JPS5938655Y2 - electric carpet - Google Patents

Description

[Detailed explanation of the invention] The present invention relates to improvements to electric carpets that are used by laying them on floors, etc. Conventionally, electric carpets have been installed due to differences in the shape of the room, the position of furniture, etc., and the surface on which they are laid. There are cases where it is not possible to install an electric carpet, such as in cases where there is a difference in height, such as in a hori-kotatsu.To solve these various problems, the electric carpet can be divided into separate carpet units each having a small area. An electric carpet has been proposed that can be electrically connected in parallel via a connecting device and used in various ways depending on the purpose.

However, this type of electric carpet is configured to control the surface temperature to a set temperature by using temperature-dependent changes in resistance of heat-sensitive wires installed in individual units.

Therefore, if you connect individual units, the heat-sensitive wires will be electrically connected in parallel accordingly, and this parallel connection will change the combined resistance of the heat-sensitive wires regardless of the temperature.
There was a drawback that the temperature was controlled differently depending on the number of units connected.

The present invention was devised in view of the above-mentioned drawbacks of the conventional electric carpet, and has been developed to solve the above-mentioned drawbacks. A correction impedance is provided to initially set the combined resistance value of the hot wire to a predetermined resistance value, and it is possible to control the surface temperature of all units with the attached controller so that the surface temperature of all units is the same regardless of the number of electrically connected units. This provides an electric carpet that provides stable heating.

Embodiments of the present invention will be described below based on the drawings.

In Fig. 1, 1 to 3 are electric carpet units;
These combinations constitute the entire electric carpet A.

a is a connection pin receiving part provided at a predetermined position of each unit as an electrical and mechanical connection device of the electric carpet units 1 to 3, and has a built-in correction impedance according to the present invention; A connecting pin receiver is provided at a predetermined position of the unit 1 and is electrically and mechanically connected to a pin-equipped plug 9 to be described later.

5 is a connecting pin provided at a predetermined position of each of the units 2 and 3 in order to enable electrical and mechanical connection of the adjacent units 1 to 3 as a connecting device corresponding to the connecting pin receiving part a; A heat transfer layer with good heat transfer properties forming the upper layer of the units 1 to 3; 6 a heat insulating layer facing the heat transfer layer 5 and forming the lower layer of the units 1 to 3; 7 a heat transfer layer forming the lower layer of the units 1 to 3; A heating wire 8 is interposed between the heat insulating layer 6 and the heat transfer layer 5 and electrically connects the connection pin receiving portion a and the connection pin b;
A heat-sensitive wire that senses the heat is electrically connected to the connecting pin receiving part a and the connecting pin b, and is interlocked with a temperature control device (not shown).

Reference numeral 9 denotes a plug with a pin that is provided at a predetermined position of a specific unit 1 and is electrically and mechanically connected to the connection pin receiver a/ to connect the heat generating wire 7 and the heat sensitive wire 8; 10a is a temperature control dial provided on the controller 10; be.

In addition, FIG. 2 shows the position and approximate shape of the connecting pin receiving part a1 of the connecting pin b in the electric carpet unit 2.3, and in the figure, by inserting the pin b into the pin receiving part a, Units 2 and 3 are mechanically connected and electrically connected in parallel.

The heat-sensitive wire 8 according to the present invention will be explained in more detail with reference to FIG.
The core material 22 wound around the conductor 24a covers the conductor 24a.
a plastic sensor made of nylon or the like wrapped around b;
23 is an electrical insulator that further covers the conductor 24b,
The heat-sensitive wire 8 is constructed by combing these into a linear shape.

The plastic sensor 22 is made of, for example, nylon, and has a characteristic that its impedance changes with temperature, and as shown in the graph of FIG. 4, the amount of impedance decreases as the temperature rises.

Therefore, if a voltage is applied between the respective conductors 24a and 24b wound through the plastic sensor 22, the temperature change I of the electrothermal layer 5 will cause the difference between the respective conductors 24a and 24b of the heat-sensitive wire 8. The voltage changes, and 11 voltage comparators detect this change in voltage to turn on and off the power supply circuit.

