Water purifier

Abstract

The utility model provides a water purifier. The water purifier comprises a water inlet, a first water outlet, a second water outlet and a water intake, the central filter element is provided with a raw water port, a concentrated water port and a purified water port, the raw water port is connected to the water inlet through a raw water pipeline, and the concentrated water port is connected to the first drainage port through a first concentrated water pipeline and connected to the second drainage port through a second concentrated water pipeline; the water purifying opening is connected to the water taking opening through a water purifying pipeline; the conveying control assembly is arranged on the raw water pipeline and used for controlling water conveying and water stopping of the raw water pipeline. The waste water ratio valve is arranged on the first concentrated water pipeline in series, and the flushing control assembly can be manually operated to control opening / closing of the second water outlet. Therefore, the flushing function of the water purifier can be realized under the condition that a concentrated water electromagnetic valve with relatively high cost does not need to be arranged. The conveying control assembly is started during flushing through manual operation, so that a control circuit of the water purifier is simplified, and the cost is further reduced.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a water purifier. Background Technology

[0002] With the development of the times, people have increasingly higher requirements for drinking water quality, and water purifiers have been recognized and purchased by most people. Water purifiers can purify tap water or water in a water tank to provide users with high-quality clean water. Water purifiers on the market can include built-in water purifiers, under-sink water purifiers, and countertop water purifiers.

[0003] Currently, most water purifiers on the market use reverse osmosis filters or nanofiltration filters. These filters have good filtration effects and can provide users with high-quality purified water. However, water purifiers using these two types of filters also produce a certain proportion of concentrated water while producing purified water. This concentrated water contains a large amount of salt and may also contain a significant amount of heavy metal ions and residual chlorine. Therefore, after prolonged use, some water purifiers will accumulate a large amount of impurities on the surface of the filter, affecting the water purification effect and the lifespan of the filter.

[0004] Currently, to reduce the manufacturing cost of water purifiers, some commercially available water purifiers use basic wastewater ratio valves. These valves only allow concentrated water to drain slowly, leading to a large amount of impurities accumulating on the filter cartridge over time. Therefore, there is a need for a water purifier that can flush the filter cartridge at a lower cost to extend its lifespan. Utility Model Content

[0005] To at least partially address the problems existing in the prior art, some embodiments of this utility model provide a water purifier, including: a water inlet, a first drain outlet, a second drain outlet, and a water intake outlet; a central filter element having a raw water inlet, a concentrated water inlet, and a purified water inlet, the raw water inlet being connected to the water inlet via a raw water pipeline, the concentrated water inlet being connected to the first drain outlet via a first concentrated water pipeline and to the second drain outlet via a second concentrated water pipeline, and the purified water inlet being connected to the water intake outlet via a purified water pipeline; a delivery control component, disposed on the raw water pipeline, for controlling the water supply and shut-off of the raw water pipeline; a wastewater ratio valve, connected in series on the first concentrated water pipeline; and a flushing control component, which can be manually operated to control the opening / closing of the second drain outlet. Thus, by using a low-cost flushing control component, such as a ball valve or a plug, the flushing function of the water purifier can be achieved without the need for a more expensive concentrated water solenoid valve. Manually activating the delivery control component during flushing simplifies the control circuit of the water purifier, further reducing costs.

[0006] For example, the water purifier also includes a housing, with a wastewater ratio valve encapsulated within the housing, wherein the flushing control component is disposed outside the housing. Encapsulating the wastewater ratio valve within the housing prevents user misoperation, such as preventing the user from disassembling the wastewater ratio valve during flushing, which could lead to leakage, or from mistakenly adjusting the wastewater ratio, which could cause the water purifier to malfunction. At least a portion of the flushing control component, such as the operating handle of a ball valve, may protrude outside the housing, allowing the user to easily operate the flushing control component.

