Table type water purifying and drinking machine

Abstract

The table type water purifying and drinking machine is provided with a water taking opening and further comprises a tap water opening, a raw water tank, a water purifying assembly, a water level detection assembly, a water supplementing control valve and a controller, the raw water tank is detachable, raw water can be injected into the raw water tank in the detached state, and the raw water tank is provided with a water tank water passing opening; the water tank water passing port is communicated to a tap water port through a water replenishing pipeline when the raw water tank is in a mounting state; the water purification assembly comprises a raw water inlet and a purified water outlet, the raw water inlet is communicated to the water tank water passing opening, and the purified water outlet is communicated to the water taking opening; the water level detection assembly is used for detecting the water level in the raw water tank; the water replenishing control valve is arranged on the water replenishing pipeline; the controller is used for controlling the water supplementing control valve to be opened when the water level in the raw water tank is lower than or equal to the lower water level limit and controlling the water supplementing control valve to be closed when the water level in the raw water tank is higher than or equal to the upper water level limit. Therefore, the requirements of various use scenes can be met, and the use experience of the user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purifying machine, in particular to a table type water purifying machine. BACKGROUND

[0002] With the development of the times, the table type water purifying machine has been recognized and purchased by most people, and the table type water purifying machine can meet the higher requirements of users for water quality.

[0003] At present, the water purifying machines on the market can be divided into embedded type, under-kitchen type, table type and the like according to different use scenes, among which the table type water purifying machine is widely welcomed due to its simple installation and more functions. The table type water purifying machine usually adopts a water tank for water supply. For the table type water purifying machine using a reverse osmosis filter core or a nanofiltration filter core, the water tank not only stores raw water for water production, but also stores concentrated water generated during water production. The user needs to manually supplement fresh raw water into the water tank during water replacement.

[0004] In some use scenes where water supply facilities such as tap water pipes exist, the current table type water purifying machine still needs the user to manually inject raw water into the water tank, which brings inconvenience to the user. SUMMARY

[0005] To at least partially solve the problems in the prior art, some embodiments of the present application provide a table type water purifier. The table type water purifier comprises: a table type water purifier having a water outlet, the table type water purifier comprising: a tap water inlet; a raw water tank, the raw water tank being detachable, the raw water tank being configured to be filled with raw water in a detached state, the raw water tank having a tank water inlet, the tank water inlet being connected to the tap water inlet through a water replenishment pipeline in a mounted state of the raw water tank; a water purification assembly, the water purification assembly comprising a raw water inlet and a purified water outlet, the raw water inlet being connected to the tank water inlet, the purified water outlet being connected to the water outlet; a water level detection assembly, the water level detection assembly being configured to detect a water level in the raw water tank; a water replenishment control valve, the water replenishment control valve being arranged on the water replenishment pipeline; and a controller, the controller being configured to control the water replenishment control valve to be opened when the water level in the raw water tank is lower than or equal to a lower water level limit, and to control the water replenishment control valve to be closed when the water level in the raw water tank is higher than or equal to an upper water level limit. In the above technical solution, the user can provide raw water to the water purification assembly through the raw water tank when the table type water purifier is applied to a use scenario in which it is inconvenient to connect to a tap water source. The user can detach the raw water tank and manually fill it with raw water. When the table type water purifier is applied to a use scenario in which it can be connected to a tap water source, the table type water purifier can automatically replenish the raw water tank to the upper water level limit when the water level in the raw water tank is lower than or equal to the lower water level limit through the water replenishment control valve, so that the user does not need to manually detach the raw water tank and manually fill it with water. In addition, in the latter use scenario, if the tap water supply is interrupted, the raw water tank can also be manually replenished with raw water; and when the tap water supply is restored, the table type water purifier can automatically switch to automatically replenish the raw water tank with raw water. Thus, the needs of various use scenarios can be met, and the user experience is improved.

[0006] Illustratively, the water purification assembly further comprises a concentrated water outlet, and the table type water purifier further comprises a concentrated water discharge assembly connected to the concentrated water outlet. Only water molecules and part of beneficial mineral ions to the human body can pass through, and other impurities and heavy metals are discharged from the concentrated water outlet, thereby providing high-quality purified water for the user.

[0007] Illustratively, the raw water tank comprises a tank concentrated water inlet, the concentrated water discharge assembly comprises a concentrated water return pipeline, a water inlet of the concentrated water return pipeline is connected to the concentrated water outlet, and a water outlet of the concentrated water return pipeline is connected to the tank concentrated water inlet, the table type water purifier further comprises a prompt assembly, and the controller is further configured to control the prompt assembly to issue a prompt message when the water level in the raw water tank is lower than or equal to the lower water level limit and before the water replenishment control valve is opened, the prompt message comprising information for reminding the user to empty the raw water tank. In this way, the user can be prompted to empty the concentrated water in the raw water tank in a timely manner. In the case of manual water replenishment, the user can conveniently pour out the concentrated water in the raw water tank before manually replenishing the raw water tank with raw water.

[0008] Exemplarily, the desktop water purifier comprises a position detection assembly for detecting whether the raw water tank is installed to a predetermined position and generating installation information; the controller is further configured to: when the water level is lower than or equal to the lower limit of the water level, control the water replenishment control valve to open based on the installation information that the raw water tank is installed to the predetermined position after being away from the predetermined position for more than or equal to a preset time length. The user can be confirmed to have performed the operation of emptying the raw water tank when the raw water tank is installed to the predetermined position after being away from the predetermined position for more than or equal to the preset time length based on the installation information. Thus, most false operations can be avoided.

[0009] Exemplarily, the desktop water purifier comprises a pressure detection assembly arranged on the water replenishment pipeline and located upstream of the water replenishment control valve, the pressure detection assembly being configured to detect the pressure in the water replenishment pipeline; the controller is further configured to: control the water replenishment control valve to close when the pressure is less than a pressure threshold; and control the water replenishment control valve to close when the pressure is greater than the pressure threshold and the water level is higher than or equal to the upper limit of the water level. Thus, the desktop water purifier can automatically determine whether the tap water inlet receives tap water, and control the water replenishment control valve according to the water level information to achieve automatic water replenishment.

[0010] Exemplarily, the prompt information further comprises information for prompting the user to empty the raw water tank and then fill it up when the pressure is less than the pressure threshold. In the case that the concentrated water return pipeline is open, the user needs to empty the concentrated water in the raw water tank and then fill it up. In the case that the concentrated water discharge pipeline is open, the raw water tank can also be emptied and then filled up to ensure the freshness of the water quality if there is water remaining in the raw water tank.

[0011] Exemplarily, the desktop water purifier further comprises a drain outlet in communication with the outside world, and the concentrated water discharge assembly comprises a concentrated water discharge pipeline, a water inlet of the concentrated water discharge pipeline being in communication with the concentrated water outlet, and a water outlet of the concentrated water discharge pipeline being in communication with the drain outlet. The user can use the concentrated water in the container for various purposes when needed. This is particularly applicable in the case that the application scenario of the desktop water purifier includes a drainage facility.

[0012] Exemplarily, the desktop water purifier further comprises an input assembly configured to receive switching information of the user switching between the manual water replenishment mode and the automatic water replenishment mode; the controller is further configured to: control the water replenishment control valve to close based on the switching information that the desktop water purifier is in the manual water replenishment mode; and control the water replenishment control valve to open based on the switching information that the desktop water purifier is in the automatic water replenishment mode when the water level in the raw water tank is lower than or equal to the lower limit of the water level, and control the water replenishment control valve to close when the water level in the raw water tank is higher than or equal to the upper limit of the water level. The switching information input by the user is received through the input assembly, and a sensor does not need to be arranged to detect whether the water source is changed, the control logic is simpler, and the reliability is higher.

[0013] Exemplarily, the table-type water purifier further comprises a position detection assembly for detecting whether the raw water tank is installed to a predetermined position and generating installation information; the controller is further configured to determine that the raw water tank has been installed to the predetermined position based on the installation information when the water level in the raw water tank is lower than or equal to the lower limit of the water level and before the water replenishment control valve is opened. Based on the installation information, the water replenishment control valve is controlled to be opened, which can avoid leakage of tap water outside the table-type water purifier when the water replenishment control valve is opened without the raw water tank being installed to the predetermined position.

[0014] Exemplarily, the table-type water purifier further comprises a drain port connected to the outside, and the concentrated water discharging assembly further comprises: a concentrated water discharging pipeline, a water inlet of the concentrated water discharging pipeline being connected to the concentrated water outlet, and a water outlet of the concentrated water discharging pipeline being connected to the drain port; and a valve assembly for controlling the concentrated water return pipeline to be at least cut off in a predetermined direction when the concentrated water discharging pipeline is conducted, the predetermined direction being from the concentrated water inlet of the water tank to the concentrated water outlet of the water purifying assembly. The valve assembly is provided to allow only the concentrated water to flow out of the drain port, while avoiding leakage of the raw water in the raw water tank from the drain port.

[0015] Exemplarily, the concentrated water discharging pipeline can be cut off. By cutting off the concentrated water discharging pipeline, the table-type water purifier can be switched from a mode of discharging concentrated water through the drain port to a mode of returning concentrated water to the raw water tank, which can be suitable for various application scenarios. Moreover, the table-type water purifier can be standardized, and users can select the drain mode according to the use environment.

[0016] Exemplarily, the table-type water purifier further comprises a blocking member for opening or closing the drain port, and the concentrated water discharging pipeline is cut off when the blocking member closes the drain port. In this case, the valve assembly can be configured to be automatically opened under water pressure, so that the switching of the concentrated water discharging mode of the table-type water purifier can be realized at a lower cost without control.

[0017] Exemplarily, the table-type water purifier further comprises a first concentrated water electromagnetic valve arranged on the concentrated water discharging pipeline, and the concentrated water discharging pipeline is cut off when the first concentrated water electromagnetic valve is closed. In this way, the user does not need to block the drain port by a plug or a cover, and there is no problem of the blocking member being lost, nor is there a problem of the blocking member being tied to the table-type water purifier by a rope affecting the appearance.

[0018] Exemplarily, the valve assembly comprises one or more of: a first check valve, the first check valve being arranged on the concentrated water return pipeline, the first check valve being configured to be unidirectionally openable along the water draining direction; a second concentrated water electromagnetic valve, the second concentrated water electromagnetic valve being arranged on the concentrated water return pipeline; and a switching valve, the switching valve comprising a valve water inlet, a first valve water outlet and a second valve water outlet, the valve water inlet being connected to the concentrated water outlet of the purified water assembly, the first valve water outlet being connected to the water inlet of the concentrated water return pipeline, and the second valve water outlet being connected to the water inlet of the concentrated water discharge pipeline. The first check valve can be automatically opened under water pressure without control, and can prevent the raw water in the raw water tank from leaking from the water outlet in the case that the concentrated water discharge pipeline is open. The second concentrated water electromagnetic valve can be closed in the case that the concentrated water discharge pipeline is open, thereby preventing the raw water in the raw water tank from leaking from the concentrated water return pipeline. The second concentrated water electromagnetic valve can also be opened in the case that the concentrated water discharge pipeline is closed, thereby allowing the concentrated water to enter the raw water tank through the concentrated water return pipeline. By controlling the switching valve, the concentrated water return into the raw water tank or the concentrated water discharge to the water outlet can be controlled, and in this case, the first blocking member or the first concentrated water electromagnetic valve is not required.

[0019] Exemplarily, the table-type purified drinking machine further comprises a second check valve, the second check valve being arranged on the water supplement pipeline, the second check valve being unidirectionally openable along the direction from the tap water inlet to the water tank water inlet. Since the tap water inlet can be arranged at any suitable position of the table-type purified drinking machine, the tap water inlet can not be closed if there is no water source. Since the water supplement control valve is opened when the water level in the raw water tank is lower than the water level lower limit, the unclosed tap water inlet can cause the water in the raw water tank to leak therefrom or cause foreign matters from outside to enter the raw water tank. By arranging the second check valve, even if the height of the tap water inlet is lower than the liquid level in the raw water tank, the raw water in the raw water tank will not flow out of the tap water inlet.

