Cup body identification circuit of food processor

Abstract

The utility model provides a cup body identification circuit of a food processor, the food processor comprises a host, a heating cup body and a non-heating cup body, the heating cup body and the non-heating cup body are detachably connected with the host, and the cup body identification circuit comprises a heating module arranged on the heating cup body; the cup body detection circuit is used for receiving the voltage signal transmitted by the heating module and generating a voltage detection signal when the heating cup body is connected with the host; and the main control module is connected with the cup body detection circuit and is used for receiving the voltage detection signal and determining the type of the cup body connected with the host according to the voltage detection signal. The problem that an existing scheme is affected by temperature and uncovering, and consequently cup body recognition errors occur can be solved.

Description

Technical Field

[0001] This utility model relates to the field of food processing technology, and more specifically, to a cup recognition circuit for a food processing machine. Background Technology

[0002] As food processors offer increasingly diverse recipes, the number of cups required also grows. These mainly include hot cups and cold cups. Hot cups are used to process foods that require heating, such as rice paste, while cold cups are used to process non-heated foods, such as juice. Therefore, food processors on the market today need to identify whether the cup is placed correctly during use, ensuring that it is either a hot or cold cup, so that the food processor can perform the corresponding functions according to different needs.

[0003] Most existing food processing machines use couplers to match different wiring methods to detect the NTC (thermistor) resistance value of the cup, distinguishing cups by judging whether the NTC resistance value is normal. For example, Chinese utility model patent CN220369869U discloses a multi-category cup identification device that uses the original NTC detection structure inside the cup to identify different types of cups. Alternatively, they use non-contact identification with Hall sensors, such as utility model patent CN214964853U, which uses multiple Hall elements on the machine body to detect magnets on the cup, identifying different cups by combining the detected values. Another example is CN215305199U, which uses linear Hall elements to detect the magnetic induction intensity around the magnet on the cup to identify different cups. Still others use methods such as identifying preheating current, such as invention patent CN105768957U, which uses a temperature detection module to detect changes in the cup's temperature after preheating after the machine is powered on. However, all of these methods have some problems:

[0004] (1) The method of identifying the NTC resistance value through the coupler will cause the NTC resistance value to exceed the normal range due to the temperature effect in a low temperature environment below -15℃, which will cause the coupler to fail to identify the cup body normally. Furthermore, when it is set in a model where the power is not interrupted when the lid is opened, since the NTC is connected in series with the step SW (switch), the NTC will be open-circuited when the lid is opened, causing problems with the cup body identification.

[0005] (2) By identifying the preheating current, since the machine automatically heats up after being powered on, the main control module identifies the cup by detecting the current value during the heating time. However, since the machine will be forced to heat up after being powered on, there are safety issues.

[0006] (3) Cup body identification by installing sensors will increase costs because Hall sensors and magnetic rings need to be installed.

[0007] Therefore, how to safely and reliably identify the cup of a food processing machine has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cup recognition circuit for a food processing machine. By setting its cup detection circuit and connection scheme, the problem of cup recognition errors caused by temperature and lid opening in the existing scheme can be solved. It can also safely and stably identify whether the cup placed on the host is a cold cup or a hot cup, while reducing costs.

[0009] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0010] A cup identification circuit for a food processor includes a main unit, a heated cup, and a non-heated cup. The heated and non-heated cups are detachably connected to the main unit. The cup identification circuit includes: a heating module disposed on the heated cup; a cup detection circuit for receiving a voltage signal transmitted by the heating module and generating a voltage detection signal when the heated cup is connected to the main unit; and a main control module connected to the cup detection circuit for receiving the voltage detection signal and determining the type of cup connected to the main unit based on the voltage detection signal.

[0011] Furthermore, the cup detection circuit includes: a diode, whose anode is connected to the output terminal of the heating module, for receiving the voltage signal output by the heating module and performing rectification processing; a first resistor, the first end of which is connected to the cathode of the diode, and the second end of which is connected to the main control module, for sending a voltage detection signal to the main control module; and a voltage divider resistor, the first end of which is connected to the second end of the first resistor, and the second end of which is connected to the ground signal.

