JP3299786B2 - electric blanket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blanket used as, for example, an electric blanket or an electric blanket.

[0002]

2. Description of the Related Art A conventional electric blanket, for example, an electric blanket, comprises a heater having a small calorific value and a heater having a large calorific value, as disclosed in the invention of Japanese Utility Model Application No. 60-140830 relating to a heating rug. Two heaters are wired to the base cloth, and a heater is selected and energized so that either an electric blanket or an electric carpet can be used. As shown in FIG. 6, a carpet heater 21 and a mat heater 31 are selectively energized by the controller 16.

[0003] An electric blanket or the like is a bed on which a person lays down and goes to bed. An sick or elderly person who cannot roll over and cannot move his or her body is located near the heater at the same place on the body. When the set temperature is increased, the base cloth temperature in the vicinity of the heater becomes, for example, 42.5 ° C. on the “high” scale and 35.5 ° C. on the “medium” scale,
The substrate temperature between heaters is approximately 35.5 ° C. on the “high” scale and approximately 30.0 ° C. on the “medium” scale.

The energizing time is one cycle on the "high" scale, 12 seconds on and 10 seconds off, and "1" on the "medium" scale.
Heating is repeated for 0 seconds and off for 12 seconds, and the same part of the skin is heated at a high temperature for a long time. Therefore, there is a problem that a person who cannot move his body easily suffers a low-temperature burn. On the other hand, in the above-mentioned known example, the heater can be simply switched from a carpet to a blanket, but the same portion of the body is heated for a long time, and it does not prevent a low-temperature burn. Was.

[0005] Unlike ordinary burns that occur instantaneously when exposed to hot water or fire, low-temperature burns are generally not used at all at low temperatures that are not considered to cause burns. It is known that this is caused by touching. In other words, unlike a normal burn, this low-temperature burn does not become instantaneous, but depending on the time of contact, the heat of the contacting part is not radiated to the outside but heats up, causing skin damage In addition, the symptoms are different from ordinary burns, in which only the surface of the skin is damaged, and the deep tissues of the skin are damaged, so that the symptoms are severe and the treatment is prolonged.

In particular, when a baby, an elderly person, or a disabled person who cannot move freely uses an electric blanket, an electric blanket, an electric carpet, or the like, the temperature is frequently adjusted. For example, there is a problem that a parent or guardian needs to be careful enough, and the operation is troublesome. Also, Japanese Patent Application Laid-Open No. Sho 62-1 discloses a floor heating device provided with a control device in which a plurality of heaters are arranged so as to divide the heating area, and the heaters are energized simultaneously or alternately.
The invention of No. 90330 has also been made, but also in this case, similarly to the case of the above-mentioned known invention, there is a problem that low-temperature burn cannot be prevented.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is intended that a human body be burned at a low temperature when an electric blanket such as an electric blanket provided with a plurality of heaters is used. It is an object of the present invention to provide an electric blanket that can prevent the occurrence of the electric blanket.

[0008]

According to another aspect of the present invention, an electric blanket according to the present invention is an electric blanket or an electric blanket using a plurality of heaters.
Number of heaters can be shared by
To, each other and electrically connected in parallel, sequentially have alternating rows by the ratio of power supply to these heaters certain time, the same parts
A person who uses a blanket by intermittently supplying electricity for minutes
The feature is to prevent low-temperature burns .

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view schematically showing an electric blanket which is an embodiment of the electric blanket of the present invention. First, this electric blanket is prepared by adding a heater [A] 2 and a heater [B] to a rectangular base cloth 1.
4 are wired in parallel at substantially equal intervals at an interval H, a temperature sensor 3 is provided between the heaters, and wires for these heaters [A] 2, [B] 4 and the temperature sensor 3 are connected. The temperature controller 5 is connected to the temperature controller 5 via the connector 11 and the cord 12 and controls the heater temperature.

The electric blanket of this embodiment is an example in which the heater length is 16 m and the electric power is 55 W, and the same heaters [A] 2 and [B] 4 are used. In this case, the intervals H between the heaters are almost equal, but in the case of head and foot heat, the heater intervals may be sequentially reduced from the head side to the foot side. In addition, temperature sensor 3
Is not particularly limited, but if possible, it is preferable to arrange the wiring between the heater [A] 2 and the heater [B] 4.

FIG. 2 is a sectional view showing a state in which a person 10 is lying on the electric blanket shown in FIG. 1 and is warming. The heater [A] 2 is energized and the heater [B] 4 FIG. 3 is a sectional view showing a state when the heater [B] 4 is energized and the heater [A] 2 is forcibly turned off. As can be seen from FIGS. 2 and 3,
The skin of the person 10 of the base cloth 1 on the heaters [A] 2 and [B] 4 is provided with a period in which each heater is forcibly turned off, so that the skin is rested from heating the heater for a certain period of time.

