Water purifier

Abstract

The application provides a water purifier. The water purifier has a total water inlet and a water outlet, comprising: a water inlet channel, a water inlet of which is connected to the total water inlet; a first filtering device, a raw water inlet of which is connected to a water outlet of the water inlet channel; a first water outlet channel, a clean water outlet of the first filtering device being connected to a water inlet of the first water outlet channel, a water outlet control valve being arranged on the first water outlet channel, the water outlet control valve separating the first water outlet channel into an enclosed section upstream and an air communication section downstream which is connected to air through a water outlet of the first water outlet channel; a water outlet channel, a water inlet of which is connected to the air communication section; a pumping device, a water outlet of the water outlet channel being connected to a water inlet of the pumping device, a water outlet of the pumping device being connected to the water outlet, the water outlet control valve being configured to cut off the first water outlet channel in response to a user's operation of stopping taking clean water, the pumping device being configured to operate for a first predetermined time length according to a signal of stopping taking clean water. No residual water can be achieved in the air communication section, and there is no contaminated water.

Description

Technical Field

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

[0002] Water purifiers play a crucial role in determining whether tap water meets standards or is of "high quality." Even if tap water has reached "high quality" after treatment at the water plant, its quality may subtly change during its transport from the plant to the home, due to factors such as pipe contamination. Therefore, water purifiers have essentially become indispensable household items, and their popularity is expected to continue to grow.

[0003] However, water purifiers have a section of their water path that connects to the air through the faucet outlet. After the purifier has been idle for an extended period, the residual purified water in this section, exposed to air, can breed bacteria and become contaminated. When the user takes their next water sample, this contaminated water will be provided. Therefore, the first glass of water the user drinks will still contain substandard water. As people become increasingly concerned about water quality, modern water purifiers employ technologies such as pure water bubble membrane technology and recirculation technology to ensure that every glass of water the user drinks (especially the first glass) meets the required quality standards.

[0004] However, it was found that even with the above technologies, the water quality of the first cup of water was still substandard, resulting in a poor user experience. Utility Model Content

[0005] To at least partially address the problems existing in the prior art, this utility model provides a water purifier. The water purifier has a main inlet and a drain outlet, and includes: an inlet water path, the inlet of which is connected to the main inlet; a first filter device, the raw water outlet of which is connected to the outlet of the inlet water path; a first outlet water path, the purified water outlet of which is connected to the inlet of the first outlet water path, the first outlet water path being equipped with an outlet control valve that divides the first outlet water path into an upstream closed section and a downstream air-connected section that communicates with air via the outlet of the first outlet water path; a drain water path, the inlet of which is connected to the air-connected section; and a pumping device, the outlet of which is connected to the inlet of the pumping device, and the outlet of the pumping device being connected to the drain outlet, wherein: the outlet control valve is configured to cut off the first outlet water path in response to a user's cessation of purified water intake, and the pumping device is configured to operate for a first predetermined duration based on a cessation of purified water intake electrical signal.

[0006] In the water purifier provided in this embodiment, after the user has finished collecting purified water, since the air connection section of the first water outlet path no longer receives purified water, and the pumping device runs for a predetermined period of time, any residual water in the air connection section of the first water outlet path can be pumped out by the pumping device and discharged outside the water purifier through the drain outlet. Thus, there is no residual water in the air connection section of the first water outlet path, and therefore no contaminated water exists. When the water purifier provides purified water again, the vast majority of the purified water flowing from the outlet of the first water outlet path is freshly produced by the first filtration device, with only a small portion remaining in the original water path, such as in the closed section of the first water outlet path. This portion, because it does not come into contact with air, almost certainly does not result in substandard water quality. Furthermore, compared to the prior art, because the amount of residual water in the first water outlet path is reduced, the proportion of freshly produced purified water in each cup of water collected by the user is higher. Therefore, the user experience is better.

[0007] For example, the water inlet path includes an inlet control valve and a booster pump connected in series along the water flow direction; the first filter device also has a concentrate outlet, and the water purifier further includes a concentrate control valve connected between the concentrate outlet and the drain outlet of the first filter device; the inlet control valve and the booster pump are configured to open according to a start-up purified water electrical signal, and the inlet control valve is configured to close according to a stop-up purified water electrical signal. The inlet control valve and the booster pump can be opened according to the start-up purified water electrical signal. The inlet control valve can open the water inlet path. The booster pump can pressurize the water. When the user has finished collecting purified water, the inlet control valve can be closed according to the stop-up purified water electrical signal. In this way, the inlet control valve can cut off the water inlet path.

[0008] For example, the pumping device is implemented by a booster pump, wherein the connection between the booster pump's outlet and the drain outlet is achieved via a first filter device and a concentrate control valve, and the drain water path includes a first check valve disposed thereon. Using a booster pump as the pumping device eliminates the need for an additional pump, thereby reducing the number of components within the water purifier and lowering manufacturing costs. Furthermore, during the operation of the booster pump for a first predetermined period, residual water in the air communication section of the first outlet water path flushes the first filter device, thereby extending its service life.

[0009] For example, the water purifier further includes: a purified water supply outlet; and a second water outlet path, the inlet of which is connected to the purified water outlet of the first filter device, and the outlet of which is connected to the purified water supply outlet, wherein: the closure of the inlet control valve and the operation of the booster pump for a first predetermined period of time are performed when the second water outlet path stops supplying purified water. The purified water supply outlet can be used to connect a water dispenser, a kettle, or any other suitable component to supply purified water. If the second water outlet path is still supplying purified water, the inlet control valve must remain open, and the booster pump must continue to operate normally to allow the first filter device to prepare purified water. Until the second water outlet path no longer supplies purified water, the inlet control valve can be closed, and the booster pump can operate for a first predetermined period of time to pump out any residual water in the air passage of the first water outlet path.

