CN2053420U - Electromagnetically inductive heater - Google Patents
Electromagnetically inductive heater Download PDFInfo
- Publication number
- CN2053420U CN2053420U CN 89205302 CN89205302U CN2053420U CN 2053420 U CN2053420 U CN 2053420U CN 89205302 CN89205302 CN 89205302 CN 89205302 U CN89205302 U CN 89205302U CN 2053420 U CN2053420 U CN 2053420U
- Authority
- CN
- China
- Prior art keywords
- model
- utility
- circuit
- controllable silicon
- parallel resonance
- 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.)
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- General Induction Heating (AREA)
Abstract
The utility model discloses an electromagnetic induction heater mainly for cooking food in family, hotel, etc. The utility model is composed of a main circuit, a control circuit and a range body. An induction heating coil in the main circuit and a capacitor compose a parallel resonance circuit. After the parallel resonance circuit is connected in series with a static thyristor and an inductor, the parallel resonance circuit is connected to a direct current power supply. The utility model has the advantages of simple structure, low power consumption and high thermal efficiency, and the utility model can be cooperated with ferromagnetic heating utensils of various specifications and shapes.
Description
The utility model relates to a kind of electromagnetic induction heater, mainly is applicable to non-industrialness heating object and cooking foods such as family, restaurant.
Existing electromagnetic induction heater utilizes the conducting of large power triode usually and ends, and periodically to load coil and capacitances to supply power, forms alternating magnetic field and comes heating object.Specially permit out hope as Japan and announce clear 63-25473 and specially permit out hope and disclose the disclosed electromagnetic induction heater of clear 61-45591, be direct mode of heating, than the heat efficiency height of indirect mode.But because of large power triode two ends Fan Xiang the diode of And connection when triode bears reverse voltage with the conducting consumed power, the whole time that needs conducting at triode, its base stage all need consume certain power, and the conducting of triode and by being subject to the influence of external circuit, these all will increase the power consumption of circuit.
Task of the present utility model provides a kind of electromagnetic induction heater, and it can further reduce the power consumption of induction heater, carries high thermal efficiency And and makes structure more simple.
Task of the present utility model is finished with the following method: with the large power triode in the alternative main circuit of controllable silicon.Load coil and Dian Rong And connection , Ci And connection circuit one end is connected with power supply, the other end is received the silicon controlled negative electrode, the silicon controlled anode with receive on the power supply after inductance is connected.By load coil with the frequency of the resonance frequency of And connection electric capacity decision controllable silicon triggering and conducting, make power cycle ground by controllable silicon to load coil power supply And Xing Cheng And connection resonance between load coil and electric capacity, produce the high frequency alternating flux thus and pass heating vessel and come heating object.
Because itself has positive feedback effect controllable silicon, after it was triggered conducting, its negative electrode and the pressure drop of anode two ends were stabilized in about 1 volt, made external circuit not prolong its opening process, and along with the controllable silicon shortening of service time, the institute of controllable silicon wasted work rate own will reduce.Because of the controllable silicon in this heater bears reverse voltage, electric current is zero and turn-off naturally, does not also need extra power during shutoff, and the controllable silicon two ends do not need instead to join diode to And, so it is low that circuit power of the present utility model consumes, structure is also simpler.
Below with reference to accompanying drawing the utility model is described in further detail.
Fig. 1 is a kind of electrical schematic diagram of the utility model.
Fig. 2 is the electric circuit diagram of a kind of control circuit of the utility model.
With reference to accompanying drawing, the utility model mainly is made up of several parts of main circuit, control circuit and stove.220 volts of alternating currents become DC power supply after rectification, filtering.Load coil L in the main circuit (1)
4And capacitor C
2The negative electrode K that And connection , Ci And connection circuit one end links to each other with DC power supply, the other end is received controllable silicon KK, the anode A of controllable silicon KK and inductance L
3Receive on the DC power supply after the series connection.
Starting circuit and phase detecting circuit are arranged in the control circuit of the present utility model.Starting circuit of the present utility model is by voltage transformer L
3, reverser (2) and pulse generator (3) form.Inverter (2) is by bridge rectifier D
1~D
4, capacitor C
6, voltage-stabiliser tube DW
1With switch triode T
1Constitute.As voltage transformer L
5When both end voltage is zero, inverter (2) output high level, pulse generator (3) sends positive pulse, makes silicon controlled toggle system generation trigger impulse, controllable silicon KK conducting, resonant circuit is started working; As voltage transformer L
5When there was an alternating voltage at two ends, this alternating voltage was through D
1~D
4Bridge rectifier, capacitor C
6, resistance R
1Filtering, voltage-stabiliser tube DW
1Slicing output high level is again through switch triode T
1Output low level oppositely, pulse generator (3) stops to send pulse.
