CN209404436U - Pressure control circuit and cooking utensil - Google Patents
Pressure control circuit and cooking utensil Download PDFInfo
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- CN209404436U CN209404436U CN201822077645.1U CN201822077645U CN209404436U CN 209404436 U CN209404436 U CN 209404436U CN 201822077645 U CN201822077645 U CN 201822077645U CN 209404436 U CN209404436 U CN 209404436U
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- 238000010411 cooking Methods 0.000 title claims abstract description 69
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- 238000010586 diagram Methods 0.000 description 8
- 235000013305 food Nutrition 0.000 description 7
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Abstract
The utility model discloses a pressure control circuit, cooking utensil. Wherein, this pressure control circuit includes: an input device, comprising: an input for generating a pressure adjustment signal; a controller, comprising: the input end of the controller is connected with the output end of the input device, and the controller is used for outputting a pulse modulation signal based on the pressure regulation signal; a drive circuit, comprising: the input end of the driving circuit is connected with the output end of the controller, the output end of the driving circuit is connected with the control end of the electromagnetic valve, and the driving circuit is used for controlling the exhaust pressure of the electromagnetic valve based on the pulse modulation signal; the electromagnetic valve is blocked at an exhaust port of the cooking appliance and is used for being opened under the condition that the pressure of the cooking appliance is greater than or equal to the exhaust pressure. The utility model provides a cooking utensil's the fixed technical problem of exhaust pressure among the prior art.
Description
Technical field
The utility model relates to household appliance technical fields, in particular to a kind of pressure control circuit, cooking apparatus.
Background technique
In the prior art, in order to realize the different pressures at expulsion of cooking apparatus, the counterweight of setting relief valve can be passed through
Difference realizes that still, for a cooking apparatus, pressure at expulsion fixation is unadjustable, and user can not be according to food not
With selecting different pressure.
For the problem that the pressure at expulsion of cooking apparatus in the prior art is fixed, effective solution side is not yet proposed at present
Case.
Utility model content
The utility model embodiment provides a kind of pressure control circuit, cooking apparatus, at least to solve in the prior art
The fixed technical problem of the pressure at expulsion of cooking apparatus.
According to the one aspect of the utility model embodiment, a kind of pressure control circuit is provided, comprising: input unit,
It include: output end, input unit is for generating pressure adjustment signal；Controller, comprising: input terminal and output end, controller
The connection of the output end of input terminal and input unit, controller are used to export pulse-modulated signal based on pressure adjustment signal；Driving
Circuit, comprising: input terminal and output end, the input terminal of driving circuit and the output end of controller connect, the output of driving circuit
End is connect with the control terminal of solenoid valve, and driving circuit is used for the pressure at expulsion based on pulse-modulated signal control solenoid valve；Wherein,
Solenoid valve is plugged in the exhaust outlet of cooking apparatus, and solenoid valve is used to be greater than or equal to the feelings of pressure at expulsion in the pressure of cooking apparatus
It is opened under condition.
In the utility model embodiment, solenoid valve is set in cooking apparatus and blocks exhaust outlet, so that needing to row
When atmospheric pressure is adjusted, pressure adjustment signal can be generated by input unit, corresponding pulse is exported by controller
Modulated signal, and by the voltage of driving circuit control solenoid valve, to control the coil current size of solenoid valve, and then control electricity
The pressure at expulsion of magnet valve realizes and artificially adjusts pressure at expulsion in a certain range, promotes the technical effect of user experience, into
And solves the problems, such as the pressure at expulsion technique for fixing of cooking apparatus in the prior art.
Further, driving circuit includes: inverter cricuit, comprising: first end and second end, the first end of inverter cricuit with
The input terminal of driving circuit connects；Integrating circuit, comprising: first end and second end, the first end and inverter cricuit of integrating circuit
Second end connection；Amplifying circuit, comprising: first end and second end, the first end of amplifying circuit and the second end of integrating circuit
Connection, the second end of amplifying circuit and the output end of driving circuit connect.Pass through setting negater circuit, integrating circuit and amplification electricity
The purpose that the voltage of solenoid valve is adjusted is realized on road, and then achievees the purpose that the pressure at expulsion for adjusting cooking apparatus.
