Electric coffee grinding mechanism with automatic powder cleaning function

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By designing an electric coffee grinding mechanism with automatic powder cleaning function in the coffee grinder, and using the control system to control the forward grinding and reverse rotation of the motor to clean the powder, the problem of coffee powder residue and agglomeration is solved and the coffee powder is achieved. Sanitation and long-term efficient operation of equipment.

CN222357521UActive Publication Date: 2025-01-17GUANGDONG HOMEZEST TECH CO LTD

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Patent Information

Application Number: CN202420325151.3
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-02-22
Publication Date: 2025-01-17
Estimated Expiration: 2034-02-22

AI Technical Summary

Technical Problem

During the use of existing coffee grinders, the coffee powder is prone to residue and becomes moldy and agglomerated due to moisture, affecting the quality of the coffee and the operation of the equipment. The existing powder sweeper cannot effectively remove the agglomerated powder, resulting in the failure of the equipment.

Method used

An electric coffee grinding mechanism with automatic powder cleaning function is designed, including the main housing, grinding chamber, static grinding disc, moving grinding disc and dust sweeping brush. The control system controls the motor to perform forward grinding and reverse grinding. Reverse the grinding mechanism to remove any remaining coffee grounds from the grinding disc.

Benefits of technology

It effectively avoids the problem of moisture, mold and agglomeration of coffee powder, ensures the hygiene of coffee and the long-term effective operation of the equipment, and improves the reliability and user experience of the equipment.

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Abstract

An electric coffee grinding mechanism with an automatic powder cleaning function is characterized by comprising a main shell, the interior of the main shell is hollow to form a grinding cavity, a static grinding disc is installed in the grinding cavity, a movable grinding disc which is driven by a motor to rotate is arranged corresponding to the static grinding disc, and a powder sweeping brush is installed at the bottom of the movable grinding disc. The powder sweeping brush is used for discharging coffee powder from the discharge hole; the motor is electrically connected with the control system, and the control system controls the motor to rotate forwards to grind powder according to requirements of working modes and controls the motor to rotate reversely to clear powder after powder grinding is completed. The coffee grinding machine has the advantages that the motor rotates reversely after grinding is completed through the control system, residual coffee powder in a bean grinding disc is effectively removed, the problem that the coffee powder of a traditional coffee grinding machine is affected with damp, mildewed and caked is solved, and sanitation of follow-up coffee making and long-term effective operation of equipment are guaranteed.

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Description

Technical Field

[0001] The utility model relates to a coffee machine, in particular to an electric coffee grinding mechanism with an automatic coffee powder cleaning function. Background Art

[0002] In modern food culture, coffee consumption has spread all over the world, and coffee machines have become one of the commonly used appliances in homes and commercial places. In particular, freshly ground coffee beans can provide consumers with a better flavor experience. Therefore, coffee machines with grinding functions are becoming more and more popular. However, existing coffee grinding mechanisms have several problems and need to be improved.

[0003] First, during the use of existing coffee grinders, coffee powder often remains in the grinding disk. Over time, these residual coffee powders may become moldy and lumpy due to moisture, thus affecting the quality and hygienic safety of the coffee. In a humid environment, coffee powder easily absorbs moisture, which not only causes mold problems, but also may affect the operation of mechanical parts, thereby shortening the service life of the equipment.

[0004] Secondly, when the coffee powder clumps, the powder sweeper in the prior art cannot effectively remove the clumps, which will cause the coffee powder to be unable to be discharged smoothly from the discharge port, thus affecting the normal operation of the coffee machine. In some cases, the clumping of coffee powder may even cause the device to fail completely, requiring the user to manually clean it, which not only increases the difficulty of use for the user, but also reduces the user experience. In view of the above problems, the design of the existing coffee grinding mechanism needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide an electric coffee grinding mechanism with an automatic powder cleaning function, which has a simple structure and is easy to use, can ensure the freshness and hygiene of coffee powder, avoid the problem of coffee powder agglomeration, and can automatically remove residual coffee powder, so as to improve the reliability of the equipment and the convenience of maintenance.

[0006] The utility model aims to achieve the following objectives: an electric coffee grinding mechanism with automatic powder cleaning function, characterized in that it comprises a main housing, the interior of the main housing is hollow to form a grinding chamber, a static grinding disc is installed in the grinding chamber, a dynamic grinding disc driven to rotate by a motor is arranged corresponding to the static grinding disc, a powder sweeping brush is installed at the bottom of the dynamic grinding disc, and the powder sweeping brush discharges the coffee powder from the discharge port;

[0007] The motor is electrically connected to the control system, and the control system controls the motor to perform forward grinding according to the working mode requirements, and after the grinding is completed, controls the motor to perform reverse grinding to clean the powder;

[0008] The control system includes: a main control MCU and a main circuit connected thereto, wherein MOTOR3 of the main control MCU is a forward control pin, and MOTO resistor R2 is a reverse control pin;

[0009] Wherein, the main circuit includes a forward control circuit and a reverse control circuit, wherein the forward control circuit includes a resistor R35 connected in series with the MOTOR3 pin of the MCU, the other end of the resistor R35 is connected to the base of the transistor Q5, the collector of the transistor Q5 is connected to a resistor R32, the other end of the resistor R32 is connected in parallel with a resistor R29 and the gate of the MOS tube Q2, the other end of the resistor R29 is connected to the power supply, and the source of the MOS tube Q2 is connected to the positive electrode of the socket CN3;

[0010] The power supply is connected to the drain of the MOS tube Q3, and the source of the MOS tube Q3 is connected to the negative electrode of the socket CN3; the gate of the MOS tube Q3 is connected in parallel with the resistor R28 and the resistor R31, the other end of the resistor R28 is connected to the drain of the MOS tube Q3, the other end of the resistor R31 is connected to the collector of the transistor Q4, and the base of the transistor Q4 is connected to the MOTOR2 pin of the MCU through the resistor R34; the emitter of the transistor Q4 is grounded;

[0011] The reverse control circuit includes a resistor R39 connected in series with the MOTOR2 pin of the MCU, the other end of the resistor R39 is connected to the gate of the MOS tube Q6, and the source of the MOS tube Q6 is connected to the positive electrode of the socket CN3; the drain of the MOS tube Q6 is connected in series with the resistor R41 and the R resistor R40, and then connected to the gate of the MOS tube Q7;

[0012] The source of the MOS tube Q7 is connected to the negative electrode of the socket CN3, the gate of the MOS tube Q7 is connected to the MOTOR3 pin of the MCU through the resistor R38, and the power line of the motor is inserted into the socket CN3.

[0013] The resistor R40 is connected in parallel with the capacitor C16, the resistor R41 is connected in parallel with the resistor R42, and the MOS tube Q7 is connected to the AD-MOTOR pin of the MCU after the leakage detection is connected in series with the resistor R45.

[0014] The AD-MOTOR is connected in series with capacitor C12 and then grounded.

[0015] The gate of the MOS tube Q6 is connected to the ground via a resistor R43, and a capacitor C18 is connected in parallel to the resistor R43.

[0016] The heating electrode of the transistor Q5 is connected to the ground, and a resistor R37 is connected in parallel between the heating electrode and its base.

[0017] The emitter of the transistor Q4 is grounded, and a resistor R36 and a capacitor C17 are connected in parallel between the emitter and the base.

[0018] The positive and negative electrodes of the socket CN3 are connected in parallel with a capacitor C11.