[0007] For example, a mounting cavity is provided inside the housing, and a movable door is connected to the opening of the mounting cavity. The flushing control component is located inside the mounting cavity. As a result, the flushing control component is not visible on the surface of the water purifier, which not only makes the appearance more concise but also prevents accidental activation by children.

[0008] For example, the flushing control assembly includes a ball valve, the inlet of which is connected to a second drain outlet, and the outlet of which is connected to a drain pipe. During flushing, the ball valve can be operated without disconnecting the pipes by plugging and unplugging, preventing loosening and leakage even after prolonged use. Optionally, the drain pipe connected to the outlet of the ball valve can be connected to a first drain outlet, allowing the water purifier to be connected to the sewer via the same drain pipe.

[0009] For example, the flushing control assembly includes a seal that is detachably connected to the second drain outlet. The use of a seal can further reduce the cost of the water purifier.

[0010] For example, a check valve and a pressure detector are connected in series along the water flow direction on the water purification pipeline. The delivery control component controls the supply of water from the raw water pipeline when the pressure detector detects that the pressure in the purified water pipeline is lower than a preset pressure. When the faucet is turned on and the purified water pipeline is connected to the outside, the water pressure in the purified water pipeline decreases, and the water purifier can control the supply of water from the raw water pipeline, thus providing purified water to the user. Optionally, the pressure detector may also include a high-pressure switch. When the pressure in the purified water pipeline decreases, the high-pressure switch can connect the power supply to the delivery control component; when the pressure in the purified water pipeline exceeds the set pressure, the high-pressure switch can disconnect the power supply to the delivery control component, thereby eliminating the need for a controller and reducing the cost of the water purifier.

[0011] For example, the delivery control component includes an inlet solenoid valve and a booster pump, both of which are activated when the second drain outlet is open. The inlet solenoid valve can shut off the raw water pipeline to prevent tap water from leaking from the wastewater valve when the user is not using water. When the second drain outlet is open, the inlet solenoid valve and booster pump can be manually activated at least to allow a larger flow of raw water to pass through the central filter element and flush it.

[0012] For example, the water purification unit also includes a flushing detection component for detecting user flushing operations. A delivery control component is electrically connected to the flushing detection component and controls the supply of water to the raw water pipeline when the flushing detection component detects a flushing operation. In summary, the flushing detection component can control the supply of water to the raw water pipeline based on user manual operation, thereby flushing the central filter cartridge.

[0013] For example, the flushing detection component includes an input component for determining that a flushing operation has been detected based on user input. Thus, the user does not turn on the faucet during a flushing operation; instead, they control the delivery control component via a separate input component, preventing leaks caused by forgetting to turn off the faucet after flushing.

[0014] For example, the flushing detection component includes an in-situ detector, which determines that a flushing operation has been detected when the flushing control component opens the second drain outlet. This allows for automatic control of the water delivery control component after the user operates the flushing control component, thus simplifying the user's operation.

[0015] For example, the presence detector includes a proximity switch and / or a contact switch located at the second drain outlet. This eliminates the need for additional input components such as a flushing switch on the water purifier, simplifying operation.

[0016] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0017] The advantages and features of this utility model will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the drawings,

[0019] Figure 1 This is a water circuit diagram of a water purifier according to a first exemplary embodiment of the present invention;

[0020] Figure 2 This is a water circuit diagram of a water purifier according to a second exemplary embodiment of the present invention;

[0021] Figure 3 This is a water circuit diagram of a water purifier according to a third exemplary embodiment of the present invention.

[0022] The above figures include the following reference numerals:

[0023] 10. Water inlet; 20. First drain outlet; 30. Second drain outlet; 40. Water intake; 50. Faucet; 100. Central filter element; 101. Raw water inlet; 102. Concentrate inlet; 103. Clean water inlet; 210. Raw water pipeline; 211. Pre-filter element; 220. First concentrate pipeline; 230. Second concentrate pipeline; 240. Clean water pipeline; 241. Check valve; 242. Pressure detector; 300. Delivery control assembly; 310. Inlet solenoid valve; 320. Booster pump; 400. Wastewater ratio valve; 500. Flushing control assembly; 510. Ball valve; 520. Seal; 600. Flushing detection assembly; 610. On-site detector. Detailed Implementation

[0024] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0025] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0026] This utility model provides a water purifier. The water purifier according to an embodiment of this utility model will be described in detail below with reference to the accompanying drawings. Figure 1As shown, the water purifier includes an inlet 10, a first drain outlet 20, a second drain outlet 30, and a water intake outlet 40. The inlet 10 can be connected to a water source, such as municipal tap water. The water purifier may also include a central filter element 100, which, as mentioned above, may include a reverse osmosis filter element, a nanofiltration filter element, etc. The central filter element 100 has a raw water inlet 101, a concentrated water inlet 102, and a purified water inlet 103. The raw water inlet 101 can be connected to the inlet 10 via a raw water pipe 210. The concentrated water inlet 102 is connected to the first drain outlet 20 via a first concentrated water pipe 220 and to the second drain outlet 30 via a second concentrated water pipe 230. The purified water inlet 103 is connected to the water intake outlet 40 via a purified water pipe 240. The first drain outlet 20 can be connected to the outside environment to discharge the concentrated water produced by the central filter element 100. Specifically, for example, the drain outlet can be connected to a drain pipe, which can be connected to a sewer or a container for collecting the concentrated water. Users can reuse the concentrated water in the container for various purposes when needed. The collected concentrated water can be reused to conserve water. In some embodiments, the water purifier may also include a pre-filter 211, which can filter large particulate impurities in the water, thereby extending the service life of the central filter 100.

[0027] A wastewater ratio valve 400 may be installed on the first concentrate pipeline 220. Taking an exemplary embodiment of the wastewater ratio valve 400 as an example, the wastewater ratio valve 400 may include a valve core with a small orifice. Water entering the concentrate pipeline can flow out at a constant rate under the restriction of the valve core, so that the raw water in the central filter element 100 maintains a certain pressure. In this way, the purified water in the raw water reaches the purified water outlet 103 after passing through the central filter element 100, and the concentrated water reaches the concentrate outlet 102. In some embodiments, the wastewater ratio valve 400 can adjust the outflow rate, thereby changing the concentration ratio of the concentrate passing through. In short, the concentrate outlet 102 is always connected to the outside through the wastewater ratio valve 400. After water production is stopped, the raw water and concentrate accumulated in the central filter element 100 will be discharged through the wastewater ratio valve 400.

[0028] A delivery control component 300 can be installed on the raw water pipeline 210 to control the water supply and shut-off of the raw water pipeline 210. The central filter element 100 typically requires a certain pressure to operate. Figure 1 In the illustrated embodiment, the delivery control component 300 may include a booster pump 320, which pressurizes the raw water to meet the operating pressure of the central filter cartridge 100. In some embodiments, the booster pump 320 may have a shut-off function, meaning that when the water purifier's inlet 10 is connected to municipal tap water, raw water is only supplied to the central filter cartridge 100 when the booster pump 320 is operating. Figure 2In the illustrated embodiment, the delivery control component 300 may include an inlet solenoid valve 310. The inlet solenoid valve 310 can prevent water from flowing out of the water inlet 40 and the drain outlet under municipal tap water pressure when the water purifier is not working.

[0029] In some embodiments, the delivery control assembly 300 may include only the inlet solenoid valve 310 and exclude the booster pump 320. Although the central filter cartridge 100 can only output purified water at the rated flow rate under rated raw water pressure, this does not mean that purified water cannot be produced under pressures lower than the rated raw water pressure. Generally, the lower limit of municipal tap water pressure is considered to be 0.1 MPa, and the upper limit is no higher than 0.4 MPa. Taking a typical tap water pressure of 0.2-0.3 MPa as an example, this pressure is lower than the pressure that the booster pump 320 can provide (0.6-0.7 MPa). Therefore, under the action of tap water pressure, the central filter cartridge 100 can output purified water at a flow rate of approximately one-third of the rated flow rate. For the water purifiers of these embodiments, this flow rate is sufficient for usage requirements.

[0030] The water purifier may also include a flushing control assembly 500, which can be manually operated to control the opening and closing of the second drain port 30. After prolonged use, a large amount of salt and other impurities will accumulate on one side of the membrane bag of the central filter element 100, leading to a decrease in the filtration performance of the central filter element 100. Flushing with a large amount of raw water can remove these impurities from the surface of the membrane bag, extending the service life of the central filter element 100. During flushing, the low-pressure raw water can be quickly discharged through the second drain port 30, and the central filter element 100 produces almost no purified water during the flushing process. The flushing control assembly 500 may include a ball valve 510, a plug, and other structures. The ball valve 510 can be connected in series on the second concentrate pipeline 230 or installed at the second drain port 30. The plug can be installed at the second drain port 30 to isolate it from the outside environment. The plug can be fixed to the second drain port 30 by threads, screw clips, or other structures and will not fall off under the pressure of the booster pump 320. Optionally, the second drain outlet 30 can be a quick-connect coupling, into which the plug can be inserted to hold it in place. Alternatively, a portion of the plug can be inside the second drain outlet 30; under pressure, the plug can more securely block the outlet. Pushing the plug further into the outlet allows the second concentrate line 230 to connect to the outside via the drain outlet 30. In short, the opening and closing of the second drain outlet 30 can be controlled in various ways.

[0031] Therefore, by incorporating a low-cost flushing control component 500, such as a ball valve 510 or a plug, the flushing function of the water purifier can be achieved without the need for a more expensive concentrated water solenoid valve. Manually activating the delivery control component 300 during flushing simplifies the water purifier's control circuitry and further reduces costs.

[0032] Exemplarily, the water purifier also includes a housing, with the wastewater ratio valve 400 encapsulated within the housing, while the flushing control assembly 500 is disposed outside the housing. Optionally, before the water purifier leaves the factory, after the wastewater ratio valve 400 is installed into the housing and the piping is connected, a sealing test can be performed to ensure reliable piping connection. Optionally, the wastewater ratio valve 400 and the piping can be configured to be non-detachably connected. In some embodiments, the wastewater ratio valve 400 can be configured to be adjustable and adjusted to preset parameters before the water purifier leaves the factory. Encapsulating the wastewater ratio valve 400 within the housing prevents user misoperation, such as preventing the user from disassembling the wastewater ratio valve 400 during flushing operations, which could lead to leakage, or from misadjusting the wastewater ratio, which could cause the water purifier to malfunction. At least a portion of the flushing control assembly 500, such as the operating handle of the ball valve 510, can protrude outside the housing, allowing the user to easily operate the flushing control assembly 500. Of course, the ball valve 510 can also be completely disposed outside the housing.

[0033] For example, a mounting cavity may be provided inside the housing, and the opening of the mounting cavity is connected to a movable door. The flushing control assembly 500 is disposed inside the mounting cavity. As a result, the flushing control assembly 500 is not visible on the surface of the water purifier, which not only makes the appearance more concise but also prevents accidental contact by children.

[0034] For example, the flushing control assembly 500 includes a seal 520 detachably connected to the second drain outlet 30. The seal 520 can be of a structure such as the plug described above. Using the seal 520 can further reduce the cost of the water purifier.

