KR101673840B1 - AC control-typed temperature controlling apparatus and method for preventing a fire caused by the fixing of the microcomputer - Google Patents

AC control-typed temperature controlling apparatus and method for preventing a fire caused by the fixing of the microcomputer Download PDF

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KR101673840B1
KR101673840B1 KR1020160021434A KR20160021434A KR101673840B1 KR 101673840 B1 KR101673840 B1 KR 101673840B1 KR 1020160021434 A KR1020160021434 A KR 1020160021434A KR 20160021434 A KR20160021434 A KR 20160021434A KR 101673840 B1 KR101673840 B1 KR 101673840B1
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South Korea
Prior art keywords
heater
heating
temperature
power controller
heating wire
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KR1020160021434A
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Korean (ko)
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KR20160040477A (en
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길종진
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길종진
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/20—AC or DC potentiometric measuring arrangements
    • G01R31/021—
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/185—Electrical failure alarms
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

More particularly, the present invention relates to an apparatus and a method for accurately controlling the temperature of a heating line by accurately analyzing a detection position and a distortion of a temperature signal waveform and a heater current waveform in synchronization with an AC sine wave signal , Abnormal operation of the heater power controller. The present invention relates to an AC synchronous control type electrothermal bedding temperature control device having a fault diagnosis function such as a temperature detection line break of a heater, a heater power controller, and a fire prevention function by failing a micom, .

Description

[0001] The present invention relates to an AC synchronous control type thermostatic bed temperature control device having a fire prevention function by a microcomputer failure,

More particularly, the present invention relates to an apparatus and a method for accurately controlling the temperature of a heating line by accurately analyzing a detection position and a distortion of a temperature signal waveform and a heater current waveform in synchronization with an AC sine wave signal , Abnormal operation of the heater power controller. The present invention relates to an AC synchronous control type electrothermal bedding temperature control device having a fault diagnosis function such as a temperature detection line break of a heater, a heater power controller, and a fire prevention function by failing a micom, .

Generally, electro-thermal bedding such as electric mat, electric bed, electric bed, etc. is provided with a temperature regulating device for regulating the temperature of the electro-thermal bedding.

Normally, the thermostat of the thermo-linen type uses a heating wire having an NTC (nylon) thermistor embedded therein. In addition, such a temperature controller is driven in synchronization with an alternating current (AC) sinusoidal signal.

However, the conventional temperature control device can not accurately analyze the detection position and the distortion of the temperature signal waveform and the heater current waveform of the NTC nylon thermistor in synchronization with the AC sinusoidal wave.

In addition, the conventional temperature control device has a problem that it can not detect an abnormal operation of a heater power controller including a thyristor (SCR), which may cause a fire.

In addition, the conventional temperature control device has a problem that it is not known whether the temperature detection line (NTC thermistor) of the heating wire heater is disconnected.

In addition, when the DC voltage is continuously input to the heater power controller due to a malfunction of the microcomputer, the conventional thermostat may cause a fire due to overheating of the heating wire heater because the heating wire heater is continuously heated.

Patent No. 0886662

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to accurately analyze the detection position and distortion of a temperature signal waveform and a heater current waveform in synchronization with an AC sinusoidal signal to more accurately control the temperature of the heating line, and to perform an abnormal operation of the heater power controller. There is provided an AC synchronous control type electrothermal bed liniment temperature control device having a fault diagnosis function such as a temperature detection line break of a heater and a fire prevention function due to a failure of a microcomputer which cuts off a fire caused by a failure of the heater power controller and a micom have.

According to a first aspect of the present invention, there is provided an AC synchronous control type electrothermal bedding temperature control device having a fire prevention function by a microcomputer failure, comprising: an AC synchronous signal corresponding to an AC power input in a sinusoidal waveform; An AC synchronization detector for outputting an AC signal; An AC power cut-off unit connected in series with an AC power source for supplying AC power and supplying or cutting off the input AC power by being turned on or off under control; A heating wire heater including a first heating wire, a second heating wire, and an NTC thermistor formed between the first heating wire and the second heating wire, and a heating wire heater connected in series with the heating wire heater, A heating circuit portion including a heater power controller for causing a heater current corresponding to the power source to flow; Detecting the positive and negative zero-crossing positions and peak positions of the AC synchronous signal, controlling the heating circuit section from the positive zero-crossing position detection to control the heating current to flow through the heating wire heater, detecting a negative zero-crossing position A microcomputer for measuring a temperature by the NTC thermistor when a peak position is detected and controlling the heater power controller by comparing the measured temperature with a predetermined temperature; And a heater power controller ON signal which is connected between the microcomputer and the heater power controller and is output from the microcomputer to the heater power controller, passes the heater power controller ON signal, cuts off the DC voltage when a DC voltage is input And a fire blocker for outputting a heater power controller off signal to the heater power controller.

The heating wire heater further includes a diode having an anode connected to the other end of the first heating line receiving a heating signal from the AC power source at one end thereof and a cathode connected to one end of the second heating line, And the other end of the second heating line is connected to the heater power controller and the temperature measuring unit.

The apparatus includes: a first resistor receiving a DC power at one end thereof; a second resistor having one end connected to the other end of the first resistor and the other end connected to the micom; A third resistor connected to the two heating lines, and a fourth resistor connected to one end of the third resistor and grounded at the other end; A temperature detection line disconnection detecting unit having one end connected to both terminals of the AC power source and the other end connected to one end of the second heating line to transmit a temperature signal during disconnection of the NTC thermistor which is the temperature detection line of the heating line heater; And a display unit for displaying information and providing information to a user, wherein the heating wire heater is configured such that one end of the first heating wire is connected to both terminals of the AC power source and the other end is connected to a heater power controller, One end of the two heating lines is connected to both terminals of the AC power source and the other end is connected to the other end of the third resistor. The microcomputer examines a temperature detection signal inputted through the second resistor in a temperature detecting operation period Detecting whether the temperature detection line is a temperature detection line disconnection signal by the temperature detection line disconnection detection unit and, if the signal is a temperature detection line disconnection signal, displaying a disconnection of the temperature detection line through the display unit to notify that the temperature detection line is disconnection .

The apparatus includes: a first resistor receiving a DC power at one end thereof; a second resistor having one end connected to the other end of the first resistor and the other end connected to the micom; And a fourth resistor connected to one end of the third resistor and grounded at the other end, wherein the one end of the first heating line is connected to the AC power supply, One end of the second heating line is connected to the other end of the second heating line and the other end of the third resistance of the temperature measuring unit is connected to the other end of the source.

According to another aspect of the present invention, there is provided an AC synchronous control type electrothermal bedding temperature control device having a fire prevention function due to a failure of a microcomputer, comprising: An AC synchronization detector for outputting an AC signal; An AC power cut-off unit connected in series with an AC power source for supplying AC power and supplying or cutting off the input AC power by being turned on or off under control; A heating wire heater including a first heating wire, a second heating wire, and a synthetic resin insulating layer formed between the first heating wire and the second heating wire; and a heating wire heater connected in series with the heating wire heater, A heating circuit portion including a heater power controller for causing a heater current corresponding to the AC power to flow; A microcomputer for detecting positive and negative zero-crossing positions and peak positions of the AC synchronous signal and controlling a heating circuit unit from a positive zero crossing position to control a heating current to flow through a heating wire heater; And a heater power controller ON signal which is connected between the microcomputer and the heater power controller and is output from the microcomputer to the heater power controller, passes the heater power controller ON signal, cuts off the DC voltage when a DC voltage is input And a fire blocker for outputting a heater power controller off signal to the heater power controller.

The present invention has the effect of measuring the temperature and the heater current more precisely by detecting the zero crossing position and the peak position of the accurate AC sine wave and measuring the temperature signal and the heater current by detecting the detected zero crossing position and peak position .

Further, the present invention detects an accurate zero-crossing position of an AC sine wave and outputs a heater power controller ON signal, which is a trigger signal provided to the heater power controller at the detected zero crossing position, so that the heater power controller can be controlled more accurately . That is, the present invention has the effect of performing more accurate temperature control.

Further, according to the present invention, the accurate trigger signal is output at the zero crossing position of the AC sine wave signal as described above, and the heater current of the heater current outputted through the heater power controller is measured for both the positive and negative sections of the sine wave It is possible to detect an abnormality such as short-circuit, disconnection, connection failure, etc. of the heater power controller.

The present invention can detect the abnormality of the heater power controller, so that the AC power supply is cut off when the heater power controller is short-circuited, so that the user is prevented from burning or fire due to overheating due to short- .

In addition, the present invention has an effect of enabling a user to quickly perform a failure process by detecting whether or not the heating wire heater is disconnected and displaying the failure of the heating wire heater.

In addition, the present invention has a fire cutoff unit to cut off the DC power that can be input to the heater power controller in case of a failure of the microcomputer, thereby preventing a fire caused by driving the heater power controller continuously.

FIG. 1 is a view showing a configuration of an AC synchronous control type electrothermal acupuncture bed temperature control device having a fire prevention function by a microcomputer failure according to the present invention.
2 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature controller having a fault diagnosis function according to a first embodiment of the present invention.
FIG. 3 is a view illustrating an example of wiring of a heating wire heater of an AC synchronous control type electrothermal bed liniment temperature control device having a fire prevention function by a microcomputer failure according to an embodiment of the present invention.
4 is an equivalent circuit diagram and signal flow direction according to an AC sine wave of a first wiring example of a heating wire heater of an AC synchronous control type thermo-linen bed temperature control device having a fire prevention function by a microcomputer failure according to an embodiment of the present invention FIG.
5 is a diagram showing an equivalent circuit diagram and signal flow direction according to an AC sine wave in the second wiring example of a heating wire heater of an AC synchronous control type electrothermal bedding temperature control device having a fire prevention function by a microcomputer failure according to an embodiment of the present invention Fig.
6 is a diagram showing input / output waveforms according to the present invention.
7 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a diagnosis function according to a second embodiment of the present invention.
8 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a fault diagnosis function according to a third embodiment of the present invention.
9 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a fault diagnosis function according to a fourth embodiment of the present invention.
10 is a circuit diagram of an AC synchronous control type electrothermal bed liniment temperature control device having a fire prevention function due to a failure of a microcomputer according to a fifth embodiment of the present invention.
11 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a fire prevention function by a microcomputer failure according to a sixth embodiment of the present invention.
FIG. 12 is a circuit diagram of an AC synchronous control type electro-paced bed temperature control device having a fire prevention function due to a failure of a microcomputer according to a seventh embodiment of the present invention.
13 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a fire prevention function due to a failure of a microcomputer according to an eighth embodiment of the present invention.
14 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a fire prevention function by a microcomputer failure according to a ninth embodiment of the present invention.
FIG. 15 is a flowchart illustrating an AC synchronous control type electro-paced bed temperature control method according to the present invention.
FIG. 16 is a flowchart illustrating a method for determining abnormality in a circuit of the AC synchronous control type bedding thermostat according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and operation of an AC synchronous control type electrothermal bed liniment temperature control apparatus according to the present invention will be described with reference to the accompanying drawings, and a temperature control method in the apparatus will be described.

FIG. 1 is a view showing the configuration of an AC synchronous control type electrothermal acupuncture bed temperature control device having a fire prevention function by a microcomputer failure according to the present invention. FIG. 3 is a circuit diagram showing an example of wiring of a heating wire heater of an AC synchronous control type electrothermal bed liniment temperature control device having a fire prevention function by a microcomputer failure according to an embodiment of the present invention. 4 is an equivalent circuit diagram and signal according to an AC sine wave of the first wiring example of the heating wire heater of the AC synchronous control type thermo-linen bed temperature control apparatus having the fire prevention function by the microcomputer failure according to the embodiment of the present invention. FIG. 5 is a view showing a flow direction of the microcomputer according to the embodiment of the present invention. FIG. Stream synchronization is a diagram showing the equivalent circuit and the signal flow direction in accordance with an alternating sinusoidal wave when the second wiring example of regulating heat transfer bedding heating line of the heating temperature control, Fig. 6 is a diagram illustrating input and output waveforms in accordance with the present invention. Hereinafter, a description will be given with reference to Figs. 1 to 6. Fig.

The AC synchronous control type electrothermal bed liniment temperature control device having a fire prevention function due to a failure of a microcomputer according to the present invention includes a microcomputer 100, an AC power input unit 200, an AC synchronous detection unit 250, a power source unit 300, a display unit 400 An AC power cut-off unit 500, a temperature detection line disconnection detecting unit 900, and a fire cutoff unit 1000 according to an embodiment of the present invention, and includes an input unit 600, a heating circuit unit 700, May be further included.

The microcomputer 100 controls the overall operation of the synchronous controlled alternating current thermo-linen temperature controller according to the present invention. In particular, the microcomputer 100 controls the operation of the temperature adjusting device in synchronization with the AC sine wave as shown in (A) of FIG. 6 through the AC synchronization detecting unit 250, Controls the operation, and controls the temperature detection operation in the negative waveform. That is, the microcomputer 100 calculates a zero crossing point (or "zero crossing", a "zero crossing position") and a peak point (or "peak") of the AC sine wave from the AC synchronizing signal input through the AC synchronizing detecting section 250, Quot; peak position "), and controls the operation of the temperature control device according to the present invention by the detected zero crossing point and the peak point of the positive waveform and the negative waveform. The detailed operation of the microcomputer 100 will be described in detail with reference to FIG. 15 to be described later.

The AC power input unit 200 receives and supplies a sine wave AC power from the AC power source. The AC power source may be an outlet for supplying 110 V or 220 V AC power to the house. The AC power input unit 200 may include a fuse that is disconnected at a predetermined temperature or higher.

The AC synchronization detecting unit 250 detects the AC sine wave supplied through the AC power input unit 200 and outputs the AC synchronizing signal to the microcomputer 100 as shown in the upper part of FIG. The AC synchronizing signal may be a signal whose AC power source is reduced in size. The AC synchronization detector 250 may be constituted by a resistor as shown in FIG.

The power supply unit 300 receives AC power input through the AC power input unit 200 and generates DC power VCC to be output to the microcomputer 100 and the input unit 600. The DC power source may be 5V or the like. The power supply unit 300 receiving the AC power and generating the DC power is a well known technique to those skilled in the art, so that detailed description thereof will be omitted.

The display unit 400 includes at least one or more of a light emitting diode and a liquid crystal display (LCD), and is controlled by the microcomputer 100 to control the heater power controller 720 of the heating circuit unit 700, Whether or not the temperature detection line is disconnected, and the like. When the display unit 400 is constituted by a heater power controller abnormality display light emitting diode and a temperature detection wire disconnection display light emitting diode, the heater power controller abnormality indicator light emitting diode is connected to the microcomputer 100 when the heater power controller 720 is abnormal. And the temperature detection line disconnection display LED is turned on and blinks under the control of the microcomputer 100 to detect the temperature detection line disconnection when the temperature detection line disconnection is detected, It will indicate that the detection line is disconnected. When the display unit 400 is constituted by an LCD, the microcomputer 100 monitors various information according to the abnormal type of the heater power controller 720 when the heater power controller 720 is abnormal, that is, the damage of the heater power controller 720 Failure information such as disconnection, short circuit, contact failure, etc., may be displayed and information indicating that the temperature detection line is disconnected at the time of disconnection of the temperature detection line may be displayed. The temperature detection line may be the NTC thermistor 713 shown in FIGS.

The AC power cutoff unit 500 is connected in series to the AC power input unit 200 and is controlled by the microcomputer 100 so that the entire AC power input unit 200 The power supply unit 300, the display unit 400, the heating circuit unit 700, the temperature measuring unit 800, the temperature detection line disconnection detecting unit 900, and the like) or disconnects the supplied AC power .

The AC power cutoff unit 500 is connected in series to the AC power input unit 200 and is turned off upon input of a trip signal to turn off the AC power supplied from the AC power input unit 200, A trip signal generator 510 for generating a trip signal under the control of the microcomputer 100 and turning off the trip switch 510 by the generated trip signal, 520). Instead of the trip switch 510, a transistor, a relay, or the like may be applied.

The trip signal generator 520 includes a resistor 522 whose one end is connected to one end of the trip switch 510 by soldering and which dissipates the solder when the alternating current flows to disconnect the trip switch 510, And is connected in parallel to the resistor 522 and is connected in parallel to the AC power input unit 200 to be turned on and off under the control of the microcomputer 100. The AC current is supplied to the resistor 522 as the trip signal And a first thyristor 521 for controlling the flow of the first thyristor 521.

The input unit 600 receives the DC power generated by the power supply unit 300 and operates the temperature input signal to the microcomputer 100 according to the temperature setting signal set by the user using the temperature control jog dial. The input unit 600 receives DC power from the power supply unit 300 and supplies DC power distributed by the first resistor 610 and the second resistor 620 to the microcomputer 100 as a temperature setting signal, . The temperature control jog dial may be constituted by a second resistor 620 which is a variable resistor as shown in FIG.

The heating circuit unit 700 includes a heating wire heater 710 that is heated by receiving a heater current and a heater power controller 720 that controls the heater current to flow to the heating wire heater 710 under the control of the microcomputer 100, A heater current detector 730 for detecting a heater current flowing through the heating wire heater 710 and outputting a heater current detection signal to the microcomputer 100 and a heater power controller 720 to detect whether or not the heater power controller conduction presence / To the microcomputer (100).

3, the heating wire heater 710 includes a core 711, a first heating wire 712 wound on an outer circumferential surface of the core 711, an NTC thermistor (not shown) surrounding the upper portion of the first heating wire 712, 713), a second heating line 714 wound on the NTC thermistor, and a cover 715 surrounding the upper portion of the second heating line 714. The NTC thermistor 713 is for detecting the temperature according to the present invention and is also referred to as a temperature detection line. The heating wire heater 710 may be formed of a synthetic resin insulating layer for insulating the first heating wire 712 and the second heating wire 714 instead of the NTC thermistor. If a synthetic resin (insulating layer) is formed instead of the thermistor, a temperature sensor connected to at least one of the first heating line 712 and the second heating line 714 may be further provided for measuring the temperature.

The heating wire heater 710 is connected to the other end of the first heating wire 712 and the diode 716 so that one end of the second heating wire 714 is connected to the other end of the first heating wire 712, The first heating line 712 and the second heating line 714 may be independently connected to each other as shown in FIG. 3 (B) and FIG. 7 to be described later, and the first heating line 712 May be connected to each other.

The heater current flows through the first heating line 712, the diode 716 and the second heating line 714 as shown in FIG. 4 (a) during the heating operation period of FIG. 6, The temperature current (signal) during the temperature detection operation period of FIG. 6 (a) is applied to the second heating line 714, the NTC thermistor 713 and the first heating line 712 ). The temperature current value reflecting the resistance value of the NTC thermistor 713 is supplied to the temperature measuring unit 800. At this time, the temperature measuring unit 800 outputs a temperature detection signal corresponding to the temperature current value to the microcomputer 100. The NTC thermistor 713 is heated by the heater current flowing through the first heating line 712 and the second heating line 714 and the thermistor 713 of the NTC thermistor 713 is heated according to the heating temperature, The resistance value changes. The capacitance value between the first heating line 712 and the second heating line 714 also changes due to this changing NTC thermistor resistance value. The value of the temperature current flowing to the temperature measuring unit 800 through the NTC thermistor 713 is changed by the composite impedance value varying with the temperature. The temperature current is applied to the DC bias voltage of the resistor 830 and the resistor 840 and inputted to the microcomputer 100 as a temperature detection signal.

6, the heater current flows through the first heating line 712 as shown in FIG. 5 (a) during the heating operation period of FIG. 6, and during the temperature detection operation period, The current flows through the second heating line 714, the NTC thermistor 713, and the first heating line 712 as shown in (B) and (D) of FIG.

