CN212106238U - Water purifier - Google Patents

Abstract

The utility model provides a water purifier, which comprises a main water pipeline communicated to a water outlet. The main water pipeline comprises a booster pump and a reverse osmosis filter element which are sequentially arranged along the water flow direction. The water purifier also comprises a water tank and a water storage pipeline, wherein the first end of the water storage pipeline is communicated between the reverse osmosis filter element and the water outlet, and the second end of the water storage pipeline is communicated to the water tank. The water storage pipeline comprises a water suction pump, and the water suction pump is used for pumping water from the water tank. The water purifier also comprises a water return pipeline and a water path switching device. The water path switching device comprises a water inlet, a first water outlet and a second water outlet, the water inlet is communicated to a pure water port of the reverse osmosis filter element, the first water outlet is communicated to the first end of the water storage pipeline, the second water outlet is communicated to the second end of the water return pipeline, the water path switching device enables the water inlet to be communicated with the first water outlet or the second water outlet, and the first end of the water return pipeline is communicated to a water inlet of the booster pump. Therefore, the user can be prevented from receiving the first section of water with higher TDS, and the use experience of the user is improved.

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. Reverse osmosis water purifiers are becoming more popular because the purified water produced by them is fresher, more sanitary and safer.

The raw water has higher TDS (total dissolved solids) more, and the reverse osmosis filter core can block a large amount of ions in the raw water before the osmotic membrane under the effect of booster pump, and makes the TDS of the water through the osmotic membrane accord with the standard of straight drinking water. In current purifier, in order to improve the water yield, all be provided with the water tank, deposit the straight drink water that prepares in advance, at the water intaking in-process, the water in the water tank flows with the straight drink water of newly preparing together, is taken by the user, perhaps when the water level in the water tank is lower, impounds in to the water tank.

However, after the water preparation is finished, a small amount of concentrated water in the reverse osmosis filter element still exists in front of the reverse osmosis membrane. After long-time shutdown, according to the principle that ions are diffused from high-concentration solution to low-concentration solution, the ions in the concentrated water in front of the membrane can be diffused into the directly drinking water purified behind the membrane, so that the purified directly drinking water is polluted. When the water is taken next time, the polluted direct drinking water can be mixed with new direct drinking water to flow out together, so that the TDS of the first section of water taken by the user is higher than the standard value.

To address this problem, the prior art typically flushes the reverse osmosis cartridge periodically to ensure that a user can obtain water with a TDS that is within the standards each time the user takes water. However, this results in frequent start-up of the water purifier, reduces the service life, and also causes waste of water resources.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems in the prior art, the present invention provides a water purifier, comprising a main water pipeline communicated to a water outlet, the main water pipeline comprising a booster pump and a reverse osmosis filter element sequentially arranged along a water flow direction, the water purifier further comprising a water tank and a water storage pipeline, a first end of the water storage pipeline being communicated between the reverse osmosis filter element and the water outlet, a second end of the water storage pipeline being communicated to the water tank, the water storage pipeline comprising a water pump for pumping water from the water tank, the water purifier further comprising a water return pipeline and a water path switching device, the water path switching device comprising a water inlet, a first water outlet and a second water outlet, the water inlet being communicated to a pure water port of the reverse osmosis filter element, the first water outlet being communicated to the first end of the water storage pipeline, the second water outlet being communicated to the second end of the water return pipeline, the water path switching, the first end of the water return pipeline is communicated to a water inlet of the booster pump.

Therefore, the water purifier with the structure has the advantages that due to the fact that the water path switching device and the water return pipeline are arranged, water with high TDS in the reverse osmosis filter element can flow back to the water inlet of the booster pump through the water path switching device and the water return pipeline in the time period when a user starts to take water. The water taken by the user at this time is pure water prepared in advance in the water tank. Therefore, the situation that the user accesses the first section of water with higher TDS is effectively avoided, and the use experience of the user is improved. Meanwhile, the water purifier does not need to frequently wash the reverse osmosis filter element, so that the starting frequency of the booster pump is reduced, and the service life is prolonged. And, the first section water that has higher TDS can also get into reverse osmosis filter core again and filter, has avoided the waste to the water resource.

Illustratively, the waterway switching device comprises a first electromagnetic valve and a second electromagnetic valve which are connected in parallel, wherein the first electromagnetic valve is communicated between the water inlet and the first water outlet, and the second electromagnetic valve is communicated between the water inlet and the second water outlet.

Like this, first solenoid valve and second solenoid valve can use ordinary one and advance one and go out the solenoid valve, and the water route is simple, easily realizes, and during the maintenance, can change low cost to one of them solenoid valve.

Illustratively, the waterway switching device comprises a one-in two-out electromagnetic valve, a water inlet of the one-in two-out electromagnetic valve is communicated to the water inlet, and two water outlets of the one-in two-out electromagnetic valve are respectively communicated to the first water outlet and the second water outlet.

Therefore, the water purifier with the one-inlet two-outlet electromagnetic valve can reduce the space occupied by the electromagnetic valve, reduce the size of the water purifier and improve the integration level of a water channel of the water purifier.

Exemplarily, a first check valve is further arranged on the water return pipeline, and the conduction direction of the first check valve is from the second end of the water return pipeline to the first end of the water return pipeline.

The setting of first check valve can prevent at water route auto-change over device in the switching process, the pressure fluctuation phenomenon of production, improves user's use and experiences.

Illustratively, the water purifier comprises a controller, the controller is electrically connected with the water path switching device, and after the controller receives a predetermined time period after receiving an electric signal which represents the start of water outlet from the water outlet control device or receives a detection signal from the detection device, the controller controls the water inlet of the water path switching device to be communicated with the first water outlet; and when the water purifier enters a standby state, the water inlet of the water channel switching device is controlled to be communicated with the second water outlet.

Therefore, the water purifier with the controller can better control the booster pump, the water suction pump, the water path switching device and the like, and can adjust and set the preset threshold value for switching the water path of the water path switching device, such as the preset time period, the preset total dissolved solid amount threshold value, the preset total pure water amount threshold value and the like, through the controller, so that the logical relation among the devices in the water purifier is simplified.

Illustratively, the water tank is provided with a liquid level detector, and the liquid level detector is used for detecting the liquid level in the water tank and outputting liquid level information to the controller, and the controller controls the water purifier to enter a standby state after receiving an electric signal which is sent by the water outlet control device and indicates that water outlet is finished and when the liquid level information indicates that the liquid level in the water tank is higher than the upper limit liquid level.

Therefore, the water tank can be prevented from being overfull stored in the water tank, and the use experience of a user is influenced.

Illustratively, the water tank is provided with a liquid level detector, and the liquid level detector is used for detecting the liquid level in the water tank and outputting liquid level information to the controller, and the controller controls the water suction pump to be closed when the liquid level information indicates that the liquid level in the water tank is lower than the lower limit liquid level.

Therefore, the water suction pump can be prevented from continuously working in the absence of water and idling. Reduce the noise of suction pump, also avoided the damage to suction pump.

Illustratively, the water outlet control device is a high-voltage switch arranged on the main water pipeline, and the high-voltage switch is electrically connected to the controller.

Therefore, the water purifier with the high-voltage switch can control the water purifier through the mechanical faucet, and the application range of the water purifier is expanded.

Illustratively, the water outlet control device is an electric control faucet, and the controller is also used for electrically connecting the electric control faucet.

The electrically controlled faucet may send an electrical signal directly to the controller indicating the beginning of the water discharge and an electrical signal indicating the end of the water discharge. The controller controls the booster pump, the water suction pump, the water path switching device and the like according to the received electric signals. The logic relation between the controller in the water purifier and each execution device is effectively simplified.

Illustratively, the purifier includes water quality detector, and water quality detector is used for detecting the total amount of the dissoluble solid of the pure water that reverse osmosis filter core made, and water quality detector electricity connects the controller to send detected signal to the controller as detection device.

Therefore, the water inlet of the water channel switching device is controlled to be communicated with the first water outlet by using the detection result of the water quality detector. Can directly ensure that the water taken by the user is direct drinking water which meets the standard vertebra or the TDS is less than the preset value. The water quality is prevented from meeting the standard, and the water inlet is not communicated with the first water outlet, so that the time of the water purifier for treating the first section of water is prolonged; the problem that the water quality does not meet the standard yet, but the water inlet is communicated with the first water outlet is also avoided, so that a user acquires water with high TDS and the use experience of the user is influenced.

Illustratively, the water quality detector is arranged between a pure water port of the reverse osmosis filter element and a water inlet of the water path switching device or arranged on the water return pipeline.

Therefore, the water purifier with the structure can avoid the first section of water with higher TDS from being received by a user. And the position of placing the water quality detector has multiple choices, and the flexibility is high.

Illustratively, the water purifier comprises a flow meter for detecting the total amount of pure water prepared by the reverse osmosis filter element, and the flow meter is electrically connected with the controller to serve as a detection device for sending a detection signal to the controller.

Therefore, the flow meter can directly accumulate the water quantity flowing through the flow meter, and the preset pure water total quantity threshold value can be adjusted according to the water quality condition of the local area. If the water quality is better, the preset pure water total amount threshold value can be reduced; if the water quality is poor, the preset pure water total amount threshold value can be properly increased.

