Food processor circuit and food processor comprising same
By designing a cooking machine circuit including a power supply terminal, a thyristor, a phase shift circuit, a bidirectional diode and a second capacitor in the cooking machine, the large thyristor conduction error and low-speed speed regulation in the prior art are solved. Problem, achieving higher controllability and lower error.
Patent Information
- Application Number
- CN202420308521.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-19
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-19
AI Technical Summary
In existing cooking machines, when the motor speed is controlled by Thyristor, the conduction error is large, especially when the speed is adjusted at low speed, the Thyristor is prone to instability in conduction.
A cooking machine circuit including a power supply terminal, a thyristor, a phase shift circuit, a bidirectional diode and a second capacitor are designed. The voltage loaded to the thyristor is slower through the phase shifting circuit, the bidirectional diode controls the conduction of the thyristor, and the second capacitor is combined with the phase shifting circuit to reduce the slope of the voltage change and improve the controllability of the thyristor.
At low speed state, the motor speed can be adjusted slowly, reducing the error of thyristor speed regulation and improving the controllability of thyristor.
Smart Images
Figure CN222531561U_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] Generally, the motor of the food processor is controlled by a thyristor. The motor speed is adjusted by controlling the conduction time of the thyristor. However, in the prior art, the conduction error of the thyristor is large, and when the motor is adjusted at a low speed, the thyristor is prone to unstable conduction. Utility Model Content
[0004] The present application provides a food processor circuit capable of reducing errors and a food processor including the same.
[0005] The present application provides a food processor circuit, which is applied to a food processor. The food processor includes a motor. The food processor circuit includes:
[0006] A power supply terminal, including a first power supply terminal and a second power supply terminal;
[0007] The thyristor comprises a first end, a second end and a controlled end, wherein the first end is connected to the first power supply end, the second end is connected to the second power supply end, and the motor is connected to the first end or the second end;
[0008] a phase shift circuit, connected to the first end and the second end, the phase shift circuit comprising a first capacitor and a first resistor connected in series;
[0009] a bidirectional diode, one end of which is connected to the controlled end, and the other end of which is connected between the first capacitor and the first resistor; and
[0010] The second capacitor connects the first end and the second end.
[0011] In some embodiments, the thyristor includes a first end, a second end and a controlled end, the phase shift circuit includes a first capacitor and a first resistor connected in series, one end of the bidirectional diode is connected to the controlled end of the thyristor, and the other end is connected between the first capacitor and the first resistor, the second capacitor is connected to the first end and the second end of the thyristor, when the first capacitor is charged to reach the conduction voltage of the bidirectional diode, the bidirectional diode is turned on, the thyristor is turned on, and the phase shift circuit makes the voltage loaded to the thyristor change more slowly, so that the motor speed can be slowly adjusted at a low speed, thereby improving the controllability of the thyristor and reducing the error of the thyristor speed regulation.
[0012] Optionally, the food processor circuit includes a variable resistor, connecting the second capacitor and the thyristor. In some embodiments, the voltage loaded to the second capacitor and the phase shift circuit can be easily changed by adjusting the variable resistor, thereby changing the conduction time of the thyristor.
[0013] Optionally, the variable resistor includes a potentiometer. In some embodiments, the potentiometer is simple and convenient to operate.
[0014] Optionally, the food processor circuit includes a second resistor, which connects the thyristor and the variable resistor. In some embodiments, the second resistor plays a voltage dividing role to prevent the voltage loaded on the thyristor from being too high.
[0015] Optionally, the food processor circuit includes a switch, and the switch connects the thyristor and the first power supply terminal. In some embodiments, the switch can control the on-off of the thyristor and the power supply terminal, so as to facilitate the control of the operation of the thyristor.
[0016] Optionally, the switch includes a switching switch, and the switching switch switches between the thyristor and an open circuit. In some embodiments, the switching switch can automatically switch the circuit to improve the safety of the circuit.
[0017] Optionally, the food processor circuit includes a rectifier circuit connected to the motor and the power supply terminal. In some embodiments, the rectifier circuit converts the alternating current at the power supply terminal into direct current to power the motor.
[0018] Optionally, the food processor circuit includes a third capacitor connected in parallel with the motor. In some embodiments, the third capacitor can absorb the reverse voltage when the motor is started to protect the motor.
[0019] Optionally, the food processor circuit includes an inductor, and the inductor is connected in series with the motor. In some embodiments, the inductor can absorb electromagnetic interference and improve the stability of the food processor circuit.
[0020] The present application also provides a food processor, comprising:
[0021] Motors; and
[0022] The food processor circuit as described in any of the above items is electrically connected to the motor.
[0023] 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
[0024] 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.
[0025] Figure 1 Shown is a longitudinal cross-sectional view of an embodiment of a food processor of the present application.
[0026] Figure 2 Shown Figure 1 Partial circuit diagram of the food processor shown.
[0027] Figure 3 Shown is a voltage diagram of a thyristor without a phase shift circuit applied.
[0028] Figure 4 The figure shows the voltage diagram of a thyristor with a phase shift circuit applied. DETAILED DESCRIPTION
[0029] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.
[0030] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.
[0031] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0032] The food processor circuit of the embodiment of the present application is applied to a food processor. The food processor includes a motor. The food processor circuit includes: a power supply end, a thyristor, a phase shift circuit, a bidirectional diode and a second capacitor. The power supply end includes a first power supply end and a second power supply end. The thyristor includes a first end, a second end and a controlled end. The first end is connected to the first power supply end, the second end is connected to the second power supply end, and the motor is connected to the first end or the second end. The phase shift circuit connects the first end and the second end. The phase shift circuit includes a first capacitor and a first resistor connected in series. One end of the bidirectional diode is connected to the controlled end, and the other end of the bidirectional diode is connected between the first capacitor and the first resistor. The second capacitor connects the first end and the second end. The present application can slowly adjust the motor speed in a low speed state, improve the controllability of the thyristor, and reduce the error of the thyristor speed regulation.
[0033] 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.
[0034] Figure 1 The longitudinal cross-sectional view of an embodiment of a food processor 10 of the present application is shown. The food processor 10 includes a main machine 11, a blending cup assembly 12 and a cup cover assembly 13. In the illustrated embodiment, the main machine 11 is in the form of a machine base, and the blending cup assembly 12 is detachably mounted on the main machine 11.
[0035] The food processor 10 includes a motor 21. In the illustrated embodiment, the motor 21 is disposed inside the main machine 11. The motor 21 is connected to the stirring blade assembly 15 to drive the stirring blade assembly 15 to rotate. The stirring blade assembly 15 can be installed at the bottom of the stirring cup assembly 12. In another embodiment, the main machine 11 is integrated into the cup cover assembly 13, and the stirring blade assembly 15 extends downward from the cup cover assembly 13 into the bottom of the stirring cup assembly 12. The stirring blade assembly 15 whips the ingredients in the stirring cup assembly 12. In another embodiment, the food processor 10 is a handheld food processor, and the motor 21 is disposed inside the main machine of the handheld food processor and is connected to the stirring blade assembly 15 to whip the ingredients.
[0036] The mixing cup assembly 12 contains food materials, in which the food materials are whipped, heated, cooled, etc. The cup body of the mixing cup assembly 12 can be made of glass, metal (such as stainless steel), etc. The cup cover assembly 13 is detachably covered on the mixing cup assembly 12. The cup cover assembly 13 can be sealed on the mixing cup assembly 12 to form a closed space with the mixing cup assembly 12.
[0037] In some embodiments, the food processor 10 further includes a heating plate 22. The heating plate 22 is mounted on the bottom of the blender cup assembly 12 to heat the food. The blender blade assembly 15 can pass through and be fixed to the heating plate 22. In one embodiment, the heating plate 22 can be heated by a heating tube, and the heating plate 22 transfers the heat to the food. In another embodiment, the heating plate 22 can be electromagnetically heated, including a coil and an electromagnetic disk. A temperature sensor 23 can be installed on the heating plate 22 to sense the temperature inside the food processor 10. The temperature sensor 23 extends into the blender cup assembly 12 to detect the temperature of the food. In one embodiment, the temperature sensor 23 includes a thermistor. In one embodiment, the thermistor includes a negative temperature coefficient (NTC) thermistor.
[0038] 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.
[0039] Figure 2 Shown Figure 1 The food processor 10 is a partial circuit diagram of the food processor 10. The food processor circuit 30 is applied to the food processor 10. The food processor 10 includes the food processor circuit 30, which is electrically connected to the motor 21. The food processor circuit 30 is used to control the motor 21. In one embodiment, the host 11 includes a control board, and the food processor circuit 30 is disposed on the control board.
[0040] The food processor circuit 30 includes a power supply terminal 31 , a thyristor SCR, a phase shift circuit 32 , a bidirectional diode D1 and a second capacitor C2 .
