CN203504786U - Electromagnetic heating control circuit and electric pressure cooker - Google Patents

Electromagnetic heating control circuit and electric pressure cooker Download PDF

Info

Publication number
CN203504786U
CN203504786U CN201320571908.9U CN201320571908U CN203504786U CN 203504786 U CN203504786 U CN 203504786U CN 201320571908 U CN201320571908 U CN 201320571908U CN 203504786 U CN203504786 U CN 203504786U
Authority
CN
China
Prior art keywords
resistance
electromagnetic heating
diode
control chip
control circuit
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN201320571908.9U
Other languages
Chinese (zh)
Inventor
陈建化
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Guangdong Midea Consumer Electric Manufacturing Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Consumer Electric Manufacturing Co Ltd
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 Midea Group Co Ltd, Guangdong Midea Consumer Electric Manufacturing Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201320571908.9U priority Critical patent/CN203504786U/en
Application granted granted Critical
Publication of CN203504786U publication Critical patent/CN203504786U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses an electromagnetic heating circuit and an electric pressure cooker. The electromagnetic heating circuit includes control chip which is used for controlling the work of an electromagnetic heating module, a first diode, a second diode, a first resistor, and a second resistor, wherein an anode of the first diode is connected with a zero line of the commercial power, and a cathode of the first diode is connected with a cathode of the second diode; an anode of the second diode is connected with a live line of the commercial power, and a cathode of the second diode is connected with one terminal of the second resistor through the first resistor; the other terminal of the second resistor is connected with a grounding terminal of the control chip; a common connection terminal of the firs resistor and the second resistor is connected to a voltage detection terminal of the control chip, and the control chip controls work states of the electromagnetic heating module according to the voltage of the common connection terminal of the first resistor and the second resistor. With the electromagnetic heating control circuit, service life of an electromagnetic heating product is improved.

