Control system of bubble water generating device

Abstract

The utility model discloses a control system of a bubble water generating device, which comprises a power supply module, a driving module, a main control module and a monitoring module, the power supply module is connected with the driving module and the main control module, the input end of the power supply module is connected with a 220V alternating-current power supply, the output end of the power supply module outputs three-phase alternating-current voltage and direct-current voltage, the direct-current voltage is used for providing working voltage for the main control module, and the alternating-current voltage is used for providing working voltage for the driving module; the driving module is used for mixing gas and water; the main control module is also connected with the monitoring module and the driving module, and the main control module is used for receiving a monitoring signal of the monitoring module and controlling the frequency of the three-phase alternating current power supply output by the power supply module; and the monitoring module is used for monitoring the driving module and feeding back a signal to the main control module. The rotating speed of the motor can be accurately controlled, so that the working state of the gas-liquid mixing pump is adjusted, and high-efficiency and high-dissolved-oxygen-rate bubble water preparation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bubble water, in particular to a control system for a bubble water generating device. Background Art

[0002] The bubble water generator is a device used to make bubble water. It uses compressed gas in a gas cylinder to press the gas into the water at high pressure to saturate the gas and generate bubbles. The gas-liquid mixing pump is a key component of the bubble water generator.

[0003] Existing bubble water generating devices are suitable for various occasions where gas and liquid need to be mixed, such as oxygenation in aquaculture, oxygen therapy in medical care, and gas transportation and mixing in chemical processes. These applications usually require that the gas can be fully dissolved in the liquid to improve the gas utilization efficiency or ensure the smooth progress of the chemical reaction.

[0004] Traditional bubble water generating devices generally rely on mechanical adjustment means for adjustment, that is, by adjusting the speed of the pump or changing the channel structure of the gas and liquid to achieve the purpose of controlling the gas-liquid mixing ratio; specifically, the pump speed is adjusted by mechanical adjustment means such as belt drive, gear drive or torque converter. The mechanical adjustment means has the problem of relatively low adjustment accuracy. If the gas-liquid mixing ratio is adjusted by adjusting the opening size of the valve to change the gas and liquid channel structure, the valve is generally adjusted manually, resulting in a slow adjustment response speed.

[0005] Therefore, how to provide a bubble water generating device with high adjustment accuracy and fast adjustment response speed is a technical problem that urgently needs to be solved. Utility Model Content

[0006] The purpose of the utility model is to provide a bubble water generating device to solve the problems of low adjustment accuracy and slow adjustment response speed of the existing bubble water generating device in the background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a control system for a bubble water generating device, comprising a power supply module, a drive module, a main control module and a monitoring module; wherein the power supply module is connected to the drive module and the main control module; the input end of the power supply module is connected to a 220V AC power supply, and the output end outputs a three-phase AC voltage and a DC voltage, wherein the DC voltage is used to provide a working voltage for the main control module, and the AC voltage provides a working voltage for the drive module; the drive module is used to mix gas and water; the main control module is also connected to the detection module and the drive module, and the main control module is used to receive a monitoring signal from the monitoring module, and is used to control the frequency of the three-phase AC power output by the power supply module; the monitoring module is used to monitor the drive module and feed the signal back to the main control module.

[0008] Optionally, the power supply module is a frequency converter, and an output end of the frequency converter is connected to the drive module and the main control module.

[0009] Optionally, the driving module includes a three-phase AC motor connected to a frequency converter, a gas-liquid mixing pump connected to the output end of the three-phase AC motor, the inlet end of the gas-liquid mixing pump is connected to a liquid inlet pipe and an air inlet pipe, and the liquid inlet pipe and the air inlet pipe are connected to the monitoring module and the main control module.

[0010] Optionally, the three-phase AC motor and the frequency converter are connected in a delta connection.

[0011] Optionally, the monitoring module includes a water pressure sensor located on the liquid inlet pipe and an air pressure sensor located on the air inlet pipe.

[0012] Optionally, the water pressure sensor is located at the orifice of the liquid inlet pipe, and the air pressure sensor is located at the orifice of the air inlet pipe.

[0013] Optionally, the output pipeline of the gas-liquid mixing pump is connected with a return pipe, and the return pipe is connected with the liquid inlet pipe.

[0014] Optionally, the water pressure sensor and the air pressure sensor are both connected to an AD converter, and the AD converter is connected to a main control module.

[0015] Optionally, the main control module includes a single chip microcomputer connected to an AD converter and a frequency converter, and a first flow valve and a second flow valve connected to the single chip microcomputer, wherein the first flow valve is located on the liquid inlet pipe, and the second flow valve is located on the air inlet pipe.

[0016] Optionally, the single chip microcomputer is connected to a human-computer interaction display screen.

[0017] Compared with the prior art, the utility model provides a control system for a bubble water generating device, which has the following beneficial effects:

[0018] The control system of the bubble water generating device converts 220V AC power into DC power for the main control module according to demand. The main control module controls the three-phase AC output frequency of the power module through the signal of the monitoring module, thereby changing the working power output of the driving module, so that the generating device can be quickly adjusted, and through the setting of the monitoring module, data support is provided to the control module, thereby improving the control accuracy of the control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the layout of the control system of the utility model.