[0010] For example, the pumping device is configured as a water pump, and the connection between the water pump's outlet and the drain outlet is configured such that the water pump's outlet is directly connected to the drain outlet, or the water pump's outlet is connected to the drain outlet via a water pipe. Since the amount of water remaining in the air passage of the first outlet water path is usually small, a pump with a smaller displacement can be selected to reduce operating noise. Furthermore, the number of connecting components between the water pump's outlet and the drain outlet is small, which facilitates the discharge of residual water in the air passage of the first outlet water path. Also, compared to a booster pump, since the water pump is only used to extract residual water in the air passage of the first outlet water path, its control logic is relatively simple.

[0011] For example, the water purifier also includes an electronically controlled faucet, configured to generate a start-to-drink water electrical signal based on the user's start-to-drink water operation and a stop-to-drink water electrical signal based on the user's stop-to-drink water operation. The water outlet control valve includes a water purification control valve configured to open based on the start-to-drink water electrical signal and close based on the stop-to-drink water electrical signal. The electronically controlled faucet itself typically does not have the ability to shut off the water flow; instead, the water flow is controlled by the water purification control valve located on the first water outlet path to prevent leakage.

[0012] For example, the water outlet control valve includes the valve core of a mechanical faucet, and the inlet of the drain water path is adjacent to the valve core. The first water outlet path includes a second check valve and a first high-pressure switch connected in series along the water flow direction. The second check valve and the first high-pressure switch are located in the closed section. The first high-pressure switch is configured to generate a stop-from-water-taking electrical signal when the pressure in the water path is greater than or equal to a preset threshold, and to generate a start-from-water-taking electrical signal when the pressure in the water path is less than the preset threshold. When the inlet of the drain water path is adjacent to the valve core, the inlet of the drain water path can be closer to the bottom of the air-connecting section, and the pumping device can pump out as much residual water as possible from the air-connecting section downstream of the valve core.

[0013] For example, the mechanical faucet further includes: a valve body, the valve body including a water flow channel, the water flow channel being part of a first outlet water path, a valve core disposed on the valve body to control the opening and closing of the water flow channel; and a gooseneck tube, the inlet of the gooseneck tube being connected to the outlet of the water flow channel, wherein: the inlet of the drainage water path is connected to the valve body and communicates with the water flow channel downstream of the valve body. Since the inlet of the drainage water path is adjacent to the valve core, the pumping device can pump out the water remaining in the water flow channel downstream of the valve body and the gooseneck tube.

[0014] For example, the inlet water path includes a second filter device disposed thereon; the water purifier also includes a domestic water path, the inlet of which is connected to the outlet of the second filter device, and the outlet of which is connected to the outlet of the first outlet water path; and the pumping device is configured to operate for a second predetermined duration based on a signal indicating that domestic water intake has stopped. When the user stops drawing domestic water, some domestic water will remain in the air passage of the first outlet water path. After the user finishes drawing domestic water, the pumping device will operate for the second predetermined duration to pump the water remaining in the air passage of the first outlet water path to the drain water path, which can then be discharged outside the water purifier through the drain outlet.

[0015] For example, the water purifier also includes an electronically controlled faucet, configured to generate an electrical signal to stop drawing domestic water based on the user's operation to stop drawing domestic water. The domestic water circuit includes a domestic water control valve configured to close upon receiving the stop-drawing electrical signal. When the domestic water control valve closes, it can cut off the domestic water circuit, and the electronically controlled faucet can stop the flow of domestic water.

[0016] For example, the water outlet control valve includes a mechanical tap, and the domestic water circuit includes a water supply detection device disposed thereon. A stop-from-domestic-water electrical signal is generated when the water supply detection device detects a cessation of domestic water supply via the domestic water circuit. By providing the water supply detection device, the pumping device can be controlled to operate for a second predetermined period of time.

[0017] 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.

[0018] The advantages and features of this utility model will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] 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,

[0020] Figure 1 This is a water circuit diagram of a water purifier according to a first exemplary embodiment of the present invention;

[0021] Figure 2 A water circuit diagram of a water purifier according to a second exemplary embodiment of the present invention;

[0022] Figure 3 A water circuit diagram of a water purifier according to a third exemplary embodiment of the present invention;

[0023] Figure 4 A water circuit diagram for a water purifier according to a fourth exemplary embodiment of the present invention; and

[0024] Figure 5 This is a schematic diagram of the component structure of the mechanical faucet according to the present invention.

[0025] The above figures include the following reference numerals:

[0026] 100. Water purifier; 101. Main water inlet; 102. Drain outlet; 103. Purified water supply outlet; 210. Water inlet path; 220. First water outlet path; 221. Open section; 222. Closed section; 230. Drainage path; 240. Domestic water path; 250. Second water outlet path; 300. Faucet; 310. Electric faucet; 320. Mechanical faucet; 321. Valve core; 322. Valve body; 323. Water flow channel; 324. Gooseneck tube; 325. Handle; 41. 0. First filtration device; 411. Clean water outlet; 412. Concentrate outlet; 420. Inlet water control valve; 430. Concentrate control valve; 441. First check valve; 442. Second check valve; 443. Third check valve; 450. Clean water control valve; 461. First high-pressure switch; 462. Second high-pressure switch; 470. Second filtration device; 480. Water supply detection device; 490. Domestic water control valve; 500. Pumping device; 510. Booster pump; 520. Water pump. Detailed Implementation

[0027] 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.

[0028] Based on placement, water purifiers can be categorized into countertop and under-sink models. Countertop water purifiers can be placed on a countertop, and the filtered water is directly supplied to the user through the faucet. Countertop water purifiers are typically smaller to minimize countertop space. Under-sink water purifiers can be placed under cabinets, where there is more space, allowing for more powerful functions. Under-sink water purifiers can connect to a countertop faucet, providing purified water to the user through the countertop faucet.

