Quantitative pumping device based on echelette grating pulse detection

Abstract

The utility model relates to the technical field of beverage dispensers, in particular to a constant delivery pumping device based on echelette grating pulse detection. A direct-current brush motor is mounted on the peristaltic pump, a control panel mounting plate is fixedly connected to the movable end of the direct-current brush motor, a control panel is fixedly connected to the inner bottom of the control panel mounting plate, an echelette grating sensor is mounted on the control panel, and a motor shell is fixedly connected to the upper end of the peristaltic pump; the direct-current brush motor is located in the motor shell, and the upper end of the motor shell is fixedly connected with an upper sealing cover. Through pulse counting of the direct-current brush motor and the echelette grating sensor, low-cost, high-torque and anti-pollution precise quantitative pumping is achieved, and the problem that in the prior art, a high-cost motor and a complex sensor are depended on is solved.

Description

Technical Field

[0001] This utility model relates to the field of beverage machine technology, specifically to a quantitative pump device based on infrared grating pulse detection. Background Technology

[0002] In the use of beverage machines such as milk tea machines and coffee machines, a pump device is used to deliver beverages in a measured quantity.

[0003] Existing beverage dispenser dispensing pumps are driven by stepper motors or brushless motors and controlled by photoelectric encoders. However, stepper motors are expensive, have insufficient torque at low speeds, and are prone to losing steps when dispensing high-viscosity liquids. Brushless motors require Hall effect sensors to detect rotor position, have complex control circuits, and are still more expensive than DC motors. Furthermore, the resolution of traditional photoelectric encoders depends on the code disk density, with high-precision encoders costing over 50 yuan and being susceptible to contamination from liquid splashes, affecting their use. As a result, current beverage dispenser dispensing pumps rely on high-cost motors and complex sensors. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a quantitative pumping device based on infrared grating pulse detection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A metering pump device based on infrared grating pulse detection includes:

[0007] Peristaltic pump;

[0008] The peristaltic pump is equipped with a DC brushed motor. A control board mounting plate is fixedly connected to the movable end of the DC brushed motor. A control board is fixedly connected to the bottom of the control board mounting plate. An infrared grating sensor is installed on the control board. A motor housing is fixedly connected to the upper end of the peristaltic pump. The DC brushed motor is located inside the motor housing. An upper sealing cover is fixedly connected to the upper end of the motor housing.

[0009] Preferably, the infrared grating sensor generates a pulse count signal by detecting the rotation of the pressure roller shaft on the peristaltic pump, and the control board calculates the output amount based on the pulse count and controls the DC brushed motor to stop rotating.

[0010] Preferably, the infrared grating sensor includes a metal grating sheet, on which twelve slots are evenly distributed, the width of which is 0.45-0.55mm.

[0011] Preferably, the control board includes a second-order low-pass filter circuit with a cutoff frequency of 1kHz, used to eliminate motor brush spark interference.

[0012] Preferably, the hose connected to the peristaltic pump is made of food-grade silicone, with an inner diameter of 6mm and a wall thickness of 1.5mm.

[0013] Preferably, the control board is equipped with a dynamic calibration unit that automatically updates the pulse-flow conversion coefficient when the actual liquid output deviates from the pulse calculation value by more than ±3%.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] This invention achieves low-cost, high-torque, and pollution-resistant precise quantitative pumping by using a DC brushed motor and an infrared grating sensor for pulse counting, thus solving the problem of existing technologies relying on high-cost motors and complex sensors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the quantitative pump device based on infrared grating pulse detection proposed in this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the exploded structure;

[0018] Figure 3 for Figure 1 A top view of the structure of the metal grating sheet.

[0019] In the diagram: 1. Peristaltic pump; 2. Motor housing; 3. Upper sealing cover; 4. DC brushed motor; 5. Control board mounting plate; 6. Control board; 7. Infrared grating sensor; 71. Metal grating sheet; 72. Slot. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-3 A quantitative pumping device based on infrared grating pulse detection includes a peristaltic pump 1, a DC brushed motor 4 mounted on the peristaltic pump 1, a control board mounting plate 5 fixedly connected to the movable end of the DC brushed motor 4, a control board 6 fixedly connected to the bottom of the control board mounting plate 5, an infrared grating sensor 7 mounted on the control board 6, a motor housing 2 fixedly connected to the upper end of the peristaltic pump 1, the DC brushed motor 4 located inside the motor housing 2, and an upper sealing cover 3 fixedly connected to the upper end of the motor housing 2.

[0022] The infrared grating sensor 7 generates a pulse count signal by detecting the rotation of the pressure roller shaft on the peristaltic pump 1. The control board 6 calculates the output amount based on the pulse count and controls the DC brushed motor 4 to stop rotating. Furthermore, the stall torque of the DC brushed motor 4 is more than 20% greater than the rated torque of a stepper motor of the same power.

[0023] The infrared grating sensor 7 includes a metal grating sheet 71, on which twelve slots 72 are evenly distributed, and the width of the slots 72 is 0.45-0.55mm.

[0024] The control board 6 includes a second-order low-pass filter circuit with a cutoff frequency of 1kHz, used to eliminate motor brush spark interference.

[0025] The hose connected to the peristaltic pump 1 is made of food-grade silicone, with an inner diameter of 6mm and a wall thickness of 1.5mm.

[0026] The control board 6 is equipped with a dynamic calibration unit that automatically updates the pulse-flow conversion coefficient when the actual output volume deviates from the pulse calculation value by more than ±3%.

[0027] This invention achieves low-cost, high-torque, and pollution-resistant precise quantitative pumping by using a DC brushed motor 4 and an infrared grating sensor 7 for pulse counting, thus solving the problem of existing technologies relying on high-cost motors and complex sensors.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quantitative dosing device based on infrared grating pulse detection, characterized in that Include: Peristaltic pump (1); The direct current brush motor (4) is movably connected with the control panel mounting plate (5), the control panel mounting plate (5) is fixedly connected with the control panel (6) in the bottom, the infrared grating sensor (7) is installed on the control panel (6), the motor housing (2) is fixedly connected with the upper end of the peristaltic pump (1), the direct current brush motor (4) is located in the motor housing (2), and the upper end of the motor housing (2) is fixedly connected with the upper sealing cover (3).

2. The quantitative dosing device based on infrared grating pulse detection according to claim 1, characterized in that, The infrared grating sensor (7) generates a pulse number signal by detecting the rotation of the pressure roller shaft of the peristaltic pump (1), and the control panel (6) calculates the amount of material according to the pulse number and controls the direct current brush motor (4) to stop rotating.

3. The quantitative dosing device based on infrared grating pulse detection according to claim 1, characterized in that, The infrared grating sensor (7) includes a metal grating sheet (71), and twelve slots (72) are uniformly arranged on the metal grating sheet (71), and the width of the slot (72) is 0.45-0.55mm.

4. The quantitative dosing device based on infrared grating pulse detection according to claim 1, characterized in that, The control panel (6) includes a second-order low-pass filter circuit with a cutoff frequency of 1kHz, which is used to eliminate motor brush spark interference.

5. The quantitative dosing device based on infrared grating pulse detection according to claim 1, characterized in that, The hose connected to the peristaltic pump (1) is made of food-grade silica gel material, with an inner diameter of 6mm and a wall thickness of 1.5mm.

6. The infrared grating pulsed detection based dosing device of claim 1, wherein, The control panel (6) is provided with a dynamic calibration unit, when the actual liquid output and the pulse calculation value deviation exceeds ±3%, the pulse-flow conversion coefficient is automatically updated.

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