CN213895485U - Water purifier - Google Patents

Abstract

The utility model provides a water purifier, which comprises a main water pipeline communicated with a water inlet and a water outlet, wherein the main water pipeline is provided with a filtering component, the water purifier also comprises a water tank and a water storage pipeline, the first end of the water storage pipeline is communicated to the main water pipeline between the filtering component and the water outlet, the second end of the water storage pipeline is communicated to the water tank, the water storage pipeline is provided with a water suction pump for pumping water from the water tank, the water tank is provided with a microorganism detection device and a sterilization device which are electrically connected, and the microorganism detection device is used for detecting microorganisms in the water tank so as to generate a first electric signal; the sterilizing device is used for sterilizing when the density of the microorganisms in the water tank, which is represented by the first electric signal, exceeds a density threshold value. The water purifier can improve the working efficiency of the sterilization device, enables the sterilization time to be more targeted, can avoid frequent starting, can also be started in time, and ensures the water outlet quality of the water purifier.

Description

Water purifier

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a purifier.

Background

With the pursuit of the public for quality of life, the water quality is getting more attention. The water purifier is more and more popular because the purified water produced by the water purifier is fresher, more sanitary and safer.

In the existing water purifier, for various reasons, for example, in order to enable a user to receive water with better water quality at the first moment and meet the requirement of the user to quickly take a large amount of water, a water tank is often arranged in the water purifier. The water tank stores pure water prepared in advance. When a user takes water, the water suction pump works to pump water out of the water tank for the user to take. However, since water is stored in the water tank for a long time, it is easy to cause the propagation of microorganisms and the growth of bacteria. In order to avoid the above situations, a sterilization device is often arranged in the water tank to sterilize the water in the water tank at regular time, so as to improve the safety of the water body.

However, the sterilization of the water body by the sterilization apparatus is often performed regularly at regular intervals. Therefore, microorganisms or bacteria easily exceed standards, but the sterilization device is not started or stopped, so that the potential safety hazard of purified water drinking is caused; or when the sterilization is not needed, the sterilization device is started, so that the waste of resources is caused, and the service life of the sterilization device is influenced.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, there is provided a water purifier, comprising a main water pipeline communicating a water inlet and a water outlet, the main water pipeline being provided with a filter assembly, the water purifier further comprising a water tank and a water storage pipeline, a first end of the water storage pipeline being communicated to the main water pipeline between the filter assembly and the water outlet, a second end of the water storage pipeline being communicated to the water tank, the water storage pipeline being provided with a water suction pump for drawing water from the water tank, the water tank being provided with a microorganism detection device and a sterilization device electrically connected, the microorganism detection device being configured to detect microorganisms in the water tank to generate a first electrical signal; the sterilizing device is used for sterilizing the water in the water tank when the density of the microorganisms in the water tank, which is represented by the first electric signal, exceeds a density threshold value.

Therefore, the water purifier with the sterilizing device can sterilize the water in the water tank, and avoids breeding of bacteria and microorganisms in the water tank. Furthermore, the microorganism detection device is arranged, so that the working efficiency of the sterilization device can be improved, and the sterilization time of the water body in the water tank is more pointed. On one hand, the frequent starting of the sterilization device when the water in the water tank is not required to be sterilized is avoided, and the service life of the sterilization device is prolonged; on the other hand, when the water in the water tank needs to be sterilized, the sterilizing device can be started in time, and the water outlet quality of the water purifier is further ensured.

Illustratively, the water purifier also comprises a water return pipeline, a first end of the water return pipeline is communicated with the water tank, a second end of the water return pipeline is communicated with the main water pipeline between the water inlet and the filtering component, a water return electromagnetic valve is arranged on the water return pipeline, and the water return electromagnetic valve is conducted when the density of the microorganisms represented by the first electric signal exceeds a density threshold value.

Because microorganism or bacterium also can breed in the inside pipeline in the water purifier of main water pipeline, through the circulation flow of water, can make sterilizing equipment carry out the operation of disinfecting to more waters in the purifier, and then make the water in the water purifier obtain fully disinfecting. In addition, impurities generated by the sterilization operation of the sterilization device can be filtered by the filtering component on the main water pipeline, so that the water outlet quality of the water purifier is further improved.