[0035] For example, in an embodiment where the flushing control assembly 500 includes a ball valve 510, the inlet of the ball valve 510 can be connected to a second drain outlet 30, and the outlet of the ball valve 510 is connected to a drain pipe. While embodiments with a plug at the second drain outlet 30 are less expensive than those with a ball valve 510, frequent plug removal may increase the risk of leakage in the water purifier. In cases of improper user operation, such as removing the plug after activating the flushing mode or during water production, water may spray out unexpectedly, causing significant leakage. The plug may also be ejected due to pressure, resulting in loss or damage. For the second drain outlet 30 using a quick-connect fitting, prolonged exposure to water pressure may make the plug difficult to remove. The ball valve 510 allows users to pre-connect the drain pipe to the sewer during water purifier installation, preventing leakage even if the flushing sequence is incorrect. During flushing, the ball valve 510 eliminates the need to disconnect the pipe by plugging and unplugging, reducing the likelihood of loosening and leakage even after prolonged use. Optionally, the drain pipe connected to the outlet of the ball valve 510 can be connected to the first drain outlet 20, so that the water purifier can be connected to the sewer via the same drain pipe.

[0036] For example, a check valve 241 and a pressure detector 242 are connected in series along the water flow direction on the water purification pipeline 240. The delivery control component 300 controls the raw water pipeline 210 to supply water when the pressure detector 242 detects that the pressure in the water purification pipeline 240 is lower than a preset pressure. Optionally, the pressure detector 242 may include a pressure sensor with analog or digital signals. The water purifier may include a controller that determines whether the water purification pipeline 240 is connected to the outside world based on the signal from the pressure sensor. When the faucet 50 is opened, and the water purification pipeline 240 is connected to the outside world, the water pressure in the water purification pipeline 240 decreases, and the water purifier can control the raw water pipeline 210 to supply water, thus providing purified water to the user. Optionally, the pressure detector 242 may also include a high-pressure switch. When the pressure in the water purification pipeline 240 decreases, the high-pressure switch can connect the power supply to the delivery control component 300; when the pressure in the water purification pipeline 240 is higher than the set pressure, the high-pressure switch will disconnect the power supply to the delivery control component 300, thereby eliminating the need for a controller and reducing the cost of the water purifier.

[0037] For example, the delivery control component 300 may include an inlet solenoid valve 310 and a booster pump 320, both of which are open when the second drain outlet 30 is open. The booster pump 320 can increase the pressure of the raw water, making the raw water pressure reach the rated working pressure of the central filter element 100, resulting in a larger flow rate of purified water. The booster pump 320 may not have a shut-off function; if there is pressure at the inlet of the booster pump 320, the raw water may pass through the booster pump 320 and slowly flow out through the wastewater ratio valve 400. This would lead to a waste of water resources.

[0038] Exemplarily, the water purification assembly may further include a flushing detection assembly 600, which is used to detect a user's flushing operation. A delivery control assembly 300 is electrically connected to the flushing detection assembly 600, and is used to control the raw water pipeline 210 to supply water when the flushing detection assembly 600 detects a flushing operation. When the delivery control assembly 300 includes an inlet solenoid valve 310 and a booster pump 320, both can be controlled to open. When the delivery control assembly 300 only includes the inlet solenoid valve 310, only the inlet solenoid valve 310 can be controlled to open. Optionally, after detecting a user's flushing operation, the flushing detection assembly 600 can control the delivery control assembly 300 to operate within a preset time to prevent the booster pump 320 from running continuously without power if the user does not operate the flushing control assembly 500 to open the second drain outlet 30. Optionally, the flushing detection assembly 600 can directly connect the delivery control assembly 300 to power via a switch when detecting a user's flushing operation, such as pressing a switch. In summary, the flushing detection component 600 can control the water supply through the raw water pipeline 210 based on the user's manual operation, thereby flushing the central filter element 100.

[0039] Exemplarily, the flushing detection component 600 may include an input component for determining that a flushing operation has been detected based on user input. Optionally, the input component may include a flushing button located on the water purifier panel, which, when pressed by the user, controls the delivery control component 300 to operate. In embodiments where the water purifier includes other operating methods, such as remote control, the input component may also include a remote control. Thus, the user does not turn on the faucet 50 during the flushing operation, but instead controls the delivery control component 300 through a separate input component, preventing leakage caused by forgetting to turn off the faucet after flushing.

