CN203164376U - Switch detection circuit for pressure cooking appliance - Google Patents
Switch detection circuit for pressure cooking appliance Download PDFInfo
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- CN203164376U CN203164376U CN 201320143579 CN201320143579U CN203164376U CN 203164376 U CN203164376 U CN 203164376U CN 201320143579 CN201320143579 CN 201320143579 CN 201320143579 U CN201320143579 U CN 201320143579U CN 203164376 U CN203164376 U CN 203164376U
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Abstract
The utility model discloses a switch detection circuit for a pressure cooking appliance. The pressure cooling appliance comprises a load control module and a heating module. The switch detection circuit comprises a pressure switch, a switch detection module and a controller, wherein the pressure switch is connected with the load control module and the heating module in series, and the pressure switch remains to be closed when the heating module starts to work and switches off when the pressure in the pressure cooking appliance reaches a preset threshold value; the switch detection module generates detection signals according to on-off of the pressure switch; and the controller is connected with the switch detection module and the load control module, judges the state of the pressure switch according to the detection signals, and generates a control signal so as to control the load control module. The switch detection circuit provided by the utility model for the pressure cooking appliance connects the pressure switch to the circuit in series, detects the state of the pressure switch in real time, overcomes detects of the prior art, improves the safety and the reliability of products, and bring convenience for the life of people.
Description
Technical field
The utility model relates to the living electric apparatus field, particularly a kind of switch testing circuit for pressure cooking appliance.
Background technology
The pressure switch of existing micro computer pressure cooking appliance, mainly be connected in the low-voltage part, microcontroller is judged the state of switch by the detector switch signal, and come opening and closure of pilot relay according to detected on off state, thereby be switched on or switched off being communicated with of power supply and heater members, realize the control to heater members.
The pressure switch of existing a kind of pressure cooking appliance is connected in parallel in the circuit, pressure switch is being communicated with of deenergization and heater members directly, need microcontroller detected pressures switch state signal, and the opening and closure of pilot relay, when pressure switch signal deteching circuit or control relay circuit or microcontroller occur when unusual, effectively deenergization and heater members is communicated with, namely can not effectively cut off the heating function of heater members, may bring the risk of product pressure release even flip.
In the prior art, there is a kind of pressure switch of pressure cooking appliance to be connected with relay coil, when pressure switch disconnects, disconnects the relay coil electric current, relay switch is disconnected.But, when adhesion appears in relay, equally effectively being communicated with of deenergization and heater members, namely can not effectively cut off the heating function of heater members, may bring the risk of product pressure release even flip, bring certain potential safety hazard to the user.
The utility model content
The purpose of this utility model is intended to solve the problems of the technologies described above at least.
For this reason, the purpose of this utility model is to propose a kind of switch testing circuit for pressure cooking appliance, and this switch testing circuit is connected on pressure switch in the circuit, has overcome the deficiencies in the prior art, has improved security of products and reliability.
For reaching above-mentioned purpose, the utility model proposes a kind of switch testing circuit for pressure cooking appliance, described pressure cooking appliance comprises load control module and heating module, described switch testing circuit comprises: pressure switch, described pressure switch and described load control module, described heating module are connected in series, described pressure switch remains closed when described heating module is started working, and the pressure in described pressure cooking appliance disconnects when reaching predetermined threshold value; Generate the switch detection module of detection signal according to the closed and disconnected of described pressure switch; Controller, described controller link to each other with described load control module with described switch detection module respectively, and described controller is judged the state of described pressure switch according to described detection signal, and generate control signal so that described load control module is controlled.
According to the switch testing circuit that is used for pressure cooking appliance that the utility model proposes, pressure switch is connected with heating module, and the state of real-time detected pressures switch, when disconnecting, pressure switch can effectively cut off the heating function of heating module, the deficiencies in the prior art have been overcome, improved security of products and reliability, brought convenience for people's life.
Preferably, described switch detection module links to each other with node between described pressure switch and the described heating module.
Preferably, described switch detection module links to each other with node between described heating module and the described load control module.
Preferably, described switch detection module links to each other with node between described pressure switch and the described load control module.