Illustratively, the flowmeter is arranged between a pure water port of the reverse osmosis filter element and a water inlet of the water path switching device or arranged on the water return pipeline.

Like this, the position that the flowmeter was placed has multiple choice, and the flexibility is high, not only can detect the water yield on the inflow return water pipeline, can also detect the total water yield of reverse osmosis filter core preparation, has enlarged the range of application of flowmeter, can make the hardware basis to the extension of the function of purifier.

The main water pipeline comprises a second one-way valve, the second one-way valve is arranged between the water channel switching device and the water storage pipeline, and the conduction direction of the second one-way valve is from the water channel switching device to the water storage pipeline.

The phenomenon that the water purifier opens and stops repeatedly can be avoided to the second check valve, has improved user's use and has experienced.

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 a first exemplary embodiment of the present invention;

fig. 2 is a schematic water path diagram of a water purifier according to a second exemplary embodiment of the present invention;

fig. 3 is a schematic water path diagram of a water purifier according to a third exemplary embodiment of the present invention; and

fig. 4 is a schematic water path diagram of a water purifier according to a fourth exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. 100 ', 100 "', a water purifier; 101. a water inlet; 110. a front filter element; 120. a water inlet electromagnetic valve; 130. a concentrated water electromagnetic valve; 200. a main water line; 210. a booster pump; 220. a reverse osmosis filter element; 221. a pure water port; 230. a high voltage switch; 102. a water outlet; 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; 311. a liquid level detector; 320. a water pump; 330. a water storage solenoid valve; 400. a water return pipeline; 401. a first end of a return line; 402. a second end of the return line; 410. a first one-way valve 500 and a waterway switching device; 501. a water inlet; 502. a first water outlet; 503. a second water outlet; 510. a first solenoid valve; 520. a second solenoid valve; 530. an inlet and outlet electromagnetic valve; 610. a water quality detector; 620. a flow meter.

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, which has a water inlet 101 and a water outlet 102, wherein the water inlet 101 can be connected to a water source such as a municipal water pipe, the water outlet 102 can be connected to a water outlet device, and the water outlet device can include a mechanical faucet, an electric control faucet, a pipeline machine, and other devices. The water purifier 100 comprises a main water pipeline 200 communicated to the water outlet 102, wherein the main water pipeline 200 comprises a booster pump 210 and a reverse osmosis filter element 220 which are sequentially arranged along the water flow direction. The booster pump 210 functions to increase the pressure of water in a downstream pipeline and a device thereof, so that the water having a certain pressure passes through the reverse osmosis filter element 220, and is filtered by the reverse osmosis filter element 220 to generate drinkable pure water. Pure water filtered by the reverse osmosis filter element 220 may flow out through the water outlet 102.

The water purifier 100 further comprises a water storage pipeline 300 and a water tank 310, wherein a first end 301 of the water storage pipeline is communicated with the main water pipeline 200 and is positioned between the reverse osmosis filter element 220 and the water outlet 102, and a second end 302 of the water storage pipeline is communicated 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 includes a suction pump 320, the suction pump 320 for pumping water from the water tank 310. This can reduce the time for the user to wait for the water purifier 100 to prepare pure water. The above are all the prior art, and the process of filtering through the reverse osmosis filter element 220 is a technical means well known to those skilled in the art, and the detailed principle is not described in detail.

The water purifier 100 further comprises a water return pipe 400 and a water path switching device 500. The first end 401 of the water return line is connected to the water inlet of the booster pump 210, and the second end 402 of the water return line is connected to the main water line 200 via the water path switching device 500.

The waterway switching device 500 includes a water inlet 501, a first water outlet 502, and a second water outlet 503. The water inlet 501 is connected to the pure water inlet 221 of the reverse osmosis filter element 220, the first water outlet 502 is connected to the first end 301 of the water storage pipe, and the second water outlet 503 is connected to the second end 402 of the water return pipe 400. The waterway switching device 500 can enable the water inlet 501 to be communicated with the first water outlet 502 or the second water outlet 503 alternatively, thereby realizing the function of waterway switching. That is, after the pure water generated by filtering enters the waterway switching device 500, two waterways can flow, or flow to the water tank 310 or the water outlet 102 of the water purifier 100 through the first water outlet 502, or flow back to the water inlet of the booster pump 210 through the second water outlet 503 and the water return pipe 400.

