Food wall breaking machine

Abstract

The utility model relates to a food wall breaking machine which comprises a stirring cup, a smashing knife, a direct current motor and a control panel, the control panel is integrated with a direct current driving circuit, a speed regulation circuit, an energy storage capacitor C1, an IGBT crystal control tube Q1, a protective tube FUSE1, a piezoresistor R4 and a thermistor R5, and the output end of the direct current driving circuit is electrically connected with the direct current motor. The positive electrode of the energy storage capacitor C1 is connected with a live wire, the negative electrode of the energy storage capacitor C1 is connected with a zero wire and is grounded, the direct-current driving circuit and the speed regulation circuit are connected to the two ends of the energy storage capacitor C1 in parallel through the IGBT crystal control tube Q1, one end of the protective tube FUSE1 is electrically connected with the live wire, and the other end of the protective tube FUSE1 is electrically connected with the positive electrode of the energy storage capacitor C1. The piezoresistor R4 is arranged between the protective tube FUSE1 and the energy storage capacitor C1, two ends of the piezoresistor R4 are electrically connected with the live wire and the null line respectively, the thermistor R5 is connected in series with the null line, one end of the thermistor R5 is electrically connected with the null line, and the other end of the thermistor R5 is electrically connected with the piezoresistor R4. The circuit board provided by the utility model is high in integration degree.

Description

Technical Field

[0001] The utility model relates to a food wall-breaking machine, in particular to a DC motor control board of the food wall-breaking machine. Background Art

[0002] Traditional food blenders place control systems for different functions on multiple control panels separately. The control panels are not highly integrated, which is not conducive to product structure layout and assembly. Utility Model Content

[0003] The utility model discloses a food wall breaking machine with an integrated control panel.

[0004] To this end, the utility model adopts the following technical solutions:

[0005] A food wall breaking machine comprises a mixing cup, a crushing blade arranged in the mixing cup, and a DC motor arranged outside the mixing cup and connected to the crushing blade, wherein the rated power of the DC motor is between 550W and 1450W; and further comprises a control board arranged outside the mixing cup and electrically connected to the DC motor, wherein the control board integrates a DC drive circuit, a speed control circuit, an energy storage capacitor C1, an IGBT crystal control tube Q1, a fuse FUSE1, a varistor R4 and a thermistor R5, wherein the output end of the DC drive circuit is electrically connected to the DC motor, the positive pole of the energy storage capacitor C1 is connected to a live wire, and the negative pole is connected to a neutral wire. line and grounded, the emitter of the IGBT crystal control tube Q1 is electrically connected to the positive electrode of the energy storage capacitor C1, the control gate is electrically connected to the speed regulation circuit, and the collector is electrically connected to the DC drive circuit, so that the DC drive circuit and the speed regulation circuit are connected in parallel to the two ends of the energy storage capacitor C1, one end of the fuse FUSE1 is electrically connected to the live wire, and the other end is electrically connected to the positive electrode of the energy storage capacitor C1, the varistor R4 is arranged between the fuse FUSE1 and the energy storage capacitor C1, and the two ends are electrically connected to the live wire and the neutral wire respectively, and the thermistor R5 is connected in series with the neutral wire, and one end is electrically connected to the neutral wire, and the other end is electrically connected to the varistor R4.

[0006] As a preferred solution, the control board is also integrated with a speed regulating resistor R1, and the speed regulating resistor R1 is connected in series between the speed regulating circuit and the DC drive circuit.

[0007] As a preferred solution, the speed control circuit is also independently grounded.

[0008] As a preferred solution, the control board is further integrated with a control resistor R2, and the control resistor R2 is connected in series between the control gate of the IGBT crystal control tube Q1 and the speed regulation circuit.

[0009] As a preferred solution, the control board is further integrated with a sampling resistor R3, and the sampling resistor R3 is connected in series between the negative electrode of the energy storage capacitor C1 and the DC drive circuit.

[0010] As a preferred solution, the control board also integrates a rectifier bridge U1, which is arranged between the energy storage capacitor C1 and the varistor R4. The positive electrode of the energy storage capacitor C1 is electrically connected to the DC output positive electrode of the rectifier bridge U1, and the negative electrode is electrically connected to the DC output negative electrode of the rectifier bridge U1.

