CN215102145U

CN215102145U - Water purifier

Info

Publication number: CN215102145U
Application number: CN202023101469.4U
Authority: CN
Inventors: 单燕萍; 朱萍萍
Original assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Current assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-12-10
Anticipated expiration: 2030-12-21

Abstract

The utility model provides a water purifier. The water purifier comprises a main water pipeline and a concentrated water pipeline, wherein a booster pump, a pressure detector and a reverse osmosis filter element are sequentially arranged on the main water pipeline along the water flow direction, and a drainage electromagnetic valve is arranged on the concentrated water pipeline; the water discharge electromagnetic valve is opened for a first time period according to an electric signal indicating that water taking is stopped; the booster pump is electrically connected to the pressure detector and stops operating when the line pressure detected by the pressure detector rises to not less than a predetermined first pressure value. The purifier can control the booster pump stop work through pressure detector, and is more intelligent. Not only ideally ensures that a user can take water immediately, but also does not damage the reverse osmosis filter element.

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.

Most of water purifiers in the prior art filter raw water through a reverse osmosis filter element. When the filtration of the water purifier is finished, the booster pump stops working, and the water purifier enters a standby state. Since the booster pump stops operating, the pre-membrane pressure of the reverse osmosis filter element in the standby state is significantly lower than the pre-membrane pressure when the reverse osmosis filter element is operating. When the user gets water next time, the booster pump starts, needs improve the pressure in the reverse osmosis filter core earlier, just can prepare pure water, so the user need wait for a period of time when getting water.

In order to avoid the phenomenon, some water purifiers control the booster pump to continue to work for a certain period of time when the filtration is finished. During the time period when the booster pump is out of operation for a prolonged period of time, the pressure in the reverse osmosis filter element rises. Therefore, when a user gets water next time, the time for waiting for the booster pump to increase the pressure in the reverse osmosis filter element can be saved, and the user can receive the water immediately. However, the water purifier controls the booster pump to stop working in a delayed manner based on time to increase the pressure in the reverse osmosis filter element, so that the expected effect is difficult to achieve, and the reverse osmosis filter element is sometimes damaged.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems in the prior art, according to one aspect of the present invention, there is provided a water purifier, comprising a main water pipeline communicated between a water inlet and a water intake of the water purifier, wherein a booster pump and a reverse osmosis filter element are sequentially arranged on the main water pipeline along a water flow direction, the water purifier further comprises a concentrated water pipeline communicated between a concentrated water port of the reverse osmosis filter element and a water outlet of the water purifier, the water purifier further comprises a pressure detector and a water discharge electromagnetic valve, and the pressure detector is arranged on the main water pipeline between the booster pump and the reverse osmosis filter element; the water discharge electromagnetic valve is arranged on the concentrated water pipeline; wherein the drain solenoid valve is opened for a first period of time in response to an electrical signal indicative of a cessation of water intake; the booster pump is electrically connected to the pressure detector and stops operating when the line pressure detected by the pressure detector rises to not less than a predetermined first pressure value.

The purifier that has this setting can wash the reverse osmosis filter core when stopping the water intaking, has guaranteed the cleanliness factor of filter membrane promptly, has guaranteed again that the TDS value of the first section water that the user accepted is lower. A pressure detector is arranged between the booster pump and the reverse osmosis filter element, and the working time of the booster pump after the water taking is finished is controlled according to the result of the pressure detector. This compares and controls the prior art of the stop work of booster pump based on the time, and is more intelligent, can ensure that the pressure of reverse osmosis filter core is after reaching first pressure predetermined value, and the purifier reenters standby phase. Therefore, the user can get water instantly. Moreover, the damage to the reverse osmosis filter element caused by the fact that the booster pump continues to work when the pressure in the reverse osmosis filter element reaches the first preset pressure value is avoided.

