Water purifier

Abstract

The utility model provides a water purifier which is provided with a tap water port, a water taking port and a water discharging port, the water purifier further comprises a filtering assembly, the filtering assembly comprises a raw water inlet, a purified water outlet and a concentrated water outlet, the raw water inlet is communicated to the tap water port through a raw water pipeline, and the water pressure of the raw water inlet is not larger than that of the tap water port; the concentrated water outlet is communicated with a water outlet which is communicated with the outside; a water inlet of the water purification tank is communicated to the purified water outlet, and a water outlet of the water purification tank is communicated to the water intake; the water level detection assembly is used for detecting the water level in the water purification tank; the water inlet control valve is arranged on the raw water pipeline, and the water inlet control valve is closed when the water level is greater than or equal to the upper limit of the water level. A booster pump is omitted, pure water is prepared only through water pressure of tap water, and noise generated during water preparation of the water purifier can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, and specifically, to a water purifier. Background Art

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

[0003] In the entire market environment, the demand for the flux of reverse osmosis water purifiers shows an increasing trend. Reverse osmosis water purifiers rely on reverse osmosis membranes for filtration, and the normal operation of reverse osmosis membranes requires a certain pressure. The water pressure of tap water is usually not sufficient to meet the rated working pressure requirements of reverse osmosis membranes. Therefore, water purifiers on the market are usually equipped with booster pumps to increase the water pressure.

[0004] The noise generated by the booster pump during operation has become the main source of noise of the water purifier and is also a major problem for user complaints, causing interference to users' daily work and life. How to reduce noise has become the key. Summary of the Utility Model

[0005] In order to at least partially solve the problems existing in the prior art, some embodiments of the utility model provide a water purifier. The water purifier has a tap water port, a water intake port, and a drainage port. The water purifier includes: a filtration assembly, which includes a raw water inlet, a purified water outlet, and a concentrated water outlet. The raw water inlet is connected to the tap water port through a raw water pipeline, and the water pressure at the raw water inlet is not greater than the water pressure at the tap water port. The concentrated water outlet is connected to the drainage port, and the drainage port is connected to the outside; a water purification tank, the water inlet of the water purification tank is connected to the purified water outlet, and the water outlet of the water purification tank is connected to the water intake port; a water level detection assembly for detecting the water level in the water purification tank; and an inlet control valve provided on the raw water pipeline, and the inlet control valve closes when the water level is greater than or equal to the upper water level limit. In the above technical solution, the user can store or discard the concentrated water by himself through the drainage port, thereby increasing the user's choice. The user can reuse the collected concentrated water to save water. By canceling the booster pump and only extracting purified water by the water pressure of tap water, the noise generated by the water purifier can be greatly reduced. Since the water pressure of tap water usually cannot reach the rated working pressure of the filtration assembly, the filtration efficiency of the filtration assembly is lower than that during normal operation. Therefore, a water purification tank is provided to store the purified water output by the filtration assembly. When the water level in the water purification tank drops, the water purifier starts the inlet control valve through the water level detection assembly and the inlet control valve to allow tap water to enter the filtration assembly for water production. In this way, it is usually possible to ensure that there is sufficient purified water in the water purification tank when the user takes water. When the water level in the water purification tank reaches the upper limit, the raw water pipeline is cut off to prevent the purified water from overflowing. In short, the water purifier can quickly provide a large amount of purified water to the user, and after the user takes water, it slowly replenishes water into the water purification tank until it is full with very low noise.

[0006] Exemplarily, the water purifier further includes a first pipeline and a pumping assembly. The water inlet of the first pipeline is connected to the water outlet of the water purification tank, and the water outlet of the first pipeline is connected to the water intake. The pumping assembly includes a first pump disposed on the first pipeline. When the user takes water, the first pump can extract the purified water stored in the water purification tank and pump it to the water intake. In this way, purified water can be provided to the user at a relatively large flow rate. And even if the position of the water intake of the water purifier is higher than that of the water purification tank, the purified water can still be pumped to the water intake by the first pump. In some embodiments, the first pump can also be used to adjust the output flow rate of the purified water.

[0007] Exemplarily, the water purifier further includes a heating assembly. The heating assembly is connected in series on the first pipeline and is located downstream of the first pump. The first pump is a flow control pump. The flow control pump and the heating assembly cooperate with each other, and can accurately control the water temperature of the output water flow by changing the water flow rate and the heating power. Specifically, for example, when the temperature of the hot water output by the water purifier is relatively high, since the heating power of the heating assembly is limited, the pumping flow rate of the flow control pump can be appropriately reduced so that the temperature of the output hot water meets the requirements.

[0008] Exemplarily, the water purifier further includes: an input component, which is used to receive the user's water intake operation and generate water intake information; a controller, which is used to: based on the water intake information, control the pumping flow rate of the first pump and the heating power of the heating assembly. The input component is used to receive the user's water intake operation and generate water intake information. The controller can control the flow control pump to change the flow rate based on the water intake information, or control the heating power of the heating assembly based on the water intake information, or control the working duration of the flow control pump based on the water intake information, thereby controlling the amount of purified water, and can also control one or more of the above simultaneously. In this way, purified water in a desired state including the desired amount of water, the desired flow rate, and the desired water temperature can be provided to the user.

[0009] Exemplarily, the water purifier further includes a second pipeline connected in parallel with the first pipeline between the water outlet of the water purification tank and the water intake. The pumping assembly further includes a second pump disposed on the second pipeline. Among them, the rated pumping flow rate of the second pump is greater than that of the first pump. When the user has a relatively high requirement for the water intake flow rate, the water purifier can pump out the purified water at a large flow rate through the second pump on the second pipeline.

[0010] Exemplarily, the water purifier further includes: an input component for receiving the water intake flow rate of the user and generating flow rate information; a controller for: controlling the operation of the first pump and / or the second pump based on the flow rate information. The input component can also generate flow rate information by receiving the water intake flow rate of the user. The controller can select to control the operation of the first pump or the second pump by determining the flow rate information. In some specific scenarios, the controller can also control the first pump and the second pump to operate simultaneously. Exemplarily, when the user takes cold water, it can be pumped by the second pump and sent to the water intake port. At this time, the output flow rate can reach more than 2 L / min, achieving large-flow water supply.

[0011] Exemplarily, the water purifier further includes a prompting component and a controller. The controller is further configured to control the pumping component to close and control the prompting component to send a prompting message when the water level is lower than or equal to the lower water level limit. When the water level in the water purification tank is too low, the water purification output flow rate is too small or even no water is output. Not only can the user not take water, but it will also cause the pumping component to run idly. The pumping component running idly may cause the motor to overheat and even be damaged. In the case where the water purifier includes a heating component, if water supply continues when the water level in the water purification tank is too low, it may also cause the heating component to dry burn. The controller controls the prompting component to send a prompting message to the user and at the same time controls the pumping component to close, which can protect the pumping component and the heating component, and at the same time give the user feedback so that the user clearly knows that water cannot be taken, improving the user experience.

[0012] Exemplarily, the water purifier further includes a controller for controlling the inlet control valve to close when the water level is greater than or equal to the upper water level limit. The controller can cut off the raw water pipeline when the water level in the water purification tank reaches the upper limit, which can prevent the purified water from overflowing.

[0013] Exemplarily, the filtration component can include a reverse osmosis filter element. Exemplarily, the daily water production of the filtration component is not less than 400 gallons. The reverse osmosis filter element can provide high-quality purified water for users. When using the pressure of tap water as the working pressure of the filtration component, the water output flow rate is about one-third of the rated purified water flow rate. Therefore, using a small-flux filtration component (daily water production not greater than 400 gallons) will cause the purified water flow rate of the water purifier to be further reduced, making it difficult to meet the user's usage requirements. And with the development of water purification technology, the price of large-flux filtration components has gradually decreased to a range acceptable to users. Therefore, preferably, the water purifier uses a large-flux filtration component. In a specific embodiment, the water purifier uses a filtration component with a daily water production of 600 gallons. Under the pressure of tap water, the daily water production can reach 200 gallons. Together with the water purification tank, it is equivalent to a water purifier with a small-flux filtration component equipped with a booster pump, which is sufficient to meet the user's needs.

[0014] Exemplarily, the water purifier further includes a pre-filter, which is serially arranged on the raw water pipeline and located between the inlet control valve and the filtration assembly. The pre-filter can preliminarily filter the water entering the filtration assembly to remove relatively large impurities such as sediment and rust, so as to extend the service life of the filtration assembly. A bypass can also be additionally provided at the water outlet of the pre-filter for providing domestic water after rough filtration to users, which can be used for washing vegetables and rinsing rice, etc.

[0015] Exemplarily, the pre-filter is located between the tap water outlet and the inlet control valve. In this way, the pre-filter can also provide protection for the inlet control valve to extend its service life.

[0016] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the specific implementation part. The utility model content part does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0017] The following will detail the advantages and features of the present utility model in conjunction with the accompanying drawings. Brief Description of the Drawings

[0018] The following drawings of the present utility model are used as a part of the present utility model to understand the present utility model. The embodiments and descriptions of the present utility model are shown in the drawings to explain the principles of the present utility model. In the drawings,

[0019] Figure 1 is the water circuit diagram of the water purifier according to the first exemplary embodiment of the present utility model;

[0020] Figure 2 is the water circuit diagram of the water purifier according to the second exemplary embodiment of the present utility model;

[0021] Figure 3 is the water circuit diagram of the water purifier according to the third exemplary embodiment of the present utility model;

[0022] Figure 4 is the water circuit diagram of the water purifier according to the fourth exemplary embodiment of the present utility model;

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 10. Tap water inlet; 20. Water intake; 30. Drain outlet; 40. Flow meter; 100. Water purification tank; 101. Water inlet; 102. Water outlet; 103. Lower water level limit; 104. Upper water level limit; 200. Filtration assembly; 201. Raw water inlet; 202. Purified water outlet; 203. Concentrate water outlet; 210. Pre-filter element; 230. Concentrate water proportion valve; 310. First pipeline; 321. First pump; 322. Heating assembly; 323. Second pump; 330. Second pipeline; 500. Water inlet control valve; 600. Raw water pipeline. Detailed implementation

[0025] In the following description, a large number of details are provided to enable a thorough understanding of the present utility model. However, those skilled in the art can understand that the following description only exemplarily shows the preferred embodiments of the present utility model, and the present utility model can be implemented without one or more such details. In addition, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described in detail.

[0026] In order to thoroughly understand the implementation of the present utility model, detailed structures will be presented in the following description. Obviously, the implementation of the present utility model is not limited to the special details familiar to those skilled in the art. The preferred implementation of the present utility model is described in detail below. However, in addition to these detailed descriptions, the present utility model can also have other implementations.

[0027] An embodiment of the present utility model provides a water purifier. The water purifier according to the embodiment of the present utility model will be introduced in detail below with reference to the accompanying drawings.

[0028] As Figure 1 shown, the water purifier can have a tap water inlet 10, a water intake 20, and a drain outlet 30. Exemplarily but not limitatively, the tap water inlet 10 can be directly connected to the tap water pipe, or connected to the tap water faucet through a faucet adapter and a pipeline. The water intake 20 can be used to provide purified water to the user. Exemplarily, the water purifier can include a faucet, and the water intake 20 can be provided on the faucet. In another embodiment, the water purifier can include a quick connector, and the water intake 20 is the opening of the quick connector and can be connected to the faucet through a pipeline. In a preferred embodiment, the water purifier includes an intelligent faucet, and the water intake 20 can be provided on the intelligent faucet.

[0029] The water purifier may include a filtration component 200. The filtration component 200 can filter raw water to remove harmful bacteria, heavy metals and other impurities therein, and provide high-quality purified water for users. The filtration component 200 may include a raw water inlet 201 and a purified water outlet 202. The filtration component 200 may include a reverse osmosis filter element, a nanofiltration filter element, etc. Generally, a certain pressure is required when the above-mentioned filtration component 200 works. As described above, a booster pump is generally needed to increase the pressure of the raw water to achieve the rated water production flux. Although these filter elements can only output purified water at a rated flow rate under the rated raw water pressure, it does not mean that purified water cannot be produced under a raw water pressure lower than the rated value. Municipal tap water has a certain pressure. According to the Chinese national standard "Code for Design of Water Supply in Residential Areas" (GB 50015-2014), the water pressure of tap water in residential areas is not less than 0.2 MPa, and the standard water pressure of high-rise residential buildings is not less than 0.3 MPa. Since the implementation conditions vary in different regions, the water pressure of tap water may also be different. Generally, it can be considered that the lower limit of the water pressure of tap water is 0.1 MPa, and the upper limit will not be higher than 0.4 MPa. Taking the general water pressure of tap water being 0.2 - 0.3 MPa as an example, this water pressure is less than the water pressure that the booster pump can provide (0.6 - 0.7 MPa). Therefore, under the action of the tap water pressure, the filtration component 200 can output purified water with a flow rate approximately one-third of the rated flow rate.

[0030] The reverse osmosis filter element and the nanofiltration filter element will generate a certain proportion of concentrated water during operation. Therefore, the filtration component 200 including one or both of the above filter elements is also provided with a concentrated water outlet 203. The concentrated water outlet 203 is connected to the drain port 30 through a concentrated water proportioning valve 230. When the concentrated water proportioning valve 230 is in the closed state, it can maintain the pressure required for the operation of the filtration component 200 and allow a certain flow rate of concentrated water to pass through the concentrated water proportioning valve 230. The drain port 30 can communicate with the outside and is used to discharge this part of the concentrated water. Specifically, for example, the drain port 30 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. The user can reuse the collected concentrated water to save water. Exemplarily, when the concentrated water proportioning valve 230 is in the open state, the raw water can quickly pass through the filtration component 200 and the concentrated water proportioning valve 230, thereby flushing the filtration component 200.

[0031] The water purifier may further include a clean water tank 100 for storing the clean water output after being filtered by the filter assembly 200. The water pressure at the raw water inlet 201 is not greater than the water pressure at the tap water inlet 10. It can be considered that there is no component for increasing the water pressure on the pipeline from the raw water inlet 201 to the tap water inlet 10, such as the above-mentioned booster pump. In the case where there is no booster pump to boost the raw water, the raw water pressure reaching the filter assembly 200 cannot reach the rated working pressure of the filter assembly 200, and the efficiency of the filter assembly 200 in outputting clean water is low, resulting in a small clean water flow rate output by the water purifier. If the output clean water is directly provided to the user, it will increase the waiting time when the user draws water. The clean water tank 100 can store the small-flow clean water output by the filter assembly 200. When the user draws water, there is no need to wait for the water purifier to produce water, and the stored clean water is directly output from the clean water tank 100. The clean water tank 100 may have a water inlet 101 and a water outlet 102. The clean water tank water inlet 101 is communicated with the clean water outlet 202 of the filter assembly 200, so as to provide clean water to the clean water tank 100 when the water purifier produces water. The water outlet 102 may be communicated to the water intake port 20. Exemplarily but not limitatively, the water inlet 101 and the water outlet 102 may be installed at the bottom of the clean water tank 100, which can make the upper structure of the clean water tank 100 relatively simple, and can also make the clean water stored in the clean water tank 100 flow out by its own gravity. Relying solely on the self-gravity of the clean water in the clean water tank 100 to convey the clean water outwards may result in a small output clean water flow rate. In some embodiments below, a water pump may be provided downstream of the water outlet 102 of the clean water tank 100 to increase the output clean water flow rate and optimize the user experience.

[0032] The water purifier may further include a water level detection component for detecting the water level in the water purification tank 100. The water purifier may further include an inlet control valve 500. The inlet control valve 500 is provided on the raw water pipeline 600. When the water level in the water purification tank 100 is higher than or equal to the upper water level limit 104, the inlet control valve 500 closes. By closing the inlet control valve 500 when the water level in the water purification tank 100 reaches the upper water level limit 104, it is possible to avoid the water level being too high and causing the purified water to overflow from the water purification tank 100. Exemplarily but not restrictively, the water level detection component and the inlet control valve may be an integrated component, such as a float valve. The float valve may include a float part and a valve part. The float part may be arranged in the water purification tank 100, and the valve part may be arranged on the raw water pipeline 600. The float part can rise and fall with the water level, causing the valve part to act. Specifically, for example, when the water level in the water purification tank 100 decreases, the float valve connects the raw water pipeline 600. When the water level in the water purification tank 100 reaches the upper water level limit 104, the float valve cuts off the raw water pipeline 600. Exemplarily, the water level detection component may further include one or more of any suitable sensors such as an infrared water level gauge, a float water level gauge, an ultrasonic water level gauge, etc. In this case, the water purifier may further include a controller, the inlet control valve may include an electromagnetic valve, and the controller can control the inlet control valve according to the water level information of the water level detection component. This can also achieve automatic water replenishment.

[0033] In the above technical solution, by canceling the booster pump and only extracting purified water through the water pressure of tap water, the noise generated during the water production process of the water purifier can be significantly reduced. Since the water pressure of tap water usually cannot reach the rated working pressure of the filtration component 200, the filtration efficiency of the filtration component 200 is lower than that during normal operation. Therefore, a water purification tank 100 is provided to store the purified water output by the filtration component. When the water level in the water purification tank 100 decreases, the water purifier starts the inlet control valve 500 through the water level detection component and the inlet control valve 500, so that the pressurized tap water enters the filtration component 200 to produce water. In this way, it is usually possible to ensure that there is sufficient purified water in the water purification tank 100 when the user draws water. When the water level in the water purification tank 100 reaches the upper limit, the raw water pipeline 600 is cut off to prevent the purified water from overflowing. In short, the water purifier can quickly provide a relatively large amount of purified water to the user, and after the user draws water, it slowly replenishes water into the water purification tank 100 until it is full with very low noise.

[0034] During the actual use process, the user may pressurize the incoming tap water as a whole, or pressurize the pipeline connected to the tap water port 10 of the water purifier separately. In this case, the water pressure reaching the tap water port of the water purifier may be greater than the standard tap water pressure. However, in any case, the water purifier itself will not perform secondary pressurization on the water entering the tap water port 10, so the water purifier hardly generates noise during operation.

[0035] Reference Figure 2, the water purifier may further include a first pipeline 310. The water inlet of the first pipeline 310 is connected to the water outlet 102 of the water purification tank 100, and the water outlet of the first pipeline 310 is connected to the water intake port 20. When the user draws water, the purified water stored in the water purification tank 100 can be transported to the water intake port 20 through the first pipeline 310 to provide purified water for the user. Since the purified water in the water purification tank 100 usually has no pressure, under the action of the gravity of the purified water itself, the output flow rate of the purified water is usually small. The water purifier may further include a pumping assembly. The pumping assembly may include a first pump 321 provided on the first pipeline 310. Exemplarily, the first pump 321 may include any suitable water pump such as a diaphragm pump, a gear pump, a centrifugal pump, etc. The water inlet of the first pump 321 is connected to the water outlet 102 of the water purification tank 100 through the first pipeline 310, and the water outlet of the first pump 321 is connected to the water intake port 20. When the user draws water, the first pump 321 can pump out the purified water stored in the water purification tank 100 and pump it to the water intake port 20. In this way, purified water can be provided for the user with a larger flow rate. And even if the position of the water intake port 20 of the water purifier is higher than that of the water purification tank 100, the purified water can still be pumped to the water intake port 20 through the first pump 321. In some embodiments, the first pump 321 can also be used to adjust the output flow rate of the purified water.

[0036] The water purifier may further include a heating assembly 322. The heating assembly 322 is serially arranged on the first pipeline 310 and is located downstream of the first pump 321. The heating assembly 322 may include any suitable heating element such as a hot water tank, a thick film heater, an electromagnetic heater, etc. The hot water tank can heat the purified water and store the hot water therein. The thick film heater, the electromagnetic heater, etc. belong to instant heating elements. Taking the thick film heater as an example, the thick film heater can achieve instant heating to meet the needs of users for drinking hot water, making tea, making coffee, etc. that require the use of hot water. In some embodiments, by controlling the heating power of the heating assembly 322, the user can obtain water at different temperatures, increasing the practicability and convenience of the water purifier. The first pump 321 may be a flow control pump, and the flow control pump can accurately control and adjust the output flow rate within a given flow range. For a water purifier in which the heating assembly 322 includes an instant heating element, the flow control pump and the heating assembly 322 cooperate with each other to accurately control the water temperature of the output water flow by changing the water flow size and the heating power. Specifically, for example, when the temperature of the hot water output by the water purifier is relatively high, since the heating power of the heating assembly 322 is limited, the pumping flow rate of the flow control pump can be appropriately reduced so that the temperature of the output hot water meets the requirements.

[0037] In some exemplary embodiments, the output flow rate of the flow control pump, the heating power of the heating component 322, etc. can be manually controlled by, for example, a knob. In a preferred embodiment, the water purifier may further include a controller. The controller can control the output flow rate of the flow control pump and the heating power of the heating component 322. The flow control pump can also provide a stable water flow for the heating component 322, avoiding water flow fluctuations or interruptions, so as to ensure that the heating component 322 can continuously and uniformly heat the purified water, guarantee the stability and consistency of the heating effect, and prevent dry burning. In one embodiment, a temperature sensor may also be provided on or downstream of the heating component 322 for detecting the hot water temperature. The controller can feedback control the heating component 322 according to the hot water temperature, making the output hot water temperature more accurate and preventing dry burning.

[0038] In an exemplary embodiment, to ensure the accuracy of the water supply volume, the maximum flow rate of the flow control pump is about 1.1 L / min. As Figure 4 shown, the water purifier may further include a flow meter 40. The flow meter 40 can be serially arranged on the first pipeline 310 and downstream of the heating component 322. The flow meter 40 is used to detect the purified water flow rate on the first pipeline 310 and feed back the flow information to the controller. The controller can adjust the pumping flow rate of the flow control pump according to the flow information to further ensure the accuracy of the water supply flow rate. The controller can be built with electronic components such as a comparator, a register, a digital logic circuit, etc., or implemented by a processor chip such as a single-chip microcomputer, a microprocessor, a programmable logic controller (PLC), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic array (PLA), an application specific integrated circuit (ASIC), and its peripheral circuits.

[0039] Exemplarily, the water purifier may include an input component (not shown). The input component is used to receive the user's water intake operation and generate water intake information. The input component can include a touch screen, buttons, etc. Exemplarily, the input component can be provided on the smart faucet. Optionally, the input component may also include a receiver for receiving the mode selection operation input by the user through the user operation interface on their electronic device. In short, the input component can be used to receive the switching information input by the user. As described above, the water purifier may include a controller. The water intake information may include one or more pieces of information such as water volume information, flow rate information, desired water intake temperature, etc. The controller can control the flow control pump to change the flow rate based on the water intake information, or control the heating power of the heating component 322 based on the water intake information, or control the working duration of the flow control pump based on the water intake information, thereby controlling the water volume of the purified water, and can also control one or more of the above simultaneously. In this way, purified water in a desired state including the desired water volume, desired flow rate, and desired water temperature can be provided to the user.

