JP2982935B2 - Electric carpet control equipment - 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 carpet, and more particularly to control of energization of a heater.

[0002]

2. Description of the Related Art FIG . 5 is a block diagram showing a conventional control device for an electric carpet. Reference numeral 1 denotes an AC power supply, which includes a power switch 2, a temperature-regulating variable resistor 3, a rectifying diode 4, and a regulating resistor 10 connected in series. The rectifier diode 4 is connected to the negative input terminal of the comparator 5 through a circuit.
The sensor line 6 is connected between the connection point of the control resistor 10 and the ground and the ground. The output of the comparator 5 is a relay driver 7
The heater 8 is turned on and off by switching the contact. The sensor wire 6 is laid in parallel with a heater 8 of the electric carpet, and the heater 8 and the sensor wire 6 are provided via an insulating layer. The temperature change of the electric carpet heated by the heater 8 is detected by the sensor line 6 and output as a change in impedance. That is, the impedance decreases as the temperature increases, and increases as the temperature decreases. Therefore, a resistance value determined by setting the variable resistor 3 to a desired temperature and a detection voltage determined by the impedance detected by the sensor line 6 are input to the minus input terminal of the comparator 5. The reference voltage 8 input to the plus input terminal of the comparator 5 is compared with a detection voltage (minus input terminal). If the detection voltage is higher than the reference voltage 8, an output signal is sent. Like that.

However, in these electric carpet control devices, the sensor wire 6 is laid in parallel with the heater 8 inside the electric carpet, and the temperature change heated by the heater 8 is detected by the sensor wire. 6
Is output as a change in the impedance detected in step (1), the temperature of the surface of the electric carpet is not detected, and the temperature of the heater 8 is actually detected. Furthermore, since it is common to put a cover on the electric carpet during use, the difference between the temperature of this cover and the temperature inside the electric carpet is large, and therefore, the temperature of the person's preference or the temperature of the cover is sensitive, In addition, the temperature cannot be detected quickly, and the temperature is not properly controlled. In addition, as a means of improving the cushion of the cover and the feel, many materials using a sponge having elasticity on the back surface of the cover, a nonwoven fabric, or the like are used. Is to appear. In view of the above, the emergence of an electric carpet that controls the temperature in response to a change in room temperature and a change in surface temperature due to the movement of an object on the cover of the electric carpet has been desired.

[Problems to be solved by the invention]

The present invention has been made in view of such a point, and lays a sensor wire in a cover of an electric carpet,
It is an object of the present invention to provide an electric carpet that performs temperature control in response to a change in surface temperature due to a change in room temperature and a movement of an object on an electric carpet cover.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the first invention of the present application is directed to a variable resistor, a rectifier diode, a carpet, and a variable resistor that are linked to each other via an AC power supply via a power switch. A series circuit of a sensor wire provided on the main body and the cover is connected, and a connection point between the rectifier diode and the sensor wire is connected to a minus input terminal of each comparator via an adjustment resistor, and a plus input terminal of the comparator is connected. The relay drive unit is operated by the output signal of the comparator to control the energization of the heater provided in the carpet body.
According to a second aspect of the present invention, a series circuit of a variable resistor, a rectifier diode, and a sensor wire provided on a cover is connected to an AC power source via a switch, and the connection between the rectifier diode and the sensor wire is made. From the point connected to the minus input terminal of the comparator via the adjustment resistor, input the reference voltage to the plus input terminal of the comparator, and operate the relay drive unit with the output signal of the comparator to the heater provided on the carpet body Characterized in that the current supply is controlled. A third invention of the present application relates to the first and second inventions of the present application, wherein a plurality of heaters of the carpet main body are provided, and the power supply to each heater is controlled. The fourth invention of the present application is directed to the first invention of the present application, wherein each of the adjustment resistors has a difference in resistance value, and detects a temperature on a cover side to control energization to a heater. .

