Food processor circuit and food processor comprising same
By introducing a transformer and a power circuit into the circuit of the cooking machine, the problem of mutual influence between the existing power circuits of the cooking machine is solved, and a more stable voltage output and higher circuit stability are achieved.
Patent Information
- Application Number
- CN202421011635.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The isolated power supply circuit of existing cooking machines and the non-isolated power supply circuit may affect each other, resulting in the inability to maintain the same voltage output under load and without load, affecting the working stability of the cooking machine.
By introducing transformers, isolation power circuits, and non -isolation power circuits in the cooking machine circuit, the isolated power circuit is connected to the power supply through the sub -border winding of the transformer. Essence
Effectively reduce the interaction between isolation power circuits and non -isolation power circuits, improve the stability of the circuit, and ensure that stable voltage output can be maintained under different load conditions.
Smart Images
Figure CN222395558U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of small household appliances, and in particular to a food processor circuit and a food processor including the same. Background Art
[0002] With the improvement of living standards, many different types of food processors have appeared on the market. The functions of food processors may mainly include, but are not limited to, making soy milk, squeezing juice, making rice paste, mincing meat, shaving ice, making coffee and / or preparing facial masks.
[0003] In order to meet the power requirements of different loads on a food processor, the food processor usually needs to have isolated voltage output and non-isolated voltage output. The power supply circuit of an existing food processor usually uses a combination of a transformer and a power chip, and outputs non-isolated voltage and isolated voltage respectively through the primary winding and secondary winding of the transformer. However, these two power supplies may affect each other, and the same voltage output cannot be maintained when loaded and unloaded, which is not conducive to the stability of the food processor. Utility Model Content
[0004] The present application provides a food processor circuit and a food processor including the same, which can reduce the mutual influence between the isolated power supply circuit and the non-isolated power supply circuit.
[0005] The present application provides a food processor circuit, which is applied to a food processor, including:
[0006] a first power receiving circuit and a second power receiving circuit;
[0007] A power conversion circuit, used to connect to a power source and convert the voltage output by the power source;
[0008] A transformer, comprising a primary winding and a secondary winding, wherein the primary winding is connected to an output end of the power conversion circuit;
[0009] an isolated power supply circuit, connected to the secondary winding of the transformer and the first power receiving circuit, and used for supplying power to the first power receiving circuit;
[0010] a rectifier and filter circuit, connected to the output end of the power conversion circuit, and used for converting the voltage output by the power conversion circuit; and
[0011] The non-isolated power supply circuit is connected to the output end of the rectifying and filtering circuit and the second power receiving circuit, and is used to supply power to the second power receiving circuit.
[0012] In some embodiments, the isolated power supply circuit is connected to the power supply through the secondary winding of the transformer, and the non-isolated power supply circuit is connected to the power supply through the rectifier and filter circuit, which can reduce the mutual influence between the isolated power supply circuit and the non-isolated power supply circuit and improve the stability of the circuit.
[0013] Optionally, the non-isolated power supply circuit includes a switching power supply, and the input end of the switching power supply is connected to the output end of the rectifier and filter circuit. In some embodiments, the switching power supply can efficiently adjust the output voltage of the non-isolated power supply circuit.
[0014] Optionally, the non-isolated power supply circuit includes a first resistor, a second resistor, a diode, a capacitor and an inductor, the first resistor is connected to the switching power supply and the cathode of the diode, the anode of the diode is connected to the output end of the non-isolated power supply circuit, one end of the capacitor is connected between the first resistor and the cathode of the diode, the other end of the capacitor is connected to the inductor, the other end of the inductor is connected to the output end of the non-isolated power supply circuit, one end of the second resistor is connected to the switching power supply, and the other end of the second resistor is connected between the capacitor and the inductor. In some embodiments, the non-isolated power supply circuit can output a non-isolated voltage to power the corresponding load.
[0015] Optionally, the food processor includes a three-phase brushless motor, the second power receiving circuit includes a motor drive circuit connected to the non-isolated power supply circuit and the three-phase brushless motor, the motor drive circuit includes a transistor drive circuit and a transistor, each phase of the three-phase brushless motor is connected to at least two of the transistors, and the transistor drive circuit connects the non-isolated power supply circuit and the transistor to drive the transistor. In some embodiments, the circuit cost can be reduced by driving the motor with a transistor drive circuit and a discrete transistor.
[0016] Optionally, at least two transistors connected to each phase of the three-phase brushless motor are connected to the same transistor drive circuit. In some embodiments, at least two transistors connected to each phase of the three-phase brushless motor are connected to the same transistor drive circuit, which can reduce circuit cost.
[0017] Optionally, the motor drive circuit includes a motor controller, the motor controller and the transistor drive circuit are integrated, and the motor is driven to work by the transistor. In some embodiments, the motor controller and the transistor drive circuit are integrated to reduce circuit elements, reduce circuit volume, and save space in the food processor.
[0018] Optionally, the food processor circuit further includes a voltage conversion circuit connected to the output end of the non-isolated power supply circuit and the motor controller, for converting the voltage output by the non-isolated power supply circuit and supplying power to the motor controller. In some embodiments, the voltage conversion circuit can provide a suitable power supply voltage for the motor controller.
[0019] Optionally, the food processor further includes a heating device, and the food processor circuit includes a heating circuit connected between the power conversion circuit and the heating device. In some embodiments, the heating device can heat food ingredients to enrich the functions of the food processor.
[0020] Optionally, the food processor circuit further includes a zero-crossing detection circuit and a relay, wherein the zero-crossing detection circuit is connected to the ground terminal of the power conversion circuit via the relay. In some embodiments, the zero-crossing detection circuit can detect the zero-crossing point of the power supply voltage, so that the controller can respond according to the change of the power supply voltage.
[0021] The present application provides a food processor, comprising: a main unit, a food processor cup assembly, and a food processor circuit as described in any one of the above items; the food processor cup assembly is disposed on the main unit.
[0022] Optionally, the isolated power supply circuit is disposed in the cooking cup assembly, and the non-isolated power supply circuit is disposed in the host.
[0023] In some embodiments, an isolated power supply circuit is disposed in the food processor cup assembly, and a non-isolated power supply circuit is disposed in the main unit, which can improve the safety of the food processor.
[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0026] Figure 1 Shown is a schematic structural diagram of an embodiment of a food processor of the present application.
[0027] Figure 2 Shown is a circuit diagram of an embodiment of a food processor circuit of the present application.
[0028] Figure 3 Shown is a circuit diagram of another embodiment of the food processor circuit of the present application.
[0029] Figure 4 Shown is a partial circuit block diagram of another embodiment of the food processor circuit of the present application.
[0030] Figure 5 Shown Figure 4 A partial circuit diagram of one embodiment of a blender circuit is shown.
[0031] Figure 6 Shown is a partial circuit block diagram of another embodiment of the food processor circuit of the present application. DETAILED DESCRIPTION
[0032] The present application provides a food processor circuit and a food processor including the same. The food processor circuit and the food processor including the same are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.
[0033] Figure 1 FIG. 1 is a schematic diagram of the structure of an embodiment of a food processor 10 of the present application. Figure 1 As shown, the food processor 10 includes: a main unit 11, a food processor cup assembly 12 and a food processor circuit 20 provided in the present application. The food processor cup assembly 12 is disposed on the main unit 11.
[0034] In some embodiments, the host 11 is in the form of a stand. The host 11 can provide electrical energy, control and drive the food processor 10 to work, and can interact with the user.
[0035] The cooking cup assembly 12 can be assembled to the main unit 11. In some embodiments, the cooking cup assembly 12 can be detachably mounted to the main unit 11. The cooking cup assembly 12 can hold ingredients for cooking. When the cooking cup assembly 12 is mounted to the main unit 11, the main unit 11 can control the cooking machine 10 to cook, such as whipping and heating the ingredients. Figure 1 This is only an exemplary embodiment of the food processor, and the present application is not limited to Figure 1 The food processor shown may be other types of food processors.
[0036] Figure 2 Shown is a circuit diagram of an embodiment of a food processor circuit 20 of the present application.
[0037] The food processor circuit 20 is applied to the food processor 10 . The food processor circuit 20 includes: a first power receiving circuit 21 , a second power receiving circuit 22 , a power conversion circuit 23 , a transformer 24 , an isolation power circuit 25 , a rectifier filter circuit 26 , and a non-isolation power circuit 27 .
[0038] The first power receiving circuit 21 and the second power receiving circuit 22 are used to receive and consume electric energy, and can be connected to a load to transmit electric energy to the load. The first power receiving circuit 21 and the second power receiving circuit 22 can have the same or different voltage, current and power requirements, and the first power receiving circuit 21 and the second power receiving circuit 22 can be powered by different power supply circuits. In some embodiments, the first power receiving circuit 21 is used to connect a lighting device, such as a light panel. The second power receiving circuit 22 is used to connect a power device, such as a drive motor.
