CN109019909B - Water purifier - Google Patents

Abstract

The invention provides a water purifier, which comprises a booster pump and a precise filter element positioned at the downstream position of the booster pump, wherein the booster pump is a power-adjustable booster pump, and the water purifier further comprises: the controller is connected with the booster pump, and according to the repeated start-stop frequency of the water purifier, the controller adjusts the working power of the booster pump, and when the water purifier is repeatedly started and stopped in a preset unit time t ₁, the controller reduces the working power of the booster pump so as to reduce the water flow passing through the precise filter element. The invention solves the problem of poor user experience caused by frequent start and stop of the water purifier in the prior art.

Description

Water purifier

Technical Field

The present invention relates to the technical field of household appliances, and in particular to a water purifier.

Background technique

With regard to the water purifier in the prior art, after the user uses purified water at a flow rate less than the rated flow rate, the water tank is no longer full of water because the purified water in the water tank is used. In order to keep the purified water in the water tank full of water, the water purifier is prone to frequently start the water purification. In this way, the water purifier is always switching between the water production working state and the shutdown state, causing the booster pump to start and stop continuously. On the one hand, the working noise of the water purifier is increased, resulting in a poor user experience, and on the other hand, the service life of the booster pump is reduced.

Summary of the invention

The main purpose of the present invention is to provide a water purifier to solve the problem in the prior art that the water purifier is frequently started and stopped, resulting in a poor user experience.

In order to achieve the above-mentioned purpose, the present invention provides a water purifier, including a booster pump and a precision filter element located downstream of the booster pump, the booster pump is a power-adjustable booster pump, the water purifier also includes: a controller, the booster pump is connected to the controller, according to the repeated start and stop frequency of the water purifier, the controller adjusts the working power of the booster pump, when the water purifier is repeatedly started and stopped within a preset unit time _t1 , the controller reduces the working power of the booster pump to reduce the water flow through the precision filter element.

Furthermore, the water purifier also includes a power adjustment key, which is connected to the controller to adjust the working power of the boost pump.

Furthermore, the boost pump has two gears, and by repeatedly pressing the power adjustment key, the boost pump switches between a low gear and a high gear.

Furthermore, the water purifier also includes a high-pressure switch arranged at a downstream position of the precision filter element, and a water inlet solenoid valve is arranged at an upstream position of the booster pump along the water flow direction. The high-pressure switch is connected to the controller as a full water detection unit, and the water inlet solenoid valve is connected to the controller. When the water pressure in the water purifier increases to the point where the high-pressure switch is disconnected, the water purifier is in a full water state, the controller receives the full water signal sent by the high-pressure switch and controls the water inlet solenoid valve to close and the booster pump to stop working, and the water purifier stops making water and is in a shutdown state; when the water pressure in the water purifier decreases to the point where the high-pressure switch is opened, the water purifier is in a water shortage state, the controller receives the water making signal sent by the high-pressure switch and controls the water inlet solenoid valve to open and the booster pump to start working, and the water purifier starts making water and is in a start-up state; wherein, when the controller repeatedly receives the full water signal and the water making signal within a preset unit time _t1 , the controller reduces the working power of the booster pump, and when the controller does not receive the full water signal or the water making signal within the preset unit time _t1 , the controller increases the working power of the booster pump.

Furthermore, the preset unit time _t1 is less than or equal to 5 seconds.

Furthermore, the preset unit time _t1 is less than or equal to 2 seconds.

Furthermore, the water purifier also includes a high-pressure switch arranged at a downstream position of the precision filter element, and a water inlet solenoid valve is arranged at an upstream position of the booster pump along the flow direction of water. The high-pressure switch is connected to the controller as a full water detection unit, and the water inlet solenoid valve is connected to the controller. When the water pressure in the water purifier increases to disconnect the high-pressure switch, the water purifier is in a full water state, the controller receives the full water signal sent by the high-pressure switch and controls the water inlet solenoid valve to close and the booster pump to stop working, and the water purifier stops making water and is in a shutdown state; when the water pressure in the water purifier decreases to open the high-pressure switch, the water purifier is in a water shortage state, the controller receives the water making signal sent by the high-pressure switch and controls the water inlet solenoid valve to open and the booster pump to start working, and the water purifier starts making water and is in a start-up state; wherein, when the controller repeatedly receives the full water signal and the water making signal within the preset unit time _t1 , the controller reduces the working power of the booster pump, and when the time difference between the water making signal and the full water signal received by the controller is greater than the first preset stable time _t2 , the controller increases the working power of the booster pump.