[0012] Furthermore, the cup detection circuit also includes: a second resistor, which is connected to the second end of the first resistor, and the second end of the second resistor is connected to the first end of the voltage divider resistor.

[0013] Furthermore, the resistance values ​​of both the first and second resistors are greater than the resistance value of the voltage divider resistor.

[0014] Furthermore, the voltage at the first terminal of the voltage divider resistor is U, where 1V≤U≤4V.

[0015] Furthermore, the cup detection circuit also includes a third resistor, the first end of which is connected to the second end of the second resistor, and the second end of the third resistor is connected to the main control module.

[0016] Furthermore, the cup detection circuit also includes a capacitor connected in parallel across the voltage divider resistor to stabilize the voltage across the voltage divider resistor.

[0017] Furthermore, the heating module includes: a fuse, a heating plate, and a thermostat connected in series. The input terminal of the fuse is connected to an external power supply, and the output terminal of the thermostat is connected to the first terminal of a diode.

[0018] Furthermore, the main control module includes: an MCU microcontroller unit, connected to the first end of the voltage divider resistor, used to acquire the voltage detection signal at the first end of the voltage divider resistor; and a control board, connected to the MCU microcontroller unit, used to receive the voltage detection signal and determine the type of the cup.

[0019] Furthermore, a heated cup is a hot cup, while a non-heated cup is a cold cup.

[0020] The beneficial effects of this utility model embodiment are:

[0021] Firstly, this embodiment of the application sets up a cup identification circuit in the food processing machine, with the heating module set on the heated cup body, i.e., on the hot cup, and a cup detection circuit that can communicate with the heating module is set up. This allows the cup detection circuit to receive the voltage signal sent by the heating module when the heated cup body is set on the main unit, and generate a voltage detection signal that is transmitted to the main control module, thereby determining whether the cup body is a hot or cold cup. Conversely, if a non-heated cup body is set on the main unit, since no heating module is set on the non-heated cup body, i.e., the cold cup, the main control module will not receive the voltage detection signal, and thus can determine that the cup body is a non-heated cup body.

[0022] By setting up the aforementioned cup recognition circuit, the installation structure of the food processor can be simplified and costs reduced. Simultaneously, by placing the heating module on the heated cup and the cup detection circuit on the main unit, a connection circuit is established between the heated cup and the main unit. This addresses the problem of the detection circuit failing to recognize the cup when the lid is opened in models where power is not interrupted, thus improving the flexibility of the cup recognition circuit. Furthermore, it solves the problem of cup recognition issues caused by the temperature fluctuations in the existing circuit structure due to the inclusion of an NTC circuit.

[0023] Secondly, by monitoring whether the cup detection circuit sends a voltage detection signal, the embodiments of this application can quickly and directly achieve the purpose of identifying the cup, improve the accuracy and reliability of the monitoring results, avoid errors caused by transmission errors, loading errors, and grounding current, improve measurement accuracy, and thus reduce the possibility of problems in judgment.

[0024] Meanwhile, the embodiments of this application identify the cup by directly setting the cup detection circuit in the host, which simplifies the structure, reduces costs, and saves resources compared to installing sensors and magnetic rings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly described below.

[0026] Figure 1 This is a schematic diagram of the structure of a cup recognition circuit for a food processing machine according to an embodiment of this application;

[0027] Figure 2 This is a circuit diagram of a cup detection circuit for a food processing machine according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the main control module of a food processing machine according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the cup recognition circuit of a food processing machine according to an embodiment of this application.

[0030] Figure reference numerals: Heating module 1; Fuse 11; Heating plate 12; Temperature controller 13; Cup detection circuit 2; Main control module 3; MCU microcontroller unit 31; Control board 32; Motor 4. Detailed Implementation

[0031] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] The purpose of this invention is to provide a cup recognition circuit for a food processing machine.

