CN204141641U - Electricity cooking pot and controller for heat sink thereof - Google Patents
Electricity cooking pot and controller for heat sink thereof Download PDFInfo
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- CN204141641U CN204141641U CN201420407369.XU CN201420407369U CN204141641U CN 204141641 U CN204141641 U CN 204141641U CN 201420407369 U CN201420407369 U CN 201420407369U CN 204141641 U CN204141641 U CN 204141641U
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Abstract
The utility model discloses a kind of electric cooking pot and controller for heat sink thereof, wherein the controller for heat sink of electric cooking pot comprises: rectification circuit, and rectification circuit comprises the first output and the second output, the second output head grounding; Cooling fan circuit, cooling fan circuit comprises energy storage inductor, switching tube, diode and filter capacitor, one end of energy storage inductor is connected with the negative pole end of filter capacitor respectively with the first output, the other end of energy storage inductor is connected with the anode of diode respectively with one end of switching tube, the other end ground connection of switching tube, the negative electrode of diode is connected with the positive terminal of filter capacitor, and positive terminal and the negative pole end of filter capacitor are parallel with blower fan; Detect the temperature sensing circuit of the operating temperature of electric cooking pot; Control circuit, control circuit is connected with temperature sensing circuit with the control end of switching tube respectively, and control circuit controls according to the operating temperature switch tube of electric cooking pot.The circuit of this controller for heat sink is simple and reliable, easily realizes.
Description
Technical field
The utility model relates to living electric apparatus technical field, particularly a kind of controller for heat sink of electric cooking pot and a kind of electric cooking pot with this controller for heat sink.
Background technology
At present, the type of cooling that the cooling system of existing Household induction cooker adopts blower fan to dry mostly is to reach radiating effect, but the shortcoming of this electromagnetic oven is: no matter electromagnetism in-furnace temperature how, also no matter the main heater members temperature of electromagnetic oven is how, blower fan runs up all the time, the wind speed of such blower fan and air quantity are all changeless, therefore can not regulate according to the radiating requirements of reality.Because blower fan always works in high-speed rotation state, the operating current of blower fan is quite large, and consequent noise is also very large, so not only can not energy-conserving and environment-protective, also can reduce the service life of blower fan.
A kind of stepless speed changing heat radiation electromagnetic oven is proposed in correlation technique, its circuit topological structure as shown in Figure 1, this stepless speed changing heat radiation electromagnetic oven solves blower fan stepless speed regulation problem, but when blower fan short circuit breaks down time, during triode Q81 and Q82 conducting simultaneously, the rectifier bridge output short-circuit of electromagnetic oven can be caused, rectifier bridge even IGBT (Insulated Gate Bipolar Transistor can be caused like this, insulated gate bipolar transistor) directly burn, make the reliability of circuit not high, and fan speed regulating circuit employs two switching tubes, cost is higher.
In addition, also have in correlation technique and adopt BUCK circuit characteristic to be adjusted with the speed-regulating function realizing blower fan by the power supply VCC powered to fan, as shown in Figures 2 and 3.But, the shortcoming that these two circuit exist is: the power supply VCC larger ripple of generation or VCC can be caused to beat larger when blower fan is operated in maximum load or rotation speed of fan changes greatly, and VCC generally takes from system supplymentary power supply, other module work of system can be caused so abnormal, power supply VCC shorted to earth is directly caused equally when blower fan short circuit, thus damage the circuit of power supply VCC, cause the reliability of circuit not high.
Utility model content
The purpose of this utility model is intended at least solve above-mentioned technological deficiency.
For this reason, an object of the present utility model is the controller for heat sink proposing a kind of electric cooking pot, and the circuit of this controller for heat sink is simple and reliable, easily realizes.
Another object of the present utility model is to propose a kind of electric cooking pot.
For achieving the above object, the controller for heat sink of a kind of electric cooking pot that the utility model proposes, comprise: the alternating current of input is converted to galvanic rectification circuit, described rectification circuit comprises the first output and the second output, described second output head grounding; Cooling fan circuit, described cooling fan circuit comprises energy storage inductor, switching tube, diode and filter capacitor, one end of described energy storage inductor is connected with the negative pole end of described filter capacitor respectively with described first output, the other end of described energy storage inductor is connected with the anode of described diode respectively with one end of described switching tube, the other end ground connection of described switching tube, the negative electrode of described diode is connected with the positive terminal of described filter capacitor, and positive terminal and the negative pole end of described filter capacitor are parallel with blower fan; Detect the temperature sensing circuit of the operating temperature of described electric cooking pot; And control circuit, described control circuit is connected with described temperature sensing circuit with the control end of described switching tube respectively, and described control circuit controls described switching tube according to the operating temperature of the described electric cooking pot that described temperature sensing circuit detects.
