JPH0799711B2 - electric blanket - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to electric blankets, and in particular to control devices therefor.

2. Description of the Related Art A conventional electric blanket of this type, as described in Japanese Patent Application Laid-Open No. 59-87521, detects a human body by detecting a human body by a change in capacitance formed by a pair of electrodes arranged in a blanket body. And means for releasing the set temperature from the maximum temperature to the normal operating temperature by the change of the capacitance.

With the above configuration, preheating is controlled at the maximum temperature when the power is turned on, and when the user enters the floor, the human body is detected by changing the capacitance between the electrodes, and the set temperature is released from the maximum temperature and changed to the normal operating temperature. Was.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned configuration, the moisture content of the blanket body increases due to the influence of humidity after washing the blanket body or in the room and the bed, and the dielectric constant such as a water pillow, for example. If you place a large object on the blanket body, the capacitance will change, so you will erroneously detect the human body until the blanket body dries and the water content decreases, or until you remove the above object. There was a problem that the maximum temperature could not be set after the set temperature was released.

The present invention solves such a conventional problem, and an object of the present invention is to perform human body detection without malfunction even if the water content of the blanket body is increased or an object having a large electric conductivity is placed.

Means for Solving the Problems In order to solve the above problems, an electric blanket of the present invention has a detection unit including electrodes arranged on a blanket body and lead wires attached to the electrodes and a signal from the detection unit. Alternatively, if the power of a frequency range specific to the body motion or respiration of the human body exceeds a certain value, the floor is detected when a noise detection unit including a wireless output unit and a frequency analysis of the signal from the noise detection unit are performed. Entrance determination means for outputting a signal indicating
And a setting changing means for changing the temperature setting of the electric heater according to the signal from the bed entrance determining means.

Operation According to the present invention, when the human body enters the floor, the present invention detects the electrical noise component generated by the body motion and respiration of the human body to judge the human body entering the floor, and changes the set temperature.

Example Hereinafter, an example of the present invention will be described with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is an electric heater, 2 is a temperature detecting means for detecting the temperature of the electric heater 1, and the electric heater 1 and the temperature detecting means 2 are arranged in a blanket body 3.
Reference numeral 4 is a temperature setting means for setting the temperature of the electric heater 1, and 5 is a noise detecting means for detecting an electrical noise (artifact) generated by a floor entering operation. May be attached to. Numeral 6 is an entrance judging means for judging the entrance of the human body by the signal from the noise detecting means 5. Reference numeral 7 is a setting changing means for changing the set temperature of the electric heater 1 by a signal from the bed entry judging means 6 and the temperature setting means 4, and 8 is the electric heater by a difference between the signals from the setting changing means 6 and the temperature detecting means 2. It is the control means 8 for controlling the energization to 1. Temperature setting means 4, entrance determination means 6,
The setting changing means 7 and the control means 8 are mounted on the controller 9. Here, as shown in FIG. 3, the noise detecting means 5 outputs a signal from the detecting portion 5c consisting of the electrode 5a and the lead wire 5b accompanying it and a signal from the detecting portion to the entrance judging means by wire or wirelessly. And an output unit 5d for

In the above configuration, when the power is turned on, the temperature setting means 4
The preheating is started at a high temperature setting regardless of the preset temperature during sleep set in advance by the occupant. After that, when the occupant enters the bed, electrostatic induction occurs in the electrode 5a of the detection unit 5c and the lead wire 5c due to the movement of the human body due to body movement or respiration. This is well known, for example, as shown in FIG. 4, as noise caused by body movements and respiration of the subject at the time of measuring an electroencephalogram. In the present invention, this noise is focused on for detecting the entrance to the bed. It is a physical quantity. Such noise is output from the detection unit 5a to the entrance determination unit 6 via the output unit 5d in a wired or wireless manner. The entry determination means 6 analyzes the frequency of the input signal and outputs a signal indicating entry to the setting changing means 7 when the power in the frequency range specific to the body movement and respiration of the human body exceeds a certain value. . In the setting changing means 7, when the signal indicating the bed entry from the bed entering determination means 6 is input, the set temperature is changed to a desired set temperature during sleep which is set by the occupant in advance by the temperature setting means and controlled. The signal is output to the means 8. In the control means 8,
Energization of the electric heater 1 is controlled by the difference between the signal from the setting changing means 7 and the signal from the temperature detecting means.

Due to the above actions, it is not necessary to manually reset the setting scale when entering the bed, and even if you forget to switch to the proper temperature setting and fall asleep, you may wake up in the middle of sleep because it is hot. It has the effect that you can sleep comfortably and comfortably.

Effects of the Invention According to the electric blanket of the present invention, the following effects can be obtained: When a human body enters the floor, the electrical noise component generated by the body motion or breathing of the human body is detected to judge the human body entering the floor, and the set temperature is set. Since it is changed, the human body detection can be performed without malfunction and the set temperature can be switched.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric blanket according to an embodiment of the present invention, FIG. 2 is a block diagram of the electric blanket, FIG. 3 is a perspective view of noise detecting means of the electric blanket, and FIG. It is a characteristic view which shows the generated noise. 1 ... Electric heater, 2 ... Temperature detecting means, 3 ... Blanket body, 4 ... Temperature setting means, 5 ... Noise detecting means, 6 ...
Bed entry determination means, 7 ... setting change means, 8 ... control means,
9 ... Controller.

Claims (2)

[Claims] 1. A noise detecting means comprising a detecting section comprising electrodes arranged on a blanket body and lead wires associated therewith, and an output section for outputting a signal from the detecting section by wire or wirelessly, and the noise detecting section. From the admission determination means for performing a frequency analysis of the signal from the means and outputting a signal indicating admission when the power in a frequency range specific to human body movements and respiration exceeds a certain value, and the admission determination means An electric blanket having a setting changing means for changing the temperature setting of the electric heater in accordance with the signal of. 2. The setting changing means outputs a preset high temperature setting after the power is turned on, and when the bed entrance judging means judges that the human body has entered the bed, the user sets the temperature in advance by the temperature setting means. The electric blanket according to claim 1, which outputs the desired set temperature.