[0033] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0034] See Figure 1 This application provides a cup identification circuit for a food processor. The food processor includes a main unit, a heated cup, and a non-heated cup (not shown in the figure). The heated cup and the non-heated cup are detachably connected to the main unit. By replacing the heated cup and the non-heated cup, different cooking recipes of the food processor can be realized.

[0035] The cup identification circuit is applied to the above-mentioned food processing machine to identify non-heated cups and heated cups. In one embodiment, the heated cup can be a hot cup, and the non-heated cup can be a dry grinding cup, a cold beating cup, or a cold cup.

[0036] The cup recognition circuit includes a heating module 1, a cup detection circuit 2, and a main control module 3.

[0037] Heating module 1 is installed on the heating cup body. Cup body detection circuit 2 is used to receive the voltage signal transmitted by heating module 1 and generate a voltage detection signal when the heating cup body is connected to the host. Main control module 3 is connected to cup body detection circuit 2 and is used to receive the voltage detection signal and determine the type of cup body connected to the host according to the voltage detection signal.

[0038] In this embodiment, a cup detection circuit 2 is provided. When the heated cup is placed on the host, its heating module 1 is connected to the cup detection circuit 2. The cup detection circuit 2 receives the voltage signal sent by the heating module 1 and generates a voltage detection signal, which is transmitted to the main control module 3. Conversely, when a non-heated cup is placed on the host, since the non-heated cup does not have a heating module 1, the input terminal of the cup detection circuit 2 is disconnected, and the main control module 3 does not receive the voltage detection signal.

[0039] In one embodiment, the heating module 1 is disposed at the bottom of the cup body, and the cup body detection circuit 2 is disposed inside the main unit.

[0040] Therefore, the cup detection circuit 2 provided in this embodiment of the application is used in conjunction with the heating module 1 to simplify the circuit structure and connection structure. Its internal circuit is not affected by temperature and can operate in an environment of -15℃. Moreover, the cup detection circuit 2 is set inside the host and can still operate even when the cup is open. This solves the problem of cup recognition being affected when the cup is open and can be applied to various models, improving the flexibility of the cup recognition circuit.

[0041] This application embodiment can perform cup recognition by setting a cup recognition circuit. On the one hand, compared with the prior art, which requires installing magnetic rings at different positions on the cup and sensors at the same position on the host, it can simplify the installation structure, reduce costs, and save resources. On the other hand, the circuit recognition is more stable and less affected by the external environment. It is directly set in the host, which reduces the possibility of cup recognition errors caused by unstable installation structure or external factors.

[0042] Compared to existing technologies that identify cups using preheating current, this method improves safety and ensures the safe and stable operation of the food processor and the cup identification circuit.

[0043] In the above embodiment, the voltage detection signal is used to indicate that the heated cup is set on the main unit, that is, the heating module 1 and the cup detection circuit 2 are connected. For example, when the main control module 3 receives a non-zero voltage value, it can be considered that a voltage detection signal has been received. Similarly, when the non-heated cup is set on the main unit, the main control module 3 receives a zero voltage value and therefore does not receive a voltage detection signal.

[0044] See Figure 2 In one embodiment, the cup detection circuit 2 includes a diode D1, a first resistor R1, and a voltage divider resistor R3.

[0045] The anode of diode D1 is connected to the output terminal of heating module 1 to receive the voltage signal output by heating module 1 and perform rectification.

[0046] The first end of the first resistor R1 is connected to the cathode of the diode D1, and the second end of the first resistor R1 is connected to the main control module 3, which is used to send a voltage detection signal to the main control module 3.

[0047] The first end of the voltage divider resistor R3 is connected to the second end of the first resistor R1, and the second end of the voltage divider resistor R3 is connected to the ground signal.

[0048] Among them, the resistance of the first resistor R1 is much greater than the resistance of the voltage divider resistor R3, and the voltage at the first end of the voltage divider resistor R3 is U, and 1V≤U≤4V.

[0049] In one embodiment, the cup detection circuit 2 may further include a second resistor R2, which is connected to the second end of the first resistor R1, and the second end of the second resistor R2 is connected to the first end of the voltage divider resistor R3.

