat storage, drive the blower to take in outside air from the air intake port of the case.
While circulating this air through the air passage, it is brought into contact with a solid contact body, is heated by the heat released from the solid heat storage body, and is blown out as warm air from the air outlet of the case.

However, in the conventional heat storage type electric hot air,
While the solid heat storage body is being heated by an electric heater to store heat, the space between the air intake port of the case and the air passage is closed to prevent outside air from entering the air passage from the air intake port. There is no means to do so.

This is because external air enters the air passage from the air intake port during heat storage, is heated by the solid heat storage body, and flows out from the air outlet, which is considered as part of the heating heat amount.

[Problems to be solved by the invention] However, recently, the development of a heat storage electric hot air system that uses a solid heat storage body to generate hot air at a temperature of 100°C or higher is being considered. This electric hot air has a high heat storage temperature in the solid heat storage body, and even if there is a slight difference in temperature between the air intake port and the air outlet of the case, air convection occurs inside the air passage. For this reason, when outside air, that is, cold air, enters the inside of the air passage, a large proportion of the intruding air is heated by convection and flows out from the air outlet, which increases the heat radiation loss of the solid heat storage body, causing the electric heater to There was a problem that the heat storage efficiency with respect to the solid heat storage body decreased.

This invention was made based on the above circumstances,
It is an object of the present invention to provide electrical hot air that can efficiently store heat in a solid heat storage body without being inhibited by external air.

[Means and effects for solving the problems] The electric hot air fan of the present invention includes a case, an air intake provided in the case for introducing air from the outside of the case into the inside of the case, and an air intake provided in the case and provided in the case. an air outlet that blows air from the inside to the outside; a solid heat storage body provided inside the case; an electric heater that heats the solid heat storage body; a passage formed between the air intake and the air intake; a blower that causes air to flow from the air intake to the passage; a valve that closes with respect to the inlet, and the passage includes a first passage part through which the air taken in from the air intake port flows in contact with the surface of the solid heat storage body; and the first passage part. and the air outlet, and converts the flow of air exiting from the first passage into a direction opposite to the direction of the air flow when exiting from the first passage. It is characterized by having a second passage part having a second passage part. That is, the valve and the guide passage can prevent external air from entering the air passage while the solid heat storage body is storing heat.

[Examples] Examples of the present invention will be described below with reference to drawings.

The drawing shows an embodiment of the electric hot air fan of the present invention.

In the figure, reference numeral 1 denotes a case made of a heat insulating material, and an air intake port 2 is provided at the bottom of this case 1, and an air outlet 3 is provided at the top. A plurality of solid heat storage bodies 4 are stacked inside the case 1, and the periphery of the stacked solid heat storage bodies 4 except for the lower part is surrounded by the case 1.
It is surrounded by an insulating material that makes up the An electric heater 5 is inserted inside each of these solid heat storage bodies 4, respectively. An air passage 6 is formed passing through the inside of each of the stacked solid heat storage bodies 1 in an inverted U shape, and this air passage 6 contacts the solid heat storage body 4 to allow air to flow therethrough. Note that this air passage 6 is a first passage section. Inside the case 1, a guide plate 7 is provided below the solid heat storage body 4, and this guide plate 7 opens a guide passage 8 that connects the air intake port 2 and the lower end opening of one of the air passages 6, that is, the inlet 6a. is formed. Also, inside the case 1 due to the guide plate 7,
A guide passage 9 is formed that connects the other lower end opening, ie, the outlet 6b, of the solid heat storage body 4 and the air outlet 3. This guide passage 9 is an outlet 6a of the air passage 6.
A portion 9a communicating with the air passage 6 is located perpendicularly to the air passage 6, and a portion 9b communicating with the air outlet 3 stands upright from the portion 9a in a direction parallel to the air passage 6.

That is, the guide passage 9 has a bent portion that changes the flow of air exiting from the air passage 6 into a direction opposite to the direction of the air flow when exiting from the air passage 6. Note that this guide passage 9 is a second passage section.

A blower 10 is installed in the air intake port 2 of the case 1. Further, the guide passage 8 connecting the air intake port 2 and the entrance 6a of the air passage 6 is provided with a valve 11 for opening and closing this passage, and this valve 11 uses, for example, a rotary damper. It is rotated by a control device (not shown) to perform opening and closing operations. When the electric heater 5 is heating the solid heat storage body 4 to store heat, the valve control device performs a closing operation to completely close the guide passage 8. In addition, also when obtaining hot air using the heat radiation of the solid heat storage body 4, the valve 11 is opened and closed as necessary by the valve control device.

