CN212687725U - Water purifier - Google Patents

Abstract

The utility model provides a water purifier, it is including communicateing to the main water pipeline of delivery port, and main water pipeline includes booster pump and reverse osmosis filter core, still includes: the water storage device is communicated to a main water pipeline between the reverse osmosis filter element and the 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 water storage device, the second water outlet is communicated to the second end of the water return pipeline, the water path control device is used for controlling the communication state of the water inlet and the first water outlet and the second water outlet respectively, and the first end of the water return pipeline is communicated to the water inlet of the booster pump. Therefore, the user is prevented from accessing the first section of water with higher TDS, and the use experience of the user is improved. The first section water with higher TDS can also reenter the reverse osmosis filter element to filter again, reduces the waste of water resource. The water path control device can also improve the expandability of the water purifier.

Description

Water purifier

Technical Field

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

Background

With the pursuit of the public for quality of life, the water quality is getting more attention. 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 solve the problem that exists among the prior art at least partially, the utility model provides a water purifier, it is including communicateing to the main water pipeline of delivery port, and main water pipeline includes booster pump and the reverse osmosis filter core that sets gradually along the rivers direction, and the water purifier still includes: the water storage device is communicated to a main water pipeline between the reverse osmosis filter element and the 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 water storage device, the second water outlet is communicated to the second end of the water return pipeline, the water path control device is used for controlling the communication state of the water inlet and the first water outlet and the second water outlet respectively, and the first end of the water return pipeline is communicated to the 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 control 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 control 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 storage device. 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. Finally, the control mode of the water path control device is flexible, so that the control logic of the water purifier has multiple possibilities, and the expandability of the water purifier is improved.

The water storage device is exemplarily a pressure barrel including a water storage chamber and a pressure chamber, the water storage chamber being capable of changing volume according to pressure, and the water storage chamber being communicated to the main water line.

Therefore, the water purifier with the pressure barrel is simpler in water path structure, fewer in devices on the water path, and capable of reducing water leakage risks and reducing product cost.

Illustratively, the waterway control device includes a first solenoid valve and a second solenoid valve connected in parallel, the first solenoid valve being communicated between the water inlet and the first water outlet, the second solenoid valve being 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 control 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.

Because the waterway control device is in the switching process, at some moment, the water inlet, the first water outlet and the second water outlet are all in a communicated state. Therefore, the pure water port of the reverse osmosis filter element is communicated with the water inlet of the water purifier, so that the pressure of the water outlet of the water purifier fluctuates, and the phenomenon of discontinuous water outlet is caused. Therefore, the first one-way valve can prevent the pressure fluctuation phenomenon generated in the switching process of the water path control device, and the use experience of a user is improved.

Illustratively, the water purifier also comprises a main control circuit which is electrically connected with the water path control device, and the main control circuit controls the water path control device to change the water inlet from being communicated with the second water outlet only to being communicated with the first water outlet only after a preset time period after receiving an electric signal which is used for indicating the start of water outlet and is sent by the water outlet control device or according to the detection signal received by the detection device.

Therefore, the water purifier with the main control circuit can better control the booster pump, the water channel control device and the like, and can adjust and set the preset threshold values of the water channel switching and communicating water channels of the water channel control device through the main control circuit, such as the preset time period, the preset total dissolved solid threshold value, the preset total pure water threshold value and the like, so that the logical relation among the devices in the water purifier is simplified.

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 main control circuit.

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

It can be seen from this that, by using the detection result of the water quality detector, the water inlet of the water passage control device is controlled to communicate with only the first water outlet at a proper time. 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 is also avoided, but the water inlet is only communicated with the first water outlet, so that a user can acquire 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 control 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 purifier includes the flowmeter for detecting the pure water total amount that reverse osmosis filter made, and the flowmeter electricity is connected master control circuit to as detection device to main control circuit send the detected signal.

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 flow meter is arranged between a pure water port of the reverse osmosis filter element and a water inlet of the water path control 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.

