Water purifier

Abstract

The utility model provides a water purifier which comprises a pure water main path, a pure water branch path and a check valve, the pure water branch path is connected to the pure water main path, a first pure water outlet is formed in one end of the pure water main path, a second pure water outlet is formed in one end, deviating from the pure water main path, of the pure water branch path, and the check valve is arranged on the pure water branch path. According to the utility model, the pure water branch is connected to the pure water main path, the first pure water outlet is formed at one end of the pure water main path and can be applied to a kitchen terminal, and the second pure water outlet is formed at one end, deviating from the pure water main path, of the pure water branch and can be applied to terminals outside a kitchen. The water distribution port interface is reserved in advance, and for a user who needs to add a water distribution port outside a kitchen, only other terminals need to be in butt joint with the second pure water outlet, so that the whole machine does not need to be moved out to modify and add the water distribution port interface, and the trouble in the modification process is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of purifying water, and particularly relates to a water purifier. BACKGROUND

[0002] With the popularization of the concept of healthy drinking water, the use scene of the water purifier becomes more diversified. Moreover, due to the popularization of the intelligence of the water purifier, most water purifiers are matched with intelligent touch faucets to take water, which solves the inconvenience of rotating the handle. In addition, the mainstream water purifier design on the market only considers the use scene of the kitchen terminal, and it is very inconvenient for users who need to add a water distribution port outside the kitchen. After-sales service needs to make corresponding modifications to the water purifier to add a water distribution port interface. When modifying, the whole machine needs to be moved out, and joint switching and maintenance need to be performed, which is difficult and complicated for after-sales operation. SUMMARY

[0003] Therefore, the utility model provides a water purifier, which can solve the technical problems that the whole machine needs to be moved out for joint switching and maintenance when adding a water distribution port interface to the existing water purifier, and after-sales operation is difficult and complicated.

[0004] In order to solve the above problems, the utility model provides a water purifier, which comprises a pure water main line, a pure water branch line and a check valve, the pure water branch line is connected to the pure water main line, one end of the pure water main line forms a first pure water outlet, one end of the pure water branch line away from the pure water main line forms a second pure water outlet, and the check valve is arranged on the pure water branch line.

[0005] In some embodiments, a pressure sensor is arranged on the pure water branch line, and the pressure sensor is between the check valve and the second pure water outlet; and / or, the check valve comprises a valve core in the pure water branch line, the valve core has a conductive position for conducting the pure water branch line and a cutoff position for cutting off the pure water branch line, and along the water flow direction of the pure water branch line, when the pressure on the upstream side of the valve core is greater than the pressure on the downstream side of the valve core, the valve core is in the conductive position, and when the pressure on the upstream side of the valve core is less than the pressure on the downstream side of the valve core, the valve core is in the cutoff position.

[0006] In some embodiments, the pure water branch line comprises a first pipe segment and a second pipe segment, the second pipe segment is connected to the pure water main line through the first pipe segment, an angle is formed between the first pipe segment and the second pipe segment, one end of the second pipe segment away from the first pipe segment forms the second pure water outlet, a plug is arranged on one end of the first pipe segment away from the pure water main line, the valve core is in the first pipe segment, the check valve further comprises an elastic component connected to the valve core, and one end of the elastic component away from the valve core is connected to the plug.

[0007] In some embodiments, the valve core has a guide channel, and the elastic component has a partial segment in the guide channel.

[0008] In some embodiments, the valve core has a flow impact portion on a side of the valve core facing away from the elastic component, and a plurality of flow guide grooves are formed on the flow impact portion and are spaced apart along a circumference of the valve core.

[0009] In some embodiments, the flow impact portion includes a plurality of partitioning ribs, each of which is distributed along a circumference of the valve core, and a first side of each of the partitioning ribs is connected, and a flow guide groove is formed between adjacent two of the partitioning ribs.

[0010] In some embodiments, an inner wall of the first pipe segment has a step surface around the first pipe segment, and the check valve further includes a sealing ring sleeved on the valve core, and when the valve core is in the open position, the sealing ring has a spacing from the step surface, and when the valve core is in the closed position, the sealing ring abuts against the step surface.

[0011] In some embodiments, the valve core has a clamping groove around the valve core, and the sealing ring is clamped in the clamping groove.

[0012] In some embodiments, a plurality of pure water branch lines are connected to the pure water branch line, and each of the pure water branch lines has an end connected to the pure water branch line between the check valve and the pressure sensor, and an end of the pure water branch line facing away from the pure water branch line forms a third pure water outlet.

[0013] In some embodiments, a first electromagnetic valve is arranged on the pure water main line, and the first electromagnetic valve is between the first pure water outlet and the pure water branch line.

[0014] The water purifier has the following beneficial effects:

[0015] Since the application connects the pure water branch line on the pure water main line, the first pure water outlet is formed at one end of the pure water main line and can be applied to the kitchen terminal, and the second pure water outlet is formed at the end of the pure water branch line away from the pure water main line and can be applied to the terminal outside the kitchen. This is equivalent to reserving the water distribution port interface in advance. For users who need to add water distribution ports outside the kitchen, they only need to dock and install other terminals with the second pure water outlet, so that the machine does not need to be moved out for modification and addition of water distribution port interfaces, and the trouble in the modification process is saved. At the same time, the check valve has the function of controlling the opening and closing of the pure water branch line. When the pure water branch line is not connected to the terminal outside the kitchen, the check valve blocks the pure water branch line, so that the first pure water outlet can flow out, and the second pure water outlet cannot flow out. When the pure water branch line is connected to the terminal outside the kitchen, after the water distribution port of the terminal is opened, the pure water can impact the check valve to realize the water flow of the terminal outside the kitchen. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0017] Figure 1 It is a schematic diagram of the water purifier of the embodiment of the present application;

[0018] Figure 2 It is a sectional view of the water purifier of the embodiment of the present application;

[0019] Figure 3 It is a schematic diagram of the check valve of the water purifier of the embodiment of the present application;

[0020] Figure 4 It is a schematic diagram of the water purifier of the embodiment of the present application from another perspective;

[0021] Figure 5 It is a schematic diagram of the appearance of the water purifier of the embodiment of the present application;

[0022] Figure 6 It is a schematic diagram of the water purifier in the prior art;

[0023] Figure 7 It is a sectional view of the water purifier in the prior art;

[0024] Figure 8 It is a schematic diagram of the water purifier in the prior art from another perspective;

[0025] Figure 9 It is a schematic diagram of the appearance of the water purifier in the prior art.

[0026] Reference signs are indicated as:

[0027] 1, pure water main road; 2, pure water branch; 21, first pipe section; 22, second pipe section; 3, check valve; 31, valve core; 32, elastic part; 33, incoming flow impact part; 34, sealing ring; 4, pressure sensor; 5, first pure water outlet; 6, second pure water outlet; 7, plug; 8, guide channel; 9, step surface; 10, clamping groove; 11, first electromagnetic valve; 12, raw water inlet; 13, waste water outlet; 14, pure water inlet; 15, composite filter element; 16, second electromagnetic valve; 17, pressure stabilizing pump; 18, reverse osmosis membrane filter element; 19, third electromagnetic valve; 20, clean water end faucet; 23, waterway main plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0030] For ease of description, spatial relative terms such as "on", "above", "upper surface", "upper", and the like can be used herein to describe the spatial relationship between one device or feature to another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, the device described as "above" or "on" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations) and the spatial relative descriptions used herein interpreted accordingly.

[0031] In addition, it should be noted that the use of the terms "first", "second", and the like to describe various components is merely intended to differentiate one component from another, and such terms do not have special meanings unless otherwise stated. Therefore, they cannot be construed as limiting the scope of protection of the utility model.

[0032] For reference Figures 1 to 9 As shown in the drawings, according to the embodiment of the utility model, a water purifier is provided, which comprises a pure water main line 1, a pure water branch line 2, a check valve 3 and a pressure sensor 4. The pure water branch line 2 is connected to the pure water main line 1. One end of the pure water main line 1 forms a first pure water outlet 5. One end of the pure water branch line 2 away from the pure water main line 1 forms a second pure water outlet 6. The check valve 3 and the pressure sensor 4 are both arranged on the pure water branch line 2, and the pressure sensor 4 is between the check valve 3 and the second pure water outlet 6.

[0033] In the technical scheme, the pure water branch line 2 is connected to the pure water main line 1. One end of the pure water main line 1 forms the first pure water outlet 5 which can be applied to a kitchen terminal. One end of the pure water branch line 2 away from the pure water main line 1 forms the second pure water outlet 6 which can be applied to a terminal other than the kitchen. This is equivalent to reserving a water distribution port interface in advance. For a user who needs to add a water distribution port outside the kitchen, the user only needs to connect and install the other terminal to the second pure water outlet 6. In this way, the user does not need to move the entire machine to add a water distribution port interface, and the user does not need to be bothered during the modification process. At the same time, the check valve 3 has the function of controlling the on-off of the pure water branch line 2. When the pure water branch line 2 is not connected to the terminal outside the kitchen, the check valve 3 blocks the pure water branch line 2, so that the first pure water outlet 5 can output water, and the second pure water outlet 6 cannot output water. When the pure water branch line 2 is connected to the terminal outside the kitchen, the water distribution port of the terminal is opened, and the pure water can impact the check valve 3, so that the terminal outside the kitchen can output water.

[0034] In the embodiment, the pressure sensor 4 is added to remotely control the on-off of the pure water branch 2. When the terminal water distribution port outside the kitchen is opened, the pressure sensor 4 detects the pressure relief of the pure water branch 2 and sends a signal to the water circuit mainboard 23 of the water purifier, and the water circuit mainboard 23 controls the starting of the pressure stabilizing pump 17 after receiving the signal, and the purified pure water flows into the pure water branch 2 and impacts the check valve 3, so as to realize the water outlet of the terminal outside the kitchen. When the terminal water distribution port outside the kitchen is closed, the pressure sensor 4 detects the pressure relief of the pure water branch 2 and sends a signal to the water circuit mainboard 23 of the water purifier, and the water circuit mainboard 23 controls the stopping of the pressure stabilizing pump 17 after receiving the signal, and the high pressure formed by the pressure relief makes the check valve 3 block the pure water branch 2, so as to realize the stopping of the water outlet of the terminal water distribution port outside the kitchen. That is, the water purifier of the present application not only realizes the demand of the user for the terminal water distribution port outside the kitchen, but also realizes the remote control of the terminal water distribution port outside the kitchen, which brings great convenience to the user and makes the user have a good experience. The terminal water distribution port outside the kitchen can be arranged in the living room or the room.

[0035] Referring to FIGS. 1 and 2, Figure 2 and Figure 3 As shown in FIGS. 1 and 2, the check valve 3 includes a valve core 31 in the pure water branch 2, the valve core 31 has a conductive position for conducting the pure water branch 2 and a cutoff position for cutting off the pure water branch 2, and along the water flow direction of the pure water branch 2, when the pressure on the upstream side of the valve core 31 is greater than the pressure on the downstream side of the valve core 31, the valve core 31 is in the conductive position, and when the pressure on the upstream side of the valve core 31 is less than the pressure on the downstream side of the valve core 31, the valve core 31 is in the cutoff position.

[0036] In the embodiment, the side of the valve core 31 facing the flow of the pure water branch 2 is the upstream side of the valve core 31, and the side of the valve core 31 facing away from the flow of the pure water branch 2 is the downstream side of the valve core 31. When the terminal water distribution port outside the kitchen is opened, the downstream side of the valve core 31 is relieved to become a low pressure side, and at the same time, the starting of the pressure stabilizing pump 17 makes the upstream side of the valve core 31 become a high pressure side. When the pressure on the upstream side of the valve core 31 is greater than the pressure on the downstream side of the valve core 31, the valve core 31 is in the conductive position, and the automatic water outlet of the terminal water distribution port outside the kitchen can be realized. When the terminal water distribution port outside the kitchen is closed, the downstream side of the valve core 31 is pressurized to become a high pressure side, and at the same time, the stopping of the pressure stabilizing pump 17 makes the upstream side of the valve core 31 become a low pressure side. When the pressure on the upstream side of the valve core 31 is less than the pressure on the downstream side of the valve core 31, the valve core 31 is in the cutoff position, and the stopping of the water outlet of the terminal water distribution port outside the kitchen can be realized when the terminal water distribution port outside the kitchen is closed. It can be understood that the movement switching of the valve core 31 between the conductive position and the cutoff position is realized by the pressure difference.

[0037] Referring to FIGS. 1 and 2, Figure 2As shown in the figure, the pure water branch 2 comprises a first pipe section 21 and a second pipe section 22, the second pipe section 22 is connected with the pure water main line 1 through the first pipe section 21, and the first pipe section 21 and the second pipe section 22 form an included angle, the second pipe section 22 forms a second pure water outlet 6 at an end away from the first pipe section 21, a plug 7 is arranged at an end of the first pipe section 21 away from the pure water main line 1, the valve core 31 is in the first pipe section 21, and the check valve 3 further comprises an elastic component 32 connected with the valve core 31, and an end of the elastic component 32 away from the valve core 31 is connected with the plug 7.

