CN215914318U - Food processer circuit and food processer - Google Patents

Abstract

The application provides a cooking machine circuit and cooking machine. The cooking machine comprises a host, a boiling cup and a water tank, the host comprises an air inlet, the boiling cup is communicated with the air inlet, and the cooking machine circuit comprises a water supply pump, a heating assembly, a sound detection circuit and a controller. The controller comprises a water control end and a heating control end which are respectively used for controlling the water supply of the water supply pump and the heating assembly to heat water into steam. The sound detection circuit comprises a sound collection device arranged on the host, the sound collection device is close to the air inlet relative to the water supply pump and the heating assembly and is used for collecting noise signals generated when steam enters the air inlet and converting the noise signals into electric signals. The controller also comprises a detection end electrically connected with the sound detection circuit, and the controller determines the difference between the temperature and the boiling point in the boiling cup according to the converted electric signal detected by the detection end. The accuracy of judging boiling can be improved.

Description

Food processer circuit and food processer

Technical Field

The application relates to the field of household appliances, in particular to a food processor circuit and a food processor.

Background

With the increasing living standard of people, many different types of food processors appear on the market. Some of them cooking machines have the function of heating edible material, and when edible material was heated to a certain extent, whether need judge edible material and reach the boiling point. In the related art, a container containing food materials is heated by a heating plate, and a temperature sensor disposed at a fixed position is used to detect the temperature. However, the food materials are heated unevenly, the temperature sensor cannot reflect the temperature of the food materials in time, and the food materials are likely to be stacked at the position of the temperature sensor to cover the temperature sensor, so that the detection temperature is inaccurate, and the judgment of whether the temperature reaches the boiling point is inaccurate, thereby causing misjudgment.

SUMMERY OF THE UTILITY MODEL

The application provides a modified cooking machine circuit and cooking machine can improve the accuracy of judging boiling.

The application provides a cooking machine circuit is applied to the cooking machine, and the cooking machine includes the host computer, boils out cup and water tank, and the host computer includes the air inlet, boils out cup and air inlet intercommunication, and the cooking machine circuit includes:

a water supply pump connected to the water tank for pumping water from the water tank;

the heating assembly is connected with the water supply pump and is used for heating water pumped out by the water supply pump into steam which is supplied to the boiling cup through the air inlet;

the sound detection circuit comprises a sound acquisition device, the sound acquisition device is arranged on the host, is close to the air inlet relative to the water supply pump and the heating assembly, acquires a noise signal generated when steam enters the air inlet, and converts the noise signal into an electric signal; and

the controller comprises a detection end, a water supply control end and a heating control end, the water supply control end is electrically connected with the water supply pump, and the controller controls the water supply pump through the water supply control end; the heating control end is electrically connected with the heating assembly, and the controller controls the heating assembly through the heating control end; the detection end is electrically connected with the sound detection circuit, the controller detects an electric signal through the detection end, and the difference between the temperature and the boiling point in the boiling cup is determined according to the electric signal.

In some embodiments, the cooking machine circuit includes working shaft, heating element, sound detection circuitry and controller, and sound detection circuitry includes the sound collection system who is close to the air inlet, and the noise signal that produces when so sound collection system can gather steam gets into the air inlet in the heating process, and whether the strong and weak reflection thick liquid of noise is close the boiling point to can improve the accuracy of judging boiling.

Furthermore, the sound detection circuit further comprises an amplifying circuit, the amplifying circuit is electrically connected between the sound collection device and the detection end, the electric signal converted by the sound collection device is amplified, and the controller detects the amplified electric signal through the detection end. In some embodiments, the amplifying circuit is electrically connected between the sound collecting device and the detection end, amplifies the electrical signal converted by the sound collecting device, facilitates the detection of the controller, and improves the detection precision of the circuit.

Furthermore, the sound detection circuit further comprises a blocking capacitor, and the blocking capacitor is electrically connected between the sound collection device and the amplifying circuit. In some embodiments, the dc blocking capacitor connected between the sound collection device and the amplification circuit can block direct current and alternating current, so as to ensure that the amplification circuit receives a changed electrical signal matched with the noise signal collected by the sound collection device, so that the electrical signal detected by the controller is more accurate, and the detection precision of the circuit can be improved.

Furthermore, the sound detection circuit also comprises an adjustable resistor, the adjustable resistor comprises a first end, a second end and an adjustable end, the amplifying circuit comprises a power amplifier electrically connected between the sound collection device and the detection end, and the power amplifier comprises a positive input end; the first end is electrically connected to the sound collection device, the second end is grounded, and the adjustable end is electrically connected to the positive input end. In some embodiments, the adjustable resistor adjusts the electrical signal converted by the sound detection device and transmits the adjusted electrical signal to the power amplifier for processing by the amplification circuit, thereby maintaining the stability of the circuit.

Furthermore, the sound detection circuit also comprises a direct current power supply end and a current-limiting resistor, wherein the current-limiting resistor is electrically connected between the sound acquisition device and the direct current power supply end; and/or

The sound collection device comprises a first output end and a second output end, the sound detection circuit comprises a filter capacitor, and the filter capacitor is connected between the first output end and the second output end in series.

In some embodiments, the sound collection device is connected with the direct current power supply end through the current limiting resistor, so that the current can be divided by the current limiting resistor, and the circuit is safe. In some embodiments, a filter capacitor is connected in series between the first output end and the second output end of the sound collection device, so that a direct current signal can be isolated, an alternating current signal can be connected, the electric signal converted according to the changed sound wave is ensured to be changed according to the same rule, and the detection accuracy of the circuit is improved.

Furthermore, the amplifying circuit comprises a first capacitor, the power amplifier further comprises a first gain setting end and a second gain setting end, and the first gain setting end is electrically connected to the second gain setting end through the first capacitor; and/or

The amplifying circuit comprises a second capacitor, the power amplifier further comprises a bypass end, and the bypass end is grounded through the second capacitor.

In some embodiments, the food processor circuit can adjust the gain multiple, adjust the dynamic range of the input signal, stabilize the power of the output signal, and improve the stability of the circuit through the first capacitor connected between the first gain setting terminal and the second gain setting terminal.

In some embodiments, the bypass terminal is grounded via the second capacitor to filter noise and maintain the circuit stable.

Furthermore, the food processor circuit comprises a filter circuit, and the amplifying circuit comprises an amplifying output end; the filter circuit is electrically connected between the amplifying output end and the detection end of the controller. In some embodiments, a filter circuit is designed between the detection end and the amplification output end of the controller, so that disturbance can be filtered, and the stability of the circuit is improved.

Furthermore, the filter circuit comprises a high-frequency filter circuit which is electrically connected between the amplifying output end and the detection end; the high-frequency filter circuit comprises a third capacitor and a first resistor, and the third capacitor and the first resistor are connected between the amplifying output end and the ground in series; and/or

The filter circuit comprises a high-pass filter circuit which is electrically connected between the amplifying output end and the detection end; the high-pass filter circuit comprises a fourth capacitor and a second resistor, the fourth capacitor is connected between the amplifying output end and the detection end in series, and the second resistor is electrically connected between the detection end and the ground.

In some embodiments, the high frequency filter circuit can eliminate high frequency noise and improve the detection accuracy of the circuit, the high frequency filter circuit comprises a third capacitor and a first resistor which are connected between the amplifying output end and the ground in series, and the circuit is simple. In some embodiments, the high-pass filter circuit can eliminate low-frequency noise, and the high-pass filter circuit comprises a fourth capacitor connected between the amplifying output end and the detection end in series and a second resistor electrically connected between the detection end and the ground, so that the circuit complexity is reduced, and the circuit is simple.

Furthermore, the food processor circuit also comprises a half-wave rectification circuit, and the water supply pump comprises an electromagnetic pump; the half-wave rectification circuit is electrically connected between the power supply and the electromagnetic pump; and/or

The sound collection device comprises an electret microphone.

