KR200409592Y1 - The smoke sensing apparatus with the alarm funcion of cleaning time. - Google Patents

Abstract

The present invention relates to a smoke detection device, and in particular, the smoke detection device that detects a fire through smoke generated in a room has a cleaning notification function that detects contamination by dust or other foreign matters and recognizes it to a user. It relates to an added soft sensing device.

The configuration of the present invention for achieving the above object is driven through a predetermined power supply to detect the degree of pollution and smoke, and by amplifying the detected signal to display a cleaning notification when the detection signal falls within a certain level range And a soft detection member configured to execute a fire alarm if the detection signal is above a predetermined level; A signal transmitting unit which transmits an input / output signal of the soft sensing member; And a drive control member for setting a soft sensing level or a cleaning level in the detection signal measured by the soft sensing member through the signal transmission unit, and displaying a set level and an operation signal of the soft sensing member.

Fire alarm, smoke detection, cleaning notification, smoke detector, fire alarm device

Description

The smoke sensing apparatus with the alarm funcion of cleaning time.

1 is a perspective view showing a general soft sensing device,

Figure 2 is a block diagram of the soft-sensing device with a cleaning notification function according to a preferred embodiment of the present invention,

3 is a circuit diagram showing a drive control member according to an embodiment of the present invention;

4 is a detailed circuit diagram of an amplifying circuit power supply unit, a soft sensing unit, an amplifying unit, and a disconnection detecting unit in the block diagram of FIG. 2;

5 is a detailed circuit diagram of the cleaning notification unit in the block diagram of FIG. 2.

Explanation of symbols on the main parts of the drawings

100: annual detection member 110: cleaning notification unit

120: fire alarm unit 130: amplification circuit power supply

140: annual detection unit 150: amplification unit

160: constant current unit 170: disconnection detection unit

180: memory 190: year detection control unit

The present invention relates to a smoke detection device, and in particular, the smoke detection device that detects a fire through smoke generated in a room has a cleaning notification function that detects contamination by dust or other foreign matters and recognizes it to a user. It relates to an added soft sensing device.

Fire monitoring systems can be largely compared to smoke and heat detection types. The double heat detection fire detection system has a positive temperature system that connects the contact by operating the bimetal inside when the ambient temperature rises, and pushes the diaphragm in the thermal chamber when the ambient temperature rises sharply. There is a differential type to sense by joining the contacts inside the contacts.

The heat-sensing fire detector has a weak effect on the installation environment, but has a narrow detection range and a slow detection time, so it is only detected when a high temperature is generated by the flame. Therefore, it is difficult to meet the fire purpose of early detection and early evolution. have.

In addition, smoke detection fire detection system (hereinafter, smoke detection device) has been widely used in general ground buildings because of the advantages of wide detection range and fast detection time. Furthermore, the installation of the yearly monitoring device is inevitable in places where the monitoring range is wide and early detection is premised, such as telecommunication or power equipment.

Such a general soft detection device is as shown in FIG.

1 is a perspective view showing a general soft sensing device.

As shown in the drawing, a general annual sensing device is fixed to a ceiling or other structure to fix the bracket 15, the support bracket 14 formed on the upper surface of the fixing bracket 15, and protrudes from the center of the support bracket 14 It is formed of a protrusion 13 formed. Among them, a light emitting element 12 and a light receiving element 13 for detecting smoke are formed on the upper surface of the fixing bracket 15, and an alarm means for alarming the occurrence of fire or smoke on the upper surface of the support bracket 14 ( 11), wherein the alarm means 11 is composed of a light emitting element or means for generating an alarm sound.

Here, the light emitting element 12 and the light receiving element 13 are directed in a 90 degree direction, so that the light emitted from the light emitting element 12 is transmitted to the light receiving element unless the light is reflected by the reflecting plate or other reflecting means. Not delivered.

That is, since the light emitting element 12 and the light receiving element 13 are installed to be directed at 90 to 120 degrees, light emitted from the light emitting element 12 is not normally received by the light receiving element 13, but is smoked indoors. Is generated, light emitted from the light emitting element 12 and diffusely reflected light is transmitted to the light receiving element 13.

Therefore, the light receiving element 13 transmits an electrical signal proportional to the amount of light incident to the control means (not shown) of the soft sensing device, so that the control means recognizes that a fire occurs in the room, and alerts the alarm means 11. Run to alert you to a fire.

