JPH0542793B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric blanket, and more particularly to a control device thereof.

Conventional technology Conventionally, this type of electric blanket is as shown in Fig. 5.
A blanket body 54 having an electric heater 51, a temperature detection means 52 for detecting the temperature of the electric heater 51, a human body detection means 53 for detecting the presence or absence of a human body by a change in capacitance, and a temperature setting for setting the set temperature of the electric heater. means 55; self-holding means 56 that sets the set temperature to a predetermined maximum temperature and self-holds it, and releases the self-holding in response to a signal from the human body detection means 53;
It was composed of a temperature detection means 52 and a control means 57 for controlling energization to the electric heater 51 based on a signal from a temperature setting means 55.

With the above configuration, when electricity is started, the self-holding means 56 maintains the set temperature at a predetermined maximum temperature to perform preheating, and when the human body detection means 53 detects that a human body enters the bed, the self-holding is canceled and the temperature is set. The energization was controlled by the set temperature of the means 55. (Japanese Unexamined Patent Publication No. 59-87521) Problems to be Solved by the Invention However, with this configuration, if the room temperature is low or the body temperature is low when going to bed or when going to bed after getting up in the middle of the day, , as shown in Figure 6,
When going to bed, cold air enters the bed and cold nightwear and the human body cool the bed, causing a problem in which the temperature in the bed drops and becomes inappropriate for falling asleep. Furthermore, due to such a drop in the temperature inside the bed, the person sleeping in the bed has to temporarily raise the temperature setting, which is a hassle, and if the person falls asleep with the temperature set high, he or she may feel hot and uncomfortable while sleeping. Then a problem arose.

The present invention solves the above-mentioned problems, and its purpose is to prevent the temperature inside the bed from decreasing as much as possible even after going to bed, and to promote falling asleep.

Means for Solving the Problems In order to achieve the above object, the present invention provides a blanket body provided with an electric heater and a temperature detection means for detecting the temperature of the electric heater, and a blanket body that sets a set temperature of the electric heater. environmental temperature detection means for detecting the room temperature in the bed on which the bed with the blanket is placed; human body detection means for determining the presence or absence of a human body in the bed on which the blanket body is placed; a timer that operates for a certain period of time after the human body detection means detects a human body; and when the timer is operating, the set temperature is corrected based on the output signal of the environmental temperature detection means; and a control means that controls energization to the electric heater based on the difference between the output signal of the temperature detection means and the output signal of the setting correction means. .

Effects According to the present invention, when the human body detection means detects a human body, the timer is activated for a certain period of time, and while the timer is activated, the set temperature is corrected according to the room temperature of the bedroom. That is, the lower the room temperature, the higher the set temperature is corrected to prevent the temperature in the bed from falling and to promote falling asleep. When the timer operation ends after a certain period of time, the set temperature is not corrected and energization is controlled at the set temperature.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, 1 is an electric heater, and 2 is a temperature detection means for detecting the temperature of the electric heater, which is disposed in the blanket body 3. 4 is a temperature setting means for setting the set temperature of the electric heater 1; 5 is a human body detection means for determining the presence or absence of a human body in the bed on which the blanket body is placed; 6 is in the bedroom where the bed on which the blanket body is placed is installed. 7 is a timer that operates for a certain period of time when the human body detection means 5 detects a human body; 8 is a timer that operates based on the output signal of the environmental temperature detection means 6 when the timer 7 is operating; Setting correction means that corrects the set temperature and does not correct the set temperature when the timer 7 is not operating; 9 is an electric heater based on the difference between the output signal of the temperature detection means 2 and the output signal of the setting correction means 8; 1
This is a control means for controlling energization to. The human body detection means 5 includes a storage section 3a for storing the signal of the temperature detection means 2 as shown in FIG. 3, and a storage section 3a for storing the current temperature and
a calculation unit 3b that calculates the difference between the temperature stored in the
It consists of a determining section 3c that determines the presence or absence of a human body based on the output signal of the calculating section 3b. The human body detection means 5 may have a simple structure such as a bed/wake-up switch.

The effects of the above configuration will be explained below.