Illustratively, the filter assembly includes a reverse osmosis filter element, a booster pump is disposed in the main water line between the water inlet and the reverse osmosis filter element, the second end of the water return line communicates with the main water line between the water inlet and the booster pump, and the booster pump is activated when the density of the microorganisms indicated by the first electrical signal exceeds a density threshold.

The water purifier provided with the reverse osmosis filter element and the booster pump has more ideal water purifying effect. In the process of sterilizing the water tank, the booster pump also has the function of pumping water in the water tank out of the water return pipeline and pressing the water into the main water pipeline for re-filtering, so that the remains of microorganisms in the water tank are filtered, the circulation of the water in the water tank is improved, and the water in the water purifier is sterilized more fully.

Illustratively, the water purifier also comprises a controller, the controller is electrically connected with the booster pump, the water return solenoid valve, the microorganism detection device and the sterilization device, and is used for receiving a first electric signal from the microorganism detection device, determining whether the microorganism density represented by the first electric signal exceeds a density threshold value, and controlling the booster pump, the sterilization device and the water return solenoid valve according to whether the microorganism density represented by the first electric signal exceeds the density threshold value.

Therefore, the water purifier with the controller can better control the booster pump, the water return electromagnetic valve, the microorganism detection device, the sterilization device and the like, and can also adjust and set the density threshold value through the controller, so that the logic relation among the devices in the water purifier is simplified.

The water tank is further provided with a liquid level detector, the liquid level detector is electrically connected with the controller, the liquid level detector is used for detecting the liquid level in the water tank so as to generate and send a second electric signal to the controller, the controller is further used for determining whether the liquid level represented by the second electric signal exceeds a liquid level threshold value, and the controller controls the booster pump, the sterilization device and the water return solenoid valve to further determine whether the liquid level represented by the second electric signal exceeds the liquid level threshold value.

The water purifier with the liquid level detector can detect the liquid level condition in the water tank, can avoid the water tank water shortage condition, still starts the sterilizing equipment and carries out unnecessary sterilization operation, and therefore, the service life of the sterilizing equipment is prolonged.

Exemplarily, a first one-way valve is further arranged on the water return pipeline, a water inlet of the first one-way valve is communicated with the water return electromagnetic valve, and a water outlet of the first one-way valve is communicated with the main water pipeline.

Therefore, when the water purifier is in a sterilization mode, in the process of performing circulating filtration on water in the water tank, raw water which is not filtered can be prevented from directly flowing into the water tank from the water inlet to pollute the water in the water tank.

Illustratively, a water inlet electromagnetic valve is further arranged on the main water pipeline between the water inlet and the water return pipeline.

When the water purifier enters a sterilization mode, the water inlet electromagnetic valve is closed, so that the water in the water tank is prevented from being polluted due to the mixing of raw water and water in the water tank. When the water purifier enters a standby state, the water inlet electromagnetic valve can be also stopped, so that the phenomenon that raw water continuously flows into a main water pipeline and is discharged from a waste water port of the filtering assembly to cause long-flow of waste water and waste of water resources is avoided.

Illustratively, the microorganism detection apparatus includes a conductivity detection element for detecting a conductivity of the water within the tank, wherein the first electrical signal is indicative of a microorganism density exceeding a density threshold when the conductivity is above a conductivity threshold.

The water purifier with the setting can rapidly and accurately detect the density of microorganisms in water, so that the microorganism detection device and the water purifier can be well integrated.

Illustratively, the germicidal device is an ultraviolet germicidal lamp.

The sterilizing device is an ultraviolet sterilizing lamp, can have high-efficiency sterilizing capability, and can sterilize water bodies in comparison with devices such as an ozone generator, and the like, the ultraviolet rays are in a non-contact type, the safety is higher, and the water bodies cannot be polluted.

Illustratively, a second one-way valve is further arranged on the main water pipeline between the filtering assembly and the water storage pipeline, a water inlet of the second one-way valve is communicated with the filtering assembly, and a water outlet of the second one-way valve is communicated with the first end of the water storage pipeline.

The second one-way valve can prevent water in the water tank and the vicinity of the water outlet device from flowing back to the filter assembly from the water outlet of the filter assembly. Thereby prevent that the purifier from under long-time standby state, the backward flow of water causes the pollution to filtering component, avoided the user to connect when next water intaking and get the higher straight drinking water of TDS.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic water path diagram of a water purifier according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. a water purifier; 101. a water inlet; 102. a water outlet; 200. a main water line; 210. a filter assembly; 220. a booster pump; 230. a water inlet electromagnetic valve; 240. a second one-way valve; 300. a water storage pipe; 301. a first end of a water storage line; 302. a second end of the water storage line; 310. a water tank; 320. a water pump; 330. a microorganism detection device; 340. a sterilizing device; 350. a liquid level detector; 400. a water return pipeline; 401. a first end of a return line; 402. a second end of the return line; 410. a water return electromagnetic valve; 420. a first one-way valve.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

As shown in fig. 1, the present invention provides a water purifier 100 having a water inlet 101 and a water outlet 102. Typically, the water inlet 101 may be connected to a source of water such as a municipal water line. The water outlet 102 may be used to communicate with a water outlet device, which may include a mechanical faucet, an electrically controlled faucet, and a pipeline machine. The water purifier 100 includes a main water line 200 communicating the water inlet 101 and the water outlet 102. The main water line 200 is provided with a filter assembly 210. The water flowing in from the water inlet 101 is filtered by the filter assembly 210 to become pure water, and flows out through the water outlet 102.

The water purifier 100 further includes a water storage line 300 and a water tank 310. A first end 301 of the water storage line communicates with the main water line 200 between the filter assembly 210 and the water outlet 102, and a second end 302 of the water storage line communicates with the water tank 310. The water tank 310 is used to store pure water prepared in advance by the water purifier 100. The water storage line 300 is provided with a suction pump 320, and the suction pump 320 is used to draw water from the water tank 310. The arrangement of the water tank 310 and the water storage pipeline 300 can reduce the time for the user to wait for the water purifier 100 to prepare the pure water, and can also provide the possibility for supplying the pure water with better water quality. The filtering process by the filtering component 210 and the water taking process by the water pump 320 are well known to those skilled in the art, and the detailed principle will not be described in detail.

The water tank 310 is further provided with a microorganism detection means 330 and a sterilization means 340 which are electrically connected, directly or indirectly.

The microorganism detection device 330 is used for detecting microorganisms in the water tank 310 to generate a corresponding first electric signal. In other words, the first electrical signal can represent the density of the microorganisms present in the water tank 310. The microorganism detection apparatus 330 may be various, such as an apparatus for detecting by spectroscopy, a chemical agent, or the like.

It will be appreciated that the change in microorganism in the water in the tank 310 is relatively slow and that the microorganism density is continuously changing. In order to improve the detection efficiency, the detection by the microorganism detection apparatus 330 may not be continuous in real time but performed at a specific frequency, for example, once every 5 minutes.

Illustratively, the microbial detection apparatus 330 includes a conductivity detector. The conductivity detecting member is used to detect the conductivity of the water in the water tank 310. Wherein the first electrical signal is indicative of a density of the microorganisms exceeding a density threshold when the conductivity is above a conductivity threshold.

In ecology, electrical conductivity is the ability of a liquid, expressed numerically, to conduct electrical current. Units may be expressed in siemens per meter (S/m). The microorganism detection apparatus 330 can detect the density of microorganisms in the liquid according to the principle that the microorganisms are metabolized by the macromolecular substances (such as protein, polypeptide, carbohydrate, and the like) with low conductivity during the growth process to generate the decomposed substances with low molecular charges, so that the conductivity is changed. The relative conductivity change can be measured by a combination of measuring the conductance (M value) and the electrode conductance (E value). The E value measurement method is particularly suitable for selective enrichment of some high-salinity (high conductivity). For microorganisms such as yeast and mold, which have difficulty in measuring the change in conductance, a false negative is often observed in direct conductance measurements, and the growth of the microorganism can be reflected by measuring the change in conductance after potassium hydroxide (KOH) absorbs carbon dioxide produced by metabolism of the microorganism.

The determination of the density of microorganisms in water by the detection of electrical conductivity is known in the art. The water purifier 100 with the arrangement can rapidly and accurately detect the density of microorganisms in water, so that the microorganism detection device 330 and the water purifier 100 can be well integrated.

The sterilization device 340 is configured to sterilize the water in the water tank 310 when the density of the microorganisms in the water tank 310, which is indicated by the first electrical signal, exceeds a density threshold, so that the water purifier 100 enters a sterilization mode. The density threshold may be a factory default value, or a value preset by a user through a human-computer interaction component of water purifier 100. The sterilization device 340 may be various, such as an ozone generator.

The activation of the sterilizing device 340 is controlled in accordance with the first electric signal generated by the microorganism detection device 330. The time duration of each operation of the sterilization device 340 may be a preset value, i.e., a fixed time duration of each sterilization. The sterilization device 340 may be turned off according to the first electric signal generated by the microorganism detection device 330. I.e., the time period for which the sterilizing device 340 is opened is controlled according to the density value of the microorganisms in the water tank 310. When the density of the microorganisms exceeds the density threshold, the sterilization device 340 starts sterilization. When the density of the microorganisms decreases below the density threshold, the sterilizing device 340 stops sterilizing.

Illustratively, the sterilization device 340 may be an ultraviolet sterilization lamp. Ultraviolet light is known to destroy the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in microbial cells, causing death of growing cells and death of regenerating cells, and to sterilize and disinfect objects. Therefore, the sterilization device 340 can have high-efficiency sterilization capability for the ultraviolet sterilization lamp, and compared with an ozone generator and other devices for sterilizing the water body, the ultraviolet sterilization lamp is non-contact, has higher safety, and cannot pollute the water body.

Accordingly, water purifier 100 having sterilizing device 340 can sterilize water in water tank 310, and prevent bacteria and microorganisms from growing in water tank 310. Further, the microorganism detection device 330 is arranged, so that the working efficiency of the sterilization device 340 can be improved, and the sterilization time of the water body in the water tank 310 is more targeted. On one hand, the frequent starting of the sterilizing device 340 when the water in the water tank does not need to be sterilized is avoided, and the service life of the sterilizing device 340 is prolonged; on the other hand, when the water in the water tank needs to be sterilized, the sterilizing device 340 can be started in time, and the water outlet quality of the water purifier 100 is further ensured.

Illustratively, the water purifier 100 further comprises a water return line 400. A first end 401 of the return line communicates with the tank 310 and a second end 402 of the return line communicates with the main water line 200 between the water inlet 101 and the filter assembly 210. The water return pipeline 400 is provided with a water return electromagnetic valve 410, and the water return electromagnetic valve 410 is conducted when the density of the microorganisms in the water tank 310, which is represented by the first electric signal, exceeds a density threshold value. When the return solenoid valve 410 is turned on, water may circulate between the return line 400, a portion of the main water line 200, the reservoir line 300, and the tank 310. It can be understood that microorganisms or bacteria may be bred in the internal pipeline of the water purifier 100, such as the main water pipeline 200, and the water can be sterilized by the sterilizing device 340 in the water purifier 100 through the circulation of the water, so that the water in the water purifier 100 can be sufficiently sterilized. In addition, the impurities generated by the sterilization operation of the sterilization device 340 can be filtered by the filter assembly 210 on the main water pipeline 200, thereby further improving the quality of the outlet water of the water purifier 100.

Illustratively, a first check valve 420 is further disposed on the water return line 400. The water inlet of the first one-way valve 420 is communicated with the water return electromagnetic valve 410, and the water outlet of the first one-way valve 420 is communicated with the main water pipeline 200. I.e., the water in the return line 400 may flow only from the water tank 310 to the main water line 200. In this way, in the sterilization mode, during the circulation filtering process performed on the water in the water tank 310, it is possible to prevent the unfiltered raw water from directly flowing into the water tank 310 from the water inlet 101 to pollute the water in the water tank 310.

Illustratively, the filter assembly 210 includes a reverse osmosis cartridge, and a booster pump 220 is also provided in the main water line 200 between the water inlet 101 and the reverse osmosis cartridge. A second end 402 of the return line communicates with the main water line 200 between the water inlet 101 and the booster pump 220. The booster pump 220 is activated when the density of microorganisms in the water tank 310, as indicated by the first electrical signal, exceeds a density threshold. The function of the booster pump 220 in the process of producing water in the water purifier 100 is to increase the pressure of water in the downstream pipeline and the device, so that water with a certain pressure passes through the reverse osmosis filter element, thereby producing pure water. The water purifier provided with the reverse osmosis filter element and the booster pump 220 has more ideal water purifying effect. In the process of sterilizing the water tank 310, the booster pump 220 also has the function of pumping out the water in the water tank 310 through the water return pipeline 400, pressing the water into the main water pipeline 200, and re-filtering, so as to filter the remains of microorganisms in the water tank 310, and simultaneously improve the water circulation in the water tank 310, so that the water in the water purifier 100 can be sterilized more fully.