[0019] The beneficial effects of the utility model are: 1. Simple structure, low production cost and improved market competitiveness. 2. The control system enables the motor to reverse after the grinding is completed, effectively removing the residual coffee powder in the grinding bean plate, thereby solving the problem of the coffee powder of the traditional coffee grinder getting damp, mildewed and agglomerated, and ensuring the hygiene of the subsequent coffee making and the long-term effective operation of the equipment. 3. Since the automatic powder cleaning mechanism can prevent the coffee powder from agglomerating, it reduces the situation where the powder sweeper cannot clean out the agglomerated coffee powder, reduces the risk of product failure and improves the reliability of the equipment. 4. Through the MOTOR3 and MOTOR2 pins of the main control MCU, the present invention realizes precise forward and reverse control. The specially designed control circuit allows the user or the preset program to accurately control the operation mode of the motor and realize the precise switching between grinding and cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model.

[0021] Figure 2 It is a structural sectional view of the utility model.

[0022] Figure 3 This is the structural assembly drawing of the utility model.

[0023] Figure 4 This is the circuit diagram of the utility model. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below with reference to the accompanying drawings. An electric coffee grinding mechanism with automatic powder cleaning function, characterized in that it comprises a main housing 1, the interior of the main housing 1 is hollow to form a grinding chamber 2, a static grinding disc 3 is installed in the grinding chamber 2, a dynamic grinding disc 5 driven to rotate by a motor 4 is arranged corresponding to the static grinding disc 3, a powder sweeping brush 6 is installed at the bottom of the dynamic grinding disc 5, and the powder sweeping brush 6 discharges the coffee powder from the discharge port;

[0025] The motor is electrically connected to the control system, and the control system controls the motor to perform forward grinding according to the working mode requirements, and after the grinding is completed, controls the motor to perform reverse grinding to clean the powder;

[0026] The control system includes: a main control MCU and a main circuit connected thereto, wherein MOTOR3 of the main control MCU is a forward control pin, and MOTO resistor R2 is a reverse control pin;

[0027] Wherein, the main circuit includes a forward control circuit and a reverse control circuit, wherein the forward control circuit includes a resistor R35 connected in series with the MOTOR3 pin of the MCU, the other end of the resistor R35 is connected to the base of the transistor Q5, the collector of the transistor Q5 is connected to a resistor R32, the other end of the resistor R32 is connected in parallel with a resistor R29 and the gate of the MOS tube Q2, the other end of the resistor R29 is connected to the power supply, and the source of the MOS tube Q2 is connected to the positive electrode of the socket CN3;

[0028] The power supply is connected to the drain of the MOS tube Q3, and the source of the MOS tube Q3 is connected to the negative electrode of the socket CN3; the gate of the MOS tube Q3 is connected in parallel with the resistor R28 and the resistor R31, the other end of the resistor R28 is connected to the drain of the MOS tube Q3, the other end of the resistor R31 is connected to the collector of the transistor Q4, and the base of the transistor Q4 is connected to the MOTOR2 pin of the MCU through the resistor R34; the emitter of the transistor Q4 is grounded;

[0029] The reverse control circuit includes a resistor R39 connected in series with the MOTOR2 pin of the MCU, the other end of the resistor R39 is connected to the gate of the MOS tube Q6, and the source of the MOS tube Q6 is connected to the positive electrode of the socket CN3; the drain of the MOS tube Q6 is connected in series with the resistor R41 and the R resistor R40, and then connected to the gate of the MOS tube Q7;

[0030] The source of the MOS tube Q7 is connected to the negative electrode of the socket CN3, the gate of the MOS tube Q7 is connected to the MOTOR3 pin of the MCU through the resistor R38, and the power line of the motor is inserted into the socket CN3.

[0031] The resistor R40 is connected in parallel with the capacitor C16, the resistor R41 is connected in parallel with the resistor R42, and the MOS tube Q7 is connected to the AD-MOTOR pin of the MCU after the leakage detection is connected in series with the resistor R45.

[0032] The AD-MOTOR is connected in series with capacitor C12 and then grounded.

[0033] The gate of the MOS tube Q6 is connected to the ground via a resistor R43, and a capacitor C18 is connected in parallel to the resistor R43.

[0034] The heating electrode of the transistor Q5 is connected to the ground, and a resistor R37 is connected in parallel between the heating electrode and its base.