[0040] As described above, to ensure precise flow control, the rated pumping flow of the flow control pump is about 1.1 L / min. When the user has a low requirement for the water intake flow, the heated purified water or unheated purified water can be taken through the first pipeline 310 of the first pump 321. When the user is not satisfied with the above flow rate, as Figure 4 shown, exemplarily, the water purifier may further include a second pipeline 330. The second pipeline 330 can be connected in parallel with the first pipeline 310 between the water outlet 102 of the water purification tank 100 and the water intake port 20. The pumping assembly may further include a second pump 323 provided on the second pipeline 330. The second pump 323 can also include one or more of water pumps such as a diaphragm pump, a gear pump, or a centrifugal pump. Among them, the rated pumping flow of the second pump 323 is greater than the rated pumping flow of the first pump 321. Specifically, for example, the rated flow of the second pump 323 can be not less than 2 L / min. Exemplarily rather than restrictively, the input assembly can also receive the user's water intake flow and generate flow information. The controller can select to control the first pump 321 or the second pump 323 to work by judging the flow information. In some specific scenarios, the controller can also control the first pump 321 and the second pump 323 to work simultaneously. Exemplarily, when the user takes cold water, the second pump 323 can be used to extract and pump it to the water intake port 20. At this time, the output flow rate can reach more than 2 L / min, realizing large-flow water supply. Return reference Figure 3 , exemplarily, in a scenario where there is no need to output hot water, the water purifier can only include the second pipeline 330.

[0041] The water purifier may further include a prompting component (not shown). The prompting component can be located on the smart faucet. Exemplarily, the prompting component can include any prompting method such as a sound prompt or a light prompt to prompt the user. When the water level in the water purification tank 100 is lower than or equal to the water level lower limit 103, the controller can control the prompting component to send a prompt message and at the same time control the pumping assembly to shut down. It is easy to understand that when the water level in the water purification tank 100 is too low, the purified water output flow rate is too small or even no water is output. Not only can the user not take water, but it will also cause the pumping assembly to run idly. The pumping assembly running idly may cause the motor to overheat and even be damaged. In the case where the water purifier includes a heating component, if water supply continues when the water level in the water purification tank 100 is too low, it may also cause the heating component 322 to dry burn. The controller controls the prompting component to send a prompt message to the user and at the same time controls the pumping assembly to shut down, which can protect the pumping assembly and the heating component 322, and at the same time give the user feedback so that the user clearly knows that water cannot be taken, improving the user experience.

[0042] The water purifier may further include a pre-filter 210. The pre-filter 210 may be serially disposed upstream of the filtration assembly 200. The pre-filter 210 may be single-stage or multi-stage, and may include one or more of an activated carbon filter element, a PP cotton filter element, and a filter element composed of a combination of multiple ones thereof. The pre-filter 210 is located before the filtration assembly 200 and can perform primary filtration on the water entering the filtration assembly 200 to filter out impurities with relatively large particles such as sediment and rust, so as to extend the service life of the filtration assembly 200. In some embodiments, a bypass (not shown) may be additionally provided at the water outlet of the pre-filter 210 to provide the user with domestic water after rough filtration, which can be used for washing vegetables and rinsing rice. The influence of the pre-filter 210 on the water flow rate and pressure can be almost ignored. Exemplarily, the pre-filter 210 may be located between the tap water inlet 10 and the inlet control valve 500. In this way, the pre-filter 210 can also protect the inlet control valve 500 to extend its service life.

[0043] Exemplarily, the filtration assembly 200 includes a reverse osmosis filter element. The pore size of the reverse osmosis filter element is one five-millionth (0.1 nanometer) of a human hair, and bacteria and viruses that are generally invisible to the naked eye are 10 times its size. Therefore, only water molecules and some mineral ions beneficial to the human body can pass through, and other impurities and heavy metals are discharged from the concentrated water outlet, providing high-quality purified water for the user. As described above, when the pressure of tap water is used as the working pressure of the filtration assembly 200, the water output flow rate is about one-third of the rated purified water flow rate. Therefore, using a small-flux filtration assembly with a water production capacity of no more than 400 gallons will further reduce the purified water flow rate of the water purifier, making it difficult to meet the user's usage requirements. And with the development of water purification technology, the price of large-flux filtration assemblies has gradually decreased to a range acceptable to users. Therefore, preferably, the water purifier uses a large-flux filtration assembly. In a specific embodiment, the water purifier uses a filtration assembly with a daily water production capacity of 600 gallons. Under the pressure of tap water, the daily water production capacity can reach 200 gallons. Cooperating with the purified water tank 100, it is equivalent to a water purifier with a small-flux filtration assembly equipped with a booster pump, which is sufficient to meet the user's needs.

