JPS6090515A - Warmth taking instrument - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Technical Field> The present invention is applicable to electrically heated blankets, lap blankets, bed sheets, carpets, vests, cushions, floor mats, etc. that are directly attached to the human body or indirectly by applying them to clothing. The present invention relates to a temperature control unit of a warming device that is used in contact with a heating device.

<Prior Art> Conventionally, as shown in FIG. 1, the temperature control section of a heating device suitable for sleeping, such as an electric blanket, has an AC power source 1, a heating element 2, and a first switching device that controls the energization of the heating element 2. Thyristors 3, which are elements, are connected in series to form a main circuit.

A DC power supply circuit 5 is connected in parallel to the series circuit of the heating element 2 and the thyristor 3 of this main circuit via a resistor 1, and serves as a power source for each circuit except the main circuit.

In addition, the DC power supply circuit 5 includes a temperature detection circuit 7 that compares the temperature output of the heat sensitive body that contributes to temperature detection with the set temperature set in the temperature setting resistor, and a temperature detection circuit 7 that is used to supply gate signals to the thyristor 3. A first control circuit 8 that controls the gate signal of the thyristor 3 using an output signal from the thyristor 3 is connected thereto. In other words, since the temperature detection circuit 7 controls the thyristor 3 to control the current to the heating element 2, if the user sets the temperature detection circuit 7 too high, the user may experience thirst and chest pain due to sweating. There were times when I was unable to get a comfortable night's sleep due to the discomfort.

Therefore, the present invention aims to provide a heating device that detects changes in humidity due to sweating of the user and automatically lowers the temperature of a predetermined area when the humidity exceeds a certain value, thereby maintaining comfortable usage conditions. intended to provide.

<Example> Hereinafter, an example in which the present invention is applied to an electric blanket will be described based on FIGS. 2.3.

@2 In Figure 2, first and second heating elements 2a and 2b are arranged in parallel to each other in an AC power source 1, and the heating element 2a.

Thyristors 3a and 3b, which are first and second switching elements that control energization of 2b, are connected to form a main circuit. The heating element 2a of this main circuit.

A resistor 4 is connected in parallel to the series circuit of 2b and thyristors 3a and 3b.
A DC power supply circuit 5 is connected through the circuit, and serves as a power source for each circuit except the main circuit.

In addition, the DC power supply circuit 5 includes a temperature detection circuit 7 that compares the temperature output of a heat sensitive element 6 (the resistance value of which changes depending on the temperature) that contributes to detecting the temperature of the entire blanket and a set temperature set in a temperature setting resistor, and a temperature detection circuit 7 that 3a.

The gate signal of the thyristors 3a and 3b is controlled by the output signal of the temperature detection circuit 7 for supplying the gate signal of the thyristor 3b, and the thyristor 3a, which is the first switching element, is turned on by turning on the triac 10, which is the third switching element, which will be described later.
(Or both thyristors 3a.

A first control circuit 8a for controlling the date signal of 3b) is also connected.

Further, in parallel with the temperature detection circuit 7, the DC power supply circuit 5 includes a humidity detection circuit 9 having a humidity sensor 9a contributing to humidity detection, and a triac 10 which is a third switching element.
A second control circuit 8b that controls the gate signal of the triac 1o with a signal from the humidity detection circuit 9 is connected, and the temperature detection circuit 7 and the first control circuit 8
The triac 10 is connected between a.

Figure 3 shows a heating device main body A consisting of a blanket part, in which the first heating element 2a is arranged at the part corresponding to the human body's chest, that is, the first part of the main body A, and the second heating element 2b is arranged at the part corresponding to the human body's feet, that is, the main body A. placed in the second part.

Also, a heat sensitive element 6 for detecting the temperature of the heating device main body A, and a humidity sensor 9 for detecting humidity located in a predetermined part of the blanket, that is, an intermediate part between the human body chest corresponding part and the foot corresponding part.
a is placed inside the blanket.

The first and second control circuits 3a, 81. , when the output of the humidity detection circuit 9 exceeds the north constant value (for example, a value corresponding to 70% humidity) by the trigger 10, the first thyristor 3a (or the first and second thyristors 3a,
3 Turn b) off and set the lower constant value (for example, 40% corresponding value)
A correction device B is configured to correct the temperature by controlling it so as to turn it on at .

