JPH0821656A - Heat accumulation type warm-air heater - Google Patents

Abstract

PURPOSE:To surely protect electronic parts in an operating unit by a method wherein a heat discharging guide is provided between a heat accumulating material and the operating unit, which are accommodated in the main body of a heater while an abnormal temperature sensor is provided in the operating unit. CONSTITUTION:A set temperature, set in a manufal operation panel 15, is compared with a room temperature by a power control unit under a condition that a heat accumulating heater 3 is excited and generated heat in the heater 3 is accumulated in a heat accumulating material 14. The conduction of electric power to the heat accumulating heater is controlled in accordance with a temperature difference obtained in the comparison and the rotation of a fan motor 12 is driven. Air, sent to the side of the heat accumulating heater 3, is heated in a warm-air passage 6 while receiving radiation heat from the heat accumulating tank 2 and is ventilated from a warm-air outlet port 8. In this case, heat, leaked out of a heat insulating material 5, is received by a waste heat guide plate 30 provided at the upper part of a casing 1 and is discharged through respective heat discharging ports 18. On the other hand, when an abnormal temperature sensor 31, provided on an operation base board 114, has detected an abnormal temperature, the operation of the heater is stopped to protect the electronic parts on the operation base board 14 from breakage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention stores heat in a heat storage material,
The present invention relates to a heat storage type hot-air heater that sends the heat stored in the heat storage material as hot air.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram of a heat storage type warm air heater. Inside the housing 1 which is the main body of the heater, the heat storage tank 2
Is arranged. The heat storage tank 2 has a heat storage heater 3 arranged at the center thereof, and a heat storage material 4 is covered around the heat storage heater 3.

This heat storage material 4 has a good electrical insulating property,
And a material having excellent thermal conductivity, such as MgO or Fe ₂ O
_3, Al ₂ O _3, is formed of an oxide particulate such as SiO _2, is sealed in the heat storage tank 2.

Around the heat storage tank 2, a heat insulating material 5 is provided.
Have been placed and are being thermally cut off. The heat insulating material 5 has an opening formed below and a hot air passage 6 formed between the heat insulating material 5 and the heat storage tank 2.

A ceramic heater (PTC heater) 7 is provided below the opening of the heat insulating material 5. A warm air blowout port 8 and an air intake port 9 are formed on the front surface and the rear surface of the lower portion of the housing 1 in which the PTC heater 7 is arranged, of which a warm air louver 10 is formed at the warm air blowout port 8. A shutter 11 is provided on the air intake 9 side.

The shutter 11 is rotated in the direction of the arrow to adjust the amount of air flow, and the amount of air flowing to the heat storage tank 2 side is adjusted by the rotation angle. A blower motor 12 is provided on the rear surface of the housing 1, and a blower fan 13 is attached to its rotation shaft.

On the other hand, an operation board 14 is provided on the top of the housing 1. The operation board 14 has a function of performing power on / off, heating operation start, heat storage completion time, temperature setting, hot air start time, selection of the heat storage heater 3 or the PTC heater 7, and a manual operation for these functions. A manual operation panel 15 such as buttons is provided on the upper surface of the housing 1.

An abnormal temperature sensor 16 for detecting an abnormal temperature inside the heater, for example, a thermistor, is arranged above the heat insulating material 5, and an abnormal temperature rise when the abnormal temperature sensor 16 does not operate. A thermal fuse 17 is provided to prevent this.

A heat exhaust port 18 is formed on the rear surface of the housing 1 for letting out the air inside the housing. With such a configuration, when the heat storage heater 3 is energized, the heat generated from the heat storage heater 3 is stored in the heat storage material 4.

The heat storage operation for the heat storage material 4 is stopped,
When the heating operation is performed on the manual operation panel 15, the blower fan 13 is rotationally controlled. The air sucked by the rotation of the blower fan 13 is blown to the heat storage heater 3 side and the ceramic heater 7 side.

The air sent to the heat storage heater 3 side receives heat from the heat storage tank 2 by flowing through the hot air passage 6 and its temperature rises, and is sent as warm air from the hot air outlet 8.

At the same time, the air sent to the PTC heater 7 side receives heat from the PTC heater 7 and its temperature rises,
The air is combined with the warm air from the heat storage tank 2 and is sent. Thus, by using the heat storage heater 3 side and the ceramic heater 7 side at the same time, it is possible to compensate for the low calorie emission as a warm air heater and to improve the start-up characteristics during heating.

A heat storage sensor 19 is provided for the heat storage material 4 to control the heat storage temperature. When the heat storage temperature of the heat storage material 4 is high, the power supply to the heat storage material 4 is cut off.