[0044] In the description of the present invention, it should be understood that the orientation terms such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "perpendicular", "horizontal" and "top", "bottom", etc. generally refer to the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation terms "inner" and "outer" refer to the inside and outside relative to the contour of each component itself.

[0045] For ease of description, regional relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the regional positional relationship between one or more components or features shown in the figures and other components or features. It should be understood that regional relative terms not only include the orientation of the components described in the figures, but also different orientations during use or operation. For example, if the components in the attached drawings are inverted as a whole, the components "above other components or features" or "over other components or features" will include the situation where the components are "below other components or structures" or "under other components or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". In addition, these components or features can also be positioned at other different angles (such as rotated 90 degrees or other angles), and this article intends to cover all such situations.

[0046] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, components, assemblies and / or combinations thereof.

[0047] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily have to be used to 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 present application described here can be implemented in an order other than those illustrated or described here.

[0048] The present utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present utility model within the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. A water purifier has a tap water inlet, a water intake and a drain outlet, and is characterized in that The water purifier includes: A filtration component, which includes a raw water inlet, a purified water outlet, and a concentrated water outlet. The raw water inlet is connected to the tap water outlet through a raw water pipeline. The water pressure at the raw water inlet is not greater than the water pressure at the tap water outlet. The concentrated water outlet is connected to the drain outlet, and the drain outlet is connected to the outside. A water purification tank, the water inlet of which is connected to the purified water outlet, and the water outlet of which is connected to the water intake port. A water level detection component for detecting the water level in the water purification tank; and An inlet control valve, which is arranged on the raw water pipeline and closes when the water level is greater than or equal to the upper water level limit.

2. The water purifier according to claim 1, wherein, The water purifier further includes a first pipeline and a pumping component. The water inlet of the first pipeline is connected to the water outlet of the water purification tank, and the water outlet of the first pipeline is connected to the water intake port. The pumping component includes a first pump arranged on the first pipeline.

3. The water purifier according to claim 2, characterized in that, The water purifier further includes a heating component, which is connected in series on the first pipeline and is located downstream of the first pump. The first pump is a flow control pump.

4. The water purifier according to claim 3, characterized in that, The water purifier further includes: An input component for receiving the user's water intake operation and generating water intake information; A controller for controlling the pumping flow of the first pump and the heating power of the heating component based on the water intake information.

5. The water purifier according to claim 2, characterized in that, The water purifier further includes a second pipeline connected in parallel with the first pipeline between the water outlet of the water purification tank and the water intake port. The pumping component further includes a second pump arranged on the second pipeline. Among them, The rated pumping flow of the second pump is greater than the rated pumping flow of the first pump.

6. The water purifier according to claim 5, characterized in that, The water purifier further includes: An input component for receiving the user's water intake flow and generating flow information; A controller for controlling the operation of the first pump and / or the second pump based on the flow information.

7. The water purifier according to claim 2, characterized in that The water purifier further includes a prompting component and a controller. The controller is further used to control the pumping component to close and control the prompting component to send a prompting message when the water level is lower than or equal to the lower water level limit.

8. The water purifier according to claim 1, wherein The water purifier further includes a controller for controlling the inlet control valve to close when the water level is greater than or equal to the upper water level limit.

9. The water purifier according to claim 1, wherein The filtration component includes a reverse osmosis filter element.

10. The water purifier according to claim 1, wherein, The water purifier further includes a pre-filter, which is connected in series on the raw water pipeline, wherein: The pre-filter is located between the inlet control valve and the filtration component; and / or The pre-filter is located between the tap water outlet and the inlet control valve.

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