In some embodiments, the half-wave rectification circuit processes sine wave current into positive half-wave current suitable for the electromagnetic pump, so that the possibility that the interior of the electromagnetic pump generates heat and is even burnt due to the positive-negative conversion of the current is prevented, and the safety of the circuit is improved. In some embodiments, the electret microphone has low cost, thereby reducing the cost of the food processor.

The application provides a cooking machine, includes as above arbitrary cooking machine circuit. The cooking machine comprises a main machine comprising an air inlet, a boiling cup detachably assembled on the main machine, a stirring cup assembly assembled on the main machine and a water tank.

Drawings

Fig. 1 is an overall schematic view of a food processor provided in an embodiment of the present application;

fig. 2 is an exploded schematic view of the food processor shown in fig. 1;

fig. 3 is a cross-sectional view of the food processor shown in fig. 1;

fig. 4 is a perspective view of a portion of the components of the food processor shown in fig. 1;

fig. 5 is a circuit block diagram of an food processor circuit according to an embodiment of the present application;

fig. 6 is a circuit diagram of the food processor circuit shown in fig. 5;

fig. 7 is a flowchart of a cooking control method according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" includes two, and is equivalent to at least two. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Fig. 1 is an overall schematic view of a food processor 100 according to an embodiment of the present application. Fig. 2 is an exploded schematic view of the food processor 100 shown in fig. 1.

Referring to fig. 1 and 2, the food processor 100 includes a main body 13, a boiling cup 11, a water tank 14 and a stirring cup assembly 12. In the present embodiment, the main body 13 includes a housing 1300, and the housing 1300 includes a main body portion 130 extending in a vertical direction, a cup support portion 131 extending from a bottom end of the main body portion 130 to one side, and a tank support portion 132 extending from a bottom end of the main body portion 130 to the other end. The boiling cup 11 is detachably assembled to the cup body support portion 131, and the water tank 14 is detachably assembled to the water tank support portion 132. The main body 130 includes a receiving space 134, and the blending cup assembly 12 is assembled in the receiving space 134. In some embodiments, the blending cup assembly 12 is removably assembled within the receiving space 134. The food processor 100 can include one or more blending cup assemblies 12. In some embodiments, the food processor 100 includes a plurality of stirring cup assemblies 12, and the plurality of stirring cup assemblies 12 can be detachably and replaceably assembled in the accommodating space 134 to realize different cooking functions of the food processor 100. For example, one of the blender cup assemblies 12 may be used to whip fruit juice, and the other blender cup assembly 12 may be used to grind food material. In other embodiments, at least one of the water tank 14 and the blender cup assembly 12 is fixedly assembled with the main frame 13 and is not detachable.

Fig. 3 is a partial cross-sectional view of the food processor 100 shown in fig. 1. Fig. 4 is a perspective view of a part of the components of the food processor 100 shown in fig. 1. Referring to fig. 2-4, in some embodiments, the food processor 100 includes the motor 133 located within the housing 1300. The blender cup assembly 12 includes a blender knife assembly (not shown). When the stirring cup assembly 12 is assembled in the accommodating space 134, the stirring blade assembly is connected to the motor 133. The motor 133 rotates to drive the stirring blade assembly to rotate, so as to stir the food material in the stirring cup assembly 12. In some embodiments, the body portion 130 includes a grout outlet 135. The beaten pulp in the blender cup assembly 12 can flow through the pulp outlet 135 into the cook cup 11. Boil out cup 11 and boil out the thick liquid, stirring cup subassembly 12 can need not to include heating device, and stirring cup subassembly 12 is uncharged, and is comparatively safe when the user washs. The main unit 13 includes an air inlet 137. The air inlet 137 is provided in the cup body support 131 and can communicate with the boiling cup 11.

Fig. 5 is a circuit block diagram of the food processor circuit 200 according to an embodiment of the present application. The food processor circuit 200 can be applied to the food processor 100.

Referring to fig. 3 to 5, the food processor circuit 200 includes a water supply pump 141, a heating assembly 136, a sound detection circuit 22, and a controller 21.

The water supply pump 141 is connected to the water tank 14 for pumping water from the water tank 14. In some embodiments, the food processor circuit 200 further comprises a flow meter 138, one end of the flow meter 138 being connected to the water tank 14 via a pipe 142, and the other end being connected to a water supply pump 141 via a pipe 142; the flow meter 138 detects the flow rate of water pumped out by the water supply pump 141.

