JPH0689901B2 - Abnormality display device for electric carpet - Google Patents

Description

Description: [Object of the Invention] (Industrial field of application) The present invention relates to a multi-area switching type electric carpet abnormality display device in which a plurality of heating areas are formed by respective heaters.

(Prior Art) On an electric carpet, as shown in FIG. 5, a plurality of heating areas, for example, 1, 2, 3 are formed by arranging each heater,
Some of these heating zones 1, 2, and 3 can be heated by selecting a desired heating zone with a heating zone selection switch. Some of the electric carpets have a heating area display function for notifying the selected heating area.

By the way, when the heating zone selection switch is operated to indicate the heating zone and the heating zone is displayed, the user can know that the heating zone instructed to be displayed on the electric carpet is in the heating operation.

(Problems to be solved by the invention) However, if the heating zone selection switch does not indicate the heating zone at all, the heating zone is not informed whether the electric carpet is in the energized state or not. become.

In this case, it is safe if the electric carpet is not energized, but if it is energized, the user may judge that the electric carpet is not energized, which is very dangerous in using the electric carpet.

Therefore, the present invention provides an abnormality display device for an electric carpet, which can notify when all the heating areas of the electric carpet body are turned off in the energized state and can improve safety without being left in the energized state. The purpose is to do.

[Structure of the Invention] (Means for Solving Problems) According to the present invention, a plurality of heaters are arranged to form a plurality of heating zones, and each relay contact is connected between each heater and a power source. In an abnormality display device for an electric carpet that performs heating by instructing to energize a relay corresponding to a desired heating area among the relays having these relay contacts, an instruction detection unit that detects an instruction to deactivate all of the relays. The instruction detecting means detects an instruction to release the energization of all the relays, and if all the relays are in the deenergized state even after a predetermined time elapses from the detection, an operation leaving alarm is issued. An abnormality display device for an electric carpet, which is provided with an alarm means and is intended to achieve the above object.

(Operation) By providing such means, when the instruction detecting means detects an instruction to turn off all the relays of each heater corresponding to each heating area when the electric carpet main body is in the energized state, If all the relays are in the deenergized state even after a lapse of a predetermined time from the detection, the leaving alarm means gives an alarm of the operation leaving.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall configuration diagram of an abnormality display device for an electric carpet. In the figure, 10 is an electric carpet body,
Depending on the arrangement of heaters 11, 12, and 13, heating areas A, B, and C, respectively
Are formed. Here, the heating zone A is the left side, the heating zone B is the right side, and the heating zone C is the center side. Further, heat sensitive wires 14, 15 and 16 for temperature detection are arranged on the left surface A, the right surface B and the central surface C along the heaters 11, 12 and 13, respectively.

On the other hand, the power supply line of the power supply circuit 17 is connected to the relay contacts 18, 19, 20 of the relays Ry1, Ry2, Ry3 for supplying electric power to the heaters 11, 12, 13, and further these relay contacts 18, 19 ,
20 is connected to the heaters 11, 12, and 13, respectively. Further, a temperature signal circuit 21 is connected to each of the heat sensitive wires 14, 15 and 16, and each temperature detection signal of each surface A, B and C is sent from this temperature signal circuit 20 to a microcomputer 22. . In addition,
The temperature signal circuit 21 is provided with its own abnormality occurrence detection circuit for each signal processing system for each surface A, B, C.

Between the relay contacts 18, 19, 20 and the heaters 11, 12, 13 there is a relay abnormality detection circuit 23 that detects the occurrence of abnormality on each surface A, B, C.
Is connected, and the abnormality detection signal is sent to the microcomputer.
It will be sent to 22. In addition, each heat sensitive wire 14,15,16
Is connected to a heat-sensitive wire abnormality detection circuit 24 for detecting the occurrence of an abnormality such as disconnection of the heat-sensitive wires 14, 15, 16 for each surface A, B, C, and the abnormality detection signal is sent to the microcomputer 22. ing.

The microcomputer 22 is connected to a heating zone switch group 25 having heating zone selection switches on the left side A, the right side B, and the center side C, and a 7-segment display circuit for displaying the heating stage and the like on the carpet body 10 during heating. 26 is connected. It should be noted that each heating area selection switch of the heating area switch 25 is designed to be sent to, for example, the one-pulse microcomputer 22 by one push operation, and therefore,
The microcomputer 22 judges the energizing and deenergizing states of the relays Ry1, Ry2, and Ry3 each time each heating area selection switch is pressed, and if they are energized, the energizing state is deenergized and deenergized. If so, it has a function of energizing. Further, a buzzer 28 is connected to the microcomputer 22 via a buzzer drive circuit 27 and an abnormal liquid crystal display 29 is connected. This abnormal point display 29
The display areas 30, 31, 32 corresponding to the left side A, the right side B, and the center side C are formed as if the electric carpet body 10 was reduced.