Furthermore, the first preset stabilization time _t2 is greater than 20 seconds.

Furthermore, the water purifier also includes a high-pressure switch arranged at a downstream position of the precision filter element, and a water inlet solenoid valve is arranged at an upstream position of the booster pump along the water flow direction. The high-pressure switch is connected to the controller as a full water detection unit, and the water inlet solenoid valve is connected to the controller. When the water pressure in the water purifier increases to disconnect the high-pressure switch, the water purifier is in a full water state, the controller receives the full water signal sent by the high-pressure switch and controls the water inlet solenoid valve to close and the booster pump to stop working, and the water purifier stops making water and is in a shutdown state; when the water pressure in the water purifier decreases to open the high-pressure switch, the water purifier is in a water shortage state, the controller receives the water making signal sent by the high-pressure switch and controls the water inlet solenoid valve to open and the booster pump to start working, and the water purifier starts making water and is in a start-up state; wherein, when the controller repeatedly receives the full water signal and the water making signal within the preset unit time _t1 , the controller reduces the working power of the booster pump, and when the controller does not receive a new water making signal within the second preset stable time _t3 after receiving the full water signal, the controller increases the working power of the booster pump.

Furthermore, the second preset stabilization time _t3 is greater than 20 seconds.

Furthermore, the water purifier also includes two pre-treatment filter elements, and a water inlet solenoid valve is arranged between the two pre-treatment filter elements.

By applying the technical solution of the present invention, if the water purifier causes the booster pump to start and stop repeatedly within the preset unit time _t1 , the controller will reduce the working power of the booster pump, reduce the outlet pressure of the booster pump, reduce the water flow and water pressure flowing through the precision filter element, thereby reducing the starting frequency of the booster pump and reducing the working noise of the booster pump. In this way, the water purifier not only reduces the working noise of the water purifier (the working noise of the booster pump) within a certain period of time, improves the user experience, but also extends the service life of the booster pump.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 shows a process diagram of water treatment according to Embodiment 1 of a water purifier of the present invention; and

FIG. 2 is a schematic diagram showing the electrical connection relationship between the controller in FIG. 1 and other components.

The above drawings include the following reference numerals:

10. Booster pump; 20. Precision filter element; 30. High-pressure switch; 50. Controller; 61. Pre-treatment filter element; 70. Water inlet solenoid valve; 80. Post-activated carbon; 90. Check valve; 100. Wastewater ratio; 110. Power adapter.

Detailed ways

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

Embodiment 1

As shown in Figures 1 and 2, the water purifier in the first embodiment includes a pre-treatment filter element 61, a booster pump 10, a precision filter element 20 and a high-pressure switch 30 connected in sequence along the flow direction of water, wherein the booster pump 10 is a booster pump 10 with adjustable power, and the water purifier also includes a controller 50. The booster pump 10 is connected to the controller 50, and the controller 50 adjusts the working power of the booster pump 10 according to the repeated start and stop frequency of the water purifier. When the water purifier is repeatedly started and stopped within a preset unit time _t1 , the controller 50 reduces the working power of the booster pump 10 to reduce the water flow through the precision filter element 20.

By applying the technical solution of Example 1, the water in the water purifier flows through the pre-treatment filter element 61, the booster pump 10, the precision filter element 20 and the high-pressure switch 30 in sequence, and finally flows to the water outlet joint of the user, so that the water purifier completes the water purification operation.

When the water purifier is performing water making operation, the high-pressure switch 30 is in the open state, and the booster pump 10 performs water boosting operation. At this time, the water pressure at the high-pressure switch is less than the outlet pressure of the booster pump 10. After the outlet pressure of the booster pump 10 is balanced with the water pressure at the high-pressure switch, the high-pressure switch is disconnected and the booster pump 10 stops working. Then the water purifier completes the water making operation and switches from the water making state to the full water state.