The heating unit 136 is connected to the water supply pump 141 for heating the water pumped by the water supply pump 141 into steam, and the steam is supplied to the cooking cup 11 through the air inlet 137. The water supply pump 141 provides pressure for the heating assembly 136 to press the steam out of the heating assembly 136 and the pipeline 142, the steam is conveyed to the air inlet 137 and enters the cooking cup 11 through the air inlet 137 to heat the food in the cooking cup 11. In some embodiments, the food processor circuit 200 further includes a solenoid valve 139. One end of the heating component 136 is connected with a water supply pump 141 through a pipeline 142, the other end is connected with an electromagnetic valve 139 through the pipeline 142, the electromagnetic valve 139 is used for controlling the on-off of the pipeline 142 between the heating component 136 and the air inlet 137, and controlling steam to enter the boiling cup 11 or cutting off the steam to enter the boiling cup 11.

The sound detection circuit 22 includes a sound collection device 140, and the sound collection device 140 is provided in the main unit 13, is close to the air inlet 137 with respect to the water supply pump 141 and the heating unit 136, collects a noise signal generated when the steam enters the air inlet 137, and converts the noise signal into an electric signal. The air inlet 137 may be provided in a pipe 142 connecting the heating assembly 136 and the air inlet 137, or may be provided in the air inlet 137. When the steam enters the air inlet 137, the sound collection device 140 collects noise generated when the steam enters the air inlet 137, and converts the noise into an electrical signal. In some embodiments, the sound collection device 140 may include an electret microphone. The electret microphone has low cost, and further reduces the cost of the food processer circuit 200 and the food processer 100.

The controller 21 includes a detection terminal AOUT, a water supply control terminal BENG electrically connected to the water supply pump 141, and a heating control terminal RLY _ Q1, the controller 21 controlling the water supply pump through the water supply control terminal BENG; the heating control terminal RLY _ Q1 is electrically connected with the heating element 136, and the controller 21 controls the heating element 136 through the heating control terminal RLY _ Q1; the detecting terminal AOUT is electrically connected to the sound detecting circuit 22, the controller 21 detects the electrical signal outputted from the sound detecting circuit through the detecting terminal AOUT, and determines the difference between the temperature and the boiling point in the boiling cup 11 according to the electrical signal. For example, in some embodiments, the controller 21 records a time period T1 of the high level of the electrical signal output by the sound detection circuit 22 detected by the detection terminal AOUT in a fixed period, and when the time period T1 is greater than a preset threshold, it is determined that the temperature of the food material in the cooking cup 11 is far away from the boiling point, at this time, steam heating is continued, the controller 21 controls the heating element 136 to continue heating, and steam continues to enter the cooking cup 11 through the air inlet 137 to heat the food material inside the cooking cup 11; when the duration T1 is less than the preset threshold, it is determined that the temperature of the food material in the cooking cup 11 is close to the boiling point, at this time, the food processor 100 enters the step of finely controlling the steam heating, and the controller 21 can control the heating assembly 136 to heat with a small power to generate steam, or intermittently heat to generate steam, so as to prevent the food material from boiling excessively or overflowing the cooking cup 11 to cause a dangerous problem.

In one embodiment provided herein, the sound detection circuit 22 includes a sound collection device 140 near the air inlet, the sound collection device 140 can collect a noise signal generated when steam enters the air inlet during the heating process, and the intensity of the noise signal reflects whether the slurry is close to the boiling point. In the heating process, if the temperature of the food materials in the boiling cup 11 is far lower than the boiling point, steam enters the boiling cup 11 through the air inlet 137 and meets cold food materials, the steam is immediately dissolved and blocked at the air inlet 137, the position of the air inlet 137 can form a blocking-flushing-blocking cycle, and the aperture of the air inlet 137 is small, so that large noise is generated; if the temperature of the food material in the boiling cup 11 is close to the boiling point, when steam enters the boiling cup 11 through the air inlet 137, the food material in the boiling cup 11 cannot absorb heat in time, the steam is liquefied completely, the steam is continuously flushed with slurry and dissipated, the problem of blocking, flushing and blocking is not formed at the position of the air inlet, and the noise is reduced. The sound collection device 140 close to the air inlet 137 collects the noise generated when the steam enters the air inlet 137, and the food processor 100 judges whether the temperature of the food material in the cooking cup 11 is close to the boiling point according to the noise, so that the accuracy of boiling judgment can be improved.

