JPH01225837A - Electric planar heater - Google Patents

Abstract

PURPOSE:To enhance operability of a high temperature setting switch and prevent malfunctions, by providing an operating part of a switch means on the back side of a temperature controller in the state of being recessed from a back surface of the controller, in the title heater such as an electrically heated carpet. CONSTITUTION:An operating part 14 of a high temperature setting switch 6 incorporated in a temperature controller 4 is provided on the back side of the controller 4, with the tip of the operating part 1 recessed from a back surface of the controller 4. When a main body 1 of a carpet is folded in two with a heating surface A on the inner side and the operating part 14 of the switch 6 of the controller 4 is to be slide to a high temperature setting side for, for example, killing mites, the operating part 14 is exposed to the outside, so that operability is enhanced, and malfunction can be prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to electric surface heating devices such as electric carpets.

2. Description of the Related Art An electric carpet will be explained as an example of a conventional electric surface heating device of this type.

FIG. 7 is an external perspective view of an electric carpet having a temperature controller 4 in one corner. (not shown), and the surface of the temperature controller 4 is equipped with a temperature setting section 5 for setting the surface temperature from the outside, and a high temperature setting switch 6 for fixing the surface temperature at the maximum setting temperature and energizing. It was configured.

Problems to be Solved by the Invention However, with this conventional configuration, there is no problem when the user uses the temperature setting section 5 to adjust the surface temperature of the carpet body 1 to a desired temperature and performs normal heating, but other than that, there is no problem. Then, fold the carpet body 1 approximately in half with the heating side A inside as shown by the dashed line, and operate the high temperature setting switch 6 to set the temperature of the carpet body 1 to the highest setting temperature and turn on the electricity. When using it for the purpose of killing mites on the heating surface A, there were the following problems.

In other words, in order to kill mites in a short time, it is desirable to have a higher temperature state, so the electric carpet body 1 is folded approximately in half with the heating side A facing inwards, and electricity is applied at the highest set temperature. .

However, if the carpet body 1 is folded in half with the heating side A inside, the temperature controller 4 will be covered by the folded carpet body 1, and the front side of the controller 4 will be inside, so the high temperature setting switch 6 must be operated. To get down, I had to flip up one of the folded carpet books, C+1.

In addition, in the conventional configuration, the high temperature setting switch 6 is located on the surface of the controller 4 under normal heating conditions, so it is easy to operate. There was a risk of low-temperature burns caused by collecting heat.

Therefore, the present invention is intended to facilitate the operation of the high temperature setting switch when the carpet body is folded approximately in half, and to prevent erroneous operation of the high temperature setting switch during normal heating.

Means for Solving the Problems and Technical Means of the present invention for solving the above problems is to install the operating section of the high temperature setting switch on the back side of the temperature controller.

For production The effect of this technical means is as follows.

When the carpet body is folded with the heating side inside,
Since the operation part of the high temperature setting switch is located on the back side of the temperature controller, the high temperature setting switch can be operated in the folded state.

Also, in normal heating conditions, the operation part of the high temperature setting switch is on the back side of the temperature controller, so it may not be operated by mistake.
You can prevent this from happening.

Example An embodiment of the present invention will be described below based on the accompanying drawings.

FIG. 2 is an external perspective view of an electric carpet according to an embodiment of the present invention, and FIG. 3 is an external perspective view of the back side of the temperature controller 4.

Reference numeral 1 denotes a carpet body in which a heating element 2 and a temperature sensing element 3 are disposed on a heat insulating material 9 and covered with a car vent surface cloth 8. A temperature control unit 10 (not shown) is installed inside one corner of this carpet body 1. A temperature controller 4 made of a hard synthetic resin case is installed, and the front side of the temperature controller 4 is equipped with a temperature setting part 5 and a power switch 7 that can be operated from the outside, and a third one is installed on the back side 1a. As shown in the figure, the high temperature setting switch operating portion 14 is recessed in the recess 4a.

FIG. 1 is a side view with main parts of the temperature controller 4 cut away.

An operation part 14 of a high temperature setting switch 6 built into the temperature controller 4 is provided on the back surface, and its tip is recessed from the back surface of the temperature controller 4.

FIG. 4 shows a schematic circuit diagram of the 7E air carpet.

One end of one electrode of the temperature sensing element 3 is connected to a temperature control unit 10 including a relay 11 that turns on and off the power to the heating element 2, and the other end is connected via a fixed resistance for temperature setting 13 and a variable resistance for temperature setting 12. Connected to the power line. Further, a high temperature setting switch 6 is connected in parallel to the temperature setting variable resistor 12.

This high temperature setting switch 6 is open during normal use and closed when high temperature is set.

Next, the operation of the electric carpet constructed as described above will be explained.

