Table type water purifying and drinking machine

Abstract

The invention provides a table type water purifying and drinking machine which comprises a raw water tank, a booster pump, a water purifying assembly, a flow control assembly, a backflow pipeline and a concentrated water discharging assembly, and the raw water tank is used for storing raw water; the booster pump is used for pumping raw water from the raw water tank and pressurizing the raw water; the water purification assembly is used for filtering raw water and providing high-quality purified water for a user; the flow control assembly is used for limiting the water flow output by the water intake; the return pipeline is used for reducing the pressure in the pipeline; and the concentrated water discharge assembly is used for discharging residual concentrated water after filtration. By adopting the large-flux water purifying assembly and arranging the flow control assembly, the table type water purifying and drinking machine does not need to be provided with a water purifying tank, a user can adjust the flow of purified water for taking water according to own requirements, the purified water can be prepared when being used during water taking, and the purified water is fresher. The backflow pipeline can reduce pipeline pressure during water taking, and the service life of the table type water purifying and drinking machine is prolonged.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, specifically to a countertop water purifier. Background Technology

[0002] With the development of the times, water purifiers have been recognized and purchased by most people, as they can meet users' higher requirements for water quality.

[0003] Countertop water purifiers are popular due to their ease of installation and use, typically requiring no professional installation. They are equipped with a raw water tank, which filters the raw water to provide purified water to the user. Countertop water purifiers often use reverse osmosis (RO) filters, which are categorized into high-flow and low-flow filters based on daily water production. Common countertop water purifiers use low-flow filters, with a daily water production of no more than 400 gallons. To avoid long waiting times for users to dispense water, a purified water tank is usually included to store the purified water. The purified water can be prepared in advance and stored in the tank when the user is not using water, ensuring a consistent water supply.

[0004] Countertop water purifiers with a water tank require water level control, making the control logic relatively complex. The water tank needs frequent cleaning, which is a difficult process. Furthermore, the water tank is typically quite large, making it difficult to create a compact countertop water purifier. When not in use, the countertop water purifier also produces water-making noise, affecting the user experience. Summary of the Invention

[0005] To at least partially address the problems existing in the prior art, some embodiments of the present invention provide a countertop water purifier with a water inlet for dispensing purified water. The countertop water purifier includes: a raw water tank including a water tank outlet; a booster pump with its inlet connected to the water tank outlet; a water purification component including a raw water inlet, a purified water outlet, and a concentrated water outlet, the raw water inlet connected to the booster pump outlet; a flow control component with its inlet connected to the purified water outlet and its outlet connected to the water inlet; a return pipe with its inlet connected to the flow control component's inlet and its outlet connected to the booster pump inlet; and a concentrated water discharge component connected to the concentrated water outlet. By employing a high-flow-rate water purification component and incorporating a flow control component and a return pipe, users can adjust the purified water flow rate according to their needs. The return pipe can reduce pipe pressure during water dispensing, extending the service life of the countertop water purifier. Using high-flow-rate water purification components, countertop water purifiers eliminate the need for a water tank, allowing users to obtain fresh water on demand. Tank-free countertop water purifiers are also more compact and easier to maintain. The booster pump remains inactive when not in use, only producing noise when water is being dispensed, thus enhancing the user experience.

[0006] For example, the countertop water purifier also includes a drain outlet connected to the outside. The concentrated water discharge component includes a concentrated water discharge pipe, with the inlet of the concentrated water discharge pipe connected to the concentrated water outlet and the outlet connected to the drain outlet. The drain outlet can be connected to a drain pipe, which can be connected to a sewer or a container for collecting concentrated water. Users can use the concentrated water in the container for various purposes as needed. This solution is particularly suitable when the application scenario of the countertop water purifier includes drainage facilities. In the above technical solution, users can store or discard the concentrated water discharged through the drain outlet as needed, thereby increasing the diversity of user choices. Users can reuse the collected concentrated water to save water. While using the raw water tank for water supply, directly discharging concentrated water through the drain outlet, compared to returning the concentrated water to the raw water tank, can maintain the water quality in the raw water tank unchanged, which can extend the service life of the water purification component to a certain extent. After using the countertop water purifier for the first time or after replacing the water purification component, the concentrated water proportioning valve can be opened to flush the water purification component and clean the protective fluid. After using the water purification components for a period of time, the concentrate ratio valve can be opened to flush the components, thereby removing dirt from their surface and extending their lifespan. During the flushing process, countertop water purifiers with drain outlets can quickly discharge contaminated water after flushing instead of it flowing back into the original water tank, ensuring that the water used to flush the components remains relatively clean and improving the flushing efficiency.

[0007] For example, the raw water tank is detachable and includes a concentrate inlet. The concentrate discharge assembly includes a concentrate return pipe, with its inlet connected to a concentrate outlet and its outlet connected to the concentrate inlet. The raw water tank's inlet can have the same opening as the tank's outlet, reducing the number of openings and simplifying the structure. Both the inlet and outlet can be located at the bottom of the raw water tank. The inlet can have a large opening and a cover to facilitate user injection of raw water and prevent spillage. The inlet can be located at the bottom of the raw water tank. This simplifies the upper part of the tank and improves the user experience. The detachable raw water tank allows users to easily move it to a water source location, such as a tap. For ease of transport, a handle or similar structure can be provided on the top of the raw water tank. With a handle on the top, placing the inlet at the bottom of the tank prevents the handle from obstructing the injection of raw water. The raw water tank can be installed into the countertop water purifier after being filled with sufficient raw water. When the raw water tank is installed, its inlet connects to the raw water inlet, thus supplying raw water to the purification components. Since it may be inconvenient to drain concentrated water externally from the countertop water purifier, it can be drained back into the raw water tank via a concentrated water return pipe. A partition can be installed inside the raw water tank to partially separate the concentrated water inlet and the water outlet, reducing the proportion of concentrated water mixing with the raw water or preventing them from mixing altogether. The removable raw water tank allows users to easily remove the concentrated water that has returned via the concentrated water return pipe.

[0008] For example, the countertop water purifier also includes a drain outlet connected to the outside, and the concentrated water discharge assembly further includes: a concentrated water discharge pipe, the inlet of which is connected to a concentrated water outlet, and the outlet of which is connected to the drain outlet; and a valve assembly, which is used to control the concentrated water return pipe to be shut off at least in a predetermined direction when the concentrated water discharge pipe is open, the predetermined direction being from the concentrated water inlet of the water tank to the concentrated water outlet of the water purification assembly. It is easy to understand that if the valve assembly is not provided, raw water in the raw water tank may enter the concentrated water discharge pipe through the concentrated water return pipe and flow out from the drain outlet when the concentrated water discharge pipe is open.

[0009] For example, the concentrated water discharge line can be shut off. By shutting off the concentrated water discharge line, the countertop water purifier can be switched from a mode where concentrated water is discharged through the drain to a mode where concentrated water returns to the original water tank, making it suitable for various application scenarios. Moreover, it also allows the countertop water purifier to be standardized, enabling users to choose the drainage mode according to their usage environment.

[0010] For example, the countertop water purifier also includes a sealing element for opening or closing the drain outlet, wherein the concentrated wastewater discharge line is shut off when the sealing element closes the drain outlet. This allows for switching the concentrated wastewater discharge method of the countertop water purifier at a low cost without the need for control. In embodiments not shown, the sealing element may also include a mechanical valve or faucet located at the drain outlet.

[0011] For example, the countertop water purifier also includes a first concentrated water solenoid valve installed on the concentrated water discharge pipe, which shuts off the concentrated water discharge pipe when the first concentrated water solenoid valve is closed. This eliminates the need for users to seal the drain outlet with a plug or cover, preventing the loss of sealing components and avoiding the unsightly issue of tying sealing components to the countertop water purifier with ropes.

[0012] For example, the valve assembly includes one or more of the following: a second one-way valve, disposed on the concentrate return pipeline, configured to allow unidirectional flow in a direction opposite to a predetermined direction; a second concentrate solenoid valve, disposed on the concentrate return pipeline; and a switching valve, comprising a valve inlet, a first valve outlet, and a second valve outlet, the valve inlet being connected to the concentrate outlet of the water purification assembly, the first valve outlet being connected to the inlet of the concentrate return pipeline, and the second valve outlet being connected to the inlet of the concentrate discharge pipeline. By controlling the switching valve, the concentrate can be discharged to the drain outlet or the concentrate can be returned to the raw water tank, eliminating the need for a sealing component or the first concentrate solenoid valve.

[0013] For example, the countertop water purifier further includes: a tap water inlet for receiving tap water; an inlet control valve, the inlet of which is connected to the tap water inlet via an inlet pipe, and the outlet of which is connected to the water tank outlet; a water level detection component for detecting the water level in the raw water tank; and a controller for controlling the inlet control valve to open and close when the water level is higher than or equal to the upper limit of the water level. Due to the presence of the raw water tank, in the event of a water outage, the countertop water purifier can still provide the user with the required purified water for a period of time using the raw water stored in the tank. By detecting the water level, the controller can control the inlet control valve to replenish raw water in a timely manner when the water level in the raw water tank is too low, and control the inlet control valve to close when the water level indicator reaches the upper limit of the water level to prevent water from overflowing from the raw water tank.

[0014] For example, the countertop water purifier also includes a supply information acquisition component. This component acquires supply information indicating whether tap water is being supplied from the tap. The controller is further configured to: determine whether tap water is being supplied from the tap based on the supply information when the water level is below or equal to the lower limit and before the inlet control valve is opened; if so, control the inlet control valve to open. When the countertop water purifier is not connected to tap water, opening the inlet control valve will not replenish the raw water tank. Furthermore, the raw water in the tank may leak from the tap. Therefore, when tap water is not being supplied, the inlet control valve can be closed. In this case, the user needs to manually replenish the raw water tank. Conversely, opening the inlet control valve will replenish the raw water tank.

[0015] For example, the supply information acquisition component includes: a pressure detection component, which is installed on the water inlet pipe and is used to detect the pressure information of the water inlet pipe. The supply information includes the pressure information, and the controller determines that tap water is supplied from the tap when the pressure is greater than a pressure threshold based on the pressure information; or an input component, which is used to receive switching information from the user when switching between manual water replenishment mode and automatic water replenishment mode. The supply information includes the switching information, and the controller determines that it is in automatic water replenishment mode based on the switching information and determines that tap water is supplied from the tap. Tap water can be added to the raw water tank by opening the water inlet control valve. When the water level is higher than or equal to the upper limit of the water level, the water inlet control valve is closed to prevent water from overflowing from the raw water tank.

[0016] For example, the countertop water purifier also includes a prompting device. The controller is further configured to determine, based on supply information, whether tap water is being supplied from the tap when the water level is below or equal to the lower limit and before the inlet control valve is opened. If yes, the controller issues a first prompt message, which includes information prompting the user to empty the raw water tank. If no, the controller issues a second prompt message, which includes information prompting the user to empty and then refill the raw water tank. This provides clear prompts to the user and improves the user experience.

[0017] For example, the countertop water purifier also includes a positioning detection component, which detects whether the raw water tank is installed in a predetermined position and generates installation information. The controller is also used to determine, based on the installation information, that the raw water tank has been installed in the predetermined position when the water level is below or equal to the lower water level limit and before the inlet control valve is opened. Tap water is first supplied to the raw water tank through the inlet pipe and then provided to the raw water inlet. Controlling the opening of the inlet control valve based on the installation information can prevent tap water from leaking outside the countertop water purifier if the inlet control valve is opened when the raw water tank is not installed in place.

[0018] For example, the controller is also configured to, based on installation information, determine whether the raw water tank has been moved from a predetermined position for a predetermined time period before being installed in the predetermined position when the water level is below or equal to the lower limit and before the inlet control valve is opened. If so, the controller controls the inlet control valve to open; otherwise, it controls the inlet control valve to close. Whether the user has emptied the raw water tank can be determined by detecting whether the raw water tank has been removed. It can also be confirmed that the user has emptied the raw water tank when the installation information determines that the raw water tank has been moved from the predetermined position for a time period greater than or equal to a preset time period. This can avoid most erroneous operations.

[0019] For example, the countertop water purifier further includes: a tap water inlet for receiving tap water, with the inlet of a booster pump connected to the tap water inlet, enabling the countertop water purifier to have a first water supply mode where tap water supplies water to the water purification components; and a first one-way valve, with the water tank outlet connected to the inlet of the first one-way valve and the outlet of the first one-way valve connected to the inlet of the booster pump, enabling the countertop water purifier to also have a second water supply mode where a raw water tank supplies water to the water purification components. When the countertop water purifier is connected to tap water, the idle raw water tank can be filled with concentrated water until it is full, thus reducing the frequency of emptying the water tank by the user. The raw water tank is removable, which makes it convenient for the user to pour out the concentrated water and, in the second water supply mode, convenient for the user to fill the raw water tank with raw water.

[0020] For example, the countertop water purifier also includes: a water level detection component for detecting the water level information in the raw water tank; a prompting component; and a controller for controlling the prompting component to issue a prompting message based on the water level information. The prompting component can promptly remind the user to process the water in the raw water tank to ensure a sufficient water supply for the countertop water purifier or to prevent water from overflowing from the raw water tank.

[0021] For example, the prompt information includes a first prompt and a second prompt. The first prompt includes information to remind the user to empty the raw water tank, and the second prompt includes information to remind the user to empty and then refill the raw water tank. The controller is further configured to: when the countertop water purifier is in the first water supply mode, and the water level information indicates that the water level in the raw water tank is higher than or equal to the upper limit, control the prompt component to issue the first prompt; and when the countertop water purifier is in the second water supply mode, and the water level information indicates that the water level in the raw water tank is lower than or equal to the lower limit, control the prompt component to issue the second prompt. Users not only need to empty the raw water tank when there is water in it, but also need to manually refill the raw water tank. In short, this provides clear prompts to the user and improves the user experience.

[0022] For example, the countertop water purifier also includes a mode information acquisition component. This component acquires the current water supply mode of the countertop water purifier and generates mode information. The controller determines the current water supply mode of the countertop water purifier based on the mode information. This logic is simple and reliable, eliminating the need for sensor detection.

[0023] Exemplarily, the mode information acquisition component includes: an input component for receiving a user's mode selection operation to choose the water supply mode of the countertop water purifier and generating mode information; or a pressure detector, which is installed at the water inlet or on a pipe directly connected to the water inlet, for detecting the pressure of the water inlet and generating pressure information. The mode information includes the pressure information. The controller is further configured to determine, based on the pressure information, that the countertop water purifier is in a first water supply mode when the pressure is greater than a pressure threshold, and to determine that the countertop water purifier is in a second water supply mode when the pressure is less than or equal to the pressure threshold. Using a pressure detector can prevent users from incorrectly setting the mode when installing the countertop water purifier, which could lead to automatic water supply failure or leakage of water from the tap from the raw water tank, making it more convenient to use.

[0024] For example, a countertop water purifier includes: an input component, which is further configured to receive a user's water dispensing operation and generate water dispensing information; an inlet control valve; and a controller, wherein: the inlet of the inlet control valve is connected to a tap water outlet, and the outlet of the inlet control valve is connected in parallel with the outlet of a first one-way valve to a raw water inlet; the controller is configured to control the inlet control valve to open and close based on the water dispensing information in a first water supply mode, and to control the inlet control valve to close in a second water supply mode; or the inlet of the inlet control valve is connected to both a tap water outlet and the outlet of the first one-way valve, and the outlet of the inlet control valve is connected to the raw water inlet, and the controller is configured to control the inlet control valve to open and close based on the water dispensing information. Thus, when the inlet control valve is closed, tap water will not reach the raw water inlet, and when the tap water outlet is not connected to a tap water outlet and is open, the raw water supplied by the raw water tank will not reach the tap water outlet from the closed inlet control valve. The controller can control the inlet control valve to open and close based on the water dispensing information.

[0025] For example, the countertop water purifier also includes a water level detection component for detecting the water level information in the raw water tank. The controller is also used to control the inlet control valve to close when the water level information indicates that the water level in the raw water tank is higher than or equal to the upper limit of the water level. By detecting the water level, the controller can control the inlet control valve to replenish raw water in a timely manner when the water level in the raw water tank is too low, and control the inlet control valve to close when the water level indicator reaches the upper limit of the water level to prevent water from overflowing from the raw water tank.

[0026] For example, the controller is further configured to: when it is determined that the countertop water purifier has entered the first water supply mode, and when the water level information indicates that the water level in the raw water tank is higher than or equal to the upper limit of the water level, the control prompt component issues a third prompt message to prompt the user to empty the water tank; or when it is determined that the countertop water purifier has entered the first water supply mode, the control prompt component issues a third prompt message to prompt the user to empty the water tank. In this case, emptying the raw water tank can also provide storage space for concentrated water. The user can be prompted to empty the raw water tank regardless of whether there is water in it. Emptying the raw water tank can prevent the water in the raw water tank from storing for a long time and causing bacterial growth.

[0027] For example, the countertop water purifier includes a third one-way valve, the inlet of which is connected to a tap water outlet, and the outlet of which is connected to the inlet of a booster pump; and / or the countertop water purifier also includes a second sealing element for opening or closing the tap water outlet, the second sealing element being used to close the tap water outlet when the countertop water purifier is operating only in a second water supply mode; and / or the height of the tap water outlet is not lower than the top of the raw water tank. By providing the third one-way valve, even if the height of the tap water outlet is lower than the liquid level in the raw water tank, the raw water in the raw water tank will not flow out from the tap water outlet. In other embodiments, the height of the tap water outlet is not lower than the top of the raw water tank. Thus, even if the tap water outlet may not be sealed, the raw water in the raw water tank will not flow out from the tap water outlet.

[0028] For example, the flow control component includes: a zero-pressure valve and a flow control pump arranged in series; and / or a flow regulating valve. With common flow control pumps, the presence of pressure at the inlet may prevent them from pumping an accurate flow rate. The zero-pressure valve eliminates the pressure of the purified water at the outlet, allowing the flow control pump to accurately pump purified water. The flow regulating valve similarly controls the output flow rate of purified water and can also be used with a flow meter. This enables the output flow rate of purified water to be precisely controlled. In the case of a countertop water purifier that includes a heating element, by limiting the water flow when the user takes water, a higher temperature of hot water can be provided to the user. Thus, hot water at the user's desired water temperature can be accurately provided.

[0029] A series of simplified concepts are introduced in the description of the invention, which will be further explained in detail in the detailed description section. This 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.

[0030] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The following figures are included as part of this invention for understanding its principles. The figures illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the figures,

[0032] Figures 1-8 The following are water circuit diagrams of countertop water purifiers according to different exemplary embodiments of the present invention.

[0033] The above figures include the following reference numerals:

[0034] 10. Water Inlet; 20. Water Outlet; 30. Purified Water Pipeline; 31. Zero-Pressure Valve; 32. Flow Control Pump; 40. Return Pipeline; 41. Return Valve; 60. Heating Component; 70. Drain; 80. Tap Water Inlet; 90. First Check Valve; 100. Raw Water Tank; 101. Water Tank Outlet; 102. Concentrate Inlet; 103. Lower Water Level Limit; 104. Upper Water Level Limit; 210. Purified Water Component; 211. Raw Water Tank 212 Water inlet; 213 Purified water outlet; 220 Concentrate outlet; 230 Booster pump; 240 Concentrate proportioning valve; 250 Pre-filter; 250 First solenoid valve; 300 Concentrate discharge pipeline; 310 First concentrate solenoid valve; 400 Concentrate return pipeline; 410 Second check valve; 420 Second concentrate solenoid valve; 500 Inlet control valve; 600 Inlet pipeline; 601 Third check valve. Detailed Implementation

[0035] In the following description, numerous details are provided to enable a thorough understanding of the invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the invention, and that the invention can be practiced without one or more of these details. Furthermore, to avoid obscuring the invention, some technical features well-known in the art have not been described in detail.

[0036] To fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below; however, in addition to these detailed descriptions, the present invention may have other embodiments.

[0037] Embodiments of the present invention provide a water purifier. The water purifier according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings. As described above, the countertop water purifier may have a water inlet for dispensing purified water and a raw water tank, the raw water tank including a water tank outlet. Figure 1As shown, the water inlet 10 can be formed by a water outlet 20 or a faucet, etc., installed on the water purifier. Exemplarily, but not limitingly, the water tank outlet 101 can be located at the bottom of the raw water tank 100, allowing most of the raw water in the raw water tank 100 to flow out through the water tank outlet 101. In an embodiment not shown, the water tank outlet can be located at the top of the raw water tank, allowing raw water to be drawn from the raw water tank via a pipe inserted from the water tank outlet into the raw water tank. The raw water tank 100 may also include a water inlet (not shown), through which the user can replenish raw water to the raw water tank 100. The raw water may include, but is not limited to, bottled water, well water, or tap water. The countertop water purifier may also include a water purification assembly 210 and a booster pump 220. The water purification component 210 may include a raw water inlet 211 and a purified water outlet 212. The inlet of the booster pump 220 may be connected to the water tank outlet 101, and the outlet of the booster pump 220 may be connected to the raw water inlet 211. Since the raw water in the raw water tank 100 has almost no pressure, the booster pump 220 can draw raw water from the raw water tank 100 and pressurize it so that the pressure of the raw water reaches the rated working pressure of the water purification component 210.

[0038] Continue to refer to Figure 1 The water purification component 210 may include filter elements such as activated carbon filter elements, PP filter elements, ceramic filter elements, resin filter elements, ultrafiltration filter elements, nanofiltration filter elements, and reverse osmosis filter elements, as well as composite filter elements composed of one or more of these filter elements. For nanofiltration and reverse osmosis filter elements, the pressure provided by the booster pump 220 is sufficient to meet their operational requirements. Since nanofiltration and reverse osmosis filter elements also produce a certain proportion of concentrated water during operation, the water purification component 210, which includes one or both of these elements, is also provided with a concentrated water outlet 213. The concentrated water outlet 213 can be connected to the concentrated water outlet 213 of the water purification component 210 via a concentrated water proportioning valve 230. When the concentrated water proportioning valve 230 is closed, it maintains the pressure required for the normal operation of the water purification component 210. When the concentrated water proportioning valve 230 is open, raw water can quickly pass through the water purification component 210 and the concentrated water proportioning valve 230, thereby flushing the water purification component 210. Therefore, the countertop water purifier may also include a concentrated water discharge component connected to the concentrated water outlet 213. The purified water outlet 212 can be connected to the water inlet 10 via the purified water pipe 30. The purified water component 210 can filter the raw water to remove harmful bacteria, heavy metals and other impurities, so as to provide users with high-quality purified water through the water inlet 10.

[0039] The water purification unit 210 may include a reverse osmosis filter cartridge. The pore size of the reverse osmosis filter cartridge is five millionths of a human hair (0.1 nanometers), which is 10 times larger than bacteria and viruses that are generally invisible to the naked eye. Therefore, only water molecules and some beneficial mineral ions can pass through, while other impurities and heavy metals are discharged through the concentrated water outlet, providing users with high-quality purified water. For ease of description, the following detailed description uses the water purification unit 210 using a reverse osmosis filter cartridge as an example.

[0040] As described in the background section, the installation of a water tank can cause several problems with countertop water purifiers. The inventors understand and recognize that, with the gradual maturation of water purification technology, the price of high-flow-rate reverse osmosis filter cartridges has gradually decreased to a level acceptable to users. Using high-flow-rate reverse osmosis filter cartridges can replace low-flow-rate ones, thereby increasing the amount of purified water produced per unit time. Based on this, a sufficient amount of purified water can be provided to users without the need for a water tank. The countertop water purifier may include a flow control component. The inlet of the flow control component can be connected to the purified water outlet 212, and the outlet can be connected to the water intake 10. The flow control component is used to limit the water flow rate output from the water intake 10. In some embodiments, the flow control component may include an adjustable faucet or valve. The faucet and valve may be electrically operated or manually operated. Taking a faucet as an example, the user can control the water flow rate by operating the faucet, thereby preventing excessive water flow and splashing. In this configuration, the countertop water purifier may include a return pipe 40. The inlet of the return pipe 40 can be connected to the inlet of the flow control component, and the outlet of the return pipe 40 can be connected to the inlet of the booster pump 220. Since the purified water at the outlet 212 still has significant pressure, excess purified water will accumulate pressure in the pipe when the flow control component limits the water flow, increasing the load on the water purification component 210 and the booster pump 220, thus affecting their service life. The return pipe 40 may be equipped with a return valve 41 that opens under certain pressure. When the pressure at the inlet of the flow control component exceeds the opening pressure of the return valve 41, excess purified water can be returned to the inlet of the booster pump 220 to participate in water purification again. This reduces the pressure in the pipe and extends the service life of the countertop water purifier. Countertop water purifiers can also be equipped with components such as high-pressure switches to work in conjunction with manual faucets. When the user takes water, the water pressure at the inlet decreases, triggering the high-pressure switch to activate the booster pump, enabling the water purification components to produce water. When the user closes the faucet, the pressure at the inlet increases, triggering the high-pressure switch to shut off the booster pump.

[0041] Therefore, by employing a high-flow-rate water purification component 210, and incorporating a flow control component and a return pipe 40, users can adjust the purified water flow rate according to their needs. The return pipe 40 reduces pipe pressure during water dispensing, extending the lifespan of the countertop water purifier. Using the high-flow-rate water purification component 210, the countertop water purifier eliminates the need for a water tank, allowing for fresh water to be dispensed on demand. The tankless countertop water purifier is also more compact and easier to maintain. The booster pump 220 does not operate when the user is not dispensing water, only generating noise when the user is dispensing, thus improving the user experience.

[0042] In some embodiments, the countertop water purifier may further include a pre-filter 240 and a first solenoid valve 250. The pre-filter 240 may include filter elements such as PP cotton and activated carbon, used for preliminary filtration of raw water to remove impurities such as sediment and rust, thereby extending the service life of the water purification component 210. The first solenoid valve 250 can completely shut off the flow of raw water.

[0043] Exemplarily, the raw water tank can be configured to be detachable. In some embodiments where the raw water tank is detachable, the raw water tank 100 can also be configured to be filled with raw water in the detached state. The water inlet of the raw water tank 100 can be the same opening as the water tank outlet 101, thereby reducing the number of openings on the raw water tank 100 and making the structure simpler. Of course, the water inlet and the water tank outlet 101 can also be different openings. Exemplarily and not limitingly, the water inlet and the water tank outlet 101 can both be located at the bottom of the raw water tank 100, and the water inlet can have a large opening and a cover, thereby facilitating the user to fill in raw water and preventing raw water from spilling. Optionally, the water inlet can be located at the bottom of the raw water tank 100. This makes the upper part of the raw water tank 100 simpler and improves the user experience. The detachable raw water tank 100 makes it easy for the user to move it to the location of the water source, such as the location of the tap. For ease of movement, the upper part of the raw water tank 100 can also be provided with a handle or other structure. With a handle at the top, placing the water inlet at the bottom of the raw water tank 100 avoids the handle obstructing the filling of raw water. The raw water tank 100 can be installed into the countertop water purifier after being filled with sufficient raw water. When the raw water tank 100 is installed, the water tank outlet 101 connects to the raw water inlet 211, thereby supplying raw water to the water purification component 210. The water tank outlet 101 may be equipped with a stop valve (not shown). When the raw water tank 100 is disassembled, raw water cannot flow out through the stop valve. However, when the raw water tank 100 is installed, raw water can reach the inlet of the booster pump 220 connected to the water tank outlet 101 through the stop valve.

[0044] Continue to refer to Figure 1 and Figure 2When the raw water tank 100 is detachable, it may further include a concentrated water inlet 102. Correspondingly, the concentrated water discharge assembly may include a concentrated water return pipe 400, the inlet of which may be connected to a concentrated water outlet 213, and the outlet of which may be connected to the concentrated water inlet 102. Preferably, the concentrated water return pipe 400 can be connected while the raw water tank 100 is in the installed state. In some application scenarios, it may be inconvenient to discharge concentrated water to the outside of the countertop water purifier, for example, if the countertop water purifier is placed in a bedroom or office. In this case, the concentrated water can be discharged back to the raw water tank 100 through the concentrated water return pipe 400. In some specific embodiments, a partition (not shown) may be provided inside the raw water tank 100. The partition can partially separate the concentrated water inlet 102 and the water outlet 101 of the tank, thereby reducing the proportion of concentrated water mixed with raw water or preventing the concentrated water from mixing with the raw water. The removable raw water tank 100 makes it easy for users to remove the concentrated water returned through the concentrated water return pipeline 400.

[0045] like Figure 2 As shown, since the water in the concentrated water return pipe 400 also flows back to the raw water tank 100, in some embodiments, the return pipe 40 can be connected to the concentrated water return pipe 400, so that the returned purified water and concentrated water return to the raw water tank 100 together. This makes the layout of the internal piping of the countertop water purifier more convenient. In the embodiments where a partition is provided in the raw water tank 100 to separate the water tank inlet 101 and the water tank concentrated water inlet 102, part of the returned purified water may not be able to participate in water production again and will be wasted. In the embodiments where no partition is provided in the raw water tank 100, there is little difference between connecting the return pipe 40 to the inlet of the booster pump 220 and connecting the return pipe 40 to the concentrated water return pipe 400.

[0046] For example, the countertop water purifier may also include a drain outlet 70 connected to the outside, such as... Figure 3 As shown, the concentrated water discharge assembly may include a concentrated water discharge pipe 300, with its inlet connected to a concentrated water outlet 213 and its outlet connected to a drain outlet 70. Specifically, for example, the drain outlet 70 may be connected to a drain pipe, which may be connected to a sewer or a container for collecting the concentrated water. Users can then use the concentrated water in the container for various purposes as needed. This solution is particularly suitable for countertop water purifiers where drainage systems are included.

[0047] In the above technical solution, users can store or discard the concentrated water discharged through the drain outlet 70 as needed, thus increasing the diversity of user choices. Users can reuse the collected concentrated water to save water. While supplying water from the raw water tank 100, directly discharging the concentrated water through the drain outlet 70, compared to returning the concentrated water to the raw water tank 100, can maintain the water quality in the raw water tank 100 and extend the service life of the water purification component 210 to some extent. After the first use of the countertop water purifier or after replacing the water purification component 210, the concentrated water proportioning valve 230 can be opened to flush the water purification component 210 to clean the protective fluid. After the water purification component 210 has been used for a period of time, the concentrated water proportioning valve 230 can also be opened to flush the water purification component 210, thereby removing dirt from the surface of the water purification component 210 and extending its service life. During the rinsing process, the countertop water purifier with a drain outlet 70 can quickly discharge the contaminated water after rinsing from the drain outlet 70 instead of flowing back to the original water tank 100, which can ensure that the water used to rinse the water purification component 210 is always relatively clean and can improve the rinsing efficiency of the water purification component 210.

[0048] It should be noted that, in the embodiment where concentrated water is discharged from drain outlet 70, since the concentrated water generated during the water purification process of water purification component 210 does not need to flow back to raw water tank 100, the lower limit of water level 103 can be set lower, even to the water level at which raw water tank 100 is emptied. The concentrated water outlet 213 of water purification component 210 is only connected to the concentrated water inlet 102 of raw water tank 100. Figure 1 and Figure 2 In the case of a water purification unit 210, since the concentrated water produced during the water purification process may flow back to the raw water tank 100, the lower limit of the water level 103 can be set higher, for example, to the level of concentrated water produced after all the raw water in the full raw water tank 100 has been consumed. Figure 3 In the embodiment shown where all the concentrated water is discharged through the concentrated water discharge pipe 300, since there is no concentrated water in the raw water tank 100, there is no need to remove the raw water tank 100 to pour out the concentrated water. Therefore, the raw water tank 100 can be constructed as non-removable.

[0049] like Figure 4As illustrated, exemplarily, when the countertop water purifier includes a drain outlet 70 connecting to the outside and the concentrated water discharge assembly includes a concentrated water return pipe 400, the countertop water purifier may also include a valve assembly. The valve assembly is used to control the concentrated water return pipe 400 to be shut off at least along a predetermined direction when the concentrated water discharge pipe 300 is open. The predetermined direction is from the concentrated water inlet 102 of the water tank to the concentrated water outlet 213 of the water purification assembly 210. It is easy to understand that, specifically, when the concentrated water discharge pipe 300 is open, the concentrated water return pipe 400 can be divided into two cases: 1) unidirectionally open in the direction opposite to the predetermined direction, concentrated water can enter the raw water tank 100 along the concentrated water return pipe 400; 2) the concentrated water return pipe 400 is shut off in both directions. If the valve assembly is not installed, the raw water in the raw water tank 100 may enter the concentrated water discharge pipe 300 through the concentrated water return pipe 400 and flow out from the drain outlet 70 when the concentrated water discharge pipe 300 is open.

[0050] In embodiments of the countertop water purifier that include both a concentrated water return pipe 400 and a drain outlet 70 and a concentrated water discharge pipe 300, the concentrated water discharge pipe 300 can be exemplarily shut off. Normally, when the concentrated water discharge pipe 300 is open, the concentrated water generates almost no pressure in the concentrated water return pipe 400. Therefore, almost all the concentrated water flows out from the drain outlet 70 and does not enter the raw water tank 100. When the concentrated water discharge pipe 300 is shut off, no concentrated water flows out from the drain outlet 70, and the pressure of the concentrated water can at least overcome the pressure of the raw water in the raw water tank 100 to enter the raw water tank 100. If the countertop water purifier is equipped with a valve assembly, the concentrated water can overcome the resistance of the valve assembly and the pressure of the raw water in the raw water tank 100 to enter the raw water tank 100. In summary, by shutting off the concentrated water discharge pipe 300, the countertop water purifier can be switched from a mode where concentrated water is discharged through the drain outlet 70 to a mode where concentrated water returns to the raw water tank 100, making it suitable for various application scenarios. Furthermore, this countertop water purifier can be standardized, allowing users to choose the drainage mode according to their usage environment.

[0051] As described above, by shutting off the concentrated water discharge line 300, the concentrated water produced during the water purification process of the water purification component 210 can flow back to the raw water tank 100. Exemplarily, the countertop water purifier may also include a plug (not shown) for opening or closing the drain outlet 70, with the concentrated water discharge line 300 shut off when the plug closes the drain outlet 70. The plug may include a stopper or cap that can be held in place at the drain outlet 70 by threads or friction, thereby preventing concentrated water from flowing out of the drain outlet 70. In this case, the valve assembly can be configured to open automatically under water pressure, thus enabling switching of the concentrated water discharge method of the countertop water purifier at a low cost without control. In embodiments not shown, the plug may also include a mechanical valve or faucet structure located at the drain outlet 70.

[0052] For example, such as Figure 6 As shown, the countertop water purifier may also include a first concentrated water solenoid valve 310 installed on the concentrated water discharge pipe 300, which can be shut off when the first concentrated water solenoid valve 310 is closed. By installing the first concentrated water solenoid valve 310, the countertop water purifier can respond to user operation by preventing concentrated water from flowing out of the drain outlet 70 and allowing the concentrated water to flow back to the raw water tank 100. This eliminates the need for users to seal the drain outlet 70 with a plug or cover, preventing the loss of sealing components and avoiding the unsightly issue of tying sealing components to the countertop water purifier with ropes. When the countertop water purifier is equipped with the first concentrated water solenoid valve 310, the valve assembly can be configured to open automatically under water pressure, or to be controlled to open and close in the opposite direction to the opening and closing of the first concentrated water solenoid valve 310.

[0053] The aforementioned valve assembly may include one or more of the following. Figure 4 and Figure 5 In the exemplary embodiment shown, the valve assembly may include a second check valve 410. The second check valve 410 may be disposed on the concentrate return line 400, and is configured to be unidirectionally open in a direction opposite to the aforementioned predetermined direction. That is, the second check valve 410 is unidirectionally open in the direction from the concentrate outlet 213 of the water purification assembly 210 to the concentrate inlet 102 of the water tank. The second check valve 410 can automatically open under water pressure without control, and can prevent raw water in the raw water tank 100 from leaking from the drain outlet 70 when the concentrate discharge line 300 is open. When the valve assembly includes the second check valve 410, the concentrate discharge line 300 can be shut off by a plug or by the first concentrate solenoid valve 310.

[0054] Taking the second check valve 410 as an example of a diaphragm-type check valve, when there is no water in the raw water tank 100, the concentrated water in the concentrated water discharge pipe 300 can pass through the second check valve 410 with almost no pressure. When there is water in the raw water tank 100, it can pass through with very little pressure, only needing to overcome the pressure of the water in the raw water tank 100. Scale may accumulate in the concentrated water discharge pipe 300 during long-term use, causing a further increase in pressure in the portion of the concentrated water discharge pipe 300 and the concentrated water return pipe 400 directly connected to the concentrated water discharge pipe 300 during the concentrated water discharge process. Therefore, some of the concentrated water may be discharged from the drain port 70 through the concentrated water discharge pipe 300, while another portion returns to the raw water tank 100 under pressure. For example, the second check valve 410 can be configured to have a large opening pressure; only when the drain port 70 is mostly or even completely closed can the concentrated water pressure cause the second check valve 410 to open. With the concentrate discharge pipeline 300 normally open, the second check valve 410 effectively shuts off the concentrate return pipeline 400 from both directions, preventing the concentrate from entering the raw water tank 100 and allowing it to be discharged only through the drain outlet 70. This eliminates the need for the user to empty the concentrate from the raw water tank 100.

[0055] exist Figure 6 In the exemplary embodiment shown, the valve assembly may include a second concentrated water solenoid valve 420. The second concentrated water solenoid valve 420 may be installed on the concentrated water return line 400. The second concentrated water solenoid valve 420 can be closed when the concentrated water discharge line 300 is open, thereby preventing raw water from the raw water tank 100 from leaking through the concentrated water return line 400. The second concentrated water solenoid valve 420 can also be opened when the concentrated water discharge line 300 is closed, allowing concentrated water to enter the raw water tank 100 through the concentrated water return line 400. In this case, the concentrated water discharge line 300 is preferably closed using a first concentrated water solenoid valve 310, and the first concentrated water solenoid valve 310 and the second concentrated water solenoid valve 420 do not simultaneously open or close. Of course, this application does not exclude embodiments where the opening and closing of the second concentrated water solenoid valve 420 is controlled by detecting the water pressure in the line or by adjusting the blockage of the drain outlet 70.

[0056] In yet another exemplary embodiment, the valve assembly may include a switching valve (not shown). The switching valve may include a valve inlet, a first valve outlet, and a second valve outlet. The valve inlet may be connected to the concentrate outlet 213 of the water purification assembly 210, the first valve outlet may be connected to the inlet of the concentrate discharge pipeline 300, and the second valve outlet may be connected to the inlet of the concentrate return pipeline 400. The switching valve allows the valve inlet to be connected to either the first valve outlet or the second valve outlet. By controlling the switching valve, the concentrate can be discharged to the drain outlet 70 or the concentrate can be returned to the raw water tank 100, in which case there is no need to install a sealing component or the first concentrate solenoid valve 310. Of course, this application does not exclude embodiments that combine one or more of the above-described types of valve assemblies.

[0057] By way of example, a countertop water purifier may also include a tap water inlet for receiving tap water. (Refer to the reference...) Figures 5-8 By way of example, and not limitation, the water inlet 80 can be directly connected to a tap water pipe, or connected to a tap water faucet via a faucet adapter and piping. The countertop water purifier may also include a water level detection component for detecting the water level in the raw water tank 100. By way of example, the water level detection component may include one or more of any suitable sensors, such as an infrared water level gauge, a float water level gauge, or an ultrasonic water level gauge. The water level detection component is used to detect the water level in the raw water tank 100. The countertop water purifier may also include an inlet control valve 500 and a controller. Figure 5 In the illustrated embodiment, the inlet of the inlet control valve 500 is connected to the tap water inlet 80 via the inlet pipe 600, and the outlet of the inlet control valve 500 is connected to the water tank outlet 101. In other words, tap water first replenishes the raw water tank 100, and then, after being pressurized by the booster pump 220, it is supplied to the water purification component 210. Alternatively, the water tank outlet 101 may include a first water tank outlet and a second water tank outlet. The first water tank outlet may be connected to the inlet of the booster pump 220, and the second water tank outlet may receive raw water.

[0058] The controller is used to open the inlet control valve 500 when the water level in the raw water tank 100 is lower than or equal to the lower limit 103, and to close the inlet control valve 500 when the water level in the raw water tank 100 is higher than or equal to the upper limit 104. The controller can be constructed using electronic components such as timers, comparators, registers, and digital logic circuits, or implemented using processor chips such as microcontrollers, microprocessors, programmable logic controllers (PLCs), digital signal processors (DSPs), field-programmable gate arrays (FPGAs), programmable logic arrays (PLAs), and application-specific integrated circuits (ASICs) and their peripheral circuits. By detecting the water level, the controller can promptly replenish raw water by controlling the inlet control valve 500 when the water level in the raw water tank 100 is too low, and close the inlet control valve 500 when the water level indicator reaches the upper limit 104 to prevent water from overflowing from the raw water tank 100.

[0059] For example, the countertop water purifier may also include a supply information acquisition component, which acquires supply information regarding whether tap water is supplied through the water inlet 80. The controller is further configured to determine whether tap water is supplied through the water inlet 80 based on the supply information when the water level is below or equal to the lower limit and before the inlet control valve 500 is opened. If so, the controller controls the inlet control valve 500 to open. It is easy to understand that opening the inlet control valve 500 will not replenish the raw water tank 100 when the countertop water purifier is not connected to tap water. Furthermore, the raw water in the raw water tank 100 may leak from the water inlet 80. Therefore, when tap water is not supplied through the water inlet 80, the inlet control valve 500 can be closed. In this case, the user needs to manually replenish the raw water tank 100. Conversely, opening the inlet control valve 500 can replenish the raw water tank 100.

[0060] For example, the supply information acquisition component may include a pressure detection component (not shown), which may be disposed on the inlet pipe 600 and located upstream of the inlet control valve 500, for detecting the pressure within the inlet pipe 600. The pressure detection component can generate pressure information based on the pressure within the inlet pipe 600. The pressure detection component may include suitable components such as analog pressure sensors or digital pressure sensors. Specifically, for example, the pressure detection component may include a pressure switch that connects the circuit when the water pressure in the inlet pipe 600 is greater than a certain pressure threshold, and disconnects the circuit when the water pressure in the inlet pipe 600 is less than the aforementioned pressure threshold. The supply information may include pressure information, and the controller determines that tap water is supplied from the water inlet when the pressure is greater than the pressure threshold based on the pressure information. It is easy to understand that since tap water has pressure, when the water inlet 80 is not connected to a tap water source, or the connected tap water source cannot provide tap water, the pressure indicated by the pressure information is much lower than the tap water pressure. Opening the inlet control valve 500 at this point is pointless, and the raw water in the raw water tank 100 may leak from the tap water inlet 80. Conversely, when the pressure is higher than or equal to the pressure threshold, it can be considered that a reliable tap water source has been connected. Tap water can be added to the raw water tank 100 by opening the inlet control valve 500. When the water level is higher than or equal to the upper limit 104, the inlet control valve 500 is closed to prevent water from overflowing from the raw water tank 100.

[0061] For example, when the pressure detection component is the aforementioned pressure switch, the pressure information indicating circuit connection means the pressure is higher than or equal to the pressure threshold. When the pressure detection component includes an analog or digital pressure sensor, the controller needs to compare the pressure information with a preset pressure threshold. Thus, the countertop water purifier can automatically determine whether tap water is being received at the water inlet 80 and control the inlet control valve 500 based on the water level information to achieve automatic water replenishment. Since tap water pressure may vary depending on the region and floor level, and the number of people using tap water also affects the pressure, the pressure threshold can be a numerical range. "Higher than or equal to the pressure threshold" means the current pressure is higher than or equal to the upper limit of the pressure threshold. "Lower than the pressure threshold" means the current pressure is lower than the lower limit of the pressure threshold. The pressure threshold can be set within a reasonable range to ensure normal water replenishment at this pressure while avoiding misjudgments caused by water pressure fluctuations. Optionally, the pressure threshold can also be a single numerical value.

[0062] Exemplarily, the supply information acquisition component may include an input component for receiving switching information from a user when switching between manual and automatic water replenishment modes. The input component may include a touchscreen, buttons, etc. Optionally, the input component may also include a receiver for receiving mode selection operations input by the user through a user interface on their electronic device. In summary, the input component can be used to receive switching information input by the user. The supply information may also include switching information, based on which the controller determines that it is in automatic water replenishment mode and that tap water is supplied from water inlet 80. Exemplarily, and not limitingly, the input component may be a DIP switch. Since the countertop water purifier typically does not frequently switch between manual and automatic water replenishment modes after installation, to avoid accidental activation during daily use, the DIP switch may be placed in a location that is not easily accessible during daily use. In manual water replenishment mode, since tap water inlet 80 is not connected to a tap water source, opening the inlet control valve 500 is meaningless. Therefore, the inlet control valve 500 can be closed to prevent water in the raw water tank 100 from accidentally flowing out of tap water inlet 80. In automatic water replenishment mode, the controller can open the inlet control valve 500 when the water level in the raw water tank 100 is lower than or equal to the lower limit 103, thereby replenishing the raw water in the raw water tank 100. When the water level in the raw water tank 100 is higher than or equal to the upper limit 104, the inlet control valve 500 is closed. This prevents water from overflowing from the raw water tank 100 even when it is full with tap water. By receiving user input switching information through the input component, there is no need to set up sensors to detect whether the water source has changed, making the control logic simpler and more reliable.

[0063] For example, the countertop water purifier may also include a prompting device. The prompting device may include any prompting method such as sound prompts, light prompts, SMS prompts, or APP prompts to send a prompt message to the user. The controller is also used to determine, based on supply information, whether tap water is supplied to the tap water inlet 80 when the water level is below or equal to the lower water level limit and before the inlet control valve 500 is opened. If yes, the controller can control the prompting device to issue a first prompt message, which includes information prompting the user to empty the raw water tank 100. If no, the controller can control the prompting device to issue a second prompt message, which includes information prompting the user to empty and then refill the raw water tank 100. In a specific embodiment, the prompting component may include a voice prompt component, where the first prompt message may include the audio "Please empty the raw water tank," and the second prompt message may include the audio "Please add water." This provides clear prompts to the user and improves the user experience. Of course, optionally, the first and second prompt messages may also take any other suitable form, such as text, the arrangement, color, and / or flashing style of the indicator lights, etc.

[0064] For example, the countertop water purifier may also include a positioning detection component, which detects whether the raw water tank 100 is installed in a predetermined position and generates installation information. The positioning detection component may include one or more of any suitable sensors, such as an infrared sensor, a contact sensor (e.g., a microswitch), or a proximity sensor (e.g., a Hall effect sensor). The positioning detection component can generate analog or digital signals. For example, the positioning detection component can output a positioning signal when the raw water tank 100 is in the installed state and interrupt the output of the positioning signal when the raw water tank 100 is in the disassembled state. For example, the positioning detection component can send information to the controller in real time, and the controller determines whether the raw water tank 100 is installed in place based on this information.

[0065] The controller is also used to determine, based on installation information, that the raw water tank 100 has been installed in a predetermined position when the water level is below or equal to the lower limit and before the inlet control valve 500 opens. It is understood that tap water first replenishes the raw water tank 100 through the inlet pipe and then is supplied to the raw water inlet 211. Controlling the opening of the inlet control valve 500 based on installation information can prevent tap water from leaking outside the countertop water purifier if the raw water tank 100 is not properly installed.

[0066] For example, the controller is also used to determine, based on installation information, whether the raw water tank 100 has been moved from a predetermined position for a predetermined period of time before being installed back to the predetermined position when the water level is below or equal to the lower water level limit and before the inlet control valve 500 is opened. If so, the controller can control the inlet control valve 500 to open; if not, the controller can control the inlet control valve 500 to close. As described above, when concentrated water flows back to the raw water tank 100 through the concentrated water return pipe 400, if the water level is below the lower water level limit 103, since the raw water tank 100 contains concentrated water, the user needs to manually empty the raw water tank 100 and then replenish it. Thus, by detecting whether the raw water tank 100 has been disassembled, it can be determined whether the user has performed the operation of emptying the raw water tank 100. Since the position detection component may be interfered with during operation, causing a brief fluctuation in the signal, or the countertop water purifier may be vibrated, causing a brief interruption in the installation information. To prevent the controller from opening the inlet control valve 500 and replenishing water before the user has emptied the raw water tank 100, the system can confirm that the user has emptied the raw water tank 100 when the time it takes for the raw water tank 100 to leave the predetermined position is greater than or equal to a preset time, based on the installation information. This can prevent most erroneous operations.

[0067] In the case where the countertop water purifier includes a tap water inlet 80, exemplarily, the inlet of the booster pump 220 can be connected to the tap water inlet 80, enabling the countertop water purifier to have a first water supply mode where tap water supplies water to the booster pump 220 and the water purification assembly 210. The countertop water purifier may also include a first one-way valve 90, which allows tap water to be directly supplied to the water purification assembly 210 when the tap water inlet 80 of the countertop water purifier is connected to tap water. The water tank outlet is connected to the inlet of the first one-way valve 90, and the outlet of the first one-way valve 90 is connected to the inlet of the booster pump 220, enabling the countertop water purifier to also have a second water supply mode where water is supplied from the raw water tank 100 to the booster pump 220 and the water purification assembly 210. In other words, in Figures 6-8 In the illustrated embodiment, tap water is directly supplied to the booster pump 220 and the water purification component 210, and does not enter the raw water tank 100. Specifically, in Figure 6 In the illustrated embodiment, the tap water supply can be controlled by the inlet control valve 500 and also by the first solenoid valve 250 located at the raw water inlet 211. Figure 7 In the illustrated embodiment, the inlet of the water inlet control valve 500 is connected to the tap water inlet 80 via the water inlet pipe 600, and the outlet of the water inlet control valve 500 is connected to the inlet of the booster pump 220. Figure 8 In the illustrated embodiment, the inlet control valve 500 can replace the first solenoid valve to control the flow of tap water. Municipal tap water has a certain pressure, and the booster pump 220 is typically a diaphragm pump, which does not have a shut-off function. Even when the water purification unit 210 is not operating, water will still flow through the booster pump 220 under the tap water pressure at the tap water inlet 80. Since reverse osmosis or nanofiltration filters are used, these filters have a concentrate outlet. The inlet control valve 500 prevents raw water from continuously flowing into the raw water tank 100 from the concentrate outlet 213 and even overflowing when the concentrate return pipe 400 is open, or from flowing out of the drain outlet 70 when the concentrate discharge pipe 300 is open, thus avoiding resource waste. This also prevents the filter from continuously producing water under water pressure, which would shorten its lifespan. It should be noted that the first water supply mode and the second water supply mode may simply be different names for the countertop water purifier when using different water sources. It does not mean that the countertop water purifier must actually have two switchable modes, or that the control logic or actual structure must be substantially adjusted for this purpose.

[0068] In the above technical solution, the countertop water purifier can directly supply tap water to the booster pump 220 and water purification component 210 through the tap water outlet 80 when a water supply facility is available (i.e., the first water supply mode), eliminating the need for the user to manually replenish the raw water tank 100. In the absence of a tap water connection, it supplies water to the booster pump 220 and water purification component 210 through the raw water tank 100 (i.e., the second water supply mode). Therefore, this countertop water purifier can be used in more scenarios and offers more choices regarding the source of raw water. Even when a water supply facility is available, the user can choose to have the raw water tank 100 supply water. Regardless of whether a drainage facility is available in the usage scenario, concentrated water can be discharged into the raw water tank 100. When the countertop water purifier is connected to a tap water supply, the idle raw water tank 100 can be filled with concentrated water until it is full, thus reducing the frequency of emptying the tank. The raw water tank 100 is detachable, which makes it convenient for users to pour out concentrated water and, in the second water supply mode, to fill the raw water tank 100 with raw water.

[0069] For the above embodiments, exemplarily, the countertop water purifier may further include a water level detection component, a prompting component, and a controller. The controller is used to control the prompting component to issue a prompting message based on the water level information. In the second water supply mode of the countertop water purifier using the raw water tank 100, when the water level in the raw water tank 100 is lower than or equal to the lower water level limit 103, the user needs to manually replenish the raw water in the raw water tank 100. Where concentrated water enters the raw water tank 100 through the concentrated water inlet 102, the user also needs to empty the concentrated water in the raw water tank 100 before replenishing sufficient raw water. In this case, the controller of the countertop water purifier can issue a prompting message based on the water level information when the water level in the raw water tank 100 is lower than or equal to the lower water level limit. When the countertop water purifier is in the first water supply mode and concentrated water is discharged into the raw water tank 100, the water level in the raw water tank 100 will gradually rise as the water purification component 210 produces purified water. To prevent water from overflowing from the raw water tank 100, the controller can also control the prompting component to issue a prompt message when the water level information indicates that the water level is higher than or equal to the upper limit 104. In short, the prompting component can promptly remind the user to manage the water in the raw water tank 100 to ensure a sufficient water supply for the countertop water purifier or to prevent water from overflowing from the raw water tank 100.

[0070] In one exemplary embodiment, the controller can detect the water level information in the raw water tank 100 in real time, and when the water level information indicates that the water level has reached each of a plurality of preset water levels, the control prompt component issues a prompt message to inform the user of the current water level. This allows the user to prepare for handling the raw water tank 100 based on the current water level. For example, if the user believes that a large amount of concentrated water in the raw water tank 100 would make it too heavy to empty, they can empty the raw water tank 100 in advance based on the prompt message indicating that the concentrated water has reached the upper limit of the water level. This increases the user's freedom of choice.

[0071] For example, the prompt information may include a first prompt information and a second prompt information. The first prompt information includes information to prompt the user to empty the raw water tank 100, and the second prompt information includes information to prompt the user to empty and then refill the raw water tank 100. The controller can also be used to control the prompting component to issue the first prompt information when the countertop water purifier is in the first water supply mode and the water level information indicates that the water level in the raw water tank is higher than or equal to the upper limit of the water level. As mentioned above, in the first water supply mode, the water in the raw water tank 100 is usually concentrated water. When the water level rises to the upper limit of the water level, the user needs to manually empty the raw water tank 100. And after the user empties the raw water tank 100, the countertop water purifier can automatically refill the raw water tank 100. However, when the countertop water purifier is in the second water supply mode, when the water level information indicates that the water level in the raw water tank 100 is lower than or equal to the lower limit of the water level, the control prompting component issues the second prompt information. The user not only needs to empty the concentrated water when there is water in the raw water tank 100, but also needs to manually refill the raw water tank 100. In short, this provides users with clear prompts and improves the user experience.

[0072] For example, in an embodiment where the mode information acquisition component includes an input component, the input component is used to receive a mode selection operation from the user selecting the water supply mode of the countertop water purifier and generate mode information. This logic is simple and reliable, and does not require the installation of sensor detection.

[0073] For example, in an embodiment where the mode information acquisition component includes a pressure detector, the pressure detector may also be located at the water inlet 80 or on a pipe directly connected to the water inlet 80, for detecting the pressure of the water inlet 80 and generating pressure information. The mode information includes pressure information, wherein the controller is further configured to determine, based on the pressure information, that the countertop water purifier is in a first water supply mode when the pressure is greater than a pressure threshold, and to determine that the countertop water purifier is in a second water supply mode when the pressure is less than or equal to the pressure threshold. Using a pressure detector for detection can prevent users from incorrectly setting the mode when installing the countertop water purifier, which could lead to automatic water supply failure or water leakage from the raw water tank 100 from the water inlet 80, making it more convenient to use.

[0074] For example, a countertop water purifier may include an input component, which is also used to receive a user's water dispensing operation and generate water dispensing information. The countertop water purifier also includes an inlet control valve 500 and a controller. Figure 7In the illustrated embodiment, the inlet of the inlet control valve 500 is connected to a tap water outlet, and the outlet of the inlet control valve 500 is connected in parallel with the outlet of the first one-way valve 90 to the inlet of the booster pump 220. The controller is used to control the opening and closing of the inlet control valve 500 based on water intake information in the first water supply mode, and to control the inlet control valve 500 to close in the second water supply mode. Thus, when the inlet control valve 500 is closed, tap water will not reach the raw water inlet 211, and when the tap water inlet 80 is not connected to tap water and is open, the raw water supplied by the raw water tank 100 will not reach the tap water inlet 80 from the closed inlet control valve 500. Figure 8 In the illustrated embodiment, the inlet of the water inlet control valve 500 is connected to both the tap water outlet and the outlet of the first one-way valve 90, while the outlet of the water inlet control valve 500 is connected to the inlet of the booster pump 220. When the water inlet control valve 500 is closed, purified water cannot be produced from either tap water or raw water from the raw water tank 100, and the water purification component 210 stops working. Only when the water inlet control valve 500 is open can the countertop water purifier obtain purified water from the tap water outlet 80 in the first water supply mode and from the raw water tank 100 in the second water supply mode. In this case, the controller can control the opening and closing of the water inlet control valve 500 based on the water intake information. (Return to Reference) Figure 6 In the illustrated embodiment, when the inlet control valve 500 is closed, the first solenoid valve 250 can be opened to allow raw water in the raw water tank 100 to reach the inlet of the booster pump 220; when the inlet control valve 500 is open, the first solenoid valve 250 can be opened to allow tap water to reach the inlet of the booster pump 220; when the first solenoid valve 250 is closed, both the raw water and tap water in the raw water tank 100 are cut off. In other words, based on the water intake information, the countertop water purifier can open the first solenoid valve 250 and the booster pump 220 to start water production. In the first water supply mode, the inlet control valve 500 is opened, and the tap water inlet 80 is connected to the inlet of the booster pump 220; in the second water supply mode, the inlet control valve 500 is closed, and the raw water tank 100 is connected to the inlet of the booster pump 220.

[0075] For example, the controller is also configured to, when determining that the countertop water purifier has entered the first water supply mode, issue a third prompt message to remind the user to empty the water tank when the water level information indicates that the water level in the raw water tank 100 is higher than or equal to the upper limit of the water level. As described above, if the concentrated water return pipe 400 is open, the water level in the raw water tank 100 will gradually rise. In this case, emptying the raw water tank 100 can also provide storage space for the concentrated water.

[0076] For example, the controller is also configured to issue a third prompt message to the user to empty the water tank when it is determined that the countertop water purifier has entered the first water supply mode. In other words, the user can be prompted to empty the raw water tank 100 regardless of whether there is water in the raw water tank 100. As described above, regardless of whether the water in the raw water tank 100 is raw water or concentrated water, in the first water supply mode, because the pressure of the tap water inlet 80 and the inlet pipe 600 is greater than the pressure of the water in the raw water tank 100, the first one-way valve 90 will not open, and the water in the raw water tank 100 will hardly be used again. Emptying the raw water tank 100 can prevent the water in the raw water tank 100 from being stored for a long time and breeding bacteria.

[0077] Exemplarily, the flow control component may also include a zero-pressure valve 31 and a flow control pump 32 connected in series. With common flow control pumps, pressure at the inlet may prevent them from pumping accurate flow rates. The zero-pressure valve 31 eliminates the purified water pressure at the purified water outlet 212, allowing the flow control pump 32 to accurately pump purified water. A flow meter (not shown) may also be installed downstream of the flow control pump 32 to provide feedback on the purified water flow rate, achieving closed-loop control. In some embodiments, the flow control component may include a flow regulating valve. The flow regulating valve can also control the output flow rate of purified water and can also be used in conjunction with a flow meter. This enables the output of purified water with accurate flow rates. Exemplarily, in the case where the countertop water purifier includes a heating component 60, the heating component 60 may be connected in series on the purified water pipeline 30, with the inlet of the heating component 60 connected to the outlet of the flow control component and the outlet of the heating component 60 connected to the water intake port. Since the heating power of the heating component is limited, by limiting the water flow rate when the user takes water, hot water at a higher temperature can be provided to the user. When the user desires a lower water temperature, the water flow rate can be unrestricted, and the output water temperature can be controlled by adjusting the heating power. This allows for the precise delivery of hot water at the user's desired temperature.

[0078] like Figure 8 As shown, exemplarily, the countertop water purifier may also include a third one-way valve 601, the inlet of which is connected to a tap water inlet 80, and the outlet of which is connected to the inlet of a booster pump 220. It is readily understood that since the tap water inlet 80 may be located anywhere suitable on the countertop water purifier, it may not be closed if there is no water source. The user uses a raw water tank 100 for water supply. By providing the third one-way valve 601, even if the height of the tap water inlet 80 is lower than the liquid level in the raw water tank 100, the raw water in the raw water tank 100 will not flow out from the tap water inlet 80. In other embodiments, the height of the tap water inlet 80 is not lower than the top of the raw water tank 100. Thus, even if the tap water inlet 80 may not be closed, the raw water in the raw water tank 100 will not flow out from the tap water inlet 80.

[0079] For example, the countertop water purifier may also include a second sealing element for opening or closing the water inlet 80. The second sealing element is used to close the water inlet 80 when the countertop water purifier is operating only in the second water supply mode. The countertop water purifier may be installed in a scenario where tap water cannot be connected. In this case, the water inlet 80 is ineffective, and to prevent the entry of foreign objects such as dust, it can be closed by the second sealing element. The second sealing element may have a similar shape to the first sealing element or a completely different shape. Therefore, the countertop water purifier typically no longer connects to tap water and operates only in the second water supply mode, obtaining raw water from the raw water tank 100. For some specific embodiments of the countertop water purifier, the gravity of the water in the raw water tank 100 alone is insufficient to open the first one-way valve 90. When the booster pump 220 is working, a negative pressure is generated at the raw water inlet 211, thereby opening the first one-way valve 90, allowing raw water from the raw water tank 100 to enter the raw water inlet 211. If the tap water inlet 80 is connected to the raw water inlet 211 and is not closed, air may enter, making it difficult to form negative pressure. This would cause the booster pump 220 to run dry, and the countertop water purifier would not provide purified water. Closing the tap water inlet 80 with the second sealing component maintains the negative pressure generated by the booster pump 220, ensuring that raw water from the raw water tank 100 can enter the raw water inlet 211. Therefore, the second sealing component not only prevents dust and other foreign objects from entering the countertop water purifier through the tap water inlet 80 when tap water is not being used, but also allows the countertop water purifier to operate reliably when supplied with water from the raw water tank 100.

[0080] In the embodiment where the water inlet control valve 500 can shut off the tap water inlet 80 and the raw water inlet 211, when the water inlet control valve 500 is closed, the booster pump 220 can generate negative pressure at the outlet of the first check valve 90 and draw raw water from the raw water tank 100.

[0081] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention 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 invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] The present invention 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 invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A countertop water purifier, characterized in that, has a water inlet for dispensing purified water, and is further characterized in that, The countertop water purifier includes: Raw water tank, the raw water tank including a water tank inlet; A booster pump, the inlet of which is connected to the outlet of the water tank; A water purification assembly, comprising a raw water inlet, a purified water outlet, and a concentrated water outlet, wherein the raw water inlet is connected to the outlet of the booster pump; A flow control component, wherein the inlet of the flow control component is connected to the purified water outlet, and the outlet of the flow control component is connected to the water intake. A return pipeline, wherein the inlet of the return pipeline is connected to the inlet of the flow control component, and the outlet of the return pipeline is connected to the inlet of the booster pump; and A concentrate discharge assembly, which is connected to the concentrate outlet.

2. The countertop water purifier according to claim 1, characterized in that, The countertop water purifier also includes a drain outlet connected to the outside. The concentrated water discharge component includes a concentrated water discharge pipe, the inlet of which is connected to the concentrated water outlet, and the outlet of which is connected to the drain outlet.