Preferably, described switch detection module further comprises: first diode; First resistance, an end of described first resistance links to each other with the negative electrode of described first diode, and the other end of described first resistance links to each other with described controller; Second resistance and first electrochemical capacitor in parallel, one end of described second resistance links to each other with the other end of described first resistance respectively with the positive terminal of described first electrochemical capacitor, and the negative pole end of the other end of described second resistance and described first electrochemical capacitor is ground connection respectively.
Preferably, described switch detection module further comprises: the 3rd resistance; Second diode, the negative electrode of described second diode links to each other with an end of described the 3rd resistance; The 4th resistance and first electric capacity of series connection, one end of described the 4th resistance links to each other with an end of described first electric capacity, the other end of described the 4th resistance links to each other with reference power source, the other end ground connection of described first electric capacity, the node between described the 4th resistance and first electric capacity links to each other with the anode of described second diode; First triode, the base stage of described first triode links to each other with node between described the 4th resistance and first electric capacity, and the emitter of described first triode links to each other with described reference power source; The 5th resistance, an end of described the 5th resistance links to each other with the collector of described first triode, the other end ground connection of described the 5th resistance; The 6th resistance, an end of described the 6th resistance links to each other with the collector of described first triode, and the other end of described the 6th resistance links to each other with described controller.
Preferably, described switch detection module further comprises: current transformer; The 7th resistance and second electric capacity in parallel, the two ends of described the 7th resistance and second electric capacity link to each other with the output terminal of described current transformer; Rectification unit, described rectification unit links to each other with the two ends of described the 7th resistance and second electric capacity; The 8th resistance and second electrochemical capacitor in parallel, one end of described the 8th resistance links to each other with described controller with the output terminal of described rectification unit respectively with the positive terminal of described second electrochemical capacitor, and the negative pole end of the other end of described the 8th resistance and described second electrochemical capacitor is ground connection respectively.
Preferably, described heating module can be heat-generating disc.
The aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or the additional aspect of the utility model and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the block diagram according to the switch testing circuit that is used for pressure cooking appliance of an embodiment of the utility model;
Fig. 2 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of a specific embodiment of the utility model;
Fig. 3 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of another specific embodiment of the utility model;
Fig. 4 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of another specific embodiment of the utility model;
Fig. 5 is the block diagram according to the switch testing circuit that is used for pressure cooking appliance of another embodiment of the utility model;
Fig. 6 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of a specific embodiment of the utility model;
Fig. 7 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of another specific embodiment of the utility model;
Fig. 8 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of another specific embodiment of the utility model;
Fig. 9 is the block diagram according to the switch testing circuit that is used for pressure cooking appliance of another embodiment of the utility model;
Figure 10 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of a specific embodiment of the utility model;
Figure 11 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of another specific embodiment of the utility model; And
Figure 12 is the synoptic diagram according to the switch testing circuit that is used for pressure cooking appliance of another specific embodiment of the utility model.
Reference numeral:
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter parts and the setting to specific examples is described.Certainly, they only are example, and purpose does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself not indicate the relation between the various embodiment that discuss of institute and/or the setting.In addition, various specific technology and examples of material that the utility model provides, but those of ordinary skills can recognize the use of applicability and/or the other materials of other technologies.In addition, first feature described below second feature it " on " structure can comprise that first and second features form the embodiment of direct contact, can comprise that also additional features is formed on the embodiment between first and second features, such first and second features may not be direct contacts.
In description of the present utility model, need to prove, unless otherwise prescribed and limit, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can link to each other indirectly by intermediary, for the ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be.
With reference to following description and accompanying drawing, with these and other aspects of clear embodiment of the present utility model.In these descriptions and accompanying drawing, some specific implementations among the embodiment of the present utility model are specifically disclosed, represent to implement some modes of the principle of embodiment of the present utility model, but should be appreciated that the scope of embodiment of the present utility model is not limited.On the contrary, embodiment of the present utility model comprises spirit and interior all changes, modification and the equivalent of intension scope that falls into institute's additional claims.
With reference to the accompanying drawings the switch testing circuit that is used for pressure cooking appliance that the utility model proposes is described.