[0029] Regardless of the type of water purifier used, even those employing pure water bubble membrane technology or reflux technology, the problem of substandard first cup water (especially the first cup water provided after a long standby period) persists. Furthermore, the inventors have found that this problem is more pronounced in water purifiers with electronically controlled faucets. Among the two types of water purifiers, the substandard first cup water problem is more significant in under-sink water purifiers. To at least partially solve the above problems, this utility model provides a water purifier. The following will describe the water purifier according to an embodiment of this utility model in detail with reference to the accompanying drawings.

[0030] like Figure 1As shown, the water purifier 100 may have a main water inlet 101 and a drain outlet 102. The main water inlet 101 can obtain water from municipal water supply or other suitable water sources. The water purifier 100 may include an inlet water path 210, a first filter device 410, a first outlet water path 220, a drain water path 230, and a pumping device 500. The inlet of the inlet water path 210 can be connected to the main water inlet 101. The raw water outlet of the first filter device 410 can be connected to the outlet of the inlet water path 210. The purified water outlet 411 of the first filter device 410 can be connected to the inlet of the first outlet water path 220. An outlet control valve may be provided on the first outlet water path 220. The outlet control valve can be used to control the opening and closing of the first outlet water path 220. The outlet control valve can divide the first outlet water path 220 into a closed section 222 and an air-connected section. The closed section 222 can be the portion of the first water outlet path 220 located upstream of the water outlet control valve. The air connection section can be the portion of the first water outlet path 220 located downstream of the water outlet control valve. The air connection section can communicate with the air via the outlet of the first water outlet path 220. The first water outlet path 220 can include a faucet 300 located at its outlet. The air connection section can communicate with the air via the outlet of the faucet 300. Therefore, the water purifier 100 can also include a faucet 300. The inlet of the drain path 230 can be connected to the air connection section of the first water outlet path 220. The outlet of the drain path 230 can be connected to the inlet of the pumping device 500. The outlet of the pumping device 500 can be connected to the drain outlet 102. The water outlet control valve can be configured to shut off the first water outlet path 220 in response to a user's cessation of water intake. It should be noted that the outlet water control valve can directly shut off the first outlet water path 220 in response to the user's operation to stop taking purified water, or the outlet water control valve can shut off the first outlet water path 220 based on a stop water taking electrical signal generated in response to the user's operation to stop taking purified water. The pumping device 500 can be configured to operate for a first predetermined period of time based on the stop water taking electrical signal.

[0031] exist Figure 1In the illustrated embodiment, the faucet 300 can be an electrically controlled faucet 310. The electrically controlled faucet 310 can respond to user operation and generate an electrical signal to control the water purifier 100 to produce or stop producing water. Furthermore, for miniaturization, the electrically controlled faucet 310 itself typically does not have the ability to shut off the water flow; instead, it controls the flow through a water purification control valve 450 located on the first water outlet path 220 to prevent leakage. Therefore, the water outlet control valve can include the water purification control valve 450. The water purification control valve 450 includes, but is not limited to, a solenoid valve, a pneumatic valve, or a hydraulic valve. Thus, in embodiments employing the electrically controlled faucet 310, the air connection section can include the open section 221 downstream of the water purification control valve 450 (see the dotted line in the figure) and the water flow channel within the electrically controlled faucet 310. The portion of the first water outlet path 220 upstream of the water purification control valve 450 can be a closed section 222, which is not connected to the air due to the shut-off effect of the water purification control valve 450. The following sections will describe in detail embodiments of the water outlet control valve, including the mechanical faucet.

[0032] In practical applications, water enters the water purifier 100 through the main inlet 101 and then flows into the first filter device 410 through the inlet water passage 210. The first filter device 410 filters the water to produce purified water. The purified water flows into the first outlet water passage 220 (passing sequentially through the closed section 222 and the air communication section) through the purified water outlet 411, and then flows out through the electric faucet 310. Users can collect purified water through the electric faucet 310.

[0033] Optionally, the stop-dispensing water electrical signal can be generated by the water purifier 100 in response to the user's operation of stopping water dispensing. In one set of embodiments, the water purifier 100 may be provided with an input device that can receive user operations and generate a stop-dispensing water electrical signal. The input device may include one or more of a touch screen, buttons, keyboard, mouse, voice input device, etc. In another set of embodiments, the water purifier 100 may include a sensor. The sensor can directly detect the user's operation of stopping water dispensing and generate a stop-dispensing water electrical signal. For example, the sensor may include a contact switch or proximity switch provided on the faucet 300. Alternatively, the sensor can detect the change in the state of the water purifier 100 caused by the user's operation of stopping water dispensing and generate a stop-dispensing water electrical signal; this embodiment will be described in more detail later.

[0034] Optionally, the stop water dispensing electrical signal can be received by the water purifier 100. For example, an external device (such as a mobile device or a central control panel) can receive the user's stop water dispensing operation and generate a stop water dispensing electrical signal. Subsequently, the external device can send the stop water dispensing electrical signal to the water purifier 100.

[0035] It should be noted that the stop water dispensing electrical signal is generated in response to the user switching from dispensing purified water to stopping water dispensing. Accordingly, the water purifier 100 can switch from supplying purified water to stopping water supply based on this stop water dispensing electrical signal. The pumping device 500 can operate for a first predetermined time based on this stop water dispensing electrical signal. In this way, after the user finishes dispensing purified water, the purified water control valve 450 can close based on the stop water dispensing electrical signal, thereby cutting off the first water outlet path 220. In this way, the air connection section no longer enters purified water. The water remaining in the first water outlet path 220 can be pumped out by the pumping device 500 to the drain path 230, and then discharged out of the water purifier 100 through the drain outlet 102. It should also be noted that the outlet of the pumping device 500 can be directly connected to the drain outlet 102, or it can be indirectly connected to the drain outlet 102 through other components, as long as the water remaining in the first water outlet path 220 can be discharged.