[0039] The power conversion circuit 23 is used to connect to the power supply 30 and convert the voltage output by the power supply 30. In some embodiments, the power supply 30 includes a mains supply. The power conversion circuit 23 can convert the voltage of the power supply 30 into the voltage required by the food processor 10.
[0040] The transformer 24 includes a primary winding 241 and a secondary winding 242. The transformer 24 can convert voltage. The primary winding 241 is connected to the output end of the power conversion circuit 23 and receives the voltage converted by the power conversion circuit 23. The secondary winding 242 outputs the voltage converted by the transformer 24. According to the design of the number of turns of the primary winding 241 and the secondary winding 242, the voltage output by the secondary winding 242 may be higher, lower or equal to the voltage of the primary winding 241.
[0041] The isolation power supply circuit 25 is connected to the secondary winding 242 of the transformer 24 and the first power receiving circuit 21, and is used to supply power to the first power receiving circuit 21. The isolation power supply circuit 25 is used to provide an isolation voltage and has an electrical isolation function. The isolation power supply circuit 25 completely isolates the electric energy output by the secondary winding 242 of the transformer 24 from the power supply 30 and other circuit parts. The isolation power supply circuit 25 supplies the electric energy output by the secondary winding 242 to the first power receiving circuit 21, so that the first power receiving circuit 21 operates in a safe and stable environment.
[0042] The rectifier and filter circuit 26 is connected to the output end of the power conversion circuit 23 and is used to convert the voltage output by the power conversion circuit 23. The rectifier and filter circuit 26 rectifies and filters the voltage output by the power conversion circuit 23 to obtain a more stable voltage. In some embodiments, the rectifier and filter circuit 26 outputs a 310V DC voltage.
[0043] The non-isolated power supply circuit 27 is connected to the output end of the rectifier and filter circuit 26 and the second power receiving circuit 22, and is used to supply power to the second power receiving circuit 22. The non-isolated power supply circuit 27 is used to provide a non-isolated voltage, and is suitable for electrical equipment that does not require high electrical isolation. The non-isolated power supply circuit 27 is directly connected to the output end of the rectifier and filter circuit 26, and supplies the output voltage of the rectifier and filter circuit 26 to the second power receiving circuit 22.
[0044] In some embodiments, the isolated power supply circuit 25 is connected to the power supply 30 through the secondary winding 242 of the transformer 24, and the non-isolated power supply circuit 27 is connected to the power supply 30 through the rectifier and filter circuit 26. The isolated power supply circuit 25 and the non-isolated power supply circuit 27 are not connected to the same transformer 24, which can reduce the mutual influence between the output voltages of the isolated power supply circuit 25 and the non-isolated power supply circuit 27, reduce electromagnetic interference, and improve the stability of the circuit.
[0045] In some embodiments, the isolated power circuit 25 is disposed in the cooking cup assembly 12, and the non-isolated power circuit 27 is disposed in the host 11. The cooking cup assembly 12 may be in direct contact with the user, and the isolated power circuit 25 is disposed in the cooking cup assembly 12 to provide an isolated voltage for the cooking cup assembly 12, and the non-isolated power circuit 27 is disposed in the host 11 that the user does not often contact, so that the user can avoid contact with dangerous high voltage during the operation of the cooking machine 10, and such a configuration can improve the safety of the cooking machine 10.
[0046] Figure 3 Shown is a circuit diagram of another embodiment of the food processor circuit 20 of the present application.
[0047] The non-isolated power supply circuit 27 includes a switching power supply IC5. The input end of the switching power supply IC5 is connected to the output end of the rectifier filter circuit 26. Figure 3 In the embodiment shown, the rectifier filter circuit 26 outputs a 310V DC voltage, which is connected to the input end of the switching power supply IC5. The non-isolated power supply circuit 27 outputs a 15V DC non-isolated voltage. The switching power supply IC5 can quickly adjust the output voltage and current according to actual needs to meet the working requirements of different loads. In some embodiments, the switching power supply IC5 can efficiently adjust the output voltage of the non-isolated power supply circuit 27.
[0048] The non-isolated power supply circuit 27 includes a first resistor R1, a second resistor R2, a diode D1, a capacitor C1 and an inductor L1. The first resistor R1 is connected to the cathode of the switching power supply IC5 and the diode D1. The anode of the diode D1 is connected to the output end of the non-isolated power supply circuit 27, one end of the capacitor C1 is connected between the cathode of the first resistor R1 and the diode D1, the other end of the capacitor C1 is connected to the inductor L1, the other end of the inductor L1 is connected to the output end of the non-isolated power supply circuit 27, one end of the second resistor R2 is connected to the switching power supply IC5, and the other end of the second resistor R2 is connected between the capacitor C1 and the inductor L1. The switching power supply IC5 can adjust the switching frequency and duty cycle according to the output voltage detected by it, and adjust the output voltage of the non-isolated power supply circuit 27. The first resistor R1 and the second resistor R2 play a voltage dividing role. The diode D1 is used to release the energy of the inductor L1. The capacitor C1 is used to smooth the output voltage and reduce the noise caused by the switch operation. In some embodiments, the non-isolated power supply circuit 27 can output a non-isolated voltage to power the corresponding load.
[0049] Figure 4 Shown is a partial circuit block diagram of another embodiment of the food processor circuit 20 of the present application.
[0050] The food processor 10 includes a three-phase brushless motor 13. The second power receiving circuit 22 includes a motor drive circuit 221, which is connected to a non-isolated power supply circuit 27 and the three-phase brushless motor 13. The motor drive circuit 221 includes a transistor drive circuit 222 and a transistor 223. Each phase of the three-phase brushless motor 13 is connected to at least two transistors 223, and the transistor drive circuit 222 is connected to the non-isolated power supply circuit 27 and the transistor 223 to drive the transistor 223. The three-phase brushless motor 13 does not have a carbon brush, and has a longer service life than a brushed motor. The transistor drive circuit 222 is responsible for receiving electrical energy from the non-isolated power supply circuit 27 and driving the switching state of the transistor 223 according to a control signal. The transistor 223 acts as an actuator of the motor drive circuit 221 and directly controls the operation of the three-phase brushless motor 13. The transistor 223 includes an IGBT. In some embodiments, the transistor 223 is powered by a 310V voltage output by the rectifier filter circuit 26. At least two transistors 223 are connected to each phase of the three-phase brushless motor 13. By controlling each phase of the motor together with two transistors 223, the three-phase brushless motor 13 can be more accurately controlled. The transistor 223 has a low cost. In some embodiments, the motor is driven by the transistor driving circuit 222 and the discrete transistor 223, which can reduce the circuit cost.
[0051] Figure 5 Shown Figure 4 A partial circuit diagram of an embodiment of a blender circuit 20 is shown. Figure 5 In the illustrated embodiment, the transistor 223 comprises a field effect transistor. Each phase of the three-phase brushless motor 13 is connected between the drain and source of two field effect transistors.
[0052] At least two transistors 223 connected to each phase of the three-phase brushless motor 13 are connected to the same transistor drive circuit 222. In some embodiments, at least two transistors 223 connected to each phase of the three-phase brushless motor 13 are connected to the same transistor drive circuit 222, which can reduce circuit complexity and circuit cost.
[0053] Figure 6 Shown is a partial circuit block diagram of another embodiment of the food processor circuit 20 of the present application.
[0054] The motor driving circuit 221 includes a motor controller 224. The motor controller 224 is connected to the transistor 223 and drives the motor to work through the transistor 223. The motor controller 224 is responsible for generating control signals, and the transistor driving circuit 222 drives the switch state of the transistor 223 according to these control signals, thereby controlling the motor to work. In some embodiments, the motor driving circuit 221 also includes a peripheral circuit connected to the motor controller 224.
[0055] exist Figure 4In the illustrated embodiment, the motor controller 224 and the transistor driving circuit 222 are separately arranged, so as to facilitate circuit maintenance and component replacement.
[0056] exist Figure 6 In the illustrated embodiment, the motor controller 224 and the transistor drive circuit 222 are integrated. This can reduce circuit elements, reduce circuit volume, and save space in the food processor 10. In addition, since the connections and interfaces of the circuit are reduced, the reliability and stability of the circuit as a whole are also improved. In some embodiments, the circuit board in which the motor controller 224 and the transistor drive circuit 222 are integrated is used, and the length and width are reduced compared to the separate arrangement of the motor controller 224 and the transistor drive circuit 222. In some embodiments, space can be further saved by laying out the PCB board in a circular, semicircular or irregular shape.
[0057] In some embodiments, the food processor circuit 20 includes a voltage conversion circuit connected to the output end of the non-isolated power supply circuit 27 and the motor controller 224, for converting the voltage output by the non-isolated power supply circuit 27 and supplying power to the motor controller 224. In some embodiments, the voltage conversion circuit converts the 15V non-isolated voltage output by the non-isolated power supply circuit 27 into a 5V non-isolated voltage, and provides it to the motor controller 224, thereby providing the motor controller 224 with a suitable power supply voltage.