Further, inverter cricuit includes: the first triode, and the base stage of the first triode passes through first resistor and reverse phase electricity
The first end on road connects, and the emitter ground connection of the first triode, the collector of the first triode connects direct current by second resistance
Source, the collector of the first triode and the second end of inverter cricuit connect.Impulse modulation letter is realized by the first triode of setting
Number reverse phase and level conversion, and avoid the electric current of input from excessive causing the one or three pole by setting first resistor and second resistance
Pipe damage further achievees the purpose that the pressure at expulsion for adjusting cooking apparatus.
Further, integrating circuit includes: 3rd resistor, and the first end of 3rd resistor and the first end of integrating circuit connect
It connects, the second end of 3rd resistor and the second end of integrating circuit connect；First capacitor is connected on the second end and ground of 3rd resistor
Between；Second capacitor, is connected between the second end of 3rd resistor and ground.By setting by 3rd resistor, first capacitor and the
The integrating circuit of two capacitors composition realizes the smooth of pulse-modulated signal, further reaches the pressure at expulsion for adjusting cooking apparatus
Purpose.
Further, amplifying circuit includes: the second triode, and the base stage of the second triode and the first end of amplifying circuit connect
It connects, the emitter of the second triode and the second end of amplifying circuit connect, and the collector of the second triode connects DC power supply.Pass through
The amplification that second triode realizes pulse-modulated signal is set, further achievees the purpose that the pressure at expulsion for adjusting cooking apparatus.
Further, the output end of controller includes: the first output end and second output terminal, and solenoid valve includes: the first control
End processed and the second control terminal, wherein the first end of inverter cricuit and the first output end of controller connect, and the second of amplifying circuit
End is connect with the first control terminal of solenoid valve；Driving circuit further include: switching circuit, the first end of switching circuit and controller
Second output terminal connection, the second end of switching circuit and the second control terminal of solenoid valve connect, and switching circuit is used for based on control
The control signal control solenoid valve of device output turns on or off.It is directly connect with controller by the way that switching circuit is arranged, it can be with
Realize that control solenoid valve opens or closes, to realize that having for cooking apparatus is pressed and cooked without pressure.
Further, switching circuit includes: third transistor, and the base stage of third transistor passes through the 4th resistance and switch electricity
The first end on road connects, and the emitter ground connection of third transistor, the collector of third transistor and the second end of switching circuit connect
It connects.It can achieve by setting third transistor and be quickly switched on or off solenoid valve.
Further, solenoid valve includes: the first control terminal and the second control terminal, wherein the second end and electricity of amplifying circuit
First control terminal of magnet valve connects；Driving circuit further include: diode, the anode of diode and the second control terminal of solenoid valve and
Ground connection, the cathode of diode and the first control terminal of solenoid valve connect.By the way that diode is arranged, the reversed electricity of solenoid valve is prevented
Gesture damages driving circuit, and no setting is required switching circuit, reduces conducting wire, and application is more convenient.
Further, input unit includes: at least one key, and key includes: first end and second end, and the first of key
End connects DC power supply by the 5th resistance, and the first end of key and the output end of input unit connect, the second end ground connection of key.
By the way that at least one key is arranged, user's operation button as needed is realized, to be adjusted to exhaust voltage.
Further, in the case where key includes: function selection key, controller includes: memory module, for storing
The corresponding pressure at expulsion of multiple cooking functions；Control module is connect with memory module, for what is chosen based on function selection key
The corresponding pressure at expulsion of cooking function generates pulse-modulated signal.It is corresponding by storing different cooking functions in a storage module
Pressure at expulsion realizes the purpose that different pressures at expulsion are arranged according to different foods.
According to the another aspect of the utility model embodiment, a kind of cooking apparatus is additionally provided, comprising: solenoid valve blocks
In the exhaust outlet of cooking apparatus, for being opened in the case where the pressure of cooking apparatus is greater than or equal to pressure at expulsion；Above-mentioned
Pressure control circuit.
Further, cooking apparatus is electric pressure cooking saucepan.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings:
Fig. 1 is the schematic diagram according to a kind of pressure control circuit of the utility model embodiment；
Fig. 2 is the circuit diagram according to a kind of optional pressure control circuit of the utility model embodiment；
Fig. 3 is the circuit diagram according to the optional pressure control circuit of another kind of the utility model embodiment；
Fig. 4 is the schematic diagram according to the optional pressure control circuit of another kind of the utility model embodiment；
Fig. 5 is the schematic diagram according to another pressure control circuit of the utility model embodiment；And
Fig. 6 is the schematic diagram according to a kind of cooking apparatus of the utility model embodiment.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model a part, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered
When the range for belonging to the utility model protection.