[0036] The pumping device 500 may operate for a first predetermined duration based on a stop-from-purified-water electrical signal, which can include various scenarios. Based on the structure of the water purifier 100, the pumping device 500 may be in a stopped state when the water purifier 100 is supplying purified water. Based on the stop-from-purified-water electrical signal, the pumping device 500 may start and operate for the first predetermined duration. Alternatively, based on the structure of the water purifier 100, the pumping device 500 may be in an operating state when the water purifier 100 is supplying purified water. Based on the stop-from-purified-water electrical signal, the pumping device 500 may continue to operate for the first predetermined duration. For example, the first predetermined duration may be 1 second, 2 seconds, 3 seconds, 4 seconds, or any other suitable duration. Those skilled in the art can select the first predetermined duration based on factors such as the length of the air connection section of the first water outlet path 220 and / or the discharge capacity of the pumping device 500.

[0037] In summary, in the water purifier 100 provided in this embodiment of the present invention, after the user has finished collecting purified water, since the air connection section of the first water outlet 220 no longer receives purified water, and the pumping device 500 will run for a first predetermined period of time, the residual water in the air connection section of the first water outlet 220 can be pumped out by the pumping device 500 and discharged outside the water purifier 100 through the drain outlet 102. Thus, no residual water can be achieved in the air connection section of the first water outlet 220, and therefore no contaminated water will exist. In this way, when the water purifier 100 provides purified water again, the vast majority of the purified water flowing out of the outlet of the first water outlet 220 is freshly produced by the first filtration device 410, and only a small portion of the water is residual from the original water path, such as the water remaining in the closed section 222 of the first water outlet 220. This portion, because it does not come into contact with air, almost will not result in substandard water quality. Furthermore, compared to existing technologies, because the amount of residual water in the first water outlet 220 is reduced, the proportion of freshly made purified water in each cup of water dispensed by the user will be higher. This results in a better user experience.

[0038] For example, such as Figure 1 As shown, the water inlet path 210 may include an inlet control valve 420 and a booster pump 510 connected in series along the water flow direction. The inlet control valve 420 may employ various types of control valves known in the art or that may emerge in the future, including but not limited to solenoid valves, pneumatic valves, or hydraulic valves. The first filtration device 410 may also have a concentrate outlet 412. The first filtration device 410 may include one or more of, for example, reverse osmosis filter cartridges and nanofiltration filter cartridges. The water purifier 100 may also include a concentrate control valve 430. The concentrate control valve 430 may employ various types of control valves known in the art or that may emerge in the future, including but not limited to solenoid valves, pneumatic valves, or hydraulic valves. The concentrate control valve 430 may be connected between the concentrate outlet 412 and the drain outlet 102 of the first filtration device 410. The inlet control valve 420 and the booster pump 510 may be configured to open upon a signal indicating the start of purified water intake.

[0039] Similar to the stop water dispensing signal, optionally, the start water dispensing signal can be generated by the water purifier 100 in response to a user's start water dispensing operation. In one set of embodiments, the water purifier 100 may be equipped with an input device that can receive user operations and generate the start water dispensing signal. The input device may include one or more of a touchscreen, buttons, keyboard, mouse, voice input device, etc. In another set of embodiments, the water purifier 100 may include a sensor. The sensor can directly detect the user's start water dispensing operation and generate the start water dispensing signal. For example, the sensor may include a contact switch or proximity switch disposed on the faucet 300. Alternatively, the sensor can detect a change in the state of the water purifier 100 caused by the user's start water dispensing operation and generate the start water dispensing signal; this embodiment will be described in more detail later.

[0040] Optionally, the start water dispensing electrical signal can be received by the water purifier 100. For example, an external device (such as a mobile device or a central control panel) can receive the user's start water dispensing operation and generate a start water dispensing electrical signal. Subsequently, the external device can send the start water dispensing electrical signal to the water purifier 100. Exemplarily, the start water dispensing electrical signal and the stop water dispensing electrical signal can be generated by the same component or by different components.

[0041] It should be noted that the "start water extraction" electrical signal is generated in response to the user switching from not extracting purified water to extracting purified water. Correspondingly, the water purifier 100 can switch from not supplying purified water to supplying purified water based on this signal. The inlet control valve 420 and the booster pump 510 can be opened based on the "start water extraction" electrical signal. The inlet control valve 420 can open the inlet water path 210. The booster pump 510 can pressurize the water. Thus, water can enter the first filter device 410 along the inlet water path 210. The first filter device 410 can filter the water to produce purified water. During the purification process, the concentrated water produced by the first filter device 410 can sequentially pass through the concentrated water outlet 412, the concentrated water control valve 430, and then be discharged outside the water purifier 100 through the drain outlet 102. The concentrated water control valve 430 may include a wastewater ratio valve. The wastewater ratio valve allows the first filtration device 410 to produce concentrated water at a certain ratio during the water purification process. This maintains the pressure within the first filtration device 410 to ensure normal water purification and allows impurities in the water to be discharged promptly through the wastewater ratio valve, thus extending the service life of the first filtration device 410. For example, the concentrated water control valve 430 may also include an on / off valve. When the on / off valve is open, wastewater can pass through the concentrated water control valve 430 at a larger flow rate. When the on / off valve is closed, wastewater can only be discharged through the wastewater ratio valve, thereby limiting the wastewater flow rate. For example, the wastewater ratio valve can be connected in parallel with the on / off valve. For example, the wastewater ratio valve can be configured as a through-hole located at any suitable position within the on / off valve, allowing water to flow through when the on / off valve is closed. After the user has finished collecting purified water, the inlet water control valve 420 can be closed based on a stop-collection water electrical signal. Thus, the inlet water control valve 420 can cut off the inlet water path 210.