For example, the standby state of the water purifier 100 is a state after the water purifier completes the water purifying operation each time. After a period of time after the user stops taking water, the water purifier 100 will complete the water purifying operation and enter a standby state to wait for the next water purifying operation. When the water purifier 100 enters the standby state, the booster pump 210 and the suction pump 320 are turned off, the water in the water tank 310 is in the full water state, and the water inlet 501 of the water path switching device 500 is communicated with the second water outlet 503. At this time, two water paths which are not communicated with each other, that is, an annular water path formed by the booster pump 210, the reverse osmosis filter element 220 and the water return pipeline 400, and a water path communicated from the water tank 310 and the water pump 320 to the water outlet 102 are formed in the water purifier 100.

When the user takes water, the booster pump 210 and the suction pump 320 are started, and the water path switching device 500 will continue to maintain the state for a predetermined period of time. The predetermined period of time has a duration T, which may be preset empirically. During the predetermined period of time, the user may access the pure water prepared in advance in the water tank 310 through the water outlet device communicated with the water outlet 102, and the pure water in the water tank 310 is pumped out by the water pump 320.

Meanwhile, in the predetermined time period, the raw water is pressed into the reverse osmosis filter element 220 by the booster pump 210, and after filtration, the produced pure water pushes the membrane of the reverse osmosis filter element 220 during standby and then enters the water return pipeline 400 from the second water outlet 503 of the waterway switching device 500 due to the higher TDS of diffusion. Since the first end 401 of the water return line is connected to the water inlet of the booster pump 210, the water in the water return line 400 enters the booster pump 210 again together with the water from the water inlet 101, and is pressed into the reverse osmosis filter element 220 again for filtration. The water that does not pass through the reverse osmosis membrane is discharged through the concentrate port of the reverse osmosis filter element 220.

In the predetermined time period, the water inlet 501 of the water path switching device 500 is only communicated with the second water outlet 503, so that when the water is standby for a long time, water with high TDS due to diffusion action behind the reverse osmosis filter element 220 cannot be directly taken by a user, and the water taken by the user is only pumped out from the water tank 310, so that the first section of water with high TDS generated by diffusion action is prevented from being taken by the user, and the use experience of the user is improved. Meanwhile, the first section of water with higher TDS can also flow into the water inlet of the booster pump 210 for circular filtration, so that the TDS meets the standard.

When the user takes water for the predetermined period of time, the water path switching device 500 will switch to the state of communicating the water inlet 501 with the first water outlet 502, and at this time, the pure water prepared by the booster pump 210 and the reverse osmosis filter element 220 will flow to the water outlet 102 together with the water pumped by the water tank 310 (if present) by the water pump 320 to be taken by the user.

Until the user stops getting water, the water path switching device 500 keeps the water inlet 501 and the first water outlet 502 connected, and the water purifier 100 will first fill the water tank 310. Then, the booster pump 210 and the suction pump 320 are turned off, and the water inlet 501 and the second water outlet 503 of the water path switching device 500 are conducted to enter a standby state.

In another embodiment, the user stops the water fetching action when the predetermined time period is not reached. After the user stops the water intake operation, the water path switching device 500 maintains the state where the water inlet 501 and the second water outlet 503 are in conduction for the predetermined period of time. When the predetermined time period is reached, the water inlet 501 is communicated with the first water outlet 502 to store the pure water purified by the reverse osmosis cartridge 220 into the water tank 310 for the next water intake. After the water tank 310 is full, the booster pump 210 and the suction pump 320 are turned off, and the water inlet 501 and the second water outlet 503 of the water path switching device 500 are communicated to enter a standby state.

The timely switching of the water path by the water path switching device 500 can be realized in various ways, for example, by providing a time delay device in the water purifier 100, or by controlling the time delay device by a controller, which will be described in detail later.

The predetermined period of time of the backwater is for filtering the first period of water of the reverse osmosis cartridge 220, so the time period T thereof may be set to 10 seconds, 15 seconds, 20 seconds, 25 seconds, 30 seconds, 35 seconds, 40 seconds, 45 seconds, 50 seconds, 55 seconds, 60 seconds, etc. Can be adjusted according to the length of the relevant water path of the water purifier 100 and the path of the water path.

The waterway switching device 500 may have various structures, for example, two parallel electromagnetic valves may be used, and the two electromagnetic valves may be linked to each other to be selectively turned on; or a one-inlet two-outlet electromagnetic valve can be arranged to realize the functions.

For detecting whether the water in the water tank 310 is in a full water state, a weight detecting device may be disposed below the water tank 310 to detect the weight of the water in the water tank 310, or a flow meter may be disposed between the water tank 310 and the water outlet 102 to calculate the flow rate to determine the water level state in the water tank 310. A preferred mode will be provided below.