Fig. 1 is the block diagram according to the switch testing circuit that is used for pressure cooking appliance of an embodiment proposition of the utility model.Wherein, pressure cooking appliance comprises load control module 100 and heating module 200.In embodiment of the present utility model, heating module 200 can be heat-generating disc.
As shown in Figure 1, the switch testing circuit that is used for pressure cooking appliance of the utility model embodiment proposition comprises pressure switch 110, switch detection module 120 and controller 130.
Wherein, as shown in Figure 1, pressure switch 110 is connected in series with load control module 100, heating module 200, and pressure switch 110 remains closed when heating module 200 is started working, and the pressure in pressure cooking appliance disconnects when reaching predetermined threshold value.Switch detection module 120 generates detection signal according to the closed and disconnected of pressure switch 110.Controller 130 links to each other with load control module 100 with switch detection module 120 respectively, and controller 130 is judged the state of pressure switch 110 according to detection signal, and generates control signal so that load control module 100 is controlled.Wherein, controller 130 can be MCU(Micro Control Unit, micro-control unit).
Need to prove, the detection signal difference that switch detection module 120 generates according to the closed and disconnected of pressure switch 110, therefore, this detection signal can but be not limited to high level signal, low level signal, or square-wave signal.
In an embodiment of the present utility model, as shown in Figure 1, switch detection module 120 links to each other with node between pressure switch 110 and the heating module 200.
Further, in a specific embodiment of the present utility model, as shown in Figure 2, switch detection module 120 further comprises: second resistance R 2 and the first electrochemical capacitor EC1 of the first diode D1, first resistance R 1, parallel connection.The anode of the first diode D1 links to each other with node between pressure switch 110 and the heating module 200.One end of first resistance R 1 links to each other with the negative electrode of the first diode D1, and the other end of first resistance R 1 links to each other with controller 130.One end of second resistance R 2 links to each other with the other end of first resistance R 1 respectively with the positive terminal of the first electrochemical capacitor EC1, and the negative pole end of the other end of second resistance R 2 and the first electrochemical capacitor EC1 is ground connection respectively.
Particularly, as shown in Figure 2, the principle of work of above-mentioned switch testing circuit for pressure cooking appliance is: when the heating module 200 of pressure cooking appliance is started working, pressure switch 110 is kept closed, AC power is that civil power passes through first resistance R 1 and second resistance R, 2 dividing potential drops, and the first electrochemical capacitor EC1 charged, at this moment, the detection signal that switch detection module 120 generates is a continual and steady voltage signal, and MCU judges that according to detection signal pressure switch 110 is in closure state; When pressure switch 110 disconnects the pressure of namely saying in the pressure cooking appliance and reaches predetermined threshold value, the first electrochemical capacitor EC1 discharges, this moment, the detection signal of switch detection module 120 generations was a continual and steady low level signal, MCU judges that according to detection signal pressure switch 110 is in off-state, and the generation control signal is controlled load control module 100.
That is to say that switch detection module 120 generates different detection signals during according to pressure switch 110 closed and disconnecteds, MCU is by the difference of detection signal state, thereby judges the state of pressure switch 110, and makes corresponding processing.
In another specific embodiment of the present utility model, preferably, as shown in Figure 3, switch detection module 120 further comprises: the 4th resistance R 4 of the 3rd resistance R 3, the second diode D2, series connection and first capacitor C 1, the first triode Q1, the 5th resistance R 5, the 6th resistance R 6.The 3rd resistance R 3 links to each other with node between pressure switch 110 and the heating module 200.The negative electrode of the second diode D2 links to each other with an end of the 3rd resistance R 3.One end of the 4th resistance R 4 links to each other with an end of first capacitor C 1, and the other end of the 4th resistance R 4 links to each other with reference power source, the other end ground connection of first capacitor C 1, and the node between the 4th resistance R 4 and first capacitor C 1 links to each other with the anode of the second diode D2.The base stage of the first triode Q1 links to each other with node between the 4th resistance R 4 and first capacitor C 1, and the emitter of the first triode Q1 links to each other with reference power source.One end of the 5th resistance R 5 links to each other with the collector of the first triode Q1, the other end ground connection of the 5th resistance R 5.One end of the 6th resistance R 6 links to each other with the collector of the first triode Q1, and the other end of the 6th resistance R 6 links to each other with controller 130.In embodiment of the present utility model, reference power source can be+5V.