[0035] The emitter of the transistor Q4 is grounded, and a resistor R36 and a capacitor C17 are connected in parallel between the emitter and the base.

[0036] The positive and negative electrodes of the socket CN3 are connected in parallel with a capacitor C11.

[0037] Working principle: In this case, when the grinding mechanism is working normally, the motor drives the moving grinding disc to rotate in the forward direction, thereby grinding the coffee beans between the moving grinding disc and the static grinding disc into powder. The forward control principle is as follows:

[0038] When the MCU gives a low-level signal to the MOTOR3 pin, the base of the transistor Q5 is pulled down and cut off by this signal, and then the base of the NPN MOS tube Q2 is pulled up and turned on by the 220V high level, that is, the positive pole of the motor is turned on by the 220V high level. At the same time, because the MCU gives a low-level signal to the MOTOR3 pin, the base of the PNP MOS tube Q7 is pulled down and turned on by this signal, that is, the negative pole of the motor is turned on by GND. Finally, forward rotation is achieved.

[0039] When the MCU gives a low-level signal to the MOTOR3 pin, it also needs to give a high-level signal to the MOTOR2 pin to prevent the motor reversing circuit from interfering with the forward control circuit. After the MOTOR2 pin receives a high-level signal, the base of the transistor Q4 is pulled high by this signal and turned on, and then the base of the NPN MOS tube Q3 is pulled low by the GND low level and turned off, that is, the negative pole of the motor is not connected to the 220V high level. At the same time, because the MCU gives a high-level signal to the MOTOR2 pin, the base of the PNP MOS tube Q6 is pulled high by GND and turned off, that is, the positive pole of the motor is not connected to the GND low level. Finally, non-interference with the forward rotation is achieved.

[0040] When the grinding is completed, the control system can control the motor to reverse. The reverse control principle is as follows: when the MCU gives a low-level signal to the MOTOR2 pin, the base of the transistor Q4 is pulled down by this signal and cut off, and then the base of the NPN MOS tube Q2 is pulled up by the 220V high level and turned on, that is, the negative pole of the motor is turned on by the 220V high voltage. At the same time, because the MCU gives a low-level signal to the MOTOR2 pin, the base of the PNP MOS tube Q6 is pulled down by this signal and turned on, that is, the positive pole of the motor is turned on by GND. Finally, the reverse is achieved.

[0041] When the MCU gives a low-level signal to the MOTOR2 pin, it also needs to give a high-level signal to the MOTOR3 pin to prevent the motor forward circuit from interfering with the reverse control circuit. After the MOTOR3 pin receives a high-level signal, the base of the transistor Q5 is pulled high by this signal and turned on, and then the base of the NPN MOS tube Q3 is pulled low by the GND low level and turned off, that is, the positive pole of the motor is not connected to the 220V high level. At the same time, because the MCU gives a high-level signal to the MOTOR3 pin, the base of the PNP MOS tube Q7 is pulled high by GND and turned off, that is, the negative pole of the motor is not connected to GND. Finally, non-interference reversal is achieved.

[0042] When the motor is changed to reverse rotation, it drives the bean grinding wheel and the powder sweeper to rotate in the reverse direction. At this time, the grinding wheel will not grind beans, and the powder sweeper will continue to sweep the residual coffee powder in the bean grinding disc. The reverse rotation of the moving grinding disc will generate a release force to throw out the coffee powder adhering to the grinding disc. At the same time, the generated airflow also has a certain impact effect to blow away the coffee powder on the grinding disc. Therefore, the present invention controls the reverse rotation of the bean grinding motor to clean the residual powder on the bean grinding disc, thereby preventing the residual coffee powder from accumulating in the bean grinding disc for a long time and getting damp, moldy and agglomerated, which affects the hygiene of subsequent coffee making. At the same time, when the coffee powder agglomerates, the powder sweeper cannot sweep out the agglomerated coffee powder, resulting in product failure, so it can be widely promoted and used.