[0040] For example, the flush detection assembly 600 includes an in-situ detector 610, which determines that a flush operation has been detected when the flush control assembly 500 opens the second drain outlet 30. Optionally, the in-situ detector 610 can detect the position of the ball valve 510 or the plug, thereby automatically controlling the delivery control assembly 300 to supply water after the user operates the flush control assembly 500. This simplifies the user's operation.

[0041] For example, the presence detector 610 includes a proximity switch located at the second drain outlet 30. The proximity switch may include, but is not limited to, an eddy current proximity switch, an infrared photocell sensor, or a reflective infrared sensor. When the water purifier uses a seal 520, such as a plug, as the flushing control component 500, it can detect whether the seal 520 has been removed at low cost, thereby automatically controlling the water supply of the delivery control component 300. Optionally, the presence detector 610 may also include a contact switch. Optionally, the flushing detection component 600 can control the delivery control component 300 to shut off after a period of water supply, preventing continuous water flow from preventing the user from reinstalling the seal 520. Therefore, it is unnecessary to additionally install input components such as a flushing switch on the water purifier, and operation is simpler.

[0042] In the description of this utility model, it should be understood that the directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" indicate the orientation or positional relationship, which are usually based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0043] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0046] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water purifier, characterized in that, include: Water inlet, first drain outlet, second drain outlet, and water intake outlet; The central filter element has a raw water inlet, a concentrated water inlet, and a purified water inlet. The raw water inlet is connected to the inlet via a raw water pipeline. The concentrated water inlet is connected to the first outlet via a first concentrated water pipeline and to the second outlet via a second concentrated water pipeline. The purified water inlet is connected to the water outlet via a purified water pipeline. A delivery control component is installed on the raw water pipeline and is used to control the water supply and cut-off of the raw water pipeline; Wastewater ratio valve, wherein the wastewater ratio valve is connected in series on the first concentrate pipeline; as well as A flushing control assembly, which can be manually operated to control the opening / closing of the second drain outlet.

2. The water purifier according to claim 1, characterized in that, The water purifier also includes a housing, and the wastewater ratio valve is encapsulated within the housing, wherein: The flushing control assembly is located outside the housing; or The housing has an installation cavity, the opening of which is connected to a movable door, and the flushing control assembly is located inside the installation cavity.

3. The water purifier according to claim 1, characterized in that, The flushing control assembly includes a ball valve, the inlet of which is connected to the second drain outlet, and the outlet of which is connected to a drain pipe.

4. The water purifier according to claim 1, characterized in that, The flushing control assembly includes a seal that is detachably connected to the second drain outlet.

5. The water purifier according to claim 1, characterized in that, A check valve and a pressure detector are connected in series along the water flow direction on the purified water pipeline. When the pressure detector detects that the pressure in the purified water pipeline is lower than the preset pressure, the delivery control component controls the raw water pipeline to deliver water.

6. The water purifier according to claim 1, characterized in that, The delivery control component includes an inlet solenoid valve and a booster pump, both of which are activated when the second drain outlet is open.

7. The water purifier according to claim 1, characterized in that, The water purification assembly also includes a flushing detection component, which is used to detect the user's flushing operation. The delivery control component is electrically connected to the flushing detection component, and the delivery control component is used to control the water delivery of the raw water pipeline when the flushing detection component detects the flushing operation.

8. The water purifier according to claim 7, characterized in that, The flushing detection component includes an input component, which is used to determine that the flushing operation has been detected based on user input.

9. The water purifier according to claim 7, characterized in that, The flushing detection component includes an in-situ detector, which is used to determine that the flushing operation has been detected when the flushing control component opens the second drain outlet.

10. The water purifier according to claim 9, characterized in that, The in-situ detector includes a proximity switch and / or a contact switch disposed at the second drain outlet.

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