Therefore, in the water purifier 100 having the above structure, since the water path switching device 500 and the water return line 400 are provided, in a time period when a user starts to take water, water having a high TDS in the reverse osmosis filter element 220 can flow back to the water inlet of the booster pump 210 through the water path switching device 500 and the water return line 400. The water taken by the user at this time is pure water prepared in advance in the water tank 310. Therefore, the situation that the user accesses the first section of water with higher TDS is effectively avoided, and the use experience of the user is improved. Meanwhile, the water purifier does not need to frequently wash the reverse osmosis filter element 220, so that the starting frequency of the booster pump 210 is reduced, and the service life is prolonged. And, the first section water that has higher TDS can also get into reverse osmosis filter core 220 again and filter, has avoided the waste to the water resource.

In one embodiment, referring to fig. 1, the waterway switching device 500 may include a one-in two-out solenoid valve 530. The inlet of the one-in two-out solenoid valve 530 is connected to the water inlet 501, and the two outlets of the one-in two-out solenoid valve 530 are respectively connected to the first water outlet 502 and the second water outlet 503.

Therefore, the water purifier 100 with the one-inlet two-outlet solenoid valve 530 can reduce the space occupied by the solenoid valve, reduce the size of the water purifier, and improve the integration level of the water channel.

In another embodiment, as shown in fig. 2, the waterway switching device 500 of the water purifier 100' comprises a first solenoid valve 510 and a second solenoid valve 520 connected in parallel. The first solenoid valve 510 communicates between the water inlet 501 and the first water outlet 502, and the second solenoid valve 520 communicates between the water inlet 501 and the second water outlet 503. The first and second solenoid valves 510, 520 may have a ganged relationship, with one and only one solenoid valve being in a conductive state at the same time. Illustratively, the second solenoid valve 520 is turned on during standby and the predetermined period of time since the user started to take water, and the first solenoid valve 510 is switched on at the end of the predetermined period of time.

In this way, the first solenoid valve 510 and the second solenoid valve 520 can use a common one-inlet one-outlet solenoid valve, the water path is simple, the implementation is easy, and one of the solenoid valves can be replaced during maintenance, so that the cost is low.

Illustratively, the return pipe 400 is further provided with a first check valve 410, and the first check valve 410 is conducted from the second end 402 of the return pipe 400 to the first end 401 thereof, i.e., from the pure water port 221 to the water inlet of the booster pump 210. In the switching process of the waterway switching device 500, there may be a certain time, and the water inlet 501, the first water outlet 502 and the second water outlet 503 are all in a conducting state. Therefore, the pure water port 221 of the reverse osmosis filter element 220 is communicated with the water inlet 101 of the water purifier 100, so that the pressure of the water outlet 102 of the water purifier 100 fluctuates, and the phenomenon of discontinuous water outlet is caused. The first check valve 410 can prevent the pressure fluctuation phenomenon generated during the switching process of the waterway switching device 500, thereby improving the user experience.

Illustratively, the water purifier 100 may include a controller electrically connected to the water path switching device 500, and the controller controls the water inlet 501 of the water path switching device 500 to be communicated with the first water outlet 502 after a predetermined time period T after receiving an electric signal from the water outlet control device indicating the start of water outlet. When the water purifier 100 enters the standby state, the water inlet 501 of the water channel switching device 500 is controlled to be communicated with the second water outlet 503.

In one embodiment, referring to FIG. 1, the outlet control device may be a high-voltage switch 230 disposed on the main water line 200, the high-voltage switch 230 being electrically connected to the controller. Specifically, the high pressure switch 230 may be disposed downstream of the water circuit 300. If the main water line 200 is provided with the high pressure switch 230, the user can take water by connecting a mechanical faucet behind the high pressure switch 230. Specifically, when the water purifier 100 is in the standby state, the booster pump 210 and the suction pump 320 are turned off, the water inlet 501 and the second water outlet 503 of the water path switching device 500 are connected, the high pressure exists between the first water outlet 502 of the water path switching device 500 and the main water pipeline 200 of the mechanical faucet, and the high pressure switch 230 is turned off.

When a user opens the mechanical faucet to take water, the high-pressure switch 230 is communicated with the atmosphere, the pressure of a pipeline where the high-pressure switch 230 is located is reduced, the high-pressure switch 230 is conducted, and an electric signal indicating that water outlet is started is sent to the controller. The controller receives the electrical signal and controls the booster pump 210 and the suction pump 320 to start. The water pump 320 pumps the water in the water tank 310 to the mechanical faucet, and the booster pump 210 circulates the water before the water path switching device 500 and filters the water by the reverse osmosis filter element 220 to reduce the TDS of the water after the reverse osmosis membrane.