[0020] Exemplarily, the height of the tap water inlet is not lower than the top of the raw water tank. In this way, even if the tap water inlet can not be closed, the raw water in the raw water tank will not flow out of the tap water inlet.

[0021] Exemplarily, the table-type purified drinking machine further comprises a water quality detection assembly, the water quality detection assembly being configured to detect the water quality in the raw water tank and generate water quality information, and the controller is further configured to control the prompt assembly to issue prompt information when it is determined based on the water quality information that the current water quality is lower than the water quality lower limit. Although the prompt assembly will be controlled to issue prompt information each time the water level in the raw water tank is lower than or equal to the water level lower limit and before the water supplement control valve is controlled to be opened, there can be a case that the user ignores the information or forgets to empty the raw water tank. Therefore, the water quality detection assembly can remind the user again, thereby ensuring that the table-type purified drinking machine is safely and reliably operated.

[0022] A series of simplified forms are introduced in the summary, which will be further described in detail in the specific embodiments part. The summary part does not mean to try to limit the key features and essential technical features of the claimed technical solutions, nor to try to determine the protection scope of the claimed technical solutions.

[0023] The advantages and features of the present application are described in detail below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The following drawings of the present application are hereby incorporated as a part of the present application for understanding the present application. The embodiments of the present application and the description thereof shown in the drawings are used to explain the principles of the present application. In the drawings,

[0025] Figure 1 Water circuit diagram of a table water purifier according to a first exemplary embodiment of the present application;

[0026] Figure 2 Water circuit diagram of a table water purifier according to a second exemplary embodiment of the present application;

[0027] Figure 3 Water circuit diagram of a table water purifier according to a third exemplary embodiment of the present application;

[0028] Figure 4 Water circuit diagram of a table water purifier according to a fourth exemplary embodiment of the present application; and

[0029] Figure 5 Water circuit diagram of a table water purifier according to a fifth exemplary embodiment of the present application.

[0030] Among the above drawings, the following reference signs are included:

[0031] 10, water inlet; 20, water outlet; 70, drain outlet; 80, tap water inlet; 100, raw water tank; 101, water tank water inlet; 102, water tank concentrated water inlet; 103, lower water level limit; 104, upper water level limit; 200, water purifying assembly; 201, raw water inlet; 202, purified water outlet; 203, concentrated water outlet; 210, filter core; 220, booster pump; 230, concentrated water proportional valve; 300, concentrated water discharge pipeline; 310, first concentrated water electromagnetic valve; 400, concentrated water return pipeline; 410, first check valve; 420, second concentrated water electromagnetic valve; 500, water replenishment control valve; 600, water replenishment pipeline; 601, second check valve. DETAILED DESCRIPTION

[0032] In the following description, numerous specific details are provided to provide a thorough understanding of the application. One of ordinary skill in the art will recognize, however, that the application can be practiced without one or more of the specific details. Also, techniques and structures that would be well known to one of ordinary skill in the art have not been described in detail in order to avoid obscuring the application. Other implementations of the application will be apparent to one of ordinary skill in the art upon reviewing this description.

[0033] For a thorough understanding of the application, reference is made to the following detailed description taken in conjunction with the accompanying drawings. It is apparent that the application can be practiced without one or more of the specific details set forth in this description. Specific structural and functional details are provided as examples to provide a thorough understanding of the application. Other implementations can have different structures or functions without departing from the scope of the present application.

[0034] Embodiments of the present application provide a table-top water purifier. A table-top water purifier according to embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0035] Reference is made to Figures 1 to 4 The table-top water purifier has a water intake 10, which can be formed by a water outlet 20 or a faucet or the like structure provided on the table-top water purifier. The table-top water purifier can also include a tap water inlet 80. Illustratively and without limitation, the tap water inlet 80 can be directly connected to a tap water pipe, or connected to a tap water faucet through a faucet adapter and a pipe.

[0036] The table-top water purifier can further include a raw water tank 100 for storing raw water. This allows the user to be provided with purified water by purifying the raw water in the raw water tank 100 when the table-top water purifier is not conveniently connected to a tap water source. The raw water tank 100 is detachable and configured to be filled with raw water when in a detached state. Illustratively and not by way of limitation, the raw water tank 100 can include a water filling port (not shown) through which the user can fill the raw water tank 100 with raw water. The raw water can include, but is not limited to, bottled water, well water, or tap water. The raw water tank 100 can have a water tank water passage 101 that, when in an installed state, is connected to the tap water outlet 80 via the water replenishment conduit 600, thereby allowing replenishment of tap water when the tap water outlet 80 is connected to a tap water source. The water tank water passage 101, when in the installed state, can also be connected to other components of the table-top water purifier, such as the raw water inlet 201 of the water purification assembly 200 mentioned below, thereby providing raw water to the water purification assembly 200. The water tank water passage 101 can be disposed at the bottom of the raw water tank 100, thereby allowing a majority of the raw water in the raw water tank 100 to flow out of the raw water tank 100 through the water tank water passage 101. In an embodiment not shown, the water tank water passage can be disposed at the upper portion of the raw water tank, and raw water can be drawn from the raw water tank through a pipe inserted into the raw water tank from the water tank water passage. Alternatively, the water tank water passage 101 can include a first water tank water passage and a second water tank water passage, the first water tank water passage being connected to the raw water inlet 201 of the water purification assembly 200, and the second water tank water passage being connected to the water replenishment conduit 600.

[0037] The water inlet of the raw water tank 100 can be the same opening as the water tank water outlet 101, thereby reducing the number of openings on the raw water tank 100 and making the structure more simple. Of course, the water inlet and the water tank water outlet 101 can also be different openings. Illustratively but not limitatively, the water inlet and the water tank water outlet 101 can both be arranged at the bottom of the raw water tank 100, which can make the upper part of the raw water tank 100 more simple and improve the user experience. The water inlet can be relatively large in size and have a cover, thereby preventing the raw water from spilling out after the user pours the raw water. Alternatively, the water inlet can be arranged at the bottom of the raw water tank 100. This can make the upper part of the raw water tank 100 more simple and improve the user experience. The detachable raw water tank 100 can facilitate the user to carry it to the location of the water source, such as the location of the tap. In order to facilitate carrying, the upper part of the raw water tank 100 can also be provided with a handle or the like. In the case where the handle is arranged at the upper part, the water inlet is arranged at the bottom of the raw water tank 100, which can avoid the handle interfering with the pouring of the raw water. Alternatively, the water inlet can be arranged at any other suitable position of the raw water tank 100, such as the top. The raw water tank 100 can be installed to the table-type water purifier after a sufficient amount of raw water is poured, and the water tank water outlet 101 is communicated to the raw water inlet 201 when the raw water tank 100 is in the installed state, thereby providing the raw water to the water purifying assembly 200. The water tank water outlet 101 can be provided with a water stop valve (not shown), and when the raw water tank 100 is in the detached state, the raw water cannot flow out through the water stop valve, and when the raw water tank 100 is in the installed state, the raw water can pass through the water stop valve to the raw water inlet 201 communicated by the water tank water outlet 101.

[0038] The table-type water purifier can also include a water purifying assembly 200, which includes a raw water inlet 201 and a purified water outlet 202. As described above, the raw water inlet 201 can be communicated to the water tank water outlet 101, thereby obtaining raw water. The purified water outlet 202 can be communicated to the water outlet 10, thereby providing purified water to the user. Continuing to refer to Figure 1 The water purifying assembly 200 can include a filter element 210, which can include, for example, an activated carbon filter element, a PP filter element, a ceramic filter element, a resin filter element, an ultrafiltration filter element, a nanofiltration filter element, a reverse osmosis filter element, and the like, as well as a composite filter element composed of one or more of the filter elements. For the nanofiltration filter element and the reverse osmosis filter element, appropriate pressure is required when they are working, and therefore the water purifying assembly 200 can also include a booster pump 220. The filter element 210 can filter the raw water, thereby removing harmful bacteria, heavy metals and other impurities therein, and providing high-quality purified water to the user.

[0039] The table-type water purifier can further comprise a water level detection assembly for detecting the water level in the raw water tank 100. Exemplarily, the water level detection assembly can comprise one or more of an infrared water level meter, a float water level meter, an ultrasonic water level meter, or any suitable sensor. The table-type water purifier can further comprise a water replenishment control valve 500 and a controller. The water replenishment control valve 500 is arranged on the water replenishment pipeline 600. The controller is configured to control the water replenishment control valve 500 to open when the water level in the raw water tank 100 is lower than or equal to the lower water level limit 103, and to control the water replenishment control valve 500 to close when the water level in the raw water tank 100 is higher than or equal to the upper water level limit 104. The controller can be built with electronic elements such as timers, comparators, registers, digital logic circuits, or implemented with processor chips such as single-chip microcomputers, microprocessors, programmable logic controllers (PLCs), digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), application-specific integrated circuits (ASICs), and peripheral circuits thereof. By detecting the water level, the controller can control the water replenishment control valve 500 to replenish raw water in the raw water tank 100 in time when the water level is too low, and control the water replenishment control valve 500 to close when the water level reaches the upper water level limit 104, so as to avoid water overflow from the raw water tank 100.

[0040] In the above technical solution, the user can provide raw water to the water purifying assembly 200 through the raw water tank 100 in a use scenario where it is inconvenient to connect to a tap water source. The user can detach the raw water tank 100 and manually fill it with raw water. In a use scenario where the table-type water purifier can be connected to a tap water source, the table-type water purifier can automatically replenish the raw water tank 100 to the upper water level limit 104 when the water level in the raw water tank 100 is lower than or equal to the lower water level limit 103 through the water replenishment control valve 500, so as to avoid the user manually detaching the raw water tank 100 and manually filling it with water. In addition, in the latter use scenario, if the tap water supply is interrupted, the raw water tank 100 can be manually replenished with raw water; and when the tap water supply is restored, the table-type water purifier can automatically switch to automatically replenish the raw water tank 100 with raw water. Thus, the needs of various use scenarios can be met, and the user experience is improved.

[0041] Exemplarily, the water purification assembly 200 can further include a concentrated water outlet 203, and the table-type water purification and drinking machine can further include a concentrated water discharging assembly in communication with the concentrated water outlet 203. The nanofiltration filter element and the reverse osmosis filter element generate a certain proportion of concentrated water during operation. Therefore, the water purification assembly 200 including one or both of the nanofiltration filter element and the reverse osmosis filter element is further provided with the concentrated water outlet 203. The concentrated water outlet 203 is in communication with a concentrated water port of the filter element 210 through a concentrated water proportioning valve 230. When the concentrated water proportioning valve 230 is in a closed state, the pressure required for normal operation of the filter element 210 can be maintained. When the concentrated water proportioning valve 230 is in an open state, raw water can quickly pass through the filter element 210 and the concentrated water proportioning valve 230, so as to flush the filter element 210. Taking the water purification assembly 200 including the reverse osmosis filter element as an example, the pore size of the reverse osmosis filter element is one millionth of a hair (0.1 nanometer), and bacteria and viruses that cannot be seen by the naked eye are 10 times larger than the pore size. Therefore, only water molecules and part of beneficial mineral ions to the human body can pass through, and other impurities and heavy metals are discharged through the concentrated water outlet, so as to provide high-quality purified water for users. The daily water production of the reverse osmosis filter element is positively correlated with the price of the reverse osmosis filter element. Therefore, the filter element 210 can adopt a small-flux filter element with a daily water production of not greater than 400 gallons. On the premise of meeting the basic needs of users, the cost can be greatly reduced, and the size of the table-type water purification and drinking machine can be reduced. The concentrated water discharging assembly can discharge the concentrated water in various suitable manners, such as discharging the concentrated water to the raw water tank 100 or discharging the concentrated water to the outside world, which will be mentioned below. For the convenience of description, the filter element 210 is taken as an example of a small-flux reverse osmosis filter element and is described in detail below.