Illustratively, the water purifier further comprises: the controller is electrically connected with the booster pump, the pressure detector and the water discharge electromagnetic valve; the controller is used for controlling the drainage electromagnetic valve to be opened for a first time period when receiving an electric signal indicating that water taking is stopped; and when the pipeline pressure detected by the pressure detector is increased to be not lower than a first pressure preset value, controlling the booster pump to stop working.

Through setting up the controller, can simplify the logical relation between each device in the purifier, improve the operating stability of purifier.

Illustratively, the water purifier further comprises: the water taking control device is arranged on a main water pipeline at the downstream of the reverse osmosis filter element and is electrically connected with the controller, and the water taking control device is used for generating and sending an electric signal for indicating the stop of water taking to the controller.

The water purifier with the water taking control device can independently send the electric signal for indicating the stop of water taking to the controller, so that the control of the water purifier is more flexible, the control method is more various, and the application range of the water purifier is enlarged.

Illustratively, the water intake control device comprises a second pressure switch, and a second pressure preset value of the second pressure switch is smaller than the first pressure preset value; and a second check valve is also arranged on the main water pipeline, a water inlet of the second check valve is communicated with a pure water port of the reverse osmosis filter element, and a water outlet of the second check valve is communicated with a water inlet of the second pressure switch.

In the flushing process, due to the existence of the second check valve, the pressure in the pipeline where the second pressure switch is located is not reduced due to the opening of the drainage electromagnetic valve, but the original pressure is kept; and the second pressure preset value of the second pressure switch is smaller than the first pressure preset value, so that the control logic of the water purifier can be clear, and the stable work of the water purifier can be ensured.

Illustratively, the water intake control device is an electrically controlled faucet disposed at the water intake.

The electric control faucet can be regarded as an aggregate of the water outlet device and the water taking control device, the integration level of the water taking control device and the water outlet device can be improved, water leakage points on a water path are reduced, and water leakage risks are reduced.

Illustratively, the pressure detector is a first pressure switch.

The pressure detector is realized by the first pressure switch, so that the water purifier is low in cost and stable in work.

Exemplarily, a first check valve is further arranged on the main water pipeline, a water inlet of the first check valve is communicated with a water outlet of the booster pump, and a water outlet of the first check valve is communicated with a water inlet of the pressure detector.

The first check valve is arranged between the booster pump and the pressure detector, so that the pressure maintaining time can be prolonged, and the pressure maintaining effect is improved. Therefore, the user can obtain the pure water at first time.

Illustratively, the purifier still includes the dense water combination valve, and the dense water combination valve sets up on the dense water pipeline, and the dense water combination valve includes waste water ratio device and dense water solenoid valve.

The water purifier with the concentrated water combination valve can freely switch the water production and the flushing of the reverse osmosis filter element, and is simple in control mode and easy to realize.

Illustratively, the water purifier further comprises a water inlet solenoid valve disposed on the main water line between the water inlet and the booster pump.

The water inlet electromagnetic valve can cut off a main water pipeline at the upstream of the booster pump when the water purifier is in standby, so that the phenomenon of ion diffusion in water can be avoided when the water purifier is in standby for a long time, and unfiltered raw water is prevented from moving towards the reverse osmosis filter element to cause the water in the reverse osmosis filter element and a downstream water pipeline to be polluted.

Illustratively, the water purifier further comprises: the prepositive filter element is arranged on a main water pipeline between the water inlet electromagnetic valve and the booster pump.

The preposed filter element can carry out primary filtration on raw water entering the booster pump, and can block silt, scrap iron, organisms and the like in the raw water at the upper part of the preposed filter element, so that impurities are prevented from damaging the booster pump and the reverse osmosis filter element at the lower part of the preposed filter element.

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 intake; 103. a water outlet; 200. a main water line; 210. a booster pump; 220. a reverse osmosis filter element; 221. a raw water port; 222. a pure water port; 223. a dense water port; 230. a water inlet electromagnetic valve; 240. a front filter element; 300. a concentrated water pipeline; 310. a water discharge electromagnetic valve; 320. a concentrated water combination valve; 321. a wastewater ratio device; 322. a concentrated water electromagnetic valve; 410. a first pressure switch; 420. a second pressure switch; 510. a first check valve; 520. a second check 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 described above, in the conventional water purifier, the booster pump is controlled to stop operating with delay based on time to reduce the waiting time for water collection by the user. However, in different application scenarios, the water pressure of the pipeline where the water purifier is located is different; even for the same water purifier, the pipeline pressure may be unstable, i.e. vary with time. Therefore, for the existing water purifier, sometimes, the booster pump stops working when the pressure in the reverse osmosis filter element does not reach a desired pressure preset value, so that a user still needs to wait for a period of time when receiving water next time, and the expected effect cannot be achieved; sometimes, the pressure in the reverse osmosis filter element reaches the expected preset pressure, but the booster pump still continues to work due to the fact that the preset time period is not reached, and the reverse osmosis filter element is damaged, so that the service life of the reverse osmosis filter element is shortened.

Fig. 1 shows a water purifier 100 according to an embodiment of the present invention. The water purifier 100 has a water inlet 101 and a water intake 102. Typically, the water inlet 101 may be used to communicate with a source of water such as a municipal water line. The intake 102 may be adapted to communicate with an outlet. The water outlet device can comprise a faucet, a pipeline machine and the like. The main water pipe 200 is connected to the water inlet 101 and the water intake 102 of the water purifier, and the main water pipe 200 is provided with a booster pump 210 and a reverse osmosis filter element 220 in sequence along the water flow direction from the water inlet 101 to the water intake 102. The booster pump 210 is used to supply water to the reverse osmosis cartridge 220. The reverse osmosis cartridge 220 is used to filter the passing water stream.

The water purifier 100 further comprises a concentrate line 300. The concentrate line 300 is connected between the concentrate outlet 223 of the reverse osmosis cartridge 220 and the water outlet 103 of the water purifier 100. The concentrate line 300 is used to discharge the concentrate, which is not filtered by the reverse osmosis cartridge 220, out of the water purifier 100.

The water purifier also includes a pressure detector and a drain solenoid valve 310. The pressure detector may send an electrical signal based on the pressure in the line in which it is located. A pressure detector is provided on the main water line 200 between the booster pump 210 and the reverse osmosis cartridge 220. The drain solenoid valve 310 is provided on the concentrate line 300. The drain solenoid valve 310 may have two states, open and closed, and when in the closed state, the line is completely closed. Wherein the drain solenoid valve 310 may be opened for a first time period T1 based on the taking of an electrical signal indicating the cessation of water intake. The booster pump 210 is electrically connected to the pressure detector, and stops operating when the line pressure detected by the pressure detector rises to not less than a first predetermined pressure value P1. It will be appreciated that the booster pump 210 and the pressure detector may each be electrically connected directly or indirectly via other means.

Illustratively, the water purifier may include an electrically controlled faucet disposed at the intake 102. The electrically controlled faucet may be electrically connected to the booster pump. When the electrically controlled faucet is turned on, the booster pump 210 is activated. The booster pump 210 supplies water to the reverse osmosis filter element 220, and the reverse osmosis filter element 220 filters the water flowing therethrough. The drain solenoid valve 310 is in a closed state to ensure that the pressure inside the reverse osmosis filter element 220 is at a high level, thereby ensuring that the reverse osmosis filter element 220 can smoothly perform a filtering operation. The user may access filtered pure water via an electrically controlled faucet. In the process, the water purifier is in a water production state. When the electrically controlled faucet is closed, the drain solenoid valve 310 will open for a first time period T1 based on an electrical signal indicating that water intake is stopped. During the first period T1 in which the drain solenoid valve 310 is open, the concentrate port 223 of the reverse osmosis cartridge 220 is completely communicated with the drain port 103. Therefore, the water discharged from the booster pump 210 is introduced through the raw water port 221 of the reverse osmosis filter element 220 and is completely discharged through the concentrate port 223 through the drain port 103. During this first time period T1, the membranes of the reverse osmosis cartridge 220 will be flushed by the water flow forced by the booster pump 210. On one hand, the deposition of impurities such as microorganisms on the filter membrane is avoided, and the service life of the reverse osmosis filter element is shortened; on the other hand, the concentrated water in front of the membrane is replaced by the raw water, so that the water quality of the first section of water is higher when the user gets water next time. After the first period T1 is reached, the drain solenoid valve 310 is closed.