In order to prevent the heat of the heat storage material 4 from escaping to the outside of the housing 1 and to shut off the heat when the heat storage material 4 has reached a high temperature, a heat insulating material 5 is provided around the heat storage material 4. It is arranged.

However, even if a material having a high heat insulating efficiency is used as the material of the heat insulating material 5, a small amount of heat leaks. The leaked heat is released to the outside of the housing 1 as a natural draft phenomenon. If the heat is not released to the outside of the housing 1 in this way, the heat is trapped inside the housing 1 and the housing 1
The outer shell of the housing may be deformed, or the temperature of electric parts inside the housing 1, particularly the temperature of electronic parts on the operation board 14, may rise and the functions may be lost or lost.

Therefore, the abnormal temperature sensor 16 detects the temperature above the heat insulating material 5, and when the detected temperature reaches a predetermined abnormal temperature, the heat storage for the heat storage material 4 and the heating operation are stopped. .

Further, if the abnormal temperature sensor 16 fails and does not detect the abnormal temperature even when it reaches a predetermined abnormal temperature, the temperature fuse 17 is blown when the temperature rises slightly above the abnormal temperature. The heat storage for the heat storage material 4 and the heating operation are stopped. That is, double failure guard is applied.

[0018]

However, the housing 1
Even if double failure guards are applied to the abnormal temperature sensor 16 and the thermal fuse 17 against the abnormal temperature rise therein, the electronic components and the like of the operation board 14 may be thermally destroyed due to the abnormal temperature.

For example, when the case 1 is covered with a curtain or the like,
The temperature in the housing 1 may locally rise without releasing the heat in the housing 1 to the outside. FIG. 5 shows a state where the curtain 19 covers one side of the housing 1.

In this state, heat cannot escape from each heat exhaust port 18 where the curtain 19 is covered, and the heat is trapped in the housing 1. However, the curtain 19
Heat escapes from each heat exhaust port 18 that is not covered by the above, and the temperature does not rise.

Therefore, the temperature of the operation board 14 on the side covered with the curtain 19 rises to reach an abnormal temperature, but conversely the temperature of the operation board 14 on the side not covered with the curtain 19 does not rise. It will be.

In such a state, if the abnormal temperature sensor 16 is on the side not covered by the curtain 19, the abnormal temperature sensor 16 does not detect the abnormal temperature even if a part of the operation board 14 reaches the abnormal temperature. It will be.

Therefore, the abnormal temperature of the operation board 14 cannot be detected, and the electronic components on the operation board 14 are thermally destroyed. Therefore, an object of the present invention is to provide a heat storage type hot air heater capable of detecting an abnormal temperature and reliably protecting electronic components.

[0024]

According to the first aspect of the present invention, the heat storage material is arranged in the main body of the heater and the operation portion is arranged above the heat storage material, and heat is stored in the heat storage material by operating the operation portion. In the heat storage type hot air heater that performs the heat stored in the heat storage material as hot air after this, a heat exhaust guide plate arranged between the heat storage material and the operation section, and the operation section are provided. A heat storage type hot air heater, which is provided with an abnormal temperature sensor for detecting that the operating portion has reached an abnormal temperature, and which aims to achieve the above object.

According to the second aspect, the exhaust heat guide plate is formed of a metal plate having good thermal conductivity. According to the third aspect, the abnormal temperature sensor is arranged near the electronic component having the weakest heat resistance in the operation portion. According to the fourth aspect, when the abnormal temperature sensor detects the abnormal temperature of the operating portion, the heat storage operation and the warm air blowing operation for the heat storage material are stopped.

[0026]

According to the first aspect of the present invention, the heat leaked from the heat storage material reaches the exhaust heat guide plate, so that the heat is conducted in the exhaust heat guide plate and a uniform temperature rise occurs.
Thereby, even if heat is locally transmitted to the exhaust heat guide plate, the exhaust heat guide plate has a uniform temperature. Due to this uniform temperature of the exhaust heat guide plate, the temperature of the operating portion above it also rises uniformly. Therefore, the abnormal temperature of the operating unit is detected by the abnormal temperature sensor provided in the operating unit.

According to the second aspect of the present invention, the exhaust heat guide plate made of a metal plate having good thermal conductivity has a uniform temperature even if heat is locally transmitted to the exhaust heat guide plate. Become. According to the third aspect, by disposing the abnormal temperature sensor in the vicinity of the electronic component having the lowest heat resistance in the operation portion, it is possible to protect all the electronic components in the operation portion. According to the fourth aspect, when the abnormal temperature sensor detects the abnormal temperature of the operation portion, the operation of storing heat and blowing warm air to the heat storage material is stopped, and the operation portion is protected.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same parts as those in FIG. 4 are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 is an overall configuration diagram of the heat storage type warm air heater, and FIG. 2 is a configuration diagram of an upper part of the housing.