In addition, 12 in the figure is a detour passage, which is case 1.
This air passage bypasses the air passage 6 and connects the air intake port 2 to the air outlet 3. 13 is a valve that opens and closes this detour passage 12.

Therefore, in the electric hot air constructed as described above, heat storage in the solid heat storage body 4 is performed as follows. At night, late-night power is used to energize the electric heater 5 to generate heat, which heats the solid heat storage body 4 to store heat. During this heat storage, the valve control device closes the valve 11 to completely close the guide passage 8. Therefore, case 1
External air is blocked by a valve 11 and is prevented from entering the air passage 6 through the guide passage 8,
In addition, the air inside the air passage 6 is also prevented from flowing out of the case 1 through the guide passage 8. In addition, the air outlet 3 and the air passage 6 of the case 1
The guide passage 9 that connects the outlet 6 of the outlet 6 with the outlet 6b consists of a part 9a perpendicular to the air passage 6 and a part 9b parallel to the air passage 6, and each part 9a, 9b of the guide passage 9 and the air passage 6 are combined to form a U-shaped passage. In other words, the passage has a configuration that makes it difficult for air to circulate. Therefore, air outside the case 1 can be prevented from entering the air passage 6 through the guide passage 9, and air within the air passage 4 can be prevented from flowing out to the outside. Therefore, since cold air from outside does not enter into the air passage 6 and air convection does not occur inside the air passage 6, heated air does not flow out from the air passage 6 and a large heat radiation loss does not occur. . This allows the solid heat storage body 4 to be efficiently heated and stored, and is particularly suitable for storing heat in the solid heat storage body 4 at a high temperature.

After the heat storage is finished, the valve control device opens the valve 11 to open the guide passage 8. To obtain hot air, rotate the blower 10 to
External air is taken in from the air intake port 2 of the , this air is passed through the guide passage 8 to the air passage 6, heated by the heat dissipation of the solid heat storage body 4, and the heated air is further passed through the guide passage 9 to the air blower. The hot air is blown out from the outlet 3 to the outside. Further, the opening degrees of the valves 11 and 13 are changed according to changes in the temperature of the solid heat storage body 4,
By adjusting the volume of air flowing through the air passage 6 and the detour passage 12, the air whose temperature has increased after flowing through the air passage 6 and the detour passage 12 at the air outlet 3 can be adjusted.
The temperature of the hot air is controlled by mixing it with the flowing heated air.

Note that the valve 11 that closes the guide passage 8 during heat storage in the solid heat storage body 4 is not limited to a rotary damper;
It may also be in other formats. Further, the valve 11 has both the function of closing the guide passage 11 when heat is being stored in the solid heat storage body 4, and the function of adjusting the amount of air flowing through the air passage 6 when hot air is being blown out. However, valves may be provided for each function.

[Effects of the invention] As explained above, according to the electric hot air of the present invention, when storing heat in a solid heat storage body, intrusion of external air is prevented, an increase in heat radiation loss is suppressed, and heat storage is efficiently performed. I can do it.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of the electric hot air according to the present invention. 1... Case, 2... Air intake port, 3... Air outlet, 4... Solid heat storage body, 6... Air passage,
8, 9...Guidance passage, 10...Blower, 11...
Valve, 13... Valve.

Claims (1)

[Scope of utility model registration request] a case; an air intake provided in the case to take in air from the outside of the case to the inside; an air outlet provided in the case to blow air from the inside of the case to the outside; a solid heat storage body, an electric heater that heats the solid heat storage body, a passageway through which air flows formed between the air intake port and the air outlet in the interior of the case, and the air intake port. and a valve that closes the passageway to the air intake port when the electric heater is heating the fixed heat storage body, and the passageway a first passage portion through which the air taken in from the inlet is brought into contact with the surface of the solid heat storage body; and a first passage portion located between the first passage portion and the air blowing outlet and the air flowing out from the first passage portion. An electric hot air machine characterized by having a second passage part having a bending part that changes the flow of air in a direction opposite to the direction of the flow of air when it exits from the first passage part. .