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. 1-4 are schematic water paths of a water purifier according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

101. a water inlet; 102. a water outlet; 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; 300. a water storage device; 310. a water storage cavity; 320. a pressure chamber; 400. a water return pipeline; 410. a first check valve; 500. a waterway control 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, an embodiment of the present invention provides a water purifier, 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 faucet, a pipeline machine, and other devices. The water purifier 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 is used to increase the pressure of water in the downstream pipeline and device, so that the water with a certain pressure passes through the reverse osmosis filter element 220, and is filtered by the reverse osmosis filter element 220 to generate pure drinkable water. Pure water filtered by the reverse osmosis filter element 220 may flow out through the water outlet 102.

The water purifier further comprises a water storage device 300, and the water storage device 300 is communicated to the main water pipeline 200 between the reverse osmosis filter element 220 and the water outlet 102. The water storage device 300 may be a water tank, a pressure tank, or the like. The water storage device 300 is used for storing the pure water prepared in advance by the water purifier. When the user opens the water outlet device to take water, the user can firstly receive the pure water in the water storage device 300, so that the time for the user to wait for the water purifier to prepare the pure water can be reduced.

The water purifier further comprises a water return pipeline 400 and a water path control device 500. A first end of the water return pipe 400 is connected to a water inlet of the booster pump 210, and a second end of the water return pipe 400 is connected to the main water pipe 200 via the water control device 500.

The waterway control 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, and the first water outlet 502 is connected to the water storage device 300. The waterway control device 500 can control the communication state of the water inlet 501 with the first water outlet 502 and the second water outlet 503. After entering the water path control device 500, the pure water generated by filtering may flow through two water paths, or flow to the water storage device 300 or the water outlet 102 of the water purifier via the first water outlet 502, or flow back to the water inlet of the booster pump 210 via the second water outlet 503 and the water return pipe 400. As shown in the figure, the second end of the water return pipe 400 and the second water outlet 503 may be the same water gap.

For example, the standby state of the water purifier 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 will complete the water purifying operation and enter a standby state to wait for the next water purifying operation. When the water purifier enters the standby state, the booster pump 210 is turned off, the water in the water storage device 300 is in a full water state, and the water inlet 501 of the water path control device 500 may be communicated with the first water outlet 502 and/or the second water outlet 503. Alternatively, the water inlet 501 may be in a completely blocked state without communicating with any water outlet.

When the user takes water, the booster pump 210 is activated, and the water inlet 501 of the waterway control device 500 can communicate with the second water outlet 503. If the waterway control device 500 is in this communication state while in standby, it continues to maintain the communication state for a predetermined period of time. If the communication state is different therefrom in the standby state of the waterway control device 500, it may be changed to the communication state and maintained for a predetermined period of time. The predetermined period of time has a duration T, which may be preset empirically. During the predetermined time period, the user can access the pure water prepared in advance in the water storage device 300 through the water outlet device communicated with the water outlet 102.

In the predetermined time period, the booster pump 210 presses the raw water into the reverse osmosis filter element 220, 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 water path control device 500 due to the higher TDS of diffusion. Since the first end of the water return line is connected to the water inlet of the booster pump 210, the water in the water return line 400 and the water from the water inlet 101 enter the booster pump 210 again, and are 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 above-mentioned predetermined time period, because water inlet 501 of waterway control device 500 only communicates with second delivery port 503, so, when standing by for a long time, the reverse osmosis filter core 220 membrane back can not be directly received by the user because the water that diffusion effect has higher TDS, and the water that the user received is only discharged by water storage device 300 to the first section water that has high TDS that the user produced has been avoided receiving to get, has improved user's use experience. 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 water intake time of the user reaches the predetermined time period, the water path control device 500 switches to the water inlet 501 to be communicated with the first water outlet 502 only, and at this time, the pure water prepared by the booster pump 210 and the reverse osmosis filter element 220 flows to the water outlet 102 together with the water (if any) in the water storage device 300 to be taken by the user.