The first period of time T1 may be greater than or equal to 10 seconds and less than or equal to 30 seconds. The first time period T1 is set to continue to operate for a certain time after the booster pump 210 receives the electric signal indicating that the water supply is stopped, so that the water resource is saved and the cleanness of the reverse osmosis filter element 220 is ensured on the premise of ensuring the water quality of the next water supply.

The booster pump 210 continues to operate, and the pressure in the reverse osmosis cartridge 220 and the line in which it is located will rise rapidly, since the main water line 200 is blocked by the water outlet means and the concentrate line 300 is blocked by the drain solenoid valve 310. When the pressure detector detects that the pressure of the pipeline in which the pressure detector is positioned is not lower than a first pressure preset value P1, the booster pump 210 stops working according to the electric signal sent by the pressure detector, and the water purifier 100 enters a standby stage. Alternatively, the predetermined first pressure value P1 may be 0.4-0.5 MPa. The first predetermined pressure value P1 is higher than the filtering pressure value of the reverse osmosis filter element 220, so that the water purifier 100 can keep a certain high pressure in the pipeline in the standby stage, the high pressure can ensure that the water enters the water taking stage next time, and when the water outlet device is opened, the water flow flows out rapidly without waiting. In addition, the first predetermined pressure value P1 does not exceed the maximum pressure of the pipeline and the sealing part, so that the risk of water leakage can be reduced.

During the standby period, the first predetermined pressure P1 will be maintained in the reverse osmosis cartridge 220 since the concentrate line 300 is still blocked by the drain solenoid valve 310.

Among the above-mentioned purifier 100, can wash reverse osmosis filter core 220 when stopping the water intaking, guarantee the cleanliness factor of filter membrane promptly, guarantee again that the TDS value of the first section water that the user received is lower. A pressure detector is provided between the booster pump 210 and the reverse osmosis filter cartridge 220, and the operation time of the booster pump 210 after the water intake is finished is controlled by the result of the pressure detection. This is more intelligent than the prior art, which controls the stop of the booster pump 210 based on time, and ensures that the water purifier 100 enters the standby stage after the pressure of the reverse osmosis filter element 220 reaches the first predetermined pressure P1. Therefore, the user can get water instantly. Furthermore, it is avoided that the booster pump 210 continues to operate and damage the reverse osmosis filter element 220 when the pressure in the reverse osmosis filter element 220 has reached the predetermined first pressure value P1.

Illustratively, water purifier 100 also includes a controller. The controller is electrically connected to the booster pump 210, the pressure detector, and the drain solenoid valve 310. The controller may be configured to: controlling the drain solenoid valve 310 to open for a first period of time T1 upon receiving an electrical signal indicating a cessation of water intake; when the line pressure detected by the pressure detector rises to not less than the first predetermined pressure value P1, the booster pump 210 is controlled to stop operating.

In this example, the controller may be electrically connected to all or a portion of the electrical control devices in the water purifier to control the controlled device according to the electrical signal from the detection device. The electric control device in the water purifier includes the aforementioned detection device, such as a pressure detector, and a controlled device, such as various solenoid valves, e.g., the drain solenoid valve 310, and the booster pump 210. The controller at least receives an electric signal indicating that water intake is stopped and an electric signal sent by the pressure detector, and controls the booster pump 210 and the drain solenoid valve 310 accordingly according to the received electric signals. The results of receiving the electric signal and controlling the booster pump 210 and the drain solenoid valve 310 are the same as those described above and will not be described again.