[0042] Exemplarily, the raw water tank 100 can include a water tank concentrated water inlet 102, and the concentrated water discharging assembly can include a concentrated water backflow pipeline 400. A water inlet of the concentrated water backflow pipeline 400 is in communication with the concentrated water outlet 203, and a water outlet of the concentrated water backflow pipeline 400 is in communication with the water tank concentrated water inlet 102. Specifically, the water tank concentrated water inlet 102 can be connected to the concentrated water outlet 203 of the water purification assembly 200 through the concentrated water backflow pipeline 400 when the raw water tank 100 is in an installed state. In some application scenarios, the table-type water purification and drinking machine can not be convenient to discharge the concentrated water to the outside of the table-type water purification and drinking machine through a drain, for example, the table-type water purification and drinking machine can be placed in a bedroom or an office. At this time, the concentrated water can be discharged to the raw water tank 100 through the concentrated water backflow pipeline 400. In some specific embodiments, a partition can be arranged in the raw water tank 100, and the partition can partially separate the water tank concentrated water inlet 102 and the water tank water inlet 101, so as to reduce the proportion of the concentrated water mixed into the raw water or avoid the mixing of the concentrated water and the raw water.

[0043] Therefore, the controller is further configured to control the prompting assembly to output a prompt information when the water level in the raw water tank 100 is lower than or equal to the lower water level limit 103 and before the control of the opening of the water replenishing control valve 500, the prompt information including information for reminding the user to empty the raw water tank 100. In this way, the user can be prompted to empty the concentrated water in the raw water tank 100 in time. In the case of manual water replenishment, the user can empty the concentrated water in the raw water tank 100 before manually replenishing raw water into the raw water tank 100.

[0044] In one specific embodiment, the prompting assembly can include a voice prompting assembly, and the prompt information can include an audio such as "please empty the raw water tank". In this way, the user can be explicitly prompted, and the user experience can be improved. Of course, alternatively, the prompt information can also take any other suitable form, such as text, arrangement of prompt lights, color and / or flashing pattern, etc.

[0045] In one specific embodiment, the prompting assembly can include a voice prompting assembly, and the prompt information can include an audio such as "please empty the raw water tank". In this way, the user can be explicitly prompted, and the user experience can be improved. Of course, alternatively, the prompt information can also take any other suitable form, such as text, arrangement of prompt lights, color and / or flashing pattern, etc.

[0046] In one specific embodiment, the prompting assembly can include a voice prompting assembly, and the prompt information can include an audio such as "please empty the raw water tank". In this way, the user can be explicitly prompted, and the user experience can be improved. Of course, alternatively, the prompt information can also take any other suitable form, such as text, arrangement of prompt lights, color and / or flashing pattern, etc.Figure 2 As shown, the table-top water purifier can further include a drain port 70 for communication with the outside. The concentrated water discharging assembly includes a concentrated water discharging pipeline 300, the water inlet of the concentrated water discharging pipeline 300 is connected to the concentrated water outlet 203, and the water outlet of the concentrated water discharging pipeline 300 is connected to the drain port 70. For example, the drain port 70 can be connected to a drain pipe, and the drain pipe can be connected to a sewer or a container for collecting concentrated water. The user can use the concentrated water in the container for various purposes when needed. This is particularly applicable in the case where the application scenario of the table-top water purifier includes a drainage facility.

[0047] In the above technical solution, the user can store or discard the concentrated water discharged through the drain port 70 as needed, thereby increasing the diversity of user choices. The user can recycle the collected concentrated water to save water. When using the raw water tank 100 to supply water, directly discharging the concentrated water through the drain port 70 can maintain the water quality in the raw water tank 100 unchanged compared to returning the concentrated water to the raw water tank 100, and can extend the service life of the filter element 210 to a certain extent. After using the table-top water purifier for the first time or replacing the filter element 210, the concentrated water proportioning valve 230 can be opened to flush the filter element 210 to clean the protective liquid. After the filter element 210 is used for a period of time, the concentrated water proportioning valve 230 can also be opened to flush the filter element 210, thereby removing dirt on the surface of the filter element 210 and extending the service life of the filter element 210. During the flushing process, the table-top water purifier provided with the drain port 70 can quickly discharge the contaminated water after flushing from the drain port 70 instead of returning it to the raw water tank 100, which can ensure that the water for flushing the filter element 210 is always relatively clean and can improve the flushing efficiency of the filter element 210.

[0048] It should be noted that, since the concentrated water generated during the water production process of the water purifying assembly 200 does not need to be returned to the raw water tank 100, the lower water level limit 103 can be set lower, and can even be the water level at which the raw water tank 100 is empty. In the case where the concentrated water outlet 203 of the water purifying assembly 200 is only connected to the water tank concentrated water inlet 102 of the raw water tank 100, Figure 1 ) Since the concentrated water generated during the water production process of the water purifying assembly 200 can be returned to the raw water tank 100, the lower water level limit 103 can be set higher, for example, to the water level at which the concentrated water generated after all the raw water in the full raw water tank 100 is consumed.

[0049] Exemplarily, as Figure 3In the case that the table-top water purifier includes the concentrated water return pipeline 400, the drain port 70 and the concentrated water discharge pipeline 300 can also be provided. Thus, it can be selected whether to discharge the concentrated water outside the table-top water purifier through the drain port 70 or to return the concentrated water to the raw water tank 100 according to whether there is a drain condition in the use environment. In this case, the table-top water purifier can also include a valve assembly. The valve assembly is used to control the concentrated water return pipeline 400 to be at least cut off in a predetermined direction from the water tank concentrated water inlet 102 to the concentrated water outlet 203 of the water purifying assembly 200 when the concentrated water discharge pipeline 300 is conducted. Exemplarily, the valve assembly can include a first one-way valve 410. Specifically, when the concentrated water discharge pipeline 300 is conducted, the concentrated water return pipeline 400 can be divided into two cases: 1) one-way conducted in a direction opposite to the predetermined direction, and the concentrated water can enter the raw water tank 100 along the concentrated water return pipeline 400; 2) the concentrated water return pipeline 400 is cut off in both directions. It is easy to understand that if the valve assembly is not provided, the raw water in the raw water tank 100 can enter the concentrated water discharge pipeline 300 through the concentrated water return pipeline 400 when the concentrated water discharge pipeline 300 is conducted, and flow out from the drain port 70. The provision of the valve assembly can only allow the concentrated water to flow out from the drain port 70, while avoiding the raw water in the raw water tank 100 from leaking out from the drain port 70.

[0050] Exemplarily, the table-top water purifier can also include a position detection assembly for detecting whether the raw water tank 100 is installed to a predetermined position and generating installation information. The position detection assembly can include one or more of any suitable sensor such as an infrared sensor, a contact sensor such as a microswitch, a proximity sensor such as a hall switch lamp, etc. The position detection assembly can generate an analog signal or a digital signal. Exemplarily, the position detection assembly can output a position signal when the raw water tank 100 is in an installed state, and interrupt the output of the position signal when the raw water tank 100 is in a disassembled state. Exemplarily, the position detection assembly can send information to the controller in real time, and the controller determines whether the raw water tank 100 is installed in place according to the information. For the embodiment that the concentrated water is returned to the raw water tank 100 through the concentrated water return pipeline 400, the controller is also used to control the water replenishing control valve 500 to be opened based on the installation information when the water level is lower than or equal to the lower water level limit 103 after the raw water tank 100 is installed to the predetermined position for a time greater than or equal to a preset time after the raw water tank 100 is removed from the predetermined position for a time greater than or equal to the preset time.

[0051] As mentioned above, when the water level is below the lower water level limit 103, the raw water tank 100 needs to be emptied manually by the user and then be refilled with raw water, because the concentrated water that flows back through the concentrated water backflow pipeline 400 is stored in the raw water tank 100. Thus, whether the user has performed the operation of emptying the raw water tank 100 can be determined by detecting whether the raw water tank 100 is disassembled. The in-place detection assembly can be disturbed during work, so that the signal fluctuates temporarily, or the table-type water purifier can be vibrated, so that the installation information is temporarily interrupted. To avoid the situation that the controller controls the water replenishing control valve 500 to be opened and water to be replenished when the user does not empty the raw water tank 100, it can be confirmed that the user has performed the operation of emptying the raw water tank 100 when the raw water tank 100 is installed to the predetermined position after the duration that the raw water tank 100 is determined to be away from the predetermined position based on the installation information is greater than or equal to the preset duration. In this way, most false operations can be avoided.

[0052] Exemplarily, the table-type water purifier can comprise a pressure detection assembly (not shown) which can be arranged on the water replenishing pipeline 600 and upstream of the water replenishing control valve 500, and is configured to detect the pressure in the water replenishing pipeline 600. The pressure detection assembly can generate pressure information according to the pressure in the water replenishing pipeline 600. The pressure detection assembly can comprise a suitable element such as an analog pressure sensor, a digital pressure sensor, etc. Specifically, for example, the pressure detection assembly can comprise a pressure switch which is configured to turn on the circuit when the water pressure in the water replenishing pipeline 600 is greater than a certain pressure threshold, and turn off the circuit when the water pressure in the water replenishing pipeline 600 is less than the pressure threshold. The controller is further configured to control the water replenishing control valve 500 to be closed when the pressure in the water replenishing pipeline 600 is less than the pressure threshold based on the pressure information. It is easy to understand that, because there is water pressure in the tap water, when the tap water inlet 80 is not connected to a tap water source, or the connected tap water source cannot provide tap water, the pressure represented by the pressure information is much less than the water pressure of the tap water. At this time, it is meaningless to open the water replenishing control valve 500, and the raw water in the raw water tank 100 can also 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. By opening the water replenishing control valve 500, tap water can be replenished into the raw water tank 100. When the water level is higher than or equal to the upper water level limit 104, the water replenishing control valve 500 is controlled to be closed to avoid water overflowing from the raw water tank 100.

[0053] Exemplarily, in the case that the pressure detecting assembly is the pressure switch as described above, the pressure information indicating that the circuit is on means that the pressure is higher than or equal to the pressure threshold. In the case that the pressure detecting assembly comprises an analog or digital pressure sensor, the controller needs to compare the pressure indicated by the pressure information with the preset pressure threshold. Thus, the table water purifier can automatically determine whether the tap water inlet 80 receives tap water, and control the water replenishing valve 500 according to the water level information to achieve automatic water replenishment. Since the water pressure of tap water can vary due to different regions, floors, and the number of people using tap water, the pressure threshold can be a range of values. Higher than or equal to the pressure threshold means that the current pressure is higher than or equal to the upper limit of the pressure threshold. Lower than the pressure threshold means that the current pressure is lower than the lower limit of the pressure threshold. The pressure threshold can be set in a reasonable range to ensure that the table water purifier can replenish water normally under this pressure, and to avoid false judgments caused by water pressure fluctuations. Alternatively, the pressure threshold can also be a single value.

[0054] Exemplarily, when the pressure in the water replenishing pipeline 600 is less than the pressure threshold, the prompt information further comprises information for prompting the user to empty and then fill the raw water tank 100. As described above, the controller can determine that the raw water tank 100 needs to be manually replenished when the pressure in the water replenishing pipeline 600 is less than the pressure threshold according to the pressure information. In the case that the concentrated water backflow pipeline 400 is open, the user needs to empty the concentrated water in the raw water tank 100 and then fill the raw water tank 100. In the case that the concentrated water discharge pipeline 300 is open, if there is water remaining in the raw water tank 100, the raw water tank 100 can also be emptied and then filled to ensure the freshness of the water quality.

[0055] Exemplarily, the table water purifier can comprise an input assembly for receiving switching information input by the user between the manual water replenishing mode and the automatic water replenishing mode. The input assembly can comprise a touch screen, a button, etc. Alternatively, the input assembly can also comprise a receiver for accepting mode selection operations input by the user through a user operation interface on the electronic device. In summary, the input assembly can be used to receive switching information input by the user.