The microcomputer 22 receives an abnormality detection signal from the temperature signal circuit 21, the relay abnormality detection circuit 23 and the heat-sensitive wire abnormality detection circuit 24 in accordance with the abnormality display flowchart shown in FIG. A code, for example, "C" shown in FIG. 3 (a) is displayed if the heat-sensitive wire is abnormal, and FIG.
Abnormality content display means indicated by "F", temperature signal circuit 21, relay abnormality detection circuit 23, and heat-sensitive wire abnormality detection circuit
It has a function as an abnormal point display means for receiving the abnormal detection signal from 24 and displaying the abnormal point on the abnormal point display 29.

By executing the operation detection flowchart shown in FIG. 4, the microcomputer 22 has the following respective functions. That is, when the entire heating areas A, B, and C are turned off during the operation of the heating area switch group 25, that is, the activation of the heating area switch group 25 releases the energization of all the relays Ry1, Ry2, and Ry3. Open state detection function that detects that each relay contact 18, 19, 20 is opened, this open state detection function detects that all relays Ry1, Ry2, Ry3 are deenergized Even if a predetermined time, for example 5 seconds, elapses from this detection, all relays Ry1, Ry
When y2 and Ry3 are in the deenergized state, it has an alarm function of alarming that the operation is left in the energized state, that is, sounding the buzzer 28 and blinking the 7-segment display circuit 26 to give an alarm.

Next, the operation of the apparatus configured as described above will be described with reference to the abnormality display flowchart shown in FIG. The microcomputer 22 constantly scans the state of the heating zone switch group 25. For example, when detecting that the heating zone selection switch on the left side A is operated, it is determined whether the relay Ry1 is energized or deenergized. to decide. Here, if the relay Ry1 is deenergized, the microcomputer 22 energizes the relay Ry1. This makes the relay contact 18
Is closed and electric power is supplied to the heater 11 on the left side A. At this time, the temperature signal circuit 21, the relay abnormality detection circuit 23, and the heat-sensitive wire abnormality detection circuit 24 each detect the occurrence of an abnormality. On the other hand, the microcomputer 22 determines in step s1, s2, s3 whether an abnormality has occurred in the heat-sensitive wire, an abnormality has occurred in the temperature signal circuit 21, or whether an abnormality has occurred in each relay Ry1, Ry2, Ry3. . Here, for example, if the heat-sensitive wire 15 is short-circuited with the heater 12 and an abnormality occurs, the heat-sensitive wire abnormality detection circuit 24 detects this and sends an abnormality detection signal indicating the heat-sensitive wire 15 to the microcomputer 22. When this microcomputer 22 receives the abnormality detection signal, it moves from step s1 to step s4 and determines the location of the heat-sensitive wire 15 where the abnormality has occurred. Here, since the heat-sensitive wire 15 is arranged on the right surface B, the microcomputer 22 proceeds to step s7 and issues a right-surface abnormal display command to the abnormal point display 29, and at the next step s8, issues a heat-sensitive wire abnormal display command. Issued to the 7-segment display circuit 26. Thus, the display area 31 of the abnormal point display 29 is converted to black and the 7-segment display circuit 26
The symbol "C" as shown in FIG.
As a result, it can be seen from the symbol "C" that an abnormality has occurred in the heat-sensitive wire and that the display area 31 indicates that the abnormal portion is the right surface B.

If the relay Ry1 is abnormal and the relay contact 18 is not closed, the relay abnormality detection circuit 23 detects this and sends an abnormality detection signal indicating the relay Ry1 to the microcomputer 22. When this microcomputer 22 receives the abnormality detection signal, it moves from step s3 to step s14 and determines the location of the relay Ry1 where the abnormality has occurred. Since this relay Ry1 corresponds to the left side A, the microcomputer 22 proceeds to step s15 and issues a left side abnormal display command to the abnormal point display 29, and at the next step s18 displays the heat sensitive line abnormal display command in 7 segments. Issue to circuit 26.
Thus, the display area 30 of the abnormal point display 29 is converted to black and the 7-segment display circuit 26 displays the code "A" as shown in FIG. 3 (c). As a result, it can be seen from the code "A" that an abnormality has occurred in the relay, and from the display area 30, the relay Ry corresponding to the left side B is the abnormal point.
It turns out to be 1. Similarly, when an abnormality occurs in the temperature signal circuit 21, the occurrence of the abnormality in the temperature signal circuit 21 and the abnormal portion are notified in steps s9 to s13.

On the other hand, the microcomputer 22 has a heating area switch group 25.
It is detected that the entire heating areas A, B, and C are simultaneously turned off during the operation of. Next, this operation will be described with reference to the operation detection flowchart shown in FIG. In step e1, the microcomputer 22 determines that one of the heating area selection switches has been operated, and in the next steps e2 and e3, it determines whether the switch is the right side switch or the left side switch. Here, if it is determined that the heating area selection switch on the right side A is operated, for example, the step
Go to step e4 from e2 and relay Ry1 corresponding to right side A
It is determined whether or not is energized or is deenergized. If the relay Ry1 is energized and electric power is supplied to the heater 11, the microcomputer 22 proceeds to step e5 to release the energization of the relay Ry1 to cut off the electric power supply to the heater 11. . Then, in the next step e7, the microcomputer 22 sets the relays Ry1, Ry2, Ry3.
Are all de-energized and the entire heating areas A, B and C are OF
Determine if it is in the F state. If all the heating areas A, B, and C are in the OFF state, the process moves to the next step e8, the 5-second timer is activated, and the process returns to step e1. And in this state, the heating area switch group 25
If the switches are not operated, the determinations in steps e9 and e1 are repeated, and after 5 seconds, the microcomputer
In step 22, the process goes from step e9 to step e10 to send a buzzer generation command to the buzzer drive circuit 27, and also a blinking command to the 7-segment display circuit 26. Thus, it is notified that the entire heating areas A, B, C are OFF.

When the heating area selection switch on the left side B is operated while the notification is being made in this way, the microcomputer 22 moves from step e3 to step e11 and the relay Ry2 corresponding to the left side B is energized. Judge whether it is in the de-energized state Since this relay Ry2 is in the de-energized state, the microcomputer 22
Moving to e13, the relay Ry2 is energized to supply electric power to the heater 12. Then, move to the next steps e14, e15, e16 and 5
The second timer is stopped and the timer is reset, the buzzer generation command to the buzzer drive circuit 27 is released, and the 7-segment display circuit 26 stops blinking. When the heating area switch on the center plane C is operated, steps e17 to e19 are executed to execute the relay Ry3.
Energize or deenergize.

As described above, in the above-described embodiment, when the heating zone switches 25 are operated to turn off the entire heating zones A, B, and C, the buzzer 28 and the 7-segment display circuit 26 blink. Safety is improved because the electric carpet controller is no longer left in an energized state. In this case, since the elapse of 5 seconds after the entire heating areas A, B, and C are turned off by the 5-second timer operation of step e8, the central plane C is turned off, for example.
In the state, when the heating area selection switch on the left side A is operated to turn off the left side A and then the heating area selection switch on the right side B is operated to turn on the right side B, the heating area A is temporarily
There are times when the entire surfaces of B and C are turned off, but at this time there is no false notification that the entire surface is off.

Further, in the above embodiment, the temperature signal circuit 21, each relay Ry
It is possible to clearly understand the content of the abnormality and the location of the abnormality in any of 1, Ry2, Ry3 and each of the heat sensitive wires 14 to 16.

The present invention is not limited to the above-mentioned embodiment, and may be modified without departing from the spirit of the invention. For example, by operating the heating zone switch group 25, the entire surfaces A, B, C are OF
The notification when the F state is set may be configured such that the buzzer 28 is operated and the heating zone switch 25 is continuously operated from when the entire surfaces A, B, and C are in the OFF state. Well, the buzzer 28 is not operated for 5 seconds after the entire surfaces A, B, and C are turned off, and the buzzer 28 is not operated for 5 seconds.
May be operated for 3 minutes and stopped.

[Effects of the Invention] As described in detail above, according to the present invention, when all the heating areas of the electric carpet main body are turned off in the energized state, this can be notified, and safety is maintained without being left in the energized state. It is possible to provide an abnormality display device for an electric carpet that can improve the property.

[Brief description of drawings]

1 to 4 are views for explaining an embodiment of an abnormality display device for an electric carpet according to the present invention. FIG. 1 is a configuration diagram, FIG. 2 is an abnormality display flowchart, and FIG.
FIG. 4 is a diagram showing a display example of abnormality contents, FIG. 4 is an operation detection flowchart, and FIG. 5 is a diagram showing a multi-area switching electric carpet. 10… Electric carpet body, 11,12,13… Heater, 14,15,16
… Thermal wire, 17… Power circuit, 18, 19, 20… Relay contact, 21…
Temperature signal circuit, 22 ... Microcomputer, 23 ... Relay abnormality detection circuit, 24 ... Heat ray abnormality detection circuit, 25 ... Heating area switch group, 26 ... 7 segment display circuit, 27 ... Buzzer drive circuit, 28 ... Buzzer, 29 ... Abnormal point indicator, Ry1, Ry2, Ry
3 ... relay.

Claims (1)

[Claims] 1. A desired heating area among relays having a plurality of heaters arranged to form a plurality of heating areas and connecting each relay contact between each heater and a power source. In an abnormality display device for an electric carpet that performs heating by instructing to energize the relays corresponding to, an instruction detection unit that detects an instruction to release all the energization of each relay, and each of the relays by the instruction detection unit. If all the relays are in the deenergized state even if the instruction to deactivate all is detected and a predetermined time has elapsed from this detection,
An abnormality display device for an electric carpet, comprising: a leaving alarm means for issuing an alarm for an operation leaving.