Water purifying device with pure water soaking function

Abstract

The invention discloses a water purification device with a pure water soaking function, and relates to the technical field of water purification, the water purification device comprises a filter and a pure water tank, and a three-way valve is mounted at a water inlet of the filter; one end of the three-way valve is connected with a pure water pipe which is fixedly provided with a water suction pump positioned in the pure water tank; a water inlet and a water outlet are formed in the pure water tank; a pure water outlet of the filter is communicated with the water inlet; a water outlet pipe communicated with the water outlet is mounted in the pure water tank. The pure water pipe communicated with the filter is arranged on the pure water tank, pure water is introduced into the filter, the RO membrane in the filter is cleaned, the buoy of the pure water tank can switch water paths, and the pure water in the pure water tank is automatically input into the filter through the water suction pump to soak the RO membrane when no one takes water. After the water yield in the pure water tank reaches a set value, raw water enters the filter, and concentrated water mixed with a large number of pollutants is discharged. The effect of soaking and cleaning the RO membrane through pure water is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purification, in particular to a water purification device with pure water soaking function. BACKGROUND

[0002] RO membrane, namely reverse osmosis membrane, is a high-efficiency water treatment technology, which can filter out most impurities in water to produce pure water. The working principle of RO membrane is based on the phenomenon of reverse osmosis. Under normal circumstances, water will permeate from a low-concentration solution to a high-concentration solution, while RO membrane forces pure water molecules in a high-concentration water solution to pass through the membrane in the opposite direction by applying an external force stronger than the natural osmotic pressure, thereby separating pure water from waste water. The pre-filtering elements such as PP cotton and activated carbon in the water purification device can filter out large particles first, thereby protecting the RO membrane. The RO membrane itself also needs to be cleaned regularly to remove pollutants attached to its surface. The cleaning methods include physical cleaning and chemical cleaning, and the physical cleaning includes forward flushing and back flushing. Back flushing has better effect, but causes greater damage to the RO membrane, so forward flushing is generally used for daily cleaning. Forward flushing uses high-flow clean water to form a high membrane surface flow rate, and flushes the surface of the reverse osmosis membrane under low pressure in a continuous or pulse water feeding mode, so as to carry away the pollutants attached to the membrane surface with high-speed water flow.

[0003] Currently, there are some studies on forward flushing of RO membrane. For example, the Chinese utility model patent with publication number CN220609852U discloses an RO membrane cleaning mechanism, which comprises a water pump and an inlet pipe of a cleaning water source; a first flushing pipeline connected with the water pump and a heat exchange device; a second flushing pipeline connected with the heat exchange device and an RO membrane device; a first branch pipe connected with the second flushing pipeline, which is sealingly connected with a sewage cavity of the RO membrane device; a second branch pipe connected with the second flushing pipeline, which is sealingly connected with a pure water cavity of the RO membrane device; the first branch pipe and the second branch pipe are opened and closed by a valve; and a high-pressure water pump can pump water for the RO membrane device.

[0004] In the prior art including the above patent, raw water is generally used to clean the RO membrane. The raw water itself contains certain impurities, and there is no soaking process before cleaning, so the pollutants on the surface of the RO membrane cannot be fully dissolved in water, and the removal effect of the pollutants is limited. Therefore, how to improve the removal effect of the pollutants on the surface of the RO membrane by daily forward flushing is a problem to be solved by those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a water purification device with pure water soaking function to solve the above problems in the prior art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a water purifying device with pure water soaking function, comprising a filter and a pure water tank, a three-way valve is installed at the inlet of the filter; one end of the three-way valve is connected with a pure water pipe, a water suction pump located in the pure water tank is fixedly installed on the pure water pipe; a water inlet and a water outlet are formed on the pure water tank, and the pure water outlet of the filter is communicated with the water inlet; a water outlet pipe communicated with the water outlet is installed in the pure water tank.

[0007] As a preferred technical scheme of the present application, two vertical guide columns are fixedly installed in the pure water pipe, a float is slidingly installed between the two guide columns in the vertical direction, a mounting plate is arranged on the float through a connecting line, and two conductive rods are fixedly installed on the mounting plate.

[0008] As a preferred technical scheme of the present application, a power supply for supplying power to the water suction pump is fixedly installed outside the pure water tank, a first conductor connected with the water suction pump and a second conductor connected with the power supply are fixedly installed in the pure water tank; when the float is located at the top of its stroke, the two ends of the conductive rod are respectively attached to the first conductor and the second conductor.

