Water purification system and control method

Abstract

The present application relates to water purification treatment technical field, disclose a kind of water purification system and control method, water purification system includes sequentially being arranged on the electric pressure reducing valve, pressure detection meter and booster pump in water inlet pipeline along water flow direction, electric pressure reducing valve and pressure detection meter signal connection;It further includes frequency conversion air inlet pump and gas flowmeter sequentially being arranged on the air inlet pipeline along airflow direction, frequency conversion air inlet pump and gas flowmeter signal connection, air inlet pipeline is connected between electric pressure reducing valve and booster pump;It further includes flow regulating valve being arranged on the backflow pipeline, the first end of backflow pipeline is connected to the downstream of booster pump, second end is connected to the upstream of electric pressure reducing valve;It further includes micro-bubble water assembly being arranged on the micro-bubble water pipeline, micro-bubble water pipeline is connected to the downstream of booster pump, and micro-bubble water assembly includes flowmeter, and flowmeter is signal connected with flow regulating valve.The water purification system can make the water gas ratio of micro-bubble water in the optimal range, and micro-bubble water flow can also be adjusted.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a water purification system and control method. Background Technology

[0002] Microbubble water has excellent cleaning properties and can be widely used in water purifiers for domestic water use. The three essential elements for achieving microbubble water are: gas, water, and pressure. Current technologies mainly employ two methods to achieve the microbubble water effect: active air intake with an air pump and passive air intake with a booster pump using a flow-limiting valve. Compared to passive air intake, active air intake with an air pump can better control the air volume, ensuring a consistent and stable microbubble water effect. However, active air intake with an air pump is significantly affected by tap water pressure. Fluctuations in tap water pressure affect the air volume of the air pump, leading to large fluctuations in the water-to-air ratio, often resulting in problems such as excessive airflow or weak bubbles. Furthermore, current designs have a fixed microbubble water flow rate, preventing users from selecting the flow rate, which limits usability and leads to a poor user experience.

[0003] Therefore, there is an urgent need for a water purification system and control method to solve the above problems. Summary of the Invention

[0004] One objective of this invention is to provide a water purification system that not only avoids large fluctuations in the water-to-air ratio of microbubble water, ensuring that the water-to-air ratio remains within the optimal range during microbubble water operation, but also allows for adjustment of the microbubble water flow rate.

[0005] Based on the above concept, the technical solution adopted by this invention is as follows:

[0006] A water purification system is provided, comprising an electric pressure reducing valve, a pressure sensor and a booster pump arranged sequentially along the water flow direction on an inlet pipe, wherein the electric pressure reducing valve and the pressure sensor are signal-connected.

[0007] The water purification system also includes a variable frequency air intake pump and a gas flow meter arranged sequentially along the airflow direction on the air intake pipe. The variable frequency air intake pump and the gas flow meter are signal connected, and the air intake pipe is connected between the electric pressure reducing valve and the booster pump.

[0008] The water purification system also includes a flow regulating valve installed on the return pipeline, the first end of the return pipeline being connected to the downstream of the booster pump, and the second end of the return pipeline being connected to the upstream of the electric pressure reducing valve;

[0009] The water purification system also includes a microbubble water assembly installed on a microbubble water pipeline. The microbubble water pipeline is connected to the downstream of the booster pump. The microbubble water assembly includes a flow meter, which is signal-connected to the flow regulating valve.

[0010] Optionally, a degassing component is provided on the return pipeline to prevent gas downstream of the electric pressure reducing valve from returning to the upstream of the electric pressure reducing valve through the return pipeline.

[0011] Optionally, the variable frequency intake pump is connected to the pressure sensor via a signal connection.

[0012] Optionally, a first check valve is also provided on the intake pipe, and the first check valve is located downstream of the gas flow meter.

[0013] Optionally, an inlet valve is provided on the inlet pipe, the inlet valve is located upstream of the electric pressure reducing valve, and the second end is connected between the inlet valve and the electric pressure reducing valve.