[0041] The power supply terminal 31 includes a first power supply terminal L and a second power supply terminal N. The power supply terminal 31 is used to connect to an AC power supply. The first power supply terminal L is used to connect to a live wire of the AC power supply, and the second power supply terminal N is used to connect to a neutral wire of the AC power supply. In one embodiment, the AC power supply includes a mains supply.
[0042] The thyristor SCR is connected in series with the motor 21 and is connected to the power supply terminal 31. The thyristor SCR includes a first terminal T1, a second terminal T2 and a controlled terminal T3. The first terminal T1 is connected to the first power supply terminal L, the second terminal T2 is connected to the second power supply terminal N, and the motor 21 is connected to the first terminal T1 or the second terminal T2. The thyristor SCR can control the driving motor 21. When the thyristor SCR is turned on, the motor 21 is connected to the power supply terminal 31, the power supply terminal 31 is able to supply power to the motor 21, and the motor 21 is driven to work. When the thyristor SCR is turned off, the motor 21 is disconnected from the power supply terminal 31, and the power supply terminal 31 stops supplying power to the motor 21. In one embodiment, the thyristor SCR includes a bidirectional thyristor device.
[0043] The phase shift circuit 32 connects the first terminal T1 and the second terminal T2. The phase shift circuit 32 includes a first capacitor C1 and a first resistor R1 connected in series. The phase shift circuit 32 is connected in series with the thyristor SCR. When the food processor circuit 30 is working, the AC voltage of the power supply terminal 31 is loaded on the phase shift circuit 32. In the positive half cycle of the AC voltage, since the voltage across the first capacitor C1 cannot change suddenly but can only increase slowly, the first resistor R1 continuously charges the first capacitor C1, and the voltage amplitude increases with the increase of the AC voltage.
[0044] One end of the bidirectional diode D1 is connected to the controlled terminal T3, and the other end of the bidirectional diode D1 is connected between the first capacitor C1 and the first resistor R1. The bidirectional diode D1 controls the conduction of the controlled terminal T3. When the bidirectional diode D1 has a conduction voltage. When the voltage loaded to the bidirectional diode D1 reaches its conduction voltage, the bidirectional diode D1 will be turned on, thereby outputting a pulse to the controlled terminal T3, so that the thyristor SCR is turned on. The voltage of the bidirectional diode D1 is controlled by the phase shift circuit 32. When the first capacitor C1 is charged to reach the conduction voltage of the bidirectional diode D1, the bidirectional diode D1 is turned on.
[0045] The second capacitor C2 is connected to the first terminal T1 and the second terminal T2. The second capacitor C2 is connected to the power supply terminal 31. The voltage across the second capacitor C2 cannot change suddenly, and the voltage amplitude increases slowly as the AC voltage rises. The second capacitor C2 and the phase shift circuit 32 cause the voltage loaded to the thyristor SCR to shift phase, thereby reducing the voltage change slope.
[0046] Figure 3 FIG. 1 is a voltage diagram of a thyristor SCR without the phase shift circuit 32 . Figure 4 The figure shows the voltage diagram of the thyristor SCR using the phase shift circuit 32. The horizontal axis is time and the vertical axis is voltage. Curve A is the voltage of the power supply terminal 31, and curve B is the voltage of the thyristor SCR. It can be seen that Figure 4The phase of the voltage of the thyristor SCR is later, and the amplitude changes more slowly. When the thyristor SCR is turned on, if the voltage slope is large and the rate of change is too fast, the thyristor SCR may have large errors and unstable conduction. Reducing the voltage slope can reduce the conduction error of the thyristor SCR, slowly adjust the speed of the motor 21 at low speed, improve the controllability of the thyristor SCR, and reduce the error of the thyristor SCR speed regulation.
[0047] In some embodiments, the food processor circuit 30 includes a variable resistor Rw, which is connected to the second capacitor C2 and the thyristor SCR. The variable resistor Rw includes a first end, a second end, and an adjustable end, the first end is connected to the first power supply terminal L, and the adjustable end is connected to the second capacitor C2. The adjustable end can move between the first end and the second end, so that the resistance value of the variable resistor Rw connected to the circuit changes, thereby changing the voltage value output by the adjustable end. By adjusting the variable resistor Rw, the voltage loaded to the second capacitor C2 and the phase shift circuit 32 can be easily changed, thereby changing the conduction time of the thyristor SCR. In some embodiments, the resistance of the variable resistor Rw is 500kΩ.
