JPH0534013A - Electric space heating device - Google Patents

Abstract

PURPOSE:To provide an electric heating space device which enables reduction of the temperature of the peripheral part of an overheated heater for radiant heating in a short time during the abnormal increase of the temperature of the heater for radiant heating and improves safety, in a device provided with a heater for radiant heating and a heater for hot air heating. CONSTITUTION:A case 7 is provided with an opening air suction port 8, a hot air discharge port 10, and an opening part 9 through which the radiant heat of a heater 16 for radiant heating is radiated. A blower 13, a heater 15 for hot air heating, the heater 16 for radiant heating, a discharge air duct 11, and a thermal insulation plate 17 of which a part of an air duct is comprised are disposed in the case 7. This constitution reduces temperature in the case 7 in a short time through running of a blower 13 during the abnormal increase of the temperature of the periphery of a heater 16 part for radiant heating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heating device having a heater for warm air heating and a heater for radiant heating.

[0002]

2. Description of the Related Art A conventional electric heating device of this type is disclosed in Japanese Patent Laid-Open No.
The configuration as shown in Japanese Unexamined Patent Publication No. 0-60454 has been common. The configuration will be described below with reference to FIG.

In the figure, reference numeral 1 is a main body of an electric heating apparatus, in which a blower 2 and a heater 3 for warm air heating are arranged, and an outside air suction port 4 and a warm air blowing port 5 are provided. There is. A radiant heating heater 6 is provided on the front surface of the main body 1, and an operation control device 1a is provided on the upper portion of the main body 1.

In the warm air heating function of the electric heating device having the above structure, the air flowing into the main body 1 through the outside air intake port 4 is pressurized by the blower 2 and heated by the warm air heating heater 3 to blow out the warm air. It is blown out from the mouth 5. The radiant heating function heats the radiant heating heater 6 to radiate heat to the front surface.

[0005]

In such a conventional electric heating apparatus, when a blanket is hung on the front surface of the main body 1 during radiant heating to close it, the radiant heat of the radiant heating heater 6 causes the radiant heat inside the main body 1 to rise. When the temperature rises, energization is stopped by an overheat prevention device (not shown). However, it took time for the radiant heating heater 6 to cool, and it was not possible to prevent heat from concentrating on the upper portion of the main body 1 due to natural convection. That is, when the temperature of the radiant heating heater 6 is overheated, the upper part inside the main body 1 remains in a high temperature state for a long time even after the energization is stopped, and the operation control device (not shown) and the like on the upper part of the main body cannot be protected from heat. .

The present invention solves the above problems and provides a highly safe electric heating apparatus capable of lowering the temperature of the overheated radiant heating heater peripheral portion in a short time when the radiant heating heater is abnormal. With the goal.

[0007]

In order to achieve the above object, the present invention provides an outside air intake port on the rear surface of the case of an electric heating device, and the front surface of the case is provided with an opening at the top and a warm air outlet at the bottom. Provided in the case, a blow-out air passage that connects the external suction port and the warm-air blow-out port,
A blower is provided in the upper part of the blowing air passage, a heater for warm air heating is provided downstream of the blower, a radiant heating heater is provided between the blower and the opening, and a heater for radiant heating and the blower are provided. Is provided with a heat shield plate forming a part of the blowout air passage. Further, an operation control device for operating the blower for a certain period of time is provided in conjunction with the operation of the radiant heating heater overheat prevention device and the overheat prevention device.

[0008]

According to the electric heating apparatus of the present invention, since the heat shield plate of the heater for radiant heating forms a part of the blowing air passage with the above-mentioned configuration, the temperature overheat is prevented when the heater for radiant heating is abnormal. After the operation of the air conditioner, the operation control device operates the blower for a certain period of time to cool the radiant heating heater peripheral portion through the heat shield plate and cool the overheated temperature in a short time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3.