[0009] As a preferred technical scheme of the present application, an iron plate is fixedly installed on the top of the pure water tank, and a magnet column corresponding to the position of the iron plate is fixedly installed on the upper surface of the mounting plate.

[0010] As a preferred technical scheme of the present application, a base is fixedly installed on the top of the float, and a groove corresponding in shape and size to the mounting plate is formed on the upper surface of the base.

[0011] As a preferred technical scheme of the present application, a first rotating arm is installed on the three-way valve through a torsional spring, the first rotating arm is in a first state under no external force, in which state the three-way valve and the pure water pipe are not communicated; when the first rotating arm is subjected to an upward force, it rotates upward and enters a second state, in which state the three-way valve and the pure water pipe are communicated.

[0012] As a preferred technical scheme of the present application, a top support rod penetrating through the top of the pure water tank is fixedly installed on the float, and a roller corresponding to the position of the first rotating arm is rotatably installed on the top support rod.

[0013] As a preferred technical scheme of the present application, a horizontal limiting pin is fixedly installed on the side surface of the first rotating arm, a support is fixedly installed on the pure water pipe, and a second rotating arm for limiting the limiting pin is rotatably installed on the support.

[0014] As a preferred technical scheme of the present application, a lifting rod located below the second rotating arm is slidingly installed on the support in the vertical direction, a first horizontal part is formed on the lifting rod near the top thereof, and a telescopic spring in the vertical state is arranged between the first horizontal part and the support.

[0015] As a preferred technical scheme of the present application, a second horizontal part is formed on the lifting rod near the bottom thereof, a control arm is slidingly installed on the top supporting rod in a horizontal direction, and a horizontal round pin is installed on one end of the control arm.

[0016] In the above technical scheme, the water purifying device with pure water soaking function provided by the present application has the pure water pipe connected with the filter, and the pure water is introduced into the filter to clean the RO membrane in the filter, thus having better cleaning effect than raw water. In addition, the float is arranged in the pure water tank, and the float is vertically positioned by the buoyancy of the pure water, and the water path at the three-way valve is switched, so that the pure water in the pure water tank is automatically input into the filter by the water suction pump to soak the RO membrane when no one takes water at night. After soaking at night, when the user continuously takes water from the pure water tank, the water outlet of the pure water tank reaches a certain value, and the water path at the three-way valve is automatically switched, and the raw water is input into the filter to discharge the concentrated water mixed with a large amount of pollutants. In this way, the effect of soaking and cleaning the RO membrane by pure water is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 FIG. 1 is a first perspective view of the water purifying device with pure water soaking function in the embodiment;

[0019] Figure 2 FIG. 2 is an enlarged view of position A in FIG. 1; Figure 1

[0020] Figure 3

[0021] Figure 4 FIG. 3 is a second perspective view of the water purifying device with pure water soaking function in the embodiment;

[0022] Figure 5 FIG. 4 is an enlarged view of position B in FIG. 3; Figure 4

[0023] Figure 6 Figure 4

[0024] Figure 7 ​​​​​Figure 4 is a fourth perspective view of the water purifying device with a pure water soaking function in the embodiment.

[0025] Reference signs:

[0026] 1, filter; 2, pure water tank; 201, water inlet; 202, water outlet; 3, three-way valve; 4, pure water pipe; 5, water suction pump; 6, water outlet pipe; 7, guide column; 8, float; 9, connecting wire; 10, mounting plate; 11, conductive rod; 12, power supply; 13, first conductor; 14, second conductor; 15, iron plate; 16, magnet column; 17, base; 18, first rotating arm; 19, top support rod; 20, roller; 21, limit pin; 22, second rotating arm; 23, lifting rod; 24, extension spring; 25, control arm; 26, round pin; 27, vertical plate. DETAILED DESCRIPTION

[0027] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0028] As shown in Figure 1 , Figure 3 and Figure 4 , the embodiment provides a water purifying device with a pure water soaking function, which uses tap water as raw material and provides pure water to users in communities, industrial sites or commercial sites after multi-stage filtration, and includes a filter 1 and a pure water tank 2. The filter 1 is internally provided with an RO membrane, and is provided with an inlet at the top and pure water outlets and concentrated water outlets at the bottom. A three-way valve 3 is installed at the inlet of the filter 1. One end of the three-way valve 3 is connected to a pure water pipe 4, and the other end is connected to a raw water pipe. The pure water pipe 4 is fixedly provided with a water suction pump 5 located in the pure water tank 2. The three-way valve 3 is controlled to input raw water or pure water into the filter 1. The pure water tank 2 is provided with a water inlet 201 and a water outlet 202, and the pure water outlet of the filter 1 is communicated with the water inlet 201. The pure water tank 2 is internally provided with a water outlet pipe 6 communicated with the water outlet 202. When a user takes water, the pure water stored in the pure water tank 2 is introduced into the water outlet pipe 6 through an external water pump, and is finally discharged through a water outlet faucet.