[0011] As a preferred solution, the control board also integrates a safety capacitor C2, which is arranged between the varistor R4 and the rectifier bridge U1. The two AC input terminals of the rectifier bridge U1 are respectively electrically connected to the two ends of the safety capacitor C2, and the two ends of the safety capacitor C2 are also respectively electrically connected to the live wire and the neutral wire.

[0012] As a preferred solution, the control board also integrates a filter inductor L1, which is arranged between the safety capacitor C2 and the rectifier bridge U1. The two input terminals of the filter inductor L1 are respectively electrically connected to the two ends of the safety capacitor C2, and the two output terminals are respectively electrically connected to the two AC input terminals of the rectifier bridge U1.

[0013] The utility model arranges all control systems of the DC motor on the same control board, thereby improving the integration of the control system, being beneficial to the structural layout of the product and improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the control board circuit of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The utility model is described below in conjunction with the accompanying drawings and specific embodiments.

[0016] The food wall breaking machine comprises a mixing cup, a crushing blade arranged in the mixing cup, and a DC motor arranged outside the mixing cup and connected to the crushing blade for transmission. The DC motor is a brushless DC motor and its rated power is between 550W and 1450W.

[0017] like Figure 1As shown, the food wall breaking machine also includes a control board 20 arranged outside the mixing cup and electrically connected to the DC motor 10, the control board 20 includes a DC drive circuit 21, a speed control circuit 22, an energy storage capacitor C1, a rectifier bridge U1 and a safety capacitor C2; the positive electrode of the energy storage capacitor C1 is connected to the live wire, the negative electrode is connected to the neutral wire and grounded, the positive electrode of the energy storage capacitor C1 is connected to the IGBT crystal control tube Q1, the emitter of the IGBT crystal control tube Q1 is connected to the positive electrode of the energy storage capacitor C1, the control gate is connected to the speed control circuit 22, and the collector is electrically connected The DC drive circuit 21 is connected in parallel with the DC drive circuit 21 and the speed control circuit 22 at both ends of the energy storage capacitor C1. The output end of the DC drive circuit 21 is electrically connected to the DC motor 10. A speed control resistor R1 is connected in series between the speed control circuit 22 and the DC drive circuit 21. A control on-resistance R2 is connected in series between the control gate of the IGBT crystal control tube Q1 and the speed control circuit 22. A sampling resistor R3 is connected in series between the negative electrode of the energy storage capacitor C1 and the DC drive circuit 21. The speed control circuit 22 has its own grounding terminal for independent grounding. The positive electrode of the energy storage capacitor C1 is electrically connected to the DC output positive electrode of the rectifier bridge U1, and the negative electrode is electrically connected to the DC output negative electrode of the rectifier bridge U1. The two AC input terminals of the rectifier bridge U1 are electrically connected to the two ends of the safety capacitor C2 respectively, and the two ends of the safety capacitor C2 are electrically connected to the live wire and the neutral wire respectively.

[0018] In addition, Figure 1 As shown, the control board 20 also integrates a filter inductor L1, a fuse FUSE1, a varistor R4 and a thermistor R5. The filter inductor L1 is arranged between the safety capacitor C2 and the rectifier bridge U1. The two input terminals of the filter inductor L1 are respectively electrically connected to the two ends of the safety capacitor C2, and the two output terminals are respectively electrically connected to the two AC input terminals of the rectifier bridge U1. One end of the fuse FUSE1 is electrically connected to the live wire, and the other end is electrically connected to the safety capacitor C2. The varistor R4 is arranged between the fuse FUSE1 and the safety capacitor C2, and the two ends are respectively electrically connected to the live wire and the neutral wire. One end of the thermistor R5 is electrically connected to the neutral wire, and the other end is electrically connected to the varistor R4.