The heater power controller 720 is connected in series to the heating wire heater 710 and receives a heater power control signal from the microcomputer 100 to be turned on and off so that a heating current flows through the heating wire heater 710 . The heater power controller 720 may include a thyristor 722 as shown in FIG.

The heater current detection unit 730 and the controller failure diagnosis unit 740 may not be applied, and at least one of the heater current detection unit 730 and the controller failure diagnosis unit 740 may be selectively applied.

The heater current detector 730 includes a resistor 731 as shown in FIG. 2 and transmits a heater current detection signal according to a heater current value passed through the heater power controller 720 to the microcomputer 100. The heater current detection signal should only flow in the heating operation section of the AC synchronous signal, and should not flow in the temperature control section. If the heater current is detected through the heater current detection unit 730 in the temperature control period, the heater power controller 720 may be short-circuited.

That is, if there is no trigger signal in the heater power controller 720 but the heater current is detected in the heating operation period, the heater power controller 720 operates abnormally.

If the heater current flowing through the heater power controller 720 in the heating operation period is not detected, it can be determined that the heater power controller 720 is disconnected.

The controller failure diagnosis unit 740 may be configured between the heating wire heater 710 and the heater power controller 720 to control the heater power controller ON signal or the heater power controller OFF signal according to the ON or OFF state of the heater power controller 720 And outputs it to the microcomputer 100. Then, when the heater power controller OFF signal is input or when the heater power controller OFF signal is input (temperature detection interval) when the heater power controller ON signal is input (heating operation section), the power control ON signal The heater power controller 720 determines that the heater power controller 720 operates abnormally and displays it through the display unit 400.

The temperature measuring unit 800 receives a temperature current signal corresponding to the temperature of the heating wire heater 710 and outputs a temperature detecting signal to the microcomputer 100.

The temperature measuring unit 800 includes a first resistor 810 receiving DC power at one end thereof, a second resistor 820 connected at one end to the other end of the first resistor 810 and the micom 100, A third resistor 830 whose one end is connected to the other end of the resistor 820 and whose other end is connected to the second heating line 714 of the heating wire heater 710 and a third resistor 830 connected to one end of the third resistor 830, And a fourth resistor 840 that is grounded.

7, 10, and 13, when the first heating line 712 and the second heating line 714 of the heating wire heater 710 are configured independently of each other, And is connected between the both terminals of the first heating wire 200 and the second heating wire 714 of the heating wire heater.

The temperature detecting line disconnection detecting unit 900 operates in conjunction with the temperature measuring unit 800 and outputs a temperature detecting line disconnection signal according to whether the NTC thermistor 713 which is a temperature detecting line is disconnected through the temperature measuring unit 800 And outputs it to the microcomputer 100. That is, the temperature measuring unit 800 outputs a temperature detection line disconnection signal to the microcom 100 as a temperature detection line disconnection signal generated by the temperature detection line disconnection detecting unit 900 when the NTC thermistor 713 is disconnected will be.

The fire shielding unit 1000 is configured in a heater power control line input from the microcomputer 100 to the heater power controller 720 to shut off the DC power that can be input to the heater power controller 720 when the microcomputer 100 fails And turns off the heater power controller 720. The fire cutoff unit 1000 may be constituted by a capacitor as shown in FIGS. That is, when the heater power controller ON signal is input as a continuous DC signal instead of the trigger signal, which is an AC signal, the fire intercepting unit 1000 according to the present invention uses the characteristic of the capacitor to block the DC current, . That is, the input of the heater power controller ON signal as the DC signal means that the microcomputer 100 operates abnormally due to a failure or the like.

7 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a diagnosis function according to a second embodiment of the present invention.

7 shows a circuit diagram of the AC synchronous control type electrothermal bed liniment temperature regulating device in which the first heating line 712 and the second heating line 714 of the heating wire heater 710 are independently connected to each other .

7 shows a case where the heating circuit unit 700 includes only the controller fault diagnosis unit 740 among the heater current detection unit 730 and the controller fault diagnosis unit 740 and the temperature detection line disconnection detection unit 900 is configured Fig.

FIG. 8 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a fault diagnosis function according to a third embodiment of the present invention, in which the first heating line 712 and the second heating line 714 are independently connected And the heating circuit unit 700 includes only the controller fault diagnosis unit 740 of the heater current detection unit 730 and the controller fault diagnosis unit 740, In which the temperature detecting wire disconnection detecting portion 900 is constituted.

Even if one temperature sensing wire is disconnected by connecting both ends of the second heating wire 714, the microcomputer 100 can normally detect the temperature through the temperature measuring unit 800. [

FIG. 9 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature adjusting apparatus having a failure diagnosis function according to a fourth embodiment of the present invention, in which a heating wire heater 710 is connected to a first heating wire The first heating line 712 and the second heating line 714 are connected between the end of the first heating line 712 and one end of the second heating line 714 so that the heating circuit unit 700 is connected to the heater current detection unit 730 and the controller failure diagnosis unit 740 and the temperature control apparatus of the present invention includes the fire shutoff unit 1000. [

10 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control device having a fire prevention function due to a failure of a microcomputer according to a fifth embodiment of the present invention. The first heating line 712 and the second heating line 712 of the heating wire heater 710 The second heating line 714 is independently connected and the heating circuit unit 700 includes the controller failure diagnosis unit 740 and the temperature control device of the present invention is connected to the temperature detection line disconnection detecting unit 900 and the fire shutoff unit 1000 ). ≪ / RTI >

11 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control device having a fire prevention function due to a failure of a microcomputer according to a sixth embodiment of the present invention. The first heating line 712 and the second heating line 714, The heating circuit unit 700 includes the controller failure diagnosis unit 740 and the temperature control unit of the present invention is connected to the fire cutoff unit 1000. [ Fig.

Even if one temperature sensing wire is disconnected by connecting both ends of the second heating wire 714, the microcomputer 100 can normally detect the temperature through the temperature measuring unit 800. [

12 is a circuit diagram of an AC synchronous control type electro-paced bed temperature control device having a fire prevention function due to a failure of a microcomputer according to a seventh embodiment of the present invention. A diode 716 is formed between the end of the first heating line 712 and one end of the second heating line 714 to connect the first heating line 712 and the second heating line 714, 1000, respectively.

13 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control apparatus having a fire prevention function due to a failure of a microcomputer according to an eighth embodiment of the present invention. The first heating line 712 and the second heating line 712 of the heating wire heater 710 The second heating line 714 is connected independently and the temperature control device according to the eighth embodiment of the present invention includes the temperature detection line disconnection detecting portion 900 and the fire shutoff portion 1000. [

As shown in FIGS. 8 and 13, it can be seen that the temperature detection line disconnection detection unit 900 is applied to the case where the first heating line 712 and the second heating line 714 are independently connected.

14 is a circuit diagram of an AC synchronous control type electrothermal acupuncture bed temperature control device having a fire prevention function due to a failure of a microcomputer according to a ninth embodiment of the present invention. The first heating line 712 and the second heating line 712 of the heating wire heater 710 The second heating line 714 is connected independently, both ends of the second heating line 714 are connected to each other, and the temperature control device includes the fire blocking part 1000.

FIG. 15 is a flowchart illustrating an AC synchronous control type electro-paced bed temperature control method according to the present invention.

15, when the power is supplied, the microcomputer 100 controls the AC synchronous detection unit 250 to detect the zero crossing position, the positive peak point, and the negative peak point of the AC sine wave, (S111).

When the AC synchronizing signal is inputted, the microcomputer 100 judges whether the circuit is safe (or abnormal) by the input signal such as the trigger signal, the temperature detecting signal, the heater current detecting signal, and the temperature detecting line disconnection signal according to the synchronizing signal S113). The safety determination method of the circuit will be described in detail with reference to FIG. 11 to be described later.

If there is no abnormality in the circuit, the microcomputer 100 measures the temperature of the hot wire by the NTC thermistor 713 through the temperature measuring unit 800 in the temperature detecting operation period (S115).

The microcomputer 100 determines whether the temperature measured by the NTC thermistor 713 is lower than a preset reference value of the hot-wire temperature (S117).

When the measured temperature is lower than the hot-wire temperature reference value, the microcomputer 100 synchronizes with the zero-crossing detection so that the heater current can continuously flow through the heating wire heater 710 during the heating period, To the controller 720, that is, to the gate of the SCR (S119). When the heater power controller 720 outputs a trigger signal, the heater power controller 720 will normally be turned on to flow heater current.

The microcomputer 100 outputs the trigger signal to the heater power controller 720 and then determines whether the heater power controller 720 operates normally through the heater current detector 730 or the controller failure diagnosis unit 740 ).

If the heater current is not detected through the heater current detector 730 and the controller failure diagnosis unit 740 or the heater power controller conduction signal is not the heater power controller conduction signal after the output of the trigger signal, the microcomputer 100 outputs the heater power The controller 720 determines that the controller 720 is disconnected, generates an alarm, stops the operation, and indicates that the heater power controller 720 is disconnected through the display unit 400. If the display unit 400 is an LED, the heater power controller 720 can be notified that the heater power controller 720 is blown.

On the other hand, if the heater current is detected or the heater power controller conduction signal is a heater power controller conduction signal, the microcomputer 100 determines that the heater power controller 720 normally operates, The heating wire temperature is measured by the heating wire 712 and the second heating wire 714 (S123), and it is determined whether the measured resistance wire heating wire temperature is higher than a preset resistance wire heating wire temperature reference value (S125).

As a result of the determination, when the measured resistance coefficient heat ray temperature is higher than the reference value, the microcomputer 100 delays the output of the trigger signal for a predetermined number (n) cycles of the AC synchronization signal (S127), lowers the temperature of the heating wire heater 710 And the safety operation is performed by adjusting the temperature to be constant.

The microcomputer 100 compares the temperature of the NTC thermistor on the basis of the negative sinusoidal peak value of the AC synchronous signal as shown in FIG. 6 (b) And outputs the trigger signal to the SCR of the heater power controller 720 in the zero crossing.

Also, the microcomputer 100 measures and compares the heater current based on the positive peak value of the sinusoidal wave of (C) in FIG. 6, and performs the control operation according to the comparison / analysis result.

If the sinusoidal signal is cut off or cut off when the microcomputer 100 reads the waveform, it is regarded as a connection failure of the connection portion and an alarm is generated. The supply of the AC power is interrupted through the AC power cutoff unit 500 to stop the heating operation.

The alarm generation and the heating operation stop may be generated when the heater current in the heating operation section is not detected but the current is detected in the temperature detection operation section in which the heater current should not be detected in the circuit abnormality determination, It may be generated when the heater power controller ON signal is input in the temperature detection operation period or when the heating wire heater 710 is overheated.

Upon occurrence of the alarm, the microcomputer 100 determines whether an alarm has been generated due to the abnormal electrical conduction of the heater power controller 720 (S133). If the heater power controller 720 becomes abnormal and an alarm is generated, 510) to shut off the AC power (S135).

FIG. 16 is a flowchart illustrating a method for determining abnormality in a circuit of the AC synchronous control type bedding thermostat according to the present invention.

The circuit anomaly detection method will be performed during one cycle of the AC synchronization signal.

More specifically, the microcomputer 100 determines whether or not there is a heater current according to the AC synchronization, whether or not the heater power controller is in operation (S211), and determines whether the heater power controller 720 is abnormal (S213). That is, the microcomputer 100 determines whether the heater current is detected through the heater current detector 730 in the heating operation period or the heater power controller conduction signal is inputted as the heater power controller conduction signal from the controller failure diagnosis unit 740, It is checked whether the heater current is not detected during the interval or the heater power controller shut-off signal is inputted from the controller failure diagnosis unit 740 as the heater power controller continuity signal. If the heater current is not detected through the heater current detector 730 in the heating operation period or the heater power controller shutoff signal is input from the controller failure diagnosis unit 740, it is determined that the heater power controller 720 is disconnected When the heater current is detected through the heater current detector 730 in the temperature detection operation period or the heater power controller conduction signal is inputted from the controller failure diagnosis unit 740, it can be determined that the heater power controller 720 is short-circuited will be.

If it is determined that there is no abnormality such as disconnection or short-circuit of the heater power controller 720 according to whether the heater current is abnormal or whether the heater power controller 720 is conductive, the microcomputer 100 determines that the NTC thermistor 713 And the NTC thermistor 713 are disconnected (when the temperature detecting wire disconnection detecting portion 900 is provided) (S215), and it is determined whether or not the NTC thermistor 713 is short-circuited or disconnected (S217 ). If the short circuit between the first heating line 712 and the second heating line 714 results in a short-circuit determination of the NTC thermistor, the voltage of the negative power cycle of the AC power source, i.e., the temperature detection operation period becomes maximum, And it can be judged by this change value. In the disconnection judgment of the NTC thermistor 713, since the temperature signal flows through the temperature detecting wire disconnection detecting section 900 as described above at the time of disconnection of the NTC thermistor 713, the voltage value of the temperature detecting signal varies accordingly So that it can be judged that it has been broken.

If there is no abnormality in the NTC thermistor 713, the microcomputer 100 measures the temperature of the heating wire heater 710 by the NTC thermistor 713 in the temperature detecting operation period (S219). In the heating operation section, 800) to measure the temperature of the hot wire by the thermal resistance internal temperature coefficient (S221).

If the temperature of each of the heating operation section and the temperature detection operation section is measured, the microcomputer 100 compares the measured temperature with a predetermined reference temperature for determining whether or not the heating wire heater 710 is overheated (S223).

If overheating has not occurred, the microcomputer 100 completes preparation for operation (S225), and performs the processes after S115 of FIG. 10 described above.

On the other hand, if the heater power controller 720 is abnormal, the NTC thermistor 713 is shorted or disconnected, or the heating wire heater 710 is overheated, the process after S131 of FIG. 15 will be performed.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be easily understood. It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, it is intended to cover various modifications within the scope of the appended claims.

100: Microcomputer 200: AC power input unit
250: AC synchronization detection unit 300: Power supply unit
400: Display unit 500: AC power cut-
510: Trip switch 520: Trip signal generator
530 thyristor 600 input
700: Heating circuit part 710: Heating wire heater
720: Heater power controller 730: Heater current detector
800: Temperature measuring unit 900: Temperature detecting line disconnection detecting unit
1000: Fire blocker

Claims (5)

