JPS6388778A - Electric carpet - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an electric carpet using a heat-sensitive heating element whose heating wire also serves as one temperature detection wire.

(Background Art) Figure 6 shows the structure of a sensor and integrated heater (3 thermal heating elements) used in electric blankets closely related to electric carpeters, where 1 is the core wire; A temperature detection wire 2 is wound thereon, a thermosensitive resin material 3 made of a plastic thermistor material is wrapped thereon, a heat generating wire 4 is wound on top of it, and an insulating jacket 5 is further covered on top of it. It is.

This heat-sensitive heat-generating body is a so-called one-wire heat-sensitive heat-generating body in which the heat-generating wire also serves as one of two temperature detection wires, which are originally required, and has advantages such as a simple structure.

Figure 7 shows a circuit diagram of a temperature control device using the above heat-sensitive heating element, and 2, 3.4 are the temperature detection lines in Figure 6,
The heat-sensitive resin material 2 shows the heating wire. The temperature control device shown in FIG. 7 controls voltage vAc of AC m RA C by resistor 6.
The temperature setting volume 7 and the thermosensitive resin material 3 divide the pressure, and when the partial pressure (a) reaches the overbreak voltage of the trigger element 8, the gate of the power control element 9 is triggered to apply half-wave current to the heating wire 4. I have to. In addition, Fig. 8 shows the external appearance of the fri air blanket, where A is a thermosensitive heating element and B l! The electric blanket body, C+, is the temperature controller.

Therefore, from the viewpoint of safety in temperature control, it is preferable that the B constant (thermistor constant) of the heat-sensitive resin material 3 is high, but as mentioned above, the heat-generating cotton 4 in the heat-sensitive resin material 3 is energized with half-wave current. When a DC component current flows through the ion-conducting positive f-Tsu thermistor material, which exhibits a low B constant, a polarization phenomenon occurs and changes over time. I could only use it:
However, in the case of such electric blankets, the heat generation is small, so even if they are used folded or partially insulated, the maximum temperature will not reach very high temperatures. iQ) material-specific inbidasis property, that is, the B constant at 60°C is 200
' The safety was sufficiently ensured.

By the way, if you try to use the same method fe as the above-mentioned electric blanket for an electric carpet, the calorific value of the electric carpet Y1 will be about 5＠ higher than that of the electric blanket (furthermore, the maximum setting temperature for the entire surface uniform temperature is also Because it is hotter than a blanket,
Temperature detection sensitivity (B constant), etc., which did not pose much of a problem with electric blankets, has come to the fore. In other words, when an electric carpet is used in a partially insulated state, the temperature rise in that part is large and it is necessary to keep the temperature within a safe range (
B constant from 60℃ to 80℃ is 8000'' to 12000
' This is because about K is required.

However, at present, there is no thermosensitive resin material that exhibits a large coefficient of coefficient other than the ion-conducting type plus 1 tuxer ξ star material. A so-called two-wire type device has been proposed in which a heating wire and a pair of temperature detection wires E are separately arranged as shown in FIG. That is, a thermosensitive resin material made of an ion-conducting +1 conductor ξ star material is placed between a pair of temperature detection wires 8, and the temperature detection wire E is separated from the heating wire side to apply a direct current component. 1.What was the unusual composition? In addition, in FIG. 9, τF is the electric carpet body, and G is the temperature controller section.

However, with this electric car bed, it generates heat (iL)
and two temperature detection wires E are required, so: ■ Many parts are required.

■A large number of f-spaces are required for wiring.

■Since the cap I) and the temperature detection line E are separated, the degree of heat generation cannot be detected accurately.

There were other drawbacks.

(Object of the Invention) The present invention has been proposed in view of the following two points, and its purpose is to: Use a heat-sensitive heating element with 11 #A glands and a temperature-sensing cotton tube. It is therefore an object of the present invention to provide an electric carpet which has a simple structure, and which also enables the use of an ion-conducting type Plus Deck mister material with a large B constant, thereby enabling safe temperature control.