Fig. 6 is a circuit diagram of the food processor circuit 200 shown in fig. 5. Referring to fig. 6, the food processor circuit 200 further includes a power supply circuit 24, a heating control circuit 25, and a water supply control circuit 26. The power supply circuit 24 may be connected to an ac power source, such as a commercial power source, to convert ac strong power into dc weak power, and may supply power to the controller 21, the heating control circuit 25, and the water supply control circuit 26. The power supply circuit 24 includes a power supply circuit 241 and a voltage conversion circuit 242, the power supply circuit 241 converts ac power into dc power and outputs the dc power through a first dc power supply terminal VDD, and the voltage conversion circuit 242 converts the dc voltage output by the power supply circuit 241 and outputs the dc voltage through a second dc power supply terminal VCC.

In some embodiments, the water supply control terminal BENG of the controller 21 is electrically connected to the water supply control circuit 26, and the water supply pump 141 is controlled to operate by controlling the water supply control circuit 26. In some embodiments, the heating control terminal RLY _ QI of the controller 21 is electrically connected to the heating control circuit 25, and controls the operation of the heating element 136 by controlling the heating control circuit 25.

In some embodiments, heating control circuit 25 includes a relay RLY having a switch in series with heating element 136 and a transistor Q11, the solenoid of relay RLY being electrically connected to the collector of transistor Q11; the base electrode of the triode Q1 is electrically connected with the heating control end RLY _ Q1, and the emission set is grounded; the controller 21 controls the on-off of the transistor Q11 to control the on-off of the relay RLY through the heating control terminal RLY _ Q1 so as to control the heating element 136.

In some embodiments, the food processor circuit 200 includes a silicon controlled SCR21, the silicon controlled SCR2 being connected in series between the water supply pump 141 and the power source (neutral and hot), the silicon controlled SCR21 being used to power the water supply pump 141. The water supply control circuit 26 is electrically connected with the controller 21 and the silicon controlled rectifier SCR21, and the controller 21 controls the water supply control circuit 26 to control the silicon controlled rectifier SCR21 and drive the water supply pump 141 to work. The water supply control circuit 26 comprises a pull-up resistor R20, a water supply optocoupler U2 and a switch circuit 29. The pull-up resistor R20 is connected in series between the first direct current supply end VDD and the input end of the water supply optocoupler U2, the controllable end of the silicon controlled rectifier SCR2 is electrically connected to the output end of the water supply optocoupler U2, and the water supply optocoupler U2 is used for isolating strong current and weak points, so that the circuit is protected to be safe. In some embodiments, the switch circuit 29 includes a transistor Q21, the switch circuit 29 is electrically connected between the input terminal of the water supply optocoupler U2 and the ground and is electrically connected with the water supply control terminal BENG, and the controller 21 controls the on/off of the water supply optocoupler U2 by controlling the on/off of the switch circuit 29 through the water supply control terminal BENG, so as to control the silicon controlled SCR2 to drive the water supply pump 141.

In some embodiments, the food processor circuit 200 further includes a half-wave rectifier circuit 28, the water supply pump 141 includes an electromagnetic pump; the half-wave rectifier circuit 28 is electrically connected between the power supply and the electromagnetic pump. In some embodiments, the half-wave rectifier circuit 28 includes a diode D21 in series with the solenoid pump, which is connected to the power supply through the half-wave rectifier circuit 28. The half-wave rectifying circuit 28 processes sine wave current into positive half-wave current suitable for the electromagnetic pump, so that the possibility that the interior of the electromagnetic pump generates heat and is even burnt due to the positive-negative conversion of the current is prevented, and the circuit safety is improved.