It should be noted that the specification and claims of the utility model and term " first " in above-mentioned attached drawing,
" second " etc. is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that in this way
The data used are interchangeable under appropriate circumstances, so that the embodiments of the present invention described herein can be in addition at this
In illustrate or description those of other than sequence implement.In addition, term " includes " and " having " and their any deformation, meaning
It includes to be not necessarily limited to clearly arrange for example, containing a series of system of units, product or equipment that figure, which is to cover non-exclusive,
Those of out unit, but may include other units being not clearly listed or intrinsic for these products or equipment.
Embodiment 1
According to the utility model embodiment, a kind of embodiment of pressure control circuit is provided.
Optionally, above-mentioned pressure control circuit can be applied to cooking apparatus, for example, cooking apparatus can be Voltage force
Pot, electric cooker with exhaust apparatus etc., but it is not limited only to this.Original relief valve is somebody's turn to do as solenoid valve in cooking apparatus.Its
In, solenoid valve is plugged in the exhaust outlet of cooking apparatus, and solenoid valve is used to be greater than or equal to pressure at expulsion in the pressure of cooking apparatus
In the case where open.
Specifically, the coil of solenoid valve upon power-up, close under the action of electromagnetic field, cook by coil generating electromagnetic field
Utensil of preparing food realization has pressure to cook, and when the pressure of cooking apparatus is greater than strength caused by coil magnetic field, solenoid valve is strong by air-flow
System is opened, and pot inner pressure is released.
Fig. 1 is according to a kind of schematic diagram of pressure control circuit of the utility model embodiment, as shown in Figure 1, the pressure
Control circuit includes: input unit 10, controller 20 and driving circuit 30.
Wherein, input unit 10 includes: output end, and input unit is for generating pressure adjustment signal；Controller 20 includes:
Input terminal and output end, the input terminal of controller and the output end of input unit connect, and controller is used to adjust letter based on pressure
Number output pulse-modulated signal；Driving circuit 30 includes: input terminal and output end, the input terminal of driving circuit and controller it is defeated
Outlet connection, the output end of driving circuit and the control terminal of solenoid valve connect, and driving circuit is used to be based on pulse-modulated signal control
The pressure at expulsion of solenoid valve processed.
Specifically, above-mentioned controller can be the main control chip of cooking apparatus, for example, it may be MCU (microcontroller list
Member, Micro Controller Unit), but it is not limited only to this.
In a kind of optional scheme, since the coil current size of solenoid valve will affect its size for generating magnetic field, into
One step influences pressure at expulsion.Therefore, pressure control circuit can be increased in cooking apparatus.For example, as shown in Figures 2 and 3,
MCU is connect by input terminals such as Key1, Key2 with input unit, and MCU passes through PWM (pulse width modulation, Pulse Width
Modulation) output end is connect with driving circuit, and the both ends of the coil of the output end and solenoid valve SV1 of driving circuit are (on i.e.
The control terminal stated) connection.When user needs that pressure at expulsion is adjusted, user can generate pressure tune with operation input device
Signal is saved, MCU upon receipt of the signal, can be by PWM mouthfuls of output pwm signals, for example, square wave can be exported, into one
Step exports the voltage of control SV1 by driving circuit, realizes the control to the coil current size of SV1, to realize to exhaust
The adjusting of pressure.
It should be noted that user can be by input unit, the pwm signal that adjusting controller exports in a certain range
Duty ratio, the duty ratio of pwm signal is smaller, driving circuit output voltage it is higher, the pressure at expulsion of solenoid valve is bigger.When with
When family is wanted to increase pressure, operation input device reduces the duty ratio of pwm signal, and the voltage for exporting driving circuit increases, and passes through
The electric current of the coil of solenoid valve increases, and the magnetic force that electromagnetic valve coil generates also just will increase, to increase pressure at expulsion, makes to eat
Object realizes high pressure culinary art.Conversely, increasing the duty ratio of pwm signal, the voltage for exporting driving circuit is reduced, and reduces coil
Electric current makes food realize low pressure culinary art to reduce pressure at expulsion.