Description

Electromagnetic Heating control circuit and electric pressure cooker
Technical field
The utility model relates to electromagnetic heating technique field, particularly a kind of Anti-wind earphone and audio frequency broadcast system.
Background technology
As everyone knows, along with the development of electromagnetic heating technique, Electromagnetic Heating product is widely used.In prior art, in Electromagnetic Heating product, be provided with electromagnetic heating module and for controlling the control chip of electromagnetic heating module work, the power supply of this Electromagnetic Heating product comes from utility grid conventionally, but because commercial power network fluctuation is larger, when the voltage of utility grid is higher or lower, larger to the components and parts infringement in electromagnetic heating module, useful life of shadow Electromagnetic Heating product even.
Utility model content
Main purpose of the present utility model is to provide a kind of Electromagnetic Heating control circuit, the useful life of being intended to improve Electromagnetic Heating product.
To achieve these goals, the utility model provides a kind of Electromagnetic Heating control circuit, described Electromagnetic Heating control circuit comprises control chip, the first diode, the second diode, the first resistance and the second resistance for controlling electromagnetic heating module work, the anode of wherein said the first diode is connected with civil power zero line, and the negative electrode of the first diode is connected with the negative electrode of the second diode; The anode of described the second diode is connected with civil power live wire, and negative electrode is connected with one end of the second resistance by the first resistance; The other end of described the second resistance is connected with the earth terminal of described control chip; The public connecting end of described the first resistance and the second resistance is connected to the voltage detecting end of described control chip, and described control chip is controlled the operating state of described electromagnetic heating module according to the voltage swing of the public connecting end of described the first resistance and the second resistance.
Preferably, described Electromagnetic Heating control circuit also comprises the 3rd resistance and the 4th resistance, and one end of described the 3rd resistance is connected with the negative electrode of described the first diode, and the other end is connected with the earth terminal of described control chip by described the 4th resistance; The public connecting end of described the 3rd resistance and the 4th resistance is connected to the comparator positive input of described control chip; When the voltage of the public connecting end of described the 3rd resistance and the 4th resistance is greater than preset value, described control chip is controlled described electromagnetic heating module and is quit work.
Preferably, described Electromagnetic Heating control circuit also comprises coupling capacitance, and described coupling capacitance is parallel to the two ends of described the 3rd resistance.
The utility model provides a kind of electric pressure cooker, described electric pressure cooker comprises Electromagnetic Heating control circuit, described Electromagnetic Heating control circuit comprises control chip, the first diode, the second diode, the first resistance and the second resistance for controlling electromagnetic heating module work, the anode of wherein said the first diode is connected with civil power zero line, and the negative electrode of the first diode is connected with the negative electrode of the second diode; The anode of described the second diode is connected with civil power live wire, and negative electrode is connected with one end of the second resistance by the first resistance; The other end of described the second resistance is connected with the earth terminal of described control chip; The public connecting end of described the first resistance and the second resistance is connected to the voltage detecting end of described control chip, and described control chip is controlled the operating state of described electromagnetic heating module according to the voltage swing of the public connecting end of described the first resistance and the second resistance.
Preferably, described Electromagnetic Heating control circuit also comprises the 3rd resistance and the 4th resistance, and one end of described the 3rd resistance is connected with the negative electrode of described the first diode, and the other end is connected with the earth terminal of described control chip by described the 4th resistance; The public connecting end of described the 3rd resistance and the 4th resistance is connected to the comparator positive input of described control chip; When the voltage of the public connecting end of described the 3rd resistance and the 4th resistance is greater than preset value, described control chip is controlled described electromagnetic heating module and is quit work.
Preferably, described Electromagnetic Heating control circuit also comprises coupling capacitance, and described coupling capacitance is parallel to the two ends of described the 3rd resistance.
The utility model carries out exporting to after full-wave rectification the first resistance and the second resistance two ends of series connection by the first diode and the second diode pair utility grid voltage are set, the voltage that simultaneously detects the second resistance two ends by control chip obtains the virtual voltage of utility grid, and according to the Voltage-output control signal at the second resistance two ends, controls the operating state of electromagnetic heating module.Therefore effectively prevent that electromagnetic heating module from carrying out work in the situation that utility grid is too high or too low, thereby effectively protected the stability of each device work in electromagnetic heating module, extended the useful life of Electromagnetic Heating product.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the utility model Electromagnetic Heating control circuit one embodiment.
The realization of the utility model object, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of Electromagnetic Heating control circuit.