In normal heating, the carpet main body 1 is spread out as shown in FIG. 2, and the person taking the warmth sets the carpet main body 1 to a desired temperature using the temperature setting section 5. At this time, the high temperature setting switch 6 is in an open state in order to set the high temperature setting switch 6 to the normal use side. The temperature of the carpet body 1 is set by the composite value of the temperature setting variable resistor 12 and the temperature setting fixed resistor 13 according to the strong to weak signal from the temperature setting section 5, and the n1 temperature setting variable resistor 12 is set to O ohm. By doing so, the temperature of the carpet body 1 can be set to the maximum set temperature.

Next, if you want to kill the dust mites attached to the electric carpet, fold the carpet body 1 approximately in half with the heating side A inside as shown in FIG. 5, and operate the high temperature setting switch 6 on the back side of the temperature controller 4. Slide part 14 to the high temperature setting side.

As a result, the high temperature setting switch 6 is closed, and the temperature setting variable resistor 12 is short-circuited. Control the temperature of 1.

Turn the high temperature setting switch 6 into the temperature controller 4 as shown.
By installing it on the back side of the carpet, when the carpet main body 1 is folded in half with the heating side A inside, the operation part 14 of the high temperature setting switch is on the outside, making it easier to operate and improving usability. In this case, the operation part 14 of the high temperature setting switch 6 is located on the floor side, so that it can be prevented from being operated by mistake.

In addition, since the operation part 14 of the high temperature setting switch 6 is recessed from the back side of the temperature controller 4, it will not touch the floor even when the carpet body 1 is unfolded during normal use, and small irregularities on the floor surface will be avoided. There is less possibility that the high temperature setting switch 6 will be operated erroneously due to slipping of the car vent main body 1 or the like.

Next, another embodiment 1 of the present invention will be explained.

FIG. 7 shows a schematic circuit diagram of the embodiment of the pond.

In the temperature setting section 5, a temperature sensing element protection resistor 15 having a resistance value much smaller than that of the high temperature setting switch 6 and the temperature setting fixed resistor 13 is connected in parallel to the series part of the temperature setting variable resistor 12 and the temperature setting fixed resistor 13. are connected.

When the high temperature setting switch 6 is in the open state (that is, during normal heating), the temperature of the carpet body 1 is set by the composite value of the temperature setting variable resistor 12 and the temperature setting fixed resistor 13 in accordance with the signal from the temperature setting section 5 as described above. However, when the high temperature setting switch 6 is in the closed state (that is, when the high temperature is set), the temperature of the carpet body 1 is controlled by the temperature setting variable resistor 12 and the temperature setting fixed resistor 13.
Regardless of the value of , the temperature is set higher than the maximum setting temperature during normal heating depending on the value of the temperature sensor protection resistor 15, so that it becomes possible to kill the mites more quickly and reliably.

Effects of the Invention As described above, in the present invention, the operating section of the high temperature setting switch that fixes the surface temperature of the foldable carpet body to the maximum set temperature of the temperature setting section is installed on the back side of the temperature controller, so that heating can be done easily. When folded approximately in half with the side facing inward, the high temperature setting switch is on the outside, making it easier to use and saving the effort of flipping the carpet itself.

In addition, during normal heating, the high temperature setting switch is on the floor side, which prevents accidental operation. Furthermore, the operation part of the high temperature setting switch is recessed below the surface of the temperature controller, so it is easy to use during normal heating. At times, even when the carpet body is unfolded, it does not touch the floor (this reduces the possibility of incorrectly operating the high temperature setting switch due to small irregularities on the floor surface or slipping of the carpet body, and avoids low-temperature burns. Can be used safely.

[Brief explanation of the drawing]

Fig. 1 is a side view of a temperature controller for an electric carpet according to an embodiment of the present invention, with main parts cut away, Fig. 2 is an external perspective view of the electric carpet, and Fig. 3 is a back view of the temperature controller for the electric carpet. Fig. 4 is a schematic circuit diagram of the electric carpet; Fig. 5 is an external view of the electric carpet folded approximately in half; Fig. 6 is a schematic diagram of an electric carpet according to another embodiment of the present invention. The circuit diagram and FIG. 7 are external perspective views of a conventional electric carpet. 1...Car vent body, 4...Temperature controller, 4m...Recess, 5...Temperature setting section, 6...High temperature setting switch (switch means), 10...temperature control section, 14...
・Operation section. Name of agent: Patent attorney Toshio Nakao (No. 4)
Figure 5 Do-depart I/! , body 17 figure l

Claims (2)

[Claims] (1) a foldable main body having a temperature controller in one corner; a temperature control section that is built into the temperature controller and controls the surface temperature of the main body; and a temperature setting section that sets the surface temperature of the main body from the outside; and a switch means connected to the temperature control section to fix the surface temperature of the main body to the maximum setting temperature of the temperature setting section, an electric surface shape having an operating section of the switch means installed on the back side of the temperature controller. Warming equipment. (2) The electric surface heating device according to claim 1, wherein the operating portion of the switch means is recessed from the back surface of the temperature controller.