According to the controller for heat sink of electric cooking pot of the present utility model, the operating temperature of electric cooking pot is detected in real time by temperature sensing circuit, control circuit carries out according to the operating temperature switch tube of electric cooking pot the rotating speed controlling blower fan, reach the object that the rotating speed that adjusts blower fan in real time according to the operating temperature of electric cooking pot rationally dispels the heat to realize electric cooking pot, wherein, because blower fan and other circuit modules are all the circuit of isolating, when blower fan is because of fault when short circuit, only can damage cooling fan circuit, other fault can not be caused, effectively can improve the reliability of circuit, ensure the reliable and stable operation of electric cooking pot, and the circuit structure of this controller for heat sink is simple, can reduce costs.
Preferably, described switching tube is triode, and the base stage of described triode is connected with described control circuit, and the colelctor electrode of described triode is connected with the other end of described energy storage inductor respectively with the anode of described diode, the grounded emitter of described triode.
Particularly, described temperature sensing circuit comprises: the first resistance, and one end of described first resistance is connected with the power supply preset; First temperature sensor, one end of described first temperature sensor is connected with the other end of described first resistance and described control circuit respectively, the other end ground connection of described first temperature sensor.
Further, described temperature sensing circuit also comprises: the second resistance, and one end of described second resistance is connected with described default power supply; Second temperature sensor, one end of described second temperature sensor is connected with the other end of described second resistance and described control circuit respectively, the other end ground connection of described second temperature sensor.
Further, between the input and the alternating current of described input of described rectification circuit, also anti-jamming circuit is connected with.
Wherein, described anti-jamming circuit comprises: fuse, and one end of described fuse is connected with the first end of the alternating current of described input, and the other end of described fuse is connected with the first input end of described rectification circuit; Variable resistor, described variable-resistance one end is connected with the other end of described fuse, and the described variable-resistance other end is connected with the second end of the alternating current of described input, and the second end of the alternating current of described input is connected with the second input of described rectification circuit; First electric capacity, described first Capacitance parallel connection is at described variable-resistance two ends.
Particularly, when described electric cooking pot is Electromagnetic Heating cooking pot, described Electromagnetic Heating cooking pot comprises: filter circuit, and one end of described filter circuit is connected with the first output of described rectification circuit, and the other end of described filter circuit is connected with the second output of described rectification circuit; Resonance circuit, one end of described resonance circuit is connected with the output of described filter circuit; Power device, one end of described power device is connected with the other end of described resonance circuit, the other end ground connection of described power device; Drive circuit, one end of described drive circuit is connected with the control end of described power device, and the other end of described drive circuit is connected with described control circuit.
Wherein, described power device can be IGBT.
In addition, the utility model also proposed a kind of electric cooking pot, and it comprises the controller for heat sink of above-mentioned electric cooking pot.
This electric cooking pot can adjust the rotating speed of blower fan to realize the object of rationally heat radiation in real time according to its operating temperature, thus can reliable and stablely run.
Wherein, described electric cooking pot can be electromagnetic oven, electric pressure cooking saucepan or electric cooker.
The aspect that the utility model is additional and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
The utility model above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the circuit topology figure of a kind of stepless speed changing heat radiation electromagnetic oven in correlation technique;
Fig. 2 be in correlation technique a kind of BUCK of employing circuit characteristic to carry out the schematic diagram of the draught fan control circuit of speed governing to blower fan;
Fig. 3 is that in correlation technique, another kind adopts BUCK circuit characteristic to carry out the schematic diagram of the draught fan control circuit of speed governing to blower fan;
Fig. 4 is the circuit diagram of the controller for heat sink of electric cooking pot according to the utility model embodiment; And
Fig. 5 is the circuit diagram of the electromagnetic oven according to the utility model embodiment.
Detailed description of the invention
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it " on " structure can comprise the embodiment that the first and second features are formed as directly contact, also can comprise other feature and be formed in embodiment between the first and second features, such first and second features may not be direct contacts.
In description of the present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Describe the controller for heat sink of the electric cooking pot proposed according to the utility model embodiment with reference to the accompanying drawings and there is the electric cooking pot of this controller for heat sink.
