CN218105603U - Food processer power supply circuit and food processer - Google Patents

Abstract

The application provides a cooking machine power supply circuit and cooking machine. Cooking machine supply circuit includes: a power input terminal comprising a first power input terminal and a second power input terminal; the capacitor is electrically connected to the power input end; the discharge circuit is connected with the capacitor in parallel and comprises a switch and a discharge resistor which are connected in series; the zero-crossing detection circuit is electrically connected with the power input end, detects the electric signal on the power input end and outputs a corresponding zero-crossing signal; the controller comprises a detection port and a control port, the detection port is electrically connected to the zero-crossing detection circuit, the control port is electrically connected to the switch, the controller receives a zero-crossing signal through the detection port, when the zero-crossing signal indicates that the power input end is electrically connected with the power supply, the controller controls the switch to be disconnected through the control port, and when the zero-crossing signal indicates that the power input end is disconnected with the power supply, the controller controls the switch to be connected through the control port. This application can locate electric capacity quick discharge to cooking machine power, and can reduce circuit cost.

Description

Food processer power supply circuit and food processer

Technical Field

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

Background

With the increasing living standard of people, many different types of food processors appear on the market. The functions of the food processor mainly include, but are not limited to, functions of making soybean milk, squeezing fruit juice, making rice paste, mincing meat, shaving ice, making coffee and/or blending facial masks and the like. The food processor can comprise a soybean milk machine, a stirrer or a wall breaking food processor and other machines for crushing and stirring food materials.

In order to meet the safety requirement of anti-electromagnetic interference, a capacitor is connected between the power input ends of the food processor, but when the food processor is powered off, the capacitor can have residual voltage, and in order to release the residual voltage, a special discharge IC chip such as CAPZero-2 is usually used, but the cost is high.

SUMMERY OF THE UTILITY MODEL

The application provides a less cooking machine power supply circuit of cost and cooking machine.

The application provides cooking machine supply circuit includes:

a power input terminal including a first power input terminal and a second power input terminal for electrically connecting with a power supply;

a capacitor electrically connected between the first power input terminal and the second power input terminal;

a discharge circuit connected in parallel with the capacitor, the discharge circuit including a switch and a discharge resistor connected in series;

the zero-crossing detection circuit is electrically connected with the power supply input end and is used for detecting an electric signal on the power supply input end and outputting a corresponding zero-crossing signal; and

the controller comprises a detection port and a control port, the detection port is electrically connected with the zero-crossing detection circuit, the control port is electrically connected with the switch, the controller receives the zero-crossing signal through the detection port, when the zero-crossing signal indicates that the power input end is electrically connected with the power supply, the controller controls the switch to be disconnected through the control port, and when the zero-crossing signal indicates that the power input end is disconnected with the power supply, the controller controls the switch to be connected through the control port.

In some embodiments, the discharge circuit is connected in parallel with the capacitor and includes a switch that controls the discharge circuit to be turned on or off and a discharge resistor that discharges the capacitor. The controller is electrically connected with the switch and controls the switch to be switched on or switched off. Zero cross detection circuit is connected with power input end electricity, can detect whether power input end is connected with the power, and when detecting power input end and power disconnection, controller control switch switches on, and switch, discharge resistance form the return circuit with the electric capacity this moment, so can realize the quick discharge of electric capacity to the protection cooking machine. The cost of zero cross detection circuit, discharge circuit and controller is lower, can effectively reduce cooking machine power supply circuit's cost.

Optionally, the switch includes a thyristor, the thyristor includes a first pole, a second pole and a control pole, the first pole and the second pole are connected in series with the discharge resistor, and the control port is electrically connected to the control pole. In some embodiments, the controller can control the on or off of the controllable silicon through the control port, and the circuit is simple and low in cost.

Optionally, the thyristor comprises a bidirectional thyristor. In some embodiments, the bidirectional thyristor can be conducted in two directions, and can complete discharge no matter how the voltage direction of the capacitor is, so that the discharge of the capacitor can be effectively realized, the safety of a circuit is ensured, fewer components are used, and the cost is reduced.

