JPH05256519A - Heating device - Google Patents

Abstract

PURPOSE:To provide a highly safe heating device which stops energization through detection of abnormality regardless of a mode of radiant heating and a hot air heating during the occurrence of abnormality where the front of a body is closed, in a heating device wherein a heater for radiant heating and a heater for hot air heating are contained in one case. CONSTITUTION:A heating device is provided with an air suction port 8 formed in the rear of a case 7, a hot air discharge port 10 formed in the front thereof, an opening part 9 through which a radiant heat from a heater 17 for radiant heating is radiated, a blower 13 arranged to the inner upper part of the case 7, a heater 15 for hot air heating situated downward from the blower, and a heater 17 for radiant heating arranged in the opening part 9. A discharge air passage 11 having a through-hole 19 through which the hot air discharge port 10 is communicated to the opening part 9, and a temperature excessive increase preventing device 20 located in the vicinity of the through-hole 19 are provided. Thus, during the occurrence of abnormality where a front is closed, the excessive increase preventing device 20 detects an abnormal temperature increase through the through-hole 19 and stops operation regardless of a hot air heating and a radiant heating mode.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Heretofore, an electric heating device of this type has generally been constructed as shown in Japanese Patent Laid-Open No. 60-60454. The configuration will be described below with reference to FIG. In the figure, 1 is the main body of the electric heating device,
A blower 2 and a heater 3 for warm air heating are provided in the main body 1,
It has an air intake port 4 and a warm air outlet port 5. A radiant heating heater 6 is provided on the front surface of the main body 1.

In the warm air heating function of the electric heating device in the above-described conventional structure, the air flowing into the main body 1 through the air suction port 4 is pressurized by the blower 2 and further heated by the warm air heating heater 3. It is blown into the room from the hot air outlet 5. Further, in the radiant heating function, the radiant heating heater 6 generates heat and radiates heat to the front surface. The warm air heating function portion and the radiant heating function portion are provided completely independently by partition walls.

[0004]

In the electric heating device having such a conventional structure, the power supply is stopped in an abnormal state such that the lower part of the front surface of the main body 1 having the hot air outlet 5 is closed. In this case, a device for preventing excessive temperature rise for warm air heating (not shown) is provided near the warm air outlet 5.
Since the heater 3 for warm air heating and the heater 6 for radiant heating are independently shielded from each other, when the operating state is radiant heating, the overheat prevention device for warm air does not raise the internal temperature. It could not be detected, and abnormal temperature rise around the lower part of the radiant heating heater 6 and the blockage could not be prevented. That is, when the operating state is radiant heating, it is necessary to provide a radiant heating overheat prevention device (not shown) near the lower part of the radiant heating heater 6 as well, in order to guarantee safety regardless of the operating state. Had to provide a large number of overheat prevention devices, complicating the control circuit.

The present invention solves the above problems and is a safety system that can stop energization when the temperature is abnormal regardless of the operating states of the radiant heating and the hot air heating without increasing the overheat prevention device and the like. The purpose is to provide a highly efficient heating system.

[0006]

In order to achieve the above-mentioned object, the present invention has an air inlet on the rear surface of the case, an opening on the upper side of the case front and a hot air outlet on the lower side, and the inside of the case has An air blowing path that connects the air suction port and the warm air outlet is provided, and a blower and a heater for warm air heating downstream of the blower are provided above the blow air passage.
Further, a radiant heating heater is provided between the blow-out air passage and the opening on the front surface of the case, and a through-hole communicating with the opening on the front surface of the case is provided in the blow-out air passage, the through-hole and the heater for radiant heating. An overheat prevention device is installed between the two.

[0007]

With the above-described structure, the heating apparatus of the present invention has the heater portion for warm air heating and the heater portion for radiant heating that are communicated with each other through the same through hole, and an overheat prevention device is provided near the through hole. Therefore, in the event of an abnormality such as the front of the main unit being blocked, when the operating condition is warm air heating, the heated air that has settled in the blowing air passage rises through the through hole and the overheat prevention device is installed. Activate. When the operating state is radiant heating, the overheat prevention device is operated by the heated air that has settled under the radiant heating heater.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an internal configuration of an electric heating apparatus according to an embodiment of the present invention, and FIG. 4 is an external view of the embodiment. In FIGS. 1 and 4, reference numeral 7 denotes a case, which is provided with an air suction port 8 on the rear surface of the case, an opening 9 on the upper part of the front surface of the case, and a hot air outlet 10 on the lower part of the front surface of the case. An L-shaped blow-out air passage 11 that connects the air intake 8 and the warm air outlet 10 is provided in the case 7, and a blower 13 is provided in a vertical portion 12 of the blow-out air passage 11.
Is attached with the rotating shaft 14 being horizontal. Blower 13
A heater 15 for warm air heating is horizontally provided downstream of the. A front guard 16 is provided in the opening 9, and a radiant heating heater 17 having an area smaller than that of the opening 9 is provided between the front guard 16 and the blower 13. A through hole 19 communicating with the opening 9 is provided in the horizontal portion 18 of the blowout air passage, a first overheat prevention device 20 is provided between the through hole 19 and the heater 17 for radiant heating, and the upper portion of the opening 9 is provided. Is provided with a second overheat prevention device 21. An electric circuit as shown in FIG. 5 is formed on the upper part of the case 7 so that only the hot air heater 15 is energized, only the radiant heater 17 is energized, and both the hot air heater 15 and the radiant heater 17 are energized. An operation control device 24 that can select an operation mode by energization is provided.