With continued reference to fig. 6, the sound detection circuit 22 further includes an amplifying circuit 23, the amplifying circuit 23 is electrically connected between the sound collection device 140 and the detection terminal AOUT, and is configured to amplify the electrical signal converted by the sound collection device 140, and the controller 21 detects the amplified electrical signal through the detection terminal AOUT. For example, in some embodiments, the electrical signal converted by the sound conversion device 140 is weak, and requires a very precise detector to directly detect the signal; as another example, in some embodiments, the electrical signal converted by the sound collection device 140 is very noisy and is not easily detected by the controller 21. Therefore, the amplifier circuit 23 is designed to amplify the electrical signal converted by the sound collection device 140, which is convenient for the controller 21 to detect, and saves cost while improving the circuit detection precision.

In some embodiments, the sound detection circuit 22 further includes a dc blocking capacitor C4, and the dc blocking capacitor C4 is electrically connected between the sound collection device 140 and the amplification circuit 23. In some embodiments, the dc blocking capacitor C4 connected between the sound collection device 140 and the amplification circuit 23 can block dc current and ac current, so as to ensure that the amplification circuit 23 receives a changed electrical signal matched with the noise signal collected by the sound collection device 140, and thus, the electrical signal detected by the controller 21 is more accurate, and the detection accuracy of the circuit can be improved.

In some embodiments, the sound detection circuit 22 further includes a dc power source terminal 225 and a current limiting resistor R1, the current limiting resistor R1 being electrically connected between the sound collection device 140 and the dc power source terminal 225. In some embodiments, the sound collection device 140 is connected to the dc power supply terminal 225 through a current limiting resistor R1, and the dc power supply terminal 225 is electrically connected to the second dc power supply terminal VCC, so that the current can be shunted by using the current limiting resistor R1, and the circuit is safe.

In some embodiments, the sound collection device 140 includes a first output 143 and a second output 144, and the sound detection circuit 22 includes a filter capacitor C3, the filter capacitor C3 being connected in series between the first output 143 and the second output 144. The filtering capacitor C3 is connected in series between the first output terminal 143 and the second output terminal 144 of the sound collection device 140, so that a direct current signal can be isolated, an alternating current signal can be switched on, the electrical signal converted according to the changed sound wave is ensured to be changed according to the same rule, and the accuracy of circuit detection is improved. In some embodiments, the sound detection circuit 22 further includes a first filter capacitor C1 and a second filter capacitor C2 connected in parallel and electrically connected between the dc power supply terminal 225 and ground. The current provided by the dc power source terminal 225 is filtered by the first filter capacitor C1 and the second filter capacitor C2, and the noise-filtered current reduces disturbance, thereby improving the stability of the circuit.

IN some embodiments, the sound detection circuit 22 further includes an adjustable resistor R2, the adjustable resistor R2 includes a first terminal 221, a second terminal 222, and an adjustable terminal 223, the amplification circuit 23 includes a power amplifier U1 electrically connected between the sound collection device 140 and the detection terminal AOUT, the power amplifier U1 includes a positive input terminal IN +; the first end 221 is electrically connected to the sound collection device 140, the second end 222 is grounded, and the adjustable end 223 is electrically connected to the positive input IN +. In some embodiments, the adjustable resistor R2 adjusts the electrical signal converted by the sound detection device 140 and transmits the adjusted electrical signal to the power amplifier U1 for processing by the amplification circuit 23 to maintain the stability of the circuit.

In some embodiments, the amplifying circuit 23 includes a first capacitor C5, the power amplifier U1 further includes a first GAIN setting terminal GAIN1 and a second GAIN setting terminal GAIN2, and the first GAIN setting terminal GAIN1 is electrically connected to the second GAIN setting terminal GAIN2 via a first capacitor C5. In some embodiments, the food processor circuit 200 adjusts the GAIN multiple, adjusts the dynamic range of the input signal, stabilizes the power of the output signal, and improves the stability of the circuit through the first capacitor C5 connected between the first GAIN setting terminal GAIN1 and the second GAIN setting terminal GAIN 2.