[0042] like Figure 1As shown, the pumping device 500 can be implemented by a booster pump 510. In this case, the connection between the outlet of the pumping device 500 and the drain outlet 102 can be achieved via the first filter device 410 and the concentrate control valve 430. The drain passage 230 may include a first check valve 441 disposed thereon. With this configuration, when the inlet control valve 420 is closed according to the stop water intake electrical signal, the booster pump 510 will continue to run for a first predetermined period of time according to the stop water intake electrical signal. During this process, the water remaining in the air communication section of the first outlet passage 220 will be drawn by the booster pump 510 and pass through the drain passage 230, the first filter device 410, and the concentrate control valve 430 in sequence, and then discharged to the outside of the water purifier 100 through the drain outlet 102. For example, the water remaining in the air communication section of the first outlet passage 220 can be discharged through the on / off valve of the concentrate control valve 430, or through the wastewater ratio valve of the concentrate control valve 430. The first check valve 441 can be unidirectionally directed toward the booster pump 510. When the booster pump 510 stops operating, the first check valve 441 prevents water from flowing back into the air passage of the first outlet water passage 220 from the downstream drain water passage 230. Furthermore, when the user draws water again, when the inlet control valve 420 and the booster pump 510 are opened according to the start of purified water draw electrical signal, water will not pass through the drain water passage 230 due to the cut-off of the first check valve 441, and thus can enter the first filter device 410 through the booster pump 510, thereby enabling the first filter device 410 to normally produce purified water.

[0043] In this embodiment, the booster pump 510 is used as the pumping device 500, eliminating the need for an additional pump. This reduces the number of components in the water purifier 100 and lowers manufacturing costs. Furthermore, during the first predetermined operating time, the booster pump 510 also flushes the first filter device 410 with residual water in the air passage of the first water outlet 220, thereby extending the service life of the first filter device 410.

[0044] For example, such as Figure 1As shown, the electric faucet 310 can be configured to generate a start water dispensing electrical signal in response to a user's start water dispensing operation, and to generate a stop water dispensing electrical signal in response to a user's stop water dispensing operation. For example, the electric faucet 310 can be equipped with a start water dispensing button and a stop water dispensing button. The user can click the start water dispensing button to cause the electric faucet 310 to generate a start water dispensing electrical signal. Similarly, the user can click the stop water dispensing button to cause the electric faucet 310 to generate a stop water dispensing electrical signal. The electric faucet 310 can be used in conjunction with a water purification control valve 450 on the first water outlet passage 220. The water purification control valve 450 can be configured to open according to the start water dispensing electrical signal and close according to the stop water dispensing electrical signal. The inlet of the drain passage 230 can be connected to an air connection section. With this configuration, when the water purification control valve 450 opens according to the start water extraction electrical signal, the purified water prepared by the first filtration device 410 can flow through the first water outlet 220 and thus through the electric faucet 310. When the water purification control valve 450 closes according to the stop water extraction electrical signal, the purified water prepared by the first filtration device 410 cannot flow through the first water outlet 220, and the electric faucet 310 no longer dispenses purified water. Furthermore, in the embodiment where the pumping device 500 is implemented by the booster pump 510, when the booster pump 510 runs for a first predetermined period of time, since the water purification control valve 450 is closed, the water remaining in the air communication section of the first water outlet 220 is drawn into the first filtration device 410 by the booster pump 510. This water cannot pass through the water purification control valve 450 and therefore can only pass through the concentrate control valve 430, and then can be discharged outside the water purifier 100 through the drain outlet 102.

[0045] For example, such as Figure 1 As shown, the inlet water path 210 may further include a second filter device 470 disposed thereon. The water purifier 100 may also include a domestic water path 240. The second filter device 470 may include one or more of, for example, PP cotton filter cartridges and activated carbon filter cartridges. The inlet of the domestic water path 240 may be connected to the outlet of the second filter device 470. The outlet of the domestic water path 240 may be connected to the outlet of the first outlet water path 220. The pumping device 500 may be configured to operate for a second predetermined period of time based on a signal indicating that domestic water intake has stopped.

[0046] Similar to the signals for starting and stopping purified water extraction, the signals for starting and stopping domestic water extraction can be generated by the water purifier 100 in response to the user's operation of starting and stopping domestic water extraction, or they can be received by the water purifier 100. The underlying principles of the signals for starting and stopping domestic water extraction are similar to those described above for the signals for starting and stopping purified water extraction; for simplicity, they will not be repeated here.

[0047] It should be noted that the "start drawing domestic water and electricity" signal is generated in response to the user switching from not drawing domestic water to drawing domestic water. Accordingly, the water purifier 100 can switch from not supplying domestic water to supplying domestic water based on this signal. The "stop drawing domestic water and electricity" signal is generated in response to the user switching from drawing domestic water to stopping drawing domestic water. Accordingly, the water purifier 100 can switch from supplying domestic water to stopping supplying domestic water based on this signal.