The operation of the above configuration will be described. At the time of warm air heating, the air sucked from the air suction port 8 passes through the case 7 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 11, and is blown into the room from the warm air blowing port 10. At this time, the temperature of the first excessive temperature rise prevention device 20 is kept low because it is outside the hot air passage.

On the other hand, during radiant heating, the radiant heating heater 1
7 generates heat and radiates from the opening 10 to the front through the front guard 16. At this time, the hot air generated by the heater 17 for radiant heating flows by natural convection from the through hole 19 to the upper convection opening 23 through the suction port 22 and the warm air outlet 10 at the bottom of the opening 9, and from inside the case 7 to the case. 7 is discharged to the outside. At this time, the first overheat prevention device 20
The temperature is kept low because it is in the moving air path of natural convection air.

As shown in FIG. 2, when the warm air outlet on the front surface of the case 7 is closed during warm air heating, the air heated by the warm air heating heater 15 collects in the horizontal portion 18 of the blowing air passage. Further, the temperature rises through the through hole 19, and the first overheat prevention device 20 detects the temperature of the heated air and stops the energization.

Further, as shown in FIG. 3, when the front surface of the case 7 is closed during radiant heating, hot air generated by the radiant heating heater 17 accumulates in the lower portion of the opening 9 to cause a first temperature rise. The prevention device 20 detects the temperature and stops energization.
The second overheat prevention device 21 detects the temperature and stops the operation when only the upper part of the case 7 is blocked during radiant heating.

As described above, according to the electric heating apparatus of the embodiment of the present invention, the blowing air passage 11 through which the air heated by the warm air heating heater 15 flows and the opening 9 through which the radiant heating heater 17 radiates heat. Through the through hole 19,
The first overheat prevention device 2 is provided on the upper part near the through hole 19.
0 is set. And this first overheat prevention device 2
Since 0 is provided outside the hot air passage and inside the air intake passage of natural convection during radiant heating, the temperature of the first overheat prevention device 20 is low during normal operation regardless of the heating operation mode. .. When an abnormality occurs such that the front surface is blocked, the first overheat prevention device 20 can detect the rise in the internal temperature sensitively and stop the energization.

Furthermore, since the overheat prevention device 20 is provided near the mounting portion of the heater 15 for warm air heating, when the blower 13 is abnormal, the abnormal temperature rise of the heater 15 for warm air heating is detected. The energization can be stopped.

In this embodiment, electricity is used as the heat source of the heater, but other gas, petroleum, etc. can be used.

[0016]

As is apparent from the above embodiments, according to the present invention, the heater side for warm air heating and the heater side for radiant heating communicate with each other through a through hole, and an overheat prevention device is provided in the through hole portion. By providing it, the abnormal temperature rise prevention device can detect the rise of the internal temperature regardless of the heating mode at the time of abnormality such as the front surface being blocked, and one temperature rise prevention device can be used for both warm air heating and radiant heating. It is possible to provide a highly reliable electric heating device as a safety device.

[Brief description of drawings]

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

FIG. 2 is a vertical cross-sectional view when the lower part of the front surface of the main body is closed during warm air heating in the same embodiment.

FIG. 3 is a vertical cross-sectional view when the lower part of the front surface of the main body is closed during radiant heating of the same embodiment.

FIG. 4 is a front external perspective view of the heating device of the embodiment.

FIG. 5 is an electric circuit diagram of the embodiment.

FIG. 6 is a vertical cross-sectional view showing an internal configuration of a conventional electric heating device as seen from a side surface.

[Explanation of symbols]

 7 Case 8 Air Suction Port 9 Opening 10 Hot Air Blowout Port 11 Blowoff Air Path 13 Blower 15 Heater for Heating Hot Air 17 Heater for Radiant Heating 19 Through Hole 20 Overheat Prevention Device

Claims (1)

[Claims] 1. An air inlet on the rear surface of the case, an opening on the upper side of the case front and a warm air outlet on the lower side, and an air outlet for communicating the air inlet and the warm air outlet in the case. A blower is provided above the blow-out air passage, a warm air heater is provided downstream of the blower, and a radiant heating heater is provided between the blow-out air passage and the opening on the front surface of the case. In the heating device, a through hole communicating with the opening on the front surface of the case is provided, and an overheat prevention device is provided between the through hole and the radiant heating heater.