[0014] Optionally, a pretreatment filter element is also provided on the water inlet pipe, and the pretreatment filter element is located upstream of the water inlet valve.

[0015] Optionally, the microbubble water assembly further includes a mixing tank located downstream of the flow meter, the mixing tank being used to mix the gas and liquid entering the mixing tank.

[0016] Optionally, the water purification system further includes a membrane filter element, which has an inlet, a pure water outlet, and a concentrated water outlet. The inlet is connected to the downstream of the booster pump. After the raw water is filtered by the membrane filter element, it is divided into pure water and concentrated water. The pure water is discharged through the pure water outlet, and the concentrated water is discharged through the concentrated water outlet.

[0017] Optionally, the water-to-air ratio of the microbubble water ranges from 20 to 100.

[0018] Another objective of this invention is to provide a control method that not only avoids large fluctuations in the water-to-air ratio of microbubble water in a water purification system, ensuring that the water-to-air ratio remains within the optimal range during microbubble water operation, but also allows for the adjustment of the microbubble water flow rate.

[0019] Based on the above concept, the technical solution adopted by this invention is as follows:

[0020] A control method is provided for application to the aforementioned water purification system, the control method comprising the following steps:

[0021] Receive the target microbubble water flow rate L and confirm the target gas flow rate Q within the optimal water-to-gas ratio range M.

[0022] The flow meter obtains the real-time microbubble water flow rate L1 and adjusts the flow regulating valve based on the difference between the real-time microbubble water flow rate L1 and the target microbubble water flow rate L.

[0023] The gas flow meter obtains the real-time gas flow rate Q1 and adjusts the variable frequency gas pump based on the difference between the real-time gas flow rate Q1 and the target gas flow rate Q.

[0024] The pressure gauge obtains the real-time intake pressure P1 between the electric pressure reducing valve and the booster pump, and adjusts the electric pressure reducing valve based on the difference between the real-time intake pressure P1 and the preset target intake pressure P.

[0025] The beneficial effects of this invention are as follows:

[0026] The water purification system proposed in this invention includes an electric pressure reducing valve, a pressure gauge, and a booster pump sequentially arranged along the water flow direction on the inlet pipe, with the electric pressure reducing valve and the pressure gauge connected by a signal. It also includes a variable frequency air intake pump and a gas flow meter sequentially arranged along the airflow direction on the air intake pipe, with the variable frequency air intake pump and the gas flow meter connected by a signal. The air intake pipe connects to the electric pressure reducing valve and the booster pump. The water purification system also includes a flow regulating valve arranged on the return pipe, with one end connected to the downstream of the booster pump and the second end connected to the upstream of the electric pressure reducing valve. The water purification system further includes a microbubble water assembly arranged on a microbubble water pipeline, which connects to the downstream of the booster pump. The microbubble water assembly includes a flow meter, which is connected by a signal to the flow regulating valve. This water purification system presets an optimal water-to-air ratio M and multiple target microbubble water flow rates L. The user can select a target microbubble water flow rate L, and by setting the flow meter and the return pipe, the real-time microbubble water flow rate L1 is made to match the target microbubble water flow rate L. In addition, by installing a variable frequency air intake pump, a gas flow meter, an electric pressure reducing valve, and a pressure sensor, not only can the power of the variable frequency air intake pump be adjusted, but also the real-time air intake pressure P1 can be adjusted to ensure that the real-time air intake flow rate Q1 meets the target air intake flow rate Q, thereby avoiding large fluctuations in the water-to-gas ratio of the microbubble water and keeping the water-to-gas ratio within the optimal range during the operation of the microbubble water.