However, in the conventional soft-sensing device such as dust or foreign matter is accumulated in the light emitting device or the light receiving device as configured in the ceiling or other locations in the interior of the building. Therefore, the soft detection device may malfunction due to the diffuse reflection of dust or other foreign matters, and the user should clean the soft detection device regularly, but it is impossible to know exactly when to miss the time required for cleaning. Therefore, there is a problem that a malfunction occurs at a critical time.

The present invention devised to solve the above problems is to provide a cleaning device with a cleaning notification function to provide a convenience to the user by displaying the cleaning time when the dust or other foreign matter accumulated in the soft sensing device. It is done.

The configuration of the present invention for achieving the above object is driven through a predetermined power supply to detect the degree of pollution and smoke, and by amplifying the detected signal to display a cleaning notification when the detection signal falls within a certain level range And a soft detection member configured to execute a fire alarm if the detection signal is above a predetermined level; A signal transmitting unit which transmits an input / output signal of the soft sensing member; And a drive control member for setting a soft sensing level or a cleaning level in the detection signal measured by the soft sensing member through the signal transmission unit, and displaying a set level and an operation signal of the soft sensing member.

Here, the soft sensing member and the cleaning notification unit for warning the cleaning time; A fire alarm unit for outputting a fire alarm; An amplifying circuit power supply unit for transmitting power; A soft-sensing unit which is driven by the power supplied from the amplifying circuit power unit to detect smoke and output a soft-sensing signal; First amplifying means which is turned on by the power delivered from the amplifying circuit power supply and amplifies the detection signal transmitted from the soft sensing unit; An amplifier comprising a noise filtering means connected to an output terminal of the first amplifying means and removing noise of an output signal; A constant current unit which maintains the driving signal of the soft sensing unit as a constant signal; When the annual detection signal transmitted from the amplification unit falls within a predetermined level, the cleaning notification unit is controlled to display a cleaning notification time. When the annual detection signal is above a predetermined level, the fire alarm unit controls the fire to alarm the fire. It includes a year detection control unit.

The soft sensing member may further include a memory in which a setting signal transmitted from the driving control member is stored.

The soft sensing unit may include: a first light emitting device having a first electrode connected to an output side of the amplifying circuit power supply unit; And a light receiving element having a second electrode connected to an input side of the first amplifying means.

Here, the constant current unit and the first constant current means for maintaining the drive signal output from the soft sensing means at a constant level; Voltage dividing means for dividing a signal of a predetermined level output from the first constant current means; Second amplifying means connected to an output side of the voltage dividing means at a non-inverting terminal: a first electrode connected to the light emitting element, and a second electrode connected to the second amplifying means to output an output signal of the second amplifying means First switching means turned on to drive the light emitting device; And a second constant current means connected to the third electrode of the first switching means to set the output offset value to zero when the input of the second amplifying means is zero.

Here, the second constant current means includes a first resistor connected to the third electrode of the first switching means, and a diode connected to the first electrode on one side of the first resistor.

The disconnection detecting unit may include a first electrode connected to a predetermined power source, and second switching means connected to a second electrode between the first switching means and the second constant current means. By connecting the constant current unit between the first electrode and the power supply, when the off signal is transmitted to the first switching means, the disconnection detection signal of the light emitting element is output to the soft detection control unit.

The cleaning notification unit may include a second light emitting device having a first electrode connected to the soft sensing control unit, a first resistor connected to a second electrode of the second light emitting device at one side, and a second of the second light emitting device. A first capacitor connected in parallel between an electrode and the first resistor, and a power supply terminal for supplying power from the other side of the first resistor, wherein the soft sensing controller is repeatedly driven in a standby mode for a predetermined time; And cleaning the alarm by turning on the second light emitting element for a predetermined time shorter than the predetermined time.

The driving control member may further include: a power control unit configured to transfer power of the soft sensing member through the signal transmission unit; A display unit which displays a predetermined image according to a soft detection signal or a cleaning notification signal output from the soft detection controller; And a driving control unit for controlling the power control unit and the display unit.

Among these, the power control unit includes third switching means connected to the signal transmission unit, and fourth switching means connected to the third switching means at a first electrode and connected to the driving control unit at a second electrode, The driving control unit may turn on / off the power of the soft sensing control unit by driving control of the third switching unit by turning on / off the fourth switching unit.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the soft-sensing device with a cleaning notification function according to the present invention will be described in detail.