[0048] In practical applications, water sequentially enters the second filter device 470 through the main inlet 101 and the inlet water passage 210. The second filter device 470 filters the water to prepare domestic water. Domestic water is then supplied to the user sequentially through the domestic water passage 240 and the first outlet water passage 220. The domestic water filtered by the second filter device 470 can also be further filtered by the first filter device 410 to become purified water, which is then supplied to the user through the first outlet water passage 220. For example, when the inlet control valve 420 and the booster pump 510 are activated according to the start of purified water intake electrical signal, they can pressurize the domestic water filtered by the second filter device 470 and deliver it to the first filter device 410 for further filtration. The booster pump 510 can run for a second predetermined duration according to the stop of domestic water intake electrical signal. For some faucets, there is only one outlet, so domestic water and purified water share an air connection section (i.e., a shared section). Thus, when the user stops drawing domestic water, domestic water will remain in the air connection section of the first outlet water passage 220. After the user collects domestic water, the pumping device 500 will operate for a second predetermined period of time to pump the residual water (especially the residual water in the common section) in the air connection section of the first water outlet 220 to the drain water section 230, and then discharge it to the outside of the water purifier 100 through the drain outlet 102. For example, the second predetermined period of time can be 1 second, 2 seconds, 3 seconds, 4 seconds, or any other suitable duration. Those skilled in the art can select the second predetermined period of time based on factors such as the length of the common section and / or the discharge capacity of the pumping device 500. The second predetermined period of time and the first predetermined period of time can be the same or different.

[0049] For example, such as Figure 1As shown, the electric faucet 310 can be configured to generate a start-to-drainage electrical signal in response to a user's start-to-drainage operation. The electric faucet 310 can also be configured to generate a stop-to-drainage electrical signal in response to a user's stop-to-drainage operation. Exemplarily, the electric faucet 310 may be equipped with a start-to-drainage button and a stop-to-drainage button. The user can click the start-to-drainage button to generate the start-to-drainage electrical signal. The user can click the stop-to-drainage button to generate the stop-to-drainage electrical signal. The domestic water passage 240 may include a domestic water control valve 490 disposed thereon. The domestic water control valve 490 can be configured to open upon the start-to-drainage electrical signal. The domestic water control valve 490 can be of various types of control valves known in the art or likely to emerge in the future, including but not limited to solenoid valves, pneumatic valves, or hydraulic valves. When the domestic water control valve 490 is closed, it can cut off the domestic water supply path 240, and the electric faucet 310 can stop the flow of domestic water.

[0050] For example, such as Figure 1As shown, the water purifier 100 may further include a purified water supply port 103 and a second water outlet path 250. The purified water supply port 103 can be used to connect to a water dispenser, kettle, or any other suitable component to supply purified water. For ease of description, the following description will use the example of the purified water supply port 103 being connected to a water dispenser. The inlet of the second water outlet path 250 can be connected to the purified water outlet 411 of the first filter device 410. For example, the inlet of the second water outlet path 250 can be directly connected to the purified water outlet 411 of the first filter device 410. Alternatively, the inlet of the second water outlet path 250 can be connected to the closed section 222 of the first water outlet path 220, so as to connect to the purified water outlet 411 of the first filter device 410 through the closed section 222. The outlet of the second water outlet path 250 can be connected to the purified water supply port 103. The purified water produced by the first filtration device 410 can also be supplied to the water dispenser through the second water outlet 250 and the purified water supply port 103. The closing of the inlet control valve 420 and the operation of the booster pump 510 for a first predetermined period of time are executed when the second water outlet 250 stops supplying purified water. That is, when the first water outlet 220 and the second water outlet 250 supply purified water simultaneously, when a stop-supply-purified-water electrical signal is generated, it is necessary to determine whether the second water outlet 250 is still supplying purified water. If the second water outlet 250 is still supplying purified water, the inlet control valve 420 must remain open and the booster pump 510 must continue to operate normally so that the first filtration device 410 can produce purified water. When the second water outlet 250 stops supplying clean water (i.e., clean water no longer flows out of the outlet of the second water outlet 250), the inlet control valve 420 can be closed, and the booster pump 510 can run for a first predetermined period of time to pump out the water remaining in the air connection section of the first water outlet 220.

[0051] There are various embodiments for the water purifier 100 to determine whether the second water outlet 250 is supplying purified water. Optionally, the second water outlet 250 may include a third check valve 443 and a second high-pressure switch 462 connected in series along the water flow direction. The third check valve 443 can be unidirectionally open towards the purified water supply port 103. The second high-pressure switch 462 can be configured to generate a second stop-from-purified-water electrical signal when the pressure in its water circuit (i.e., the second water outlet 250) is greater than or equal to a preset threshold. Furthermore, the second high-pressure switch 462 can be configured to generate a second start-from-purified-water electrical signal when the pressure in its water circuit (i.e., the second water outlet 250) is less than a preset threshold. When the user controls the water dispenser to close, the pressure in the second water outlet 250 downstream of the third check valve 443 will gradually rise to the preset threshold, and then the second high-pressure switch 462 can generate a second stop-from-purified-water electrical signal. Thus, the water purifier 100 can determine that the second water outlet 250 is no longer supplying purified water. Optionally, the second stop-from-water-dispensing electrical signal can be received by the water purifier 100. For example, an external device (such as a water dispenser, mobile device, or central control panel) can receive the user's second stop-from-water-dispensing operation and generate a second stop-from-water-dispensing electrical signal. Subsequently, the external device can send the second stop-from-water-dispensing electrical signal to the water purifier 100.