[0027] The control method proposed in this invention is applicable to the aforementioned water purification system. The control method includes the following steps: receiving the target microbubble water flow rate L, and confirming the target gas flow rate Q within the optimal water-to-gas ratio M range; a flow meter acquires the real-time microbubble water flow rate L1, and adjusts the flow regulating valve based on the difference between the real-time microbubble water flow rate L1 and the target microbubble water flow rate L; a gas flow meter acquires the real-time gas flow rate Q1, and adjusts the variable frequency air pump based on the difference between the real-time gas flow rate Q1 and the target gas flow rate Q; a pressure sensor acquires the real-time air intake pressure P1 between the electric pressure reducing valve and the booster pump, and adjusts the electric pressure reducing valve based on the difference between the real-time air intake pressure P1 and the preset target air intake pressure P. This control method not only avoids large fluctuations in the water-to-gas ratio of the microbubble water in the water purification system, ensuring that the water-to-gas ratio remains within the optimal range during microbubble water operation, but also allows for the adjustment of the microbubble water flow rate. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the water purification system provided in an embodiment of the present invention;

[0029] Figure 2 This is a partial flowchart of the control method provided in an embodiment of the present invention;

[0030] Figure 3 This is another part of the flowchart of the control method provided in the embodiments of the present invention.

[0031] In the picture:

[0032] 101. Pretreatment filter element; 102. Inlet valve; 103. Electric pressure reducing valve; 104. Pressure gauge; 105. Booster pump; 106. Variable frequency air pump; 107. Gas flow meter; 108. First check valve; 109. Second check valve; 110. Flow regulating valve; 111. Degassing assembly; 112. Flow meter; 113. Mixing tank; 114. Outlet solenoid valve; 115. Aerator; 116. Membrane filter element; 117. Detection switch; 118. Wastewater valve;

[0033] 201. Water inlet pipe; 202. Air inlet pipe; 203. Return pipe; 2031. First end; 2032. Second end; 204. Microbubble water pipe;

[0034] 301. Microbubble inlet; 302. Pure water inlet. Detailed Implementation

[0035] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] This embodiment provides a water purification system, including a connected air inlet pipe 202, a water inlet pipe 201, and a microbubble water pipe 204. The air inlet pipe 202 provides gas, and the water inlet pipe 201 provides water. Gas and water at a certain pressure mix in the microbubble water pipe 204 to form microbubble water. The water purification system also includes a return pipe 203. When the microbubble water flow rate exceeds a preset amount, some water can flow to the return pipe 203 instead of entering the microbubble water pipe 204, thereby regulating the microbubble water flow rate. This water purification system not only avoids large fluctuations in the water-to-air ratio of the microbubble water, ensuring that the water-to-air ratio remains within the optimal range during operation, but also allows for the regulation of the microbubble water flow rate.

[0041] like Figure 1As shown, an electric pressure reducing valve 103, a pressure gauge 104, and a booster pump 105 are sequentially installed along the water flow direction on the water inlet pipe 201. The electric pressure reducing valve 103 and the pressure gauge 104 are connected by signal. A variable frequency air pump 106 and a gas flow meter 107 are sequentially installed along the airflow direction on the air inlet pipe 202. The variable frequency air pump 106 and the gas flow meter 107 are connected by signal. The air inlet pipe 202 connects to the electric pressure reducing valve 103 and the booster pump 105. A flow regulating valve 110 is installed on the return pipe 203. The first end 2031 of the return pipe 203 connects to the downstream of the booster pump 105, and the second end 2032 connects to the upstream of the electric pressure reducing valve 103. A microbubble water assembly is installed on the microbubble water pipe 204. The microbubble water assembly, including a flow meter 112, connects to the downstream of the booster pump 105 and is connected by signal to the flow regulating valve 110.

[0042] In practical implementation, the optimal water-to-air ratio M and the multiple selectable target microbubble water flow rates L of the water purification system are preset at the factory. The water-to-air ratio = microbubble water flow rate / gas flow rate. Users can select from multiple target microbubble water flow rates L. When a user selects a target microbubble water flow rate L, the target gas flow rate Q can be confirmed according to the water-to-air ratio = microbubble water flow rate / gas flow rate. When the water purification system is working, the flow meter 112 installed on the microbubble water pipeline 204 can detect the microbubble water flow rate in real time. If the real-time microbubble water flow rate L1 is greater than the target microbubble water flow rate L, the return pipeline 203 is opened, and the water flow rate in the return pipeline 203 is L0, where L0 = L1 - L. The flow meter 112 is signal-connected to the flow regulating valve 110. The opening degree of the flow regulating valve 110 can be adjusted according to the difference between the real-time microbubble water flow rate L1 detected by the flow meter 112 and the target microbubble water flow rate L. In this embodiment, the flow regulating valve 110 is an electric ball valve.

[0043] In practice, since the target gas flow rate Q has been confirmed, the gas flow meter 107 installed on the intake pipe 202 can detect the gas flow rate in real time. If the real-time gas flow rate Q1 is greater than the target gas flow rate Q, the power of the variable frequency intake pump 106 is reduced to decrease the real-time gas flow rate Q1 until the real-time gas flow rate Q1 meets the target intake flow rate Q, that is, the actual water-to-gas ratio M1 = real-time microbubble water flow rate L1 / real-time gas flow rate Q1 and M1 ∈ M. If the real-time gas flow rate Q1 is less than the target gas flow rate Q, the power of the variable frequency intake pump 106 is increased to increase the real-time gas flow rate Q1 until the real-time gas flow rate Q1 meets the target intake flow rate Q, that is, the actual water-to-gas ratio M1 = real-time microbubble water flow rate L1 / real-time gas flow rate Q1 and M1 ∈ M.

[0044] In this embodiment, a pressure gauge 104 is positioned between the electric pressure reducing valve 103 and the booster pump 105. The pressure gauge 104 can detect the inlet pressure between the electric pressure reducing valve 103 and the booster pump 105 in real time. When there are fluctuations in tap water pressure and pressure fluctuations in the return water after the user selects the target microbubble water flow rate L, the pressure gauge 104 detects the real-time inlet pressure P1 between the electric pressure reducing valve 103 and the booster pump 105. When the real-time inlet pressure P1 does not meet the target inlet pressure P, the opening of the electric pressure reducing valve 103 is adjusted to ensure that the real-time inlet pressure P1 meets the target inlet pressure P, which is a suitable pressure for easy air intake. Furthermore, within the range of the target inlet pressure P, if it is necessary to further increase the real-time inlet flow rate Q1, the real-time inlet pressure P1 can be decreased; conversely, if it is necessary to further decrease the real-time inlet flow rate Q1, the real-time inlet pressure P1 can be increased.

[0045] Optionally, the water-to-air ratio ranges from 20 to 100. That is, microbubble water can be generated when the water-to-air ratio is within this range. The closer the water-to-air ratio is to the median value, the smaller the fluctuation and the more stable the effect of microbubble water. The optimal water-to-air ratio M of the water purification system can be set as a range value according to this principle.

[0046] Optionally, the variable frequency intake pump 106 is signal-connected to the pressure sensor 104. In addition to the signal connection between the variable frequency intake pump 106 and the gas flow meter 107, the variable frequency intake pump 106 can also be associated with the pressure sensor 104. When the real-time intake flow rate Q1 does not meet the target intake flow rate Q, the power of the variable frequency intake pump 106 can be adjusted. However, since the gas flow rate is also affected by the intake pressure, the power adjustment fed back from the gas flow meter 107 to the variable frequency intake pump 106 can also be corrected based on the real-time intake pressure P1 detected by the pressure sensor 104 between the electric pressure reducing valve 103 and the booster pump 105, so that the real-time intake flow rate Q1 can be quickly adjusted to meet the target intake flow rate Q.

[0047] Optionally, a degassing component 111 is provided on the return pipeline 203. The degassing component 111 is used to prevent gas downstream of the electric pressure reducing valve 103 from returning to the upstream of the electric pressure reducing valve 103 through the return pipeline 203. The first end 2031 of the return pipeline 203 is connected to the downstream of the booster pump 105. By providing the degassing component 111 on the return pipeline 203, only liquid can return, while gas cannot return to the water inlet pipeline 201, thus ensuring the accuracy of the water-gas ratio calculation.

[0048] Optionally, a second check valve 109 is also provided on the return pipe 203. The second check valve 109 is used to limit the liquid in the return pipe 203 to flow only from the first end 2031 to the second end 2032 in the return pipe 203, so as to prevent the raw water in the inlet pipe 201 from being diverted upstream of the electric pressure reducing valve 103 and thus entering the return pipe 203 in reverse.

[0049] Optionally, a first check valve 108 is also provided on the air inlet pipe 202, and the first check valve 108 is located downstream of the gas flow meter 107. The first check valve 108 is used to prevent liquid in the water inlet pipe 201 from flowing back to the variable frequency air inlet pump 106, so as to ensure the performance of the variable frequency air inlet pump 106.

[0050] Optionally, an inlet valve 102 is also installed on the inlet pipe 201. The inlet valve 102 is located upstream of the electric pressure reducing valve 103, and the second end 2032 of the return pipe 203 is connected between the inlet valve 102 and the electric pressure reducing valve 103. The inlet valve 102 is an on / off valve. When the inlet valve 102 is open, raw water can enter the inlet pipe 201 and then flow through the electric pressure reducing valve 103, the booster pump 105, etc. in sequence. When the inlet valve 102 is closed, raw water cannot enter the inlet pipe 201, and the entire water purification system is in a closed state.

[0051] Optionally, a pretreatment filter element 101 is also installed on the inlet pipe 201, located upstream of the inlet valve 102. The pretreatment filter element 101 can filter the raw water entering the inlet pipe 201, removing large suspended particles such as sediment from the raw water. This prevents impurities in the raw water from entering components such as the inlet valve 102 and the electric pressure reducing valve 103, thus avoiding damage to the components of the water purification system and effectively extending the service life of the entire water purification system.

[0052] Furthermore, the microbubble water assembly also includes a mixing tank 113, which is located downstream of the flow meter 112. The mixing tank 113 is used to mix the gas and liquid entering the mixing tank 113. After entering the water inlet pipe 201, the gas will pass through the booster pump 105 and the flow meter 112 along with the water before entering the mixing tank 113, where it will be further mixed. The pressurized gas and water in the mixing tank 113 will then mix to form microbubble water.

[0053] Optionally, the microbubble water assembly also includes a water outlet solenoid valve 114, which is an on / off valve. When the water outlet solenoid valve 114 is opened, microbubble water can be discharged from the microbubble water pipeline 204 for user use.

[0054] Optionally, the microbubble water assembly also includes an aerator 115, located downstream of the mixing tank 113. The aerator 115 is used to fully mix the flowing gas and liquid to create a foaming effect. In practice, the aerator 115 is typically installed on a faucet, placing it at the end of the microbubble water assembly. The water outlet solenoid valve 114 is located between the mixing tank 113 and the aerator 115. The aerator 115 is connected to the microbubble water outlet 301 of the water purification system, allowing the microbubble water to flow out of the water purification system through the microbubble water outlet 301 after passing through the aerator 115.

[0055] Furthermore, the water purification system also includes a membrane filter element 116, which has an inlet, a pure water outlet, and a concentrated water outlet. The inlet is connected downstream of the booster pump 105. After the raw water is filtered by the membrane filter element 116, it is divided into pure water and concentrated water. The pure water is discharged through the pure water outlet, and the concentrated water is discharged through the concentrated water outlet. That is, the pretreated raw water is divided into two paths after passing through the electric pressure reducing valve 103 and the booster pump 105. One path flows to the microbubble water assembly, and the other path flows to the membrane filter element 116. The membrane filter element 116 is used to filter the pretreated raw water again. After passing through the membrane filter element 116, the raw water is divided into pure water and concentrated water. The pure water is discharged through the pure water outlet and can be used by users as drinking water, while the concentrated water is discharged through the concentrated water outlet and can be directly discharged from the water purification system as wastewater.

[0056] Optionally, the pure water outlet of the membrane filter element 116 is connected to the pure water inlet 302 of the water purification system via a pipeline, on which a detection switch 117 is installed. The detection switch 117 can be a high-pressure switch, a low-pressure switch, or a Hall effect switch, etc. The high-pressure switch is used to prevent equipment damage or safety accidents caused by excessive pressure. The low-pressure switch is used to ensure a sufficient water supply and prevent the control pumps from running dry and being damaged. The Hall effect switch is used to measure the flow rate of the water passing through, thereby tracking the filter element's usage and predicting replacement time.