(Disclosure of invention) Hereinafter, the present invention will be explained in detail with reference to the drawings showing examples.

FIG. 1 shows an embodiment of the heat-sensitive heating element H used in the present invention, in which a heating wire 11 is spirally wound around a core wire 10, and then a heat-sensitive resin material made of an ion-conducting plastic thermistor material is formed. 12, and further outside (
The temperature sensing cotton 13 is wound in a spiral shape, and a separation layer 14 and a body layer 15 are provided on the outer surface of the cotton.

Note that 15a indicates a thermal adhesive layer.

Fig. 2 shows an example of an electric carpet made of the above-mentioned heat-sensitive heating element (1) and a wiring pattern (1, t), which is applied to a heating area switching type.

FIG. 3 is an enlarged view of a part of the cross section of the heat generating unit I in FIG. Layer 20b.

A thermal adhesive layer 20e is provided on the outermost layer of the heat-sensitive heating element 1 and a thermal adhesive layer 20e is provided on one surface of the heat-uniforming sheet 20a. As shown in Fig. 2, a heating element unit I is made in which the outgoing path H and the incoming path H2 of the heat-sensitive heating element H are arranged almost parallel to each other when viewed from the connection part J of the electric carpet, and the surface material 21 is placed on both sides of the heating element unit I.
．． It is constructed by heat-pressing the backing material 22.

In addition, the outgoing path H and the incoming path H of the heat-sensitive heating element H when viewed from the connecting part J that is connected to the temperature controller part etc. of the electric carpet.
The reason why the wires 2 and 2 are wired almost in parallel is to prevent the obtained temperature signal from differing depending on the location where the partial adiabatic state occurs.

Next, FIG. 4 is a block diagram showing an embodiment of the electric carpet temperature control circuit of the present invention. In the figure,
Both ends of the heating wire 11 of the heat-sensitive heating element H are relay contacts S,...
The temperature sensing line 13 is connected to AC TiIltAC via S2, and both ends of the temperature detection line 13 are connected to each other and connected to one end of the power supply line by interlinking the current conversion element CT, and the output of the current conversion element CT is The signal is applied to a switching circuit 32 via a smoothing circuit 31, and a relay drive circuit 33 is operated by the output of the switching circuit ts32.

In addition, the output of the switching circuit 32 is output from the off-time timer 3.
4, and the IJ return of the relay drive circuit 33 is performed by an off-time timer 34. That is, during the period when the relay is mvhed by the operation of the switching circuit 32 and the relay contacts S, S2 are turned off, no signal is generated on the temperature detection line 13 and no temperature detection is performed, and the temperature appears to drop. Therefore, set an appropriate time with the off time timer 34,
During this time, the relay contacts S, S2 are kept off regardless of the operation of the switching circuit 32.

In operation, when the temperature of the heat-sensitive heating element H is low, the impedance of the heat-sensitive resin material 12 is high, and the temperature is detected from the generating I @ line 11 through the heat-sensitive resin material 12 by the interlinking line of the current conversion element CT. The current flowing to is small, and conversely, as the temperature rises, this current increases, and the output of this current conversion element CT is smooth! ! 5I31 converts it into a temperature signal. When the temperature rises and the temperature signal reaches a switching level corresponding to the set temperature, the switching circuit 32 performs a reverse operation, and the relay drive circuit 33 operates to turn off the relay contacts S, S2. There is. Thereafter, when the set time of the off-time timer 34 has elapsed, the relay contacts S, S2 are turned on, and the temperature is kept constant by repeating these operations.

Note that no DC component current flows through the heat-sensitive resin material 12, and it is possible to use an ion-conducting plastic thermistor material with a large B constant, making it possible to realize a safe electric carpet with high temperature detection sensitivity.