[0052] For example, such as Figure 2 and Figure 5As shown, faucet 300 can be a mechanical faucet 320. Mechanical faucet 320 can include valve core 321. A water outlet control valve can include valve core 321. Valve core 321 can be used to control the opening and closing of mechanical faucet 320. An air connection section can be the portion of the first water outlet path 220 located downstream of valve core 321. A closed section 222 can be the portion of the first water outlet path 220 located upstream of valve core 321. The inlet of drain path 230 can be connected to the mechanical faucet 320 downstream of valve core 321 to communicate with the air connection section. Furthermore, the inlet of drain path 230 can be adjacent to valve core 321. Mechanical faucet 320 can also typically be equipped with a handle 325. Handle 325 can be connected to valve core 321, allowing the user to move handle 325 to control the opening and closing of mechanical faucet 320 via valve core 321. The first water outlet path 220 can include a second check valve 442 and a first high-pressure switch 461 connected in series along the water flow direction. A second check valve 442 and a first high-pressure switch 461 can be located in the closed section 222. The second check valve 442 can be unidirectionally open toward the first high-pressure switch 461. The first high-pressure switch 461 can be configured to generate a stop-from-water-drawing electrical signal when the pressure in the water path (i.e., the closed section 222) is greater than or equal to a preset threshold. Furthermore, the first high-pressure switch 461 can be configured to generate a start-from-water-drawing electrical signal when the pressure in the water path (i.e., the closed section 222) is less than a preset threshold. The user's stop-from-water-drawing operation can be to close the valve core 321 of the mechanical faucet 320. That is, when the user closes the valve core 321 of the mechanical faucet 320, clean water no longer enters the air passage. When the user closes the valve core 321 of the mechanical faucet 320, the pressure in the closed section 222 will gradually rise to the preset threshold, and then the first high-pressure switch 461 can generate a stop-from-water-drawing electrical signal. Then, the pumping device 500 can pump out the water remaining in the air passage downstream of the valve core 321 through the drainage water path 230. Since the valve core 321 of the mechanical faucet 320 is usually closer to the countertop, compared to the outlet of the mechanical faucet 320, when the inlet of the drainage channel 230 is adjacent to the valve core 321, the inlet of the drainage channel 230 can be closer to the bottom of the air connection section, and the pumping device 500 can pump out the water remaining in the air connection section downstream of the valve core 321 as much as possible.

[0053] For example, such as Figure 2 and Figure 5As shown, the mechanical faucet 320 may also include a valve body 322 and a gooseneck tube 324. The valve body 322 may include a water flow channel 323. The water flow channel 323 may be part of the first outlet water passage 220. A valve core 321 may be disposed on the valve body 322 to control the opening and closing of the water flow channel 323. The inlet of the gooseneck tube 324 may be connected to the outlet of the water flow channel 323. When the valve core 321 is open, clean water can flow through the water flow channel 323 and thus out through the gooseneck tube 324. The inlet of the drain water passage 230 may be connected to the valve body 322 to communicate with the air connection section. In this way, since the inlet of the drain water passage 230 is adjacent to the valve core 321, the pumping device 500 can pump out the water remaining in the water flow channel 323 and the gooseneck tube 324 downstream of the valve body 322.

[0054] Compared to the mechanical faucet 320, the air passage of the electrically controlled faucet 310 is significantly longer because the valve core 321 is located on the mechanical faucet 320. If the residual water inside is not removed, the problem of the first cup of water being substandard is more pronounced in water purifiers using the electrically controlled faucet 310. For countertop and under-sink water purifiers, the problem is even more pronounced because under-sink water purifiers are positioned lower and are more prone to retaining water.

[0055] For example, such as Figure 2 As shown, the domestic water supply path 240 may include a water supply detection device 480 disposed thereon. A stop domestic water supply signal can be generated when the water supply detection device 480 detects a cessation of domestic water supply via the domestic water supply path 240. The water supply detection device 480 may include one or more of, for example, a high-pressure switch and a flow meter. A stop domestic water supply signal can be generated when the user closes the valve core 321 of the mechanical faucet 320. By setting the water supply detection device 480, the pumping device 500 can be controlled to operate for a second predetermined period of time.

[0056] For example, in an embodiment where the water supply detection device 480 includes a high-pressure switch, when the user closes the valve core 321 of the mechanical faucet 320, the high-pressure switch can be configured to generate a stop-from-collection-of-domestic-water-electricity signal when the pressure in the water circuit (i.e., domestic water circuit 240) is greater than or equal to a preset threshold. Furthermore, the high-pressure switch can be configured to generate a start-from-collection-of-domestic-water-electricity signal when the pressure in the water circuit (i.e., domestic water circuit 240) is less than the preset threshold. After the user closes the valve core 321 of the mechanical faucet 320, the pressure in the domestic water circuit 240 gradually rises to the preset threshold, and then the high-pressure switch can generate a stop-from-collection-of-domestic-water-electricity signal.

[0057] For example, in an embodiment where the water supply detection device 480 includes a flow meter, the flow meter can detect the flow rate of water passing through the domestic water passage 240. For example, when the domestic water passage 240 supplies domestic water, the flow meter can output a high level; when the domestic water passage 240 stops supplying domestic water, the flow meter can output a low level. When the level switches from high to low, a stop-from-domestic-water-electricity signal can be generated; when the level switches from low to high, a start-from-domestic-water-electricity signal can be generated. For example, the water purifier 100 may also include a control device. The flow meter can send the detected flow rate of the domestic water passage 240 to the control device. The control device can compare the flow rate with a preset threshold. When the flow rate is less than the preset threshold, a stop-from-domestic-water-electricity signal can be generated. The control device can also compare the flow rate with the preset threshold. When the flow rate is greater than or equal to the preset threshold, a start-from-domestic-water-electricity signal can be generated. That is, the stop-from-domestic-water-electricity signal can be generated by the flow meter or any other suitable component; this invention is not limited to this.