[0058] In some embodiments, the food processor 10 includes a heating device, and the food processor circuit 20 includes a heating circuit, which is connected between the power conversion circuit 23 and the heating device. The heating circuit can convert the electric energy output by the power conversion circuit 23 into electric energy suitable for the needs of the heating device to ensure that the heating device can work according to a predetermined temperature and time. In some embodiments, the heating device can heat the ingredients to enrich the functions of the food processor 10. In some embodiments, the heating device includes a heating tube. The heating circuit is designed separately from the motor drive circuit 221 to control the operation of the heating device and the motor respectively. In this way, the heating and stirring / cutting operations of the food processor 10 can be performed independently, or they can be run simultaneously as needed to meet different cooking needs.
[0059] In some embodiments, the food processor circuit 20 includes a zero-crossing detection circuit and a relay, and the zero-crossing detection circuit is connected to the ground terminal of the power conversion circuit 23 through the relay. In some embodiments, the zero-crossing detection circuit can detect the zero-crossing point of the power supply voltage, so that the controller of the food processor 10 can respond according to the change of the power supply voltage. The controller of the food processor 10 can accurately control the working state of the food processor 10 according to the received zero-crossing signal. For example, the switching of the switch is triggered at each zero point.
Claims
1. A food processor circuit, applied to a food processor, characterized in that: include: a first power receiving circuit and a second power receiving circuit; A power conversion circuit, used to connect to a power source and convert the voltage output by the power source; A transformer, comprising a primary winding and a secondary winding, wherein the primary winding is connected to an output end of the power conversion circuit; an isolated power supply circuit, connected to the secondary winding of the transformer and the first power receiving circuit, and used for supplying power to the first power receiving circuit; a rectifier and filter circuit, connected to the output end of the power conversion circuit, and used for converting the voltage output by the power conversion circuit; and The non-isolated power supply circuit is connected to the output end of the rectifying and filtering circuit and the second power receiving circuit, and is used to supply power to the second power receiving circuit.
2. The food processor circuit according to claim 1, characterized in that: The non-isolated power supply circuit comprises a switching power supply, and an input end of the switching power supply is connected to an output end of the rectifying and filtering circuit.
3. The food processor circuit according to claim 2, characterized in that: The non-isolated power supply circuit includes a first resistor, a second resistor, a diode, a capacitor and an inductor. The first resistor is connected to the switching power supply and the cathode of the diode, the anode of the diode is connected to the output end of the non-isolated power supply circuit, one end of the capacitor is connected between the first resistor and the cathode of the diode, the other end of the capacitor is connected to the inductor, the other end of the inductor is connected to the output end of the non-isolated power supply circuit, one end of the second resistor is connected to the switching power supply, and the other end of the second resistor is connected between the capacitor and the inductor.
4. The food processor circuit according to claim 1, characterized in that: The food processor includes a three-phase brushless motor, the second power receiving circuit includes a motor drive circuit connected to the non-isolated power supply circuit and the three-phase brushless motor, the motor drive circuit includes a transistor drive circuit and a transistor, each phase of the three-phase brushless motor is connected to at least two of the transistors, and the transistor drive circuit is connected to the non-isolated power supply circuit and the transistor for driving the transistor.
5. The food processor circuit according to claim 4, characterized in that: At least two transistors connected to each phase of the three-phase brushless motor are connected to the same transistor driving circuit.
6. The food processor circuit according to claim 4, characterized in that: The motor driving circuit includes a motor controller, which is integrated with the transistor driving circuit and drives the motor to work through the transistor.
7. The food processor circuit according to claim 6, characterized in that: The food processor circuit also includes a voltage conversion circuit connected to the output end of the non-isolated power supply circuit and the motor controller, for converting the voltage output by the non-isolated power supply circuit and supplying power to the motor controller.
8. The food processor circuit according to claim 1, characterized in that: The food processor further comprises a heating device, and the food processor circuit comprises a heating circuit connected between the power conversion circuit and the heating device; and / or The food processor circuit also includes a zero-crossing detection circuit and a relay, and the zero-crossing detection circuit is connected to the ground terminal of the power conversion circuit through the relay.
9. A food processor, characterized in that: include: A main unit, a cooking cup assembly and a cooking machine circuit as described in any one of claims 1 to 8; the cooking cup assembly is arranged on the main unit.
10. The food processor according to claim 9, characterized in that: The isolated power supply circuit is arranged in the cooking cup assembly, and the non-isolated power supply circuit is arranged in the host.