Illustratively, water purifier 100 also includes a controller. The controller is electrically connected with the booster pump 220, the water return electromagnetic valve 410, the microorganism detection device 330 and the sterilization device 340. The controller may receive the first electrical signal sent by the microorganism detection apparatus 330, determine whether the microorganism density indicated by the first electrical signal exceeds a density threshold, and further control the booster pump 220, the sterilization apparatus 340, and the water return solenoid valve 410 according to the determination result. When the microorganism density represented by the first electric signal is higher than the density threshold, the controller controls the booster pump 220 to start, the water return solenoid valve 410 is conducted, and the sterilizing device 340 is opened. The water in the water tank 310 is sterilized while the booster pump 220 and the reverse osmosis cartridge perform a re-circulation filtering of the water. When the microorganism detection apparatus 330 detects that the density of microorganisms in the water tank is lower than the density threshold, the water purifier 100 may be controlled to stop the sterilization mode. The sterilization mode is stopped, the controller can control the booster pump 220 to stop working, the water return solenoid valve 410 is cut off, and the sterilization device 340 is closed. Of course, the controller only controls the end of the sterilization mode in the process, if the current user opens the water outlet device to take water at the moment, the booster pump 220 is still started, and the water purifier enters the water production mode, that is, the priority of the water production mode of the water purifier 100 is higher than that of the sterilization mode.

Therefore, the water purifier 100 with the controller can better control the booster pump 220, the water return electromagnetic valve 410, the microorganism detection device 330, the sterilization device 340 and the like, and can also adjust and set the density threshold value through the controller, thereby simplifying the logical relationship among the devices in the water purifier 100.

In the embodiment shown in fig. 1, both the reverse osmosis cartridge and the booster pump 220 coexist with the return line 400. It is to be understood that this coexistence state is not essential. In other words, in one water purifier, there may be only the reverse osmosis filter element and the booster pump 220, and there is no return water line 400; of course, it is also possible that only the return line 400 is present, and that the reverse osmosis cartridge and the booster pump 220 are not present.

The water tank 310 is also illustratively provided with a level detector 350. The level detector 350 is electrically connected to the controller. The level detector 350 is used to detect the level of liquid in the water tank 310 to generate and send a second electrical signal to the controller. In other words, the second electrical signal can represent the current level of liquid within the water tank 310. The controller is further configured to determine whether the liquid level indicated by the second electrical signal exceeds a liquid level threshold. Further, the controller controls the booster pump 220, the sterilizing device 340 and the water return solenoid valve 410 according to whether the density of the microorganisms indicated by the first electric signal exceeds the density threshold value or not, and also according to whether the liquid level indicated by the second electric signal exceeds the liquid level threshold value or not. In one embodiment, the controller controls the water purifier 100 to enter the sterilization mode according to the above judgment of the first electrical signal when the liquid level in the water tank 310 is higher than the liquid level threshold. If the liquid level in the water tank 310 is lower than the liquid level threshold, the water purifier 100 will not be controlled to enter the sterilization mode even if the microorganism density indicated by the first electrical signal generated by the microorganism detection apparatus 330 is higher than the density threshold. That is, in this embodiment, the liquid level in the water tank 310 is higher than the liquid level threshold value, which is a necessary condition for entering the sterilization mode.

Therefore, the water purifier 100 with the liquid level detector 311 can detect the liquid level in the water tank 310, and can avoid unnecessary sterilization operation by still starting the sterilization device 340 under the condition that the water tank 310 is lack of water. Thereby, the life span of the sterilizing device 340 is extended.

Illustratively, a water inlet solenoid valve 230 is further provided on the main water line 200 between the water inlet 101 and the water return line 400. The water inlet solenoid valve 230 may be a main valve of the main water line 200 of the water purifier 100. When water is produced, the water inlet solenoid valve 230 is turned on, and raw water enters the main water pipe 200. When the water purifier enters the sterilization mode, the water inlet solenoid valve 230 is closed, so that the water in the water tank 310 is prevented from being polluted due to the mixing of raw water and water in the water tank 310. For the case that the filter assembly includes the reverse osmosis filter element, when the water purifier 100 enters the standby state, the water inlet solenoid valve 230 may also be closed, so as to prevent the raw water from continuously flowing into the main water pipeline 200 and being discharged from the waste water outlet of the reverse osmosis filter element, which may cause the long flow of waste water and waste of water resources.

A second one-way valve 240 is also illustratively provided in the main water line 200 between the filter assembly 210 and the reservoir line 300. The water inlet of the second check valve 240 is communicated with the filtering assembly 210, and the water outlet of the second check valve 240 is communicated with the first end 301 of the water storage pipeline. The second check valve 240 may prevent water in the water tank 310 and the vicinity of the water outlet device from flowing back into the filter assembly 210 from the water outlet of the filter assembly 210. Thereby prevent that purifier 100 from causing the pollution to filtering component 210 under long-time standby state, the backward flow of water, avoided the user when next water intaking, connect to get the higher straight drinking water of TDS.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words 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, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A water purifier comprises a main water pipeline communicated with a water inlet and a water outlet, wherein the main water pipeline is provided with a filtering component, the water purifier also comprises a water tank and a water storage pipeline, a first end of the water storage pipeline is communicated with the main water pipeline between the filtering component and the water outlet, a second end of the water storage pipeline is communicated with the water tank, the water storage pipeline is provided with a water suction pump, and the water suction pump is used for sucking water from the water tank,

the water tank is provided with a microorganism detection device and a sterilization device which are electrically connected,

the microorganism detection device is used for detecting microorganisms in the water tank to generate a first electric signal;

the sterilizing device is used for sterilizing the water in the water tank when the density of the microorganisms in the water tank represented by the first electric signal exceeds a density threshold value.

2. The water purifier of claim 1, further comprising a return line, a first end of the return line being in communication with the water tank, a second end of the return line being in communication with the main water line between the water inlet and the filter assembly, the return line having a return solenoid valve disposed thereon, the return solenoid valve being turned on when the density of the microorganisms indicated by the first electrical signal exceeds the density threshold.

3. The water purifier of claim 2, wherein said filter assembly includes a reverse osmosis filter element, a booster pump is disposed in a main water line between said water inlet and said reverse osmosis filter element, a second end of said water return line communicates with said main water line between said water inlet and said booster pump, and said booster pump is activated when a density of microorganisms indicated by said first electrical signal exceeds said density threshold.

4. The water purifier of claim 3, further comprising a controller electrically connected to the booster pump, the water return solenoid valve, the microbial detection device, and the sterilization device, the controller configured to receive the first electrical signal from the microbial detection device and determine whether a microbial density indicated by the first electrical signal exceeds the density threshold, and to control the booster pump, the sterilization device, and the water return solenoid valve based on whether the microbial density indicated by the first electrical signal exceeds the density threshold.

5. The water purifier as recited in claim 4, wherein the water tank is further provided with a liquid level detector electrically connected to the controller, the liquid level detector being configured to detect a liquid level within the water tank to generate and send a second electrical signal to the controller, the controller being further configured to determine whether the liquid level indicated by the second electrical signal exceeds a liquid level threshold, the controller controlling the booster pump, the sterilization device, and the water return solenoid valve further based on whether the liquid level indicated by the second electrical signal exceeds the liquid level threshold.

6. The water purifier as recited in claim 2, wherein said water return pipeline is further provided with a first check valve, a water inlet of said first check valve is communicated with said water return electromagnetic valve, and a water outlet of said first check valve is communicated with said main water pipeline.

7. The water purifier as recited in claim 2, wherein a water inlet solenoid valve is further disposed on the main water line between said water inlet and said water return line.

8. The water purifier according to any one of claims 1 to 6, wherein said microorganism detection means comprises an electrical conductivity detection element for detecting an electrical conductivity of the water in said tank, wherein said first electrical signal is indicative of a microorganism density exceeding a density threshold when said electrical conductivity is above said conductivity threshold.

9. The water purifier according to any one of claims 1-6, wherein said sterilizing device is an ultraviolet sterilizing lamp.

10. The water purifier as claimed in any one of claims 1 to 6, wherein a second one-way valve is further disposed in the main water line between said filter assembly and said water storage line, an inlet of said second one-way valve is connected to said filter assembly, and an outlet of said second one-way valve is connected to a first end of said water storage line.

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