JPS5987521A - Temperature control device - Google Patents

Abstract

PURPOSE:To warm up sufficiently an electric blanket at the time of going to bed, and thereafter, to switch automatically to a temperature being suitable for sleep by releasing a self-holding means by detecting whether a human body exists or not, and releasing the preheating, in the electric blanket, etc. CONSTITUTION:When a self-holding means 4 is operated, a set temperature of a temperature setting means 5 is released, and is set to the highest temperature. In this way, if a temperature of a temperature detecting means is low, a thyristor 8 is turned on by an operation of a controlling circuit 7, a heater 9 is made to conduct electrically, and the set highest temperature is held. When a user uses an electric blanket, a capacitance consisting of electrodes 1A, 1B placed on the electric blanket is varied, an oscillator 2 oscillates, and a detector 3 detects it, outputs a high level signal, and releases a quick heating circuit of the self-holding means 4. As a result, the blanket is switched automatically to a temperature being suitable for sleep, which is set by the temperature setting means 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a temperature control device for a heating device such as an electric blanket.

Prior art A conventional temperature control device of this type, for example, a temperature control device for an electric blanket, includes a temperature setting means such as a variable resistor that generally sets a predetermined normal operating temperature, and a temperature setting means that cancels the temperature setting by the temperature setting means and sets the temperature to a predetermined temperature. The blanket is configured to include a self-holding means that sets the temperature to the maximum temperature of the blanket and self-holds it, and a releasing means that releases the self-holding means as the temperature of the blanket body rises or as time passes.

With the temperature control device configured as described above, the self-holding means is released when the temperature of the blanket body rises or after a period of time has elapsed. If you use it with the camera on, the temperature will reach the predetermined normal operating temperature (relatively low temperature suitable for sleeping) set by the temperature setting means, so you won't feel warm and will feel uncomfortable when sleeping. There was a drawback that caused

OBJECTS OF THE INVENTION The present invention relates to a temperature control device aimed at eliminating the above-mentioned drawbacks.

EMBODIMENT OF THE INVENTION Hereinafter, an embodiment of the temperature control device of the present invention implemented as a rapid heating circuit for an electric blanket will be described with reference to the drawings.

In Fig. 1, 1 is the electrode LA and I arranged on the electric blanket.
B is a human body detection means that detects the presence or absence of a human body (user) by a change in capacitance (or impedance); (hereinafter abbreviated as O8C),
3 is a detector for detecting the operating state of oscillation or stoppage of the 08C2; 4 is a self-holding means that is released by a signal from the detector; 5 is a temperature setting means for the electric blanket, which is controlled by the self-holding means 4. be done. 6 is a temperature detection means of the electric blanket. Reference numeral 7 denotes a control circuit which is operated by signals from the temperature detecting means 6 and the temperature setting means 5 to control conduction of a switching element 8 (described below as SIRISK). Reference numeral 8 denotes a cyrisk that controls energization to the heater 9 . Reference numeral 9 denotes a heating heater disposed inside the electric blanket.

In Fig. 2, 3 is a detector, 4 is a self-holding means, 5 is a temperature setting means, 10.11 is a resistor, 12 is a diode, 1
3 is a resistor, 14 is an npn) run risk, 15. 16 is a resistor, 17 is a self-holding means (fast heating circuit), 4 a drive switch (a switch that closes and turns on only when it is pressed by a button-on switch), 18 .19 is resistance, 20.
21 is an npnl-run risk, and 22 is a temperature setting variable resistor (hereinafter referred to as a volume).

In FIG. 3, LA and IB form a pair of electrodes and are disposed within the electric blanket body, and the presence or absence of a human body is detected by changes in their capacitance.

In addition, in FIG. 3, the heater 9 disposed in the electric blanket and the heat sensitive body that senses the heat of the heater 9 are omitted, and the controller including the control circuit etc. is also omitted. .

Next, the operating state of the temperature control device configured as described above will be explained.

