JPH0440089Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to an electric kotatsu for heating a general household during the 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 was determined in advance and used as the initial temperature setting value.

Further, when the set temperature is low, the temperature rise is slow because the output of the heating element is also throttled from the beginning.

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 initial stage of energization after stabilization, the temperature rises slowly and becomes lukewarm. Initially, it required manual operation each time, such as setting the temperature control to a high position to quickly warm 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 described above, the manual temperature adjustment operation to obtain a desired temperature state as quickly as possible from the initial stage of energization has to 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℃. This temperature control device automatically sets a temperature of +α°C determined by the initial temperature inside the room or kotatsu at the time of starting electricity supply.

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.
In addition to heating the kotatsu to the temperature control set temperature + α℃, this +α℃ is automatically set to be large when the indoor temperature is low at the beginning of energization, and small when the indoor temperature is high, and furthermore when the temperature inside the kotatsu is low. Or, when the temperature is high, +α°C is automatically set to be larger or smaller, respectively. 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 connected to the heating element unit 3 by a cord and placed outside the tower 4, including a power switch 6 for turning on and off the power, a temperature control setting device 7, a room temperature sensor 8, and a temperature controller for controlling the temperature. It is equipped with equipment 9, etc.

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, the temperature inside the kotatsu, the 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 at a high temperature that is more than ℃, as shown in Figure 2, the heating at the initial stage of energization is not the output of the set temperature control scale, but the output of the highest scale, which heats up to the temperature control set temperature + α ℃, so it heats up quickly. There is. This +α℃ is the third
As shown in the figure, a difference is made between when the room temperature is low and when the room temperature is high based on the initial detection data of the room temperature sensor 8. For example, when the room temperature is low, +α°C is set to a larger value to heat the kotatsu more sufficiently. Furthermore, at the same time, the temperature of the kotatsu changes depending on the data detected by temperature sensor 2, depending on whether the temperature of the kotatsu is low or high at the beginning of electricity application, and when it is close to room temperature and low, the value of +α℃ is increased. However, if the kotatsu temperature has warmed up to a certain extent, for example when the power is turned off and turned on again after it has warmed up, +α°C is decreased.

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 room temperature, kotatsu temperature, and the temperature control settings set by the person taking the temperature, and to provide optimal rapid heating. When using the kotatsu, simply turn on the kotatsu's power switch to obtain the highest heating speed, and the kotatsu can be sufficiently warmed up right away.Moreover, there is no need to operate the temperature control, making it convenient and hassle-free.

In addition, with this rapid heat control, even if the temperature is set to your preference, the output is at the highest scale, and it heats up to the temperature control set temperature + α℃ at once, so you can sufficiently warm not only the air inside the kotatsu but also the floor and futon at the beginning, making it comfortable. It is. Furthermore, when the initial temperature inside the room or the kotatsu is high, this +α°C also becomes small, and there is an effect of energy saving because the temperature does not change more than necessary.

This temperature of +α℃ makes a judgment to warm up to a high temperature when the room temperature is low or the kotatsu temperature is low, so it can be heated comfortably according to the human feeling of taking warmth. Summer. This does not result in a uniform +α℃ under any conditions, so
It's about being human.

[Brief explanation of the drawing]

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 a conventional example, and FIG. 6 is a temperature characteristic diagram of the same. 1... Heating element, 2... Temperature sensor, 8... Room temperature sensor, 9... Temperature control device.

Claims (1)

[Scope of utility model registration request] A heating element unit consisting of a heating element 1, a temperature sensor 2 for detecting the temperature inside the kotatsu, and a temperature control device capable of controlling the temperature inside the kotatsu to a set temperature using the signal from the temperature sensor 2. In an electric kotatsu, when the power is first turned on, the temperature inside the kotatsu is heated at the highest scale setting output until the temperature inside the kotatsu reaches the set temperature + α℃.
An electric kotatsu characterized by having a temperature control device 9 that automatically sets a temperature of +α°C determined by the initial temperature in the room or in the kotatsu at the time of starting electricity supply.