Fig. 4 is the circuit diagram of the controller for heat sink of electric cooking pot according to the utility model embodiment.As shown in Figure 4, the controller for heat sink of this electric cooking pot comprises: rectification circuit 100, cooling fan circuit 200, temperature sensing circuit 300 and control circuit 400.
Wherein, rectification circuit 100 for the alternating current of input is converted to direct current, the rectifier bridge that such as can be made up of four diodes, and rectification circuit 100 comprises the first output OUT1 and the second output OUT2, the second output OUT2 ground connection.Cooling fan circuit 200 comprises energy storage inductor L1, switching tube Q1, diode D1 and filter capacitor C0, one end of energy storage inductor L1 is connected with the negative pole end of filter capacitor C0 respectively with the first output OUT1, as the cold end V-of blower fan FAN1 and the electronegative potential output of fan power, the other end of energy storage inductor L1 is connected with the anode of diode D1 respectively with one end of switching tube Q1, the other end ground connection of switching tube Q1, the negative electrode of diode D1 is connected with the positive terminal of filter capacitor C0, as the hot end V+ of blower fan FAN1 and the high-potential output end of fan power, the positive terminal of filter capacitor C0 and negative pole end are parallel with blower fan FAN1.
Temperature sensing circuit 300 for detecting the operating temperature of described electric cooking pot, such as, detects the temperature of the crucial heater members of electric cooking pot internal temperature or electric cooking pot.As shown in Figure 5, temperature sensing circuit 300 comprises the first resistance R1 and the first temperature sensor RT1, wherein, one end of first resistance R1 is connected with the power supply VCC preset, the other end of the first resistance R2 is connected with the first temperature detection end of control circuit 400 such as control circuit, one end of first temperature sensor RT1 is connected with the other end of the first resistance R1 and the first temperature detection end of control circuit respectively, the other end ground connection of the first temperature sensor RT1.And, temperature sensing circuit 300 also can comprise the second resistance R2 and the second temperature sensor RT2, one end of second resistance R2 is connected with the power supply VCC preset, the other end of the second resistance R2 is connected with the second temperature detection end of control circuit 400 such as control circuit, one end of second temperature sensor RT2 is connected with the other end of the second resistance R2 and the second temperature detection end of control circuit respectively, the other end ground connection of the second temperature sensor RT2.Wherein, first temperature sensor RT1 can be used for detecting the internal temperature of electric cooking pot, and the temperature detected is sent to control circuit by the first temperature detection end of control circuit, second temperature sensor RT2 can be used for the temperature of the crucial heater members detecting electric cooking pot, and the temperature detected is sent to control circuit by the second temperature detection end of control circuit.
As shown in Fig. 4 or Fig. 5, control circuit 400 is connected with temperature sensing circuit 300 with the control end of switching tube Q1 respectively, and control circuit 400 controls according to the operating temperature switch tube Q1 of the described electric cooking pot that temperature sensing circuit 300 detects.
According to an embodiment of the present utility model, as shown in Fig. 4 or Fig. 5, switching tube Q1 can be triode, wherein, the base stage of triode Q1 is connected with the PWM2 output of control circuit 400 such as control circuit, the colelctor electrode of triode Q1 is connected with the other end of energy storage inductor L1 respectively with the anode of diode D1, the grounded emitter of triode Q1.
Further, as shown in Figure 5, between the input and the alternating current of input of rectification circuit 100, anti-jamming circuit 500 is also connected with.Particularly, anti-jamming circuit 500 comprises: fuse FUSE1, variable resistor R11 and the first electric capacity C1.One end of fuse FUSE1 is connected with the first end of the alternating current of described input such as live wire L, the other end of fuse FUSE1 is connected with the first input end IN1 of rectification circuit 100, one end of variable resistor R11 is connected with the other end of fuse FUSE1, the other end of variable resistor R11 is connected with the second end such as zero line N of the alternating current of described input, second end of the alternating current of described input is connected with the second input IN2 of rectification circuit 100, and the first electric capacity C1 is connected in parallel on the two ends of variable resistor R11.
According to an embodiment of the present utility model, when described electric cooking pot is Electromagnetic Heating cooking pot such as electromagnetic oven, as shown in Figure 5, described Electromagnetic Heating cooking pot such as electromagnetic oven comprises: filter circuit 600, resonance circuit 700, power device 800 and drive circuit 900.