[0038] In the technical scheme, the pure water branch 2 comprises the first pipe section 21 and the second pipe section 22, so that the check valve 3 is conveniently arranged in the first pipe section 21. Meanwhile, the end of the first pipe section 21 away from the pure water main line 1 is plugged by the plug 7, which not only realizes the sealing of the first pipe section 21, but also facilitates the installation of the elastic component 32, so that one end of the elastic component 32 is fixed on the plug 7, and the other end of the elastic component 32 is fixed on the valve core 31. The elastic component 32 has a primary compression state and a secondary compression state, when the valve core 31 is in the conducting position, the elastic component 32 is in the primary compression state, when the valve core 31 is in the cutting-off position, the elastic component 32 is in the secondary compression state, and the compression degree of the elastic component 32 in the primary compression state is stronger than that of the elastic component 32 in the secondary compression state. Therefore, the addition of the elastic component 32 helps the valve core 31 to switch from the conducting position to the cutting-off position. The elastic component 32 can be a spring.

[0039] Referring to Figure 3 As shown in the figure, the valve core 31 has a guide channel 8, and the elastic component 32 has a partial section in the guide channel 8. When the valve core 31 switches between the conducting position and the cutting-off position, the valve core 31 drives the elastic component 32 to elongate and shorten, and the elastic component 32 will be skewed if its circumference is not limited during the elongation and shortening, so that the position of the valve core 31 is inaccurate. By making the elastic component 32 have a partial section in the guide channel 8, the elastic component 32 is guided, so that the elastic component 32 only displaces along the water flow direction during the elongation and shortening, thereby ensuring the position accuracy of the valve core 31 when switching between the conducting position and the cutting-off position. It should be noted that the end of the elastic component 32 away from the plug 7 is fixed on the bottom wall of the guide channel 8.

[0040] Referring to Figure 7 As shown in the figure, the valve core 31 has a flow impact portion 33, the flow impact portion 33 is on the side of the valve core 31 away from the elastic component 32, a plurality of flow guide grooves are formed on the flow impact portion 33, and the flow guide grooves are spaced apart along the circumference of the valve core 31.

[0041] In the embodiment, the flow-impingement part 33 faces the flow direction of the pure water in the pure water branch 2, and thus the pure water impinges on the flow-impingement part 33 to switch the valve core 31 from the cut-off position to the on position. When a plurality of flow-guiding grooves are formed on the flow-impingement part 33 in the circumferential direction, the pure water can be divided into a plurality of streams along the flow-guiding grooves, and thus the valve core 31 can be subjected to a plurality of impingement forces in the circumferential direction, which helps to make the force on the valve core 31 uniform and thus helps to accurately switch the valve core 31 between the on position and the cut-off position.

[0042] As a specific implementation, the flow-impingement part 33 includes a plurality of partitioning ribs, each of which is distributed in the circumferential direction of the valve core 31 and has a first side connected to the first side of an adjacent partitioning rib.

[0043] In the technical solution, when the flow-impingement part 33 is formed by a plurality of partitioning ribs distributed in the circumferential direction and having the first sides connected, the flow-impingement part 33 can be integrally injection molded with the valve core 31, which facilitates processing.

[0044] Referring to Figure 2 As shown in the figure, the inner wall of the first pipe section 21 is formed with a step surface 9 surrounding the first pipe section 21, and the check valve 3 further includes a sealing ring 34 sleeved on the valve core 31. When the valve core 31 is in the on position, the sealing ring 34 has a spacing from the step surface 9, and when the valve core 31 is in the cut-off position, the sealing ring 34 abuts against the step surface 9.

[0045] In the embodiment, the first pipe section 21 has a first flow passage and a second flow passage, the first flow passage is communicated with the second pipe section 22 through the second flow passage, and the inner diameter of the second flow passage is greater than that of the first flow passage, and thus the inner wall of the first pipe section 21 is formed with the step surface 9 surrounding the first pipe section 21. When the valve core 31 is in the on position, the sealing ring 34 has a spacing from the step surface 9, and thus the first pipe section 21 is in the on position; when the valve core 31 is in the cut-off position, the sealing ring 34 abuts against the step surface 9, and thus the first pipe section 21 is in the cut-off position. The sealing ring 34 ensures the sealing of the check valve 3 to the pure water branch 2 when the valve core 31 is in the cut-off position.

[0046] Referring to Figure 3 As shown in the figure, the valve core 31 is formed with a clamping groove 10 surrounding the valve core 31, and the sealing ring 34 is clamped in the clamping groove 10.

[0047] In the technical solution, the structure of the clamping groove 10 makes the sealing ring 34 more stable when assembled on the valve core 31, and thus ensures that the sealing ring 34 will not be out of position when abutting against the step surface 9, and thus ensures the sealing of the sealing ring 34 to the first pipe section 21.

[0048] As a specific embodiment, a plurality of pure water branches (not shown in the figure) are connected to the pure water branch 2, and the end of each pure water branch connected to the pure water branch 2 is between the check valve 3 and the pressure sensor 4. The end of the pure water branch away from the pure water branch 2 forms a third pure water outlet.

[0049] In the embodiment, when each pure water branch is applied to other terminals, since the end of each pure water branch connected to the pure water branch 2 is between the check valve 3 and the pressure sensor 4, each pure water branch is in communication with the pure water branch 2, so that the remote control of whether the water is discharged from each terminal can be realized by using a set of check valve 3 and pressure sensor 4.

[0050] Referring to Figure 1 As shown in the figure, the first electromagnetic valve 11 is arranged on the pure water main line 1, and the first electromagnetic valve 11 is between the first pure water outlet 5 and the pure water branch 2.

[0051] In the technical scheme, the purified water end faucet 20 is installed at the first pure water outlet 5, and the first electromagnetic valve 11 is arranged in the purified water end faucet 20. The intelligent touch water taking of the water purifier can be realized by arranging the first electromagnetic valve 11. The specific process is as follows: after the touch water taking button is pressed, the first electromagnetic valve 11 is turned on and sends a signal to the water circuit mainboard 23, and the water circuit mainboard 23 controls the starting of the pressure stabilizing pump 17 after receiving the signal. The purified pure water flows through the pure water main line 1 and is finally discharged from the purified water end faucet 20. It can be understood that, by arranging the first electromagnetic valve 11 on the pure water main line 1 and arranging the check valve 3 and the pressure sensor 4 on the pure water branch 2, the water discharge of the first pure water outlet 5 and the second pure water outlet 6 does not interfere with each other, and the control modes of the two are different, so that the bidirectional control of the water purifier and the terminal is finally realized.

[0052] It should be noted that the water purifier also has a raw water inlet 12 and a waste water outlet 13, and the water purifier further comprises a composite filter element 15, a second electromagnetic valve 16, a pressure stabilizing pump 17, a reverse osmosis membrane filter element 18, and a third electromagnetic valve 19. As Figure 1 As shown in the figure, under the conditions that the second electromagnetic valve 16 and the third electromagnetic valve 19 are turned on and the pressure stabilizing pump 17 is started, the raw water entering through the raw water inlet 12 firstly flows through the composite filter element 15 for primary filtration, then flows through the second electromagnetic valve 16 and the pressure stabilizing pump 17 to enter the reverse osmosis membrane filter element 18 for secondary filtration, and then flows into the composite filter element 15 again for filtration to finally obtain pure water. The pure water is sent to the pure water main line 1 through the pure water inlet 14. The waste water filtered by the reverse osmosis membrane filter element 18 is discharged through the third electromagnetic valve 19 and the waste water outlet 13.

[0053] It should be further noted that, in order to realize more efficient bidirectional control function, the application also provides a matching control system. The system comprises the following main modules:

[0054] Control module: responsible for receiving and processing control signals from the touch faucet or other terminal water distribution points. The control module can also identify user operation instructions and convert them into control signals (such as different water distribution point opening states, touch faucet end quantitative water control signals), and finally send them to the intelligent control valve to execute opening and closing of the pure water branch 2.

[0055] Communication module: The communication module is integrated in the whole machine end controller and is responsible for signal transmission. The communication module can use wired or wireless communication technology such as Wi-Fi, Bluetooth or Zigbee, etc. to ensure stable transmission of control signals. Through the communication module, users can remotely control the waterway assembly through terminal devices such as smartphones, tablets, etc.

[0056] Execution module: responsible for driving the control valve to execute corresponding actions. After receiving the control signal, the execution module will drive the intelligent control valve to open or close a specific water outlet to achieve precise control of water flow.