Until the user stops taking water, the waterway control device 500 keeps the water inlet 501 communicating only with the first water outlet 502. After the user stops getting water, the water purifier will first fill the water storage device 300. Then, the booster pump 210 is turned off, and a standby state is entered. Alternatively, when entering the standby state, the water inlet 501 of the waterway control device may be conducted with the second water outlet 503 to prepare for the next water getting operation of the user.

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 control device 500 maintains the state where the water inlet 501 and the second water outlet 503 are communicated for the predetermined period of time. When the above-mentioned predetermined period of time is reached, the water inlet 501 is changed from communicating with only the second water outlet 503 to communicating with only the first water outlet 502 to store the pure water purified by the reverse osmosis cartridge 220 into the water storage device 300 for the next water intake. After the water storage device 300 is filled, the booster pump 210 is turned off and the system enters a standby state. Optionally, at this time, the water inlet 501 of the waterway control device 500 is communicated with the second water outlet 503; of course, at this time, the waterway control device 500 may close all the water ports, and the usage effect is not affected.

The timely waterway switching of the waterway control device 500 can be realized in various ways, for example, a time delay device can be arranged in the water purifier, or the waterway control device can be controlled by a main control circuit, 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 adjust according to the length of the relevant water route of purifier and pipeline latus rectum.

The waterway control device 500 may also have various structures, for example, two electromagnetic valves connected in parallel; or a one-inlet two-outlet electromagnetic valve can be arranged to realize the functions.

The water storage device 300 may be a water tank, a pressure tank, or the like. In the case of the water storage device 300 being a water tank, a suction pump is further provided between the water tank and the main water line 200 to discharge water in the water tank. For detecting whether the water in the water tank is in a full water state, a weight detection device is arranged below the water tank to detect the weight of the water in the water tank, or a flow meter is arranged between the water tank and the water outlet 102 to judge the water level state in the water tank through flow calculation.

The water storage device 300 may be a pressure tank. The pressure barrel itself can complete the drainage process. The water path is simpler, and the cost of the water purifier is lower. Which will also be described in detail below.

Therefore, in the water purifier with the above structure, since the water path control device 500 and the water return pipeline 400 are provided, in a time period when a user starts to take water, water with a higher TDS in the reverse osmosis filter element 220 can flow back to the water inlet of the booster pump 210 through the water path control device 500 and the water return pipeline 400. The water taken by the user at this time is pure water prepared in advance in the water storage apparatus 300. 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. Finally, the control mode of the water path control device 500 is flexible, so that the control logic of the water purifier has multiple possibilities, and the expandability of the water purifier is improved.

In one embodiment, the water storage device 300 may be a pressure tank, and the pressure tank includes a water storage chamber 310 and a pressure chamber 320, wherein the volume of the water storage chamber 310 can be changed according to the pressure, the water storage chamber 310 is communicated with the main water line 200, and the water flow can be exchanged between the main water line 200 and the water storage chamber 310. The pressure chamber 320 is typically a bladder containing compressed air and may vary in volume depending on the pressure within the water storage chamber 310. When the user opens the faucet, the water storage chamber 310 is communicated with the atmosphere through the main water line 200, and the pressure chamber 320 presses the water storage chamber 310 to discharge the water in the water storage chamber 310. In the process of storing water in the pressure barrel by the water purifier, the volume of the water in the water storage cavity 310 is increased continuously, and the pressure cavity 320 is gradually pressed, so that the pressure in the pressure barrel and the pressure in the main water pipeline 200 are increased. If the high-pressure switch 230 is provided in the main water line 200, the water purifier can be controlled by the pressure in the line.

Therefore, the water purifier with the pressure barrel is simpler in water path structure, fewer in devices on the water path, and capable of reducing water leakage risks and reducing product cost.

In one embodiment, as shown in fig. 1, the waterway control device 500 of the water purifier includes 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 described above 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 described above. Alternatively, the first solenoid valve 510 and the second solenoid valve 520 may not have an interlocking relationship but may be controlled separately.

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.