Optionally, the discharge circuit includes a driving resistor, and the driving resistor is electrically connected between the switch and the control port. In some embodiments, the driving resistor is arranged to effectively control the on-off of the switch, so that the stability of the circuit is enhanced.

Optionally, the zero-cross detection circuit includes a detection resistor, and the detection resistor is electrically connected between the first power input end and the detection port. In some embodiments, the detection resistor can detect whether the power supply of the food processor is connected or not and returns an electric signal to the detection port of the controller, and the circuit is simple and low in cost.

Optionally, the food processor power supply circuit includes power supply circuit, power supply circuit with the power input end electricity is connected, power supply circuit includes non-isolation power supply circuit, the controller includes controller power end and controller earthing terminal, the controller power end with the controller earthing terminal respectively with non-isolation power supply circuit electricity is connected. In some embodiments, a non-isolated power circuit is used to supply power to the controller, and a control port of the controller can be directly connected with the switch, so that the circuit is simple and low in cost.

Optionally, the capacitor and the discharge circuit are electrically connected between the power input terminal and the power circuit. In some embodiments, the capacitor and the discharge circuit are arranged in front of the input end of the power supply circuit, so that the influence of the power supply circuit can be reduced or avoided, and the food processor power supply circuit can be better protected.

Optionally, the food processor power supply circuit includes the filter circuit that is connected electrically the power input end with between the power supply circuit, the discharge circuit is connected electrically the power input end with between the filter circuit. In some embodiments, the filter circuit may filter electromagnetic interference signals, enhancing circuit stability.

Optionally, the switch includes a thyristor, and the thyristor is electrically connected to the control port. In some embodiments, the cost of the thyristor is lower.

The application also provides a cooking machine, include: a host; the stirring cup assembly is arranged on the main machine; and the food processer power supply circuit of any one of the above.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

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 application.

Fig. 1 is a schematic view of an embodiment of a food processor of the present application.

Fig. 2 is a schematic block diagram of the food processor power supply circuit of the present application.

Fig. 3 is a circuit diagram of the food processor power supply circuit shown in fig. 2.

Detailed Description

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

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front," "back," "lower," and/or "upper," and the like are for convenience of description, and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The food processer power supply circuit of the embodiment of the application comprises a power input end, a capacitor, a discharging circuit, a zero-crossing detection circuit and a controller. The power input terminals include a first power input terminal and a second power input terminal for electrical connection with a power source. The capacitor is electrically connected between the first power input terminal and the second power input terminal. The discharge circuit is connected in parallel with the capacitor and comprises a switch and a discharge resistor which are connected in series. The zero-crossing detection circuit is electrically connected with the power input end and used for detecting the electric signal on the power input end and outputting a corresponding zero-crossing signal. The controller comprises a detection port and a control port, the detection port is electrically connected to the zero-crossing detection circuit, the control port is electrically connected to the switch, the controller receives the zero-crossing signal through the detection port, when the zero-crossing signal indicates that the power input end is electrically connected with the power supply, the controller controls the switch to be disconnected through the control port, and when the zero-crossing signal indicates that the power input end is disconnected with the power supply, the controller controls the switch to be connected through the control port. The discharge circuit is connected with the capacitor in parallel and comprises a switch and a discharge resistor, the switch controls the discharge circuit to be switched on or off, and the discharge resistor can discharge the capacitor. The controller is electrically connected with the switch and controls the switch to be switched on or switched off. Zero cross detection circuit is connected with the power input end electricity, can detect whether power input end is connected with the power, and when detecting power input end and power disconnection, controller control switch switches on, and switch, discharge resistance form the return circuit with electric capacity this moment, so can realize the quick discharge of electric capacity to the protection cooking machine. The zero-crossing detection circuit, the discharge circuit and the controller are low in cost, and the cost of the food processor power supply circuit can be effectively reduced.

The application provides a cooking machine supply circuit and cooking machine. The food processor of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

Fig. 1 is a schematic view of an embodiment of a food processor 100 of the present application. As shown in fig. 1, the food processor 100 includes a main body 101 and a blending cup assembly 102. The host 101 can provide power, control and drive the food processor 100 to work, and can interact with the user. The blender cup assembly 102 is used to hold and blend food materials, such as fruits, vegetables, legumes, and the like. In some embodiments, the main body 101 may be a base structure, and the blending cup assembly 102 may be removably assembled to the main body 101. The host 101 may include a motor (not shown). A stirring assembly (not shown) and a heating assembly (not shown) may be mounted within the stirring cup assembly 102. When the cooking machine circular telegram, the motor can drive the stirring subassembly and rotate, stirs and eats the material, and heating element can heat eating the material.

Fig. 2 is a schematic block diagram of the food processor power supply circuit 110 according to the present application. The food processor 100 includes a food processor power supply circuit 110, and the food processor power supply circuit 110 can be disposed in the host 101. In some embodiments, a circuit board may be disposed in the host 101, and the processor power supply circuit 110 may be disposed on the circuit board in the host 101. The food processor power supply circuit 110 includes a power input terminal 121, a capacitor 18, a discharge circuit 13, a zero-crossing detection circuit 14, and a controller 10. The power input terminals 121 include a first power input terminal L and a second power input terminal N for electrical connection with the power supply 120. The power supply 120 may provide alternating current, such as mains. In some embodiments, the power supply 120 may transmit commercial power through a first power input terminal L and a second power input terminal N, the first power input terminal L may be a live wire, and the second power input terminal N may be a neutral wire. The capacitor 18 is electrically connected between the first power input terminal L and the second power input terminal N. When the power supply 120 is turned on, the power supply 120 supplies power to the first power input terminal L and the second power input terminal N, and when the power supply 120 is turned off, the capacitor 18 carries a residual voltage, which may damage the food processor. The discharge circuit 13 is connected in parallel with the capacitor 18, and the discharge circuit 13 includes a switch 19 and a discharge resistor 15 connected in series. When the switch 19 is turned on, the discharge circuit 13 and the capacitor 18 form a loop, and the discharge resistor 15 can eliminate the residual voltage on the capacitor 18. The zero-crossing detection circuit 14 is electrically connected to the power input end 121, and the zero-crossing detection circuit 14 is configured to detect an electrical signal at the power input end 121 and output a corresponding zero-crossing signal. Zero crossing detection circuit 14 may detect zero crossings of the electrical signal of power supply 120 and feed back to controller 10. The controller 10 includes a detection port 122 and a control port 123, and in some embodiments, the controller 10 may be a single chip microcomputer. The detection port 122 is electrically connected to the zero-crossing detection circuit 14, the control port 123 is electrically connected to the switch 19, the controller 10 receives the zero-crossing signal through the detection port 122, when the zero-crossing signal indicates that the power input terminal 121 is electrically connected to the power source 120, the controller 10 controls the switch 19 to be turned off through the control port 123, and when the zero-crossing signal indicates that the power input terminal 121 is turned off from the power source 120, the controller 10 controls the switch to be turned on through the control port 123. When the power input terminal 121 is connected to the power supply 120, the discharge circuit 13 is turned off. When the food processor is powered off, the discharge circuit 13 is turned on, and the capacitor 18 is discharged through the discharge circuit 13.