[0056] The controller can also be used to determine whether the countertop water purifier is in manual or automatic water replenishment mode based on switching information. Exemplarily, and not limitingly, the input component can 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 can be located in a position that is difficult for users to access during daily use. Specifically, when the countertop water purifier is determined to be in manual water replenishment mode, since the tap water inlet 80 is not connected to a tap water source, opening the water replenishment control valve 500 is meaningless; therefore, the water replenishment control valve 500 can be closed to prevent water from the raw water tank 100 from accidentally flowing out of the tap water inlet 80. When the countertop water purifier is determined to be in automatic water replenishment mode, the controller can open the water replenishment control valve 500 when the water level in the raw water tank 100 is lower than or equal to the lower water level 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 water level limit 104, the controller can close the water replenishment control valve 500. This prevents water from overflowing from the raw water tank 100 even when it is fully filled with tap water. By receiving user input switching information through the input component, there is no need to set up sensors to detect changes in the water source, resulting in simpler control logic and higher reliability.

[0057] In an embodiment where the countertop water purifier discharges concentrated water to the outside through drain outlet 70, such as Figure 2 As shown, the countertop water purifier may also include a positioning detection component, which detects whether the raw water tank 100 is installed in the predetermined position and generates installation information. The controller is also used to determine, based on the installation information, that the raw water tank 100 has been installed in the predetermined position when the water level in the raw water tank 100 is lower than or equal to the lower water level limit 103 and before the water supply control valve 500 is opened. It can be understood that tap water is first supplied to the raw water tank 100 through the water supply pipeline, and then provided to the raw water inlet 201. Controlling the opening of the water supply control valve 500 based on the installation information can prevent tap water from leaking outside the countertop water purifier if the raw water tank 100 is not installed in the correct position.

[0058] like Figure 3As shown, in the embodiment in which the table-top water purifier comprises the concentrated water return pipeline 400 as well as the drain port 70 and the concentrated water discharge pipeline 300, the concentrated water discharge pipeline 300 is exemplarily blocked. Generally, when the concentrated water discharge pipeline 300 is open, the concentrated water will hardly generate pressure in the concentrated water return pipeline 400. Therefore, the concentrated water almost entirely flows out of the drain port 70 and will not enter the raw water tank 100. When the concentrated water discharge pipeline 300 is blocked, the concentrated water will not flow out of the drain port 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. In the case that the table-top water purifier is provided with the 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 further enter the raw water tank 100. In summary, by blocking the concentrated water discharge pipeline 300, the table-top water purifier can be switched from the mode in which the concentrated water is discharged through the drain port 70 to the mode in which the concentrated water is returned to the raw water tank 100, which can be suitable for various application scenarios. Moreover, the table-top water purifier can also be standardized, and the user can select the drain mode according to the use environment.

[0059] As above, by blocking the concentrated water discharge pipeline 300, the concentrated water generated during the water production process of the water purifying assembly 200 can be returned to the raw water tank 100. Exemplarily, the table-top water purifier can further comprise a blocking member (not shown) for opening or closing the drain port 70, and the concentrated water discharge pipeline 300 is blocked when the blocking member closes the drain port 70. The blocking member can comprise a plug or a cover, which can be retained in the drain port 70 by threads or friction, so as to prevent the concentrated water from flowing out of the drain port 70. In this case, the valve assembly can be configured to be automatically opened under water pressure, so that the switching of the concentrated water discharge mode of the table-top water purifier can be realized at a low cost without control. In an embodiment not shown, the blocking member can also comprise a mechanical valve or a faucet structure arranged at the drain port 70.

[0060] Exemplarily, as shown, Figure 4 The table-top water purifier can further comprise a first concentrated water electromagnetic valve 310 arranged on the concentrated water discharge pipeline 300, and the concentrated water discharge pipeline 300 is blocked when the first concentrated water electromagnetic valve 310 is closed. By arranging the first concentrated water electromagnetic valve 310, the table-top water purifier can prevent the concentrated water from flowing out of the drain port 70 and return the concentrated water to the raw water tank 100 in response to the operation of the user. In this way, the user does not need to block the drain port 70 by the plug or the cover, and there will be no problem of losing the blocking member, nor will there be the problem of affecting the appearance by tying the blocking member to the table-top water purifier by a rope. In the case that the table-top water purifier is provided with the first concentrated water electromagnetic valve 310, the valve assembly can be configured to be automatically opened under water pressure, or can be controlled to be opened and closed and be exactly opposite to the opening and closing of the first concentrated water electromagnetic valve 310.

[0061] The foregoing valve assembly can include one or more of the following. In Figure 4 In the illustrated example embodiment, the valve assembly can include a first check valve 410. The first check valve 410 can be disposed on the concentrate return line 400 and configured to be unidirectionally conductive in a direction opposite to the predetermined direction described above. That is, the first check valve 410 can be unidirectionally conductive in a direction from the concentrate outlet 203 of the purified water assembly 200 to the concentrate inlet 102 of the raw water tank 100. The first check valve 410 can be automatically opened under water pressure without control and can prevent raw water in the raw water tank 100 from leaking from the drain 70 when the concentrate discharge line 300 is conductive. In the case where the valve assembly includes the first check valve 410, the concentrate discharge line 300 can be blocked by the plug or by the first concentrate solenoid valve 310.

[0062] Taking the example of a diaphragm check valve for the first check valve 410, the concentrate in the concentrate discharge line 300 only needs to overcome the pressure of the water in the raw water tank 100 and can pass through the first check valve 410 at a very small pressure. The concentrate discharge line 300 can deposit scale during long-term use, causing the pressure in the concentrate discharge line 300 and the portion of the concentrate return line 400 directly connected to the concentrate discharge line 300 to further increase during the discharge of the concentrate. Therefore, the concentrate can partially pass through the concentrate discharge line 300 from the drain 70, and the other part returns to the raw water tank 100 under the action of pressure. Illustratively, the first check valve 410 can be configured to have a large opening pressure, and only when the drain 70 is mostly or even completely closed, the water pressure of the concentrate can cause the first check valve 410 to open. In this way, under the condition that the concentrate discharge line 300 is normally conductive, the first check valve 410 is equivalent to completely blocking the concentrate return line 400 from two directions, so that the concentrate can be prevented from entering the raw water tank 100 and only discharged through the drain 70, and the user does not need to pour the concentrate in the raw water tank 100.

[0063] In Figure 5In 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.

[0064] 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 203 of the water purification assembly 200, 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.