Furthermore, in the actual use of an electric carpet, it is conceivable that a heat insulating material such as a cushion is placed in a part of the electric carpet, and in the temperature control circuit shown in FIG. Since the voltage between the heating wire 11 and the temperature detection wire 13 is low, even if the temperature of the resin material 12 becomes high, the current flowing through the interlinking line of the current conversion element CT is small. , it may not work if you turn it off, but
As mentioned above, there is no problem because the outward and return paths of the heat-sensitive heating element H1 are wired almost parallel to each other when viewed from the connection part J of the electric carpet. That is, the outward journey and 1j1.
Because the FIs are located close to each other in parallel,
This is because the voltage between the heat generating line 11 in the thermosensitive heating element H and the temperature detection line 13 becomes approximately constant when both are averaged. As a result, the temperature does not rise abnormally only on the interlinking line side of the current converting element CT when it is insulated, and if the temperature of the heat-sensitive heating element H is the same no matter where it is insulated, almost the same current will be converted into the current. Flows through the interlinkage line of element CT, in other words,
No matter which part is insulated, the temperature can be controlled to be almost the same, making it possible to obtain an electric carpet with excellent safety and heating sensation.

Note that the heat-sensitive heating element H is not limited to that shown in FIG. 1, but may be tape-shaped as shown in FIG. 5, and is not limited to any particular structure. In FIG. 5, 16 is a heating wire, 17 is a thermosensitive resin material, 18 is a temperature detection wire, and 19 is an insulating layer.

Similarly, the wiring pattern is not limited to that shown in Fig. 2, but also includes wiring patterns in which only the interlinking line side of the current conversion element CT is prevented from heating up intensively when partially insulated. Needless to say.

(Effects of the Invention) As described above, in the present invention, a negative characteristic ion-conducting plastic thermistor material j: a thermosensitive heat generating wire having a heat generating wire and a temperature sensing wire coupled through a thermosensitive resin material. a heat-generating unit in which the heat-sensitive heat-generating element is arranged in an outward path and a return path substantially parallel to each other when viewed from a connecting portion of the electric carpet; and an alternating current flowing from the heat-generating wire to the temperature detection wire via the heat-sensitive resin material. Since it is equipped with a temperature control circuit that performs control based on current, (a) ion-conducting heat-sensitive resin material with a large constant can be used, so the maximum temperature can be lowered and there is no risk of low-temperature burns. We can provide safe electric carpet.

(b) Since the sensitivity of temperature detection is uniform no matter which part is insulated, control can be performed to prevent abnormally high temperatures.

(8) Since direct current does not flow through the thermosensitive resin material, the impedance characteristics do not change over time and are highly safe.

(d) Since it is a one-wire system, wiring is easy.

(e) Since it is a one-wire system, the length of the electric conductor wire used can be short.

(F) Since the emitting N line and the temperature detection line are close to each other, the temperature of the exothermic line can be directly detected, and abnormalities can be detected accurately.

There are other effects.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the heat-sensitive heating element applied to the electric carpet of the present invention, Fig. 2 is an example of a wiring pattern using the heat-sensitive heating element, and Fig. 3 is a partial cross-section of Fig. 2. figure,
Fig. 4 is a block diagram showing one embodiment of the temperature cave circuit, Fig. 5 is a block diagram showing another embodiment of the thermosensitive heating element, and Fig. 6 is a thermosensitive heating element used in a conventional electric blanket. Configuration diagram, @7
The figure is a circuit diagram of the temperature cave device, FIG. 8 is an external view of an electric blanket, and FIG. 9 is a configuration diagram of a conventional two-wire electric carpet.

Claims (1)

[Claims] A thermosensitive heating element has a heating wire and a temperature detection wire connected through a thermosensitive resin material made of an ion-conducting plastic thermistor material with negative characteristics, and this thermosensitive heating element is connected to the outgoing path when viewed from the connection part of the electric carpet. It is characterized by comprising a heat generating unit whose return paths are arranged substantially in parallel, and a temperature control circuit that performs control based on an alternating current flowing from the heat generating line to the temperature detection line via the heat sensitive resin material. Electric carpet.