[0050] The resistance of the first resistor R1 may or may not be equal to the resistance of the second resistor R2. Both the resistance of the first resistor R1 and the resistance of the second resistor R2 are greater than the resistance of the voltage divider resistor R3. The voltage at the first terminal of the voltage divider resistor R3 is U, and 1V≤U≤4V, to ensure the stability and safety of the cup recognition circuit.

[0051] In one embodiment, the first resistor R1 has a resistance of 560kΩ, the second resistor R2 has a resistance of 560kΩ, and the voltage divider resistor R3 has a resistance of 12kΩ.

[0052] In one embodiment, the cup detection circuit 2 further includes a third resistor R4 and a capacitor C1.

[0053] The first end of the third resistor R4 is connected to the second end of the second resistor R2, and the second end of the third resistor R4 is connected to the main control module 3.

[0054] Capacitor C1 is connected in parallel across the voltage divider resistor R3 to stabilize the voltage across R3.

[0055] In the above embodiment, the heating module 1 includes a fuse 11, a heating plate 12, and a thermostat 13 connected in series. The input terminal of the fuse 11 is connected to an external power supply. The external power supply is used to power the heating module 1, and the output terminal of the thermostat 13 is connected to the first terminal of a diode D1.

[0056] The voltage signal sent from the external power supply passes sequentially through the fuse 11, heating plate 12, and temperature controller 13, and is then transmitted to the anode of diode D1. After rectification by diode D1, the signal flows to the first resistor R1, the second resistor R2, and the voltage divider resistor R3 for voltage division. The voltage value at the first end of the voltage divider resistor R3 is transmitted to the main control module 3, which generates a voltage detection signal through the cup detection circuit 2 and transmits it to the main control module 3. The main control module 3 determines the type of cup by collecting the voltage detection signal.

[0057] See Figure 3 , combined Figure 2 In one embodiment, the main control module 3 includes an MCU microcontroller unit 31 and a control board 32. The MCU microcontroller unit 31 is connected to the first end of the voltage divider resistor R3 in the cup detection circuit 2 and is used to collect the voltage detection signal of the first end of the voltage divider resistor R3.

[0058] The control board 32 is connected to the MCU microcontroller unit 31 to receive voltage detection signals and determine the type of cup based on the voltage detection signals.

[0059] The food processor also includes a motor 4, which is located inside the cup and is used to drive the blades of the cup to rotate at high speed. At the same time, the motor 4 is connected to the heating plate 12 and the MCU microcontroller unit 31 to provide heating function for the food processor, so that the food can be heated during the operation of the food processor. Since the internal components of the motor 4 sense the temperature change when the heating module 1 is connected to the circuit, the resistance of the components changes, which affects the voltage. Therefore, the voltage of the motor 4 is different when it is connected to the heating cup and when it is not connected to the heating cup.

[0060] In one embodiment, the cup body is further identified by using the motor voltage signal of motor 4 to help determine whether the voltage is normal.

[0061] The aforementioned MCU microcontroller unit 31 is used to receive the voltage detection signal sent by the cup body detection circuit 2 and the motor voltage signal sent by the motor 4.

[0062] The MCU microcontroller unit 31 transmits the voltage detection signal and motor voltage signal to the control board 32. The control board 32 processes the motor voltage signal and voltage detection signal, generates voltage information, and determines whether the voltage information is normal to determine the type of the cup.

[0063] like Figure 4 As shown, combined with Figure 3 The specific cup detection logic of the food processing machine is as follows:

[0064] Step S910: The control board 32 receives the voltage detection signal within a preset time interval.

[0065] In one embodiment, the preset time interval can be 20ms.

[0066] Step S920: After receiving a set of voltage information, the control board 32 calculates the checksum of the voltage detection signal.

[0067] Step S930: Control board 32 determines whether the checksum is correct.

[0068] Step S940: If not, the control board 32 continues to receive the next set of voltage detection signals, calculates the checksum, and determines whether it is correct.

[0069] Step S950: If yes, the control board 32 receives the motor voltage signal, generates voltage information based on the motor voltage signal and the voltage detection signal, and decodes the voltage information.