In another specific embodiment of the present utility model, preferably, as shown in Figure 4, switch detection module 120 further comprises: the 8th resistance R 8 and the second electrochemical capacitor EC2 of the 7th resistance R 7 of current transformer 10, parallel connection and second capacitor C 2, rectification unit 20, parallel connection.To be primary coil link to each other with node between pressure switch 110 and the heating module 200 input end of current transformer 10.The two ends of the 7th resistance R 7 and second capacitor C 2 are that secondary coil links to each other with the output terminal of current transformer 10.Rectification unit 20 links to each other with the two ends of the 7th resistance R 7 and second capacitor C 2.One end of the 8th resistance R 8 links to each other with controller 130 with the output terminal of rectification unit 20 respectively with the positive terminal of the second electrochemical capacitor EC2, and the negative pole end of the other end of the 8th resistance R 8 and the second electrochemical capacitor EC2 is ground connection respectively.
Among another embodiment of the present utility model, as shown in Figure 5, switch detection module 120 links to each other with node between heating module 200 and the load control module 100.
Further, in a specific embodiment of the present utility model, as shown in Figure 6, switch detection module 120 further comprises: second resistance R 2 and the first electrochemical capacitor EC1 of the first diode D1, first resistance R 1, parallel connection.The anode of the first diode D1 links to each other with node between heating module 200 and the load control module 100.One end of first resistance R 1 links to each other with the negative electrode of the first diode D1, and the other end of first resistance R 1 links to each other with controller 130.One end of second resistance R 2 links to each other with the other end of first resistance R 1 respectively with the positive terminal of the first electrochemical capacitor EC1, and the negative pole end of the other end of second resistance R 2 and the first electrochemical capacitor EC1 is ground connection respectively.
In another specific embodiment of the present utility model, preferably, as shown in Figure 7, switch detection module 120 further comprises: the 4th resistance R 4 of the 3rd resistance R 3, the second diode D2, series connection and first capacitor C 1, the first triode Q1, the 5th resistance R 5, the 6th resistance R 6.The 3rd resistance R 3 links to each other with node between heating module 200 and the load control module 100.The negative electrode of the second diode D2 links to each other with an end of the 3rd resistance R 3.One end of the 4th resistance R 4 links to each other with an end of first capacitor C 1, and the other end of the 4th resistance R 4 links to each other with reference power source, the other end ground connection of first capacitor C 1, and the node between the 4th resistance R 4 and first capacitor C 1 links to each other with the anode of the second diode D2.The base stage of the first triode Q1 links to each other with node between the 4th resistance R 4 and first capacitor C 1, and the emitter of the first triode Q1 links to each other with reference power source.One end of the 5th resistance R 5 links to each other with the collector of the first triode Q1, the other end ground connection of the 5th resistance R 5.One end of the 6th resistance R 6 links to each other with the collector of the first triode Q1, and the other end of the 6th resistance R 6 links to each other with controller 130.In embodiment of the present utility model, reference power source can be+5V.
Particularly, as shown in Figure 7, the principle of work of above-mentioned switch testing circuit for pressure cooking appliance is: when the heating module 200 of pressure cooking appliance is started working, pressure switch 110 is kept closed, when AC power is civil power by near zero crossing the time, the first triode Q1 conducting, switch detection module 120 output high level signals, when civil power during away from zero crossing, the first triode Q1 ends, and so switch detection module 120 output low level signals are in the whole process, the detection signal that switch detection module 120 generates is the square-wave signal that a high-low level alternately occurs, and MCU judges that according to detection signal pressure switch 110 is in closure state; When pressure switch 110 disconnects the pressure of namely saying in the pressure cooking appliance and reaches predetermined threshold value, the first triode Q1 is in cut-off state, this moment, the detection signal of switch detection module 120 generations was low level signal, MCU judges that according to detection signal pressure switch 110 is in off-state, and the generation control signal is controlled load control module 100.
