JPH0447528Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electric kotatsu for heating a general household in winter.

Conventional technology In conventional electric kotatsu, the temperature is generally controlled by a phase control method using the signal of the temperature sensor, and the correlation between the impedance change due to the temperature of the temperature sensor and the output of the heating element is The temperature-output characteristics were prepared as shown in the figure.

For example, when the temperature is set to the maximum, the heating element will be heated at 100% of the rated output while the temperature is low at the beginning of energization.
As the temperature of the sensor rises, its impedance changes and the output of the heating element decreases, eventually stabilizing at a low output that is less than half the rating of the heating element, which balances the heat loss from the kotatsu futon etc. at that temperature. It is something to do. As shown in FIG. 6, this stable temperature is determined in advance and used as the initial temperature setting value.

In addition, when the temperature was set at a lower temperature, the output of the heating element was limited from the beginning, so the temperature rise was slow.

Problems that the invention aims to solve When looking at the actual use of the conventional electric kotatsu at home, it is found that if the desired temperature is set from the beginning of energization after stabilization, the temperature rises slowly and becomes lukewarm. Initially, it required manual operations each time, such as setting the temperature control setting to the highest position and rapidly heating it up, and then gradually adjusting it to the desired temperature setting after it had warmed up sufficiently.

Also, the initial heating method at the highest scale varies depending on the temperature of the day and the temperature of the kotatsu at that time. Humans had to make various adjustments each time, such as making it a little higher.

As mentioned above, in order to obtain a desired temperature state as quickly as possible at the initial stage of energization, the manual temperature adjustment operation must be performed every time and is time-consuming.

Measures to solve the problems In order to solve the problems seen in conventional examples, we used sensors to detect information such as room temperature, kotatsu temperature, which humans normally feel, and the desired temperature after stabilization, and adopted a microcomputer. The aim is to automatically perform temperature control operations that previously had to be performed by humans by determining this detected data. Specifically, if you set the temperature control scale to your desired temperature from the beginning, when the electricity first starts up, the kotatsu will use quick heating control to warm up at the highest scale output until the inside of the kotatsu reaches the temperature control set temperature + α℃. When doing this, if the temperature of the room temperature sensor is low at the start of energization, increase +α℃,
This is a temperature control device that automatically sets settings to reduce +α°C if the temperature of the room temperature sensor is high.

Effect With the above configuration, the heating at the initial stage of energization is not the output of the temperature control scale, but the output of the highest scale.
The temperature control set temperature is heated to +α°C, and this +α°C is automatically set to be large if the room temperature is low at the beginning of energization, and to be small if the room temperature is high.

As a result, it is possible to automatically adjust the temperature, which was conventionally done manually, and to provide rapid heating.

Example An example of the present invention is shown in Figs. 1, 2, and 3 below.
This will be explained with reference to the drawings and FIG.

1 is a lamp-shaped heating element made of a rod-shaped quartz tube. 2 is a temperature sensor consisting of a thermistor whose impedance changes with temperature changes. Reference numeral 3 denotes a heating element unit composed of a heating element 1, a temperature sensor 2, etc., and is mounted at the center of the back surface of the wooden tower 4. 5 is a controller that is connected to the heating element unit 3 by a cord and placed outside the tower 4, and has a power switch 6 for turning on and off the power, a temperature control setting device 7, a room temperature sensor 8, and a controller for controlling the temperature inside the kotatsu. It is equipped with a temperature control device 9 and the like.

The temperature control device 9 has a temperature-output characteristic of phase control which is basically the same as the conventional one as shown in Fig. 5, but the output control can be switched to output control corresponding to each scale using an internal switching circuit depending on the heating conditions. .

The operation of this embodiment having the above configuration will be explained.

When the power is turned on, it detects the room temperature, kotatsu temperature, temperature control setting temperature, etc., and operates according to the heating conditions as follows.

If the temperature control setting temperature is lower than the current kotatsu temperature, e.g.
When the temperature is set to a high temperature that is more than ℃, as shown in Figure 2, the heating at the initial stage of energization is not the output at the set temperature control scale position, but the output at the highest scale, which is the temperature control set temperature + α
It heats up to ℃, so it heats up quickly. This +α℃
As shown in Fig. 3, the initial detection data of the room temperature sensor 8 is used to create a difference between when the room temperature is low and when it is high. do.

In this way, the heating conditions are determined at the initial stage, for example, 5°C.
When the power is turned on with the temperature control set higher than the distance above, the output will be at the highest scale instead of the temperature control scale output in order to warm up faster.The temperature control set temperature + α℃
Heat all at once until it reaches kotatsu temperature. For example, when the temperature is set at 5° C. or less, the temperature is heated at the output of the temperature control setting and no peak occurs.

Effects of the invention According to the invention, a function is provided to control the temperature in the kotatsu and the temperature adjustment settings set by the person taking the temperature to suit the optimum heating speed. Sometimes, just by turning on the power switch of the kotatsu, the kotatsu was able to obtain the highest heating speed and be sufficiently warmed up immediately, and there was no need to adjust the temperature, making it convenient and hassle-free.

In addition, with this rapid heating control, even if you set your favorite temperature, it will heat up to the temperature control set temperature + α℃ at the highest scale output at once, so you can warm not only the air inside the kotatsu but also the floor and futon sufficiently at the beginning, making it comfortable. be. Furthermore, when the room temperature is high, this +α°C becomes smaller, and the temperature does not change more than necessary, which has the effect of saving energy.

This temperature of +α°C makes the user decide to warm up to a high temperature when the room temperature is low and to warm to a low temperature when the room temperature is high, resulting in comfortable heating that is in line with the human experience of taking warmth. This is a human thing because it does not have a uniform temperature of +α℃ under any conditions.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of an electric kotatsu showing an embodiment of the present invention, Fig. 2 is a temperature characteristic diagram thereof, Fig. 3 is an explanatory diagram of the temperature characteristics, Fig. 4 is a block diagram of the same, and Fig. 5 is a temperature-output characteristic diagram of the conventional example, and FIG. 6 is the same temperature characteristic diagram. 1... Heating element, 2... Temperature sensor, 8... Room temperature sensor, 9... Temperature control device.

Claims (1)

[Scope of utility model registration request] The heating element unit consists of a heating element 1 and a temperature sensor 2 that detects the temperature inside the kotatsu, and the temperature inside the kotatsu can be controlled to a set temperature using the signal from the temperature sensor 2. In an electric kotatsu consisting of a temperature control device having
At the start of the first energization, when performing quick heating control that warms up with the highest scale setting output until the inside of the kotatsu reaches the temperature control set temperature + α ℃, if the temperature of the room temperature sensor at the beginning of energization is low, increase +α ℃,
Temperature control device 9 that automatically sets settings to reduce +α℃ if the temperature of the room temperature sensor is high.
An electric kotatsu that is characterized by: