CN106028479A - Micro-computer automatic temperature control electric frying pan - Google Patents
Micro-computer automatic temperature control electric frying pan Download PDFInfo
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- CN106028479A CN106028479A CN201610660253.0A CN201610660253A CN106028479A CN 106028479 A CN106028479 A CN 106028479A CN 201610660253 A CN201610660253 A CN 201610660253A CN 106028479 A CN106028479 A CN 106028479A
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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
- H05B3/00—Ohmic-resistance heating
- H05B3/0019—Circuit arrangements
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- 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
- A47J27/00—Cooking-vessels
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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
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Electric Stoves And Ranges (AREA)
Abstract
The invention provides a micro-computer automatic temperature control electric frying pan. The bottom face of a pan body is provided with electrical heating tubes in an embedded mode or in a die-casting mode, the bottom of the pan body is provided with a base used for supporting the pan body, a heat insulation layer is arranged at the joint of the bottom of the pan body and the base, a power distribution box is arranged on one side of the base, a control circuit board is arranged in the power distribution box, and the bottom face of the pan body is further provided with a thermocouple which is installed at the center of the bottom face of the pan body in a closely attached mode. According to the micro-computer automatic temperature control electric frying pan, the temperature of the bottom of the electric frying pan is automatically detected by the thermocouple and controlled by the thermocouple and a micro-computer processor in a cooperative mode, the temperature is set through a function selecting switch, and when the temperature approaches a set value, the micro-computer processor starts controlling in advance to control the power output of controlled silicon, and then precise, stepless and automatic temperature control is achieved; in addition, controlled silicon has no mechanical contact, and the thermocouple resists high temperature and is not prone to damage. The electric frying pan further has a timed shutdown function, and therefore bad consequences are prevented. Accordingly, the micro-computer automatic temperature control electric frying pan is good in whole controllability, easy to operate and very worthy of popularization.
Description
Technical field
The present invention relates to a kind of electric frying pan, specifically a kind of temperature automatically controlled electric frying pan of micro computer, belong to household electrical appliance technical field.
Background technology
The electric frying pan sold on the market at present typically uses stepping to carry out power adjustments, and then controls the temperature of electric frying pan.Gear owing to setting is limited, and output on set position is constant, the temperature of electric frying pan can not be realized accuracy controlling, and existing electric frying pan generally uses Kick type mechanical temperature-control device when preventing overtemperature from providing protection, reason based on material, it is high temperature resistant is usually no more than 300 DEG C, range is restricted, furthermore in actual applications, owing to mechanical temperature-control is reaching temperature just kick stopping heating, and electrothermal tube heat transfer has hysteresis quality, after switch cutoff, temperature also may proceed to raise certain time, plus rising again error, mechanical temperature-control is extremely difficult to accurately for the control of temperature, when therefore using this type of electric frying pan cooking, on temperature control node be not often the too quickly easy parching to brown of the duration and degree of heating be exactly that duration and degree of heating deficiency is the most half-cooked, it is very difficult handy to control.The contact switch that additionally mechanical temperature control uses in use is easy to because contact arching oxidation causes loose contact phenomenon to damage.Need badly the most on the market and a can realize the stepless temperature automatically controlled and the most non-damageable electric frying pan of temperature control element.
Summary of the invention
It is an object of the invention to provide a kind of temperature automatically controlled electric frying pan of micro computer, the problem that stepless temperature automatically controlled and temperature control element is easily damaged can not be realized solving existing electric frying pan.
The concrete technical scheme that the present invention is taked is as follows:
A kind of temperature automatically controlled electric frying pan of micro computer, mainly it is made up of pot, base and block terminal three parts, wherein pot bottom surface setting-in or die casting have electrothermal tube, the bottom of pot is provided with the base for supporting, bottom of pot body has thermal insulation layer with the junction of base, block terminal is arranged on the side of base, is provided with control circuit plate in block terminal, and described pot bottom surface is additionally provided with thermocouple and fits tightly and be arranged on pot bottom center；Described control circuit plate is provided with micro processor, charactron, functional select switch, operational amplifier, triode, optocoupler and controllable silicon, wherein the temperature detection signal of thermocouple is followed by the input into micro processor through operational amplifier amplification, charactron and functional select switch connect the corresponding port of micro processor, the outfan of micro processor connects the input of triode and is controlled the on off state of triode, the outfan of triode connects the input of optocoupler, the outfan of optocoupler connects silicon controlled and controls end, the series connection of silicon controlled main electrical scheme end accesses in the supply line of electrothermal tube；Described micro processor uses STM8S103 single-chip microcomputer, and described thermocouple uses the K-type thermocouple of positive temperature coefficient.
The temperature automatically controlled electric frying pan of this micro computer utilizes thermocouple automatically to detect the temperature at the bottom of electric food warmer, and coordinate micro processor to be controlled, by functional select switch, temperature is set, when temperature is close to during close to setting value, micro processor starts to control in advance, micro processor controls the output of silicon controlled power by controlling the duty cycle of switching of output pulse signal, thus realizes accurate stepless temperature automatically controlled.Owing to using controllable silicon to replace the switch with mechanical contact of prior art, can thoroughly solve the loose contact phenomenon that switch with mechanical contact causes because of contact arching oxidation, and thermocouple is high temperature resistant, is hardly damaged.Therefore this micro computer temperature automatically controlled electric frying pan global controllability is good, it is easy to operation, highly promotes.
Accompanying drawing explanation
Fig. 1 is the contour structures schematic diagram of the temperature automatically controlled electric frying pan of this micro computer.
Fig. 2 is the circuit diagram (when using a bidirectional triode thyristor) of control circuit plate.
Fig. 3 is the circuit diagram (when using two one-way SCRs) of control circuit plate.
In Fig. 1: 1-pot, 2-thermal insulation layer, 3-base, 4-block terminal.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the temperature automatically controlled electric frying pan of this micro computer is mainly made up of pot 1, base 3 and block terminal 4 three parts, wherein pot 1 bottom surface setting-in or die casting have electrothermal tube, the bottom of pot 1 is provided with the base 3 for supporting, bottom pot 1, there is thermal insulation layer 2 junction with base 3, block terminal 4 is arranged on the side of base 3, is provided with control circuit plate in block terminal 4, and described pot 1 bottom surface is additionally provided with thermocouple and fits tightly and be arranged on pot 1 bottom center.
Described control circuit plate is provided with micro processor, charactron, functional select switch, operational amplifier, triode, optocoupler and controllable silicon, wherein the temperature detection signal of thermocouple is followed by the input into micro processor through operational amplifier amplification, charactron and functional select switch connect the corresponding port of micro processor, the outfan of micro processor connects the input of triode and is controlled the on off state of triode, the outfan of triode connects the input of optocoupler, the outfan of optocoupler connects silicon controlled and controls end, the series connection of silicon controlled main electrical scheme end accesses in the supply line of electrothermal tube.Described micro processor uses STM8S103 single-chip microcomputer, and described thermocouple uses the K-type thermocouple of positive temperature coefficient.
The physical circuit of described control circuit plate is as shown in Figure 2, the civil power of 220V introduces through 1 foot and 2 feet of socket J, 1 foot of socket J connects one end of 9V primary, 2 foot concatenation protective tube F are followed by the other end of 9V primary, successively through 9V transformator transformation, bridge heap rectification, electric capacity C2 filters, three terminal regulator L7805 voltage stabilizing, after electric capacity C1 filtering, the DC source VCC forming+5V is other power elements of circuit.
The positive pole of thermocouple and negative pole are respectively connecting to 1 foot and 2 feet of socket J1,1 foot of socket J1 and 2 feet are respectively connecting to 3 feet and 2 feet of LM358 operational amplifier again, 8 feet of operational amplifier connect VCC power supply, 4 foot ground connection, and 1 foot outfan accesses 19 feet of STM8S103 single-chip microcomputer.
9 feet of single-chip microcomputer connect VCC power supply, 7 foot ground connection, connecting the base stage of triode Q1, the grounded emitter of triode Q1 after 5 foot outfan series resistor R8, colelctor electrode connects 2 feet of MOC3063 optocoupler, 1 foot of optocoupler connects VCC power supply, connecting 1 foot of socket J after 6 foot series resistor R12 of optocoupler, 4 feet of optocoupler connect 1 foot of the terminals T1 connection socket J of the control pole G, bidirectional triode thyristor Q2 of bidirectional triode thyristor Q2, terminals T2 connects 2 feet of electrothermal tube, and 1 foot of electrothermal tube is through 2 feet of protective tube F combination hub J；Also being parallel with anti-clutter circuit between terminals T1 and T2 of bidirectional triode thyristor Q2, anti-clutter circuit is composed in series by resistance R13 and electric capacity C3.
Charactron F uses three Digital sum pipes, 2 feet of single-chip microcomputer, 3 feet and the common cathode of 16 foot control charactron F or common-anode, connect charactron F after 1 foot of single-chip microcomputer, 6 feet, 13 feet, 14 feet, 15 feet, 17 feet, 20 feet series resistor R1, R2, R3, R4, R5, R6, R7 respectively；Functional select switch includes one end ground connection of button K1 and K2, button K1 and K2, connects 11 feet and 12 feet of single-chip microcomputer after other end series resistor R9 and R10 respectively the most respectively.
Described circuit board is additionally provided with red LED and green LED and indicates respectively as the instruction of height warm area heating signal and power supply；One end of VCC power supply connecting resistance R14, the positive pole of another red LED D2 of termination of resistance R14, the negative pole of red LED D2 connects 10 feet of single-chip microcomputer；VCC power supply connects the positive pole of green LED D1, one end of the negative pole connecting resistance R11 of green LED D1, the other end ground connection of resistance R11.
Being additionally provided with the communications connector J2 of 4 feet on described circuit board for single-chip microcomputer transmission procedure, 1 foot of communications connector J2 connects VCC power supply, 4 foot ground connection, and 2 feet and 3 feet connect 18 feet and 4 feet of single-chip microcomputer respectively.
When this electric frying pan uses, power line being inserted socket J, power supply turns on, and green LED is lighted, and charactron F shows OFF, shows that power supply has been turned on and be in holding state, and electric frying pan does not heats.During electric frying pan to be turned on and off, the shortest click button one of K1, K2.On charactron F can display switch state directly perceived, OFF is the state closed, the state being out when there being numerical value to show.The setting of temperature divides range set and the range set of high-temperature region (200～350 DEG C) of low-temperature space (50～199 DEG C), button K1 is that low-temperature space arranges key, button K2 is that high-temperature region arranges key, make operation effective short the double-clicking of button in the state opened, press 3 seconds by bond distance same again, the temperature value of now charactron F display flicker, now regulating key K1, K2 can realize temperature plus-minus setting.When needing heating, the shortest button one of K1, the K2 of clicking, charactron F show actual temp numerical value, and electric frying pan adds heat pipes heat, and red LED is lighted, electrothermal tube current flowing, and temperature value constantly rises.At this moment the program run is the last temperature value set.The temperature value set has memory function, does not have a power failure because of midway or suspends and change.According to the program setting of single-chip microcomputer, when temperature is set in low-temperature space, add the normal bright instruction of red LED when heat pipe heats, when temperature is set in high-temperature region, add red LED flicker instruction when heat pipe heats.This electric frying pan utilizes thermocouple detection temperature at the bottom of electric food warmer, and detection temperature is transmitted to single-chip microcomputer after operational amplifier amplifies.When temperature normally rises, 5 foot output high level of single-chip microcomputer, audion Q1 turns on, and optocoupler internal illumination makes bidirectional triode thyristor Q2 turn on, and electrothermal tube full power is generated heat.When temperature rises to close to setting value, the program of single-chip microcomputer is started to control, the output pulse of single-chip microcomputer 5 foot progressively reduces duty cycle of switching, bidirectional triode thyristor Q2 is made to reduce output, duty cycle of switching closer to the output pulse of design temperature single-chip microcomputer 5 foot is the least, and the output of bidirectional triode thyristor Q2 is the least.After the temperature risen reaches setting value, 5 foot output low levels of single-chip microcomputer, make bidirectional triode thyristor Q2 end, electrothermal tube disconnects, and electric frying pan is in keeping warm mode.When temperature cooling declines, then the control mode of single-chip microcomputer is contrary, and when temperature declines less, the switch duty of 5 foot output pulses of single-chip microcomputer is less, and when temperature declines bigger, 5 foot outputs of single-chip microcomputer will keep high level, make bidirectional triode thyristor fully on.This electric frying pan is provided with timing shutdown function also by Single Chip Microcomputer (SCM) program, recognizes the 1 hour automatic shutdown in high-temperature region.2 hours automatic shutdowns of low-temperature space, produce the contingent adverse consequences of high temperature due to long-time during to prevent from forgetting shutdown, and after shutdown, start timing restarts timing again.Low-temperature space is mainly used in the culinary art such as fried fish, does not worries burnt it can also be used to be incubated to food, thus set to be automatically switched off the time longer.
It addition, as it is shown on figure 3, the bidirectional triode thyristor Q2 used in described control circuit plate can also substitute with two one-way SCRs T1, T2, be consequently formed another kind of circuit arrangement.Method particularly includes: the bidirectional triode thyristor Q2 in foregoing circuit and resistance R12, R13 and the element of electric capacity C3 and connection line are cancelled, substitute with one-way SCR T1, T2 and resistance R15, R16, R17 and diode D3, D4, wherein 6 feet of MOC3063 optocoupler connect one end of resistance R15, the negative pole of diode D3 and the control pole of one-way SCR T1, the negative electrode of the other end of resistance R15, the positive pole of diode D3 and one-way SCR T1 connects 1 foot of socket J1, and the anode of one-way SCR T1 connects 2 feet of electrothermal tube；One end of resistance R16, the negative pole of diode D4 and the control pole of one-way SCR T2 is connected after 4 foot series resistor R17 of MOC3063 optocoupler, the negative electrode of the other end of resistance R16, the positive pole of diode D4 and one-way SCR T2 connects 2 feet of electrothermal tube, and the anode of one-way SCR T2 connects 1 foot of socket J1.
The controllable silicon of this electric frying pan is furnished with radiator, and radiator can be arranged on the bottom of block terminal, doubles as the bottom of block terminal, dual-use material while as radiator.When using two one-way SCRs, it is also possible to the radiator of two one-way SCRs is separately positioned on the both sides of block terminal, it should be noted that the connection between radiator and the controllable silicon that can regard switch as must be insulation.
Claims (8)
1. the temperature automatically controlled electric frying pan of micro computer, it is characterized in that: described electric frying pan is mainly made up of pot, base and block terminal three parts, wherein pot bottom surface setting-in or die casting have electrothermal tube, the bottom of pot is provided with the base for supporting, bottom of pot body has thermal insulation layer with the junction of base, block terminal is arranged on the side of base, is provided with control circuit plate in block terminal, and described pot bottom surface is additionally provided with thermocouple and fits tightly and be arranged on pot bottom center；Described control circuit plate is provided with micro processor, charactron, functional select switch, operational amplifier, triode, optocoupler and controllable silicon, wherein the temperature detection signal of thermocouple is followed by the input into micro processor through operational amplifier amplification, charactron and functional select switch connect the corresponding port of micro processor, the outfan of micro processor connects the input of triode and is controlled the on off state of triode, the outfan of triode connects the input of optocoupler, the outfan of optocoupler connects silicon controlled and controls end, the series connection of silicon controlled main electrical scheme end accesses in the supply line of electrothermal tube；Described micro processor uses STM8S103 single-chip microcomputer, and described thermocouple uses the K-type thermocouple of positive temperature coefficient.
Electric frying pan the most according to claim 1, it is characterized in that: the physical circuit of described control circuit plate is: the civil power of 220V introduces through 1 foot and 2 feet of socket J, 1 foot of socket J connects one end of 9V primary, 2 foot concatenation protective tube F are followed by the other end of 9V primary, successively through 9V transformator transformation, bridge heap rectification, electric capacity C2 filters, three terminal regulator L7805 voltage stabilizing, after electric capacity C1 filtering, the DC source VCC forming+5V is other power elements of circuit；
The positive pole of thermocouple and negative pole are respectively connecting to 1 foot and 2 feet of socket J1,1 foot of socket J1 and 2 feet are respectively connecting to 3 feet and 2 feet of LM358 operational amplifier again, 8 feet of operational amplifier connect VCC power supply, 4 foot ground connection, and 1 foot outfan accesses 19 feet of STM8S103 single-chip microcomputer；
9 feet of single-chip microcomputer connect VCC power supply, 7 foot ground connection, connecting the base stage of triode Q1, the grounded emitter of triode Q1 after 5 foot outfan series resistor R8, colelctor electrode connects 2 feet of MOC3063 optocoupler, 1 foot of optocoupler connects VCC power supply, connecting 1 foot of socket J after 6 foot series resistor R12 of optocoupler, 4 feet of optocoupler connect 1 foot of the terminals T1 connection socket J of the control pole G, bidirectional triode thyristor Q2 of bidirectional triode thyristor Q2, terminals T2 connects 2 feet of electrothermal tube, and 1 foot of electrothermal tube is through 2 feet of protective tube F combination hub J；Also being parallel with anti-clutter circuit between terminals T1 and T2 of bidirectional triode thyristor Q2, anti-clutter circuit is composed in series by resistance R13 and electric capacity C3；
Charactron F uses three Digital sum pipes, 2 feet of single-chip microcomputer, 3 feet and the common cathode of 16 foot control charactron F or common-anode, connect charactron F after 1 foot of single-chip microcomputer, 6 feet, 13 feet, 14 feet, 15 feet, 17 feet, 20 feet series resistor R1, R2, R3, R4, R5, R6, R7 respectively；Functional select switch includes one end ground connection of button K1 and K2, button K1 and K2, connects 11 feet and 12 feet of single-chip microcomputer after other end series resistor R9 and R10 respectively the most respectively.
Electric frying pan the most according to claim 2, is characterized in that: described circuit board is additionally provided with red LED and green LED and indicates respectively as the instruction of height warm area heating signal and power supply；One end of VCC power supply connecting resistance R14, the positive pole of another red LED D2 of termination of resistance R14, the negative pole of red LED D2 connects 10 feet of single-chip microcomputer；VCC power supply connects the positive pole of green LED D1, one end of the negative pole connecting resistance R11 of green LED D1, the other end ground connection of resistance R11.
Electric frying pan the most according to claim 2, it is characterized in that: be additionally provided with the communications connector J2 of 4 feet on described circuit board for single-chip microcomputer transmission procedure, 1 foot of communications connector J2 connects VCC power supply, 4 foot ground connection, and 2 feet and 3 feet connect 18 feet and 4 feet of single-chip microcomputer respectively.