Further, as shown in the circuit block diagram of FIG. 4, the electric blanket circuit has two heaters [A] 2,
[B] 4, a temperature sensor 3 for detecting the temperature of the electric blanket by the two heaters [A] 2, [B] 4, and a control circuit for inputting a temperature signal of the temperature sensor 3 to an input terminal C. And output terminals A and B of the control circuit 8.
The switching power control elements [A] 6 and [B] 7 connected to the power control elements [A] 6 and [B] 7 are activated by the on operation of these heaters [A] 2 and [B] 4 The control circuit 8 adjusts the temperature, and energizes the heaters [A] 2 and [B] 4 from the commercial power supply 18 alternately at predetermined time intervals by a timing circuit (not shown). Things.

FIG. 5 shows a time chart of this energization, in which the heater [A] 2 and the heater [B] 4 are alternately set to 10 times.
The energization is performed every cycle, that is, a forced off period of 10 cycles is provided alternately. Here, in the case of the conventional electric blanket with one heater, the room temperature was set to 20 at the temperature setting “strong” scale.
The temperature of the base cloth on the heater at 4 ° C. is 47.5 ° C., and the temperature of the base cloth on the heater is 35.5 ° C. Second, and the temperature of the base cloth on the heater is 35.0 ° C.
The temperature of the base cloth between the heaters was 30 ° C., and the ratio of the time for turning on and off the current was about 10 seconds for on and about 12 seconds for off. In the blanket, the two heaters [A] 2 and [B] 4 are on the “strong” scale, the temperature of the base cloth on the heater is 40.5 ° C., the base cloth between the heaters is 35.5 ° C., and The energization time of one of them is alternately energized for about 10 seconds and off for 12 seconds at intervals of 10 cycles.

On the "medium" scale, the temperature of the base cloth on the heater is 32.0.degree. C., the base cloth between the heaters is 30.0.degree.
One of the two heaters [2] and [B] 4, for example, the heater [A] 2 is energized for 8 seconds on and 14 seconds off for 10 cycles alternately. For this reason, the power supply to the heater [A] 2 or the heater [B] 4 is switched, for example, about every four minutes with the same amount of heat generation per unit area. Can rest from heating for 4 minutes, during which time the temperature drops by 3 ° C. from 35 ° C. to 32 ° C.

That is, in this electric blanket, the time required for the heater to heat the human body is set to about half the time required for the conventional single heater wiring, and the temperature of the surface of the base cloth on the heater is reduced by one heater. The heating value per unit area is made lower than that of the case of the wiring, and is equal to that of the case of the conventional single heater wiring.
In the above embodiment, the electric blanket has been described. However, the present invention can be effectively applied to an electric blanket and the like.

Further, in this embodiment, two heaters having a heater wire length and a wattage which are conventionally used are used, and when these two heaters are initially energized, both of them are energized in the initial stage. Can be shortened. Furthermore, in this embodiment, two identical heaters are wired in parallel and energized alternately sequentially at a constant time according to a ratio. However, when two or more, for example, three heaters are wired and the ratio is changed, The present invention can also be applied.

[0017]

As described above, according to the electric blanket of the present invention, a plurality of heaters are wired in parallel to the base cloth at substantially equal intervals, and the heaters are energized sequentially and alternately. The heater heating time given to the same skin becomes shorter,
In addition, since there is a certain interval of time, it is possible to prevent a low-temperature burn while maintaining the heating effect.

Therefore, conventionally, for a baby, an elderly person, or a person with a physical disability, it is necessary to refrain from using an electric blanket or to take care of a parent, for example, to frequently adjust the temperature. On the other hand, the present invention has a great effect that the electric blanket can be used safely even by those who cannot move their bodies freely.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an electric blanket which is an embodiment of the electric blanket of the present invention.

FIG. 2 is a sectional view showing a state in which a person is warming up with the electric blanket of FIG. 1;

FIG. 3 is a sectional view showing a state in which a heater different from FIG. 2 is forcibly turned off among two heaters of the electric blanket of FIG. 2;

FIG. 4 is a circuit block diagram of the electric blanket of FIG. 1;

5 is an energization time chart for two heaters of the electric blanket of FIG. 1;

FIG. 6 is a schematic plan view of a conventional heating rug.

[Explanation of symbols]

 1 Base cloth 2 Heater [A] 4 Heater [B] 5 Temperature controller H interval

Claims (1)

(57) [Claims] An electric blanket using a plurality of heaters.
Is an electric blanket, wherein the plurality of heaters are
Place them side by side with a gap and electrically parallel to each other
Connect, sequentially row stomach alternately by the ratio of power supply to these heaters fixed time, such intermittent line energization of the same portion
Prevents low-temperature burns on blanket users
Electric blanket that was so.