[0020] Markings in the figure: 1. Frequency converter; 2. Three-phase AC motor; 3. Gas-liquid mixing pump; 4. Liquid inlet pipe; 5. Air inlet pipe; 6. Water pressure sensor; 7. Air pressure sensor; 8. Return pipe; 9. AD converter; 10. Single-chip microcomputer; 11. First flow valve; 12. Second flow valve. DETAILED DESCRIPTION

[0021] The following is a detailed description in conjunction with the accompanying drawings and specific implementations. In the following description, many specific details are set forth to facilitate a full understanding of the present utility. However, the present utility can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present utility, so the present utility is not limited by the specific embodiments disclosed below.

[0022] A bubble water generating device control system of the present application can be applied to occasions such as the control of a bubble water generating device, and of course can also be used in other similar application scenarios. A bubble water generating device control system is described in detail below.

[0023] See attached Figure 1 As shown, a structural schematic diagram of a preferred embodiment of a control system for a bubble water generating device of the present application is shown. The control system for a bubble water generating device includes four modules: a power module, a drive module, a main control module, and a monitoring module. Compared with the existing control system that is manually adjusted, the present application simplifies the structural design through the four modules, making the adjustment process simpler, as described in detail as follows:

[0024] The power supply module includes a frequency converter 1, the input end of which is connected to a 220V AC power supply, and the output end of which outputs a stable DC voltage and a three-phase AC voltage, wherein the stable DC voltage is used as the working voltage of the main control module, and the frequency of the three-phase AC voltage is controlled by the control module, and the drive module is controlled to adjust by different output frequencies.

[0025] The driving module includes a three-phase AC motor 2 and a gas-liquid mixing pump 3 connected to the output end of the three-phase AC motor 2; wherein the three-phase AC motor 2 is connected to the three-phase AC voltage output by the inverter 1 through a triangle connection, so that the difference between the three power phase voltages is reduced, the starting current of the motor is reduced, the impact of the power grid is reduced, and the currents of the three coils affect each other, so that the operation of the three-phase AC motor is more stable, the continuity and stability of the bubble water generation process are guaranteed, and the efficiency of the motor is improved; the output end of the three-phase AC motor 2 is connected to the gas-liquid mixing pump 3, so that the flow rate and pressure of the gas-liquid mixing pump 3 can be adjusted by changing the rotation speed of the three-phase AC motor 2, so that the gas-liquid mixing pump 3 produces bubble water with high oxygen content and uniform bubble mixing.

[0026] The inlet end of the gas-liquid mixing pump 3 is connected to a liquid inlet pipe 4 and an air inlet pipe 5 , which are connected to the monitoring module. The output pipeline of the gas-liquid mixing pump 3 is connected to a return pipe 8 , which is connected to the liquid inlet pipe 4 .

[0027] The main control module includes a single-chip microcomputer 10 connected to an AD converter 9 and a frequency converter 1, and a first flow valve 11 and a second flow valve 12 connected to the single-chip microcomputer 10, wherein the first flow valve 11 is located on the liquid inlet pipe 4, and the second flow valve 12 is located on the air inlet pipe 5. The single-chip microcomputer 10 is connected to a human-computer interactive display screen, so that the user can set parameters, monitor the operating status, etc.; the flow of water and gas can be changed by the first flow valve 11 and the second flow valve 12.

[0028] The monitoring module includes a water pressure sensor 6 located on the liquid inlet pipe 4 and an air pressure sensor 7 located on the air inlet pipe 5, wherein the water pressure sensor 6 and the air pressure sensor 7 are both located at the pipe mouth and are connected to an AD converter 9 to convert the analog signal of the sensor into a digital signal that can be received by the single-chip microcomputer 10, so as to monitor the pressure of the liquid inlet pipe 4 and the air inlet pipe 5. The intelligent control of the single-chip microcomputer 10 greatly improves the convenience of operation and reduces the risk of human error.

[0029] It should be particularly noted that the length of the pipeline from the connection position of the return pipe 8 and the water inlet pipe to the gas-liquid mixing pump 3 is greater than the conduit distance from the installation position of the water pressure sensor 6 to the gas-liquid mixing pump 3; the first flow valve 11 is located between the gas-liquid mixing pump 3 and the water pressure sensor 6, and the second flow valve 12 is located between the gas-liquid mixing pump 3 and the air pressure sensor 7. By limiting the positions of the first flow valve 11 and the second flow valve 12, the first flow valve 11 and the second flow valve 12 can cut off the pipeline, ensuring that the air pressure sensor 7 can always monitor the air pressure and ensure that the water pressure bed can always monitor the water pressure.

[0030] It should be noted that the control system is also equipped with safety measures such as integrated overload protection, short circuit protection and leakage protection to prevent the equipment from continuing to operate under abnormal conditions and ensure the safety of the equipment and operators. Integrated overload protection, short circuit protection and leakage protection are all existing technologies and will not be described in detail here.