[0043] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An electric coffee grinding mechanism with automatic powder cleaning function, characterized in that: The invention comprises a main housing (1), the interior of the main housing (1) is hollow to form a grinding chamber (2), a static grinding disc (3) is installed in the grinding chamber (2), a dynamic grinding disc (5) is arranged corresponding to the static grinding disc (3) and is driven to rotate by a motor (4), and a powder sweeping brush (6) is installed at the bottom of the dynamic grinding disc (5), and the powder sweeping brush (6) discharges coffee powder from a discharge port; The motor is electrically connected to the control system, and the control system controls the motor to perform forward grinding according to the working mode requirements, and after the grinding is completed, controls the motor to perform reverse grinding to clean the powder; The control system includes: a main control MCU and a main circuit connected thereto, wherein MOTOR3 of the main control MCU is a forward control pin, and MOTO resistor R2 is a reverse control pin; Wherein, the main circuit includes a forward control circuit and a reverse control circuit, wherein the forward control circuit includes a resistor R35 connected in series with the MOTOR3 pin of the MCU, the other end of the resistor R35 is connected to the base of the transistor Q5, the collector of the transistor Q5 is connected to a resistor R32, the other end of the resistor R32 is connected in parallel with a resistor R29 and the gate of the MOS tube Q2, the other end of the resistor R29 is connected to the power supply, and the source of the MOS tube Q2 is connected to the positive electrode of the socket CN3; The power supply is connected to the drain of the MOS tube Q3, and the source of the MOS tube Q3 is connected to the negative electrode of the socket CN3; the gate of the MOS tube Q3 is connected in parallel with the resistor R28 and the resistor R31, the other end of the resistor R28 is connected to the drain of the MOS tube Q3, the other end of the resistor R31 is connected to the collector of the transistor Q4, and the base of the transistor Q4 is connected to the MOTOR2 pin of the MCU through the resistor R34; the emitter of the transistor Q4 is grounded; The reverse control circuit includes a resistor R39 connected in series with the MOTOR2 pin of the MCU, the other end of the resistor R39 is connected to the gate of the MOS tube Q6, and the source of the MOS tube Q6 is connected to the positive electrode of the socket CN3; the drain of the MOS tube Q6 is connected in series with the resistor R41 and the R resistor R40, and then connected to the gate of the MOS tube Q7; The source of the MOS tube Q7 is connected to the negative electrode of the socket CN3, the gate of the MOS tube Q7 is connected to the MOTOR3 pin of the MCU through the resistor R38, and the power line of the motor is inserted into the socket CN3.

2. The electric coffee grinding mechanism with automatic coffee powder cleaning function according to claim 1, characterized in that: The resistor R40 is connected in parallel with the capacitor C16, the resistor R41 is connected in parallel with the resistor R42, and the MOS tube Q7 is connected to the AD-MOTOR pin of the MCU after the leakage detection is connected in series with the resistor R45.

3. The electric coffee grinding mechanism with automatic coffee powder cleaning function according to claim 2, characterized in that: The AD-MOTOR is connected in series with capacitor C12 and then grounded.

4. The electric coffee grinding mechanism with automatic coffee powder cleaning function according to claim 1, characterized in that: The gate of the MOS tube Q6 is connected to the ground via a resistor R43, and a capacitor C18 is connected in parallel to the resistor R43.

5. The electric coffee grinding mechanism with automatic coffee powder cleaning function according to claim 1, characterized in that: The heating electrode of the transistor Q5 is connected to the ground, and a resistor R37 is connected in parallel between the heating electrode and its base.

6. The electric coffee grinding mechanism with automatic coffee powder cleaning function according to claim 1, characterized in that: The emitter of the transistor Q4 is grounded, and a resistor R36 and a capacitor C17 are connected in parallel between the emitter and the base.

7. The electric coffee grinding mechanism with automatic coffee powder cleaning function according to claim 1, characterized in that: The positive and negative electrodes of the socket CN3 are connected in parallel with a capacitor C11.