JPS6247526B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention is applicable to electrically heated blankets, lap blankets, bed sheets, carpets, dust jackets, cushions, floor mats, etc. that come into contact with the human body directly or indirectly through clothing. This relates to the temperature control unit of heating equipment used in various states.

<Prior Art> Conventionally, the temperature control section of a warming device suitable for sleeping, such as an electric blanket, has an AC power source 1, a heating element 2, and a first switching element that controls the energization of the heating element 2, as shown in FIG. 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 4, and serves as a power source for each circuit except the main circuit.

The DC power supply circuit 5 also includes a temperature detection circuit 7 that compares the temperature output of the heat sensitive body contributing to temperature detection with a set temperature set in a temperature setting resistor, and a temperature detection circuit 7 for supplying a gate signal to the thyristor 3. A first control circuit 8 is connected which controls the gate signal of the thyristor 3 using the output signal of the thyristor 3. In other words, since the temperature detection circuit 7 is configured to control the thyristor 3 and control the current to the heating element 2, if the user sets the temperature detection circuit 7 too high,
The patient was unable to sleep comfortably due to sweating that caused thirst and chest tightness.

<Purpose> Therefore, the present invention provides a heating device that can detect changes in humidity caused by sweating of the user and automatically lower the temperature of a predetermined area when the humidity exceeds a certain value to maintain comfortable usage. 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 and 3.

In FIG. 2, an AC power source 1 includes first and second heating elements 2a, 2b arranged in parallel to each other, and the heating elements 2.
A main circuit is configured by connecting thyristors 3a and 3b, which are first and second switching elements that control the energization of thyristors a and 2b. A DC power supply circuit 5 is connected in parallel to the series circuit of the heating elements 2a, 2b and thyristors 3a, 3b of the main circuit via a resistor 4, and serves as a power source for each circuit except the main circuit.

Also, in the DC power supply circuit 5, there is a heat sensitive element 6 (the resistance value changes depending on the temperature) that contributes to detecting the temperature of the entire blanket.
a temperature detection circuit 7 that compares the temperature output of the thyristor 3 with the set temperature set in the temperature setting resistor, and a thyristor 3.
The gate signals of the thyristors 3a and 3b are controlled by the output signal from the temperature detection circuit 7 for supplying the gate signals of the thyristors 3a and 3b, and the thyristor, which is the first switching element, is activated by turning on the triax 10, which is the third switching element described later. A first control circuit 8a that controls the gate signal of thyristor 3a (or both thyristors 3a and 3b) is connected thereto.

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

Figure 3 shows the body A of the warming device consisting of a blanket part, and the first heating element 2a is the part corresponding to the human chest, that is, the main body A.
The second heating element 2b is placed in the second part of the main body A corresponding to the feet of the human body.
Further, a heat sensitive element 6 for detecting the temperature of the heating device main body A, and a humidity sensor 9a 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 are arranged inside the blanket. It is set up. The first and second control circuits 8a, 8
b. The humidity detection circuit 9 is detected by the triax 10.
When the output of ), a correction device B is configured to correct the temperature by controlling it to turn on.

In the electric blanket having the above temperature control section,
For example, when the surface humidity of a certain part of the blanket is 40% or less,
The humidity is detected by the humidity detection device 9 through the humidity sensor 9a, and the triax 10 is turned off through the second control circuit 8b. At this time, if the blanket temperature is low, the first thyristor 3a and the first thyristor 3a are turned off by a signal from the first control circuit 8a. The second thyristor 3b is turned on, and 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 from the temperature detection circuit 7 to stop the gate signal of the first thyristor 3a and the second thyristor 3b, and the first thyristor 3a and the second thyristor 3b is OFF
However, 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 changes in humidity due to human sweating through the humidity sensor 9a, and when the humidity exceeds 70%, the second control is performed. The triax 10 is turned on through the circuit 8b, thereby controlling the first control circuit 8a, turning off the first thyristor 3a, and turning off the chest heating element 2.
The energization of a is stopped. Then, only the second thyristor 2b is turned on and off by the signal from the temperature detection circuit 7 through the first control circuit 8a, and only the foot heating element 2b is controlled.

Furthermore, when the humidity drops to below 40%, for example, this is detected by the humidity detection circuit 9 through the humidity sensor 9a, and the triax 10 is turned off through the second control circuit 8b to return to the original state. The thyristors 3a and 3b are turned on and off by a signal from one control circuit 8a.

As mentioned above, in this embodiment, sweating caused by incorrect setting of the set temperature is detected and corrected by automatically changing the heating area and amount of heat, thereby maintaining 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 individually heat the first and second parts of the heating device body, and the temperature of the heating device body. a temperature detection circuit that compares the temperature output of the heat sensitive element 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 detection circuit; a humidity detection circuit that includes a humidity sensor that detects the humidity of a predetermined portion of the heating appliance body; This device includes a correction device that controls the first or (and) second switching element to correct the temperature to lower it when the temperature exceeds a certain value.

Therefore, according to the present invention, by capturing the sweating phenomenon of the user caused by an error in setting the temperature setting and automatically correcting the heating area and heat generation amount, comfortable usage conditions can be maintained and usage caused by dehydration symptoms can be maintained. It is possible to provide a heating device that is highly safe and useful because it prevents danger to people.

[Brief explanation of the drawing]

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 thyristors, 4: Resistor, 5: DC power supply circuit, 6: Heat sensitive element, 7 : Temperature detection circuit, 8a: First control circuit, 8
b: Second control circuit, 9: Humidity detection circuit, 9a: Humidity sensor, 10: Triack.

Claims (1)

[Claims] 1. Temperature detection that compares the temperature output of the first and second heating elements that individually heat the first and second parts of the heating device body, and the temperature output of the heat sensitive body that detects the temperature of the heating device body, with a set temperature. a circuit, first and second switching elements that respectively control the currents of the first and second heating elements, and a first control circuit that controls the first and second switching elements using an output signal of the temperature detection circuit; a humidity detection circuit having a humidity sensor that detects the humidity of a predetermined portion of the heating device body;
When the humidity exceeds a certain value and the output of the humidity detection circuit exceeds a certain value, the first or (and)
A heating device comprising a correction device that controls a second switching element to correct the temperature lowering.