If the water purifier causes the booster pump 10 to start and stop repeatedly within the preset unit time _t1 , the controller 50 reduces the working power of the booster pump 10, reduces the outlet pressure of the booster pump 10, reduces the water flow and water pressure flowing through the precision filter element 20, thereby reducing the starting frequency of the booster pump 10 and reducing the working noise of the booster pump 10. In this way, the water purifier in the first embodiment not only reduces the working noise of the water purifier (the working noise of the booster pump 10) within a certain period of time, improves the user experience, but also prolongs the service life of the booster pump 10.

Optionally, the precision filter element 20 is a nanofiltration filter element or a reverse osmosis membrane filter element.

As shown in FIG. 2 , in the water purifier of the first embodiment, a water inlet solenoid valve 70 is provided at the upstream position of the booster pump 10 along the flow direction of water, and the high-pressure switch 30 is connected to the controller 50 as a full water detection unit, and the water inlet solenoid valve 70 is connected to the controller 50. When the water pressure in the water purifier increases to disconnect the high-pressure switch 30, the water purifier is in a full water state, the controller 50 receives the full water signal sent by the high-pressure switch 30 and controls the water inlet solenoid valve 70 to close, the booster pump 10 to stop working, and the water purifier stops making water and is in a shutdown state; when the water pressure in the water purifier decreases to open the high-pressure switch 30, the water purifier is in a water shortage state, the controller 50 receives the water making signal sent by the high-pressure switch 30 and controls the water inlet solenoid valve 70 to open, the booster pump 10 starts working, and the water purifier starts making water and is in a start-up state; wherein, when the controller 50 repeatedly receives the full water signal and the water making signal within the preset unit time t ₁ , the controller 50 reduces the working power of the booster pump 10, and when the controller 50 is within the preset unit time t ₁ , the controller 50 increases the working power of the boost pump 10. Specifically, within the preset unit time _t1 , when the user frequently uses purified water at a flow rate less than the rated flow rate, the high-pressure switch 30 will open and close frequently, which causes the boost pump 10 and the water inlet solenoid valve 70 to open repeatedly. At this time, if the working power of the boost pump 10 is reduced, the amount of water per unit time in the water purifier is reduced, which is conducive to extending the water production time, that is, reducing the possibility of repeated opening and closing of the high-pressure switch 30. At this time, the controller 50 reduces the working power of the boost pump 10, the outlet pressure of the boost pump 10 is reduced, and the water flow and water pressure flowing through the precision filter element 20 are reduced, thereby reducing the starting frequency of the boost pump, reducing the working noise of the boost pump, and improving the user experience.

Within the preset unit time _t1 , if the water purifier is always in a full water state, the high pressure switch 30 is disconnected because the water pressure reaches the standard, and the controller 50 controls the booster pump 10 to stop working after receiving the full water signal sent by the high pressure switch 30. If the water purifier is in a water shortage state later, that is, the high pressure switch 30 is reopened due to the decrease in water pressure, the controller 50 starts the booster pump 10 for water production after receiving the water production signal sent by the high pressure switch 30, and restores the working power of the booster pump 10, that is, increases the working power of the booster pump 10.

Preferably, the preset unit time _t1 is less than or equal to 5 seconds. In the water purifier of embodiment 1, the preset unit time _t1 is less than or equal to 2 seconds. When the controller 50 repeatedly receives the full water signal and the water production signal within 2 seconds, the controller 50 reduces the working power of the boost pump 10. When the controller 50 does not receive the full water signal or the water production signal within 2 seconds, the controller 50 increases the working power of the boost pump 10. In this way, when the user frequently uses purified water at a flow rate less than the rated flow rate within 2 seconds or less, the controller 50 reduces the working power of the boost pump 10, thereby reducing the starting frequency of the boost pump, reducing the working noise of the boost pump, and improving the user experience. The above numerical settings improve the detection accuracy of the water purifier.

As shown in Figures 1 and 2, in the water purifier of Example 1, there are two pre-treatment filter elements 61, and the above-mentioned water inlet solenoid valve 70 is arranged between the two pre-treatment filter elements 61. When the water purifier is in a full water state, the controller 50 controls the water inlet solenoid valve 70 to close, the booster pump 10 to stop working, and the water purifier stops making water and is in a shutdown state; when the water purifier is in a water shortage state, the controller 50 controls the water inlet solenoid valve 70 to open, the booster pump 10 to start running, and the water purifier starts making water and is in a start-up state.

