CN214510876U - Food processer circuit and food processer - Google Patents

Abstract

The application provides a cooking machine circuit and cooking machine. The food processer circuit comprises a power supply connecting end, a power supply capacitor, a voltage comparison circuit and a power supply circuit. The power supply capacitor is connected with the load in parallel; the voltage comparison circuit comprises a comparison input end and a comparison output end which are connected with the power supply capacitor, and different comparison signals are respectively output when the voltage of the power supply capacitor is not lower than the reference voltage and is lower than the reference voltage; the power supply circuit is connected with the power supply connecting end and the comparison output end of the power supply capacitor and the voltage comparison circuit, and comprises a first power supply electronic circuit, a second power supply electronic circuit and a switching control circuit, wherein the first power supply electronic circuit and the second power supply electronic circuit are respectively connected between the power supply capacitor and the power supply connecting end, the switching control circuit is connected with the comparison output end, the first power supply electronic circuit and the second power supply electronic circuit are switched according to a comparison signal output by the voltage comparison circuit, and the resistance values of the first power supply electronic circuit and the second power supply electronic circuit are different. The cooking machine comprises a cooking machine circuit and a load. The reliability is high.

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. The functions of the food processor mainly include, but are not limited to, functions of making soybean milk, squeezing fruit juice, making rice paste, mincing meat, shaving ice, making coffee and/or blending facial masks and the like. The food processor can comprise a soybean milk machine, a stirrer or a wall breaking food processor and other machines for crushing and stirring food materials. The reliability of some food processors still needs to be improved.

SUMMERY OF THE UTILITY MODEL

The application provides a modified cooking machine circuit and cooking machine can improve cooking machine's reliability.

The application provides a cooking machine circuit is applied to the cooking machine, the cooking machine includes the load, include:

the power supply connecting end is used for connecting a power supply;

a supply capacitor connected in parallel with the load;

the voltage comparison circuit comprises a comparison input end and a comparison output end, wherein the comparison input end is connected with the power supply capacitor, collects a voltage signal of the power supply capacitor, and respectively outputs different comparison signals when the voltage of the power supply capacitor is not lower than a reference voltage and is lower than the reference voltage;

the power supply circuit is connected with the power supply connecting end, the power supply capacitor and the comparison output end of the voltage comparison circuit and comprises a first power supply electronic circuit, a second power supply electronic circuit and a switching control circuit, wherein the first power supply electronic circuit and the second power supply electronic circuit are respectively connected between the power supply capacitor and the power supply connecting end, the switching control circuit is connected with the comparison output end, the first power supply electronic circuit and the second power supply electronic circuit are switched according to a comparison signal output by the voltage comparison circuit, so that one of the first power supply electronic circuit and the second power supply electronic circuit is communicated with the power supply connecting end and the power supply capacitor, and the resistance value of the first power supply electronic circuit is different from the resistance value of the second power supply electronic circuit.

In some embodiments, the food processer circuit includes a power connection end, a power supply capacitor connected in parallel with the load, a voltage comparison circuit and a power supply circuit, the voltage comparison circuit is connected with the power supply capacitor, the power supply circuit includes a first power supply electronic circuit and a second power supply electronic circuit respectively connected between the power supply capacitor and the power connection end, and a switching control circuit connected with the voltage comparison circuit, the voltage of the power supply capacitor is compared with a reference voltage through the voltage comparison circuit of hardware, and when the voltage of the power supply capacitor is not lower than the reference voltage and lower than the reference voltage, the power connection end and the power supply capacitor are communicated through the power supply electronic circuits with different resistance values, the probability that the food processer circuit is damaged is reduced, and the reliability of the hardware circuit is higher.

Further, the food processer circuit is including being used for producing reference voltage's reference voltage circuit, the comparison input end includes first comparison input end and second comparison input end, first comparison input end is connected supply capacitor, the second comparison input end is connected reference voltage circuit, voltage comparison circuit includes the comparator, wherein one end in positive phase end and the inverting terminal of comparator is connected first comparison input end, the other end in the positive phase end and the inverting terminal of comparator is connected the second comparison input end, the output of comparator is connected the comparison output. In some embodiments, the voltage of the supply capacitor is compared with the reference voltage output by the reference voltage circuit through a comparator, and the circuit is simpler.

Further, cooking machine circuit includes voltage sampling circuit, voltage sampling circuit passes through first comparison input connects the comparator, and with supply capacitor connects, the comparator passes through voltage sampling circuit gathers supply capacitor's voltage signal. In some embodiments, the voltage sampling circuit can convert the voltage of the power supply capacitor into a voltage signal meeting the input requirement of the comparator, so that the probability that the comparator is damaged due to overhigh input voltage can be greatly reduced.

Furthermore, the voltage sampling circuit comprises a first sampling resistor and a second sampling resistor, the first sampling resistor and the second sampling resistor are connected between the power supply capacitor and the ground in series, and the first comparison input end is connected between the first sampling resistor and the second sampling resistor. In some embodiments, the first sampling resistor and the second sampling resistor divide the voltage of the supply capacitor. The comparator collects the voltage signal after voltage division, so that the situation that the comparator is damaged due to direct input of overhigh voltage can be avoided.

Furthermore, the food processor circuit comprises a filter capacitor, one end of the filter capacitor is connected with the first comparison input end, and the other end of the filter capacitor is grounded; and/or

The cooking machine circuit is including comparing current-limiting resistor, the one end of comparing current-limiting resistor connect in first sampling resistor with between the second sampling resistor, the other end of comparing current-limiting resistor connects first comparison input. In some embodiments, the filter capacitor may filter the voltage signal collected by the first comparison input terminal, so as to improve signal stability. The comparison current-limiting resistor can limit the current of the first comparison input end, and the comparator is prevented from being damaged due to overlarge current.

Furthermore, the first power supply electronic circuit comprises a power supply current limiting resistor connected in series between the power supply connecting end and the power supply capacitor, the second power supply electronic circuit comprises a bypass switch, the bypass switch is connected with the power supply current limiting resistor in parallel, the switching control circuit is connected with the bypass switch, the on-off of the bypass switch is controlled according to the comparison signal, when the bypass switch is switched off, the power supply current limiting resistor is communicated with the power supply connecting end and the power supply capacitor, and when the bypass switch is switched off, the bypass switch is communicated with the power supply connecting end and the power supply capacitor. In some embodiments, the switching control circuit switches the first power supply electronic circuit and the second power supply electronic circuit by controlling the on-off of the bypass switch, the circuit is simple, fewer circuit components are used, and the circuit cost can be reduced.

Further, the bypass switch comprises a relay, the switching control circuit comprises a triode, a base of the triode is connected with the comparison output end, one of a collector and an emitter of the triode is connected with the relay, and the other of the collector and the emitter of the triode is grounded. In some embodiments, the on-off of the relay is controlled through the on-off of the triode, so that the strong current is controlled by weak current, and the circuit safety is high.

Further, the food processer circuit comprises a rectifying circuit, and the rectifying circuit is connected between the power supply circuit and the power supply capacitor. In some embodiments, the rectifying circuit can charge the power supply capacitor after rectifying the alternating current of the power supply, so that the power supply capacitor is prevented from being reversely charged, the power supply capacitor is prevented from being damaged, and the circuit safety is high.

Further, the food processer circuit comprises a load driving circuit, the load driving circuit is connected with the load to drive the load to work, and the load driving circuit is connected between the power supply capacitor and the load. In some embodiments, the load driving circuit can perform relatively precise control on the load.

The application provides a cooking machine includes:

a load; and

the cooking machine circuit of any one of the above.

Drawings

Fig. 1 is a circuit block diagram of an food processor circuit provided in an embodiment of the present application;

fig. 2 is a circuit diagram of the food processor circuit of fig. 1;

fig. 3 is a schematic view of a food processor 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 a circuit block diagram of an food processor circuit 100 according to an embodiment of the present application. The food processor circuit 100 can be applied to a food processor including a load 15.

Referring to fig. 1, the food processor circuit 100 includes a power connection terminal 11, a power supply capacitor 12, a voltage comparison circuit 13, and a power supply circuit 14. The power connection terminal 11 includes a first power connection terminal 111 and a second power connection terminal 112 for connecting the power supply 16. The first power connection terminal 111 and the second power connection terminal 112 are connected to both ends of the power supply 16, respectively.

In some embodiments, supply capacitor 12 is connected in parallel with load 15. The voltage of the supply capacitor 12 is equal to the voltage across the load 15. Supply capacitor 12 may enable soft start of load 15. When the load 15 is started to work, the power supply capacitor 12 is charged firstly, and the voltage of the power supply capacitor 12 gradually rises, so that the voltage at two ends of the load 15 gradually rises, and the load 15 can be prevented from being damaged due to reasons such as overcurrent during starting.

In some embodiments, the voltage comparison circuit 13 includes a comparison input terminal Vin and a comparison output terminal Vout, the comparison input terminal Vin is connected to the power supply capacitor 12, collects a voltage signal of the power supply capacitor 12, and the comparison output terminal Vout outputs different comparison signals when the voltage of the power supply capacitor 12 is not lower than the reference voltage and is lower than the reference voltage. The voltage comparison circuit 13 may compare the voltage of the supply capacitor 12 with the reference voltage by a hardware circuit. The different comparison signals output by the comparison output terminal Vout may be different electrical signals. For example, when the voltage of the power supply capacitor 12 is not lower than the reference voltage, a high level is output; when the voltage of the power supply capacitor 12 is lower than the reference voltage, a low level is output.

In some embodiments, the power supply circuit 14 is connected to the power supply connection terminal 11, the power supply capacitor 12 and the comparison output terminal Vout of the voltage comparison circuit 13, and includes a first power supply sub-circuit 141, a second power supply sub-circuit 142 and a switching control circuit 143, the first power supply sub-circuit 141 and the second power supply sub-circuit 142 are respectively connected between the power supply capacitor 12 and the power supply connection terminal 11, the switching control circuit 142 is connected to the comparison output terminal Vout, and the first power supply sub-circuit 141 and the second power supply sub-circuit 142 are switched according to a comparison signal output by the voltage comparison circuit 13, so that one of the first power supply sub-circuit 141 and the second power supply sub-circuit 142 connects the power supply connection terminal 11 and the power supply capacitor 12. The power supply 16 charges the power supply capacitor 12 through the first power supply sub-circuit 141 or the second power supply sub-circuit 142 connected between the power supply connection terminal 11 and the power supply capacitor 12, and supplies power to the load 15 through the power supply capacitor 12, and a current path is formed between the power supply 16, the first power supply sub-circuit 141 or the second power supply sub-circuit 142 connected between the power supply connection terminal 11 and the power supply capacitor 12, and the load 15. The resistance of the first power supply sub-circuit 141 is different from the resistance of the second power supply sub-circuit 142.

In some embodiments, when the voltage of the power supply capacitor 12 is lower than the reference voltage, the switching control circuit 142 may control the first power supply sub-circuit 141 to connect the power supply connection terminal 11 and the power supply capacitor 12; when the voltage of the power supply capacitor 12 is not lower than the reference voltage, the switching control circuit 142 may control the second power supply sub-circuit 142 to connect the power connection terminal 11 and the power supply capacitor 12 for charging. The resistance value of the first power supply sub-circuit 141 may be greater than the resistance value of the second power supply sub-circuit 142. When cooking machine circuit 100 switch on 16, supply capacitor 12 is in charged state, and when supply capacitor 12 did not reach reference voltage, by the great first power supply electronic circuit 141 intercommunication power connection end 11 of resistance value and supply capacitor 12, so, in the current loop that power 16, first power supply electronic circuit 141 and load 15 constitute, the electric current can be less, can prevent that when cooking machine circuit 100 switch on 16, the circuit components and parts of cooking machine circuit 100 are damaged because of the too big quilt of instantaneous current. After the food processer circuit 100 is powered on for a period of time by the power supply 16, the circuit tends to be stable, the second power supply electronic circuit 142 with a smaller resistance value is connected with the power supply connecting end 11 and the power supply capacitor 12, so that in a current loop formed by the power supply 16, the second power supply electronic circuit 142 and the load 15, the current can be larger, and the large current required by the work of the load 15 can be met.

In some embodiments, the reference voltage may be the voltage of the supply capacitor 12 after charging is completed. In this way, the comparison output terminal Vout outputs different comparison signals during and after the charging of the power supply capacitor 12, so that the switching control circuit 142 switches the first power supply sub-circuit 141 and the second power supply sub-circuit 142. In other embodiments, the reference voltage may be a certain voltage value during the charging process of the power supply capacitor 12, that is, when the charging of the power supply capacitor 12 is not completed, the switching of the power supply electronic circuit is performed. The reference voltage can be determined according to the time length required for the circuit to stabilize after the food processor circuit 100 is powered on by the power supply 16 and the charging speed of the power supply capacitor 12.

In some embodiments of the present application, the food processor circuit 100 includes a power connection terminal 11, a power supply capacitor 12 connected in parallel with a load 15, a voltage comparison circuit 13 and a power supply circuit 14, the voltage comparison circuit 13 is connected with the power supply capacitor 12, the power supply circuit 14 includes a first power supply electronic circuit 141 and a second power supply electronic circuit 142 respectively connected between the power supply capacitor 12 and the power connection terminal 11, and a switching control circuit 143 connected with the voltage comparison circuit 13, the voltage comparison circuit 13 through hardware compares the voltage of the power supply capacitor 12 with a reference voltage, and when the voltage of the power supply capacitor 12 is not lower than the reference voltage and lower than the reference voltage, the power connection terminal 11 and the power supply capacitor 12 are connected through power supply electronic circuits with different resistance values, so that it is possible to prevent the circuit components from being damaged by transient current generated when the circuit is just powered on, and reduce the probability of damage to the food processor circuit 100, at the same time, after the circuit is stabilized, a large current required for the operation can be supplied to the load 15. In addition, compared with some food processer circuits which compare the voltage of the power supply capacitor 12 with the reference voltage in a software manner, the voltage comparison circuit 13 of the present application compares the voltage of the power supply capacitor 12 with the reference voltage through a hardware circuit, so that the time delay is reduced, and the problems of software logic errors and the like which may occur when software judges are avoided, therefore, the food processer circuit 100 of the present application and the food processer comprising the food processer circuit 100 have higher reliability.

Fig. 2 is a circuit diagram of the food processor circuit 100 in fig. 1.

Referring to fig. 1 and 2, in the present embodiment, the load 15 includes a motor 151. The motor 151 includes a variable frequency motor. The power supply 16 comprises an alternating current power supply (e.g. mains), the first power connection 111 being connected to the live line L of the power supply 16 and the second power connection 112 being connected to the neutral line N of the power supply 16. In other embodiments, where the power source 16 comprises a dc power source (e.g., a battery), the first power connection 111 may be connected to a positive terminal of the power source 16 and the second power connection 112 may be connected to a negative terminal of the power source 16.

In some embodiments, the first power supply electronic circuit 141 includes a power supply current limiting resistor R1 connected in series between the power supply connection terminal 11 and the power supply capacitor 12, the second power supply electronic circuit 142 includes a bypass switch 1421, the bypass switch 1421 is connected in parallel with the power supply current limiting resistor R1, the switching control circuit 143 is connected to the bypass switch 1421, on/off of the bypass switch 1421 is controlled according to the comparison signal, when the bypass switch 1421 is turned off, the power supply current limiting resistor R1 connects the power supply connection terminal 11 and the power supply capacitor 12, and when the bypass switch 1421 is turned on, the bypass switch 1421 connects the power supply connection terminal 11 and the power supply capacitor 12. The switching control circuit 143 switches the first power supply sub-circuit 142 and the second power supply sub-circuit 141 by controlling the on/off of the bypass switch 1421, and the circuit is simple, and has fewer circuit components, thereby reducing the circuit cost.

In this embodiment, when the bypass switch 1421 is closed, the bypass switch 1421 may be equal to a wire, and short-circuit the power supply current limiting resistor R1, so that the bypass switch 1421 is connected to the power connection end 11 and the power supply capacitor 12, and the current in the circuit is large, and large current required for normal operation can be provided for the motor 151; when the bypass switch 1421 is turned off, the power supply current limiting resistor R1 connects the power supply connection terminal 11 and the power supply capacitor 12. The current limiting resistor R1 for power supply can be a resistor with a large resistance value, so that when the first power supply circuit 141 is connected to the power connection terminal 11 and the power supply capacitor 12, the current in the circuit is small, and when the motor 151 is powered on, it can be prevented that the instantaneous current during power on is supplied to other circuit components in the processor circuit 100 to cause damage. For example, in the present embodiment, the food processor circuit 100 includes a filter circuit 114 (which can eliminate electromagnetic interference of the power supply 16 to the food processor circuit 100) and an overcurrent protection device 113 (e.g., a fuse) connected in series between the first power supply connection terminal 111 and the power supply circuit 14, and the current in the circuit is controlled by the first power supply electronic circuit 141, so that at least when the motor 151 is powered on, the probability that circuit components in the filter circuit 114 and the overcurrent protection device 113 are damaged due to excessive transient current is reduced.

In some embodiments, the bypass switch 1421 includes a Relay1, the switching control circuit 143 includes a transistor Q1, a base of the transistor Q1 is connected to the comparison output terminal Vout, one of a collector and an emitter of the transistor Q1 is connected to the Relay1, and the other of the collector and the emitter of the transistor Q1 is grounded. The on-off of the triode Q1 can be controlled by different comparison signals output by the comparison output end Vout, and the on-off of the triode Q1 can be controlled by controlling the on-off of the Relay Relay1 (namely, the on-off of the Relay Relay 1), so that the second electronic circuit 142 can be controlled to be disconnected or connected. In this embodiment, the second electronic circuit 142 includes a dc power supply terminal 1422, one end of an electromagnetic coil of the Relay1 is connected to the dc power supply terminal 1422, the other end of the electromagnetic coil is connected to a collector of the transistor Q1, and an emitter of the transistor Q1 is grounded. When the comparison output end Vout outputs a high level, the triode Q1 is conducted, the Relay Relay1 is electrified, and the second power supply electronic circuit 142 is communicated; when the comparison output end Vout outputs a low level, the triode Q1 is cut off, the Relay Relay1 is powered off, and the second power supply electronic circuit 142 is disconnected. The on-off of the Relay Relay1 is controlled through the on-off of the triode Q1, so that strong current is controlled by weak current, and the circuit safety is high.

In some embodiments, the food processor circuit 100 includes a reference voltage circuit 18 for generating a reference voltage. The comparison input terminal Vin includes a first comparison input terminal Vin1 and a second comparison input terminal Vin2, the first comparison input terminal Vin1 is connected to the supply capacitor 12, and the second comparison input terminal Vin2 is connected to the reference voltage circuit 18. The voltage comparison circuit 13 comprises a comparator U1A, one of the positive phase terminal and the negative phase terminal of the comparator U1A is connected to the first comparison input terminal Vin1, the other of the positive phase terminal and the negative phase terminal of the comparator U1A is connected to the second comparison input terminal Vin2, and the output terminal of the comparator U1A is connected to the comparison output terminal Vout. In this embodiment, the non-inverting terminal of the comparator U1A is connected to the first comparing input terminal Vin1, and the inverting terminal of the comparator U1A is connected to the second comparing input terminal Vin 2. The comparator U1A compares the voltage of the power supply capacitor 12 with the reference voltage output by the reference voltage circuit 18, and outputs a low level when the voltage of the power supply capacitor 12 is lower than the reference voltage, so that the comparison output terminal Vout outputs a low level to the switching control circuit 143, and controls the first power supply electronic circuit 141 to connect the power supply connection terminal 11 and the power supply capacitor C1; when the voltage of the power supply capacitor 12 is not lower than the reference voltage, a high level is output, so that the comparison output terminal Vout outputs the high level to the switching control circuit 143, and the second power supply electronic circuit 142 is controlled to connect the power supply connection terminal 11 and the power supply capacitor C1. The comparator U1A compares the voltage of the supply capacitor 12 with the reference voltage output by the reference voltage circuit 18, and the circuit is simple.

In other embodiments, the inverting terminal of the comparator U1A may be connected to the first comparing input terminal Vin1, and the non-inverting terminal of the comparator U1A may be connected to the second comparing input terminal Vin 2.

In some embodiments, the food processor circuit 100 includes a voltage sampling circuit 17, the voltage sampling circuit 17 is connected to the comparator U1A through a first comparison input terminal Vin1, and is connected to the power supply capacitor 12, and the comparator U1A collects a voltage signal of the power supply capacitor 12 through the voltage sampling circuit 17. The voltage sampling circuit 17 can convert the voltage of the power supply capacitor 12 into a voltage signal meeting the input requirement of the comparator U1A, so that the probability that the comparator U1A is damaged due to overhigh input voltage can be greatly reduced.

In this embodiment, the voltage sampling circuit 17 includes first sampling resistors R6, R7, R8 and a second sampling resistor R9, the first sampling resistors R6, R7, R8 and the second sampling resistor R9 are connected in series between the power supply capacitor 12 and the ground, and the first comparison input terminal Vin1 is connected between the first sampling resistors R6, R7, R8 and the second sampling resistor R9. The first sampling resistors R6, R7, R8 and the second sampling resistor R9 divide the voltage of the power supply capacitor 12. The comparator U1A collects the voltage signal after voltage division, and then converts the voltage signal to obtain the voltage of the power supply capacitor 12, so that the voltage of the power supply capacitor 12 can be prevented from being too high and directly input into the comparator U1A to damage the comparator U1A. Specifically, the first sampling resistors R6, R7, and R8 may be connected to the positive plate of the power supply capacitor 12, the second sampling resistor R9 may be grounded, and the comparator U1A collects a voltage signal of the second sampling resistor R9. In other embodiments, the first sampling resistors R6, R7 and R8 may be the same resistor, and the second sampling resistor R9 may be different resistors.

In this embodiment, one or more of the first sampling resistors R6, R7, R8 and the second sampling resistor R9 may be sampling resistors with a relatively large resistance value (for example, sampling resistors with a resistance value of 50 kilo-ohms or 1 megaohm), and an appropriate reference voltage is set at the same time, so that when the food processor including the food processor circuit 100 is subjected to plug and unplug electrical test, after the power of the food processor is cut off, the discharging speed of the power supply capacitor 12 through the first sampling resistors R6, R7, R8 and the second sampling resistor R9 is relatively slow, after the food processor is powered up again, the voltage of the power supply capacitor 12 is not lower than the reference voltage, so that the switching control circuit 143 may control the first sub power supply circuit 141 and the second sub power supply circuit 142 to switch, and during the plug and unplug electrical test of the food processor, the Relay1 may not be repeatedly switched on and off, and the current limiting resistor R1 may not be repeatedly impacted, the service lives of the Relay Relay1 and the power supply current limiting resistor R1 are prolonged, and the reliability of the two devices is improved. When putting into practical use at the cooking machine, can reset reference voltage for after electrifying again after the cooking machine outage, supply capacitor 12's voltage is less than reference voltage, so, improves security and reliability in the cooking machine use. In some embodiments, the supply capacitor 12 may comprise an electrolytic capacitor. The electrolytic capacitor has the characteristic of large capacitance, and more electric energy is stored.

In some embodiments, the food processor circuit 100 includes a filter capacitor C2, one end of the filter capacitor C2 is connected to the first comparison input terminal Vin1, and the other end of the filter capacitor C2 is grounded. The filter capacitor C2 can filter the voltage signal collected by the first comparison input terminal Vin1, so as to improve the signal stability.

In some embodiments, the food processor circuit 100 includes a comparison current-limiting resistor R10, one end of the comparison current-limiting resistor R10 is connected between the first sampling resistor R6, R7, R8 and the second sampling resistor R9, and the other end of the comparison current-limiting resistor R10 is connected to the first comparison input terminal Vin 1. The comparison current limiting resistor R10 can limit the current of the first comparison input terminal Vin1, and prevent the comparator U1A from being damaged due to the excessive current.

In some embodiments, the food processor circuit 100 includes a rectifier circuit 115, and the rectifier circuit 115 is connected between the power supply circuit 14 and the power supply capacitor 12. The rectifying circuit 115 can rectify the alternating current of the power supply 16 and then charge the power supply capacitor 12, so that the power supply capacitor 12 is prevented from being reversely charged, the power supply capacitor 12 is prevented from being damaged, and the circuit safety is high. The rectifier circuit 115 may be in the form of a rectifier bridge.

In some embodiments, the food processor circuit 100 includes a load driving circuit 19, the load driving circuit 19 is connected to the load 15, the load driving circuit 19 drives the load 15 to operate, and the load driving circuit 19 is connected between the power supply capacitor 12 and the load 15. The load driving circuit 19 can control the load 15 more precisely. In this embodiment, the load driving circuit 19 includes a motor driving circuit 191, and the motor driving circuit 191 is connected between the power supply capacitors 122 of the motor 151 for driving the motor 151.

Fig. 3 is a schematic diagram of a food processor 200 according to an embodiment of the present application.

Referring to fig. 3, the food processor 200 includes a main body 21, a cup assembly 22, and a food processor circuit 100. The cup assembly 22 is detachably assembled to the main body 21. In this embodiment, the host 21 can be in the form of a base, and provides electric energy for the food processor 200, and controls the food processor 200 to work. In other embodiments, the host 21 may be in the form of a handpiece, and the host 21 may cover the cup assembly 22. The main machine 21 includes a load 15, and the load 15 includes a motor 151.

In some embodiments, the host 21 includes a control circuit board (not shown), and the food processor circuit 100 is disposed on the control circuit board, connected to the motor 151, and drives the motor 151.

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. A cooking machine circuit is applied to cooking machine, cooking machine includes load (15), its characterized in that, cooking machine circuit includes:

a power supply connection terminal (11) for connecting a power supply (16);

a supply capacitor (12) connected in parallel with the load (15);

the voltage comparison circuit (13) comprises a comparison input end and a comparison output end, the comparison input end is connected with the power supply capacitor (12), voltage signals of the power supply capacitor (12) are collected, and when the voltage of the power supply capacitor (12) is not lower than the reference voltage and is lower than the reference voltage, the comparison output end outputs different comparison signals respectively;

a power supply circuit (14) connected to the power connection terminal (11), the power supply capacitor (12) and the comparison output terminal of the voltage comparison circuit (13), and including a first power supply sub-circuit (141), a second power supply sub-circuit (142) and a switching control circuit (143), wherein the first power supply sub-circuit (141) and the second power supply sub-circuit (142) are respectively connected between the power supply capacitor (12) and the power connection terminal (11), the switching control circuit (143) is connected to the comparison output terminal, and the first power supply sub-circuit (141) and the second power supply sub-circuit (142) are switched according to a comparison signal output by the voltage comparison circuit (13) to make one of the first power supply sub-circuit (141) and the second power supply sub-circuit (142) communicate the power connection terminal (11) and the power supply capacitor (12), the resistance value of the first power supply sub-circuit (141) is different from the resistance value of the second power supply sub-circuit (142).

2. The food processor circuit according to claim 1, comprising a reference voltage circuit (18) for generating the reference voltage, wherein the comparison input terminal comprises a first comparison input terminal and a second comparison input terminal, the first comparison input terminal is connected to the supply capacitor (12), the second comparison input terminal is connected to the reference voltage circuit (18), the voltage comparison circuit (13) comprises a comparator, one of an inverting terminal and an inverting terminal of the comparator is connected to the first comparison input terminal, the other of the inverting terminal and the inverting terminal of the comparator is connected to the second comparison input terminal, and an output terminal of the comparator is connected to the comparison output terminal.

3. The food processor circuit according to claim 2, comprising a voltage sampling circuit (17), wherein the voltage sampling circuit (17) is connected to the comparator through the first comparison input terminal and is connected to the power supply capacitor (12), and the comparator collects a voltage signal of the power supply capacitor (12) through the voltage sampling circuit (17).

4. The food processor circuit according to claim 3, wherein the voltage sampling circuit (17) comprises a first sampling resistor and a second sampling resistor, the first sampling resistor and the second sampling resistor are connected in series between the power supply capacitor (12) and ground, and the first comparison input terminal is connected between the first sampling resistor and the second sampling resistor.

5. The food processor circuit of claim 4, wherein the food processor circuit comprises a filter capacitor, one end of the filter capacitor is connected to the first comparison input terminal, and the other end of the filter capacitor is grounded; and/or

The cooking machine circuit is including comparing current-limiting resistor, the one end of comparing current-limiting resistor connect in first sampling resistor with between the second sampling resistor, the other end of comparing current-limiting resistor connects first comparison input.

6. The food processor circuit according to claim 1, wherein the first power supply electronic circuit (141) comprises a power supply current limiting resistor connected in series between the power supply connection terminal (11) and the power supply capacitor (12), the second power supply electronic circuit (142) comprises a bypass switch (1421), the bypass switch (1421) is connected in parallel with the power supply current limiting resistor, the switching control circuit (143) is connected to the bypass switch (1421), the bypass switch (1421) is controlled to be turned on or off according to the comparison signal, when the bypass switch (1421) is turned off, the power supply current limiting resistor communicates the power supply connection terminal (11) and the power supply capacitor (12), and when the bypass switch (1421) is turned on, the bypass switch (1421) communicates the power supply connection terminal (11) and the power supply capacitor (12).

7. The food processor circuit according to claim 6, wherein the bypass switch (1421) comprises a relay, the switching control circuit (143) comprises a transistor, a base of the transistor is connected to the comparison output, one of a collector and an emitter of the transistor is connected to the relay, and the other of the collector and the emitter of the transistor is connected to ground.

8. Food processor circuit according to claim 1, comprising a rectifier circuit (115), the rectifier circuit (115) being connected between the power supply circuit (14) and the power supply capacitor (12).

9. The food processor circuit according to claim 1, comprising a load driving circuit (19), wherein the load driving circuit (19) is connected to the load (15) to drive the load (15) to operate, and the load driving circuit (19) is connected between the power supply capacitor (12) and the load (15).

10. The utility model provides a cooking machine which characterized in that, cooking machine includes:

a load (15); and

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

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