When the user goes to bed, cold air enters the bed and cold nightwear and the human body cool the inside of the bed, so the temperature inside the bed decreases and the temperature of the electric heater 1 also decreases. Therefore, the human body detection means 5 calculates this temperature drop, and when the temperature decrease exceeds a certain value, it is determined that a human body is present. When the human body detection means 5 detects a human body, a timer 7 is activated for a certain period of time, and while the timer 7 is activated, the set temperature is corrected according to the room temperature of the bedroom. Here, the relationship between the correction value and room temperature is shown in FIG. That is, the lower the room temperature is, the larger the correction value is taken to correct the set temperature higher, thereby preventing a drop in the temperature in the bed and promoting falling asleep. When the room temperature is high, the correction value is small, so I have never experienced a situation where the temperature inside the bed becomes too high. The operating time of timer 7 is set to be enough time to fall asleep (10 to 20 minutes). timer 7
Once the operation has finished, the set temperature will not be corrected.
The energization is controlled at the set temperature set by the temperature setting means 4. FIG. 2 shows the temperature progression of the electric heater 1 during these series of operations. Compared to FIG. 5, which has already been explained as a conventional example, in the conventional example, there is no correction of the set temperature after entering the bed, so it is slow to reach the appropriate temperature level, but in this embodiment, the appropriate temperature level is quickly reached.

Due to the above action, according to this embodiment, when a human body enters the bed, the set temperature is corrected for a certain period of time according to the room temperature at that time, so even if the temperature inside the bed decreases when entering the bed, the temperature is quickly brought to an appropriate level. It is said to be effective in restoring the body and promoting sleep.
Also, because of the drop in the temperature inside the bed, there is no need to temporarily raise the temperature setting, and there are cases where you fall asleep with the temperature set high and end up feeling hot and uncomfortable while sleeping. It has the effect of allowing you to sleep comfortably.

Effect of the invention The electric blanket of the present invention has the following effects.

In other words, when a human body enters the bed, the set temperature is corrected for a certain period of time according to the room temperature at that time.
Even if the temperature inside the bed drops when going to bed, the temperature can be quickly restored to an appropriate level to promote falling asleep.

Also, because of the drop in the temperature inside the bed, there is no need to temporarily raise the temperature setting, and there are cases where you fall asleep with the temperature set high and end up feeling hot and uncomfortable while sleeping. It has the effect of allowing you to sleep comfortably.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an electric blanket in an embodiment of the present invention, Fig. 2 is an operational diagram of the electric blanket, and Fig. 3 is a block diagram of an electric blanket according to an embodiment of the present invention.
The figure is a block diagram of the human body detection means of the electric blanket, Figure 4 is a characteristic diagram showing the relationship between the correction value and room temperature, and Figure 5 is a diagram showing the relationship between the correction value and room temperature.
The figure is a block diagram of a conventional example, and FIG. 6 is an operation diagram of the conventional example. 1... Electric heater, 2... Temperature detection means, 3...
...Blanket body, 4...Temperature setting means, 5...Human body detection means, 6...Environmental temperature detection means, 7...Timer, 8...Setting correction means, 9...Control means.

Claims (1)

[Scope of Claims] 1. A blanket body provided with an electric heater and a temperature detection means for detecting the temperature of the electric heater, a temperature setting means for setting a set temperature of the electric heater,
an environmental temperature detection means for detecting the room temperature in the bedroom in which the bed with the blanket is arranged; a human body detection means for determining the presence or absence of a human body in the bed on which the blanket is arranged; a timer that operates for a certain period of time when the timer is activated, the set temperature is corrected based on the output signal of the environmental temperature detection means, and when the timer is not activated, the set temperature is corrected. An electric blanket comprising: a setting correction means that does not perform the correction; and a control means that controls energization of the electric heater based on a difference between an output signal of the temperature detection means and an output signal of the setting correction means. 2. The human body detection means includes a storage section that stores the signal of the temperature detection means, a calculation section that calculates the difference between the current temperature and the temperature stored in the storage section, and detects the presence or absence of a human body based on the output signal of the calculation section. The electric blanket according to claim 1, comprising a determining section for determining.