Wherein, one end of filter circuit 600 is connected with the first output OUT1 of rectification circuit 100, and the other end of filter circuit 600 is connected with the second output OUT2 of rectification circuit 100, and filter circuit 600 comprises electric capacity C31 and the inductance L 31 of series connection.One end of resonance circuit 700 is connected with the output of filter circuit 600, and resonance circuit 700 comprises inductance L 41 in parallel and electric capacity C41.One end of power device 800 is connected with the other end of resonance circuit 700, the other end ground connection of power device 800, and power device 800 can be IGBT.One end of drive circuit 900 is extremely connected with the G of the control end such as IGBT of power device 800, and the other end of drive circuit 900 is connected with the PWM1 output of control circuit 400 such as control circuit.
In the present embodiment, when electromagnetic oven normally works, control circuit 400 detects the temperature rise situation of the crucial heater members of electromagnetic oven according to temperature sensing circuit 300, switching frequency or the dutycycle that PWM2 signal controls triode Q1 is exported by PWM2 output, when triode Q1 conducting, energy storage inductor L1 starts the Δ V that charges, and diode D1 ends, when triode Q1 ends, diode D1 conducting is charged to the positive terminal of filter capacitor C0, the original state of such blower fan FAN1 is that both end voltage is (V-), after one-period, the high potential of blower fan is (V+)=(V-)+Δ V, so at this moment the operating voltage at blower fan two ends is Δ V, the frequency or dutycycle that triode Q1 opens and close is changed by the frequency or dutycycle changing PWM2 signal, thus change the operating voltage Δ V at blower fan two ends, make Δ V can from zero to blower fan rated voltage stepless change, so just can change rotating speed and the air quantity of blower fan, thus change the radiating state of electromagnetic oven inside, realize blower fan stepless speed regulation to reach the desirable radiating effect of electromagnetic oven, therefore, the controller for heat sink of the utility model embodiment can change according to the temperature rise of electromagnetic oven internal temperature or crucial heater members the speed of walking around controlling blower fan, embody intelligentized design, while can reducing noise, environmental protection is energy-conservation again, and only need a switching tube in cooling fan circuit, reduce cost.Wherein, due to blower fan respectively with control circuit, IGBT, rectification circuit not altogether, be all isolation circuit; so blower fan FAN1 is because of fault when short circuit; can not cause other fault, electromagnetic oven can be protected when IGBT excess temperature, greatly improves the reliability of whole circuit.
Therefore; the controller for heat sink of the utility model embodiment can control blower fan work automatically according to the temperature rise situation of heater members crucial in electric cooking pot; reach rational radiating effect; and when blower fan breaks down or temperature rise slope hurriedly rises; make electric cooking pot effectively to protect hardware not damage, realize the high reliability of electric cooking pot.Work in low speed state because electric cooking pot can control blower fan when low-temperature-rise, greatly reduce noise, and energy-conserving and environment-protective.
According to the controller for heat sink of the electric cooking pot of the utility model embodiment, the operating temperature of electric cooking pot is detected in real time by temperature sensing circuit, control circuit carries out according to the operating temperature switch tube of electric cooking pot the rotating speed controlling blower fan, reach the object that the rotating speed that adjusts blower fan in real time according to the operating temperature of electric cooking pot rationally dispels the heat to realize electric cooking pot, and the circuit structure of this controller for heat sink is simple, can not only reduce costs, the reliability of circuit can also be improved, ensure the reliable and stable operation of electric cooking pot.Therefore, the controller for heat sink of the electric cooking pot of the utility model embodiment can not only reduce the difficulty of electric cooking pot heat radiation, and substantially increases the reliability of product.
In addition, the utility model embodiment also proposed a kind of electric cooking pot, and it comprises the controller for heat sink of above-mentioned electric cooking pot.
According to embodiments more of the present utility model, described electric cooking pot can be electromagnetic oven, electric pressure cooking saucepan or electric cooker.
The electric cooking pot of the utility model embodiment can adjust the rotating speed of blower fan to realize the object of rationally heat radiation in real time according to its operating temperature, thus can reliable and stablely run.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and spirit, scope of the present utility model is by claims and equivalency thereof.
Claims (10)
1. a controller for heat sink for electric cooking pot, is characterized in that, comprising:
The alternating current of input is converted to galvanic rectification circuit, and described rectification circuit comprises the first output and the second output, described second output head grounding;
Cooling fan circuit, described cooling fan circuit comprises energy storage inductor, switching tube, diode and filter capacitor, one end of described energy storage inductor is connected with the negative pole end of described filter capacitor respectively with described first output, the other end of described energy storage inductor is connected with the anode of described diode respectively with one end of described switching tube, the other end ground connection of described switching tube, the negative electrode of described diode is connected with the positive terminal of described filter capacitor, and positive terminal and the negative pole end of described filter capacitor are parallel with blower fan;
Detect the temperature sensing circuit of the operating temperature of described electric cooking pot; With
Control circuit, described control circuit is connected with described temperature sensing circuit with the control end of described switching tube respectively, and described control circuit controls described switching tube according to the operating temperature of the described electric cooking pot that described temperature sensing circuit detects.
