Food processor power supply circuit and food processor control circuit

Abstract

The utility model relates to the field of household appliances, and discloses a food processor power supply circuit and a food processor control circuit. The power supply circuit of the food processor comprises a rectifier bridge circuit, a first electrolytic capacitor, a second electrolytic capacitor, a switching circuit, a power port and an output port, the rectifier bridge circuit comprises a first output pin, a second output pin, a first input pin and a second input pin, and the switching circuit is connected with the negative electrode of the first electrolytic capacitor and the first input pin when power voltage of a first voltage value is input into the power port. The switching circuit disconnects the negative electrode of the first electrolytic capacitor and the first input pin when a power supply voltage of a second voltage value is input into the power supply port, and the first voltage value is smaller than the second voltage value. Compared with the prior art, the food processor power supply circuit and the food processor control circuit provided by the embodiment of the utility model have the advantages that power supplies with different voltage values can be compatible, and the use convenience of the food processor is improved.

Description

Technical Field

[0001] The utility model relates to the field of household appliances, and in particular to a power supply circuit and a control circuit of a food processor. Background Art

[0002] At present, there are two main voltages in the world, one is the 220V system and the other is the 110V system. The soymilk machine, wall-breaking machine and other food processors on the market are not compatible with these two systems. Or an external transformer is required to convert the voltage. When household appliances produced in high-voltage areas are used in low-voltage areas or when household appliances produced in low-voltage areas are used in high-voltage areas, an external transformer is required for voltage conversion, which is less convenient to use. Utility Model Content

[0003] The utility model aims to provide a food processor power supply circuit and a food processor control circuit, which are compatible with power supplies of different voltage values ​​and improve the convenience of using the food processor.

[0004] In a first aspect, an embodiment of the present application provides a power supply circuit for a food processor, the food processor comprising a processing container, a drive motor and a food processing component for processing food, the processing container being formed with a food receiving cavity for containing food, the food processing component extending into the food receiving cavity and rotating relative to the processing container under the drive of the drive motor, the power supply circuit for the food processor comprising: a rectifier bridge circuit, a first electrolytic capacitor, a second electrolytic capacitor, a switch circuit, a power port and an output port, the output port being used to transmit voltage to the drive motor; the rectifier bridge circuit comprising a first output pin, a second output pin, a first input pin, and a second input pin, the first input pin and the second input pin The first pin is connected to the power port, the first output pin is connected to the output port, the first output pin is connected to the positive electrode of the first electrolytic capacitor, the second output pin is connected to the negative electrode of the second electrolytic capacitor, the positive electrode of the second electrolytic capacitor is connected to the negative electrode of the first electrolytic capacitor, and the switch circuit is connected between the negative electrode of the first electrolytic capacitor and the first input pin; when the power port inputs a power supply voltage of a first voltage value, the switch circuit connects the negative electrode of the first electrolytic capacitor and the first input pin, and when the power port inputs the power supply voltage of a second voltage value, the switch circuit disconnects the negative electrode of the first electrolytic capacitor and the first input pin, and the first voltage value is less than the second voltage value.

[0005] Compared with the prior art, in the food processor power supply circuit provided in the embodiment of the present application, the switch circuit connects the negative electrode of the first electrolytic capacitor and the first input pin when a power supply voltage of a first voltage value is input to the power port. At this time, the first electrolytic capacitor and the second electrolytic capacitor are connected in series, and the voltage output by the output port is the sum of the voltage across the first electrolytic capacitor and the voltage across the second electrolytic capacitor; the switch circuit disconnects the negative electrode of the first electrolytic capacitor and the first input pin when a power supply voltage of a second voltage value is input to the power port. At this time, the first electrolytic capacitor and the second electrolytic capacitor are connected in parallel, and the voltage output by the output port is the voltage across the first electrolytic capacitor or the voltage across the second electrolytic capacitor. In actual application, the parameter values ​​of the rectifier bridge circuit, the first electrolytic capacitor and the second electrolytic capacitor can be adjusted according to the first voltage value and the second voltage value, so as to achieve voltage output of the same voltage value under input voltages of different voltage values, be compatible with power supplies of different voltage values, and improve the convenience of using the food processor.

[0006] In an optional embodiment, the switching circuit includes a switching element, an MCU circuit connected to the switching element, and a power supply voltage detection circuit connected to the MCU circuit; the power supply voltage detection circuit is used to detect the voltage value of the power supply voltage; the MCU circuit is used to control the switching element to connect the negative electrode of the first electrolytic capacitor and the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is the first voltage value; the MCU circuit is used to control the switching element to disconnect the negative electrode of the first electrolytic capacitor and the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is the second voltage value.

[0007] In an optional embodiment, the MCU circuit includes an MCU chip, the MCU chip includes a power supply voltage detection pin and a control signal output pin, the control signal output pin is connected to the switching element, and the power supply voltage detection pin is connected to the power supply voltage detection circuit.

[0008] In an optional embodiment, the power supply voltage detection circuit includes: a detection power supply input port, a rectifier diode, a voltage divider resistor, a filter capacitor, and a detection signal output port, wherein the detection power supply input port is used to input the power supply voltage, the rectifier diode, the voltage divider resistor, and the filter capacitor are connected between the detection power supply input port and the detection signal output port, and the detection signal output port is connected to the power supply voltage detection pin.

[0009] In an optional embodiment, the power port includes a live wire port and a neutral wire port, the live wire port is connected to the first input pin, and the neutral wire port is connected to the second input pin.

[0010] In an optional embodiment, the first voltage value is 110V, and the second voltage value is 220V.

[0011] In a second aspect, an embodiment of the present application provides a food processor control circuit, the food processor comprising a processing container, a drive motor and a food processing component for processing food, a food receiving cavity for holding food being formed in the processing container, the food processing component extending into the food receiving cavity and rotating relative to the processing container under the drive of the drive motor, the food processor control circuit comprising: a food processor power supply circuit, an IPM circuit, an MCU circuit, and a power supply voltage detection circuit; the food processor power supply circuit comprises a rectifier bridge circuit, a first electrolytic capacitor, a second electrolytic capacitor, a switch element, a power supply port and an output port, the rectifier bridge circuit comprises a first output pin, a second output pin, a first input pin, and a second input pin, the first input pin and the second input pin are connected to the power supply port, the first output pin is connected to the output port, the first output pin is connected to the positive electrode of the first electrolytic capacitor, the second output pin is connected to the negative electrode of the second electrolytic capacitor, the positive electrode of the second electrolytic capacitor is connected to the negative electrode of the first electrolytic capacitor, and the The switch element is connected between the negative electrode of the first electrolytic capacitor and the first input pin; the IPM circuit includes an IPM chip, the IPM chip includes a first power pin and a three-phase power output pin, the first power pin is connected to the output port, and the three-phase power output pin is used to output three-phase electricity to the three-phase motor; the power supply voltage detection circuit is used to detect the voltage value of the power supply voltage; the MCU circuit includes an MCU chip, the MCU chip includes a power supply voltage detection pin and a control signal output pin, the control signal output pin is connected to the switch element, and the power supply voltage detection pin is connected to the power supply voltage detection circuit; the MCU circuit is used to control the switch element to connect the negative electrode of the first electrolytic capacitor and the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is a first voltage value, and control the switch element to disconnect the negative electrode of the first electrolytic capacitor and the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is a second voltage value, and the first voltage value is less than the second voltage value.

[0012] In an optional embodiment, the food processor control circuit also includes: a power switch circuit; the power switch circuit includes: a transformer, a switching power supply chip, a first voltage-stabilizing transistor, and a second voltage-stabilizing transistor; the transformer includes a primary winding, a secondary winding and a tertiary winding, the primary winding is used to input the power supply voltage, the primary winding is connected to the switching power supply chip, the secondary winding is connected to the pre-stabilization voltage input terminal of the first voltage-stabilizing transistor, the post-stabilization voltage output terminal of the first voltage-stabilizing transistor is a first voltage output port, the first voltage output port is connected to the pre-stabilization voltage input terminal of the second voltage-stabilizing transistor, the post-stabilization voltage output terminal of the second voltage-stabilizing transistor is a second voltage output port, the first voltage output port is connected to the IPM chip, and the second voltage output port is connected to the MCU chip.

[0013] In an optional embodiment, the MCU chip also includes: a heating control pin; the food processor control circuit also includes: a heating drive circuit; the heating drive circuit includes a thyristor rectifier and a drive optocoupler, the thyristor rectifier is used to be connected to the heating power main line, the drive optocoupler is connected to the heating control pin and the second voltage output port, and the drive optocoupler controls the thyristor rectifier to be turned on / off under the control of the heating control pin.

[0014] In an optional embodiment, the MCU chip also includes: a power zero-crossing detection pin; the food processor control circuit also includes: a power zero-crossing detection circuit; the power zero-crossing detection circuit includes a first detection power input port and a detection optocoupler, the first detection power input port is used to connect to a power supply, and the detection optocoupler is connected to the second voltage output port and the power zero-crossing detection pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the structure of the power supply circuit of the food processor provided in the first embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the structure of the power supply circuit of the food processor provided in the first embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of a switch circuit provided in some embodiments of the present application;

[0019] Figure 4 A schematic diagram of the structure of a power supply voltage detection circuit provided in some embodiments of the present application;

[0020] Figure 5 A structural schematic diagram of a food processor control circuit provided in Embodiment 2 of the present application;

[0021] Figure 6 A schematic diagram of the structure of a food processor power supply circuit in a food processor control circuit provided in Embodiment 2 of the present application;

[0022] Figure 7 A schematic diagram of a food processor power supply circuit in a food processor control circuit provided by another embodiment of the present application;

[0023] Figure 8 A schematic diagram of the structure of a power switch circuit in a food processor control circuit provided in the second embodiment of the present application;

[0024] Fig. 9 A schematic diagram of the structure of a heating drive circuit in a food processor control circuit provided in the second embodiment of the present application;

[0025] Fig.10 This is a schematic diagram of the structure of a power zero-crossing detection circuit in a food processor control circuit provided in the second embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention but merely represents selected embodiments of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0030] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0031] The first embodiment of the utility model provides a power supply circuit for a food processor, the food processor comprising a processor container, a drive motor and a food processing member for processing food, a food receiving cavity for containing food is formed in the processor container, the food processing member extends into the food receiving cavity and rotates relative to the processor container under the drive motor. Figure 1 As shown, the food processor control circuit includes: a rectifier bridge circuit U201 , a first electrolytic capacitor EC201 , a second electrolytic capacitor EC202 , a switch circuit 10 , a power port 20 and an output port 30 . Among them, the rectifier bridge circuit U201 includes a first output pin 1, a second output pin 4, a first input pin 2, and a second input pin 3, the first input pin 2 and the second input pin 3 are connected to the power port 20, the first output pin 1 is connected to the output port 30, the first output pin 1 is connected to the positive electrode of the first electrolytic capacitor EC201, the second output pin 4 is connected to the negative electrode of the second electrolytic capacitor EC202, the positive electrode of the second electrolytic capacitor EC202 is connected to the negative electrode of the first electrolytic capacitor EC201, and the switch circuit 10 is connected between the negative electrode of the first electrolytic capacitor EC201 and the first input pin 2; the switch circuit 10 connects the negative electrode of the first electrolytic capacitor EC201 and the first input pin 2 when the power port 20 inputs a power supply voltage of a first voltage value, and the switch circuit 10 disconnects the negative electrode of the first electrolytic capacitor EC201 and the first input pin 2 when the power port 20 inputs the power supply voltage of a second voltage value, and the first voltage value is less than the second voltage value. In addition, the food processor power supply circuit may further include a first resistor R201 connected across the first electrolytic capacitor EC201 and a second resistor R202 connected across the second electrolytic capacitor EC202.

[0032] Specifically, in some embodiments of the present application, the first voltage value may be, for example, 110 V, and the second voltage value may be, for example, 220 V. It is understandable that the first voltage value may be, for example, 110 V, and the second voltage value may be, for example, 220 V, which are only examples in some embodiments of the present application and do not constitute a limitation. In some other embodiments of the present application, the first voltage value may be, for example, 36 V, and the second voltage value may be, for example, 72 V, or other voltage values.

[0033] Further, in some embodiments of the present application, the power port 20 may include, for example, a live port ACL and a neutral port ACN, the live port ACL is connected to the first input pin 2 , and the neutral port ACN is connected to the second input pin 3 .

[0034] Please refer to Figure 2 The rectifier bridge circuit U201 includes a first diode U201-D1, a second diode U201-D2, a third diode U201-D3, and a fourth diode U201-D4. For example, the first voltage value is 110V and the second voltage value is 220V.

[0035] When a power supply voltage of 110V is input to the power port 20, the switch circuit 10 is closed, and the negative electrode of the first electrolytic capacitor EC201 is connected to the first input pin 2. In this case, when the voltage of the live port ACL is positive, the current flows through the second electrolytic capacitor EC202 and the fourth diode U201-D4 and flows back to the neutral port ACN, and the voltage across the second electrolytic capacitor EC202 is about 155V. When the voltage of the neutral port CAN is positive, the current flows through the third diode U201-D3 and the first electrolytic capacitor EC201 and flows back to the live port ACL, and the voltage across the first electrolytic capacitor EC201 is about 155V. The first electrolytic capacitor EC201 and the second electrolytic capacitor EC202 are connected in series, and the voltage output by the output port is the sum of the voltages of the first electrolytic capacitor EC201 and the second electrolytic capacitor EC202, and the output voltage is 310V.

[0036] When the power supply voltage of 220V is input to the power port 20, the switch circuit 10 is disconnected, and the cathode of the first electrolytic capacitor EC201 is disconnected from the first input pin 2. When the voltage of the live port ACL is positive, the current flows through the first diode U201-D1, the first electrolytic capacitor EC201, the second electrolytic capacitor EC202, the fourth diode U201-D4 and flows back to the neutral port CAN; when the voltage of the neutral port CAN is positive, the current flows through the third diode U201-D3, the first electrolytic capacitor EC201, the second electrolytic capacitor EC202, the second diode U201-D2 and flows back to the live port ACL, and the output voltage is also 310V.

[0037] Compared with the prior art, in the food processor power supply circuit provided in the first embodiment of the present application, a switch circuit is set to connect / disconnect the negative electrode of the first electrolytic capacitor EC201 and the first input pin 2, so as to achieve a voltage output of the same voltage value under input voltages of different voltage values, be compatible with power supplies of different voltage values, and improve ease of use.

[0038] Please refer to Figure 3 , Figure 3The structure diagram of the switch circuit 10 in some embodiments of the present application is shown. In some embodiments of the present application, the switch circuit 10 may include a switch element 101, an MCU circuit 102 connected to the switch element 101, and a power supply voltage detection circuit 103 connected to the MCU circuit 102; the power supply voltage detection circuit 103 is used to detect the voltage value of the power supply voltage; the MCU circuit 102 is used to control the switch element 101 to connect the negative electrode of the first electrolytic capacitor EC201 with the first input pin 2 when the power supply voltage detection circuit 103 detects that the voltage value of the power supply voltage is the first voltage value; the MCU circuit 102 is used to control the switch element 101 to disconnect the negative electrode of the first electrolytic capacitor EC201 from the first input pin 2 when the power supply voltage detection circuit 103 detects that the voltage value of the power supply voltage is the second voltage value. Wherein, the MCU circuit 102 includes an MCU chip, and the MCU chip includes a power supply voltage detection pin and a control signal output pin, the control signal output pin is connected to the switch element 101, and the power supply voltage detection pin is connected to the power supply voltage detection circuit 103. By setting the MCU circuit 102 and the power supply voltage detection circuit 103, the negative electrode of the first electrolytic capacitor EC201 is connected to the first input pin 2 when the power supply voltage of a first voltage value is input to the power port 20, and the negative electrode of the first electrolytic capacitor EC201 is disconnected from the first input pin 2 when the power supply voltage of a second voltage value is input to the power port 20. By controlling the switch element 101 through the MCU chip, the stability of the control process of closing / opening the switch element 101 can be improved.

[0039] Please refer to Figure 4 , Figure 4 FIG. 1 is a schematic diagram of the structure of the power supply voltage detection circuit 103 provided in some embodiments of the present application. Figure 4 As shown, the power supply voltage detection circuit 103 includes detection power supply input ports PL and PN, rectifier diodes D701 and D702, voltage dividing resistors R701, R702, R704, a filter capacitor C701, and a detection signal output port P_OVP_HEAT_AD. The detection power supply input ports PL and PN are used to connect to the power supply. The rectifier diodes D701 and D702, the voltage dividing resistors R701, R702, R704, and the filter capacitor C701 are connected between the detection power supply input ports PL and PN and the detection signal output port P_OVP_HEAT_AD. The detection signal output port P_OVP_HEAT_AD is connected to the power supply voltage detection pin P_OVP_HEAT_AD (pin 8) of the MCU chip.

[0040] Furthermore, in different embodiments of the present application, the switch element 101 may be, for example, a relay, a thyristor or other electronic components, and may be flexibly configured according to actual needs.

[0041] A second embodiment of the present application provides a food processor control circuit, the food processor comprising a cooking container, a driving motor and a food processing member for processing food, a food receiving cavity for containing food is formed in the cooking container, the food processing member extends into the food receiving cavity and rotates relative to the cooking container under the drive of the driving motor, such as Figure 5 As shown, the food processor control circuit includes: a food processor power supply circuit 100, an IPM circuit 200, an MCU circuit 300, and a power supply voltage detection circuit 400. Figure 6 As shown, the food processor power supply circuit 100 includes a rectifier bridge circuit U201, a first electrolytic capacitor EC201, a second electrolytic capacitor EC202, a switch element 10, a power port 20 and an output port 30, the rectifier bridge circuit U201 includes a first output pin 1, a second output pin 4, a first input pin 2, and a second input pin 3, the first input pin 2 and the second input pin 3 are connected to the power port 20, the first output pin 1 is connected to the output port 30, the first output pin 1 is connected to the positive electrode of the first electrolytic capacitor EC201, the second output pin 4 is connected to the negative electrode of the second electrolytic capacitor EC202, the positive electrode of the second electrolytic capacitor EC202 is connected to the negative electrode of the first electrolytic capacitor EC201, and the switch element 10 is connected between the negative electrode of the first electrolytic capacitor EC201 and the first input pin 2. The IPM circuit 200 includes an IPM chip, the IPM chip includes a first power supply pin and a three-phase power supply output pin, the first power supply pin is connected to the output port 30, and the three-phase power supply output pin is used to output three-phase electricity to the drive motor. The power supply voltage detection circuit 400 is used to detect the voltage value of the power supply voltage. The MCU circuit 300 includes an MCU chip, the MCU chip includes a power supply voltage detection pin and a control signal output pin, the control signal output pin is connected to the switch element 10, and the power supply voltage detection pin is connected to the power supply voltage detection circuit 400; the MCU circuit 300 is used to control the switch element 10 to connect the negative electrode of the first electrolytic capacitor EC201 with the first input pin 2 when the power supply voltage detection circuit 400 detects that the voltage value of the power supply voltage is a first voltage value, and control the switch element 10 to disconnect the negative electrode of the first electrolytic capacitor EC201 from the first input pin 2 when the power supply voltage detection circuit 400 detects that the voltage value of the power supply voltage is a second voltage value, and the first voltage value is less than the second voltage value.

[0042] Compared with the prior art, the combination circuit of the food processor power supply circuit 100, the MCU circuit 300, and the power supply voltage detection circuit 400 in the food processor control circuit provided in the second embodiment of the present application has the same circuit structure as the food processor power supply circuit of the aforementioned embodiment, and therefore has the same technical effects as the aforementioned embodiments. For details, please refer to the specific description in the aforementioned embodiments.

[0043] Further, such as Figure 7 As shown, in some other embodiments of the present application, the food processor control circuit may further include: a power switch circuit 500. Figure 8 As shown, the power switch circuit 500 includes: a transformer T301, a switch power chip U301, a first voltage-stabilizing transistor U302, and a second voltage-stabilizing transistor U304; the transformer T301 includes ( Figure 2 The winding with pins 1 and 3 in the middle), the secondary winding ( Figure 2 The winding with pins 4 and 5) and the third winding ( Figure 2 The pin 3 of the primary winding is connected to the switch power chip U301, the switch power chip U301 is connected to the first voltage output port, a 15V voltage is input through the first voltage output port, and the pin 1 of the primary winding is connected to the external power supply KG. In some embodiments of the present application, Figure 2 As shown, electronic components such as diode D301, resistor R302, electrolytic capacitor EC302, resistor R303, capacitor C302, diode D303, resistor R306, capacitor C304, electrolytic capacitor EC305, resistor R310, diode D305, capacitor C306, etc. may also be included.

[0044] Further, such as Figure 8 As shown, the pin 4 of the secondary winding is grounded, the pin 5 of the secondary winding is connected to the pre-stabilization voltage input terminal 1 (Vin) of the first voltage stabilizing transistor U302 (L7815), and the post-stabilization voltage output terminal 3 (Vout) of the first voltage stabilizing transistor U302 is the first voltage output port. Figure 2 The figure shows a schematic diagram of the case where the first voltage is +15V. The first voltage output port (+15V) is connected to the voltage input terminal 1 (Vin) before voltage regulation of the second voltage stabilizing transistor U304 (L7805), and the voltage output terminal 3 (Vout) after voltage regulation of the second voltage stabilizing transistor U304 is the second voltage output port. Figure 2 FIG. 4 is a schematic diagram showing a case where the second voltage is +5V. In addition, in some embodiments of the present application, Figure 2As shown, electronic components such as electrolytic capacitors EC303, EC304, EC306, capacitor C307, diode D304, etc. may also be included.

[0045] like Figure 8 As shown, pin 7 of the third winding is connected to the third voltage output port (+5V_G), and the third voltage output port is grounded (5V_GND). The third voltage output port can output a safe voltage such as +5V for light-emitting diode IC301 and other electronic components to emit light. In actual application, the voltage output by the third voltage output port can power exposed electronic devices such as the external indicator light of the device. Since the third voltage output port is grounded (5V_GND), the third voltage is a safe voltage, which can improve the safety of electronic equipment. In addition, Figure 2 As shown, electronic components such as resistors R301, R304, R305, R307, R308, R309, and R311, capacitors C301, C303, and C305, an electrolytic capacitor EC301, and diodes D302 and U303 may also be included.

[0046] Furthermore, in some other embodiments of the present application, the MCU chip may also include: a heating control pin; Figure 7 As shown, the food processor control circuit may further include: a heating drive circuit 600. Fig. 9 As shown, the heating drive circuit 600 includes a thyristor rectifier TRC601 and a driving optocoupler U601. The thyristor rectifier TRC601 is used to be connected to the main line of the heating power supply. The driving optocoupler U601 is connected to the heating control pin of the MCU chip and the second voltage output port +5V. The driving optocoupler U601 controls the on / off of the thyristor rectifier TRC601 under the control of the heating control pin.

[0047] Furthermore, in some other embodiments of the present application, the MCU chip may further include: a power supply zero-crossing detection pin; Figure 7 As shown, the food processor control circuit may further include: a power supply zero-crossing detection circuit 700. Fig.10 As shown, 700 includes a first detection power input port PL, PN and a detection optical coupler U801, the first detection power input port PL, PN is used to connect to the power supply, and the detection optical coupler U801 is connected to the second voltage output port +5V and the power zero-crossing detection pin P_ZO (pin 2) of the MCU chip. In addition, as Fig.10 As shown, the power supply zero-crossing detection circuit 700 may further include components such as resistors R801, R802, R803, R804, a capacitor C801, and a diode D801.

[0048] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A power supply circuit for a food processor, characterized in that: The food processor comprises a cooking container, a driving motor and a food processing part for processing food, wherein a food receiving cavity for containing food is formed in the cooking container, the food processing part extends into the food receiving cavity and rotates relative to the cooking container under the drive of the driving motor, and the power supply circuit of the food processor comprises: A rectifier bridge circuit, a first electrolytic capacitor, a second electrolytic capacitor, a switch circuit, a power port and an output port, wherein the output port is used to transmit voltage to the drive motor; The rectifier bridge circuit comprises a first output pin, a second output pin, a first input pin, and a second input pin, the first input pin and the second input pin are connected to the power port, the first output pin is connected to the output port, the first output pin is connected to the positive electrode of the first electrolytic capacitor, the second output pin is connected to the negative electrode of the second electrolytic capacitor, the positive electrode of the second electrolytic capacitor is connected to the negative electrode of the first electrolytic capacitor, and the switch circuit is connected between the negative electrode of the first electrolytic capacitor and the first input pin; The switching circuit connects the negative electrode of the first electrolytic capacitor and the first input pin when a power supply voltage of a first voltage value is input to the power port, and disconnects the negative electrode of the first electrolytic capacitor and the first input pin when a power supply voltage of a second voltage value is input to the power port, and the first voltage value is less than the second voltage value.

2. The food processor power supply circuit according to claim 1, characterized in that: The switch circuit includes a switch element, an MCU circuit connected to the switch element, and a power supply voltage detection circuit connected to the MCU circuit; The power supply voltage detection circuit is used to detect the voltage value of the power supply voltage; The MCU circuit is used for controlling the switch element to connect the negative electrode of the first electrolytic capacitor and the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is the first voltage value; The MCU circuit is used for controlling the switch element to disconnect the negative electrode of the first electrolytic capacitor from the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is the second voltage value.

3. The food processor power supply circuit according to claim 2, characterized in that: The MCU circuit includes an MCU chip, and the MCU chip includes a power supply voltage detection pin and a control signal output pin, the control signal output pin is connected to the switch element, and the power supply voltage detection pin is connected to the power supply voltage detection circuit.

4. The food processor power supply circuit according to claim 3, characterized in that: The power supply voltage detection circuit comprises: A detection power input port, a rectifier diode, a voltage-dividing resistor, a filter capacitor, and a detection signal output port, wherein the detection power input port is used to input the power supply voltage, the rectifier diode, the voltage-dividing resistor, and the filter capacitor are connected between the detection power input port and the detection signal output port, and the detection signal output port is connected to the power supply voltage detection pin.

5. The food processor power supply circuit according to any one of claims 1 to 4, characterized in that: The power port includes a live wire port and a neutral wire port, the live wire port is connected to the first input pin, and the neutral wire port is connected to the second input pin.

6. The food processor power supply circuit according to claim 1, characterized in that: The first voltage value is 110V, and the second voltage value is 220V.

7. A food processor control circuit, characterized in that: The food processor comprises a cooking container, a driving motor and a food processing part for processing food, wherein a food receiving cavity for containing food is formed in the cooking container, the food processing part extends into the food receiving cavity and rotates relative to the cooking container under the drive of the driving motor, and the food processor control circuit comprises: Food processor power supply circuit, IPM circuit, MCU circuit, and power supply voltage detection circuit; The food processor power supply circuit comprises a rectifier bridge circuit, a first electrolytic capacitor, a second electrolytic capacitor, a switch element, a power port and an output port, the rectifier bridge circuit comprises a first output pin, a second output pin, a first input pin and a second input pin, the first input pin and the second input pin are connected to the power port, the first output pin is connected to the output port, the first output pin is connected to the positive electrode of the first electrolytic capacitor, the second output pin is connected to the negative electrode of the second electrolytic capacitor, the positive electrode of the second electrolytic capacitor is connected to the negative electrode of the first electrolytic capacitor, and the switch element is connected between the negative electrode of the first electrolytic capacitor and the first input pin; The IPM circuit includes an IPM chip, the IPM chip includes a first power pin and a three-phase power output pin, the first power pin is connected to the output port, and the three-phase power output pin is used to output three-phase power to the drive motor; The power supply voltage detection circuit is used to detect the voltage value of the power supply voltage; The MCU circuit includes an MCU chip, the MCU chip includes a power supply voltage detection pin and a control signal output pin, the control signal output pin is connected to the switch element, and the power supply voltage detection pin is connected to the power supply voltage detection circuit; The MCU circuit is used to control the switch element to connect the negative electrode of the first electrolytic capacitor and the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is a first voltage value, and to control the switch element to disconnect the negative electrode of the first electrolytic capacitor and the first input pin when the power supply voltage detection circuit detects that the voltage value of the power supply voltage is a second voltage value, and the first voltage value is less than the second voltage value.

8. The food processor control circuit according to claim 7, characterized in that: The food processor control circuit further includes: a power switch circuit; The power switch circuit includes: a transformer, a switch power chip, a first voltage-stabilizing transistor, and a second voltage-stabilizing transistor; The transformer includes a primary winding, a secondary winding and a tertiary winding, the primary winding is used to input the power supply voltage, the primary winding is connected to the switching power supply chip, the secondary winding is connected to the pre-stabilization voltage input terminal of the first voltage-stabilizing transistor, the post-stabilization voltage output terminal of the first voltage-stabilizing transistor is a first voltage output port, the first voltage output port is connected to the pre-stabilization voltage input terminal of the second voltage-stabilizing transistor, the post-stabilization voltage output terminal of the second voltage-stabilizing transistor is a second voltage output port, the first voltage output port is connected to the IPM chip, and the second voltage output port is connected to the MCU chip.

9. The food processor control circuit according to claim 8, characterized in that: The MCU chip also includes: a heating control pin; The food processor control circuit further includes: a heating drive circuit; The heating drive circuit includes a thyristor rectifier and a driving optocoupler, the thyristor rectifier is used to be connected to the main line of the heating power supply, the driving optocoupler is connected to the heating control pin and the second voltage output port, and the driving optocoupler controls the thyristor rectifier to be turned on / off under the control of the heating control pin.

10. The food processor control circuit according to claim 8, characterized in that: The MCU chip also includes: a power supply zero-crossing detection pin; The food processor control circuit further includes: a power supply zero-crossing detection circuit; The power supply zero-crossing detection circuit includes a first detection power supply input port and a detection optocoupler, wherein the first detection power supply input port is used to connect to a power supply, and the detection optocoupler is connected to the second voltage output port and the power supply zero-crossing detection pin.

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