In some embodiments, the amplifying circuit 23 includes a second capacitor C6, and the power amplifier U1 further includes a bypass terminal BYPS connected to ground through the second capacitor C6. The bypass terminal BYPS is grounded via the second capacitor C6, so that noise can be filtered out and the circuit can be maintained stable.

In some embodiments, the food processor circuit 200 includes a filter circuit 27, and the amplification circuit 23 includes an amplification output 226; the filter circuit 27 is electrically connected between the amplified output terminal 226 and the detection terminal AOUT of the controller 21. In some embodiments, a filter circuit 27 is designed between the detection terminal AOUT and the amplification output terminal 226 of the controller 21, so as to filter noise and improve the stability of the circuit.

In some embodiments, the filter circuit 27 includes a high frequency filter circuit 271, and the high frequency filter circuit 271 is electrically connected between the amplifying output terminal 226 and the detecting terminal AOUT; the high frequency filter circuit 271 includes a third capacitor C8 and a first resistor R3, and the third capacitor C8 and the first resistor R3 are connected in series between the amplification output terminal 226 and the ground. In some embodiments, the high frequency filter circuit 271 can eliminate high frequency noise, and the high frequency filter circuit 271 includes a third capacitor C8 and a first resistor R3 connected in series between the amplifying output 226 and ground, thereby improving circuit accuracy.

In some embodiments, the filter circuit 27 includes a high-pass filter circuit 272, the high-pass filter circuit 272 being electrically connected between the amplified output terminal 226 and the detection terminal AOUT; the high-pass filter circuit 272 includes a fourth capacitor C9 and a second resistor R4, the fourth capacitor C9 is connected in series between the amplified output terminal 226 and the detection terminal AOUT, and the second resistor R4 is electrically connected between the detection terminal AOUT and ground. The high-pass filter circuit 272 can eliminate low-frequency noise, and the high-pass filter circuit 272 comprises a fourth capacitor C9 connected in series between the amplifying output end 226 and the detection end AOUT, and a second resistor R4 electrically connected between the detection end AOUT and the ground, so that the circuit complexity is reduced, and the circuit is simple.

Fig. 7 is a flowchart of a cooking control method according to an embodiment of the present application. The food processing control method can be applied to the food processing machine 100, and includes steps S91 to S97.

In step S91, it is determined whether steam needs to be output. In some embodiments, if steam is required to be output, step S92 is performed; if heating is not necessary, the process returns to step S91 to continue the determination.

In step S92, when the food processor 100 needs to output steam, the steam solenoid valve 139 is opened.

In step S93, the water supply pump 141 is controlled to pump water from the water tank 14, and the heating unit 136 is controlled to heat the water pumped from the water tank 14 by the water supply pump 141 into steam.

In step S94, the water supply pump 141 is controlled to provide pressure to press out steam, the steam is sent to the air inlet 137 through the pipeline 142, the steam enters the cooking cup 11 through the air inlet 137, and the food in the cooking cup 11 is heated.

In step S95, the electrical signal output from the sound detection circuit 22 is detected, and the duration T1 of the high level in the fixed period is recorded.

In step S96, it is determined whether the duration T1 of the high level is greater than the threshold, and if so, it indicates that the temperature of the food material in the boiling cup 11 is far away from the boiling point, and the process returns to step S93. Otherwise, it indicates that the temperature of the food material in the cooking cup 11 is close to the boiling point, and step S97 is executed.

In step S97, the fine control steam heating step is entered.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. The utility model provides a cooking machine circuit, is applied to the cooking machine, the cooking machine includes host computer (13), boils cup (11) and water tank (14), host computer (13) include air inlet (137), boil cup (11) with air inlet (137) intercommunication, its characterized in that, the cooking machine circuit includes:

a water supply pump (141) connected to the water tank (14) for pumping water from the water tank (14);

the heating assembly (136) is connected with the water supply pump (141) and is used for heating the water pumped by the water supply pump (141) into steam, and the steam is supplied to the boiling cup (11) through an air inlet (137);

the sound detection circuit (22) comprises a sound collection device (140), the sound collection device (140) is arranged on the host (13), is close to the air inlet (137) relative to the water supply pump (141) and the heating assembly (136), collects a noise signal generated when the steam enters the air inlet (137), and converts the noise signal into an electric signal; and

a controller (21) including a detection terminal, a water supply control terminal and a heating control terminal, the water supply control terminal being electrically connected to the water supply pump (141), the controller (21) controlling the water supply pump (141) through the water supply control terminal; the heating control end is electrically connected with the heating assembly (136), and the controller (21) controls the heating assembly (136) through the heating control end; the detection end is electrically connected with the sound detection circuit (22), the controller (21) detects the electric signal through the detection end, and the difference between the temperature and the boiling point in the boiling cup (11) is determined according to the electric signal.

2. The food processor circuit according to claim 1, wherein the sound detection circuit (22) further comprises an amplification circuit (23), the amplification circuit (23) is electrically connected between the sound collection device (140) and the detection terminal, and amplifies the electrical signal converted by the sound collection device (140), and the controller (21) detects the amplified electrical signal through the detection terminal.

3. The food processor circuit according to claim 2, wherein the sound detection circuit (22) further comprises a dc blocking capacitor electrically connected between the sound collection device (140) and the amplification circuit (23).

4. The food processor circuit of claim 2, wherein the sound detection circuit (22) further comprises an adjustable resistor comprising a first terminal (221), a second terminal (222), and an adjustable terminal (223), the amplification circuit (23) comprises a power amplifier electrically connected between the sound collection device (140) and the detection terminal, the power amplifier comprising a positive input terminal; the first end (221) is electrically connected to the sound collection device (140), the second end (222) is grounded, and the adjustable end (223) is electrically connected to the positive input end.

5. The food processor circuit of claim 1, wherein the sound detection circuit (22) further comprises a dc power supply terminal and a current limiting resistor electrically connected between the sound collection device (140) and the dc power supply terminal; and/or

The sound collection device (140) comprises a first output terminal (143) and a second output terminal (144), and the sound detection circuit (22) comprises a filter capacitor connected in series between the first output terminal (143) and the second output terminal (144).

6. The food processor circuit according to claim 4, wherein the amplifying circuit (23) comprises a first capacitor, the power amplifier further comprises a first gain setting terminal and a second gain setting terminal, and the first gain setting terminal is electrically connected to the second gain setting terminal through the first capacitor; and/or

The amplifying circuit (23) comprises a second capacitor, and the power amplifier further comprises a bypass end which is grounded through the second capacitor.

7. The food processor circuit of claim 2, comprising a filter circuit (27), wherein the amplifier circuit (23) comprises an amplifier output; the filter circuit (27) is electrically connected between the amplification output end and the detection end of the controller (21).

8. The food processor circuit according to claim 7, wherein the filter circuit (27) comprises a high frequency filter circuit (271), the high frequency filter circuit (271) being electrically connected between the amplifying output terminal and the detecting terminal; the high-frequency filter circuit (271) comprises a third capacitor and a first resistor, and the third capacitor and the first resistor are connected between the amplification output end and the ground in series; and/or

The filter circuit (27) comprises a high-pass filter circuit (272), and the high-pass filter circuit (272) is electrically connected between the amplification output end and the detection end; the high-pass filter circuit (272) comprises a fourth capacitor and a second resistor, the fourth capacitor is connected between the amplifying output end and the detection end in series, and the second resistor is electrically connected between the detection end and the ground.

9. The food processor circuit according to claim 1, further comprising a half-wave rectifier circuit (28), the water supply pump (141) comprising an electromagnetic pump; the half-wave rectifying circuit (28) is electrically connected between a power supply and the electromagnetic pump; and/or

The sound collection device (140) comprises an electret microphone.

10. A food processor is characterized by comprising,

a main body (13) including an air inlet (137);

a boiling cup (11) which is detachably assembled on the main machine (13);

a stirring cup assembly (12) assembled to the main machine (13);

a water tank (14) assembled to the main body (13); and

the food processor circuit of any one of claims 1-9.

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