When the preset time period T is reached, the controller conducts the water inlet 501 of the control waterway switching device 500 with the first water outlet 502. At this time, if the user is still taking water, the water taken by the user through the mechanical faucet includes the pure water pumped by the water tank 310 through the water pump 320, and also includes the pure water newly prepared by the booster pump 210 and the reverse osmosis filter 220.

After the user closes the mechanical faucet, the booster pump 210 continues to produce water to the main water line 200. After the mechanical faucet is turned off, water flows into the water tank 310 until the water tank 310 is full of water and the water storage line 300 and the main water line 200 are both filled with high-pressure water, the high-pressure switch 230 is turned off, an electric signal for ending water outlet is sent to the controller, the controller controls the water inlet 501 of the water path switching device 500 to be connected with the second water outlet 503, and the water purifier 100 enters a standby state.

Therefore, the water purifier 100 with the high-voltage switch 230 can control the water purifier 100 through the mechanical faucet, and the application range of the water purifier 100 is expanded.

In another embodiment, referring to FIG. 2, the outlet control device of the water purifier 100' can be an electrically controlled faucet, and the controller can be electrically connected to the electrically controlled faucet. The electric control faucet can be regarded as a combined device of a water outlet control device and a water outlet device. The electrically controlled faucet may send an electrical signal directly to the controller indicating the beginning of the water discharge and an electrical signal indicating the end of the water discharge. The controller controls the booster pump 210, the suction pump 320, the water path switching device 500, and the like according to the received electric signals. The logical relationship between the controller and each execution device in the water purifier 100' is effectively simplified.

The water path switching device 500 may be switched in various ways other than the preset time period T, which will be described in detail below.

In one embodiment, as depicted in fig. 3, water purifier 100 "includes water quality detector 610. The water quality detector 610 may be used to detect the total amount of dissolved solids of the pure water produced by the reverse osmosis cartridge 220. The water quality detector 610 is electrically connected to the controller to serve as a detection device to send a detection signal to the controller. When the controller determines that the total amount of the soluble solids is less than or equal to the preset total amount of the soluble solids threshold value according to the detection signal, the controller controls the waterway switching device 500 to enable the water inlet 501 of the waterway switching device 500 to be communicated with the first water outlet 502.

The water quality detector 610 can detect the water quality condition of the water at the rear end of the reverse osmosis filter element 220. If the TDS of the water therein is detected to be higher than the standard value or the preset value, the waterway switching device 500 conducts the water inlet 501 with the second water outlet 503, or keeps the conduction state of the water inlet 501 with the second water outlet 503. The water that reverse osmosis filter core 220 prepared will flow into return water pipe 400 in, avoided the user to receive the higher water of TDS. If water is produced after a period of time or the time interval between the water production and the last water taking time of the user is short, and the water quality of the water at the rear end of the reverse osmosis filter element 220 meets the standard value or reaches the preset value, the controller controls the water path switching device 500 to conduct the water inlet 501 and the first water outlet 502.

It can be seen that the water inlet 501 of the water channel switching device 500 is controlled to be in communication with the first water outlet 502 by using the detection result of the water quality detector 610. Can directly ensure that the water taken by the user is direct drinking water which meets the standard vertebra or the TDS is less than the preset value. The water quality is prevented from meeting the standard, and the water inlet 501 is not communicated with the first water outlet 502, so that the time of the water purifier for treating the first section of water is prolonged; the problem that the water quality does not meet the standard yet, but the water inlet 501 and the first water outlet 502 are communicated, so that a user can obtain water with high TDS and the use experience of the user is influenced is also avoided.

In one embodiment, the water quality detector 610 may be disposed between the pure water port 221 of the reverse osmosis cartridge 220 and the water inlet 501 of the waterway switching device 500. Before water intake begins, the water inlet 501 of the water path switching device 500 is communicated with the second water outlet 503, and when the water quality passing through the water quality detector 610 is detected to be qualified, the water path switching device 500 is communicated with the first water outlet 502.

In another embodiment, the water quality detector 610 may be further disposed on the return pipe 400. The operation flow and principle are the same as those of the previous embodiment, and are not described in detail.

Therefore, the water purifier with the structure can avoid the first section of water with higher TDS from being received by a user. And the position of placing water quality detector 610 has multiple choices, and the flexibility is high.

Illustratively, as shown in fig. 4, water purifier 100 "' may also include a flow meter 620. The flow meter 620 may be used to detect the total amount of pure water produced by the reverse osmosis cartridge 220. The flow meter 620 is electrically connected to the controller to serve as a detection device to send a detection signal to the controller. After receiving a detection signal sent when the total amount of pure water flowing through the flow meter 620 detected by the flow meter is greater than or equal to a preset total amount of pure water threshold, the controller controls the water path switching device 500 to conduct the water inlet 501 of the water path switching device 500 with the first water outlet 502.