[0048] In some embodiments, the variable resistor Rw includes a potentiometer. A potentiometer is a type of variable resistor, which is usually composed of a resistor body and a rotating or sliding system, that is, a moving contact moves on the resistor body to obtain a partial voltage output. A potentiometer is usually composed of a resistor body and a movable brush. When the brush moves along the resistor body, a resistance value or voltage that is related to the displacement is obtained at the output end. In the process of adjusting the variable resistor Rw, the brush moves with the movement of the adjustable end, thereby changing the voltage value output by the adjustable end. The potentiometer is simple and convenient to operate.
[0049] In some embodiments, the food processor circuit 30 includes a second resistor R2, which is connected to the thyristor SCR and the variable resistor Rw. The second resistor plays a voltage dividing role to prevent the voltage loaded by the thyristor from being too high.
[0050] In some embodiments, the food processor circuit includes a switch 33, and the switch 33 connects the thyristor SCR and the first power supply terminal L. The switch 33 can control the on-off of the thyristor SCR and the power supply terminal 31, so as to facilitate the control of the operation of the thyristor SCR. When an abnormality occurs, the switch 33 can be controlled to be disconnected, so that the thyristor SCR is powered off, thereby preventing the thyristor SCR from being damaged and improving the controllability and safety of the circuit.
[0051] In some embodiments, the switch 33 includes a switching switch, which switches between the thyristor SCR and an open circuit. In some embodiments, the switching switch includes a relay. The moving contact of the relay is connected to the first power supply terminal L, one static contact of the relay is connected to the thyristor SCR, and the other static contact is open. The relay can be set to automatically switch as the external electrical conditions change. When an abnormality occurs, the relay can automatically switch to an open circuit to cut off the power to the thyristor SCR. The switching switch can automatically switch the circuit to improve the safety of the circuit.
[0052] In some embodiments, the food processor circuit 30 includes a rectifier circuit 34, which is connected to the motor 21 and the power supply terminal 31. The motor 21 is a DC motor. The input end of the rectifier circuit 34 is connected to the power supply terminal 31, and the output end is connected to the motor 21. The rectifier circuit 34 converts the AC power of the power supply terminal 31 into DC power to supply power to the motor 21.
[0053] In some embodiments, the food processor circuit 30 includes a third capacitor C3 connected in parallel with the motor 21. The third capacitor C3 can absorb the reverse voltage when the motor 21 is started, so as to protect the motor 21.
[0054] In some embodiments, the food processor circuit 30 includes an inductor L1, which is connected in series with the motor 21. The inductor L1 can absorb electromagnetic interference and improve the stability of the food processor circuit 30.
[0055] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.
[0056] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.
Claims
1. A food processor circuit, applied to a food processor (10), the food processor (10) comprising a motor (21), characterized in that: include: A power supply terminal (31), comprising a first power supply terminal and a second power supply terminal; The thyristor comprises a first end, a second end and a controlled end, wherein the first end is connected to the first power supply end, the second end is connected to the second power supply end, and the motor (21) is connected to the first end or the second end; A phase shift circuit (32) connected to the first end and the second end, the phase shift circuit (32) comprising a first capacitor and a first resistor connected in series; a bidirectional diode, one end of which is connected to the controlled end, and the other end of which is connected between the first capacitor and the first resistor; and The second capacitor connects the first end and the second end.
2. The food processor circuit according to claim 1, characterized in that: The food processor circuit (30) comprises a variable resistor connected to the second capacitor and the thyristor.
3. The food processor circuit according to claim 2, characterized in that: The variable resistor includes a potentiometer.
4. The food processor circuit according to claim 2, characterized in that: The food processor circuit (30) comprises a second resistor connected to the thyristor and the variable resistor.
5. The food processor circuit according to claim 1, characterized in that: The food processor circuit (30) comprises a switch (33), and the switch (33) is connected to the thyristor and the first power supply terminal.
6. The food processor circuit according to claim 5, characterized in that: The switch (33) comprises a changeover switch, and the changeover switch switches between the thyristor and an open circuit.
7. The food processor circuit according to claim 1, characterized in that: The food processor circuit (30) comprises a rectifier circuit (34) connected to the motor (21) and the power supply end.
8. The food processor circuit according to claim 1, characterized in that: The food processor circuit (30) comprises a third capacitor connected in parallel with the motor (21).
9. The food processor circuit according to claim 1, characterized in that: The food processor circuit (30) comprises an inductor, which is connected in series with the motor (21).
10. A food processor, characterized in that: include: Motor (21); and The food processor circuit (30) according to any one of claims 1 to 9, electrically connected to the motor (21).