The controller can be built by adopting electronic elements such as a timer, a comparator, a register, a digital logic circuit and the like, or can be realized by adopting processor chips such as a singlechip, 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 the like and peripheral circuits thereof.

The controller may also be configured to control the booster pump 210 to start when the line pressure detected by the pressure detector falls below a first predetermined pressure P1. In other words, in this example, the controller controls the booster pump 210 to start based not only on the electrical signal indicating the start of water intake, but also on the electrical signal from the pressure detector. In the normal use process of the water purifier, under the influence of the processing precision of each device on the pipeline and the property of the device, the pressure in the reverse osmosis filter element 220 may gradually decrease under the condition of being in the standby stage for a long time, and even finally, the pressure in the reverse osmosis filter element 220 is equal to the pressure in the upstream water path of the booster pump 210. Thus, when the next water is taken, the water purifier 100 still needs to lift the pressure in the reverse osmosis filter element 220 and the pipeline where the reverse osmosis filter element is located and then discharge water, so that the effect that the water purifier 100 discharges water immediately at the moment of water taking is difficult to ensure. In this example, the controller activates the booster pump 210 upon the pressure detector detecting that the pressure in the line in which it is located is below a predetermined first pressure value P1. After the pressure rises to the first predetermined pressure P1, the booster pump 210 is controlled to stop again, and the water purifier enters the standby stage again. Therefore, even if the user does not take water for a long time, the water purifier 100 can still ensure that the user can receive and take water immediately when taking water, and the user experience is improved.

Illustratively, the water purifier further includes a water intake control device disposed on the main water line 200 downstream of the reverse osmosis cartridge 220. The water taking control device is electrically connected with the controller. The water intake control device is used for generating and sending the electric signal for stopping water intake to the controller. In the above embodiments, the electric control faucet can be regarded as an aggregate of the water outlet device and the water taking control device, that is, the electric control faucet is used to realize both the water outlet device and the water taking control device. When the electrically controlled faucet is closed, an electrical signal will be sent to the controller indicating that water intake is stopped. The arrangement of the electric control faucet can improve the integration level of the water taking control device and the water outlet device, and only the electric control faucet is arranged at the water taking port independently, so that water leakage points on a water path can be reduced, and the water leakage risk is reduced.

Illustratively, the water intake control device may also be used to generate and send an electrical signal to the controller indicating the start of water intake. In the aforementioned embodiment where the water intake control device is implemented using an electrically controlled faucet, when the electrically controlled faucet is opened, it may send an electrical signal to the controller indicating the start of water intake. The controller may also be configured to control the booster pump 210 to start when an electrical signal is received from the water intake control device indicating the start of water intake. It will be appreciated that the use of an electrical signal from the water extraction control means indicative of the commencement of water extraction to control booster pump 210 activation is merely exemplary. The booster pump 210 may also be activated by other control devices or sensors, which the present invention is not limited to.

Illustratively, the pressure detector may be a first pressure switch 410. The first pressure switch 410 operates on the principle of being open when the pressure in the line reaches its predetermined pressure value and open when the pressure is below its predetermined pressure value. In the water purifier comprising the controller, the first pressure switch 410 is turned on and off to send electric signals to the controller, and the controller controls other devices correspondingly according to the received electric signals. The first pressure switch 410 is used to realize the pressure detector, so that the water purifier 100 has low cost and stable operation.

Illustratively, a first check valve 510 is also provided in the main water line 200. The water inlet of the first check valve 510 is communicated with the water outlet of the booster pump 210, and the water outlet of the first check valve 510 is communicated with the water inlet of the pressure detector. If the first check valve 510 is not provided, in the standby stage, the water inlet of the pressure detector is directly communicated with the booster pump 210, the booster pump 210 is influenced by the structure of the booster pump, although in the starting state, high pressure may be generated on the downstream pipeline, when the booster pump 210 stops working, the sealing effect is poor, the pressure maintaining effect is not good, and the pressure in the pipeline where the pressure detector is located is easy to lose. The first check valve 510 is disposed between the booster pump 210 and the pressure detector, so that the pressure maintaining time can be prolonged and the pressure maintaining effect can be improved. Therefore, the user can obtain the pure water at first time.

Illustratively, the aforementioned water intake control device includes a second pressure switch 420. The working principle of the second pressure switch 420 is the same as that of the first pressure switch 410, and the description thereof is omitted. A second check valve 520 is also provided in the main water line 200. The water inlet of the second check valve 520 is communicated with the pure water port 222 of the reverse osmosis filter element 220, and the water outlet of the second check valve 520 is communicated with the water inlet of the second pressure switch 420. The second pressure switch 420 has a second predetermined pressure value P2, similar to the first pressure switch 410 having the first predetermined pressure value P1. Wherein the predetermined second pressure value P2 of the second pressure switch 420 is less than the predetermined first pressure value P1. Alternatively, in the case where the first predetermined pressure value P1 is 0.4-0.5MPa, the second predetermined pressure value P2 may be 0.1-0.2 MPa. The second predetermined pressure value P2 is set to ensure that the booster pump 210 can continue to work after the water purifier 100 stops fetching water, so that the pressure in the pipeline has a space capable of continuing to rise, and meanwhile, the second predetermined pressure value P2 can also ensure that the pressure is higher than the highest pressure in the tap water pipeline, so that the booster pump 210 can be normally started when a user opens the water outlet device.

When the user stops taking water, the pressure of the pipeline in which the second pressure switch 420 is located rises, the pressure first reaches the second pressure preset value P2, and the second pressure switch 420 is turned off. Taking a water purifier including a controller as an example, the controller receives an electric signal indicating that water intake is stopped from the second pressure switch 420, and then controls the drain solenoid valve 310 to open and conduct the concentrate line for a first time period T1. The reverse osmosis cartridge 220 is flushed using the booster pump 210 as in the above process. It will be appreciated that during the flushing process, due to the presence of the second check valve 520, the pressure in the line in which the second pressure switch 420 is located is not reduced by the opening of the drain solenoid valve 310, but remains at its original pressure. After the first period T1, the drain solenoid valve 310 is closed by receiving a control signal from the controller, and the concentrate line 300 is cut off. The booster pump 210 continues to operate and the pressure in the line downstream of the booster pump 210 gradually rises to a predetermined first pressure value P1. When the pressure reaches the first pressure preset value P1, the first pressure switch 410 is turned off, and after the controller receives an electric signal sent by the first pressure switch 410, the booster pump 210 is controlled to stop working, and the water purifier enters a standby stage.

Thus, by providing the first pressure switch 410 and the second pressure switch 420 at the same time, the electric signal for controlling the booster pump 210 to stop operating and the electric signal for stopping taking water can be transmitted, respectively. The second pressure preset value P2 of the second pressure switch is smaller than the first pressure preset value P1, so that the control logic of the water purifier 100 is clear, and the stable operation of the water purifier is ensured.

Illustratively, the water purifier 100 further includes a water inlet solenoid valve 230. The water inlet solenoid valve 230 is provided on the main water line 200 between the water inlet 101 and the booster pump 210. The water inlet solenoid valve 201 may be electrically connected to a controller, and the controller is further configured to control the water inlet solenoid valve 230 to be opened while controlling the booster pump 210 to be started, and control the water inlet solenoid valve 230 to be closed while controlling the booster pump 210 to be stopped. That is, the water inlet solenoid valve 230 and the booster pump 210 may be operated in synchronization. The water inlet solenoid valve 230 can cut off the main water pipeline 200 at the upstream of the booster pump 210 when the water purifier 100 is in standby, thereby avoiding the phenomenon of ion diffusion in water during long-time standby, and preventing unfiltered raw water from moving to the reverse osmosis filter element 220 to cause water pollution in the reverse osmosis filter element 220 and the water in the downstream water pipeline.

Illustratively, water purifier 100 also includes a front cartridge 240. The pre-filter 240 is provided on the main water line 200 between the water inlet solenoid valve 230 and the booster pump 210. The pre-filter element 240 can primarily filter raw water entering the booster pump 210, and can block silt, scrap iron, organisms and the like in the raw water at the upstream of the pre-filter element 240, so that impurities can be prevented from damaging the booster pump 210 and the reverse osmosis filter element 220 at the downstream.

Illustratively, the water purifier 100 further comprises a concentrate combination valve 320, the concentrate combination valve 320 is arranged on the concentrate pipeline 300, and the concentrate combination valve 320 comprises a waste water ratio device 321 and a concentrate electromagnetic valve 322. In one embodiment, the waste water ratio device 321 and the concentrate solenoid valve 322 are connected in parallel within the concentrate combining valve 320. The rich water combination valve 320 can be in a shut-off state and a fully on state. In the normal water production stage of the water purifier 100, the concentrated water combination valve 320 is in the cut-off state. At this time, the concentrate solenoid valve 322 is closed, and the reverse osmosis cartridge 220 discharges concentrate through the waste water ratio device 321. Due to the interception of the wastewater ratio device 321, the pressure in the reverse osmosis filter element 220 can be increased, and the raw water can be filtered. It is understood that the concentrate solenoid valve 322 can be electrically connected to the controller. Alternatively, the controller may be further configured to control the concentrate solenoid valve 322 to close upon receiving an electrical signal indicating a stop of water intake to ensure that the concentrate solenoid valve 322 is closed during water production of the water purifier 100 this time. Alternatively, the controller may be further configured to control the rich water solenoid valve 322 to close when the line pressure detected by the pressure detector rises to not lower than the first pressure predetermined value. The pipeline pressure detected by the pressure detector is increased to be not lower than the first pressure preset value, which indicates that the water making stage and the flushing stage are both finished, and at this time, the concentrated water solenoid valve 322 is controlled to be closed, so that the concentrated water can be stopped by the wastewater ratio device 321 in the water making process of the water purifier 100 next time. During the flushing phase of the water purifier 100, the concentrate combination valve 320 is in a fully open state. At this time, the concentrate solenoid valve 322 is opened, and the water introduced into the reverse osmosis filter element 220 is rapidly discharged through the concentrate solenoid valve 322, thereby performing a function of cleaning the reverse osmosis filter element 220. Alternatively, the controller may also be used to control the concentrate solenoid valve 322 to open upon receiving an electrical signal indicating that water intake is stopped. When the controller receives an electric signal indicating that water taking is stopped, the controller indicates that the water making stage is finished, and the controller is about to enter a flushing stage, the concentrated water electromagnetic valve 322 can be controlled to be opened so as to ensure that flushing is smoothly completed.

Therefore, the water purifier with the concentrated water combination valve 320 can freely switch the water production and the flushing of the reverse osmosis filter element 220, and is simple in control mode and easy to realize.

In order to illustrate the water purifier of the embodiment of the present invention more clearly, the working principle of the water purifier according to a specific embodiment of the present invention is described in detail and completely.

The user first turns on the water outlet of the water purifier, for example, an electrically controlled faucet. The water purifier enters the water intake stage S1, and the controller receives an electric signal from the water intake control device indicating the start of water intake. After receiving the electric signal, the controller controls the booster pump 210 to start, and also controls the water inlet solenoid valve 230 to open. The water purifier 100 starts to produce water.

When the user closes the water outlet means, such as the electrically controlled faucet, the controller receives an electrical signal from the water intake control means indicating that water intake is stopped. After receiving the electric signal, the controller controls the concentrated water solenoid valve 322 and the drain water solenoid valve 310 to open, the booster pump 210 continues to operate, and the water purifier enters the flushing stage S2. The duration of the flushing phase S2 is a first time period T1. After the flushing stage S2 is finished, the controller controls the concentrated water solenoid valve 322 and the drain solenoid valve 310 to close, the booster pump 210 continues to operate, and the water purifier enters the pressure increasing stage S3. The end time of the pressure raising stage S3 is determined by the detection result of the line pressure by the pressure detector. If the pressure P0 of the pipeline where the pressure detector is located reaches the first predetermined pressure P1, the controller controls the booster pump 210 to stop working, the water purifier 100 enters the standby stage S4, the booster pump 210 stops working, and the water inlet solenoid valve 230 is closed.

In any stage, that is, at any time, when the controller receives an electric signal indicating that water intake is to be started from the water intake control device, the water purifier may stop the current stage and preferentially enter the water intake stage S1.

In the standby stage S4, if the pressure detector detects that the pressure P0 of the pipeline is lower than the first predetermined pressure P1, the booster pump 210 and the water inlet solenoid valve 230 are activated, and the process proceeds to the boosting stage S3.

It can be understood that the working principle of the water purifier is only illustrative, and does not limit the present invention.

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

1. A water purifier comprises a main water pipeline communicated between a water inlet and a water intake of the water purifier, wherein a booster pump and a reverse osmosis filter element are sequentially arranged on the main water pipeline along a water flow direction; the water discharge electromagnetic valve is arranged on the concentrated water pipeline; wherein the drain solenoid valve is opened for a first period of time in response to an electrical signal indicative of a cessation of water intake; the booster pump is electrically connected to the pressure detector and stops operating when the line pressure detected by the pressure detector rises to not less than a first predetermined pressure value.

2. The water purifier of claim 1, further comprising: the controller is electrically connected with the booster pump, the pressure detector and the water discharge electromagnetic valve;

the controller is used for controlling the drainage electromagnetic valve to be opened for the first time period when receiving the electric signal indicating that the water taking is stopped;

and when the pipeline pressure detected by the pressure detector is increased to be not lower than the first pressure preset value, controlling the booster pump to stop working.

3. The water purifier of claim 2, further comprising: a water intake control device arranged on the main water pipeline at the downstream of the reverse osmosis filter element and electrically connected with the controller,

the water intake control device is configured to generate and send the electrical signal indicative of a cessation of water intake to the controller.

4. The water purifier of claim 3, wherein the water intake control device comprises a second pressure switch having a second predetermined pressure value less than the first predetermined pressure value;

and a second check valve is further arranged on the main water pipeline, a water inlet of the second check valve is communicated with a pure water port of the reverse osmosis filter element, and a water outlet of the second check valve is communicated with a water inlet of the second pressure switch.

5. The water purifier of claim 3, wherein the water intake control device is an electrically controlled faucet disposed at the water intake.

6. The water purifier according to any one of claims 1-5, wherein said pressure detector is a first pressure switch.

7. The water purifier as claimed in any one of claims 1 to 5, wherein a first check valve is further disposed on the main water pipeline, a water inlet of the first check valve is communicated with a water outlet of the booster pump, and a water outlet of the first check valve is communicated with a water inlet of the pressure detector.

8. The water purifier according to any one of claims 1 to 5, further comprising a concentrate combination valve disposed on the concentrate line, the concentrate combination valve comprising a waste water ratio device and a concentrate solenoid valve.

9. The water purifier according to any one of claims 1 to 5, further comprising a water inlet solenoid valve provided on a main water line between said water inlet and said booster pump.

10. The water purifier of claim 9, further comprising: the front filter element is arranged on a main water pipeline between the water inlet electromagnetic valve and the booster pump.