With reference to Fig. 1, Fig. 1 is the electrical block diagram of the utility model Electromagnetic Heating control circuit one embodiment.The Electromagnetic Heating control circuit that the present embodiment provides comprises for controlling control chip 10, the first diode D1, the second diode D2, the first resistance R 1 and second resistance R 2 of electromagnetic heating module work, the anode of wherein said the first diode D1 is connected with civil power zero line N, and the negative electrode of the first diode D1 is connected with the negative electrode of the second diode D2; The anode of described the second diode D2 is connected with civil power live wire L, and negative electrode is connected with one end of the second resistance R 2 by the first resistance R 1; The other end of described the second resistance R 2 is connected with the earth terminal of described control chip 10; The public connecting end of described the first resistance R 1 and the second resistance R 2 is connected to the voltage detecting end of described control chip 10, and described control chip 10 is controlled the operating state of described electromagnetic heating module according to the voltage swing of the public connecting end of described the first resistance R 1 and the second resistance R 2.
In the present embodiment, above-mentioned control chip 10 is for controlling Electromagnetic Heating special chip, and the AD that above-mentioned voltage detecting end is control chip 10 detects mouth, i.e. the 9th pin of control chip 10.
During work, utility grid by after the first diode D1 and the second diode D2 full-wave rectification by one end of Voltage-output to the first resistance R 1, and carry out dividing potential drop by the voltage after the first resistance R 1 and 2 pairs of rectifications of the second resistance R.Control chip 10 passes through to detect the magnitude of voltage at the second resistance R 2 two ends, and according to the magnitude of voltage analysis detecting, obtains the voltage swing of utility grid; When the utility grid of analysis acquisition exceeds preset range, output control signals to electromagnetic heating module, to control electromagnetic heating module, quit work.It should be noted that above-mentioned preset range can arrange according to actual needs, does not limit further at this.
The utility model carries out exporting to after full-wave rectification the first resistance R 1 and second resistance R 2 two ends of series connection by the first diode D1 and the second diode D2 are set to utility grid voltage, the voltage that simultaneously detects the second resistance R 2 two ends by control chip 10 obtains the virtual voltage of utility grid, and according to the Voltage-output control signal at the second resistance R 2 two ends, controls the operating state of electromagnetic heating module.Therefore effectively prevent that electromagnetic heating module from carrying out work in the situation that utility grid is too high or too low, thereby effectively protected the stability of each device work in electromagnetic heating module, extended the useful life of Electromagnetic Heating product.
Further, based on above-described embodiment, in the present embodiment, above-mentioned Electromagnetic Heating control circuit also comprises the 3rd resistance R 3 and the 4th resistance R 4, one end of described the 3rd resistance R 3 is connected with the negative electrode of described the first diode D1, and the other end is connected with the earth terminal of described control chip 10 by described the 4th resistance R 4; The public connecting end of described the 3rd resistance R 3 and the 4th resistance R 4 is connected to the comparator positive input of described control chip 10; When the voltage of the public connecting end of described the 3rd resistance R 3 and the 4th resistance R 4 is greater than preset value, described control chip 10 is controlled described electromagnetic heating module and is quit work.
In the present embodiment, in above-mentioned control chip 10, be provided with comparator, the forward output of this comparator is connected with the 1st pin of control chip 10, thus the comparator forward output of formation control chip 10; The inverse output terminal of this comparator connects one for reference voltage source relatively, for example can produce this reference voltage source by control chip 10 internal circuit configurations, the large I of this reference voltage source arranges according to actual needs, in the present embodiment, can adopt the voltage of 2.5V as reference voltage source.The resistance of above-mentioned the 3rd resistance R 3 and the 4th resistance R 4 can arrange according to actual needs, as long as guarantee that the voltage at the 4th resistance R 4 two ends under normal operation is less than the voltage of reference voltage source, when utility grid voltage or circuit produce disturbing pulse suddenly, the voltage at the 4th resistance R 4 two ends is greater than the voltage of reference voltage source.
For example, when normal work, the voltage at the 3rd resistance R 3 and the 4th resistance R 4 two ends is 1.1V, and now the positive input voltage of comparator is less than the voltage of reverse input end, and comparator is by output low level.When utility grid voltage or circuit produce disturbing pulse suddenly, the positive input voltage of comparator is less than the voltage of reverse input end, and comparator will be exported a rising edge triggering signal.Control chip 10 will trigger interrupt event according to this rising edge triggering signal, and export control signal and control electromagnetic heating module and quit work.Owing to responding accordingly by the voltage (surge voltage) raising suddenly in the 3rd resistance R 3 and 4 pairs of circuit of the 4th resistance R in the present embodiment, therefore can further prevent the impact of surge current on each device in electromagnetic heating module.
Further, based on above-described embodiment, in the present embodiment, above-mentioned Electromagnetic Heating control circuit also comprises coupling capacitance C1, and described coupling capacitance C1 is parallel to the two ends of described the 3rd resistance R 3.
In this embodiment, this coupling capacitance C1 can provide a coupling channel to above-mentioned disturbing pulse, thereby improved the speed that 10 pairs of disturbing pulses of control chip respond, therefore can further shorten the electromagnetic heating module work time under high pressure, thereby reduce the damage to each device of electromagnetic heating module.
The utility model also provides a kind of electric pressure cooker, and this electric pressure cooker comprises Electromagnetic Heating control circuit, and the structure of this Electromagnetic Heating control circuit can, with reference to above-described embodiment, not repeat them here.Naturally, because the electric pressure cooker of the present embodiment has adopted the technical scheme of above-mentioned Electromagnetic Heating control circuit, so this electric pressure cooker has all beneficial effects of above-mentioned Electromagnetic Heating control circuit.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.