Phase detecting circuit of the present utility model is used to control controllable silicon KK at load coil L
4And capacitor C
2The opportunity of conducting during resonance is mainly by voltage transformer L
6, diode D
5, voltage-stabiliser tube DW
2, resistance R
7And Schmidt trigger (4) is formed.Work as capacitor C
2With load coil L
4When resonance takes place, voltage transformer L
6Two ends will induce alternating voltage.Work as capacitor C
2When the polarity of both end voltage is identical with electric power polarity, diode D
5Export corresponding half-wave voltage, through voltage-stabiliser tube DW
2Slicing is by resistance R
7, R
8Capacitor C
7Lag behind and export the input of forward voltage, Schmidt trigger (4) output positive pulse to Schmidt trigger (4).Change resistance R
7Resistance just can change the opportunity that controllable silicon KK triggers, change the power of induction heater thus.Monostable trigger (5) and power amplifier (6) constitute the trigger system of controllable silicon KK.Positive pulse by starting circuit or phase detecting circuit output inputs to monostable trigger (5), the pulse And that is sent the required triggering width of controllable silicon KK by monostable trigger (5) adds between the control utmost point G and negative electrode K of controllable silicon KK through power amplifier (6), makes controllable silicon KK be in conducting state.When controllable silicon KK is subjected to reverse voltage, it will be in off state.Load coil L
4And capacitor C
2Determined the frequency of controllable silicon KK triggering and conducting.With reference to Fig. 1, controllable silicon KK can select fast controllable silicon for use, and its on-state average current is 10~30 amperes, oppositely ceiling voltage is 450~1000 volts.Load coil L
4With multiply copper cash or enamelled wire coiling, its inductance value is 1.56~0.021 milihenries.Inductance L
3Inductance value be load coil L
41/4~1/10, comparatively desirable.Capacitor C
2Adopt the polypropylene metal film electric capacity of 15.2~0.15 microfarads.With reference to Fig. 2, switch triode T
1, T
2, T
3, T
4, T
5, T
6Model select 3DK5A type, T for use
7Adopt the 3DA15A type.BT in the pulse generator (3) adopts BT33 type unijunction transistor.The output signal of starting circuit and phase detecting circuit be " or " state, by D
6And D
7Two diodes constitute, and select 2CK73 type diode for use.The utility model can have protective devices such as overload, zero load with the ferromagnetism heating vessel adapted , And of all size, shape.
Claims (1)
1, a kind of electromagnetic induction heater is made up of several parts of main circuit, control circuit and stove, it is characterized in that the load coil L in the main circuit
4And capacitor C
2The negative electrode K that And connection , Ci And connection circuit one end is connected with power supply, the other end is received controllable silicon KK, the anode A of controllable silicon KK and inductance L
3Receive on the power supply after the series connection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 89205302 CN2053420U (en) | 1989-08-09 | 1989-08-09 | Electromagnetically inductive heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 89205302 CN2053420U (en) | 1989-08-09 | 1989-08-09 | Electromagnetically inductive heater |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2053420U true CN2053420U (en) | 1990-02-21 |
Family
ID=4862494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 89205302 Withdrawn CN2053420U (en) | 1989-08-09 | 1989-08-09 | Electromagnetically inductive heater |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2053420U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100424436C (en) * | 2005-09-30 | 2008-10-08 | 洪祥鹰 | Electronic water heater |
CN104284466A (en) * | 2013-07-11 | 2015-01-14 | 美的集团股份有限公司 | Intelligent control circuit of multiple electromagnetic heating units |
-
1989
- 1989-08-09 CN CN 89205302 patent/CN2053420U/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100424436C (en) * | 2005-09-30 | 2008-10-08 | 洪祥鹰 | Electronic water heater |
CN104284466A (en) * | 2013-07-11 | 2015-01-14 | 美的集团股份有限公司 | Intelligent control circuit of multiple electromagnetic heating units |
CN104284466B (en) * | 2013-07-11 | 2016-05-11 | 美的集团股份有限公司 | The control circuit of many Electromagnetic Heatings of intelligence unit |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C19 | Lapse of patent right due to non-payment of the annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |