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WO2006118417A1 - Circuit de commande pour faire fonctionner un radiateur d'appareils electromenagers - Google Patents

Circuit de commande pour faire fonctionner un radiateur d'appareils electromenagers Download PDF

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Publication number
WO2006118417A1
WO2006118417A1 PCT/KR2006/001653 KR2006001653W WO2006118417A1 WO 2006118417 A1 WO2006118417 A1 WO 2006118417A1 KR 2006001653 W KR2006001653 W KR 2006001653W WO 2006118417 A1 WO2006118417 A1 WO 2006118417A1
Authority
WO
WIPO (PCT)
Prior art keywords
heater
home appliances
electric home
driving circuit
resistor
Prior art date
Application number
PCT/KR2006/001653
Other languages
English (en)
Inventor
Chang Min Choi
Yeong Seop Choe
Won Jae Choi
Jae Won Lee
Baik Young Chung
Se Dong Chang
Original Assignee
Lg Electronics Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Electronics Inc. filed Critical Lg Electronics Inc.
Publication of WO2006118417A1 publication Critical patent/WO2006118417A1/fr

Links

Classifications

    • 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
    • H05B1/0275—Heating of spaces, e.g. rooms, wardrobes
    • H05B1/028—Airconditioning
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00—Baking; Roasting; Grilling; Frying
    • A47J37/06—Roasters; Grills; Sandwich grills
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/24—Warming devices
    • A47J36/2477—Warming devices using solid fuel, e.g. with candles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/24—Warming devices
    • A47J36/26—Devices for warming vessels containing drinks or food, especially by means of burners Warming devices with a burner, e.g. using gasoline; Travelling cookers, e.g. using petroleum or gasoline with one burner

Definitions

  • the present invention relates to a heater-driving circuit of electric home appliances, and more particularly, to a heater-driving circuit of electric home appliances equipped with a circuit including an operational amplifier.
  • electric home appliances include various kinds of heater turned on or off according to temperature change.
  • an air conditioner as shown in FIG. 1, includes an outdoor unit 1 and an indoor unit 2, wherein respective heaters (not shown) are installed in the outdoor unit 1 and the indoor unit 2.
  • a heater installed in the outdoor unit 1 is used as a defrosting heater to remove frost on an outdoor heat-exchanger, and a heater installed in the indoor unit 2 is used to heat indoor air in a change of season or in a winter.
  • a conventional heater driving circuit of electric home appliances such as an air conditioner, as shown in FIG. 2, includes a temperature detector 3 for detecting a change of indoor temperature or outdoor temperature and for outputting a voltage Vth changed according to the change of the temperatures, a microcomputer 4 for receiving the voltage Vth outputted from the temperature sensor 3 and for outputting a control signal to control a heater H, and a relay 5 for applying a driving voltage VAC of the heater H to the heater H or interrupting the same according to the control signal outputted from the microcomputer 4.
  • the microcomputer 4 generates outdoor temperature data by converting the voltage
  • Vth received from the temperature detector 3 into actual temperature and outputs a heater driving signal when a value of the outdoor temperature data is smaller than that of a reference temperature data by comparing the generated outdoor temperature data with the reference temperature data stored in the microcomputer 4.
  • a heater driving circuit of electric home appliances including a temperature detector for outputting a detecting voltage corresponding to at least one temperature change of an outdoor temperature and an indoor temperature, a heater driving controller including an operational amplifier for outputting a driving control signal for a heater that is installed in the electric home appliance according to the detecting voltage, and a relay for applying a driving power to the heater or interrupting the driving power according to the driving control signal.
  • the temperature detector includes a first resistor having an end connected to a primary voltage applied from the exterior, and a thermistor connected to another end of the first resistor and having resistance changed with a temperature change to output the detecting voltage from the primary voltage.
  • the heater driving controller includes a second resistor having an end connected to the primary voltage and a variable resistor connected to another end of the second resistor in serial.
  • the negative (-) input terminal of the operational amplifier is connected to a connecting point between the second resistor and the variable resistor.
  • the detecting voltage is inputted to a positive (+) input terminal of the operational amplifier, and a reference voltage divided from the primary voltage is inputted to a negative (-) input terminal of the operational amplifier, and the operational amplifier compares the reference voltage inputted to the negative (-) input terminal with the detecting voltage applied to the positive (+) input terminal to output the driving control signal.
  • the relay is turned on or off according to the driving control signal outputted from the operational amplifier. At this time, the relay applies a driving power to the heater when being turned on, and the relay interrupts a driving power applied to the heater when being turned off.
  • FIG. 1 shows an example of a conventional air conditioner
  • FIG. 2 is a block diagram illustrating a conventional heater driving circuit
  • FIG. 3 is a block diagram illustrating a heater driving circuit according to a preferred embodiment of the present invention.
  • FIG. 4 is a circuit diagram illustrating the heater driving circuit according to the preferred embodiment of the present invention.
  • FIG. 5 shows an example of the heater driving circuit according to the preferred embodiment of the present invention.
  • FIG. 6 shows another example of the heater driving circuit according to the preferred embodiment of the present invention. Best Mode for Carrying Out the Invention
  • FIG. 3 is a block diagram illustrating a heater driving circuit according to a preferred embodiment of the present invention
  • FIG. 4 is a circuit diagram illustrating the heater driving circuit according to the preferred embodiment of the present invention
  • FIGS. 5 and 6 show examples of the heater driving circuit according to the preferred embodiment of the present invention.
  • the heater driving circuit of electric home appliances according to the preferred embodiment of the present invention will be described as follows.
  • the heater driving circuit of electric home appliances includes a temperature detector 10 for outputting a detecting voltage corresponding to at least one temperature change of an outdoor temperature and an indoor temperature, a heater driving controller 20 including an operational amplifier 30 for outputting a driving signal for a heater that is installed in the electric home appliance according to the detecting voltage, and a relay 40 for applying a driving power to the heater or interrupting the driving power according to the driving signal.
  • FIG. 4 is a circuit diagram illustrating the heater driving circuit according to the preferred embodiment of the present invention.
  • the heater driving circuit of electric home appliances according to the preferred embodiment of the present invention will be described in detail with reference to FIG. 4.
  • the temperature detector 10 includes a primary voltage Vcc applied from the exterior, a first resistor Rl having an end connected to the primary voltage Vcc, and a thermistor T connected to another end of the first resistor Rl.
  • the thermistor T is a device whose resistance is changed with a temperature change and is grouped into a positive temperature coefficient thermistor (PTC) whose resistance increases as temperature increases and a negative temperature coefficient thermistor (NTC) whose resistance decreases as temperature increases.
  • PTC positive temperature coefficient thermistor
  • NTC negative temperature coefficient thermistor
  • the temperature detector 10 outputs a detecting voltage Vth from the primary voltage Vcc with respect to a temperature change of outdoor temperature or indoor temperature by the thermistor T whose resistance increases as the outdoor temperature or the indoor temperature increases.
  • the detecting voltage Vth is expressed by Math Figure 1.
  • Vcc is the primary voltage
  • Rth is a resistor of the thermistor T
  • Rl is a first resistor whose end is connected to the primary voltage Vcc and another end is connected to the resistor Rth
  • Vth is a detecting voltage Vth divided from the primary voltage Vcc by the resistor Rth of the thermistor and the first resistor Rl and is inputted to the operational amplifier 30 of the heater driving controller 20.
  • the heater driving controller 20 includes a second resistor R2 having an end connected to the end of the first resistor Rl, a variable resistor R3 connected to another end of the second resistor R2 in serial to output a reference voltage VR divided from the primary voltage Vcc when the resistance is changed by a setting condition, and the operational amplifier 30 connected to connecting points of the second resistor R2 and the variable resistor R3 to output the driving control signal.
  • a positive (+) input terminal of the operational amplifier 30 is connected to any one point between the first resistor Rl and the thermistor T such that the detecting voltage Vth divided by the first resistor Rl and the thermistor T is inputted, and the reference voltage VR divided from the primary voltage Vcc is inputted to a negative (-) input terminal of the operational amplifier 30.
  • variable resistor R3 is set such that resistance thereof varies according to a predetermined temperature.
  • the reference voltage VR that is divided by the second resistor R2 and the variable resistor R3 and inputted to the negative (-) input terminal of the operational amplifier 30 is expressed by the following Math Figure 2. [31] Math Figure 2
  • Vcc is the primary voltage
  • R2 is the second resistor
  • R3 is the variable resistor
  • VR is the reference voltage inputted to the negative (-) input terminal of the operational amplifier 30.
  • the operational amplifier 30 of the heater driving controller 20 receives the detecting voltage Vth divided from the primary voltage Vcc by the first resistor Rl and the resistor of the thermistor T through the positive (+) input terminal and the reference voltage VR divided from the primary voltage Vcc by the second resistor R2 and the variable R3 through the negative (-) input terminal and outputs the driving control signal by comparing the input voltage Vth with the reference voltage VR.
  • the operational amplifier 3 outputs a first driving control voltage through an output terminal thereof when the detecting voltage Vth is less than the reference voltage VR, and outputs a second driving control voltage through the output terminal when the detecting voltage Vth is greater than the reference voltage VR.
  • the polarity of the first driving control voltage is positive (+) and the polarity of the second control voltage is negative in the preferred embodiment of the present invention.
  • the operational amplifier 30 outputs the first driving voltage +Vee through the output terminal when the measured temperature by the temperature detector 10 is less than a predetermined reference temperature (detecting voltage Vth > reference voltage VR), and outputs the second driving voltage Vee through the output terminal when the measured temperature by the temperature detector 10 is greater than the predetermined reference temperature (detecting voltage Vth ⁇ reference voltage VR).
  • the relay 40 controls ON/OFF according to the driving control signal outputted from the operational amplifier 30 such that the driving power VAC is applied to the heater H or the driving power VAC applied to the heater H is interrupted.
  • the relay 40 is switched on when the driving control signal outputted from the operational amplifier 30 is the first driving control voltage +Vee such that the power VAC is applied to the heater H.
  • the heater H is operated by the applied power VAC.
  • the relay 40 is switched off when the driving control signal outputted from the operational amplifier 30 is the second driving control voltage -Vee such that the power VAC applied to the heater H is interrupted.
  • the heater H is stopped by the interruption of the power VAC.
  • FIG. 5 shows an example of the heater driving circuit according to the preferred embodiment of the present invention as a table illustrating operation state of the heater driving circuit when the resistor Rth of the thermistor T varies according to the temperature change of any one of the outdoor temperature and the indoor temperature.
  • the first resistor Rl is IK
  • the second resistor R2 is IK
  • the reference voltage VR becomes 75 by the Math Figure 2.
  • a voltage (driving control voltage) outputted from the operational amplifier 30 and operations of the relay 40 and the heater H when the resistor Rth of the thermistor T varies to IK, 2K, 3K, an 4K will be described as follows.
  • the detecting voltages Vth applied to the positive (+) input terminal of the operational amplifier 30 are respectively 50.0 and 66.7 by the Math Figure 1. Since the inputted voltages are less than 75 of the reference voltage VR applied to the negative (-) input terminal, the first driving control voltage +Vee is outputted from the operational amplifier 30. At this time, the relay 40 is switched on by the first driving control voltage +Vee and the power VAC is supplied and the heater H is turned on by the supplied power VAC.
  • Vth applied to the positive (+) input terminal of the operational amplifier 30 is 80.0 by the Math Figure 1. Since the applied detecting voltage is greater than 75 of the reference voltage VR applied to the negative (-) input terminal, the second driving control voltage -Vee is outputted from the operational amplifier 30. At this time, the relay 40 is switched off by the second driving control voltage -Vee and the power VAC is interrupted, and thus the heater H is stopped.
  • FIG. 6 shows another example of the heater driving circuit according to the preferred embodiment of the present invention, and shows a polarity of a voltage outputted from the operational amplifier 30 when the resistor Rth of the thermistor T varies according to temperature.
  • PTC increases as temperature increases.
  • the reference temperature is set to 0 degrees, on a basis of a resistance X at a point where the detected temperature is o degrees, +Vee is outputted with respect to the resistance less than X to operate the heater H, and Vee is outputted with respect to the resistance greater than X to stop the heater H.
  • the heater driving circuit in which the thermistor T is the negative temperature coefficient thermistor (NTC) may be operated vice versa.
  • the expensive microcomputer that is provided in the heater driving circuit of electric home appliances is eliminated, and a heater driving circuit using a cheap component such as an operational amplifier instead of the microcomputer is used so that costs for manufacturing can be saved.
  • a heater driving circuit using a cheap component such as an operational amplifier instead of the microcomputer is used so that costs for manufacturing can be saved.
  • an analog circuit including a resistor and an operational amplifier the configuration is simple so that time required to design and manufacture the products can be reduced.
  • the expensive microcomputer that is provided in the heater driving circuit of electric home appliances is eliminated, and a heater driving circuit using a cheap component such as an operational amplifier instead of the microcomputer is used so that costs for manufacturing can be saved. Moreover, since the configuration is simple, time required to design and manufacture the products can be reduced.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Food Science & Technology (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