[0057] In actual use, users can achieve personalized water flow distribution through the following steps:

[0058] 1. Installation and connection: Connect the water inlet of the water purifier to the filtration system of the water purifier, and connect the water outlet to each water distribution point through the pipeline. Ensure that all connection points are sealed well to avoid water leakage.

[0059] 2. Configure the control system: Configure the parameters of the control system through the touch faucet or other terminal water outlets. Users can set the default state (open or closed) of each water outlet and set the control logic under specific scenarios.

[0060] 3. Remote control: Users can remotely control the water purifier through terminal devices such as smartphones, tablets, etc. For example, when the user is using water in the kitchen, they can turn off other water outlets through the phone to ensure sufficient water pressure in the kitchen. Real-time monitoring: The control system can monitor the status of each water outlet in real time and send notifications to users through terminal devices. If a water outlet fails or abnormally, the system will promptly remind the user to check and maintain.

[0061] Those skilled in the art will readily understand that the advantageous technical features of each of the above methods can be freely combined and superimposed without conflict.

[0062] The above merely is the preferred embodiment of the present application, and does not limit the present application, and any modification, equivalent replacement and improvement etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is merely the preferred embodiment of the present application, and it should be pointed out that, for the ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be considered as the protection scope of the present application.

Claims

1. A water purifier characterized by comprising: The pure water branch (2) is provided with a pressure sensor (4), the pressure sensor (4) is between the check valve (3) and the second pure water outlet (6); and / or, the check valve (3) comprises a valve core (31) in the pure water branch (2), the valve core (31) has a conduction position for conducting the pure water branch (2) and a cut-off position for cutting off the pure water branch (2), along the water flow direction of the pure water branch (2), when the pressure on the upstream side of the valve core (31) is greater than the pressure on the downstream side of the valve core (31), the valve core (31) is in the conduction position, when the pressure on the upstream side of the valve core (31) is less than the pressure on the downstream side of the valve core (31), the valve core (31) is in the cut-off position.

2. The water purifier according to claim 1, characterized in that, The pure water branch (2) comprises a first pipe section (21) and a second pipe section (22), the second pipe section (22) is connected with the pure water main (1) through the first pipe section (21), and an included angle is formed between the first pipe section (21) and the second pipe section (22), one end of the second pipe section (22) away from the first pipe section (21) forms the second pure water outlet (6), one end of the first pipe section (21) away from the pure water main (1) is provided with a plug (7), the valve core (31) is in the first pipe section (21), the check valve (3) further comprises an elastic component (32) connected with the valve core (31), one end of the elastic component (32) away from the valve core (31) is connected with the plug (7).

3. The water purifier according to claim 2, wherein The valve core (31) has a guide channel (8), and the elastic component (32) has a partial section in the guide channel (8).

4. The water purifier according to claim 3, wherein The valve core (31) has an incoming flow impact portion (33) on a side away from the elastic component (32), and a plurality of flow guide grooves are formed on the incoming flow impact portion (33) and are spaced apart along a circumference of the valve core (31).

5. The water purifier according to claim 3 or 4, characterized in that The incoming flow impact portion (33) comprises a plurality of partition ribs, each of the partition ribs is distributed along the circumference of the valve core (31), and a first side of each of the partition ribs is connected, and a flow guide groove is formed between adjacent two partition ribs.

6. The water purifier according to claim 5, wherein ​ 7. The water purifier according to claim 3, wherein The inner wall of the first pipe section (21) is formed with a step surface (9) surrounding the first pipe section (21), the check valve (3) further comprises a sealing ring (34) sleeved on the valve core (31), when the valve core (31) is in the open position, the sealing ring (34) has a spacing with the step surface (9), when the valve core (31) is in the cut-off position, the sealing ring (34) abuts against the step surface (9).

8. The water purifier according to claim 7, characterized in that The valve core (31) is formed with a clamping groove (10) surrounding the valve core (31), the sealing ring (34) is clamped in the clamping groove (10).

9. The water purifier according to claim 2, wherein A plurality of pure water branch lines are connected to the pure water branch line (2), one end of each of the pure water branch lines connected to the pure water branch line (2) is between the check valve (3) and the pressure sensor (4), and the other end of the pure water branch line away from the pure water branch line (2) forms a third pure water outlet.

10. The water purifier according to claim 1, characterized in that, The pure water main line (1) is provided with a first electromagnetic valve (11), and the first electromagnetic valve (11) is between the first pure water outlet (5) and the pure water branch line (2).

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