An AC synchronous detector for outputting an AC synchronous signal corresponding to an AC power inputted in a sinusoidal waveform;
An AC power cut-off unit connected in series with an AC power source for supplying AC power and supplying or cutting off the input AC power by being turned on or off under control;
A heating wire heater including a first heating wire, a second heating wire, and an NTC thermistor formed between the first heating wire and the second heating wire, and a heating wire heater connected in series with the heating wire heater, A heating circuit portion including a heater power controller for causing a heater current corresponding to the power source to flow;
Detecting the positive and negative zero-crossing positions and peak positions of the AC synchronous signal, controlling the heating circuit section from the positive zero-crossing position detection to control the heating current to flow through the heating wire heater, detecting a negative zero-crossing position A microcomputer for measuring a temperature by the NTC thermistor when a peak position is detected and controlling the heater power controller by comparing the measured temperature with a predetermined temperature; And
A heater power controller on signal which is connected between the microcomputer and the heater power controller and is outputted from the microcomputer to the heater power controller, passes the heater power controller on signal, and controls the heater power controller on signal Further comprising a fire cutoff unit for shutting off the direct current voltage and outputting a heater power controller off signal to the heater power controller when a DC voltage generated by continuous input of the AC power is input, Controlled thermostatic bed temperature control device.
The method according to claim 1,
The heating wire heater,
Further comprising a diode having an anode connected to the other end of the first heating line receiving a heating signal from the AC power source and a cathode connected to one end of the second heating line,
Wherein one end of the first heating line is connected to the AC power cut-off unit and the other end of the second heating line is connected to the heater power controller and the temperature measuring unit. Bedclothes temperature control.
3. The method of claim 2,
A first resistor receiving a direct current power at one end,
A second resistor connected at one end to the other end of the first resistor and the micom,
A third resistor having one end connected to the other end of the second resistor and the other end connected to a second heating line of the heating wire heater,
A fourth resistor connected to one end of the third resistor and grounded at the other end;
A temperature detection line disconnection detecting unit having one end connected to both terminals of the AC power source and the other end connected to one end of the second heating line to transmit a temperature signal during disconnection of the NTC thermistor which is the temperature detection line of the heating line heater; And
Further comprising a display unit for displaying information and providing information to a user,
The heating wire heater,
One end of the first heating line is connected to both terminals of the AC power source and the other end is connected to the heater power controller, one end of the second heating line is connected to both terminals of the AC power source, And is connected to the other end,
The microcomputer,
Detecting a temperature detection signal input through the second resistor in a temperature detection operation period to determine whether the temperature detection signal is a temperature detection line disconnection signal by the temperature detection line disconnection detection unit, And the temperature detection line is notified that the temperature detection line is disconnected by displaying the disconnection line of the line through the display unit. The AC synchronous control type electrothermal bed liniment temperature regulator having the fire prevention function due to the failure of the microcomputer.
The method according to claim 1,
A first resistor receiving a direct current power at one end,
A second resistor connected at one end to the other end of the first resistor and the micom,
A third resistor having one end connected to the other end of the second resistor and the other end connected to a second heating line of the heating wire heater,
And a fourth resistor connected to one end of the third resistor and grounded at the other end,
The heating wire heater,
One end of the first heating line is connected to both terminals of the AC power source and the other end is connected to the heater power controller,
Wherein one end of the second heating line is connected to the other end of the third resistance of the temperature measuring unit, and the temperature control unit is connected to the other end of the third resistance of the temperature measuring unit.
An AC synchronous detector for outputting an AC synchronous signal corresponding to an AC power inputted in a sinusoidal waveform;
An AC power cut-off unit connected in series with an AC power source for supplying AC power and supplying or cutting off the input AC power by being turned on or off under control;
A heating wire heater including a first heating wire, a second heating wire, and a synthetic resin insulating layer formed between the first heating wire and the second heating wire; and a heating wire heater connected in series with the heating wire heater, A heating circuit portion including a heater power controller for causing a heater current corresponding to the AC power to flow;
A microcomputer for detecting positive and negative zero-crossing positions and peak positions of the AC synchronous signal and controlling a heating circuit unit from a positive zero crossing position to control a heating current to flow through a heating wire heater; And
A heater power controller on signal which is connected between the microcomputer and the heater power controller and is outputted from the microcomputer to the heater power controller, passes the heater power controller on signal, cuts off the DC voltage when the DC voltage is inputted, And a fire cutoff unit for outputting a heater power controller off signal to the heater power controller.
KR1020160021434A 2016-02-23 2016-02-23 AC control-typed temperature controlling apparatus and method for preventing a fire caused by the fixing of the microcomputer KR101673840B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005123977A (en) 2003-10-17 2005-05-12 Sharp Corp Zero-cross point detection apparatus and heater controller using the same
KR200445400Y1 (en) 2009-04-21 2009-07-27 유한성 Driving device of magnetic field heating wire for bedding

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008018654A1 (en) 2006-08-08 2008-02-14 Jong-Jin Kil Magnetic field-free temperature controller and temperature control method using dual timing signals
KR100926227B1 (en) * 2009-03-30 2009-11-09 길종진 Apparatus for preventing fire in temperature controller
KR101560123B1 (en) * 2015-04-22 2015-10-26 길종진 Apparatus and method for controlling temperature of heating bedding in accordance with AC synchronous signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005123977A (en) 2003-10-17 2005-05-12 Sharp Corp Zero-cross point detection apparatus and heater controller using the same
KR200445400Y1 (en) 2009-04-21 2009-07-27 유한성 Driving device of magnetic field heating wire for bedding

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