JPS58148340A - Hot air type heater - Google Patents

Abstract

PURPOSE:To make it possible to recognize by eyes the quantity of calory of a heater due to blasting by an indicator with respect to the hot air heater well adapted to be used for a drier, a warmer and the like. CONSTITUTION:An operating part is suitably operated to suitably operate a control circuit 7, and the quantity of a current supplied (connection angle, for example) of a triac 6 is determined by the action of the control circuit 7. Effective power is applied to the coil of a motor 5 of a blower 3 corresponding to the quantity of power supplied determined by the triac 6, and the motor 5 of said blower 3 rotates the fan 4 of the blower 3 at a rotational speed corresponding to the above effective power. A predetermined quantity of air is sent to a heater 2 by the fan 4 of the blower 3 to thereby produce hot air and obtain a predetermined quantity of hot air. Upon this occasion, effective power corresponding to the quantity of the current supplied determined by the triac 6 is applied to an indicator 8. The indicator 8 is lighted by the brightness (light and darkness) corresponding to the above effective value, and the calory of the heater 2 is indicated by light and darkness of the indicator 8.

Description

[Detailed Description of the Invention] The present invention relates to a hot air device suitable for use in dryers, heating devices, etc. that use hot air, and in particular, the amount of heat generated by the heater due to air blowing can be visually confirmed using a display. This relates to hot air equipment.

Conventional hot air devices, such as those used in hot air type Yagura Kotatsu, are equipped with a heater whose resistance value increases as the temperature rises, an air blower that blows air to the heater, and a control circuit that controls the amount of hot air from the air blower. For wind devices, such as those using infrared lamps as heaters, the infrared rays,
Visually check the amount of heat generated depending on the brightness of the lamp (recognize by visual inspection)
However, it had the disadvantage of lacking psychological and visual heating effects.

The present invention relates to a hot air device suitable for use in eliminating the above-mentioned drawbacks.

An embodiment of the hot air device of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the hot air device of the present invention connects a heater 2 whose resistance value increases as the temperature rises to an AC power source 1, and a motor 5 that rotates a blower 30/4 to blow air to the heater 2. Triac 6 that controls the rotation speed of motor 5
are connected in series to the above AC power supply l, and the triac 6
A control circuit 7 for controlling the rotation speed of the motor 5 is connected to the AC power source 1, and the motor 5 is connected to the blower 3.
It is constructed by connecting in parallel a display body 8 consisting of a display lamp or the like for displaying the amount of heat generated by the heater 2 (large or small).

In the above configuration, the heater 2 is a semiconductor heater having positive temperature characteristics, which is commercially available under the names of honeycomb heater, harmonica heater, etc., and the semiconductor heater has a large number of through holes. The blower 3 is a heater having a positive temperature characteristic in which the amount of heat generated is proportional to the amount of air passing through the fan, and the blower 3 uses a triac 6 to vary the amount of current supplied to the motor 5 and hence the effective power to vary the rotation speed of the motor 5.
By varying the rotation speed of the motor 5, the rotation speed of the fan 40 is varied to vary the amount of air being blown.The control circuit 7 has an operating section consisting of a variable resistor, etc., and is operated by the control circuit 7. By doing so, the control circuit 7 is operated and the triac 6 is controlled, and the display 8 displays a heater 2 whose brightness changes according to the amount of air blown by the blower 3 and whose heat output changes according to the amount of air blown. The amount of heat generated is displayed in terms of brightness and darkness.

Next, the operating state of the hot air device configured as described above will be explained. The control circuit 7 is suitably operated by operating the operating section as appropriate, and the amount of current flowing through the triac 6 (for example, conduction angle) is determined, and the effective power corresponding to the amount of current determined by the triac 6 is applied to the blower 3.
The motor 5 of the blower 8 rotates the fan 4 of the blower 3 at a rotation speed corresponding to the effective power, and the fan 4 of the blower 3 generates a predetermined air volume. Air is blown to a heater 2, and the heater 2 converts the air into hot air to obtain a predetermined amount of hot air. At this time, display body 8
An effective power corresponding to the energization amount determined by the triac 6 is applied to the heater 2, and the display 8 is lit in a brightness corresponding to the effective power to display the amount of heat generated by the heater 2 in brightness and darkness.

In the above case, when the operating section of the control circuit 7 is operated steplessly, the amount of current flowing through the triac 6 changes steplessly by the control circuit 7, and therefore the effective power corresponding to the amount of current flowing through the triac 6 also changes steplessly. is applied to the coil of the motor 5 of the blower 3, the rotational speed of the motor 5 of the blower 8 is changed infinitely, and the fan 4 of the blower 8 blows the variable amount of air to the heater 2. , the heater 2 generates hot air and obtains a steplessly variable amount of hot air. At this time, the effective power that is continuously changed by the triac 6 is applied to the display 8, and the display 8 is lit at a brightness corresponding to the steplessly changed effective power, and the heater 2 is changed steplessly. The amount of heat generated is displayed in brightness and darkness. Therefore, by steplessly operating the operating section of the control circuit 7, the amount of hot air can be changed steplessly, the desired optimum amount of hot air can be easily obtained, and the amount of heat generated by the heater 2 can be changed steplessly. can be displayed as bright and dark on the display 8, and the amount of heat generated can be visually recognized.

Note that the display 8 may be connected in series to the heater 2. The hot air device configured as described above is used in a hot air type Yagura Kotatsu as shown in FIG. An electric heating unit 11 housing a heater 2, a blower 3, and a display 8 is attached to the heater 2, a blower 3, and an electric heating unit 11 containing a display 8, and a temperature control unit 12 containing a control circuit 7 is installed to keep the inside of the kotatsu body 1O warm. The table board 14 is placed on the table plate 14 via the heat retaining device 13, and the temperature is adjusted as appropriate by operating the operating section of the control circuit 7 using the temperature adjusting section I2. In this case, the amount of heat generated by the heater 2 is displayed on the display 8, and psychological and visual heating effects can be produced.

Since the hot air device of the present invention has the above-described configuration, the amount of heat generated by the heater due to air blowing can be visually confirmed on the display, and psychological and visual effects can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic circuit diagram showing an embodiment of the hot air device of the present invention, and FIG. 2 is a schematic diagram of the hot air device of the present invention when it is implemented in a kotatsu. In the drawings, 2 is a heater, 3 is a blower, 7 is a control circuit, and 8 is a display.

Claims (1)

[Claims] 1. A heater whose resistance value increases as the temperature rises, a blower that blows air to the heater, a display that displays the amount of heat generated by the heater due to the air blown by the blower, and a control circuit that controls the amount of air blown by the blower. A hot air device characterized by comprising: