CN102622005B - Electric rice cooker control circuit - Google Patents
Electric rice cooker control circuit Download PDFInfo
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- CN102622005B CN102622005B CN201110031527.7A CN201110031527A CN102622005B CN 102622005 B CN102622005 B CN 102622005B CN 201110031527 A CN201110031527 A CN 201110031527A CN 102622005 B CN102622005 B CN 102622005B
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- heating plate
- electromagnetic relay
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- power supply
- insulation
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Abstract
The invention relates to an electric rice cooker control circuit which comprises a power supply, an electric heating plate, an insulation heating plate, an electromagnetic relay, a temperature controller and a heating switch of the electromagnetic relay. The heating switch, the insulation heating plate and the temperature controller are connected in series to form a first series-connected branch. The switch end of the electromagnetic relay and the electric heating plate are connected in series to form a second series-connected branch. Thenormally closed contact of the electromagnetic relay is connected with the electric heating plate. The first series-connected branch and the second series-connected branch are connected in parallel to form a parallel-connected branch. The first end of the parallel-connected branch is connected with the pole of the power supply. The second end of the parallel-connected branch is connected with the second end of the coil of the electromagnetic relay. The first end of the coil of the electromagnetic relay is connected with the pole of the power supply. The electric rice cooker provided by the invention assists in solving the technology problem of low-reliability of the prior art according to which magnetic steel control is employed, by using electronic components with high reliability like temperature controller and electromagnetic relay.
Description
Technical field
The present invention relates to electric cooker field, particularly relate to a kind of control circuit of electric rice cooker.
Background technology
The electric cooker of prior art mainly adopts microelectric technique and mechanical type two kinds of control modes, and wherein mechanical type electric cooker uses magnetic steel temperature limiter to realize the function of cooking usually.The electric cooker of the magnetic steel temperature limiter of prior art, by the interoperation of the parts such as magnetic steel temperature limiter, lever, microswitch, rotating shaft, carrys out the break-make of control circuit, thus controls whole process of cooking.When after cooked, magnet steel action and disconnect electric heating plate, but through client feedback, often there is stuck phenomenon and electric cooker broken down in magnet steel, cause electric heating plate to melt the situations such as electric cooker burning machine, the reliability of electric cooker is lower.
Summary of the invention
The invention provides a kind of control circuit of electric rice cooker, it is by electronic components such as the higher temperature controller of reliability and electromagnetic relays, solves the technical matters that reliability that prior art controlled by magnet steel is low.
The present invention is achieved in that
A kind of control circuit of electric rice cooker, it includes: power supply, electric heating plate R
1, heat-retaining hot plate R
2, electromagnetic relay G, for controlling described electric heating plate R
1temperature controller T and heater switch K for controlling described electromagnetic relay G
2, described heater switch K
2with described heat-retaining hot plate R
2, described temperature controller T and electromagnetic relay G coils connected in series form the first series arm, the switch terminals of described electromagnetic relay G and described electric heating plate R
1series connection formation second series arm, and the normally opened contact of described electromagnetic relay G and described electric heating plate R
1be connected, described first series arm is in parallel with described second series arm forms parallel branch, the first end of described parallel branch is extremely connected with the L of described power supply, second end of described parallel branch is connected with the N pole of described power supply, and the first end of the coil of described electromagnetic relay is extremely connected with the N of described power supply.
Preferably, described control circuit of electric rice cooker also comprises:
Insulation indicating member, it is in parallel with described heat-retaining hot plate R2, and its first end is extremely connected with the L of described power supply, its second end and described electric heating plate R
1first end be connected;
And heating indicating member, itself and described electric heating plate R
1parallel connection, its first end is connected with described insulation indicating member, and the other end is extremely connected with the N of described power supply.
Preferably, described insulation indicating member comprises the insulation pilot lamp DX of series connection
1and the 3rd resistance; Described heating indicating member comprises the burner on light DX of series connection
2and the 4th resistance.
Preferably, described first series arm also comprises the 3rd diode, and described 3rd diode is connected with described heater switch, and the negative electrode of described 3rd diode is connected with described heater switch, and the anode of described 3rd diode is extremely connected with the L of described power supply.
Preferably, described control circuit of electric rice cooker also includes:
Second diode, it is series at described first series arm, its anode and described insulation electric heating plate R
2the second end be connected, its negative electrode and described temperature controller T-phase company;
4th diode, its anode and described insulation electric heating plate R
2first end be connected, its negative electrode and described electric heating plate R
1first end be connected;
And the 5th diode, itself and described first series arm part in parallel, its negative electrode is extremely connected with the L of described power supply, and its anode is connected with the anode of described second diode.