[0057] Optionally, the concentrate outlet of the membrane filter element 116 is connected to the concentrate outlet of the water purification system via a pipeline, on which a wastewater valve 118 is installed.

[0058] This embodiment provides a control method applicable to the aforementioned water purification system. The control method includes the following steps: receiving a target microbubble water flow rate L, and confirming a target gas flow rate Q within the optimal water-to-gas ratio M range; a flow meter 112 acquires the real-time microbubble water flow rate L1, and adjusts the flow regulating valve 110 based on the difference between the real-time microbubble water flow rate L1 and the target microbubble water flow rate L; a gas flow meter 107 acquires the real-time gas flow rate Q1, and adjusts the variable frequency air intake pump 106 based on the difference between the real-time gas flow rate Q1 and the target gas flow rate Q; a pressure sensor 104 acquires the real-time air intake pressure P1 between the electric pressure reducing valve 103 and the booster pump 105, and adjusts the electric pressure reducing valve 103 based on the difference between the real-time air intake pressure P1 and the preset target air intake pressure P.

[0059] In specific implementation, such as Figure 2As shown, for the water purification system, multiple target microbubble water flow rates L are pre-set, and the user can select a specific target microbubble water flow rate L. Flow meter 112 is used to detect the real-time microbubble water flow rate L1, and flow meter 112 is signal-connected to flow regulating valve 110. When the real-time microbubble water flow rate L1 is less than the target microbubble water flow rate L, the opening of flow regulating valve 110 is reduced, i.e., backflow is decreased, so that the real-time microbubble water flow rate L1 passing through flow meter 112 increases until the real-time microbubble water flow rate L1 meets the target microbubble water flow rate L. Conversely, when the real-time microbubble water flow rate L1 is greater than the target microbubble water flow rate L, the opening of flow regulating valve 110 is increased, i.e., backflow is increased, so that the real-time microbubble water flow rate L1 passing through flow meter 112 decreases until the real-time microbubble water flow rate L1 meets the target microbubble water flow rate L.

[0060] In specific implementation, such as Figure 3 As shown, for the optimal water-to-air ratio M preset in the water purification system, the target air intake flow rate Q can be confirmed when the user selects a target microbubble water flow rate L. The gas flow meter 107 is used to detect the real-time air intake flow rate Q1, and is connected to the variable frequency air intake pump 106. When the real-time air intake flow rate Q1 is less than the target air intake flow rate Q, the power of the variable frequency air intake pump 106 is increased to increase the real-time air intake flow rate Q1 passing through the gas flow meter 107, until the real-time air intake flow rate Q1 meets the target air intake flow rate Q, that is, the actual water-to-air ratio M1 = real-time microbubble water flow rate L1 / real-time gas flow rate Q1, and M1 ∈ M. When the real-time intake flow rate Q1 is greater than the target intake flow rate Q, the power of the variable frequency intake pump 106 is reduced so that the real-time intake flow rate Q1 passing through the gas flow meter 107 is reduced until the real-time intake flow rate Q1 meets the target intake flow rate Q, that is, the actual water-gas ratio M1 = real-time microbubble water flow rate L1 / real-time gas flow rate Q1 and M1∈M.

[0061] Because changes in the return water flow upstream of the electric pressure reducing valve 103 and fluctuations in the tap water pressure cause changes in the real-time air intake pressure P1 between the electric pressure reducing valve 103 and the booster pump 105, the air intake pressure between the electric pressure reducing valve 103 and the booster pump 105 can be detected in real time by the pressure gauge 104. When the real-time air intake pressure P1 does not meet the target air intake pressure P, the opening of the electric pressure reducing valve 103 is adjusted to ensure that the real-time air intake pressure P1 is the appropriate air intake pressure. In addition, within the range of the target air intake pressure P, if it is necessary to further increase the real-time air intake flow rate Q1, the real-time air intake pressure P1 can be decreased, and if it is necessary to further decrease the real-time air intake flow rate Q1, the real-time air intake pressure P1 can be increased.