Electric frying pan the most according to claim 1, it is characterized in that: the physical circuit of described control circuit plate is: the civil power of 220V introduces through 1 foot and 2 feet of socket J, 1 foot of socket J connects one end of 9V primary, 2 foot concatenation protective tube F are followed by the other end of 9V primary, successively through 9V transformator transformation, bridge heap rectification, electric capacity C2 filters, three terminal regulator L7805 voltage stabilizing, after electric capacity C1 filtering, the DC source VCC forming+5V is other power elements of circuit；
The positive pole of thermocouple and negative pole are respectively connecting to 1 foot and 2 feet of socket J1,1 foot of socket J1 and 2 feet are respectively connecting to 3 feet and 2 feet of LM358 operational amplifier again, 8 feet of operational amplifier connect VCC power supply, 4 foot ground connection, and 1 foot outfan accesses 19 feet of STM8S103 single-chip microcomputer；
9 feet of single-chip microcomputer connect VCC power supply, 7 foot ground connection, the base stage of triode Q1 is connected after 5 foot outfan series resistor R8, the grounded emitter of triode Q1, colelctor electrode connects 2 feet of MOC3063 optocoupler, and 1 foot of optocoupler connects VCC power supply, and 6 feet of optocoupler connect one end of resistance R15, the negative pole of diode D3 and the control pole of one-way SCR T1, the negative electrode of the other end of resistance R15, the positive pole of diode D3 and one-way SCR T1 connects 1 foot of socket J1, and the anode of one-way SCR T1 connects 2 feet of electrothermal tube；One end of resistance R16, the negative pole of diode D4 and the control pole of one-way SCR T2 is connected after 4 foot series resistor R17 of MOC3063 optocoupler, the negative electrode of the other end of resistance R16, the positive pole of diode D4 and one-way SCR T2 connects 2 feet of electrothermal tube, and the anode of one-way SCR T2 connects 1 foot of socket J1；
Charactron F uses three Digital sum pipes, 2 feet of single-chip microcomputer, 3 feet and the common cathode of 16 foot control charactron F or common-anode, connect charactron F after 1 foot of single-chip microcomputer, 6 feet, 13 feet, 14 feet, 15 feet, 17 feet, 20 feet series resistor R1, R2, R3, R4, R5, R6, R7 respectively；Functional select switch includes one end ground connection of button K1 and K2, button K1 and K2, connects 11 feet and 12 feet of single-chip microcomputer after other end series resistor R9 and R10 respectively the most respectively.
Electric frying pan the most according to claim 1, is characterized in that: the controllable silicon of described electric frying pan is furnished with radiator, and radiator is arranged on the bottom of block terminal, doubles as the bottom of block terminal while as radiator.
Electric frying pan the most according to claim 1, is characterized in that: when described electric frying pan uses two one-way SCRs, the radiator of two one-way SCRs is separately positioned on the both sides of block terminal.
Electric frying pan the most according to claim 1, is characterized in that: described electric frying pan is provided with timing shutdown function by Single Chip Microcomputer (SCM) program.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610660253.0A CN106028479A (en) | 2016-08-12 | 2016-08-12 | Micro-computer automatic temperature control electric frying pan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610660253.0A CN106028479A (en) | 2016-08-12 | 2016-08-12 | Micro-computer automatic temperature control electric frying pan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108668393A (en) * | 2017-03-29 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its heating control apparatus and method |
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| CN2640369Y (en) * | 2003-08-05 | 2004-09-15 | 周衍增 | Electric frying pan with intelligent controlled speech indication |
| CN102166091A (en) * | 2011-01-01 | 2011-08-31 | 钟军 | Multifunctional thermoregulation electric fryer |
| CN205883605U (en) * | 2016-08-12 | 2017-01-11 | 陈安森 | Microcomputer automatic temperature control electric frying pan |
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2016
- 2016-08-12 CN CN201610660253.0A patent/CN106028479A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2562702Y (en) * | 2001-11-18 | 2003-07-30 | 周衍增 | Micro computer sealed integrated electric pan |
| CN2640369Y (en) * | 2003-08-05 | 2004-09-15 | 周衍增 | Electric frying pan with intelligent controlled speech indication |
| CN102166091A (en) * | 2011-01-01 | 2011-08-31 | 钟军 | Multifunctional thermoregulation electric fryer |
| CN205883605U (en) * | 2016-08-12 | 2017-01-11 | 陈安森 | Microcomputer automatic temperature control electric frying pan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108668393A (en) * | 2017-03-29 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its heating control apparatus and method |
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Application publication date: 20161012 |