Preferably, described control circuit of electric rice cooker also includes Thermal Cutoffs FU1, and its first end is connected with the L pole of described power supply, and the second end is connected with the first end of described first series arm, the second series arm.
Preferably, described control circuit of electric rice cooker also comprises:
The heat-insulation switch unit be connected in parallel, the first diode, electric capacity and the 7th resistance form the second parallel branch, the first end of described second parallel branch is connected with the first end of described electromagnetic relay G coil, its second end is connected with the second end of described electromagnetic relay G coil, and described heat-insulation switch unit comprises: the heat-insulation switch be connected in series and the 5th resistance.
The present invention, relative to prior art, has following beneficial effect:
Control circuit of electric rice cooker of the present invention, it forms the trigger circuit of a small area analysis by electronic devices and components, can keep attracting state after electromagnetic relay adhesive, and without the need to passing through heater switch K
2closed, disconnect the action controlling electric cooker, ends of cooking, circuit disconnects automatically, the reliability of raising electric cooker.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of control circuit of electric rice cooker embodiment one of the present invention;
Fig. 2 is the circuit diagram of control circuit of electric rice cooker embodiment two of the present invention;
Fig. 3 is the circuit diagram of control circuit of electric rice cooker embodiment three of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail:
As shown in Figure 1, control circuit of electric rice cooker of the present invention, it includes: power supply 10, electric heating plate R
1, heat-retaining hot plate R
2, electromagnetic relay G, for controlling described electric heating plate R
1temperature controller T and heater switch K for controlling described electromagnetic relay G
2, described heater switch K
2with described heat-retaining hot plate R
2, described temperature controller T and electromagnetic relay G coils connected in series form the first series arm, the switch terminals of described electromagnetic relay G and described electric heating plate R
1series connection formation second series arm, and the normally opened contact of described electromagnetic relay G and described electric heating plate R
1be connected, described first series arm is in parallel with described second series arm forms parallel branch, the first end of described parallel branch is extremely connected with the L of described power supply 10, second end of described parallel branch is connected with the N pole of described power supply, and the first end of the coil of described electromagnetic relay is extremely connected with the N of described power supply.
Described control circuit of electric rice cooker also comprises: insulation indicating member, its first end is extremely connected with the L of described power supply 10, its second end and described electric heating plate R
1first end be connected; And heating indicating member, itself and described electric heating plate R
1parallel connection, its first end is connected with described insulation indicating member, and the other end is extremely connected with the N of described power supply.Preferably, described insulation indicating member comprises the insulation pilot lamp DX of series connection
1and the 3rd resistance; Described heating indicating member comprises the burner on light DX of series connection
2and the 4th resistance.Described insulation pilot lamp DX
1and described burner on light DX
2respectively described electric cooker be in keeping warm mode and cook state time luminous, enable user clear and definite know the work that electric cooker is in.
Preferably, in order to described control circuit of electric rice cooker can be made more stable, it also comprises: the heat-insulation switch unit be connected in parallel, the first diode D for voltage stabilizing
1, electric capacity C and the 7th resistance R
7form the second parallel branch, the first end of described second parallel branch is connected with the first end of described electromagnetic relay G coil, and its second end is connected with the second end of described electromagnetic relay G coil.Wherein, described heat-insulation switch K
1and the 5th resistance R
5.
Preferably, described first series arm also comprises the 3rd diode D
3, described 3rd diode D
3with described heater switch K
2series connection, described 3rd diode D
3negative electrode be connected with described heater switch K2, the anode of described 3rd diode D3 is extremely connected with the L of described power supply 10.Described control circuit of electric rice cooker also includes: the second diode D
2, it is series at described first series arm, its anode and described insulation electric heating plate R
2the second end be connected, its negative electrode and described temperature controller T-phase company; 4th diode, its negative electrode and described insulation electric heating plate R
2first end be connected, its anode and described electric heating plate R
1first end be connected; And the 5th diode D
5, itself and described first series arm part in parallel, its negative electrode is extremely connected with the L of described power supply 10, its anode and described second diode D
2anode be connected.
In the present embodiment, in order to ensure the reliability service of described control circuit of electric rice cooker, described control circuit of electric rice cooker also includes Thermal Cutoffs FU
1, its first end is connected with the L pole of described power supply, and the second end is connected with the first end of described first series arm, the second series arm.