As shown in Fig. 1, in the water purifier of the first embodiment, the water purifier further includes a power adapter 110, and the power adapter 110 is connected to the controller 50 to supply power to the controller 50. Preferably, the controller 50 is a main control board.

As shown in Fig. 1, in the water purifier of the first embodiment, a one-way valve 90 is also provided on the pipeline connecting the precision filter element 20 and the post-activated carbon 80. Water can only flow from the precision filter element 20 into the post-activated carbon 80, and cannot flow in the reverse direction.

As shown in FIG. 1 , in the water purifier of the first embodiment, the water purifier further includes a waste water ratio 100, and the waste water ratio 100 is connected to the pipeline of the reflux port of the precision filter element 20, so as to improve the utilization rate of water.

In this embodiment, the power of the boost pump 10 can be adjusted through the linkage control of the controller 50 and the high-voltage switch 30 .

Embodiment 2

The water purifier in the second embodiment differs from that in the first embodiment in that the power of the booster pump is adjusted manually.

When adjusting the working power of the booster pump, it can be achieved through manual adjustment.

Specifically, the water purifier also includes a power adjustment key, which is connected to the controller to adjust the working power of the booster pump. Specifically, when the water purifier is repeatedly started and stopped within a preset unit time, the user can adjust the working power of the booster pump by operating the power adjustment key connected to the controller. The above structure makes it more convenient for the user to adjust the booster pump, thereby improving the user experience.

Optionally, the booster pump has two gears, and the booster pump switches between a low gear and a high gear by repeatedly pressing the power adjustment key. Specifically, when the water purifier starts and stops repeatedly within a preset unit time, the user manually presses the power adjustment key once to put the booster pump in a low gear, which can reduce the working power of the booster pump, reduce the outlet pressure of the booster pump, and thus reduce the water flow rate, reduce the starting frequency of the booster pump, and improve the user experience. The user presses the power adjustment key again to put the booster pump in a high gear, which can restore the working power of the booster pump, restore the outlet pressure of the booster pump, and thus increase the water flow rate.

Embodiment 3

The water purifier in the third embodiment is different from that in the first embodiment in that the control method of the water purifier is different.

The water purifier in the third embodiment includes a pre-treatment filter element, a booster pump, a precision filter element and a high-pressure switch connected in sequence along the flow direction of water, wherein the booster pump is a booster pump with adjustable power, and the water purifier also includes a controller. The booster pump is connected to the controller, and the controller adjusts the working power of the booster pump according to the repeated start and stop frequency of the water purifier. When the water purifier is repeatedly started and stopped within a preset unit time _t1 , the controller reduces the working power of the booster pump to reduce the water flow through the precision filter element.

In the water purifier of the third embodiment, a water inlet solenoid valve is provided at an upstream position of the booster pump along the flow direction of water, the high-pressure switch is connected to the controller as a full water detection unit, and the water inlet solenoid valve is connected to the controller. When the water pressure in the water purifier increases to disconnect the high-pressure switch, the water purifier is in a full water state, the controller receives the full water signal sent by the high-pressure switch and controls the water inlet solenoid valve to close, the booster pump to stop working, and the water purifier stops making water and is in a shutdown state; when the water pressure in the water purifier decreases to open the high-pressure switch, the water purifier is in a water shortage state, the controller receives the water making signal sent by the high-pressure switch and controls the water inlet solenoid valve to open, the booster pump to start working, and the water purifier starts making water and is in a start-up state; wherein, when the controller repeatedly receives the full water signal and the water making signal within the preset unit time _t1 , the controller reduces the working power of the booster pump, and when the time difference between the water making signal and the full water signal received by the controller is greater than the first preset stable time _t2 , the controller increases the working power of the booster pump.