A heat exhaust guide plate 30 is arranged between the heat insulating material 5 and the operation board 14. This exhaust heat guide plate 30
Are arranged so as to rise toward the heat exhaust ports 18 on the rear surface of the housing 1, and are formed of a material having good thermal conductivity, for example, a metal plate such as copper or iron.

An abnormal temperature sensor 31 such as a thermistor is arranged in the center of the operation board 14. The abnormal temperature sensor 31 operates when the operation board 14 reaches an abnormal temperature, for example, 90 ° C., which is lower than the temperature at which electronic components arranged on the operation board 14 are destroyed by heat, and outputs an abnormal temperature detection signal. It has a function to output.

Although the abnormal temperature sensor 31 is arranged in the central portion of the operation board 14 in the figure, it is not limited to this, and it is optimal to arrange it in the vicinity of the electronic component most susceptible to heat on the operation board 14. is there.

On the other hand, the configuration of the electric system is shown in FIG. CPU
The input units 41 and 42, the warm air control unit 43, the power control unit 44, and the motor drive unit 45 are connected to the main control unit 40.

Of these, the heat storage material sensor 1 is connected to the input section 41.
9 and the abnormality detection sensor 31 are connected. Further, the input unit 42 includes a manual operation panel 1 such as a temperature setting device.
5 is connected.

The hot air controller 43 compares the set temperature operated on the manual operation panel 15 with the room temperature,
It has a function of sending a power control signal corresponding to the temperature difference to the power control unit 44 and sending a drive control signal to the motor drive unit 45.

The power controller 44 has a function of receiving a power control signal from the warm air controller 43 and controlling the amount of power supplied to the heat storage heater 3 and the ceramic heater 7. The motor drive unit 45 has a function of receiving a drive control signal from the warm air control unit 43 and rotationally driving the blower motor 12 at a rotation speed instructed by the drive control signal.

The main control section 40 includes an abnormal temperature sensor 31.
It has a function of issuing an operation stop command to the warm air control unit 43 when it receives an abnormal temperature detection signal output from. When the thermal fuse 17 is blown, the electric power supplied to these electric systems is cut off.

Next, the operation of the heater configured as described above will be described. When the operation start operation is performed and the desired temperature is set on the manual operation panel 15, the main control unit 40 issues a heat storage command to the power control unit 44.

The power control unit 44 energizes the heat storage heater 3 in response to the heat storage command. As a result, the heat generated by the heat storage heater 3 is stored in the heat storage material 4. When heat is sufficiently stored in the heat storage material 4 and the heat storage operation is stopped, the main control unit 40 issues an operation command to the warm air control unit 43.

The warm air control unit 43 compares the set temperature operated on the manual operation panel 15 with the room temperature, and outputs a power control signal corresponding to the temperature difference to the power control unit 44.
And a drive control signal to the motor drive unit 45.

Of these, the power control unit 44 is the hot air control unit 4
3 controls the amount of power supplied to the heat storage heater 3 and the ceramic heater 7 by receiving a power control signal from the motor 3, and the motor drive unit 45 receives the drive control signal from the warm air control unit 43 to rotate the blower motor 12. To drive.

However, the air sucked by the rotation of the blower fan 13 is sent to the heat storage heater 3 side and the ceramic heater 7 side, and the air sent to the heat storage heater 3 side is the hot air passage 6 Flow through the heat storage tank 2 to receive heat from the heat storage tank 2 to raise the temperature, and the hot air outlet 8
Sent as warm air.

At the same time, the air sent to the PTC heater 7 side receives heat from the PTC heater 7 and its temperature rises,
The air is combined with the warm air from the heat storage tank 2 and is sent. Here, in the state where heat is stored in the heat storage material 4, even if a material having high heat insulating efficiency is used as the material of the heat insulating material 5, a small amount of heat leaks.

The leaked heat is conducted to the upper side of the housing 1 and reaches the exhaust heat guide plate 30.
And is discharged to the outside of the housing 1 from each heat exhaust port 18.

Here, since the exhaust heat guide plate 30 is made of a material having good thermal conductivity, the exhaust heat guide plate 30 as a whole rises to a uniform temperature by receiving the leaked heat.
By the way, in this state, for example, when the curtain or the like covers the back surface of the housing 1 and some of the heat exhaust ports 18 are closed,
The temperature inside the housing 1 on the side where the heat exhaust port 18 is closed rises.

The temperature rise in the housing 1 is caused by the exhaust heat guide plate 3
Since it is conducted to 0, the exhaust heat guide plate 30 further rises at a uniform temperature throughout the exhaust heat guide plate 30. If the exhaust heat guide plate 30 as a whole rises at a uniform temperature in this way,
The temperature of the operation board 14 above the exhaust heat guide plate 30 also rises uniformly.