[0006]

According to the above construction, according to the electric carpet control device of the present invention, when the power is turned on, the temperature of the carpet body is substantially the same as room temperature, so that the temperature of the sensor wire is low and the impedance is large. In this state, the detection voltage is high, and the detection voltage input to the minus input terminal of the comparator is higher than the reference voltage input to the plus input terminal. The signal is transmitted, and the relay drive unit is operated by this signal, thereby energizing the heater laid in the carpet body. Sensor wire laid inside one cover,
The circuit connected to this operates in the same way as described above, but when the temperature rises, the adjustment is made between the connection point between the sensor wire and the rectifier diode provided in the carpet body and the minus input terminal of the comparator. Since the resistance value of the adjustment resistor provided on one cover side is set smaller than the resistance value of the resistor, the detection voltage on the cover side is higher than the detection voltage on the carpet body side. Therefore, since the output signal of the comparator that detects the temperature on the cover side is sent after the output signal of the comparator on the carpet body side, the relay driving section is activated by the temperature on the cover side, and the output to the heater is controlled. When the power is cut off and the temperature drops, the relay drive unit operates by the temperature on the cover side to supply power to the heater.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a control device for an electric carpet of the present invention. FIG. 2 (A)
Is a top view of the control device of the electric carpet of the present invention,
(B) is an essential part cross-sectional view of the carpet body and the cover of (A). Among the elements described in the above-mentioned prior art, those having the same functions are given the same numbers, and detailed descriptions similar to those described above are omitted. In the figure, a controller 11 is integrally fixed to a corner of the carpet body. 12 is a carpet body 13 is to be secured with a cover of the carpet body 12, the attachment plug Moshiku this corner is connected to a circuit of the controller 11 by screws or the like. 1
Reference numeral 4 denotes a sensor line laid in the non-woven fabric 15 of the cover 13, and its end is connected to a circuit in the controller 11. Reference numeral 16 denotes a variable resistor which has a structure interlocked with the variable resistor 3 and operates the connected slider so that the resistance value is also interlocked in the same direction (if one becomes higher, the other becomes higher).
(The direction in which it also rises) . 17
Is an adjustment resistor, the resistance value of which is set to a value smaller than the adjustment resistor 10 provided in the circuit for controlling the carpet main body 12 side, and the connection between the sensor wire 14 on the cover 13 side and the rectifier diode 18 is connected. The point is connected to the minus input terminal of the comparator 19, the reference voltage 9 is input to the plus input terminal, and the output terminal is connected to the relay driver 7. Further, the heater 8 is divided and arranged in a plurality,
The sensor wire 6 and the sensor wire 1 corresponding to each heater 8
4, and comparators 5 and 19, each heater
Detects the temperature of each block of 8 and enables fine-grained control
And