Figure 2 is a block diagram showing a soft sensing device with a cleaning notification function according to an embodiment of the present invention.

Referring to FIG. 2, the present invention provides a soft sensing member 100 for detecting a smoke detection and cleaning time, a drive control member 200 for controlling the soft sensing member 100, and the soft sensing member 100. And a signal transmission unit 300 connecting the drive control member 200.

Here, the soft-sensing member 100 is a constant current unit 160 for controlling the component, a cleaning notification unit 110 for alarming the cleaning notification time according to the control of the constant current unit 160, and the soft detection control unit 190 Fire alarm unit 120 for emitting a fire alarm according to the control of the control unit, an amplifying circuit power supply unit 130 for turning on the amplification unit 150 and the soft detection unit 140 by the control of the soft detection control unit 190, On / off through the power delivered from the amplifying circuit power supply 130, the soft-sensing unit 140 for detecting smoke, and the amplified detection signal output from the soft-sensing unit 140 to output to the soft-sensing control unit 190 The amplification unit 150, the constant current unit 160 for maintaining the driving power of the soft sensing unit 140 at a constant level, and the softening through the output signal of the constant current unit 160 and the soft sensing unit 140 The disconnection detecting unit 17 which detects the disconnection of the branch 140 and applies it to the soft detection control unit 190. 0) and a memory 180 in which a setting level and an operation signal of the soft sensing device transmitted from the driving control member 200 are stored.

In addition, the drive control member 200 includes a drive control unit 220 for controlling a component, a power control unit 210 for supplying power to the soft sensing member 100 under the control of the drive control unit 220, A display unit 230 for displaying a setting level and an operation signal stored in the memory 180 of the soft sensing member 100 under the control of the driving controller 200, and a key input unit for inputting a user's operation signal ( 240).

When the user inputs the cleaning time notification and the fire alarm setting value of the soft detection device through the key input unit 240, the driving controller 220 turns on the display unit 230 and displays it, and the signal transmission unit ( The control signal of the user is transmitted to the soft sensing member 100 through 300. Therefore, when the user's manipulation signal is transmitted through the signal transmission unit 300, the soft detection control unit 190 stores the same in the memory 180. In addition, the drive control unit 220 controls the power control unit 210 to output the drive power to the soft sensing member 100.

At this time, the data stored in the memory 180 is a fire alarm when the detection signal output from the soft-sensing unit 140 is a predetermined level or more, if the detection signal within the range below the predetermined level at a predetermined level or more of the cleaning time It is set as an alarm.

When a predetermined signal is output from the soft sensing controller 190 to the amplifying circuit power supply unit 130, the amplifying circuit power supply unit 130 outputs a predetermined power to the soft sensing unit 140 and the amplifying unit 150 to turn it on. In addition, the soft-sensing unit 140 is turned on by the power supplied from the amplifying circuit power supply unit 130 and the driving of the constant current unit 160 to transmit a detection signal to the amplifying unit 150.

Therefore, the amplifying unit 150 amplifies the detection signal output from the soft sensing unit 140 to a predetermined level and transmits it to the soft sensing controller 190. Accordingly, the soft detection control unit 190 drives the fire alarm unit 120 or the cleaning notification unit 110 by comparing the level of the detection signal applied from the amplifying unit 150 with a set value stored in the memory 180. .

In addition, the constant current unit 160 maintains the driving power of the soft sensing unit 140 at a constant level to stabilize the output of the soft sensing unit 140 and also transmits it to the disconnection detecting unit 170. Accordingly, the disconnection detecting unit 170 detects the disconnection of the soft sensing unit 140 according to a signal applied from the constant current unit 160 and outputs the disconnection to the constant current unit 160.

3 is a detailed circuit diagram showing a drive control member.

As shown, the power control unit 210 transfers power to the soft sensing controller 190 through the signal transmission unit 300, and a relay is connected to a power line of the signal transmission unit 300. do. In addition, the signal transmitter 300 transmits power output from a power supply unit (not shown) to the soft sensing controller 190 by switching of the relay.

In addition, the power control unit 210 of the first transistor (Q1) is connected to the relay (Relay), the second electrode is connected to the drive control unit 220 and the first transistor (Q1) of the The first resistor R1 is connected between the second electrode and the driving controller 220.