In another embodiment, referring to FIG. 2, the waterway control 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 with the one-inlet two-outlet electromagnetic valve 530 can reduce the space occupied by the electromagnetic valve, reduce the size of the water purifier, and improve the integration level of the water channel.

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 of the return pipe 400 to the first end 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 control 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 a communication 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, so that the pressure of the water outlet 102 of the water purifier 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 control device 500, thereby improving the user experience.

Illustratively, the water purifier may include a main control circuit electrically connected to the waterway control device 500, and the main control circuit controls the waterway control device 500 to change the water inlet 501 from communicating only with the second water outlet 503 to communicating only with the first water outlet 502 when receiving an electric signal from the water outlet control device indicating that water is to be discharged, for a predetermined time period T, or according to a detection signal received from the detection device. The master control circuit may be implemented in an integrated circuit chip.

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 main control circuit. Specifically, the high pressure switch 230 may be provided on the main water line 200 downstream of the water storage device 300. If the main water line 200 is provided with the high pressure switch 230, the user can take water through a mechanical faucet connected behind the high pressure switch 230. For example, when the water purifier is in a standby state, the booster pump 210 is turned off, the water inlet 501 of the water path control device 500 may be communicated with only the second water outlet 503, the high pressure exists in the main water pipeline 200 from the first water outlet 502 of the water path control device 500 to the mechanical faucet, and the high pressure switch 230 is in an off state.

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 main control circuit. After receiving the electrical signal, the main control circuit controls the booster pump 210 to start. The water in the water storage device 300 is discharged to the mechanical faucet, and the booster pump 210 circulates the water before the water path control device 500 and filters the water by the reverse osmosis filter element 220 to reduce the TDS value of the water after the reverse osmosis membrane.

When the preset time period T is reached, the main control circuit controls the water inlet 501 of the waterway control device 500 to be communicated with only the first water outlet 502. At this time, if the user is still getting water, the water that the user gets from the mechanical faucet may include the pure water discharged from the water storage device 300, and also include 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 storage device 300 until the water storage device 300 is full of water and the main water pipeline 200 is filled with high-pressure water, the high-pressure switch 230 is turned off, and an electric signal for finishing water outlet is sent to the main control circuit, which can control the water inlet 501 of the water channel control device 500 to be communicated with the second water outlet 503 only, so that the water purifier enters a standby state.

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

In another embodiment, the water outlet control device of the water purifier can be an electric control faucet, and the main control circuit can be used for being electrically connected to the electric control 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 can directly send an electrical signal to the main control circuit indicating the beginning of water discharge and an electrical signal indicating the end of water discharge. The main control circuit controls the booster pump 210, the water path control device 500, and the like according to the received electric signal. The logic relation between the main control circuit and each execution device in the water purifier is effectively simplified.

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

In one embodiment, as illustrated in fig. 3, the water purifier includes a 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 main control circuit to serve as a detection device to send a detection signal to the main control circuit. When the main control circuit 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 water control device 500 is controlled, so that the water inlet 501 of the water control device 500 is timely changed to be communicated with the first water outlet 502 only.

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 a standard value or a preset value, the waterway control device 500 communicates the water inlet 501 with only the second water outlet 503, or maintains a state in which the water inlet 501 communicates with only 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 main control circuit controls the water path control device 500 to communicate the water inlet 501 with the first water outlet 502 only.

From this, it is understood that the water inlet 501 of the water passage control device 500 is controlled to communicate with only the first water outlet 502 at a proper time 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 is also avoided, but the water inlet 501 is only communicated with the first water outlet 502, so that a user can obtain water with high TDS and the use experience of the user is influenced.

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 control device 500. In the water intake starting stage, the water inlet 501 of the waterway control device 500 is communicated with only the second water outlet 503, and once the water quality passing through the water quality detector 610 is detected to be qualified, the waterway control device 500 changes the water inlet 501 to be communicated with only 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, the water purifier may further 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 main control circuit to serve as a detection device to send a detection signal to the main control circuit. After receiving a detection signal sent when the total amount of pure water flowing through the main control circuit detected by the flow meter 620 is greater than or equal to a preset total amount of pure water threshold, the main control circuit controls the water path control device 500 to enable the water inlet 501 of the water path control device 500 to be communicated with only the first water outlet 502 at any time.