In the electric blanket having the temperature control section described above, when the surface humidity of a predetermined part of the blanket is, for example, 40% or less, the humidity is detected by the humidity detection device 9 through the humidity sensor 9a, and the triac 10 is detected through the second control circuit 8b. Turn it off,
At this time, if the blanket temperature is low, the first thyristor 3a and the second thyristor 3bj are activated by a signal from the first control circuit 8a.
, tONL, the foot heating element 2b and the chest heating element 2a are energized. When the blanket temperature reaches a certain set temperature, the first control circuit 8a is controlled by the signal sent to the temperature detection circuit 7, and the first thyristor 3a and the second thyristor 3
The date signal of b is stopped, the first thyristor 3a and the second thyristor 3b are set to 0FFL, and the power supply to the heating elements 2a and 2b is stopped. This operation is repeated to keep the blanket temperature constant.

Here, if the set temperature of the temperature detection circuit 7 is too high, the humidity detection circuit 9 detects the humidity change due to human sweating through the humidity sensor 9a, and when the humidity exceeds, for example, 7°0%, the second The triac 1o is turned ON through the control circuit 81) of the first control circuit 81).
a is controlled, the first thyristor 3a is turned off, and the energization of the chest heating element 2a is stopped. Then, only the second thyristor 2b is ON, OFFFL, and the foot heating element 2b is controlled by the signal from the temperature detection circuit 7 through the first control circuit 8a.

Furthermore, when the humidity drops to, for example, 40% or less, this is detected by the humidity detection circuit 9 through the humidity sensor 9a, and the triac 10 is turned off through the second control circuit 8b to return to the original state. The signals from the control circuit 8a turn ON and OFF3 the Cyrisks 3a and 3b.

As mentioned above, in this embodiment, sweating caused by a mistake in setting the temperature is detected and corrected by automatically changing the heating area and amount of heat, thereby maintaining a comfortable sleep and reducing the risk of dehydration in the human body. The safety and usefulness are increased because the dangers of the above are prevented.

<Effects> As is clear from the above description, the present invention detects the temperature of the first and second heating elements that independently heat the first and second parts of the heating device body, respectively, and the temperature of the heating device body. a temperature detection circuit that compares the temperature output of the heat sensitive body with a set temperature; first and second switching elements that respectively control the currents of the first and second heating elements; a first control circuit that is controlled by an output signal of the heating device, a humidity detection circuit that has a humidity sensor that detects the humidity of a predetermined part of the heating appliance body, and a humidity detection circuit that controls the output of the humidity detection circuit when the humidity exceeds a certain value and a correction device that controls the first or (and) second switching element to correct the temperature when it exceeds the temperature.

Therefore, according to the present invention, by capturing the user's sweating phenomenon caused by an error in setting the set temperature and automatically correcting the heat generating area and heat generation amount, comfortable usage conditions can be maintained and the user can be relieved of symptoms of dehydration. Since this prevents the risk of injury, it is possible to provide a heating device that is highly safe and useful.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of a conventional heating device, Fig. 2 is an electric circuit diagram of an electric blanket showing an embodiment of the present invention, and Fig. 3 is an electric circuit diagram of a heating element, a heat sensitive element, and a humidity sensor in the electric blanket. FIG. 3 is a plan view showing the arrangement. A: Warming device, B: Correction device, 2a, 2b: First and second heating elements, 3a, 3b: First and second cyrisks,
4: Resistor, 5: DC power supply circuit, 6: Heat sensitive element, 7: Temperature detection circuit, 8a: First control circuit, 8b: Second control circuit, 9
: Humidity detection circuit, 9a: Humidity sensor, 10: Triac. Applicant Sharp Corporation Agent Tsunehisa Nakatoshi

Claims (1)

[Claims] A temperature detection circuit that compares the temperature output of a first and second heating element that individually heats the first and second parts of the heating device body, and a temperature output of a heat sensitive body that detects the temperature of the heating device body, with a set temperature. a first and second nitswitching element that respectively control the currents of the first and second heating elements; a first control circuit that controls the first and second nisswitching elements using an output signal of the temperature detection circuit; and the heating appliance. a humidity detection circuit having a humidity sensor that detects the humidity of a predetermined portion of the main body; and a first or (and) second switching when the humidity exceeds a certain value and the output of the humidity detection circuit exceeds the certain value. A heating device comprising a correction device that controls an element and corrects it to lower the temperature.