In some embodiments, the discharge circuit 13 is connected in parallel with the capacitor 18, and includes a switch 19 and a discharge resistor 15, the switch 19 controls the discharge circuit 13 to be turned on or off, and the discharge resistor 15 can discharge the capacitor. The controller 10 is electrically connected to the switch 19, and controls the switch 19 to be turned on or off. Zero cross detection circuit 14 is connected with power input 121 electricity, can detect whether power input 121 is connected with power 120, when detecting power input 121 and power 120 disconnection, controller 10 control switch 19 switches on, and switch 19, discharge resistor 15 and electric capacity 18 form the return circuit this moment, can realize electric capacity 18's quick discharge to protection cooking machine 100. The zero-cross detection circuit 14, the discharge circuit 13 and the controller 10 are low in cost, and the cost of the food processor power supply circuit 110 can be effectively reduced.

Fig. 3 is a circuit diagram of the food processor power supply circuit 110 shown in fig. 2. The capacitor 18 includes a first capacitor C101 and a second capacitor C102 connected in parallel. The zero-crossing detection circuit 14 includes detection resistors R401, R402, and R403, and the detection resistors R401, R402, and R403 are electrically connected between the first power input terminal L and the detection port 122. The detection resistors R401, R402, and R403 may detect zero-crossing points of the alternating current of the power supply 120. In some embodiments, the detection resistors R401, R402, and R403 can detect whether the power supply 120 of the food processor 100 is connected or not, and return an electric signal to the detection port 122 of the controller 10, and the circuit is simple and low in cost.

In some embodiments, switch 19 comprises a silicon controlled SCR including a first pole T1, a second pole T2, and a control pole G, with first pole T1 and second pole T2 connected in series with discharge resistor 15, and control port 123 electrically connected to control pole G. The first pole T1 is connected to the first power input terminal L, the second pole T2 is connected to the second power input terminal N, and the control pole G is connected to the controller 10 for receiving the driving control signal. In some embodiments, the controller 10 may control the SCR to be turned on or off through the control port 123, and when the controller 10 controls the SCR to be turned on, the discharging circuit 13 and the capacitor 18 form a loop to complete discharging, which is simple and low in cost. The thyristor SCR is a low power thyristor and can withstand the residual voltage of the capacitor 18. In some embodiments, the thyristor SCR comprises a triac. The bidirectional thyristor can be conducted in two directions, so that the discharge circuit 13 and the capacitor 18 form a loop, discharge can be completed no matter how the voltage direction of the capacitor 18, discharge of the capacitor can be effectively realized, safety of a circuit is guaranteed, fewer components are used, and cost is reduced. In some embodiments, the discharge circuit 13 further includes a driving resistor R111, and the driving resistor R111 is electrically connected between the switch 19 and the control port 123. The control port 123 of the controller 10 is connected to the switch 19 through the driving resistor R111, and the driving resistor R111 can effectively control the on/off of the switch, thereby enhancing the stability of the circuit. In other embodiments, the switch 19 comprises a thyristor, which is electrically connected to the control port 123. The controller 10 controls the thyristor to be turned on or off through the control port 123, thereby controlling the discharge circuit 13 to be turned on or off. The thyristor can be a bidirectional three-level thyristor and has lower cost. In other embodiments, the switch may be other electrically controlled switching elements.

The food processor power supply circuit 110 includes a power supply circuit 12, the power supply circuit 12 is electrically connected to the power input, and the power supply circuit 12 may include an ac-dc conversion circuit, such as a switching power supply. The power circuit 12 may convert the ac power provided by the power source 120 into dc power, such as 12V and 9V dc power, to power the controller 10. In some embodiments, the power circuit 12 can also supply power to other circuits and components in the food processor 100. The power supply circuit 12 includes a non-isolated power supply circuit 16 that is non-isolated from the power supply input 121, the non-isolated power supply circuit 16 may output non-isolated power, and the non-isolated power may be provided to the controller 10. The controller 10 includes a controller power terminal VCC and a controller ground terminal GND electrically connected to the non-isolated power circuit 16, respectively. In some embodiments, the controller 10 is powered using the non-isolated power supply circuit 16, and the control port 123 of the controller 10 may be directly connected to the switch 19, thereby making the circuit simple and low cost. In the illustrated embodiment, the power supply circuit 12 also includes an isolated power supply circuit 17. The isolated power supply circuit 17 may output an isolated power, such as a 12V isolated power, with the output isolated from the power supply 120. The capacitor 18 and the discharge circuit 13 are electrically connected between the power supply input terminal and the power supply circuit 12. In some embodiments, the capacitor 18 and the discharge circuit 13 are located before the input of the power circuit 12, so that the influence of the power circuit 12 can be reduced or avoided, and the food processor power supply circuit 110 can be better protected.

