JPS62141464A - Electric 'kotatsu' - Google Patents

Abstract

PURPOSE:To save energy and to improve safety in an electric 'Kotatsu', by detecting the temperature in the 'Kotatsu' by a temperature sensor which is installed in an air a passage whether it is within the predetermined range of temperature or in the fluctuant state, and by controlling the temperature by a controller provided in the outside. CONSTITUTION:A temperature sensor 5 detects the temperature in a 'Kotatsu' whether it keeps a constant temperature or is in the fluctuant state. A controller which is provided in the outside processes the detected temperature and controls it to lower than the initially set temperature if the temperature in the 'Kotatsu' keeps a constant temperature. But when the temperature sensor 5 detects the fluctuant state in temperature because a person comes and opens a covering quilt to take warmth out of the 'Kotatsu' while the temperature in it is stabilized at a temperature lower than the initially set temperature, the controller controls to hold the temperature higher than the initially set temperature for a predetermined time, and then to lower it down to the initially set temperature.

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 TECHNOLOGY P The temperature inside the kotatsu of a conventional electric kotatsu was controlled as follows. 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 to monitor the temperature inside the kotatsu. Monitored by temperature sensor,
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: those that use a thermostat to directly control the energization of the heater, and those that measure the temperature with a semiconductor sensor and control the amount of energization to the heater using an electronic circuit. there were. 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, the temperature inside the kotatsu rises, 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 increases as follows. It worked to keep it constant after P.

Problems to be Solved by the Invention In the conventional technology as described above, the temperature of the electric kotatsu has a function to maintain the set temperature after it has warmed up to the desired temperature after turning on the switch. It was something.

As a result, the temperature inside the kotatsu always 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. A high temperature of 5 cm would have negative effects such as reducing safety and shortening the lifespan of each part.

In order to resolve the problems seen in the conventional example, the heating element unit using the air blower is installed at the bottom of the kotatsu. In cases such as when you are lying down and not moving at all, 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 temperature goes in and out of the kotatsu or moves inside the kotatsu. Depends on whether the temperature is stable.

Maintain or change the set temperature inside the kotatsu.

For example, if there is no one taking warmth, this can be solved by installing a temperature sensor in the air path of the heat generating unit, which allows another control circuit to control such things as lowering the temperature.

action ” The presence or absence of a person collecting heat can be detected using the second structure.

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

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

When the set temperature is reached, the power to the heater is controlled to keep it constant at the set temperature. here,
The air inside the kotatsu is sucked into the heat generating unit by the blower, and is then blown out using the inside as an air path, so the air inside the kotatsu is agitated 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?

I am trying to control whether the temperature is lower than the set temperature or raised by changing the set temperature.

As a result, when there is no one taking the heat, the kotatsu temperature is constant, so it is controlled to be lower than the set temperature, and since it is lukewarm than the set temperature and is changing during heating, the set temperature is 1
When the temperature sensor is installed in the air passage, the temperature sensor installed in the air passage measures the temperature of the air flowing through the air passage. Detects instability and controls 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 20 consisting of a fan 6 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 9. 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 66, and an air outlet 62 is provided at the outer periphery of the guard 66. 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. (a) shows the flow of air in the heating element unit 7 portion by the blower. 81 is a futon, and (b) shows the air flow of 7 P inside the kotatsu which is operating as a kotatsu. 9 kl: Control (flit controller) No. 1.1 from the temperature sensor 5 controls the energization 11 of 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 FIG. 2, the temperature characteristic of the conventional example is that when the kotatsu is heated for 1 u, the temperature of the kotatsu rises, and when the set temperature is reached, the temperature is maintained continuously.

In the present invention, the control process J in the external controller 9 first determines whether the temperature state of the temperature sensor 5 is maintaining a constant temperature or is changing and is in an unstable state. For example, if the temperature inside the kotatsu is constant, control σ1j is performed to lower the temperature to a lower temperature than the initially set temperature.

At this point, the temperature will be automatically controlled (H) 1) When the temperature is lowered to a temperature lower than the initially set temperature and stabilized, 9 For example, one person opens the futon and comes into the room to take warm temperatures. At times, the temperature inside the kotatsu becomes unstable, so if such an unstable state occurs in the temperature sensor 5, the temperature is maintained at a higher temperature than the initially set temperature for a certain period of time, and then the temperature is returned to the set temperature. Take control.

Effects of the Invention According to the present invention, the temperature of the kotatsu is controlled to maintain a constant temperature as in the conventional method, but the temperature of the kotatsu is further controlled by determining whether or not the temperature of the kotatsu is at a constant temperature. By controlling the kotatsu, when the temperature rises when the power is turned on or when one person is warming up, in other words, the movement of the kotatsu in and out changes the temperature of the kotatsu, and also changes the temperature inside the kotatsu due to the movement of people inside the kotatsu. A temperature sensor installed in the air path determines that the temperature is changing and is unstable, 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 nine people are not in the room, thereby saving 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.

In addition, if a person tries to warm up the kotatsu when the temperature of the kotatsu is automatically lowered when there are no other people in the room, the temperature inside the kotatsu will be disturbed by the warming operation, and the temperature sensor will detect this. When the temperature becomes unstable like this, the kotatsu is controlled to return to a higher temperature for a certain period of time than the preset temperature, so the kotatsu becomes lukewarm.

This is beneficial because it can sufficiently heat not only the internal air but also the futon and floor, allowing people who enter the room to warm up their cold bodies and reach a comfortable temperature.

[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 sectional view of the main parts of an electric kotatsu showing an embodiment of the present invention. It is a 0P main part sectional view showing the whole electric kotatsu showing one example. 1... Heater, 2... Air blower. 5... Temperature sensor, 6... Air path. 7. Heat generating unit.

Claims (1)

[Claims] A heating element unit (7) having an air blower (2) and a heater (1), and the heating element unit (7) attached to the lower part of the kotatsu are used to control the temperature inside the kotatsu and to control the airflow of the heating element unit (7). Depending on whether the air temperature flowing through channel (6) is maintained at a constant temperature or unstable, the temperature inside the kotatsu is
A temperature sensor that controls the temperature to be lowered to a certain level, and if an unstable change occurs when the lowered temperature is in a constant temperature state, the temperature inside the kotatsu is controlled to be higher than the preset temperature for a certain period of time. (5) into the air passage of the heating element unit (7) (
6) An electric kotatsu characterized by being provided with.