JPH02178531A - Heater for floor-recessed foot warmer (kotatsu) - Google Patents

Abstract

PURPOSE:To make an operating part compact and to provide ease of use without giving users an anxiety about the temperature of the operating part by a method wherein a control box with a built-in controller, that controls the power supply to a heater unit, is mounted on the bottom of a foot warmer main body, and an adjusting part, that adjusts the controlled variable of the controller, is provided on the operating part. CONSTITUTION:A unit heater 12 fixed on the bottom 13 of a foot warmer main body 7 releases to heat the space 11 to be heated. A control box 14 mounted on the bottom 13 is connected to the heater heating unit 12 and an operation part 19 which is located outside the space 11 to be heated. A user is able to adjust the temperature in the space 11 by operating a volume 29 on the operating part 19. Being equipped with only the volume 29 and a power source switch 36, the operation part 19 is light in weight and compact in size, resulting in ease of handling it with a human hand. Since the volume 29 and the power switch 36 scarcely generate heat, the temperature of the operating part hardly rises. Therefore, the user does not worry about the temperature of the operation part when using it.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a horikotatsu heater that is installed embedded in a floor surface.

2. Description of the Related Art Conventionally, this type of hori kotatsu heater had a structure as shown in FIG.

That is, the heater unit 2 is fixed on the bottom surface of the kotatsu main body l installed embedded in the floor surface, and this heater unit 2
Power is supplied to the device by sequentially connecting the power cord 3, controller 4, and connection cord 5. The controller 4 has a built-in control device consisting of a triac etc. that controls the amount of electricity supplied to the heater unit 2, and has large heat dissipation fins for dissipating heat from the triac, a choke coil for preventing electrical noise, a capacitor, etc. ing. In addition, if the controller 4 falls into the kotatsu body 1,
If the controller 4 is covered with
In order to prevent the temperature from rising abnormally, a thermo stand that shuts off the power is attached to the radiation fin.

Problems to be Solved by the Invention However, with such a configuration, the controller 4 becomes hot due to heat dissipation from the triac, causing anxiety and anger to the user. In addition, since the controller 4 includes a control device, a triac heat dissipation fin, a choke coil, etc., it is large and heavy, making it difficult for a user to hold it in their hand and operate it.

Furthermore, if one group 6 is covered by the controller 4, heat radiation will be inhibited, and the thermostat will immediately activate and cut off the power, causing the temperature inside the kotatsu body 1 to drop, so the controller 4 must be handled with great care. It was something. In particular, as the power consumption of the heater unit 2 increases, the above-mentioned drawbacks become more noticeable.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a hori kotatsu heater that has a compact operating part that is easy to hold in hand without causing anxiety due to heat generation, and that does not turn off when the operating part is covered with a mattress.

Means for Solving the Problems In order to achieve the above object, the present invention provides a method of installing a control box on the bottom of the kotatsu main body, which includes a control device for controlling the supply of electricity to the heater unit installed on the bottom of the kotatsu main body. However, a component for adjusting the control amount of the control device is provided in the operating section.

Effect: With the above configuration, there is no heat-generating component in the operating section and the temperature does not rise, so the user does not feel uneasy. Furthermore, the operation section is compact and lightweight, making it easy to use. Further, since the operating section does not generate heat, there is no need to provide a safety device such as a thermostat, and as a result, there is no problem such as turning off the heater unit even if the operating section is covered with a mattress.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 is an installation diagram of a hori kotatsu heater according to an embodiment of the present invention. Reference numeral 7 denotes a kotatsu body installed embedded in the floor surface 8, and the kotatsu body 7, the tower body 9, and a group 10 constitute a heating space II. 12 is the bottom surface 1 of the kotatsu body 7
This is a heater unit fixed on the heating space 11, and is designed to generate heat to warm the heating space 11. 14 is the bottom surface 13
The heater unit 12 is electrically connected to the heater unit 12 via a relay cord 15.

The control box 14 is installed at the lower side of the heater unit 2, and is not easily affected by thermal convection of the heater unit 2. The control box 14 is the lowest temperature position in the kotatsu main body 7, but in order to further enhance the heat dissipation effect, the lower case 16 of the control box 14 has an opening 1 provided in the bottom surface 13.
It protrudes below 7 and faces the underfloor space below the bottom surface 13. An operating section 19 led out of the heating space 11 is connected to the control box 14 via a connection cord. 20 is a power outlet attached to the side of the kotatsu main body 7, and power is supplied to the control iTJ box 14 through a power cord 21.

FIG. 2 is an enlarged partial sectional view of the control box 14. The outer shell of the control pump 14 is composed of a lower case 16 and an upper case 22. The lower case 16 is made of metal and has a box shape with no gaps to prevent moisture from entering the space under the floor. The upper case 22 is made of synthetic resin in order to block the temperature inside the kotatsu 7. control bonx 1
A control circuit 23 and a triac 24 for controlling the power of the heater unit 12 are provided inside the housing 4, and the triac 24 is fixed to the lower case 22 via a metal mounting base 25.