By the utility model above-described embodiment, solenoid valve is set in cooking apparatus and blocks exhaust outlet, so that needing
When pressure at expulsion is adjusted, pressure adjustment signal can be generated by input unit, be exported by controller corresponding
Pulse-modulated signal, and by the voltage of driving circuit control solenoid valve, to control the coil current size of solenoid valve, and then control
The pressure at expulsion of solenoid valve processed realizes and artificially adjusts pressure at expulsion in a certain range, promotes the technology effect of user experience
Fruit, and then solve the problems, such as the pressure at expulsion technique for fixing of cooking apparatus in the prior art.
Optionally, as shown in Figure 1, driving circuit 30 includes: inverter cricuit 32, integrating circuit 34 and amplifying circuit 36.
Wherein, inverter cricuit 32 includes: first end and second end, the first end of inverter cricuit and the input terminal of driving circuit
Connection；Integrating circuit 34 includes: first end and second end, and the first end of integrating circuit and the second end of inverter cricuit connect；It puts
Big circuit 36 includes: first end and second end, and the first end of amplifying circuit is connected with the second end of integrating circuit, amplifying circuit
The connection of the output end of second end and driving circuit.
Specifically, controller can carry out reverse phase and level conversion by inverter cricuit after output pwm signal, into
Enter integrating circuit and obtain a smooth control signal, carries out Current amplifier, output control solenoid valve further across amplifying circuit
Voltage.By setting negater circuit, integrating circuit and amplifying circuit, the purpose that the voltage of solenoid valve is adjusted is realized,
And then achieve the purpose that the pressure at expulsion for adjusting cooking apparatus.
Optionally, as shown in Figure 1, inverter cricuit 32 includes: the first triode 322, first resistor 324 and second resistance
326。
Wherein, the base stage of the first triode 322 is connect by first resistor 324 with the first end of inverter cricuit 32, and first
The emitter of triode is grounded, and the collector of the first triode connects DC power supply, the collection of the first triode by second resistance 326
The connection of the second end of electrode and inverter cricuit.
Specifically, as shown in Figures 2 and 3, the first above-mentioned triode can be triode Q2, and the model of Q2 can be
SS8050, but it is not limited only to this；Above-mentioned first resistor can be resistance R4, and the resistance value of R4 can be 10K Ω, but not only limit
In this；Above-mentioned second resistance can be resistance R1, and the resistance value of R1 can be 1K Ω, but be not limited only to this, and Q2, R1 and R4 can
To be set according to practical control.The base stage of Q2 accesses the PWM mouth of MCU, the emitter ground connection of Q2, the collection of Q2 by R4
Electrode is connect by R1 with DC power supply VDD.Realize that the reverse phase of pulse-modulated signal and level turn by the first triode of setting
It changes, and avoids the electric current of input is excessive the first triode is caused to damage by setting first resistor and second resistance, further reach
To the purpose for the pressure at expulsion for adjusting cooking apparatus.
Optionally, as shown in Figure 1, integrating circuit 34 includes: 3rd resistor 342, first capacitor 344 and the second capacitor 346.
Wherein, the first end of 3rd resistor 342 and the first end of integrating circuit connect, the second end and integral of 3rd resistor
The second end of circuit connects；First capacitor 344 is connected between the second end of 3rd resistor and ground；Second capacitor 346 is connected on
Between the second end and ground of 3rd resistor.
Specifically, as shown in Figures 2 and 3, above-mentioned 3rd resistor can be resistance R2, and the resistance value of R2 can be 10K
Ω, but it is not limited only to this；Above-mentioned first capacitor can be electrolytic capacitor EC1, but be not limited only to this；The second above-mentioned capacitor can
To be capacitor C1, but it is not limited only to this, R2, EC1 and C1 can be set according to practical control.One end of R2 and Q2's
One end of collector connection, the other end of R2 and the anode of EC1 and C1 connect, the cathode of EC2 and the other end ground connection of C1.It is logical
It crosses setting and the smooth of pulse-modulated signal is realized by the integrating circuit that 3rd resistor, first capacitor and the second capacitor form, into one
Step achievees the purpose that the pressure at expulsion for adjusting cooking apparatus.
Optionally, as shown in Figure 1, amplifying circuit 36 includes: the second triode 362.