[0062] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water purification system, characterized in that, It includes an electric pressure reducing valve (103), a pressure sensor (104) and a booster pump (105) arranged sequentially along the water flow direction on the inlet pipe (201), wherein the electric pressure reducing valve (103) and the pressure sensor (104) are connected by a signal. The water purification system also includes a variable frequency air intake pump (106) and a gas flow meter (107) arranged sequentially along the air intake pipe (202) in the airflow direction. The variable frequency air intake pump (106) and the gas flow meter (107) are signal connected. The air intake pipe (202) is connected between the electric pressure reducing valve (103) and the booster pump (105). The water purification system also includes a flow regulating valve (110) installed on the return pipe (203), the first end (2031) of the return pipe (203) being connected to the downstream of the booster pump (105), and the second end (2032) of the return pipe (203) being connected to the upstream of the electric pressure reducing valve (103); The water purification system also includes a microbubble water assembly installed on a microbubble water pipeline (204), the microbubble water pipeline (204) being connected to the downstream of the booster pump (105), and the microbubble water assembly including a flow meter (112), the flow meter (112) being signal-connected to the flow regulating valve (110).

2. The water purification system according to claim 1, characterized in that, A degassing component (111) is provided on the return pipeline (203). The degassing component (111) is used to prevent gas downstream of the electric pressure reducing valve (103) from returning to the upstream of the electric pressure reducing valve (103) through the return pipeline (203).

3. The water purification system according to claim 1, characterized in that, The variable frequency air intake pump (106) is connected to the pressure sensor (104) via signal connection.

4. The water purification system according to claim 1, characterized in that, The intake pipe (202) is also provided with a first check valve (108), which is located downstream of the gas flow meter (107).

5. The water purification system according to claim 1, characterized in that, An inlet valve (102) is provided on the inlet pipe (201). The inlet valve (102) is located upstream of the electric pressure reducing valve (103). The second end (2032) is connected between the inlet valve (102) and the electric pressure reducing valve (103).

6. The water purification system according to claim 5, characterized in that, A pretreatment filter element (101) is also provided on the water inlet pipe (201), and the pretreatment filter element (101) is located upstream of the water inlet valve (102).

7. The water purification system according to claim 1, characterized in that, The microbubble water assembly also includes a mixing tank (113), which is located downstream of the flow meter (112) and is used to mix the gas and liquid entering the mixing tank (113).

8. The water purification system according to claim 1, characterized in that, The water purification system also includes a membrane filter element (116), which has an inlet, a pure water outlet and a concentrated water outlet. The inlet is connected to the downstream of the booster pump (105). After the raw water is filtered by the membrane filter element (116), it is divided into pure water and concentrated water. The pure water is discharged through the pure water outlet and the concentrated water is discharged through the concentrated water outlet.

9. The water purification system according to claim 1, characterized in that, The water-to-air ratio of microbubble water ranges from 20 to 100.

10. A control method, characterized in that, The control method, applied to the water purification system according to any one of claims 1 to 9, comprises the following steps: Receive the target microbubble water flow rate L and confirm the target gas flow rate Q within the optimal water-to-gas ratio range M. The flow meter (112) acquires the real-time microbubble water flow rate L1 and adjusts the flow regulating valve (110) based on the difference between the real-time microbubble water flow rate L1 and the target microbubble water flow rate L. The gas flow meter (107) acquires the real-time gas flow rate Q1 and adjusts the variable frequency intake pump (106) based on the difference between the real-time gas flow rate Q1 and the target gas flow rate Q. The pressure gauge (104) acquires the real-time intake pressure P1 between the electric pressure reducing valve (103) and the booster pump (105), and adjusts the electric pressure reducing valve (103) based on the difference between the real-time intake pressure P1 and the preset target intake pressure P.

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