That is to say that switch detection module 120 generates different detection signals during according to pressure switch 110 closed and disconnecteds, MCU is by the difference of detection signal state, thereby judges the state of pressure switch 110, and makes corresponding processing.
In another specific embodiment of the present utility model, preferably, as shown in Figure 8, switch detection module 120 further comprises: the 8th resistance R 8 and the second electrochemical capacitor EC2 of the 7th resistance R 7 of current transformer 10, parallel connection and second capacitor C 2, rectification unit 20, parallel connection.To be primary coil link to each other with node between heating module 200 and the load control module 100 input end of current transformer 10.The two ends of the 7th resistance R 7 and second capacitor C 2 are that secondary coil links to each other with the output terminal of current transformer 10.Rectification unit 20 links to each other with the two ends of the 7th resistance R 7 and second capacitor C 2.One end of the 8th resistance R 8 links to each other with controller 130 with the output terminal of rectification unit 20 respectively with the positive terminal of the second electrochemical capacitor EC2, and the negative pole end of the other end of the 8th resistance R 8 and the second electrochemical capacitor EC2 is ground connection respectively.
In another embodiment of the present utility model, as shown in Figure 9, switch detection module 120 links to each other with node between pressure switch 110 and the load control module 100.
Further, in a specific embodiment of the present utility model, as shown in figure 10, switch detection module 120 further comprises: second resistance R 2 and the first electrochemical capacitor EC1 of the first diode D1, first resistance R 1, parallel connection.The anode of the first diode D1 links to each other with node between pressure switch 110 and the load control module 100.One end of first resistance R 1 links to each other with the negative electrode of the first diode D1, and the other end of first resistance R 1 links to each other with controller 130.One end of second resistance R 2 links to each other with the other end of first resistance R 1 respectively with the positive terminal of the first electrochemical capacitor EC1, and the negative pole end of the other end of second resistance R 2 and the first electrochemical capacitor EC1 is ground connection respectively.
In another specific embodiment of the present utility model, preferably, as shown in figure 11, switch detection module 120 further comprises: the 4th resistance R 4 of the 3rd resistance R 3, the second diode D2, series connection and first capacitor C 1, the first triode Q1, the 5th resistance R 5, the 6th resistance R 6.The 3rd resistance R 3 links to each other with node between pressure switch 110 and the load control module 100.The negative electrode of the second diode D2 links to each other with an end of the 3rd resistance R 3.One end of the 4th resistance R 4 links to each other with an end of first capacitor C 1, and the other end of the 4th resistance R 4 links to each other with reference power source, the other end ground connection of first capacitor C 1, and the node between the 4th resistance R 4 and first capacitor C 1 links to each other with the anode of the second diode D2.The base stage of the first triode Q1 links to each other with node between the 4th resistance R 4 and first capacitor C 1, and the emitter of the first triode Q1 links to each other with reference power source.One end of the 5th resistance R 5 links to each other with the collector of the first triode Q1, the other end ground connection of the 5th resistance R 5.One end of the 6th resistance R 6 links to each other with the collector of the first triode Q1, and the other end of the 6th resistance R 6 links to each other with controller 130.In embodiment of the present utility model, reference power source can be+5V.
In another specific embodiment of the present utility model, preferably, as shown in figure 12, switch detection module 120 further comprises: the 8th resistance R 8 and the second electrochemical capacitor EC2 of the 7th resistance R 7 of current transformer 10, parallel connection and second capacitor C 2, rectification unit 20, parallel connection.To be primary coil link to each other with node between pressure switch 110 and the load control module 100 input end of current transformer 10.The two ends of the 7th resistance R 7 and second capacitor C 2 are that secondary coil links to each other with the output terminal of current transformer 10.Rectification unit 20 links to each other with the two ends of the 7th resistance R 7 and second capacitor C 2.One end of the 8th resistance R 8 links to each other with controller 130 with the output terminal of rectification unit 20 respectively with the positive terminal of the second electrochemical capacitor EC2, and the negative pole end of the other end of the 8th resistance R 8 and the second electrochemical capacitor EC2 is ground connection respectively.