Wherein, the base stage of the second triode 362 and the first end of amplifying circuit connect, the emitter of the second triode with put
The second end connection of big circuit, the collector of the second triode connect DC power supply.
Specifically, as shown in Figures 2 and 3, the second above-mentioned triode can be triode Q1, the model of Q1
SS8050, but it is not limited only to this, it can be set according to practical control.The other end of the base stage of Q1 and R2, EC1 are just
Pole and the connection of one end of C1, the emitter of Q1 connect one end of the coil of SV1, and the collector of Q2 meets VDD.Pass through setting the two or three
Pole pipe realizes the amplification of pulse-modulated signal, further achievees the purpose that the pressure at expulsion for adjusting cooking apparatus.
Optionally, as shown in figure 4, the output end of controller 20 includes: the first output end and second output terminal, solenoid valve packet
It includes: the first control terminal and the second control terminal, driving circuit 30 further include: switching circuit 38.
Wherein, the first end of inverter cricuit 32 is connect with the first output end of controller 20, the second end of amplifying circuit 36
It is connect with the first control terminal of solenoid valve；The first end of switching circuit 38 and the second output terminal of controller connect, switching circuit
Second end and the second control terminal of solenoid valve connect, the control signal control electromagnetism that switching circuit is used to export based on controller
Valve turns on or off.
Specifically, as shown in Fig. 2, the first above-mentioned output end can be the PWM mouth of MCU, second output terminal can be MCU
Switch electromagnetic valve end, MCU by switch electromagnetic valve end export switch electromagnetic valve signal, when cooking apparatus need pressure culinary art
When, the switch electromagnetic valve signal of MCU output is 1 (high level), this signal driving switch circuit is by solenoid valve conduction.Pass through setting
Switching circuit is directly connect with controller, and control solenoid valve may be implemented and open or close, so that realizes cooking apparatus has pressure
It is cooked with without pressure.
Optionally, as shown in figure 4, switching circuit 38 includes: third transistor 382 and the 4th resistance 384.
Wherein, the base stage of third transistor 382 is connect by the 4th resistance 384 with the first end of switching circuit, and the three or three
The emitter of pole pipe is grounded, and the collector of third transistor and the second end of switching circuit connect.
Specifically, as shown in Fig. 2, above-mentioned third transistor can be triode Q3, the model of Q3 is SS8050, but not
It is only limitted to this；The 4th above-mentioned resistance can be resistance R5, and the resistance value of R5 is 1K Ω, but is not limited only to this, and Q3 and R5 can be with
It is set according to practical control.When cooking apparatus needs pressure culinary art, the switch electromagnetic valve signal of MCU output is 1
Q3 is connected in (high level), this signal, and then SV1 is connected.It can achieve by setting third transistor and be quickly switched on or off
Solenoid valve.
Optionally, as shown in figure 5, solenoid valve includes: the first control terminal and the second control terminal, driving circuit 30 further include:
Diode 310.
Wherein, the second end of amplifying circuit 36 and the first control terminal of solenoid valve connect；The anode and electromagnetism of diode 310
The second control terminal and ground connection of valve, the cathode of diode and the first control terminal of solenoid valve connect.
It should be noted that when the duty cycle adjustment of PWM to maximum when (PWM mouthfuls of output high level), the pole E of Q1 also will be defeated
0V out realizes exhaust purpose to turn off solenoid valve.When the duty ratio of PWM reduces, the E pole tension of Q1 is increased, and coil generates
Magnetic field also will increase, finally in some duty ratio of PWM, realize the unlatching of solenoid valve.Therefore, as long as determining that solenoid valve is opened
Open the duty ratio of corresponding PWM, so that it may realize through PWM come the purpose of switch electromagnetic valve.
Specifically, it as shown in figure 3, above-mentioned diode can be diode D1, the model 4148 of D1, but is not limited only to
This, can be set according to actual needs.By setting diode, prevent the reverse potential of solenoid valve from damaging driving circuit,
And no setting is required switching circuit, conducting wire is reduced, application is more convenient.
Optionally, as shown in Figure 1, input unit 10 includes: at least one key 12.
Wherein, key 12 includes: first end and second end, and the first end of key connects DC power supply by the 5th resistance 14,
The first end of key and the output end of input unit connect, the second end ground connection of key.