FIG . 3 shows an electric carpet control device according to the present invention.
A graph for explaining the operation of (A) is a normal use
(B) shows the main unit side and power when the heat source is placed on the top surface.
It shows the change in temperature on the bar side. FIG. 4 shows the present invention.
Table for explaining the operation of the electric carpet control device
And the minus of the comparator 5 and the comparator 19
Detection voltage input to input terminal is input to positive input terminal
+ Is a state lower than the reference voltage, and-is a state higher than the reference voltage.
And each state of the comparator 5 and the comparator 19
5 shows a driving state of the relay driving section with respect to FIG. The operation of the above configuration will be described with reference to FIGS.
I do. First, turn on the power by operating the power switch 2,
When a desired temperature is set by operating knobs (not shown) of the variable resistors 3 and 16 , both variable resistors 3 and 16 are set.
5 and 1 connected from rectifier diodes 4 and 18 to rectifier diodes 10 and 17 from rectifier diodes 4 and 18
9, the resistance values of the variable resistors 3 and 16, the impedance detected by the sensor wires 6 and 14 laid in the electric carpet body 12 and the cover 13, and the resistance values of the adjustment resistors 10 and 17. The detection voltage determined through the input is input. As shown in FIG. 3, when the power is turned on , since the temperature of the electric carpet is substantially the same as room temperature, the temperature of the sensor wires 6 and 14 is low and the impedance is large, so that the detection voltage is high . As shown in state 1, the detected voltage input to the negative input terminals of the comparators 5 and 19 exceeds the reference voltage 9 input to the positive input terminal to the higher side (+). And 19 compare and send an output signal together from the output terminal, and actuate (ON) the relay drive unit 7 by this signal to energize the heater 8 laid in the carpet body 12. Power on
After a while, the carpet body on which the heater 8 was laid
12 rises in temperature and this heat is conducted to the cover 13 side.
Therefore, as shown in FIG.
If the temperature exceeds the temperature detected by the sensor line 14, the sensor
The temperature detected by the line 6 exceeds the reference voltage, and the state 2 in FIG.
The state shown in is shown. In this state 2, the comparator
The detection voltage input to the negative input terminal of the
Lower than the reference voltage input to the
Detection voltage input to the minus input terminal of the parator 19
Is higher than the reference voltage input to the plus input terminal.
Therefore, as shown in FIG. 4, the relay drive unit is kept in the ON state.
Through the heater 8 laid in the carpet body 12
Holding electricity. Since energization of the heater 8 continues, the car
The temperature of the pet body 12 and the cover 13 further rises
Then, when the state 3 of FIG. 4 is reached, the relay drive unit is turned off.
Power to the heater 8 laid in the carpet body 12
To stop. When the power supply to the heater 8 is stopped, FIG.
As shown, the temperature of the carpet body 12 and the cover 13
The degree is gradually decreasing. In normal use,
As shown in FIG. 3A, the temperature of the cover 13 decreases.
Is faster, as shown in state 4 of FIG.
The detection voltage input to the negative input terminal
It becomes higher than the reference voltage input to the scan input terminal, relay
The drive unit is turned on to turn off the light laid in the carpet body 12.
Data 8 is restarted. However, for example,
When using a combination of nuts, warm the top of the cover 13 with kotatsu.
Therefore, as shown in FIG.
The temperature drop is slower than the temperature drop on the carpet body 12 side.
Therefore, the state is not changed to the state 4 in FIG.
The detection voltage input to the negative input terminal of
Higher than the reference voltage input to the
-Turned on the drive unit and laid in the carpet body 12
Power supply to the heater 8 is restarted. In other words, electric gotatsu is used together
The upper surface of the cover 13 with another heat source as if
In such a case, the temperature of the cover 13 does not drop
Therefore, the sensor wire 14 is provided only on the cover 13 side,
-When the sensor line 6 is not provided on the pet body 12,
Data 8 is delayed, causing discomfort to the user.
However, the sensor line 6 is also provided on the carpet body 12 side.
This enables more comfortable temperature control.

The sensor wire 14 on the cover 13 is aligned with the sensor wire 14.
A connection point connecting the current diode 18 and a comparator
19, the resistance of the adjustment resistor 17 connected between the minus input terminals.
Adjustment used on the carpet body 12 side against the drag value
Since the resistance value of the resistor 10 is set to a large value,
The detection voltage input to the negative input terminal of the comparator 5
The pressure is the negative input of the comparator 19 on the cover 13 side.
It should be lower than the detection voltage input to the terminal
You . Therefore, the temperature of the electric carpet rises after a certain time after power-on, at the output voltage of the comparator 5 and 19 to stop the power supply to stop the heater 8, this
Input to the minus input terminals of both comparators
The detection voltage is closer to the cover 13 than to the carpet body 12.
Lower, in fact, the operation of the comparator 19 output voltage abreast by drop of the detected voltage of the cover 13 side is stopped, energization of the heater 8 is turned off relay driver 7 is operated. Similarly, when the temperature is lowered and the heater 8 is energized again, the output signal of the comparator 19 to which a high detection voltage is supplied is used as described above.
Is supplied with electricity. As a result, the rise and fall of the temperature of the cover 13 are detected, and the power supply to the heater 8 is repeatedly turned off and off. That is, the cover 13 has a more heat insulating property.
If a good one is used, the resistance of the adjusting resistor 17
By making the difference between the value and the adjustment resistance 10 larger,
And the power supply to the heater 8 is stopped when the power is turned on.
Time (Ts) until the temperature of the cover
Control the temperature to rise to the set temperature faster
Becomes possible. That is, the resistance value of the adjustment resistor 17 and the resistance value of the
The adjustment resistor 10 depends on the quality (heat insulation) of the cover 13.
Comfortable control is possible by determining the difference between
You. As described above, the sensor provided on the cover 13
The power supply to the heater 8 is controlled by the temperature detected by the line 14.
The sensor installed on the carpet body
Compared to the case where the power supply to the heater 8 is controlled by the
To detect changes in temperature due to room temperature and human movement faster
Temperature can be adjusted according to the set temperature
It can be controlled to arrive earlier . In addition, since an excessive temperature rise due to abnormal use is also detected by the sensor wire 6 laid in the carpet body 12, the two sensor wires 6 and 14 are in a state of monitoring an abnormal temperature. Safety can be greatly improved.

[0010]

As described above, according to the present invention, a sensor line laid in a cover detects room temperature fluctuations and changes in surface temperature due to the movement of an object on an electric carpet cover. The temperature can be finely controlled in accordance with the preference of the person, and the effect is enhanced in combination with the sensor wire in the electric carpet body to double the safety.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a control device for an electric carpet of the present invention.

FIG. 2A is a top view of an electric carpet control device of the present invention, and FIG. 2B is a cross-sectional view of a main part of a carpet body and a cover.

3A and 3B are graphs for explaining the operation of the electric carpet control device of the present invention, wherein FIG. 3A shows a case where a normal use is performed, and FIG. 3B shows a case where a heat source is placed on an upper surface.

FIG. 4 is a table for explaining the operation of the electric carpet control device of the present invention.

FIG. 5 is a block diagram showing one embodiment of a conventional electric carpet control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply 2 Power switch 3 Variable resistor 4 Rectifier diode 5 Comparator 6 Sensor wire 7 Relay driver 8 Heater 9 Reference voltage 10 Adjusting resistor 11 Controller 12 Carpet body 13 Cover 14 Sensor wire 15 Non-woven fabric 16 Variable resistor 17 Adjusting resistor 18 Rectifier diode 19 Comparator

Claims (4)

(57) [Claims] 1. A series circuit of a variable resistor, a rectifier diode, and a sensor wire provided on a carpet body and a cover, which are linked to each other, is connected to an AC power supply via a power switch, and the rectifier diode and the sensor are connected to each other. From the connection point with the line, connect to the minus input terminal of each comparator via the adjustment resistor, input the reference voltage to the plus input terminal of each comparator, operate the relay driver with the output signal of the comparator, and operate the carpet. A control device for an electric carpet, characterized by controlling energization of a heater provided in a main body. 2. A series circuit of a variable resistor, a rectifier diode, and a sensor wire provided on a cover is connected to an AC power source via a switch, and a connection point between the rectifier diode and the sensor wire is connected. Connected to the negative input terminal of the comparator via the adjustment resistor, input the reference voltage to the positive input terminal of the comparator, and actuate the relay driver by the output signal of the comparator to energize the heater provided on the carpet body A control device for an electric carpet, comprising: 3. The electric carpet control device according to claim 1, wherein a plurality of heaters of the carpet body are provided, and energization of each heater is controlled. 4. The control device for an electric carpet according to claim 1, wherein each of the adjusting resistors has a difference in resistance value, and detects a temperature on a cover side to control energization of a heater. .