Therefore, even if the temperature on the closed side of the heat exhaust port 18 in the housing 1 rises, the temperature of the entire operation board 14 rises uniformly. In this state, the operation board 1
When the temperature of 4 reaches the abnormal temperature of 90 ° C., the abnormal temperature sensor 31 operates and outputs an abnormal temperature detection signal.

Thus, when the main control unit 40 receives this abnormal temperature detection signal, it issues an operation stop command to the warm air control unit 43, so that the power control unit 44 energizes the heat storage heater 3 and the ceramic heater 7. And the rotation of the blower motor 12 is stopped by the motor drive unit 45.

As a result, the temperature of the operation board 14 is 90 ° C.
Without reaching the above, each electronic component on the operation board 14, such as a microcomputer and a capacitor, is not destroyed by high heat.

As described above, in the above embodiment, the heat leaked from the heat storage material 4 is received by the exhaust heat guide plate 30 to be raised at a uniform temperature, and the abnormal temperature sensor 31 is operated by the operation board 14.
Since it is arranged above, even if heat is locally transmitted to the exhaust heat guide plate 30, the exhaust heat guide plate 30 has a uniform temperature, and the entire operation board 14 above the exhaust heat guide plate 30 is The temperature can also be raised uniformly, whereby the temperature of the operation board 14 can be accurately detected, and in particular, an abnormal temperature of 90 ° C. is detected, and electronic components such as a microcomputer and a capacitor on the operation board 14 which are weak against heat. Can be surely protected.

In particular, by disposing the abnormal temperature sensor 31 in the vicinity of the electronic component having the lowest heat resistance, the electronic component having the lowest heat resistance can be protected from heat and the operation board 1 can be protected.
4. All electronic components on 4 can be protected from heat.

Moreover, since the exhaust heat guide plate 30 rises at a uniform temperature, one abnormal temperature sensor 31 is connected to the operation board 1.
All the electronic components on the operation board 14 can be protected from heat only by disposing them on the control board 4.

Further, since the exhaust heat guide plate 30 is arranged so as to be inclined toward the exhaust heat ports 18, the heat insulating material 5 is normally provided.
The heat leaked through can be transmitted to each heat exhaust port 18 and released to the outside.

Further, the exhaust heat guide plate 30 can act as a heat shield for the operation board 14 against the heat leaked through the heat insulating material 5. On the other hand, since the heat storage for the heat storage material 4 must be performed from 2 to 3 hours before the heating operation, a person may approach the heater during the heat storage, and it is necessary to sufficiently ensure the safety. In this respect, in the above heating device, since the abnormal temperature in the housing 1 is reliably detected and the operation is stopped,
Safety can be secured during heat storage and during heating operation.

[0054]

As described in detail above, according to the present invention, it is possible to provide a heat storage type hot air heater capable of detecting an abnormal temperature and reliably protecting electronic components.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a heat storage type warm air heater according to the present invention.

FIG. 2 is a configuration diagram showing a function of preventing an abnormal temperature rise of the heating machine.

FIG. 3 is a configuration diagram of an electric system of the heating device.

FIG. 4 is a configuration diagram of a conventional heater.

FIG. 5 is a diagram showing an example of creating an abnormal temperature condition of the same heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Enclosure, 3 ... Heat storage heater, 4 ... Heat storage material, 5 ... Insulation material, 12 ... Blower motor, 14 ... Operation board, 18 ... Exhaust port, 30 ... Exhaust heat guide plate, 31 ... Abnormal temperature sensor.

Claims (4)

[Claims] 1. A heat storage material is arranged in a heater main body, and an operation part is arranged above the heat storage material, and heat is stored in the heat storage material by operating the operation part, and thereafter, heat is stored in the heat storage material. In a heat storage type hot air heater that blows heat as warm air, a heat exhaust guide plate disposed between the heat storage material and the operation section, and the operation section, the operation section is provided at an abnormal temperature. A heat storage type warm air heater characterized by being equipped with an abnormal temperature sensor for detecting that the temperature has become low. 2. The heat storage type hot air heater according to claim 1, wherein the exhaust heat guide plate is formed of a metal plate having good thermal conductivity. 3. The heat storage type hot air heater according to claim 1, wherein the abnormal temperature sensor is arranged in the vicinity of the electronic component having the weakest heat resistance in the operation portion. 4. The heat storage type warm air heater according to claim 1, wherein when the abnormal temperature sensor detects an abnormal temperature of the operating portion, the operation of storing heat to the heat storage material and blowing hot air is stopped.