Accordingly, the driving controller 220 outputs an on signal through the first output port TX1, and the first transistor Q1 is turned on by the on signal transmitted through the first output port TX1 and the relay is turned on. Turn on (Relay). Thus, for example, a 24V power output from a power supply unit (not shown) is transmitted to the soft sensing member 100 through the signal transmission unit 300.

In addition, when the user sets or modifies the setting values for the cleaning level and the fire alarm level through the key input unit 240, the driving control unit 220 controls the soft-sensing control unit 190 through the second output port TX2. Pass it to. Therefore, the soft detection controller 190 reads the data stored in the memory 180 and transfers the data stored in the memory 180 through the second input port I2 of the driving controller 220. In addition, the soft touch control unit 190 reads the data of the display unit 230 from the memory 180 and transmits the data to the drive control unit 220.

Accordingly, the driving controller 220 turns on the display 230 based on the display data stored in the memory 180 through the third input port I3 and displays the set value stored in the memory 180. do. Therefore, the user may input a modified or new input while checking the storage setting value of the memory 180 displayed on the display 230.

4 is a detailed circuit diagram illustrating a soft sensing member.

Referring to FIG. 4, the amplifying circuit power supply unit 130 includes a second resistor R2 connected to the second output port OP CTL of the soft-sensing control unit 190 and a base of the second resistor R2. A second transistor Q2 connected to the emitter electrode and a ground terminal connected to the emitter electrode, a third resistor R3 connected to a collector terminal of the second transistor Q2, and a third resistor R3. And a fourth resistor R4 connected thereto. In addition, a third transistor Q3 having a base connected between the third and fourth resistors R3 and R4 and an emitter connected to the fourth resistor R4 is configured, and the third transistor ( The collector end of Q3) is connected to the amplifier 150.

In addition, the amplifier 150 includes a fifth resistor R5 and a second resistor R5 connected in parallel to an output terminal of the first op amp OP1 and the first op amp OP1 connected to the third transistor Q3. It includes a capacitor (C2), the output terminal of the first op amp (OP1) is connected to the first input port (P0) of the soft sensing controller 190.

In addition, the soft sensing unit 140 has an anode connected to the fourth resistor R4, a cathode connected to the constant current unit 160, and an anode connected to the first op amp OP1. It is connected to the inverting terminal of (-), the cathode includes a light receiving element (PD1) is connected to the ground terminal (GND).

The constant current unit 160 includes a sixth resistor R6 connected to the first output port LED CTL of the soft sensing controller 190, and an anode connected to the sixth resistor R6 and connected to the cathode. Zener diode (D1) connected to the ground terminal (GND), the seventh resistor (R7) connected between the zener diode (D1) and the sixth resistor (R6), and the seventh resistor (R7) A second op amp OP2 connected to an inverting terminal +, an eighth resistor R8 connected in parallel between the second op amp OP2 and a seventh resistor R7, and the second op amp A ninth resistor R9 connected to the output terminal of OP2, a base connected to the ninth resistor R9, the first light emitting device LED1 at the collector end, and a tenth resistor R10 at the emitter end. ) Is connected to the fourth transistor (Q4), the anode is connected to the tenth resistor (R10), and the cathode is connected to the ground terminal (GND). At this time, the fourth transistor Q4 and the inverting terminal (−) of the second op amp OP2 are connected.

In addition, the disconnection detecting unit 170 includes an eleventh resistor R11 connected between the emitter terminal of the fourth transistor Q4 and the tenth resistor R10, and a base connected to the eleventh resistor R11. The collector terminal includes a fifth transistor Q5 connected to a power supply terminal Vcc through a twelfth resistor R12 and an emitter terminal connected to a ground terminal. The collector terminal of the fifth transistor Q5 includes a fifth transistor Q5. A second input port LED WD of the soft sensing controller 190 is connected between the 12 resistors R12.

In the above configuration, when a high level signal is output through the second output port OP CTL of the soft-sensing control unit 190, the amplification by turning on the second transistor Q2 and the third transistor Q3. The driving power is transmitted to the first op amp OP1 of the unit 150, and the driving power is applied to the anode of the first light emitting device LED1.

In addition, when the constant current unit 160 outputs a signal of a predetermined level through the first output port LED CTL, the zener diode D1 maintains the output signal of the constant current unit 160 at a constant level to generate a seventh resistor. It transfers to the voltage distribution circuit which consists of R7 and the 8th resistor R8. Since the signal divided by the seventh resistor R7 and the eighth resistor R8 is input to the non-inverting terminal (+) of the second op amp OP2, the second op amp OP2 receives the same. The constant current flows to the first light emitting device LED1. That is, since the signal output from the second op amp OP2 is transmitted to the base of the fourth transistor Q4 through the ninth resistor R9, the fourth transistor Q4 is turned on.