[0070] In step S950 above, when the checksum is correct, the control board 32 will store the voltage information into the corresponding structure and decode the stored voltage information according to the communication protocol.

[0071] Step S960: Control board 32 determines whether the decoded voltage information is normal.

[0072] Step S970: If the voltage information is normal, confirm that the cup is a heating cup.

[0073] In one embodiment, a decoded data value of "00" indicates that the voltage information is normal.

[0074] Step S980: If the voltage information is abnormal, determine that the cup is a non-heated cup.

[0075] In one embodiment, the decoded data "01" indicates that the voltage is too high, and the decoded data "10" indicates that the voltage is too low, both of which are abnormal voltage information.

[0076] This embodiment of the application determines the type of cup by monitoring whether the cup detection circuit 2 sends a voltage detection signal and combining it with the motor voltage signal of the motor 4 to determine whether the voltage information generated by both is normal. This can quickly and directly achieve the purpose of cup identification, improve the accuracy and reliability of monitoring results, avoid errors caused by transmission errors, loading errors, and grounding current, improve measurement accuracy, and reduce the possibility of problems in judgment.

[0077] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0078] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cup identification circuit for a food processor, the food processor comprising a main unit, a heated cup, and a non-heated cup, wherein one of the heated cup and the non-heated cup is detachably connected to the main unit, characterized in that, The cup recognition circuit includes: A heating module is disposed on the heating cup body; The cup body detection circuit is used to receive the voltage signal transmitted by the heating module and generate a voltage detection signal when the heating cup body is connected to the host. The main control module is connected to the cup detection circuit and is used to receive the voltage detection signal and determine the type of cup connected to the host based on the voltage detection signal.

2. The cup recognition circuit of the food processing machine according to claim 1, characterized in that, The cup detection circuit includes: A diode, whose anode is connected to the output terminal of the heating module, is used to receive the voltage signal output by the heating module and perform rectification processing; A first resistor, the first end of which is connected to the cathode of the diode, and the second end of which is connected to the main control module, for sending a voltage detection signal to the main control module; A voltage divider resistor, wherein the first end of the voltage divider resistor is connected to the second end of the first resistor, and the second end of the voltage divider resistor is connected to the ground signal.

3. The cup recognition circuit of the food processing machine according to claim 2, characterized in that, The cup detection circuit also includes: The second resistor is connected to the second end of the first resistor, and the second end of the second resistor is connected to the first end of the voltage divider resistor.

4. The cup recognition circuit of the food processing machine according to claim 3, characterized in that, The resistance values ​​of the first resistor and the second resistor are both greater than the resistance value of the voltage divider resistor.

5. The cup recognition circuit of the food processing machine according to claim 3, characterized in that, The voltage at the first terminal of the voltage divider resistor is U, where 1V≤U≤4V.

6. The cup recognition circuit of the food processing machine according to claim 3, characterized in that, The cup detection circuit also includes: The third resistor has its first end connected to the second end of the second resistor, and its second end connected to the main control module.

7. The cup recognition circuit of the food processing machine according to claim 2, characterized in that, The cup detection circuit also includes: A capacitor is connected in parallel across the voltage divider resistor to stabilize the voltage across the voltage divider resistor.

8. The cup recognition circuit of the food processing machine according to claim 2, characterized in that, The heating module includes a fuse, a heating plate, and a thermostat connected in series. The input terminal of the fuse is connected to an external power supply, and the output terminal of the thermostat is connected to the first terminal of the diode.

9. The cup recognition circuit of the food processing machine according to claim 2, characterized in that, The main control module includes: The MCU (Microcontroller Unit) is connected to the first terminal of the voltage divider resistor and is used to acquire the voltage detection signal at the first terminal of the voltage divider resistor. The control board, connected to the MCU microcontroller unit, is used to receive the voltage detection signal and determine the type of the cup.

10. The cup recognition circuit of the food processing machine according to claim 1, characterized in that, The heated cup is a hot cup, and the non-heated cup is a cold cup.

Images