FIG. 3 is an example of an electric circuit diagram of the hori kotatsu heater of the present invention. 26 is a heating element, 27 is a temperature sensor that detects the temperature near the heating element 26, and 28 is a temperature fuse that prevents abnormal temperature rise when the temperature sensor 27 is abnormal; is provided within the heater unit 12. 24 is a triac which is a power control element, and 29, 30, and 31 are a volume, a fixed resistor, and a fixed resistor connected in series to the temperature sensor 27.
It's a capacitor. 32 is a diac which is a switching element connected from a connection point 33 between a fixed resistor 30 and a capacitor 31 to the gate terminal of the triac 24. When the voltage at the connection point 33 exceeds a certain level, it becomes conductive and sends a gate pulse to the triac 24. and turns on the triac 24. 34a, 34b, and 35 are two choke coils and a capacitor for preventing electrical noise in the circuit, and 36 is a power switch. The temperature sensor 27 has a positive temperature resistance coefficient such that the resistance value is small when the temperature is low, and the resistance value is large when the temperature is high.

The volume 29 and power switch 36 are housed in the operation section 19, and the triator 24 and other electronic parts are all housed in the control box 14.

Next, the operation of the configuration of this embodiment will be explained.

When the user turns on the power switch 36 of the operation unit 19, the temperature sensor 27 is turned on because the temperature of the heating space 11 is still low.
The resistance value of the capacitor 31 is small, so the voltage applied to the capacitor 31 is high, and the time for charging the capacitor 31 is fast. That is, the potential at the connection point 33 increases rapidly and quickly reaches the switching voltage of the diac 32, turning on the diac 32 and turning on the triac 24.
is turned on in a state where the conduction angle is large, and current flows through the heating element 2G in a state close to full energization. When the temperature of the temperature sensor 27 rises due to the heat generated by the heating element 26, the resistance value of the temperature sensor 27 increases, and the voltage applied to the capacitor 31 decreases, so that the potential of the connection point 33 becomes lower than that of the diac 3.
2 is delayed in reaching the switching voltage of
The triac 24 is turned on with a small conduction angle, and the current to the heating element 26 is restricted. That is, the temperature sensor 27
As the temperature of the triac 24 increases, the conduction angle of the triac 24 becomes smaller, and the current flowing through the heating element 26 becomes smaller.
The amount of heat generated decreases, and the temperature of the heating space 11 is kept constant. The triac 24 controls the power by phase control, and at this time, a large amount of heat is generated, but the heat is appropriately radiated from the lower case I6 of the control box 14 to the underfloor space via the mounting base 25. .

Further, the user can adjust the temperature of the heating space 11 by operating the volume 29 of the operating section 19. The larger the resistance value of the volume 29 is, the smaller the current flowing through the heating element 26 becomes, and the temperature of the heating space 11 becomes lower.

As described above, since the operating section 19 has only the volume 29 and the power switch 36 built-in, it can be made compact and light, and is very convenient to use when held in the hand. Since the volume 29 and the power switch 36 generate almost no heat, there is almost no temperature rise in the operating section 19, and therefore, the user does not feel uneasy about the temperature during operation. In addition, since there are no heat-generating parts in the operating section 19, there is no need to provide a safety device such as a thermostat as seen in conventional examples.
Even if the mattress 10 or the like is placed over the heater unit 9, problems such as turning off the power to the heater unit 2 will not occur.

In addition, by providing the control box 14 containing the heat-generating triac 24 and other electronic components on the bottom surface 13, which has the lowest temperature inside the kotatsu main body 7, the control box 14
The dimensional restrictions on the triac 4 are reduced, the triac 24 can be made large enough for heat dissipation, and the durability of the triac 24 can be increased. As in the embodiment, by making the lower part of the control box 14 face under the floor below the floor surface 13 of the kotatsu main body 7, the effect will be further enhanced.

Effects of the Invention As described above, the present invention installs a control box containing a control device on the bottom of the kotatsu main body, which controls the power supply to the heater unit installed on the floor of the kotatsu main body, and controls the control amount of the control device. Since the adjustment parts are provided in the operating section, there is almost no heat generation in the operating section, and the user does not feel uneasy about the temperature. In addition, the operation section can be made compact and lightweight, making it easy to use.

In addition, there is no need to install a temperature safety device on the operating section.
Even if a blanket or the like is placed over the operating section, problems such as the heater unit turning off will not occur. Also,
Since there are fewer dimensional restrictions on the control box, it can be made large enough to dissipate heat from heat-generating electronic components, and as a result, the durability of the control device can be increased.

[Brief explanation of the drawing]

Figure 1 is an installation diagram of a Horikotatsu heater according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of the control box of the heater, FIG. 3 is an electric circuit diagram used in the heater, and FIG. 4 is an installation diagram of a conventional Horikotatsu heater. 7... Kotatsu body, 12... Heater unit, 14... Control box, 19... Modification part.

Claims (2)

[Claims] (1) A heater unit installed on the floor of a box-shaped kotatsu body with an opening on the top, which is installed embedded in the floor, a control box containing a control device for controlling electricity supply to the heater unit, and the control device Equipped with an operation section to adjust the control amount of
A hori kotatsu heater in which the control box is installed on the bottom of the kotatsu body. (2) The horikotatsu heater according to claim (1), wherein a part or the whole of the control box faces under the floor at the bottom of the kotatsu main body.