The principle of work of control circuit of electric rice cooker of the present invention is as follows:
When cooking, measuring appropriate rice and water sum in proportion, plug in, described electric heating plate R
1all be communicated with described insulation electric heating plate R2, but now, described electric heating plate R
1with described insulation electric heating plate R
2for being connected in series, due to described insulation electric heating plate R
2resistance much larger than described electric heating plate R
1, so be now incubated electric heating plate R
2real power be greater than electric heating plate R
1real power, be now incubated electric heating plate R
2real power and its rated power closely, electric heating plate and R
1power then well below its rated power, therefore only have insulation electric heating plate R
2work, electric cooker is in keeping warm mode, accordingly, described insulation pilot lamp DX
1luminescence, the duty that prompting user electric cooker is now located is keeping warm mode;
When pressing heater switch K
2time, due to the existence of loop current, the coil sides adhesive of described electromagnetic relay G, and keep attracting state, described electric heating plate R always
1heating, described electric cooker is in heated condition, described burner on light DX
2luminescence, electric cooker is in heated condition always;
Until press described heat-insulation switch K
1or reach described temperature controller T to disconnect because reaching operating temperature, the coil sides of electromagnetic relay G disconnects, described insulation electric heating plate R
2heating, accordingly, described insulation pilot lamp DX
1luminescence, described burner on light DX
2extinguish;
Complete the process of cooking.
It should be noted that in electric cooker complete machine heating process, if need to enter keeping warm mode, directly press described heat-insulation switch K
1, the coil sides of electromagnetic relay G then disconnects, and electric cooker enters keeping warm mode.
As shown in Figure 2, which illustrate the circuit diagram of the embodiment two of control circuit of electric rice cooker of the present invention, be with embodiment one difference, increase by the 6th resistance R
6, described 6th resistance R
6first end be connected with the second end of described electromagnetic relay G coil, second end of described 6th resistance R6 is connected to described temperature controller T and described heater switch K
2between.Working method and the embodiment one of the present embodiment are similar, and it adopts insulation electric heating plate R
2carry out Heat preservation, when electric cooker complete machine enters keeping warm mode, described insulation electric heating plate R
2heat and keep, the heating power of electric cooker can adjust accordingly according to different type of machines.
As shown in Figure 3, which illustrate the circuit diagram of the embodiment three of control circuit of electric rice cooker of the present invention, be with embodiment one difference, described heat-retaining hot plate R
2can be replaced bimetallic temperature controller T
1, the 6th diode D
6and the 6th resistance R
6, described bimetallic temperature controller T
1with described 6th diode D
6series connection, and in parallel with described insulation indicating member, described bimetallic temperature controller T
1extremely be connected with the L of described power supply 10, described 6th diode D
6the second end and described 3rd resistance R
3the second end be connected, described 6th resistance R
6first end be connected with the second end of described electromagnetic relay G coil, described 6th resistance R
6second end is connected to described temperature controller T and described heater switch K
2between.Working method and the embodiment one of the present embodiment are similar, and it adopts the 6th resistance R
6carry out step-down, and do not adopt insulation electric heating plate R
2heating, by bimetal strip thermostat T
1preservation and controlling is carried out to electric cooker, when reaching holding temperature, bimetal strip thermostat T
1disconnect, electric cooker complete machine does not heat, when not reaching holding temperature, and described electric heating plate R
1heating, electric cooker Heat preservation power only has the half of heating power.
These are only specific embodiments of the invention, do not limit protection scope of the present invention with this; Not violating any replacement and improvement that the basis of the present invention's design is done, all belong to protection scope of the present invention.
Claims (7)
1. a control circuit of electric rice cooker, is characterized in that, it includes: power supply, electric heating plate R
1, heat-retaining hot plate R
2, electromagnetic relay G, for controlling described electric heating plate R
1temperature controller T and heater switch K for controlling described electromagnetic relay G
2, described heater switch K
2with described heat-retaining hot plate R
2, described temperature controller T and electromagnetic relay G coils connected in series form the first series arm, the switch terminals of described electromagnetic relay G and described electric heating plate R
1series connection formation second series arm, and the normally opened contact of described electromagnetic relay G and described electric heating plate R
1be connected, described first series arm is in parallel with described second series arm forms parallel branch, the first end of described parallel branch is extremely connected with the L of described power supply, second end of described parallel branch is connected with the N pole of described power supply, and the first end of the coil of described electromagnetic relay is extremely connected with the N of described power supply.