After the user opens the faucet to take water, freshly prepared pure water will flow out of the pure water port 221 and the flow meter 620 will begin to accumulate the total amount of fluid flowing through it. When the total amount of the fluid flowing through the flow meter 620 is equal to or greater than the preset pure water total amount threshold value, the water inlet 501 is communicated with the first water outlet 502.

Therefore, the flow meter 620 can directly accumulate the water amount flowing through the flow meter, and the preset pure water total amount threshold value can be adjusted according to the water quality condition of the local area. If the water quality is better, the preset pure water total amount threshold value can be reduced; if the water quality is poor, the preset pure water total amount threshold value can be properly increased.

In one embodiment, a flow meter 620 may be disposed on the return line 400. After the user opens the faucet to take water, newly prepared pure water flows in from the second water outlet 503 through the water inlet 501 and enters the water return pipe 400. The flow meter 620 detects the amount of fluid flowing into the return line 400.

Further, the flow meter 620 may be further disposed between the pure water port 221 of the reverse osmosis filter element 220 and the water inlet 501 of the waterway switching device 500. Like this, the position that flowmeter 620 placed has multiple choice, and the flexibility is high, not only can detect the water yield on the inflow return water pipeline 400, can also detect the total water yield of reverse osmosis filter core 220 preparation, has enlarged flowmeter 620's range of application, can make the hardware foundation to the extension of purifier 100's function.

Therefore, the water purifiers 100, 100 ', 100 "' having the controller can better control the booster pump 210, the water pump 320, the water path switching device 500, and the like, and the controller can adjust and set the predetermined threshold values for switching the water path of the water path switching device 500 to the conducting water path, such as the predetermined time period, the preset total dissolved solids threshold value, the preset total purified water threshold value, and the like, so as to simplify the logical relationship among the devices in the water purifiers 100, 100 ', 100"'.

Illustratively, a liquid level detector 311 may be further disposed in the water tank 310, and the liquid level detector 311 is configured to detect a liquid level in the water tank 310 and output liquid level information to the controller. The controller controls the water purifier 100 to enter a standby state after receiving an electric signal from the water outlet control device indicating that water outlet is finished and when the liquid level information indicates that the liquid level in the water tank 310 is higher than the upper limit liquid level.

The liquid level detector 311 may be a float level meter, a flap level meter, an ultrasonic level meter, or the like. When the water level in the water tank 310 reaches the upper limit level, it indicates that the water tank 310 is full. This prevents the water from overflowing the water tank 310 and affecting the user experience by storing water in the water tank 310.

In the embodiment with the high-voltage switch 230, the water storage solenoid valve 330 may be further disposed on the water storage pipeline 300, the water storage solenoid valve 330 is electrically connected to the controller, when the water tank 310 is full of water, the controller controls the water storage solenoid valve 330 to be closed, and at this time, pure water prepared by the reverse osmosis filter element 220 will flow into the pipeline where the high-voltage switch 230 is located, so as to ensure that the high-voltage switch 230 is switched off at proper time, thereby enabling the water purifier 100 to enter a standby state.

In another embodiment, the liquid level detector 311 in the water tank 310 may send an electric signal for water shortage, and when the liquid level in the water tank 310 is lower than the lower limit liquid level, send an electric signal for water shortage, and when the controller receives the electric signal for water shortage, control the water pump 320 to turn off.

Thus, the water pump 320 can be prevented from continuing to work when the water is short of water, and the idling phenomenon can be prevented. Reducing the noise of the suction pump 320 and also avoiding damage to the suction pump 320.

Illustratively, the main water line 200 also includes a second one-way valve 240. The second check valve 240 is disposed on the main water line 200 between the water line switching device 500 and the water storage line 300. The conducting direction is from the waterway switching device 500 to the water storage pipeline 300. As mentioned above, in the waterway switching device 500, there may be a certain time when the water inlet 501, the first water outlet 502 and the second water outlet 503 are all in the conducting state. In the water purifier having the water outlet control device of the high-voltage switch 230, when the water purifier is in a standby state, the switching of the water path switching device 500 causes the pressure in the pipeline where the high-voltage switch 230 is located to be released, so that the high-voltage switch 230 is erroneously turned on, and the booster pump 210 is repeatedly started. The second check valve 240 can prevent the water purifier 100 from being repeatedly started and stopped, and the use experience of the user is improved.