[0065] For example, such as Figures 1 to 5 As shown, the countertop water purifier may also include a second one-way valve 601 disposed on the water supply line 600. The second one-way valve 601 is unidirectionally open from the tap water inlet 80 to the raw water inlet 201 of the water purification component. It is easy to understand 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. Since the water supply control valve 500 opens when the water level in the raw water tank 100 is below the lower limit 103, an unclosed tap water inlet 80 may cause water in the raw water tank 100 to leak from there or allow foreign matter to enter the raw water tank 100. By providing the second 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. In this way, even if the tap water inlet 80 is not sealed, the raw water in the raw water tank 100 will not flow out from the tap water inlet 80.

[0066] In the description of the application, it should be understood that the orientation words such as "front", "back", "up", "down", "left", "right", "transverse", "vertical", "vertical", "horizontal" and "top", "bottom" and the like indicated orientation or positional relationship are generally based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; The orientation words "in", "out" refer to the inside and outside relative to the contour of each component.

[0067] For the convenience of description, the area relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the area position relationship of one or more components or features shown in the figure with other components or features. It should be understood that the area relative terms not only include the position of the components described in the figure, but also include different positions in use or operation. For example, if the components in the figure are inverted as a whole, the components "above" or "above" other components or features will include the components "below" or "below" other components or structures. Therefore, the exemplary term "above" can include both "above" and "below". In addition, the components or features can also be positioned at other different angles (for example, rotated by 90 degrees or other angles), and all these cases are intended to be included herein.

[0068] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the features, steps, operations, components, assemblies and / or combinations thereof are present.

[0069] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein.

[0070] The present application has been described by way of the above examples, but it should be understood that the above examples are for illustrative and explanatory purposes only, and are not intended to limit the present application to the scope of the described examples. Furthermore, those skilled in the art can understand that the present application is not limited to the above examples, and that various modifications and changes can be made to the present application according to the teachings of the present application, and that these modifications and changes all fall within the scope of the present application claimed. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A countertop water purifier, having a water inlet, characterized in that, The countertop water purifier includes: Water inlet; The raw water tank is detachable and is constructed such that it can be filled with raw water in the detached state. The raw water tank has a water tank inlet, which is connected to the tap water outlet through a water supply pipe when the raw water tank is installed. A water purification component, comprising a raw water inlet and a purified water outlet, wherein the raw water inlet is connected to the water tank outlet and the purified water outlet is connected to the water intake outlet; A water level detection component, wherein the water level detection component is used to detect the water level in the raw water tank; Water supply control valve, wherein the water supply control valve is installed on the water supply pipeline; and The controller is used to open the water replenishment control valve when the water level in the raw water tank is lower than or equal to the lower limit of the water level, and to close the water replenishment control valve when the water level in the raw water tank is higher than or equal to the upper limit of the water level.

2. The countertop water purifier according to claim 1, characterized in that, The water purification component also includes a concentrated water outlet, and the countertop water purifier also includes a concentrated water discharge component connected to the concentrated water outlet.

3. The countertop water purifier according to claim 2, characterized in that, The raw water tank includes a concentrate inlet, and the concentrate discharge assembly includes a concentrate return pipeline. The inlet of the concentrate return pipeline is connected to the concentrate outlet, and the outlet of the concentrate return pipeline is connected to the concentrate inlet of the water tank. The countertop water purifier also includes a notification component. The controller is also used to control the prompting component to issue a prompting message when the water level in the raw water tank is lower than or equal to the lower limit of the water level and before controlling the water replenishment control valve to open. The prompting message includes information to remind the user to empty the raw water tank.

4. The countertop water purifier according to claim 3, characterized in that, The countertop water purifier includes a positioning detection component, which is used to detect whether the raw water tank is installed in a predetermined position and generate installation information. The controller is also used to: when the water level is lower than or equal to the lower limit of the water level, and when the raw water tank is installed in the predetermined position after the time it has been away from the predetermined position is greater than or equal to a preset time, based on the installation information, control the water replenishment control valve to open.

5. The countertop water purifier according to claim 3, characterized in that, The countertop water purifier includes a pressure detection component, which is disposed on the water supply pipe and located upstream of the water supply control valve. The pressure detection component is used to detect the pressure in the water supply pipe. The controller is further configured to: control the water supply control valve to close when the pressure is less than the pressure threshold; and control the water supply control valve to close when the pressure is greater than the pressure threshold and the water level is higher than or equal to the upper limit of the water level.

6. The countertop water purifier according to claim 5, characterized in that, When the pressure is less than the pressure threshold, the prompt information also includes information to prompt the user to empty and then refill the raw water tank.

7. The countertop water purifier according to claim 2, 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.

8. The countertop water purifier according to claim 7, characterized in that, The countertop water purifier also includes 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 controller is also used for: Based on the switching information, if it is determined that the manual water replenishment mode is in effect, the water replenishment control valve is controlled to close. Based on the switching information, when the system is in the automatic water replenishment mode, the water replenishment control valve is opened when the water level in the raw water tank is lower than or equal to the lower limit of the water level, and the water replenishment control valve is closed when the water level in the raw water tank is higher than or equal to the upper limit of the water level.

9. The countertop water purifier according to claim 7, 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 in the raw water tank is lower than or equal to the lower limit of the water level and before controlling the opening of the water replenishment control valve.

10. 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.

11. The countertop water purifier according to claim 10, characterized in that, The concentrated wastewater discharge pipeline can be shut off.

12. The countertop water purifier according to claim 11, 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.

13. The countertop water purifier according to claim 12, characterized in that, The valve assembly includes one or more of the following: A first one-way valve is disposed on the concentrate return pipeline, and the first 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.

14. The countertop water purifier according to claim 1, characterized in that: The countertop water purifier also includes a second one-way valve, which is disposed on the water supply pipe and is unidirectionally openable along the direction from the tap water inlet to the water tank outlet; and / or The height of the tap water inlet shall not be lower than the top of the raw water tank.

15. The countertop water purifier according to claim 3, characterized in that, The countertop water purifier also includes a water quality detection component, which is used to detect the water quality in the raw water tank and generate water quality information. The controller is also used to control the prompting component to issue the prompting information when it is determined based on the water quality information that the current water quality is below the lower limit of water quality.

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