2. the controller for heat sink of electric cooking pot as claimed in claim 1, it is characterized in that, described switching tube is triode, the base stage of described triode is connected with described control circuit, the colelctor electrode of described triode is connected with the other end of described energy storage inductor respectively with the anode of described diode, the grounded emitter of described triode.
3. the controller for heat sink of electric cooking pot as claimed in claim 1, is characterized in that, described temperature sensing circuit comprises:
First resistance, one end of described first resistance is connected with the power supply preset;
First temperature sensor, one end of described first temperature sensor is connected with the other end of described first resistance and described control circuit respectively, the other end ground connection of described first temperature sensor.
4. the controller for heat sink of electric cooking pot as claimed in claim 3, is characterized in that, described temperature sensing circuit also comprises:
Second resistance, one end of described second resistance is connected with described default power supply;
Second temperature sensor, one end of described second temperature sensor is connected with the other end of described second resistance and described control circuit respectively, the other end ground connection of described second temperature sensor.
5. the controller for heat sink of electric cooking pot as claimed in claim 1, is characterized in that, between the input and the alternating current of described input of described rectification circuit, be also connected with anti-jamming circuit.
6. the controller for heat sink of electric cooking pot as claimed in claim 5, is characterized in that, described anti-jamming circuit comprises:
Fuse, one end of described fuse is connected with the first end of the alternating current of described input, and the other end of described fuse is connected with the first input end of described rectification circuit;
Variable resistor, described variable-resistance one end is connected with the other end of described fuse, and the described variable-resistance other end is connected with the second end of the alternating current of described input, and the second end of the alternating current of described input is connected with the second input of described rectification circuit;
First electric capacity, described first Capacitance parallel connection is at described variable-resistance two ends.
7. the controller for heat sink of the electric cooking pot according to any one of claim 1-6, is characterized in that, when described electric cooking pot is Electromagnetic Heating cooking pot, described Electromagnetic Heating cooking pot comprises:
Filter circuit, one end of described filter circuit is connected with the first output of described rectification circuit, and the other end of described filter circuit is connected with the second output of described rectification circuit;
Resonance circuit, one end of described resonance circuit is connected with the output of described filter circuit;
Power device, one end of described power device is connected with the other end of described resonance circuit, the other end ground connection of described power device;
Drive circuit, one end of described drive circuit is connected with the control end of described power device, and the other end of described drive circuit is connected with described control circuit.
8. the controller for heat sink of electric cooking pot as claimed in claim 7, is characterized in that, described power device is IGBT.
9. an electric cooking pot, is characterized in that, comprises the controller for heat sink of the electric cooking pot according to any one of claim 1-8.
10. electric cooking pot as claimed in claim 9, is characterized in that, described electric cooking pot is electromagnetic oven, electric pressure cooking saucepan or electric cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407369.XU CN204141641U (en) | 2014-07-22 | 2014-07-22 | Electricity cooking pot and controller for heat sink thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407369.XU CN204141641U (en) | 2014-07-22 | 2014-07-22 | Electricity cooking pot and controller for heat sink thereof |
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| Publication Number | Publication Date |
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| CN204141641U true CN204141641U (en) | 2015-02-04 |
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| CN201420407369.XU Active CN204141641U (en) | 2014-07-22 | 2014-07-22 | Electricity cooking pot and controller for heat sink thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104970689A (en) * | 2015-07-31 | 2015-10-14 | 苏州蓝王机床工具科技有限公司 | Power self-learning electric rice cooker |
| CN109282330A (en) * | 2018-11-09 | 2019-01-29 | 杭州老板电器股份有限公司 | Infrared measurement of temperature electromagnetic stove |
-
2014
- 2014-07-22 CN CN201420407369.XU patent/CN204141641U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104970689A (en) * | 2015-07-31 | 2015-10-14 | 苏州蓝王机床工具科技有限公司 | Power self-learning electric rice cooker |
| CN109282330A (en) * | 2018-11-09 | 2019-01-29 | 杭州老板电器股份有限公司 | Infrared measurement of temperature electromagnetic stove |
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