The food processor power supply circuit 110 includes a filter circuit 11 electrically connected between the power input terminal 121 and the power circuit 12, and the discharge circuit 13 is electrically connected between the power input terminal 121 and the filter circuit 11. In some embodiments, the filter circuit 11 may include a common-mode inductor L101, which may filter common-mode electromagnetic interference signals. The filter circuit 11 may be used for EMC filtering (electromagnetic compatibility filtering). In some embodiments, the filter circuit 11 may filter electromagnetic interference signals, enhancing circuit stability.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements 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 application is limited only by the appended claims.

Claims (10)

1. A food processor power supply circuit, comprising:

a power input (121), including a first power input and a second power input, for electrical connection to a power source (120);

a capacitor (18) electrically connected between the first power input terminal and the second power input terminal;

a discharge circuit (13) connected in parallel with the capacitor (18), the discharge circuit (13) comprising a switch (19) and a discharge resistor (15) connected in series;

the zero-crossing detection circuit (14) is electrically connected with the power supply input end (121), and the zero-crossing detection circuit (14) is used for detecting an electric signal on the power supply input end (121) and outputting a corresponding zero-crossing signal; and

the controller (10) comprises a detection port (122) and a control port (123), the detection port (122) is electrically connected to the zero-crossing detection circuit (14), the control port (123) is electrically connected to the switch (19), the controller (10) receives the zero-crossing signal through the detection port (122), when the zero-crossing signal indicates that the power input end (121) is electrically connected with the power supply (120), the controller (10) controls the switch (19) to be switched off through the control port (123), and when the zero-crossing signal indicates that the power input end (121) is disconnected with the power supply (120), the controller (10) controls the switch (19) to be switched on through the control port (123).

2. The food processor power supply circuit according to claim 1, wherein the switch (19) comprises a thyristor, the thyristor comprising a first pole, a second pole and a control pole, the first pole and the second pole being connected in series with the discharge resistor (15), the control port (123) being electrically connected with the control pole.

3. The food processor power supply circuit of claim 2, wherein the thyristor comprises a triac.

4. The food processor power supply circuit according to claim 1, wherein the discharge circuit (13) comprises a driving resistor electrically connected between the switch (19) and the control port (123).

5. The food processor power supply circuit according to claim 1, wherein the zero-crossing detection circuit (14) comprises a detection resistor electrically connected between the first power input terminal and the detection port (122).

6. The food processor power supply circuit according to claim 1, wherein the food processor power supply circuit comprises a power supply circuit (12), the power supply circuit (12) is electrically connected to the power input terminal (121), the power supply circuit (12) comprises a non-isolated power supply circuit (16), and the controller (10) comprises a controller power terminal and a controller ground terminal, the controller power terminal and the controller ground terminal being electrically connected to the non-isolated power supply circuit (16), respectively.

7. The machine power supply circuit according to claim 6, wherein the capacitor (18) and the discharge circuit (13) are electrically connected between the power input (121) and the power circuit (12).

8. The food processor power supply circuit according to claim 7, wherein the food processor power supply circuit comprises a filter circuit (11) electrically connected between the power input (121) and the power circuit (12), and the discharge circuit (13) is electrically connected between the power input (121) and the filter circuit (11).

9. The food processor power supply circuit according to claim 1, wherein the switch (19) comprises a thyristor, the thyristor being electrically connected to the control port (123).

10. A food processor, comprising:

a host (101);

the stirring cup assembly (102) is arranged on the main machine (101); and

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

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