Particularly, as shown in figure 12, the principle of work of above-mentioned switch testing circuit for pressure cooking appliance is: when the heating module 200 of pressure cooking appliance is started working, pressure switch 110 is kept closed, because having electric current to flow through in the current transformer 10, by i.e. the 8th resistance R 8 of current transformer 10, rectification unit 20 and bleeder circuit, and the second electrochemical capacitor EC2 charged, the detection signal that switch detection module 120 generates is a continual and steady voltage signal, and MCU judges that according to detection signal pressure switch 110 is in closure state; When pressure switch 110 disconnects the pressure of namely saying in the pressure cooking appliance and reaches predetermined threshold value, no current flows through in the current transformer 10, so the detection signal that switch detection module 120 generates is a continual and steady low level signal, MCU judges that according to detection signal pressure switch 110 is in off-state, and the generation control signal is controlled load control module 100.
That is to say that switch detection module 120 generates different detection signals during according to pressure switch 110 closed and disconnecteds, MCU is by the difference of detection signal state, thereby judges the state of pressure switch 110, and makes corresponding processing.
According to the switch testing circuit that is used for pressure cooking appliance that the utility model proposes, pressure switch is connected with heating module, and the state of real-time detected pressures switch, when disconnecting, pressure switch can effectively cut off the heating function of heating module, the deficiencies in the prior art have been overcome, improved security of products and reliability, brought convenience for people's life.
In the description of this instructions, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present utility model or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment that scope of the present utility model is by claims and be equal to and limit.
Claims (8)
1. a switch testing circuit that is used for pressure cooking appliance is characterized in that described pressure cooking appliance comprises load control module and heating module, and described switch testing circuit comprises:
Pressure switch, described pressure switch and described load control module, described heating module are connected in series, and described pressure switch remains closed when described heating module is started working, and the pressure in described pressure cooking appliance disconnects when reaching predetermined threshold value;
Generate the switch detection module of detection signal according to the closed and disconnected of described pressure switch;
Controller, described controller link to each other with described load control module with described switch detection module respectively, and described controller is judged the state of described pressure switch according to described detection signal, and generate control signal so that described load control module is controlled.
2. the switch testing circuit for pressure cooking appliance as claimed in claim 1 is characterized in that, described switch detection module links to each other with node between described pressure switch and the described heating module.
3. the switch testing circuit for pressure cooking appliance as claimed in claim 1 is characterized in that, described switch detection module links to each other with node between described heating module and the described load control module.
4. the switch testing circuit for pressure cooking appliance as claimed in claim 1 is characterized in that, described switch detection module links to each other with node between described pressure switch and the described load control module.
5. as each described switch testing circuit for pressure cooking appliance of claim 2-4, it is characterized in that described switch detection module further comprises:
First diode;
First resistance, an end of described first resistance links to each other with the negative electrode of described first diode, and the other end of described first resistance links to each other with described controller;
Second resistance and first electrochemical capacitor in parallel, one end of described second resistance links to each other with the other end of described first resistance respectively with the positive terminal of described first electrochemical capacitor, and the negative pole end of the other end of described second resistance and described first electrochemical capacitor is ground connection respectively.
6. as each described switch testing circuit for pressure cooking appliance of claim 2-4, it is characterized in that described switch detection module further comprises:
The 3rd resistance;
Second diode, the negative electrode of described second diode links to each other with an end of described the 3rd resistance;
The 4th resistance and first electric capacity of series connection, one end of described the 4th resistance links to each other with an end of described first electric capacity, the other end of described the 4th resistance links to each other with reference power source, the other end ground connection of described first electric capacity, the node between described the 4th resistance and first electric capacity links to each other with the anode of described second diode;
First triode, the base stage of described first triode links to each other with node between described the 4th resistance and first electric capacity, and the emitter of described first triode links to each other with described reference power source;
The 5th resistance, an end of described the 5th resistance links to each other with the collector of described first triode, the other end ground connection of described the 5th resistance;
The 6th resistance, an end of described the 6th resistance links to each other with the collector of described first triode, and the other end of described the 6th resistance links to each other with described controller.