La présente invention concerne un circuit de pilotage de radiateur d'appareils électroménagers. Le circuit de pilotage du radiateur utilise un circuit analogique incluant un amplificateur opérationnel pour produire un signal de commande de pilotage pour un radiateur installé dans les équipements électroménagers par réception et comparaison de la tension produite en sortie par détection des variations de température extérieure et de température intérieure avec une tension de référence. Le circuit de pilotage du radiateur commande le radiateur en fonction de la variation de température sans microordinateur coûteux, le temps de développement d'un circuit peut être réduit, le circuit est simple, et les coûts sont remarquablement économisé en raison des composants bon marché.
PCT/KR2006/001653 2005-05-03 2006-05-02 Circuit de commande pour faire fonctionner un radiateur d'appareils electromenagers WO2006118417A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020050037151A KR20060114929A (ko) 2005-05-03 2005-05-03 가전기기의 히터구동회로
KR10-2005-0037151 2005-05-03

Publications (1)

Publication Number Publication Date
WO2006118417A1 true WO2006118417A1 (fr) 2006-11-09

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KR (1) KR20060114929A (fr)
WO (1) WO2006118417A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK179080B1 (en) * 2013-11-20 2017-10-16 Tranberg As Device for controlling a heat-regulating appliance and a method for using the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109638846A (zh) * 2019-01-22 2019-04-16 江苏艾和系统集成工程有限公司 电力负荷分配控制器
CN110440367B (zh) * 2019-08-16 2021-04-06 湖北文理学院 空调能量再利用系统
CN111237997B (zh) * 2020-01-19 2021-04-20 广东美的制冷设备有限公司 空调器及其控制方法和控制装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970028702U (ko) * 1995-12-08 1997-07-24 히터 자동 제어장치
KR19990019470U (ko) * 1997-11-19 1999-06-15 전주범 전기 보온 밥솥의 보온 온도 제어 장치
KR19990069972A (ko) * 1998-02-16 1999-09-06 한연섭 온도센서가필요없는전열기기용온도조절장치
JP2000018991A (ja) * 1998-07-02 2000-01-21 Yazaki Corp 流量計測装置のヒータ駆動回路

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970028702U (ko) * 1995-12-08 1997-07-24 히터 자동 제어장치
KR19990019470U (ko) * 1997-11-19 1999-06-15 전주범 전기 보온 밥솥의 보온 온도 제어 장치
KR19990069972A (ko) * 1998-02-16 1999-09-06 한연섭 온도센서가필요없는전열기기용온도조절장치
JP2000018991A (ja) * 1998-07-02 2000-01-21 Yazaki Corp 流量計測装置のヒータ駆動回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK179080B1 (en) * 2013-11-20 2017-10-16 Tranberg As Device for controlling a heat-regulating appliance and a method for using the same

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