Specifically, within the preset unit time _t1 , when the user frequently uses purified water at a flow rate less than the rated flow rate, the high-pressure switch will open and close frequently, which causes the booster pump and the water inlet solenoid valve to open repeatedly. At this time, if the working power of the booster pump is reduced, the amount of water per unit time in the water purifier will be reduced, which is conducive to extending the water production time, that is, reducing the possibility of repeated opening and closing of the high-pressure switch. At this time, the controller reduces the working power of the booster pump, and the outlet pressure of the booster pump is reduced, reducing the water flow and water pressure flowing through the precision filter element, thereby reducing the starting frequency of the booster pump, reducing the working noise of the booster pump, and improving the user experience.

When the time difference between the water production signal and the full water signal received by the controller is greater than the first preset stabilization time _t2 , that is, the user does not frequently use purified water at a flow rate less than the rated flow rate, the controller restores the working power of the booster pump, that is, increases the working power of the booster pump.

In the water purifier of the third embodiment, the first preset stabilization time _t2 is greater than 20 seconds. In order to improve the detection accuracy, it is necessary to set a suitable first preset stabilization time _t2 , that is, greater than 20 seconds.

Embodiment 4

The water purifier in the fourth embodiment is different from that in the first embodiment in that the control method of the water purifier is different.

The water purifier in the fourth embodiment includes a pre-treatment filter element, a booster pump, a precision filter element and a high-pressure switch connected in sequence along the flow direction of water, wherein the booster pump is a booster pump with adjustable power, and the water purifier also includes a controller. The booster pump is connected to the controller, and the controller adjusts the working power of the booster pump according to the repeated start and stop frequency of the water purifier. When the water purifier is repeatedly started and stopped within a preset unit time _t1 , the controller reduces the working power of the booster pump to reduce the water flow through the precision filter element.

In the water purifier of the third embodiment, a water inlet solenoid valve is provided at the upstream position of the booster pump along the flow direction of water, the high-pressure switch is connected to the controller as a full water detection unit, and the water inlet solenoid valve is connected to the controller. When the water pressure in the water purifier increases to disconnect the high-pressure switch, the water purifier is in a full water state, the controller receives the full water signal sent by the high-pressure switch and controls the water inlet solenoid valve to close, the booster pump to stop working, and the water purifier stops making water and is in a shutdown state; when the water pressure in the water purifier decreases to open the high-pressure switch, the water purifier is in a water shortage state, the controller receives the water making signal sent by the high-pressure switch and controls the water inlet solenoid valve to open, the booster pump to start working, and the water purifier starts making water and is in a start-up state; wherein, when the controller repeatedly receives the full water signal and the water making signal within the preset unit time _t1 , the controller reduces the working power of the booster pump, and when the controller does not receive a new water making signal within the second preset stable time _t3 after receiving the full water signal, the controller increases the working power of the booster pump.

Specifically, within the preset unit time _t1 , when the user frequently uses purified water at a flow rate less than the rated flow rate, the high-pressure switch will open and close frequently, which causes the booster pump and the water inlet solenoid valve to open repeatedly. At this time, if the working power of the booster pump is reduced, the amount of water per unit time in the water purifier will be reduced, which is conducive to extending the water production time, that is, reducing the possibility of repeated opening and closing of the high-pressure switch. At this time, the controller reduces the working power of the booster pump, and the outlet pressure of the booster pump is reduced, reducing the water flow and water pressure flowing through the precision filter element, thereby reducing the starting frequency of the booster pump, reducing the working noise of the booster pump, and improving the user experience.

When the controller does not receive a new water-making signal within the second preset stable time _t3 after receiving the full water signal, it means that the water purifier has been in a full water state within the second preset stable time _t3 , and the user has not used purified water. The controller then restores the working power of the boost pump, that is, increases the working power of the boost pump.

In the water purifier of the fourth embodiment, the second preset stabilization time _t3 is greater than 20 seconds. In order to improve the detection accuracy of the controller, it is necessary to set a suitable second preset stabilization time _t3 , that is, greater than 20 seconds.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

In the present application, the water in the water purifier flows through the pre-treatment filter element 61, the booster pump 10, the precision filter element 20 and the high-pressure switch 30 in sequence, and finally flows to the user end, so that the water purifier completes the water purification operation.

When the water purifier is performing water making operation, the high-pressure switch 30 is in the open state, and the booster pump 10 performs water boosting operation. At this time, the water pressure at the high-pressure switch 30 is less than the outlet pressure of the booster pump 10. After the outlet pressure of the booster pump 10 is balanced with the water pressure at the high-pressure switch 30, the high-pressure switch 30 is disconnected and the booster pump 10 stops working. Then the water purifier completes the water making operation and switches from the water making state to the full water state.