3. The countertop water purifier according to claim 1, characterized in that, The raw water tank is detachable, and the raw water tank also includes a concentrated water inlet. The concentrated water discharge assembly includes a concentrated water return pipeline, the inlet of which is connected to the concentrated water outlet, and the outlet of which is connected to the concentrated water inlet of the water tank.

4. The countertop water purifier according to claim 3, characterized in that, The countertop water purifier also includes a drain outlet that connects to the outside. The concentrate discharge assembly also includes: A concentrate discharge pipeline, wherein the inlet of the concentrate discharge pipeline is connected to the concentrate outlet, and the outlet of the concentrate discharge pipeline is connected to the drain outlet; and A valve assembly for controlling the concentrated water return line to be shut off at least along a predetermined direction when the concentrated water discharge line is open, the predetermined direction being the direction from the concentrated water inlet of the water tank to the concentrated water outlet of the water purification assembly.

5. The countertop water purifier according to claim 4, characterized in that, The concentrated wastewater discharge pipeline can be shut off.

6. The countertop water purifier according to claim 5, characterized in that, The tabletop water purifier also includes: A sealing element for opening or closing the drain outlet, wherein the concentrated wastewater discharge line is shut off when the sealing element closes the drain outlet; and / or A first concentrated water solenoid valve is installed on the concentrated water discharge pipeline, and the concentrated water discharge pipeline is shut off when the first concentrated water solenoid valve is closed.

7. The countertop water purifier according to claim 6, characterized in that, The valve assembly includes one or more of the following: A second one-way valve is provided on the concentrate return pipeline, and the second one-way valve is configured to allow unidirectional flow in a direction opposite to the predetermined direction. The second concentrate solenoid valve is installed on the concentrate return pipeline; as well as The switching valve includes a valve inlet, a first valve outlet, and a second valve outlet. The valve inlet is connected to the concentrate outlet of the water purification component, the first valve outlet is connected to the inlet of the concentrate return pipeline, and the second valve outlet is connected to the inlet of the concentrate discharge pipeline.

8. The countertop water purifier according to any one of claims 1, characterized in that, The tabletop water purifier also includes: A tap water inlet used to receive tap water; A water inlet control valve, wherein the water inlet of the water inlet control valve is connected to the tap water inlet through a water inlet pipe, and the water outlet of the water inlet control valve is connected to the water tank outlet; A water level detection component, wherein the water level detection component is used to detect the water level in the raw water tank; and The controller is used to control the inlet control valve to open when the water level is lower than or equal to the lower limit of the water level, and to control the inlet control valve to close when the water level is higher than or equal to the upper limit of the water level.

9. The countertop water purifier according to claim 8, characterized in that, The countertop water purifier also includes a supply information acquisition component, which is used to acquire supply information on whether the tap water outlet is supplying tap water. The controller is further configured to: determine whether tap water is supplied to the tap water inlet based on the supply information when the water level is lower than or equal to the lower limit of the water level and before the water inlet control valve is opened; if so, control the water inlet control valve to open.

10. The countertop water purifier according to claim 9, characterized in that, The supply information acquisition component includes: A pressure detection component is installed on the water inlet pipe. The pressure detection component detects the pressure information of the water inlet pipe. The supply information includes the pressure information. The controller determines that tap water is supplied to the water inlet when the pressure exceeds a pressure threshold based on the pressure information; or... An input component is used to receive switching information from a user when switching between a manual water replenishment mode and an automatic water replenishment mode. The supply information includes the switching information. Based on the switching information, the controller determines that it is in the automatic water replenishment mode and determines that the tap water inlet is supplying tap water.

11. The countertop water purifier according to claim 9, characterized in that, The countertop water purifier also includes a notification device. The controller is also used to determine, based on the supply information, whether tap water is being supplied from the water inlet when the water level is below or equal to the lower limit and before the inlet control valve is opened. If so, the prompting device is controlled to issue a first prompt message, the first prompt message including information for prompting the user to empty the raw water tank; If not, the prompting device is controlled to issue a second prompt message, which includes information to prompt the user to empty and then refill the raw water tank.

12. The countertop water purifier according to claim 8, characterized in that, The countertop water purifier also includes a positioning detection component, which is used to detect whether the raw water tank is installed in the predetermined position and generate installation information. The controller is also used to determine, based on the installation information, that the raw water tank has been installed at the predetermined position when the water level is lower than or equal to the lower limit of the water level and before the water inlet control valve is opened.

13. The countertop water purifier according to claim 12, characterized in that, The controller is also used to determine, based on the installation information, whether the raw water tank should be moved from the predetermined location for a predetermined period of time before being installed back at the predetermined location when the water level is lower than or equal to the lower water level limit and before the inlet control valve is opened. If so, then control the water inlet control valve to open; If not, then the inlet control valve is closed.

14. The countertop water purifier according to claim 1, characterized in that, The tabletop water purifier also includes: A tap water inlet for receiving tap water, the inlet of the booster pump being connected to the tap water inlet, enabling the countertop water purifier to have a first water supply mode where tap water supplies water to the water purification components; and The first one-way valve connects the water tank outlet to the inlet of the first one-way valve, and the outlet of the first one-way valve connects to the inlet of the booster pump, so that the tabletop water purifier also has a second water supply mode in which water is supplied from the raw water tank to the water purification component.

15. The countertop water purifier according to claim 14, characterized in that, The tabletop water purifier also includes: A water level detection component, wherein the water level detection component is used to detect the water level information in the raw water tank; Prompt component; and A controller is used to control the prompting component to issue a prompting message based on the water level information.

16. The countertop water purifier according to claim 15, characterized in that, The prompt information includes a first prompt information and a second prompt information. The first prompt information includes information prompting the user to empty the raw water tank, and the second prompt information includes information prompting the user to empty and then refill the raw water tank. The controller is also used for: When the countertop water purifier is in the first water supply mode, and the water level information indicates that the water level in the raw water tank is higher than or equal to the upper limit of the water level, the prompting component is controlled to issue the first prompting information; and When the countertop water purifier is in the second water supply mode, and the water level information indicates that the water level in the raw water tank is lower than or equal to the lower limit of the water level, the prompting component is controlled to issue the second prompt information.

17. The countertop water purifier according to claim 15, characterized in that, The countertop water purifier also includes a mode information acquisition component, which is used to acquire the current water supply mode of the countertop water purifier and generate mode information. The controller determines the current water supply mode of the countertop water purifier based on the mode information.

18. The countertop water purifier according to claim 17, characterized in that, The pattern information acquisition component includes: An input component, wherein the input component is used to receive a mode selection operation from the user to select the water supply mode of the countertop water purifier, and to generate the mode information; or A pressure detector is installed at the water inlet or on a pipe directly connected to the water inlet, and is used to detect the pressure of the water inlet and generate pressure information. The mode information includes the pressure information. The controller is further used to determine, based on the pressure information, that the countertop water purifier is in the first water supply mode when the pressure is greater than a pressure threshold, and to determine that the countertop water purifier is in the second water supply mode when the pressure is less than or equal to the pressure threshold.

19. The countertop water purifier according to claim 14, characterized in that, The countertop water purifier includes: An input component, which is also used to receive the user's water collection operation and generate water collection information; Inlet control valve; and Controller, wherein: The inlet of the water inlet control valve is connected to the tap water inlet, and the outlet of the water inlet control valve is connected in parallel with the outlet of the first one-way valve to the raw water inlet. The controller is used to control the opening and closing of the water inlet control valve based on the water intake information in the first water supply mode, and to control the closing of the water inlet control valve in the second water supply mode; or The inlet of the water inlet control valve is connected to the tap water outlet and the outlet of the first one-way valve, and the outlet of the water inlet control valve is connected to the raw water inlet. The controller is used to control the opening and closing of the water inlet control valve based on the water intake information.

20. The countertop water purifier according to claim 19, characterized in that, The countertop water purifier also includes a water level detection component, which is used to detect the water level information in the raw water tank. The controller is also used to control the water inlet control valve to close when the water level information indicates that the water level in the raw water tank is higher than or equal to the upper limit of the water level.

21. The countertop water purifier according to claim 15, characterized in that, The controller is also used for: When the countertop water purifier enters the first water supply mode, and the water level information indicates that the water level in the raw water tank is higher than or equal to the upper limit, the prompting component is controlled to issue a third prompt message to remind the user to empty the water tank; or When the countertop water purifier is determined to enter the first water supply mode, the prompting component is controlled to issue a third prompt message to remind the user to empty the water tank.

22. The countertop water purifier according to claim 8 or 14, characterized in that: The countertop water purifier includes a third one-way valve, the inlet of which is connected to the tap water outlet, and the outlet of which is connected to the inlet of the booster pump; and / or The countertop water purifier also has a second water supply mode where water is supplied from the raw water tank to the water purification component. The countertop water purifier further includes a second sealing element for opening or closing the tap water inlet, the second sealing element being used to close the tap water inlet when the countertop water purifier operates only in the second water supply mode; and / or The height of the tap water inlet shall not be lower than the top of the raw water tank.

23. The countertop water purifier according to claim 1, characterized in that, The flow control component includes: A zero-pressure valve and a flow control pump connected in series; and / or Flow regulating valve.

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