[0019] The control process of this embodiment is as follows: AC power AC / IN is input, the L stage passes through the fuse FUSE1, the N stage passes through the thermistor R5 for overcurrent protection, and then the two stages pass through the varistor R4 to suppress the power supply voltage. The AC power coming out of the varistor R4 is filtered by the safety capacitor C2 and the filter inductor L1 in turn to reduce electromagnetic interference. The AC power coming out of the filter inductor L1 enters the rectifier bridge U1, and after being rectified into DC power, it enters the energy storage capacitor C1 for DC power supply filtering and energy storage. The negative pole of the DC power is sent to the DC drive circuit 21 after current detection and sampling by the sampling resistor R3, and the positive pole of the DC power is controlled by the IGBT crystal control tube Q1 and distributed to the DC drive circuit 21 and the speed control circuit 22. The voltage of the control resistor R2 can control the operation of the DC drive circuit 21 by controlling the conduction of the IGBT crystal control tube Q1. At the same time, the speed control signal of the speed control circuit 22 can be adjusted and output to the DC drive circuit 21 through the speed control resistor R1, thereby realizing the control of the speed of the DC motor 10.

[0020] This embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. After reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A food wall breaking machine, comprising a mixing cup, a crushing blade arranged in the mixing cup, and a DC motor arranged outside the mixing cup and drivingly connected to the crushing blade, wherein the rated power of the DC motor is between 550W and 1450W; and further comprising a control board arranged outside the mixing cup and electrically connected to the DC motor, characterized in that: The control board integrates a DC drive circuit, a speed regulation circuit, an energy storage capacitor C1, an IGBT crystal control tube Q1, a fuse FUSE1, a varistor R4 and a thermistor R5. The output end of the DC drive circuit is electrically connected to a DC motor, the positive electrode of the energy storage capacitor C1 is connected to a live wire, the negative electrode is connected to a neutral wire and is grounded, the emitter of the IGBT crystal control tube Q1 is electrically connected to the positive electrode of the energy storage capacitor C1, the control grid is electrically connected to the speed regulation circuit, and the collector is electrically connected to the DC drive circuit, so that the DC drive circuit and the speed regulation circuit are connected in parallel to the two ends of the energy storage capacitor C1, one end of the fuse FUSE1 is electrically connected to the live wire, and the other end is electrically connected to the positive electrode of the energy storage capacitor C1, the varistor R4 is arranged between the fuse FUSE1 and the energy storage capacitor C1, and the two ends are electrically connected to the live wire and the neutral wire respectively, and the thermistor R5 is connected in series to the neutral wire, and one end is electrically connected to the neutral wire, and the other end is electrically connected to the varistor R4.

2. The food wall breaking machine according to claim 1, characterized in that: The control board is also integrated with a speed regulating resistor R1, which is connected in series between the speed regulating circuit and the DC drive circuit.

3. The food wall breaking machine according to claim 1 or 2, characterized in that: The speed control circuit is also independently grounded.

4. The food wall breaking machine according to claim 1, characterized in that: The control board is also integrated with a control resistor R2, which is connected in series between the control gate of the IGBT crystal control tube Q1 and the speed regulation circuit.

5. The food wall breaking machine according to claim 1, characterized in that: The control board is also integrated with a sampling resistor R3, which is connected in series between the negative electrode of the energy storage capacitor C1 and the DC drive circuit.

6. The food wall breaking machine according to claim 1, characterized in that: The control board also integrates a rectifier bridge U1, which is arranged between the energy storage capacitor C1 and the varistor R4. The positive electrode of the energy storage capacitor C1 is electrically connected to the DC output positive electrode of the rectifier bridge U1, and the negative electrode is electrically connected to the DC output negative electrode of the rectifier bridge U1.

7. The food wall breaking machine according to claim 6, characterized in that: The control board also integrates a safety capacitor C2, which is arranged between the varistor R4 and the rectifier bridge U1. The two AC input terminals of the rectifier bridge U1 are respectively electrically connected to the two ends of the safety capacitor C2, and the two ends of the safety capacitor C2 are also respectively electrically connected to the live wire and the neutral wire.

8. The food wall breaking machine according to claim 7, characterized in that: The control board also integrates a filter inductor L1, which is arranged between the safety capacitor C2 and the rectifier bridge U1. The two input terminals of the filter inductor L1 are respectively electrically connected to the two ends of the safety capacitor C2, and the two output terminals are respectively electrically connected to the two AC input terminals of the rectifier bridge U1.

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