If the water purifier causes the booster pump 10 to start and stop repeatedly within the preset unit time _t1 , the controller 50 adjusts the working power of the booster pump 10 to reduce the outlet pressure of the booster pump 10, and reduces the water flow and water pressure flowing through the precision filter element 20, thereby reducing the starting frequency of the booster pump 10 and reducing the working noise of the booster pump 10. In this way, the water purifier not only reduces the working noise of the water purifier (the working noise of the booster pump 10) within a certain period of time, improves the user experience, but also prolongs the service life of the booster pump 10.

Obviously, the embodiments described above are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and/or combinations thereof.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A water purifier, characterized in that it comprises a pre-treatment filter element (61), a booster pump (10), and a precision filter element (20) connected in sequence along the flow direction of water, wherein the booster pump (10) is a booster pump (10) with adjustable power, and the water purifier further comprises: a controller (50), the booster pump (10) being connected to the controller (50), and the controller (50) adjusting the working power of the booster pump (10) according to the repeated start and stop frequency of the water purifier; when the water purifier is repeatedly started and stopped within a preset unit time _t1 , the controller (50) reduces the working power of the booster pump (10) to reduce the water flow rate passing through the precision filter element (20); The water purifier further comprises a high-pressure switch (30) arranged at a downstream position of the precision filter element (20); and a water inlet solenoid valve (70) is arranged at an upstream position of the booster pump (10) along the flow direction of water; the high-pressure switch (30) is connected to the controller (50) as a full water detection unit, and the water inlet solenoid valve (70) is connected to the controller (50) so as to adjust the power of the booster pump (10) through the linkage control of the controller (50) and the high-pressure switch (30); When the water pressure in the water purifier increases to the point where the high-pressure switch (30) is disconnected, the water purifier is in a full water state, the controller (50) receives the full water signal sent by the high-pressure switch (30) and controls the water inlet solenoid valve (70) to close and the booster pump (10) to stop working, and the water purifier stops producing water and is in a shutdown state; When the water pressure in the water purifier is reduced to the point where the high-pressure switch (30) is turned on, the water purifier is in a water shortage state, the controller (50) receives the water production signal sent by the high-pressure switch (30) and controls the water inlet solenoid valve (70) to open and the booster pump (10) to start working, and the water purifier starts to produce water and is in a start-up state; wherein, when the controller (50) repeatedly receives the full water signal and the water production signal multiple times within the preset unit time _t1 , the controller (50) reduces the working power of the booster pump (10); The preset unit time _t1 is less than or equal to 5 seconds. 2. The water purifier according to claim 1 is characterized in that the water purifier also includes a power adjustment key, and the power adjustment key is connected to the controller (50) to adjust the working power of the boost pump (10). 3. The water purifier according to claim 2 is characterized in that the booster pump (10) has two gears, and by repeatedly pressing the power adjustment key, the booster pump (10) switches between a low gear and a high gear. 4. The water purifier according to claim 1 is characterized in that when the controller (50) does not receive the full water signal or the water production signal within the preset unit time _t1 , the controller (50) increases the working power of the boost pump (10). 5. The water purifier according to claim 1, characterized in that the preset unit time _t1 is less than or equal to 2 seconds. 6. The water purifier according to claim 1 is characterized in that when the time difference between the water production signal and the full water signal received by the controller (50) is greater than a first preset stabilization time _t2 , the controller (50) increases the working power of the boost pump (10). 7. The water purifier according to claim 6, characterized in that the first preset stabilization time _t2 is greater than 20 seconds. 8. The water purifier according to claim 1 is characterized in that when the controller (50) does not receive a new water production signal within a second preset stabilization time _t3 after receiving the full water signal, the controller (50) increases the working power of the boost pump (10). 9 . The water purifier according to claim 8 , wherein the second preset stabilization time t ₃ is greater than 20 seconds. 10. The water purifier according to any one of claims 4 to 9, characterized in that there are two pre-treatment filter elements (61), and the water inlet solenoid valve (70) is arranged between the two pre-treatment filter elements (61).