FIG. 5 is a diagram showing a basic electric circuit between the carpet unit and the controller circuit, where Z is the already mentioned correction impedance incorporated in the electric circuit of the units 1 to 3 (indicated by a dashed line in the figure); is the conductor 2 of the heat-sensitive wire 8
This is a voltage comparator that compares the voltage VB, which varies depending on the resistance between 4a and 24b, with the reference voltage VA.

In addition, 12 is an amplifier, 13 is a relay contact for turning on and off the power supply circuit, and 14 is a power supply.

In the electric carpeller H having such a configuration, as shown in the first diagram, the adjacent units 1 to 3 are connected by the connecting pin receiver a and the connecting pin b, and the pin plug 9 is connected to the connecting pin receiver a of the unit 1. ', then insert the plug into an outlet (not shown) and apply a voltage. At the beginning of energization, the temperature of the heat-sensitive wire 8 is low and the impedance between the conductors 24a and 24b is a dog.

At this time, the voltage comparator 11 is excited and the relay contact 13 is closed so that VA voltage<VB lightning voltage and its output becomes Hi, so that power is supplied to the heating wire 7 from the relay coil.

On the other hand, when the current continues and the carpet temperature reaches the set temperature, the impedance between the conductors 24a and 24b of the heat-sensitive wire 8 decreases, and the voltage comparator 11 becomes VA voltage>VB lightning voltage, and its output becomes Lo, and the relay The coil is demagnetized and the relay contact 13 is turned off.

In this way, if the impedance of the heat-sensitive wire 8 is the same value for each carpet unit i, the impedance will be 1/2 when two units are connected, and 1/3 when three units are connected, which increases the number of units connected. However, we focused on the fact that even if we increase the number of connected units that operate when the heat-sensitive wire 8 receives heat, the required surface temperature of the unit cannot be changed during use, and the temperature can be reduced by connecting each unit. A correction impedance Z that adds an impedance commensurate with the impedance added is pre-built into the connecting pin receiving part a provided in each unit 1 to 3, and temperature control by the controller 10 is controlled by the number of units connected according to the initial setting impedance. It is possible to maintain the same temperature regardless of the temperature.

It should be noted that the correction impedance may be provided in the controller instead of in each unit, and the correction resistance value may be varied according to the number of units.

As described above, according to the present invention, a correction impedance for correcting the combined resistance of heat-sensitive wires that changes depending on the number of connected units is provided in the connection pin receiving portion of each unit f of a split-type electric carpet. The surface temperature of all mechanically and electrically connected units is the same, and the unit is configured so that it can be controlled using the attached controller, making it possible to create an electric carpet that provides stable heating regardless of the number of units connected. Can be provided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a split-type electric carpet according to the present invention, Fig. 2 is a perspective view showing an example of the electric carpet unit of the above, and Fig. 3 is a perspective view showing an example of the electric carpet unit of the same. FIG. 4 is a graph showing the impedance characteristics of the heat-sensitive wire, and FIG. 5 is a diagram showing the basic electric circuit between the carpet unit and the controller according to the present invention. 1 to 3... Carpet unit, a...
・Connection pin receiver, 7...Heating wire, 8...
・Heat-sensitive wire, 10... Controller, 11...
...Voltage comparator, 22...Plastic sensor, 24a, 24b...Conductor, Z...
・Correction impedance.

Claims (1)

[Scope of utility model registration request] A large-area carpet is constructed by electrically connecting small-area carpet units heated by heating wires to each other,
With this connection, in an electric carpet that controls energization of the heating wires according to the combined resistance value of the heat-sensitive wires that detect the surface temperature of each carpet unit connected in parallel, the combined resistance value of the heat-sensitive wires is set to a predetermined resistance value. An electric carpet characterized by having a correction impedance that is initially set.