Claims (6)

1. an Electromagnetic Heating control circuit, comprise for controlling the control chip of electromagnetic heating module work, it is characterized in that, also comprise the first diode, the second diode, the first resistance and the second resistance, the anode of wherein said the first diode is connected with civil power zero line, and the negative electrode of the first diode is connected with the negative electrode of the second diode; The anode of described the second diode is connected with civil power live wire, and negative electrode is connected with one end of the second resistance by the first resistance; The other end of described the second resistance is connected with the earth terminal of described control chip; The public connecting end of described the first resistance and the second resistance is connected to the voltage detecting end of described control chip, and described control chip is controlled the operating state of described electromagnetic heating module according to the voltage swing of the public connecting end of described the first resistance and the second resistance.
2. Electromagnetic Heating control circuit as claimed in claim 1, it is characterized in that, described Electromagnetic Heating control circuit also comprises the 3rd resistance and the 4th resistance, one end of described the 3rd resistance is connected with the negative electrode of described the first diode, and the other end is connected with the earth terminal of described control chip by described the 4th resistance; The public connecting end of described the 3rd resistance and the 4th resistance is connected to the comparator positive input of described control chip; When the voltage of the public connecting end of described the 3rd resistance and the 4th resistance is greater than preset value, described control chip is controlled described electromagnetic heating module and is quit work.
3. Electromagnetic Heating control circuit as claimed in claim 2, is characterized in that, described Electromagnetic Heating control circuit also comprises coupling capacitance, and described coupling capacitance is parallel to the two ends of described the 3rd resistance.
4. an electric pressure cooker, it is characterized in that, comprise Electromagnetic Heating control circuit, described Electromagnetic Heating control circuit comprises control chip, the first diode, the second diode, the first resistance and the second resistance for controlling electromagnetic heating module work, the anode of wherein said the first diode is connected with civil power zero line, and the negative electrode of the first diode is connected with the negative electrode of the second diode; The anode of described the second diode is connected with civil power live wire, and negative electrode is connected with one end of the second resistance by the first resistance; The other end of described the second resistance is connected with the earth terminal of described control chip; The public connecting end of described the first resistance and the second resistance is connected to the voltage detecting end of described control chip, and described control chip is controlled the operating state of described electromagnetic heating module according to the voltage swing of the public connecting end of described the first resistance and the second resistance.
5. electric pressure cooker as claimed in claim 4, it is characterized in that, described Electromagnetic Heating control circuit also comprises the 3rd resistance and the 4th resistance, and one end of described the 3rd resistance is connected with the negative electrode of described the first diode, and the other end is connected with the earth terminal of described control chip by described the 4th resistance; The public connecting end of described the 3rd resistance and the 4th resistance is connected to the comparator positive input of described control chip; When the voltage of the public connecting end of described the 3rd resistance and the 4th resistance is greater than preset value, described control chip is controlled described electromagnetic heating module and is quit work.
6. electric pressure cooker as claimed in claim 5, is characterized in that, described Electromagnetic Heating control circuit also comprises coupling capacitance, and described coupling capacitance is parallel to the two ends of described the 3rd resistance.
CN201320571908.9U 2013-09-13 2013-09-13 Electromagnetic heating control circuit and electric pressure cooker Expired - Fee Related CN203504786U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320571908.9U CN203504786U (en) 2013-09-13 2013-09-13 Electromagnetic heating control circuit and electric pressure cooker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320571908.9U CN203504786U (en) 2013-09-13 2013-09-13 Electromagnetic heating control circuit and electric pressure cooker

Publications (1)

Publication Number Publication Date
CN203504786U true CN203504786U (en) 2014-03-26

Family

ID=50335723

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320571908.9U Expired - Fee Related CN203504786U (en) 2013-09-13 2013-09-13 Electromagnetic heating control circuit and electric pressure cooker

Country Status (1)

Country Link
CN (1) CN203504786U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016077962A1 (en) * 2014-11-17 2016-05-26 魏晓敏 Electromagnetic electric apparatus and electromagnetic heating control circuit
WO2021056956A1 (en) * 2019-09-26 2021-04-01 海信视像科技股份有限公司 Display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016077962A1 (en) * 2014-11-17 2016-05-26 魏晓敏 Electromagnetic electric apparatus and electromagnetic heating control circuit
WO2021056956A1 (en) * 2019-09-26 2021-04-01 海信视像科技股份有限公司 Display device

Similar Documents

Publication Publication Date Title
CN102662104B (en) Zero-crossing detection method and circuit
CN203101494U (en) AC (alternating current) electric supply power failure detection circuit, equipment and system
CN202583311U (en) Alternating current zero-crossing detection circuit
CN104269893B (en) Charge control method and charging system
CN204362337U (en) Electromagnetic Heating control circuit and electromagnetic heating apparatus
CN203376387U (en) Over-voltage detection circuit and PFC circuit using the same
CN204287446U (en) A kind of power-fail detection circuit
CN204391679U (en) A kind of leakage current detection protection circuit
CN204131085U (en) Based on the battery system anti-surge circuit of hot plug chip
CN203504786U (en) Electromagnetic heating control circuit and electric pressure cooker
CN201955387U (en) Zero-crossing detecting circuit with low power consumption for carrier wave communication
CN202433997U (en) Specific circuit breaker circuit for pre-payment electricity meter
CN103795029A (en) Leakage current detection protection circuit of direct-current remote supply power system
CN204731307U (en) AC voltage detection circuit
CN201663721U (en) Induction cooker controller and induction cooker
CN203504787U (en) Electromagnetic heating circuit and electric pressure cooker
CN203759106U (en) Commercial power zero cross detection circuit
CN209218057U (en) A kind of field-effect tube driving circuit
CN203312785U (en) Lightning protection circuit of telemetry terminal machine
CN203324355U (en) Microwave-system diverse self-checking circuit
CN202330540U (en) Zero-cross detection circuit
CN203466962U (en) Audio port identification circuit and communication device
CN202888807U (en) Overcurrent protection circuit and switch power supply for half-bridge circuit
CN203261005U (en) LED constant-current over-temperature protection circuit and LED lamp
CN103091543B (en) Current detection circuit, constant current circuit and battery charging and discharging protective system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140326

Termination date: 20200913