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 fluid flowing through the flow meter 620 is equal to or greater than a preset total pure water threshold value, the water inlet 501 communicates only 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 disposed between the pure water port 221 of the reverse osmosis filter element 220 and the water inlet 501 of the waterway control 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 basis to the extension of the function of purifier.

Therefore, the water purifier with the main control circuit can better control the booster pump 210, the water path control device 500 and the like, and can adjust and set the preset threshold values of the water path control device 500 for switching and communicating the water paths, 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 main control circuit, so that the logical relationship among the devices in the water purifier is simplified.

The water purifier may also be provided with a pre-filter element, a water inlet solenoid valve, a concentrated water solenoid valve and other devices, and the connection relationship and the use principle of the devices 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 (11)

1. A water purifier comprises a main water pipeline (200) communicated to a water outlet (102), the main water pipeline comprises a booster pump (210) and a reverse osmosis filter element (220) which are sequentially arranged along the water flow direction, and the water purifier is characterized in that,

the water purifier further comprises:

a water storage device (300) communicated to the main water pipeline between the reverse osmosis filter element and the water outlet;

the reverse osmosis filter comprises a water return pipeline (400) and a water path control device (500), wherein the water path control 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 port (221) of the reverse osmosis filter element, the first water outlet is communicated to the water storage device, the second water outlet is communicated to the second end of the water return pipeline, the water path control device is used for controlling the communication state of the water inlet and the first water outlet and the second water outlet respectively, and the first end of the water return pipeline is communicated to the water inlet of the booster pump.

2. The water purification machine according to claim 1, wherein the water storage means (300) is a pressure tank comprising a water storage chamber (310) and a pressure chamber (320) capable of varying volume according to pressure, said water storage chamber being connected to the main water line (200).

3. The water purifier according to claim 1, wherein said water circuit control 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 communicating between said water inlet and said second water outlet (503).

4. The water purification machine according to claim 1, wherein said water circuit control means (500) comprises a two-in and two-out solenoid valve (530), the water inlet of said one-in and two-out solenoid valve being connected to said water inlet (501), the two water outlets of said one-in and two-out solenoid valve being connected to said first water outlet (502) and said second water outlet (503), respectively.

5. The water purifier as recited in claim 1, characterized in that a first one-way valve (410) is further disposed on the return pipe (400), and the first one-way valve is conducted from the second end of the return pipe to the first end of the return pipe.

6. The water purification machine according to any one of claims 1 to 5, further comprising a main control circuit electrically connected to said water circuit control means (500), said main control circuit controlling said water circuit control means to change said water inlet (501) from communicating only with said second water outlet (503) to communicating only with said first water outlet (502) after a predetermined time period following receipt of an electrical signal from said water outlet control means indicating the start of water outlet or upon receipt of a detection signal from said detection means.

7. The water purifier according to claim 6, wherein the water outlet control device is a high voltage switch (230) arranged on the main water pipeline (200), and the high voltage switch is electrically connected to the main control circuit.

8. The water purification machine according to claim 6, wherein said water purification machine comprises a water quality detector (610) for detecting the total amount of soluble solids of the pure water produced by said reverse osmosis cartridge (220), said water quality detector being electrically connected to said main control circuit for sending said detection signal to said main control circuit as said detection means.

9. The water purification machine according to claim 8, 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 water circuit control device (500) or on said water return line (400).

10. The water purifier as recited in claim 6, comprising a flow meter (620) for detecting a total amount of pure water produced by said reverse osmosis filter element (220), said flow meter being electrically connected to said main control circuit for sending said detection signal to said main control circuit as said detection means.

11. The water purification machine according to claim 10, 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 water circuit control device (500) or on the water return line (400).

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