[0058] For example, such as Figures 3 to 4 As shown, the pumping device 500 can be configured as a water pump 520. The water pump 520 can be any type of pump known in the art or likely to emerge in the future, including but not limited to diaphragm pumps. The inlet of the water pump 520 can be connected to an air connection section. Figure 3 As shown, the inlet of the water pump 520 can be connected to the air connection section downstream of the water purification control valve 450. Figure 4 As shown, the inlet of the water pump 520 can be connected to the air passage downstream of the valve core 321 of the mechanical faucet 320. The connection between the outlet of the water pump 520 and the drain outlet 102 can be configured such that the outlet of the water pump 520 can be directly connected to the drain outlet 102, or the outlet of the water pump 520 can be connected to the drain outlet 102 through a water pipe. With this configuration, the water remaining in the air passage of the first water outlet 220 can be pumped out by the water pump 520 to the drain water passage 230, and then discharged to the outside of the water purifier 100 through the drain outlet 102. Since the amount of water remaining in the air passage of the first water outlet 220 is usually small, the water pump 520 can be selected with a smaller displacement pump, thereby reducing the noise during operation. Furthermore, there are fewer connecting parts between the outlet of the water pump 520 and the drain outlet 102, which facilitates the discharge of water remaining in the air passage of the first water outlet 220. Furthermore, compared to the booster pump 510, the water pump 520 is only used to extract residual water in the air connection section of the first water outlet 220, so its control logic is relatively simple.

[0059] for Figures 1 to 4In the illustrated embodiments, the same or similar components are referred to by the same reference numerals, and for the sake of brevity, these same or similar components will not be described in detail herein. Unless otherwise specified or obviously contradictory, one or more features mentioned above can be combined arbitrarily.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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, having a main water inlet and a drain outlet, characterized in that, include: A water inlet channel, wherein the inlet of the water inlet channel is connected to the main water inlet; The first filtration device has its raw water inlet connected to the outlet of the inlet water path. The first water outlet path is connected to the water inlet of the first water outlet path. The first water outlet path is equipped with a water outlet control valve, which divides the first water outlet path into an upstream closed section and a downstream air-connected section that communicates with the air through the water outlet of the first water outlet path. A drainage waterway, wherein the inlet of the drainage waterway is connected to the air connection section; as well as A pumping device, wherein the outlet of the drainage channel is connected to the inlet of the pumping device, and the outlet of the pumping device is connected to the drainage outlet, wherein: The water outlet control valve is configured to shut off the first water outlet path in response to the user's operation to stop taking purified water, and the pumping device is configured to operate for a first predetermined duration based on the electrical signal indicating that taking purified water has stopped.

2. The water purifier as described in claim 1, characterized in that, The water inlet circuit includes an inlet control valve and a booster pump connected in series along the water flow direction; The first filtration device also has a concentrate outlet, and the water purifier further includes a concentrate control valve, which is connected between the concentrate outlet and the drain outlet of the first filtration device; and The water inlet control valve and the booster pump are configured to open upon the start of purified water intake electrical signal, and the water inlet control valve is configured to close upon the stop of purified water intake electrical signal.

3. The water purifier as described in claim 2, characterized in that, The pumping device is implemented by the booster pump, wherein the outlet of the booster pump is connected to the outlet of the drain via the first filter and the concentrate control valve. The drainage path includes a first check valve installed thereon.

4. The water purifier as described in claim 3, characterized in that, The water purifier also includes: Water purification supply outlet; and The second water outlet path has its inlet connected to the purified water outlet of the first filter device, and its outlet connected to the purified water supply port. Wherein: the closing of the inlet control valve and the operation of the booster pump for the first predetermined duration are executed when the second outlet water circuit stops supplying purified water.

5. The water purifier as described in claim 1 or 2, characterized in that, The pumping device is configured as a water pump. The connection between the outlet of the water pump and the outlet of the drain is configured such that the outlet of the water pump is directly connected to the outlet of the drain, or the outlet of the water pump is connected to the outlet of the drain via a water pipe.

6. The water purifier as described in claim 1, characterized in that, The water purifier also includes an electronically controlled faucet, which is configured to generate a start water dispensing electrical signal based on the user's start water dispensing operation and to generate a stop water dispensing electrical signal based on the user's stop water dispensing operation. The water outlet control valve includes a purified water control valve, which is configured to open according to the start purified water intake electrical signal and close according to the stop purified water intake electrical signal.

7. The water purifier as described in claim 1, characterized in that, The water outlet control valve includes the valve core of a mechanical faucet, and the water inlet of the drainage path is adjacent to the valve core. The first water outlet path includes a second check valve and a first high-pressure switch connected in series along the water flow direction. The second check valve and the first high-pressure switch are located in the closed section. The first high-pressure switch is configured to generate a stop water extraction electrical signal when the pressure in the water circuit is greater than or equal to a preset threshold, and to generate a start water extraction electrical signal when the pressure in the water circuit is less than the preset threshold.

8. The water purifier as described in claim 7, characterized in that, The mechanical faucet also includes: A valve body, comprising a water flow channel that is part of the first water outlet path, and a valve core disposed on the valve body to control the opening and closing of the water flow channel; and A gooseneck tube, wherein the inlet of the gooseneck tube is connected to the outlet of the water flow channel, wherein: The inlet of the drainage channel is connected to the valve body and communicates with the water flow channel downstream of the valve body.

9. The water purifier as described in claim 1, characterized in that, The water inlet path includes a second filter device installed thereon; The water purifier also includes a domestic water supply path, the inlet of which is connected to the outlet of the second filter device, and the outlet of which is connected to the outlet of the first water supply path; and The pumping device is configured to operate for a second predetermined period of time based on the signal to stop drawing domestic water and electricity.

10. The water purifier as described in claim 9, characterized in that, The water purifier also includes an electrically controlled faucet, which is configured to generate a stop-from-domestic-water electrical signal based on the user's operation to stop drawing domestic water. The domestic water circuit includes a domestic water control valve configured to close based on the stop-from-domestic-water electrical signal; or The water outlet control valve includes a mechanical tap, and the domestic water circuit includes a water supply detection device installed thereon. The stop domestic water supply signal is generated when the water supply detection device detects that domestic water supply has stopped through the domestic water circuit.

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