Specifically, as shown in Figures 2 and 3, MCU can connect 1 or more key, with 1 in the utility model embodiment
It is illustrated for a, above-mentioned key can be K1, model SW, but be not limited only to this；The 5th above-mentioned resistance can be
The resistance value of resistance R3, R3 can be 10K Ω, but be not limited only to this, and K1 and R3 can be set according to practical control.
Resistance R3 is as pull-up resistor, it can be ensured that and when K1 is pressed by the user, the Key1 mouth of MCU can receive suitable voltage value,
To determine that user needs to adjust the duty ratio of PWM.By being arranged at least one key, user's operation button as needed is realized,
To be adjusted to exhaust voltage.
Optionally, as shown in Figure 1, in the case where key includes: function selection key, controller 20 includes: storage mould
Block 22 and control module 24.
Wherein, memory module 22 is for storing the corresponding pressure at expulsion of multiple cooking functions；Control module 24 and storage mould
Block connection, the corresponding pressure at expulsion of cooking function for being chosen based on function selection key generate pulse-modulated signal.
Specifically, above-mentioned cooking function can be the pre-set different functions of cooking apparatus, in order to realize root
Different pressure is set according to different food, the corresponding pressure at expulsion of each function can be stored in a storage module in advance, i.e.,
According to the duty ratio of the pre-set PWM of each function, so that MCU can be according to the function after user selects some function
The duty ratio of the corresponding PWM of energy generates pwm signal, to control the voltage of solenoid valve.It is cooked by storing difference in a storage module
The corresponding pressure at expulsion of function of preparing food realizes the purpose that different pressures at expulsion are arranged according to different foods.
Through the above scheme, by increasing the circuit of a regulating winding electric current in cooking apparatus, user is allow to exist
The electric current of regulating winding in a certain range promotes user experience to achieve the purpose that control pressure.
Embodiment 2
According to the utility model embodiment, a kind of embodiment of cooking apparatus is additionally provided.
Fig. 6 is according to a kind of schematic diagram of cooking apparatus of the utility model embodiment, as shown in fig. 6, the cooking apparatus
It include: the pressure control circuit 00 in solenoid valve 40 and above-described embodiment 1.
Wherein, solenoid valve 40 is plugged in the exhaust outlet of cooking apparatus, is greater than or equal to row for the pressure in cooking apparatus
It is opened in the case where atmospheric pressure；Pressure control circuit 00 is used to control the pressure at expulsion of solenoid valve.
By the utility model above-described embodiment, solenoid valve is set in cooking apparatus and blocks exhaust outlet, so that needing
When pressure at expulsion is adjusted, pressure adjustment signal can be generated by input unit, be exported by controller corresponding
Pulse-modulated signal, and by the voltage of driving circuit control solenoid valve, to control the coil current size of solenoid valve, and then control
The pressure at expulsion of solenoid valve processed realizes and artificially adjusts pressure at expulsion in a certain range, promotes the technology effect of user experience
Fruit, and then solve the problems, such as the pressure at expulsion technique for fixing of cooking apparatus in the prior art.
Above-mentioned the utility model embodiment serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
In the above embodiments of the present invention, all emphasize particularly on different fields to the description of each embodiment, in some embodiment
The part not being described in detail, reference can be made to the related descriptions of other embodiments.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (12)
1. a kind of pressure control circuit characterized by comprising
Input unit, comprising: output end, the input unit is for generating pressure adjustment signal；
Controller, comprising: input terminal and output end, the input terminal of the controller are connect with the output end of the input unit,
The controller is used to export pulse-modulated signal based on the pressure adjustment signal；
Driving circuit, comprising: the output end of input terminal and output end, the input terminal of the driving circuit and the controller connects
It connects, the output end of the driving circuit and the control terminal of solenoid valve connect, and the driving circuit is used to be based on the impulse modulation
Signal controls the pressure at expulsion of the solenoid valve；
Wherein, the solenoid valve is plugged in the exhaust outlet of cooking apparatus, and the solenoid valve is used for the pressure in the cooking apparatus
It is opened in the case where more than or equal to the pressure at expulsion.