7. as each described switch testing circuit for pressure cooking appliance of claim 2-4, it is characterized in that described switch detection module further comprises:
Current transformer;
The 7th resistance and second electric capacity in parallel, the two ends of described the 7th resistance and second electric capacity link to each other with the output terminal of described current transformer;
Rectification unit, described rectification unit links to each other with the two ends of described the 7th resistance and second electric capacity;
The 8th resistance and second electrochemical capacitor in parallel, one end of described the 8th resistance links to each other with described controller with the output terminal of described rectification unit respectively with the positive terminal of described second electrochemical capacitor, and the negative pole end of the other end of described the 8th resistance and described second electrochemical capacitor is ground connection respectively.
8. the switch testing circuit for pressure cooking appliance as claimed in claim 1 is characterized in that, described heating module is heat-generating disc.
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| CN 201320143579 CN203164376U (en) | 2013-03-26 | 2013-03-26 | Switch detection circuit for pressure cooking appliance |
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| CN 201320143579 CN203164376U (en) | 2013-03-26 | 2013-03-26 | Switch detection circuit for pressure cooking appliance |
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| CN203164376U true CN203164376U (en) | 2013-08-28 |
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| CN103675670A (en) * | 2013-12-18 | 2014-03-26 | 美的集团股份有限公司 | Pressure switch state detection circuit, circuit board, and electric heating product with circuit board |
| CN103675672A (en) * | 2013-12-18 | 2014-03-26 | 美的集团股份有限公司 | Pressure switch state detection circuit, circuit board, and electric heating product with circuit board |
| CN103698576A (en) * | 2013-12-18 | 2014-04-02 | 美的集团股份有限公司 | Voltage detection circuit, circuit board provided with same, heating equipment and electric heating product |
| CN105703772A (en) * | 2014-11-28 | 2016-06-22 | 佛山市顺德区美的电热电器制造有限公司 | AD detection circuit and electric cooker with AD detection circuit |
| CN111000461A (en) * | 2019-11-29 | 2020-04-14 | 九阳股份有限公司 | Safety protection control method for food processing machine |
| CN114766905A (en) * | 2022-03-18 | 2022-07-22 | 松下家电(中国)有限公司 | Control method of pressure cooking appliance |
| CN114766905B (en) * | 2022-03-18 | 2024-04-19 | 松下家电(中国)有限公司 | Control method of pressure cooking appliance |
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2013
- 2013-03-26 CN CN 201320143579 patent/CN203164376U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675670A (en) * | 2013-12-18 | 2014-03-26 | 美的集团股份有限公司 | Pressure switch state detection circuit, circuit board, and electric heating product with circuit board |
| CN103675672A (en) * | 2013-12-18 | 2014-03-26 | 美的集团股份有限公司 | Pressure switch state detection circuit, circuit board, and electric heating product with circuit board |
| CN103698576A (en) * | 2013-12-18 | 2014-04-02 | 美的集团股份有限公司 | Voltage detection circuit, circuit board provided with same, heating equipment and electric heating product |
| CN103675670B (en) * | 2013-12-18 | 2017-04-12 | 美的集团股份有限公司 | Pressure switch state detection circuit and electric heating product with same |
| CN103675672B (en) * | 2013-12-18 | 2017-09-29 | 美的集团股份有限公司 | Pressure switch state detection circuit and the electric heating products with it |
| CN105703772A (en) * | 2014-11-28 | 2016-06-22 | 佛山市顺德区美的电热电器制造有限公司 | AD detection circuit and electric cooker with AD detection circuit |
| CN105703772B (en) * | 2014-11-28 | 2019-04-26 | 佛山市顺德区美的电热电器制造有限公司 | AD detection circuit and electric cooking pot with it |
| CN111000461A (en) * | 2019-11-29 | 2020-04-14 | 九阳股份有限公司 | Safety protection control method for food processing machine |
| CN111000461B (en) * | 2019-11-29 | 2022-05-03 | 九阳股份有限公司 | Safety protection control method for food processing machine |
| CN114766905A (en) * | 2022-03-18 | 2022-07-22 | 松下家电(中国)有限公司 | Control method of pressure cooking appliance |
| CN114766905B (en) * | 2022-03-18 | 2024-04-19 | 松下家电(中国)有限公司 | Control method of pressure cooking appliance |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20130828 |
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