JPS62166264A - Electric framed heater for foot warming - Google Patents

Abstract

PURPOSE:To maintain or change a set temperature in an electric framed heater for foot warming depending on whether the temperature in it is maintained at a certain temperature or it is unstable with temperature variation by providing in a wind passage of a heat generating unit a temperature sensor which makes control of a lowering to some extent the inner temperature of the heater in the state that the air temperature of the air flowing through a wind passage maintains a certain temperature for a certain time and makes control to lower the temperature in the heater step by step repeatedly. CONSTITUTION:It is judged by control treatment in an outside control controller 9 whether the state of temperature in a temperature sensor 5 maintains a certain temperature or is in an unstable state that it is changing. For instance, if the temperature in an electric framed heater for foot warming is constant, control is made to lower the inside temperature to a temperature a little lower than an initially set temperature. Next, if, with the inside temperature lowered, stable state continues for a certain time, control is made to lower again the temperature in the heater to a temperature a little lower than the present temperature. This procedure is repeated to lower the temperature of the heater gradually.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric kotatsu for heating a general household in winter.

Prior Art The temperature inside the kotatsu of a conventional electric kotatsu was controlled as follows. First, a heating element unit consisting of a heater, air blower, etc. is generally installed in the center of the back of the tower, but a temperature sensor is installed inside this heating element unit, and the temperature inside the kotatsu is measured based on this temperature. Monitored by sensors,
The amount of electricity supplied to the heater was controlled to maintain the desired temperature. There are two types of temperature sensor and energization control devices: one that uses a thermostat to directly control the energization of the heater, and one that measures the temperature with a semiconductor sensor and controls the amount of energization to the heater using an electronic circuit. Ta. There are other methods such as controlling the air volume, but it is set to a certain temperature scale.

Looking at the temperature change inside the kotatsu after turning it on,
All the methods had temperature characteristics as shown by the dotted line in Figure 2.

In other words, when you turn on the switch, the heater and air blower operate to raise the temperature inside the kotatsu, and when it eventually reaches the desired set temperature, the temperature sensor controls the amount of electricity supplied to the heater, and the temperature inside the kotatsu is adjusted from then on. 0 Problems to be Solved by the Invention In the conventional technology as described above, the temperature of the electric kotatsu does not change after the switch is turned on and after it has warmed up to the desired setting temperature. It had the function of continuously maintaining temperature.

As a result, the temperature inside the kotatsu remains at the set temperature regardless of whether or not someone is warming the kotatsu.

Therefore, it would be fine if there was always someone there to take the temperature, but in daily life there are many chances of the temperature being maintained at the set scale even without someone taking the temperature. Especially when the temperature is set at a high temperature, it will be warm and comfortable when someone is there to take the heat, but maintaining a high temperature when there is no one to take the heat means high electricity bills and energy loss. In addition, high temperatures have adverse effects such as reducing safety and shortening the lifespan of each component.

Means to Solve the Problems In order to solve the problems seen in the conventional example, a heating element unit using an air blower is installed at the bottom of the kotatsu. When the unit stops working, the temperature of the air flowing through the air passage of one heating element unit remains constant.

Pay attention to the fact that the temperature of the air flowing through this wind path changes when the person taking the heat goes in and out of the kotatsu or moves inside the kotatsu. Depending on the temperature, the set temperature inside the kotatsu is maintained or changed.9 For example, if there is no one taking the heat, a temperature sensor is installed in the heating element unit 7 to lower the temperature, etc., which is controlled by another control circuit. This can be solved by installing it in the wind path.

For production With the above configuration, it is possible to detect whether there is a person taking heat.

The kotatsu temperature is further controlled, and its function is as follows.

When you turn on the power, the heater is energized, warming the inside of the kotatsu, and the temperature sensor monitors the temperature.

When the set temperature is reached, the power to the heater is controlled to maintain the set temperature constant. Here, the air inside the kotatsu is sucked into the heating element unit by the blower, and the inside is used as an air path.

As it is eventually blown out, the air inside the kotatsu is stirred and the temperature inside the kotatsu is evened out.

At this time, by installing a temperature sensor in the air path, the temperature inside the kotatsu can be detected accurately and more sensitively.

In other words, depending on whether the temperature of the temperature sensor installed in the air path is constant, or unstable, such as rising, falling, or changing up and down, Does the control circuit determine whether the temperature inside the kotatsu is maintained at the set temperature?

Trying to control whether the temperature is lowered below the set temperature or raised to the set temperature.

As a result, the temperature of the kotatsu remains constant when there is no one taking the heat, so it is controlled so that it is lower than the set temperature, and the kotatsu is kept lukewarm than the set temperature while heating.

Since the temperature is changing, I control it to raise it to the set temperature.

Furthermore, when the person taking the heat goes in and out of the kotatsu, or is moving around inside the kotatsu to take warmth, the temperature sensor installed in the air passage detects that the temperature of the air flowing through the air passage is unstable. control to maintain the set temperature.

Example An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes a lamp-shaped heater made of a rod-shaped quartz tube, which is formed on both sides of a blower device 2 consisting of a fan 3 and a motor 4. A temperature sensor 5 is a signal source for detecting the temperature inside the kotatsu and controlling the electric power of the heater 1, and is provided in the air passage B of the suction port 61 in the heating element unit Z. 7 is a heating element unit consisting of the heater 1, the blower 2, the temperature sensor 5, etc., and the guard 6
A suction port 61 is provided at the center of the guard 63, and a suction port 62 is provided at the outer periphery of the guard 63. 8 is a tower with legs at the four corners, and a heating element unit 7 is attached to the back of the tower in the center. ◇81 shows the flow of air in the heating element unit 7 portion by the blower.

Futon, (1 = 1 indicates the air flow inside the kotatsu when it is operating as a kotatsu. 9 is the controller.

A signal from the temperature sensor 5 is used to control the amount of electricity supplied to the heater 1 in order to set the temperature inside the kotatsu.The operation of the above configuration will be explained next.

Next, the temperature inside the kotatsu using this temperature sensor 5 is controlled as follows.As shown in Figure 2, when electricity is applied to the kotatsu, the temperature of the kotatsu rises and eventually reaches the set temperature. , the characteristic of continuously maintaining that temperature was the temperature characteristic of the conventional example.In the present invention, the temperature state of the temperature sensor 5 is further changed to either maintain a constant temperature or to an unstable state where the temperature is changing. For example, it is determined by the control processing in the external controller 9 whether the

If the temperature inside the kotatsu is constant, the temperature is controlled to be lowered to a slightly lower temperature than the initially set temperature.If the lowered temperature continues for a certain period of time, then the temperature is slightly lower than the current temperature. Control the temperature of the kotatsu to be lowered, and repeat this process to gradually lower the temperature of the kotatsu.

Effects of the Invention According to the present invention, the temperature control of the kotatsu is performed by determining whether or not the temperature of the kotatsu is at a constant temperature, unlike the conventional method in which the temperature is controlled to maintain a constant temperature at all times. Furthermore, by controlling the temperature of the kotatsu, when the temperature rises when the power is turned on or when one person is taking warmth, in other words, the movement of the kotatsu in and out changes the temperature of the kotatsu, and the internal temperature of the kotatsu changes due to the movement of the person inside the kotatsu. A temperature sensor installed in the air path determines that the temperature fluctuation is an unstable condition and works to maintain the set temperature. By this action.

The temperature inside the kotatsu is kept at the set temperature, and when the temperature is being warmed up by 9 people, the temperature inside the kotatsu has already been maintained at the set temperature for a certain period of time.

Since the temperature of the kotatsu is lowered, there is no need to use wasted electricity to maintain a high temperature when 9 people are not present.
This saves energy.

Furthermore, when no one is present, the temperature of the kotatsu is automatically lowered, making it safe and useful in case you forget to turn it off.

Also, by automatically lowering the kotatsu temperature in stages to a stable temperature.

The shorter the temperature is for an hour after a person leaves the kotatsu, the warmer it will be, and the longer the person leaves the kotatsu, the more energy will be saved. It is comfortable because it does not lower the temperature. In addition, in the unlikely event that a malfunction occurs, even if the temperature is lowered by one step, you will not notice it, making it a system that is safe to use.

[Brief explanation of drawings]

Fig. 1 is a sectional view of essential parts of an electric kotatsu showing an embodiment of the present invention, Fig. 2 is a temperature characteristic diagram of an electric kotatsu showing a conventional example and an embodiment of the present invention, and Fig. 6 is a diagram showing an electric kotatsu according to an embodiment of the present invention. FIG. 1 is a sectional view of main parts showing the entire electric kotatsu according to the embodiment.

Claims (1)

[Claims] A heating element unit (7) consisting of an air blower (2) and a heater (1), and a state in which the temperature of the air flowing through the air passage (6) of the heating element unit (7) is maintained at a constant temperature for a certain period of time. Sometimes we control the temperature inside the kotatsu to lower it slightly.
The temperature sensor (5), which controls the temperature drop inside the kotatsu in a step-by-step manner, is connected to the heating element unit (7).
) An electric kotatsu characterized by being installed in the air passage (6).