Therefore, when the first light emitting device LED1 is turned on and the surroundings are contaminated by foreign matter such as dust or the like by the smoke in the room or the soft sensing device, the light receiving element PD1 may be exposed to the light receiving device PD1 by the diffuse reflection of the smoke or the foreign material. 1 Light emitted from the light emitting device LED1 is incident on the light receiving device PD1.

Therefore, the light receiving element PD1 transmits a detection signal proportional to the amount of incident light to the first op amp OP1, and the first op amp OP1 amplifies and outputs the transmitted detection signal. In this case, the second capacitor C2 and the fifth resistor R5 filter noise from an output signal of the first op amp OP1, and the filtered detection signal is input to the first input of the soft sensing controller 190. Is forwarded to port P0.

Therefore, the yearbook control unit 190 alerts the cleaning time notification or fire according to the level of the signal applied through the first input port (P0). That is, the soft-touch control unit 190 compares with the setting value stored in the memory 180, for example, if the 50 ~ 100㎂ drive the cleaning notification unit 110 to alert the cleaning time, or more than 100㎂ When the fire alarm 120 is driven to alert the fire.

In this case, as the fourth transistor Q4 is turned on, power is applied to the disconnection detection unit 170, so that the fifth transistor Q5 is turned on to low level at the second input port LED WD of the soft-sensing control unit 190. Is passed. Accordingly, the soft detection control unit 190 determines that the first light emitting device LED1 is normally driven without disconnection by a signal applied from the disconnection detection unit 170.

However, when the first light emitting device LED1 is not turned on due to disconnection or other reasons, the fifth transistor Q5 is turned off, so that the second input port LED WD of the soft sensing controller 190 has a high level. Signal is applied. Accordingly, the soft detection control unit 190 recognizes that the first light emitting device LED1 is disconnected and displays the cleaning notification unit 110 or the display unit 230 so that the user can recognize it.

In addition, the second op amp OP2 is a single power amplifier, and when the input signal is zero, the output offset value (Offset) cannot be zero. When the input signal fed back to the second op amp OP2 is zero, the fifth transistor Q5 connected to the second op amp OP2 is turned on. The second diode D2 is configured to not be turned on. Herein, the current adjustment flowing through the first light emitting device LED1 is determined by the tenth resistor R10. That is, if 1V is input to the non-inverting terminal (+) of the second op amp OP2 and the 10th resistor R10 is 100 ohm, 1/100 = 0.01A (10mA). ) Flows.

5 is a circuit diagram showing a cleaning notification unit.

Referring to FIG. 5, the cleaning notification unit 110 includes a second light emitting device LED2 having an anode connected to the soft sensing controller 190, a thirteenth resistor R13 connected to a cathode, and the thirteenth embodiment. A third capacitor C3 is connected between the resistor R13 and the cathode of the second light emitting device LED2.

When the on-signal is output from the soft detection control unit 190, the cleaning notification unit 110 is a current that is charged to the third capacitor (C3) through the thirteenth resistor (R13) is usually the second light emitting device (LED2). A cleaning notice is displayed by applying to. Here, the second light emitting device LED2 emits light for a current time charged in the third capacitor C3, and is turned off when the current charged in the third capacitor C3 is discharged. After the second light emitting device LED2 is turned off, for example, the soft detection controller 190 has a standby mode for the next 3 seconds, and outputs an off signal when waking up to the standby mode. The capacitor C3 is allowed to charge the current for a predetermined time. When the predetermined time is completed, the on-signal is output again to turn on the second light emitting device LED2 through the current charged in the third capacitor C3. In this way, the soft detection control unit 190 may reduce the current consumption by controlling the cleaning notification unit 110 by repeating the on, standby mode, off, on.

Although the detailed description of the subject innovation has been described by taking specific embodiments of the subject innovation as an example, the subject innovation is not limited thereto, and the present invention has a general knowledge in the technical field to which the subject innovation belongs without departing from the concept of the subject innovation. It is obvious that the modification or change in various forms by the person is also included in the concept of the present invention.