2. control circuit of electric rice cooker as claimed in claim 1, it is characterized in that, it also comprises:
Insulation indicating member, it is in parallel with described heat-retaining hot plate R2, and its first end is extremely connected with the L of described power supply, its second end and described electric heating plate R
1first end be connected;
And heating indicating member, itself and described electric heating plate R
1parallel connection, its first end is connected with described insulation indicating member, and the other end is extremely connected with the N of described power supply.
3. control circuit of electric rice cooker as claimed in claim 2, it is characterized in that, described insulation indicating member comprises the insulation pilot lamp DX of series connection
1and the 3rd resistance; Described heating indicating member comprises the burner on light DX of series connection
2and the 4th resistance.
4. control circuit of electric rice cooker as claimed in claim 1, it is characterized in that, it also comprises:
The heat-insulation switch unit be connected in parallel, the first diode, electric capacity and the 7th resistance form the second parallel branch, the first end of described second parallel branch is connected with the first end of described electromagnetic relay G coil, its second end is connected with the second end of described electromagnetic relay G coil, and described heat-insulation switch unit comprises: the heat-insulation switch be connected in series and the 5th resistance.
5. control circuit of electric rice cooker as claimed in claim 1, it is characterized in that, described first series arm also comprises the 3rd diode, described 3rd diode is connected with described heater switch, the negative electrode of described 3rd diode is connected with described heater switch, and the anode of described 3rd diode is extremely connected with the L of described power supply.
6. control circuit of electric rice cooker as claimed in claim 1, it is characterized in that, it also includes:
Second diode, it is series at described first series arm, its anode and described insulation electric heating plate R
2the second end be connected, its negative electrode and described temperature controller T-phase company;
4th diode, its negative electrode and described insulation electric heating plate R
2first end be connected, its anode and described electric heating plate R
1first end be connected;
And the 5th diode, itself and described first series arm part in parallel, its negative electrode is extremely connected with the L of described power supply, and its anode is connected with the anode of described second diode.
7. control circuit of electric rice cooker as claimed in claim 1, it is characterized in that, it also includes Thermal Cutoffs FU1, and its first end is connected with the L pole of described power supply, and the second end is connected with the first end of described first series arm, the second series arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110031527.7A CN102622005B (en) | 2011-01-29 | 2011-01-29 | Electric rice cooker control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110031527.7A CN102622005B (en) | 2011-01-29 | 2011-01-29 | Electric rice cooker control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102622005A CN102622005A (en) | 2012-08-01 |
| CN102622005B true CN102622005B (en) | 2015-03-04 |
Family
ID=46561968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110031527.7A Active CN102622005B (en) | 2011-01-29 | 2011-01-29 | Electric rice cooker control circuit |
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| Country | Link |
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| CN (1) | CN102622005B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103169382B (en) * | 2013-03-26 | 2014-12-10 | 江苏正本净化节水科技实业有限公司 | Water dispenser heating control and display circuit |
| CN105223987B (en) * | 2015-10-12 | 2017-12-12 | 珠海格力电器股份有限公司 | The control method and system of a kind of electric heater |
| CN107411573A (en) * | 2016-05-24 | 2017-12-01 | 佛山市顺德区美的电热电器制造有限公司 | The heating control circuit of electric cooking pot and there is its electric cooking pot |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2634984Y (en) * | 2003-08-15 | 2004-08-25 | 张彪域 | Magnetic steel and lever less electric cooker |
| JP2006026204A (en) * | 2004-07-20 | 2006-02-02 | Mitsubishi Electric Corp | Electric cooker |
| CN201341795Y (en) * | 2009-02-17 | 2009-11-11 | 珠海格力电器股份有限公司 | Rice cooker and control circuit thereof |
| CN201993658U (en) * | 2011-01-29 | 2011-09-28 | 珠海格力电器股份有限公司 | Control circuit of electric rice cooker |
-
2011
- 2011-01-29 CN CN201110031527.7A patent/CN102622005B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2634984Y (en) * | 2003-08-15 | 2004-08-25 | 张彪域 | Magnetic steel and lever less electric cooker |
| JP2006026204A (en) * | 2004-07-20 | 2006-02-02 | Mitsubishi Electric Corp | Electric cooker |
| CN201341795Y (en) * | 2009-02-17 | 2009-11-11 | 珠海格力电器股份有限公司 | Rice cooker and control circuit thereof |
| CN201993658U (en) * | 2011-01-29 | 2011-09-28 | 珠海格力电器股份有限公司 | Control circuit of electric rice cooker |
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| Publication number | Publication date |
|---|---|
| CN102622005A (en) | 2012-08-01 |
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