The water purifiers 100, 100 ', 100 ", 100'" may further include a pre-filter 110, a water inlet solenoid valve 120, a concentrated water solenoid valve 130, and the like, and the connection relationship and the use principle thereof are well known to those skilled in the art and will not be described in detail.

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 (14)

1. A water purification machine comprising a main water line (200) connected to a water outlet (102), the main water line comprising a booster pump (210) and a reverse osmosis filter element (220) arranged in sequence along a water flow direction, the water purification machine further comprising a water tank (310) and a water storage line (300), a first end (301) of the water storage line being connected to between the reverse osmosis filter element and the water outlet, a second end (302) of the water storage line being connected to the water tank, the water storage line comprising a water pump (320) for pumping water from the water tank, characterized in that,

the water purifier further comprises a water return pipeline (400) and a water path switching device (500), the water path switching device comprises a water inlet (501), a first water outlet (502) and a second water outlet (503), the water inlet is communicated to a pure water inlet (221) of the reverse osmosis filter element, the first water outlet is communicated to a first end of the water storage pipeline, the second water outlet is communicated to a second end (402) of the water return pipeline, the water path switching device enables the water inlet to be communicated with the first water outlet or the second water outlet, and a first end (401) of the water return pipeline is communicated to a water inlet of the booster pump.

2. The water purifier according to claim 1, wherein said water circuit switching means (500) comprises a first solenoid valve (510) and a second solenoid valve (520) connected in parallel, said first solenoid valve communicating between said water inlet (501) and said first water outlet (502), said second solenoid valve (520) communicating between said water inlet and said second water outlet (503).

3. The water purifier according to claim 1, wherein the water path switching device (500) comprises a one-in two-out solenoid valve (530), the water inlet of the one-in two-out solenoid valve is connected to the water inlet (501), and the two water outlets of the one-in two-out solenoid valve are respectively connected to the first water outlet (502) and the second water outlet (503).

4. The water purification machine according to claim 1, wherein a first check valve (410) is further arranged on the return pipe (400), and the first check valve is communicated from the second end (402) of the return pipe to the first end (401) of the return pipe.

5. The water purifier according to any one of claims 1 to 4, wherein the water purifier comprises a controller electrically connected to the water path switching device (500), the controller controlling the water inlet (501) of the water path switching device to be communicated with the first water outlet (502) after a predetermined time period after receiving an electric signal from the water outlet control device indicating the start of water outlet or after receiving a detection signal from the detection device; and when the water purifier enters a standby state, controlling the water inlet of the waterway switching device to be communicated with the second water outlet (503).

6. The water purifier as recited in claim 5, wherein the water tank (310) is provided with a liquid level detector (311) for detecting a liquid level in the water tank and outputting liquid level information to the controller, and the controller controls the water purifier to enter a standby state after receiving an electric signal indicating that water outlet is finished from the water outlet control device and when the liquid level information indicates that the liquid level in the water tank is higher than an upper limit liquid level.

7. The water purifier according to claim 5, wherein the water tank (310) is provided with a liquid level detector (311) for detecting a liquid level in the water tank and outputting liquid level information to the controller, the controller controlling the water pump (320) to be turned off when the liquid level information indicates that the liquid level in the water tank is lower than a lower limit liquid level.

8. The water purifier according to claim 5, wherein said water outlet control means is a high voltage switch (230) provided on said main water line (200), said high voltage switch being electrically connected to said controller.

9. The water purifier of claim 5, wherein the outlet control device is an electrically controlled faucet, and the controller is further configured to electrically connect the electrically controlled faucet.

10. The water purification machine of claim 5, wherein the water purification machine comprises a water quality detector (610) for detecting a total amount of soluble solids of the pure water produced by the reverse osmosis cartridge (220), the water quality detector being electrically connected to the controller as the detection means for sending the detection signal to the controller.

11. The water purification machine according to claim 10, wherein said water quality detector (610) is arranged between said purified water port (221) of said reverse osmosis cartridge (220) and said water inlet (501) of said waterway switching device (500) or on said water return line (400).

12. The water purification machine according to claim 5, wherein said water purification machine comprises a flow meter (620) for detecting the total amount of pure water produced by said reverse osmosis cartridge (220), said flow meter being electrically connected to said controller as said detection means for sending said detection signal to said controller.

13. The water purification machine according to claim 12, wherein the flow meter (620) is arranged between the purified water port (221) of the reverse osmosis cartridge (220) and the water inlet (501) of the waterway switching device (500) or on the water return line (400).

14. The water purifier according to any one of claims 1 to 4, wherein the main water line (200) comprises a second check valve (240) disposed between the water path switching device (500) and the water storage line (300), and the second check valve is conducted from the water path switching device to the water storage line.

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