As described above, the soft detection device having the cleaning notification function according to the present invention automatically displays the cleaning time when the soft detection device is contaminated with dust or other foreign substances, so that the user is easy to manage, and also prevents malfunction due to dust. It can be effective.

Claims (10)

It is driven by a predetermined power source to detect the degree of pollution and smoke, and amplifies the detected signal to display a cleaning notification if the detection signal falls within a predetermined level range, and fire alarm if the detection signal is above a certain level. A soft sensing member to be executed; A signal transmitting unit which transmits an input / output signal of the soft sensing member; And a driving control member for setting a soft detection level or a cleaning level in the detection signal measured by the soft sensing member through the signal transmission unit, and displaying a set level and an operation signal of the soft sensing member. This added soft-sensing device. The method of claim 1, wherein the soft sensing member A cleaning notification unit to alert the cleaning time; A fire alarm unit for outputting a fire alarm; An amplifying circuit power supply unit for transmitting power; A soft-sensing unit which is driven by the power supplied from the amplifying circuit power unit and detects smoke and outputs a soft-sensing signal; A first amplifying means which is turned on by the power delivered from the amplifying circuit power supply unit and amplifies the detection signal transmitted from the soft sensing unit, and a noise filtering means connected to an output terminal of the first amplifying means to remove noise of the output signal; An amplifier comprising a; A constant current unit which maintains the driving signal of the soft sensing unit as a constant signal; When the annual detection signal transmitted from the amplification unit falls within a predetermined level, the cleaning notification unit is controlled to display a cleaning notification time. When the annual detection signal is above a predetermined level, the fire alarm unit controls the fire to alarm the fire. Soft sensing device with a cleaning notification function, characterized in that it comprises a constant current unit. The method of claim 2, wherein the soft sensing member And a memory for storing the setting signal transmitted from the driving agent member. The method of claim 2, wherein the year-end detection unit A light emitting device having a first electrode connected to an output side of the amplifying circuit power supply unit; And a light receiving element having a second electrode connected to an input side of the first amplifying means. The method of claim 2, wherein the constant current unit First constant current means for maintaining a drive signal output from the soft sensing means at a constant level; Voltage dividing means for dividing a signal of a predetermined level output from the first constant current means; Second amplifying means connected to an output side of the voltage distribution means at a non-inverting terminal; First switching means for connecting a first electrode to said light emitting element, and a second electrode to said second amplifying means to be turned on by an output signal of said second amplifying means to drive said light emitting element; And a second constant current means connected to the third electrode of the first switching means to set the output offset value to zero when the input of the second amplifying means is zero. This added soft-sensing device. The method of claim 5, wherein the second constant current means comprises a first resistor connected to the third electrode of the first switching means, and a diode connected to the first electrode on one side of the first resistor, characterized in that Yearbook detector with cleaning reminder. The method of claim 2, wherein the disconnection detecting unit A first electrode connected to a predetermined power source, and second switching means connected to a second electrode between the first switching means and the second constant current means, By connecting the constant current unit between the first electrode and the power supply of the second switching means, when the off signal is transmitted to the first switching means, outputting the disconnection detection signal of the light emitting device to the soft-sensing control unit. Yearly detection device with cleaning notification function. The method of claim 2, wherein the cleaning notification unit A second light emitting device having a first electrode connected to the soft sensing control unit, a second resistor connected to a second electrode of the second light emitting device at one side, a second electrode of the second light emitting device, and the second resistor; And a first capacitor connected in parallel between the first capacitor and a power supply terminal for supplying power from the other side of the second resistor. The soft detection control unit repeatedly drives the standby mode for a predetermined time, and then a cleaning notification function is added to the cleaning device by alerting the cleaning time by turning on the second light emitting element for a predetermined time shorter than the predetermined time. Smoke detector. The method of claim 1, wherein the drive control member A power control unit transferring power of the constant current unit through the signal transmission unit; A display unit which displays a predetermined image according to a soft detection signal or a cleaning notification signal output from the constant current unit; A drive controller for controlling the soft-detector power supply control unit and the display unit through the signal transmission unit; And a key input unit for inputting a user's operation signal. The method of claim 9, wherein the power control unit A third switching means connected to the signal transmission part, and a fourth switching means connected to the third switching means at a first electrode and connected to the driving control part at a second electrode, And the driving control unit turns on / off the power of the soft sensing member by driving control of the third switching means by turning on / off the fourth switching means.

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