In addition, when the user turns on the self-holding means driving switch 17 to drive the self-holding means 4, the transistor 20 is turned off by turning on the switch 17, and the collector potential of the transistor 20 becomes a high level. Therefore, the transistor 14 is connected to the resistor 10. diode 12
A base current flows through the transistor 14, and the transistor 14 is turned on.

Depending on the on-operation of the transistor 14, the base current is not continuously supplied to the transistor 20, and the transistor 20 maintains the off-operation. By this operation, the self-holding means 4 is self-held.

Therefore, the base current is continuously supplied to the transistor 21, and the transistor 21 is continuously turned on.

By turning on the transistor 21, the temperature setting volume 22 is electrically short-circuited.

This means that the highest temperature is set regardless of the resistance value of the temperature setting volume 22.

Therefore, by turning on the self-holding drive switch 17, the electric blanket rises to the maximum temperature and maintains this temperature regardless of the set temperature. This means that the temperature detection means 6. Temperature setting means 5. Control circuit 7. Thyristor 8. This is done by the operation of the heater 9.

That is, if the temperature of the temperature detection means 6 is lower than the temperature of the temperature setting means 5 (maximum temperature in this case), the control circuit 7 operates to turn on the thyristor 8, and the shim heater 9 is energized, so that the temperature of the temperature detection means 6 increases. If the voltage is high, the thyristor 8 is turned off and the heater 9 is not energized.

This recombination maintains the set temperature (maximum temperature in this case).

When a human body (user) uses an electric blanket, the capacitance of the electrodes IA and IB arranged on the electric blanket changes, for example, 05C.
2 oscillates, and the detector 3 detects the oscillation state of the 05C2 and outputs a high level signal. The output signal of the detector 3 is applied to the base of the transistor 20 via the resistor 15, and the transistor 20 is turned on. When the transistor 20 is turned on, the base current of the transistor 14 is bypassed and turned off.The base current is supplied to the transistor 20, and the transistor m continues to be turned on and the transistor 14 is turned off. This action releases the self-holding means 4. When the self-holding means 4 is released, the transistor 21 is also turned off, and the voltage short circuit of the temperature setting volume 22 is also released. Therefore, when the self-holding means (fast heating circuit) is released, the temperature is set by the temperature setting volume 22, and the electric blanket maintains the temperature corresponding to the resistance value of the temperature setting volume 22.

Effects of the Embodiments of the Invention As explained above, the self-holding means drive switch 17 is turned on at the beginning of energization of the electric blanket, and the self-holding means (fast heating circuit) 4 is driven to preheat the electric blanket. In the past, the duration of preheating was controlled by temperature (temperature rise) and time (elapsed time, timer), so preheating is canceled after a certain period of time, and if you go to bed after that, it will be suitable for sleep. However, according to the present invention, the preheating effect is not sufficiently exerted due to the low temperature.
The electric blanket detects the presence or absence of a human body (detects sleeping), releases the self-holding means, and cancels preheating, so the electric blanket is sufficiently warm when sleeping, and then automatically switches to a temperature suitable for sleeping. You can sleep comfortably because of this.

Other Embodiments of the Invention In the above embodiments, the presence or absence of a human body was determined by detecting changes in capacitance, but changes in inductance or impedance may also be detected.

Effects of the present invention Since the temperature control device of the present invention has the above configuration,
Comfortable heating can be achieved using heating equipment.

[Brief explanation of the drawing]

Fig. 1 is a schematic block diagram of a circuit showing an embodiment of the temperature control device of the present invention, Fig. 2 is a specific circuit diagram of the main part of Fig. 1, and Fig. 3 is an example of the temperature control device of the present invention. It is an explanatory view of the arrangement state of the electrode of the electric blanket main body showing an example. In the drawing, 4 indicates self-holding means and 5 indicates temperature setting means 1
,

Claims (1)

[Claims] 1. Temperature setting means for setting a predetermined normal use temperature, self-holding means for canceling the temperature setting by the temperature setting means, setting the temperature to a predetermined maximum temperature, and self-maintaining it, and using the self-holding means for heating with an electric blanket, etc. 1. A temperature control device comprising a release means for releasing the temperature in response to use of the tool.