FIG. 1 is a longitudinal sectional view showing the internal structure of an electric warmer according to one embodiment of the present invention. In the figure, reference numeral 7 denotes a case, and an outside air suction port 8 is provided on the rear surface of the case, an opening 9 is provided at an upper portion of the front surface of the case, and a warm air outlet 10 is provided at a lower portion of the front surface of the case. In the case 7, an L-shaped blowing air passage 11 that connects the outside air suction opening 8 and the warm air blowing opening 10 is provided, and the vertical portion 1 of the blowing air passage 11 is provided.
A blower 13 is attached to 2 with a rotary shaft 14 thereof being horizontal. A warm air heater 15 is provided downstream of the blower 13. A radiant heating heater 16 having an area smaller than that of the opening 9 is provided between the opening 9 and the blower 13, and heat is shielded so as to cover the blowing air passage 11 between the radiant heating heater 16 and the blower 13. A plate 17 is provided to form the air passage 11. An operation control device 18 is provided on the upper surface of the case 7.

The operation of the above structure will be described. At the time of warm air heating, the air sucked from the outside air suction port 8 passes through the inside of the case 8 and enters the blower 13. The air pressurized by the blower 13 is heated by the warm air heating heater 15, passes through the blowing air passage 12, and is blown out from the warm air blowing outlet 11.

On the other hand, during radiant heating, as shown in FIG. 1, the radiant heating heater 16 generates heat and radiates heat from the opening 10 to the front surface. At this time, the hot air generated by radiating heat from the rear surface of the radiant heating heater 16 flows from the suction port 19 at the lower part of the opening 9 to the convection port 20 at the upper part by natural convection, and is discharged from the inside of the case 7 to the outside.

Further, as shown in FIG. 2, when the opening 9 is closed during radiant heating, hot air generated by the radiant heating heater 16 accumulates in the upper part of the case 7. At this time, the temperature overheat prevention device 21 detects the temperature, and the operation control device 18 stops the energization of the radiant heating heater 16, and at the same time, only the blower 13 is operated for a certain time, and the operation control device 18 and the heat shield plate 17 are operated. To cool the radiant heating heater 16 and its surroundings. As described above, according to the electric heating apparatus of the embodiment of the present invention, since the heat shield plate 17 of the radiant heating heater 16 forms the blowing air passage 11 part, when the radiant heating heater 16 part has an abnormal temperature rise. By operating the blower 13, the temperature of the radiant heating heater section can be effectively cooled in a short time. In the configuration of the above-described embodiment, the temperature of the operation control device 18 can be prevented from rising by always operating the blower 13 at a low speed by the operation control device 18 during radiant heating.

[0014]

As is apparent from the above embodiments, according to the present invention, the heat shield plate of the radiant heating heater forms a part of the blowing air passage, and when the radiant heating heater section has an abnormal temperature rise. After the operation of the temperature overheat protector, the operation control device operates the blower for a certain period of time, so that the radiant heating heater peripheral portion is cooled through the heat shield plate and the overheated ambient temperature is cooled in a short time.

[Brief description of drawings]

FIG. 1 is a sectional view of an electric heating apparatus according to an embodiment of the present invention during radiant heating.

FIG. 2 is a cross-sectional view when the opening of the electric heating device according to the embodiment of the present invention is closed.

FIG. 3 is an external perspective view of an electric heating device according to an embodiment of the present invention.

FIG. 4 is an electric circuit diagram of the device.

FIG. 5 is a sectional view showing an internal configuration of a conventional electric heating device.

[Explanation of symbols]

 7 Case 8 Outside Air Suction Port 9 Opening Port 10 Hot Air Blowout Port 11 Blowoff Air Path 13 Blower 15 Heater for Heating Hot Air 16 Heater for Radiant Heating 17 Heat Shield 18 Operation Control Device 21 Temperature Overheat Prevention Device

Claims (1)

Claim: What is claimed is: 1. An outside air suction port is provided on a rear surface of a case of a heating device, an opening is provided at an upper part of the front surface of the case, and a warm air outlet is provided at a lower part of the case. And a hot air outlet communicating with the hot air outlet, a blower and a heater for warm air heating downstream of the blower are provided above the blower air passage, and between the blower and the opening on the front of the case. A radiant heating heater is provided, and a heat shield plate that forms a part of the blowout air passage is provided between the radiant heating heater and the blower, and a temperature overheat prevention device for the radiant heating heater and its overheat prevention are provided. An electric heating device provided with an operation control device for operating the blower for a certain period of time in association with the operation of the device.