2. pressure control circuit according to claim 1, which is characterized in that the driving circuit includes:
Inverter cricuit, comprising: the input terminal of first end and second end, the first end of the inverter cricuit and the driving circuit connects
It connects；
Integrating circuit, comprising: the second end of first end and second end, the first end of the integrating circuit and the inverter cricuit connects
It connects；
Amplifying circuit, comprising: the second end of first end and second end, the first end of the amplifying circuit and the integrating circuit connects
It connects, the second end of the amplifying circuit is connect with the output end of the driving circuit.
3. pressure control circuit according to claim 2, which is characterized in that the inverter cricuit includes:
The base stage of first triode, first triode is connect by first resistor with the first end of the inverter cricuit, institute
State the emitter ground connection of the first triode, the collector of first triode connects DC power supply by second resistance, and described the
The collector of one triode is connect with the second end of the inverter cricuit.
4. pressure control circuit according to claim 2, which is characterized in that the integrating circuit includes:
3rd resistor, the first end of the 3rd resistor are connect with the first end of the integrating circuit, and the of the 3rd resistor
Two ends are connect with the second end of the integrating circuit；
First capacitor is connected between the second end and ground of the 3rd resistor；
Second capacitor is connected between the second end and ground of the 3rd resistor.
5. pressure control circuit according to claim 2, which is characterized in that the amplifying circuit includes:
The base stage of second triode, second triode is connect with the first end of the amplifying circuit, second triode
Emitter connect with the second end of the amplifying circuit, the collector of second triode connects DC power supply.
6. pressure control circuit according to claim 2, which is characterized in that the output end of the controller includes: first
Output end and second output terminal, the solenoid valve include: the first control terminal and the second control terminal, wherein
The first end of the inverter cricuit is connect with the first output end of the controller, the second end of the amplifying circuit and institute
State the first control terminal connection of solenoid valve；
The driving circuit further include: switching circuit, the second output terminal of the first end of the switching circuit and the controller
Connection, the second end of the switching circuit are connect with the second control terminal of the solenoid valve, and the switching circuit is used to be based on institute
The control signal for stating controller output controls the solenoid valve and turns on or off.
7. pressure control circuit according to claim 6, which is characterized in that the switching circuit includes:
The base stage of third transistor, the third transistor is connect by the 4th resistance with the first end of the switching circuit, institute
The emitter ground connection of third transistor is stated, the collector of the third transistor is connect with the second end of the switching circuit.
8. pressure control circuit according to claim 2, which is characterized in that the solenoid valve include: the first control terminal and
Second control terminal, wherein
The second end of the amplifying circuit is connect with the first control terminal of the solenoid valve；
The driving circuit further include: diode, the anode of the diode connect with the second control terminal of the solenoid valve and ground
It connects, the cathode of the diode is connect with the first control terminal of the solenoid valve.
9. pressure control circuit according to claim 1, which is characterized in that the input unit includes:
At least one key, the key include: first end and second end, and the first end of the key is connect directly by the 5th resistance
Galvanic electricity source, the first end of the key are connect with the output end of the input unit, the second end ground connection of the key.
10. pressure control circuit according to claim 9, which is characterized in that in the key include: function selection key
In the case where, the controller includes:
Memory module, for storing the corresponding pressure at expulsion of multiple cooking functions；
Control module is connect with the memory module, and the cooking function for being chosen based on the function selection key is corresponding
Pressure at expulsion generates the pulse-modulated signal.
11. a kind of cooking apparatus characterized by comprising
Solenoid valve is plugged in the exhaust outlet of cooking apparatus, is greater than or equal to the exhaust for the pressure in the cooking apparatus
It is opened in the case where pressure；
Pressure control circuit described in any one of claims 1 to 10.
12. cooking apparatus according to claim 11, which is characterized in that the cooking apparatus is electric pressure cooking saucepan.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822077645.1U CN209404436U (en) | 2018-12-11 | 2018-12-11 | Pressure control circuit and cooking utensil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822077645.1U CN209404436U (en) | 2018-12-11 | 2018-12-11 | Pressure control circuit and cooking utensil |
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| CN209404436U true CN209404436U (en) | 2019-09-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112869553A (en) * | 2019-11-30 | 2021-06-01 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance control method and device, cooking appliance and storage medium |
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2018
- 2018-12-11 CN CN201822077645.1U patent/CN209404436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112869553A (en) * | 2019-11-30 | 2021-06-01 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance control method and device, cooking appliance and storage medium |
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