[0031] See attached Figure 1 As shown, the control process of the utility model is as follows:

[0032] The user sets the parameters of the single-chip microcomputer 10 through the human-computer interaction display screen, and then starts the device; because the water pressure and air pressure will change, the water pressure sensor 6 and the air pressure sensor 7 need to transmit the signal to the single-chip microcomputer 10 in real time through the AD converter 9. The single-chip microcomputer 10 obtains the result through the PID algorithm, and controls the three-phase voltage frequency output by the inverter 1 to change according to the result, so that the flow and pressure of the gas-liquid mixing pump 3 change, and the single-chip microcomputer 10 controls the valve opening of the first flow valve 11 and the second flow valve 12 to change, so as to ensure the quality of the bubble water. It should be noted that the PID algorithm is a prior art and will not be repeated here.

[0033] Specifically, when the flow rate or pressure deviates from the set value, the water pressure sensor 6 and the air pressure sensor 7 transmit data to the single-chip microcomputer 10 through the AD converter 9. The single-chip microcomputer 10 obtains the result according to the PID algorithm, and then adjusts the output frequency of the inverter 1 according to the result, controls the three-phase AC motor to drive the gas-liquid mixing pump 3 to adjust, thereby adjusting the flow rate and pressure of the gas-liquid mixing pump 3. At the same time, the single-chip microcomputer 10 controls the opening of the first flow valve 11 and the second flow valve 12 to adjust, and the adjustment is also based on the result of the PID algorithm.

[0034] Specifically, when the flow rate of gas and liquid, and / or the pressure of gas and liquid are lower than the set value, the single chip computer 10 will increase the speed of the gas-liquid mixing pump 3 or increase the opening of the valve through the PID algorithm, thereby increasing the flow rate and / or the pressure; if the flow rate of gas and liquid, and / or the pressure of gas and liquid are higher than the set value, the speed of the gas-liquid mixing pump 3 will be reduced or the opening of the valve will be increased.

[0035] It should be noted that the entire adjustment process in the present application is a continuous feedback loop process, and the single chip microcomputer 10 continuously receives the latest pressure and flow data, calculates the deviation, and continuously increases the frequency output by the frequency converter 1, so that the system reaches or maintains the set working point. The control method of the present application ensures the flexibility and accuracy of the system, and can automatically adjust according to the flow rate of gas and liquid, and the pressure of gas and liquid, thereby ensuring the quality of the bubble water.

[0036] The above embodiments are intended to illustrate the present application, not to limit the present application. Any solution that is a simple transformation of the present application falls within the protection scope of the present application.

Claims

1. A control system for a bubble water generating device, characterized in that: Including power module, drive module, main control module and monitoring module; The power module is connected to the drive module and the main control module. The input end of the power module is connected to a 220V AC power supply, and the output end outputs a three-phase AC voltage and a DC voltage. The DC voltage is used to provide a working voltage for the main control module, and the AC voltage provides a working voltage for the drive module. The driving module is used to mix gas and water; The main control module is also connected to the monitoring module and the driving module. The main control module is used to receive the monitoring signal of the monitoring module and to control the frequency of the three-phase AC power output by the power module; The monitoring module is used to monitor the driving module and feed back the signal to the main control module.

2. The control system of the bubble water generating device according to claim 1, characterized in that: The power supply module is a frequency converter, and the output end of the frequency converter is connected to the drive module and the main control module.

3. The control system of the bubble water generating device according to claim 2, characterized in that: The driving module includes a three-phase AC motor connected to a frequency converter, and a gas-liquid mixing pump connected to the output end of the three-phase AC motor. The inlet end of the gas-liquid mixing pump is connected to a liquid inlet pipe and an air inlet pipe, which are connected to the monitoring module and the main control module.

4. The control system of the bubble water generating device according to claim 3, characterized in that: The three-phase AC motor and the frequency converter are connected in a delta connection.

5. The control system of the bubble water generating device according to claim 3, characterized in that: The monitoring module includes a water pressure sensor located on the liquid inlet pipe and an air pressure sensor located on the air inlet pipe.

6. The control system of the bubble water generating device according to claim 5, characterized in that: The water pressure sensor is located at the pipe opening of the liquid inlet pipe, and the air pressure sensor is located at the pipe opening of the air inlet pipe.

7. The control system of the bubble water generating device according to claim 5, characterized in that: The output pipeline of the gas-liquid mixing pump is connected with a return pipe, and the return pipe is connected with the liquid inlet pipe.

8. The control system of the bubble water generating device according to claim 5, characterized in that: The water pressure sensor and the air pressure sensor are both connected to an AD converter, and the AD converter is connected to a main control module.

9. The control system of the bubble water generating device according to claim 2 or 8, characterized in that: The main control module includes a single chip microcomputer connected to an AD converter and a frequency converter, and a first flow valve and a second flow valve connected to the single chip microcomputer. The first flow valve is located on the liquid inlet pipe, and the second flow valve is located on the air inlet pipe.

10. The control system of the bubble water generating device according to claim 9, characterized in that: The single chip microcomputer is connected to a human-computer interaction display screen.

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