[0029] In normal working state, the three-way valve 3 is communicated with the raw water pipe, the pure water pipe 4 is not communicated with the three-way valve 3, the raw water continuously enters the filter 1, and the produced pure water continuously enters the pure water tank 2. When the RO membrane in the filter 1 is cleaned, the three-way valve 3 is first adjusted to make the pure water pipe 4 communicated with the three-way valve 3, and the raw water pipe is disconnected with the three-way valve 3, then the water pump 5 is used to suck water from the pure water tank 2, so that the pure water enters the filter 1, the original raw water in the filter 1 is discharged from the concentrated water outlet, until the pure water fills the filter 1, the water pump 5 is closed, and the RO membrane in the filter 1 is soaked in the pure water. After soaking for a certain period of time, the pollutants on the surface of the RO membrane are decomposed and dissolved in the pure water, finally the three-way valve 3 is adjusted to make the pure water pipe 4 disconnected with the three-way valve 3, and the three-way valve 3 is communicated with the raw water pipe again, so as to introduce the raw water into the filter 1, and the pure water mixed with pollutants is discharged from the concentrated water outlet.

[0030] As shown in Figure 1 , Figure 2 and Figure 3 , two vertical guide columns 7 are fixedly installed in the pure water pipe 4, a floating body 8 is slidingly installed between the two guide columns 7 in the vertical direction, the floating body 8 floats on the water surface of the pure water, a mounting plate 10 is arranged on the floating body 8 through a connecting line 9, and two conductive rods 11 are fixedly installed on the mounting plate 10. An electric source 12 for supplying power to the water pump 5 is fixedly installed outside the pure water tank 2, a first conductor 13 connected with the water pump 5 and a second conductor 14 connected with the electric source 12 are fixedly installed in the pure water tank 2. The conductive rods 11, the first conductor 13 and the second conductor 14 are all coated with an insulating layer, and the conductive parts of the three are made of hard material. The first conductor 13 is connected with the positive and negative electrodes of the water pump 5, and the second conductor 14 is connected with the positive and negative electrodes of the electric source 12. When the floating body 8 is located at the top of the stroke, the two ends of the conductive rods 11 are respectively in contact with the ends of the first conductor 13 and the second conductor 14, the water pump 5, the electric source 12, the conductive rods 11, the first conductor 13 and the second conductor 14 form a complete series circuit, the electric source 12 supplies power to the water pump 5, and the water pump 5 starts to work. An iron plate 15 is fixedly installed on the top of the pure water tank 2, and a magnet column 16 corresponding to the position of the iron plate 15 is fixedly installed on the upper surface of the mounting plate 10. A base 17 is fixedly installed on the top of the floating body 8, and a groove matched with the shape and size of the mounting plate 10 is formed on the upper surface of the base 17.

[0031] Specifically, during the day when the user uses water more frequently, the water inflow from the water inlet 201 and the water outflow from the water outlet 202 of the pure water tank 2 remain relatively balanced, the float 8 is always at a lower position in the pure water tank 2, the electrically conductive rod 11 is always not in contact with the first conductor 13 and the second conductor 14, and the water suction pump 5 is in a closed state. As the water usage amount decreases at night, the water inflow of the pure water tank 2 is greater than the water outflow, the water stored in the pure water tank 2 increases, and the water surface also rises. The float 8 drives the base 17, the connecting wire 9, the mounting plate 10, the electrically conductive rod 11, and the magnet column 16 to continuously rise until the electrically conductive rod 11 is in contact with the first conductor 13 and the second conductor 14, and the magnet column 16 is also in contact with the iron plate 15 and is adsorbed on the iron plate 15. The water suction pump 5 starts to work, and at the same time, the three-way valve 3 also completes the water path switching, so that the water suction pump 5 can input the pure water into the filter 1 through the pure water pipe 4. As the water suction pump 5 continuously introduces the pure water into the filter 1, the water stored in the pure water tank 2 gradually decreases, and the float 8 and the base 17 descend with the water surface. However, because the magnet column 16 is adsorbed with the iron plate 15, the mounting plate 10, the electrically conductive rod 11, and the magnet column 16 will not descend, but are connected with the float 8 only through the connecting wire 9. The originally relaxed connecting wire 9 is pulled tight until the float 8 descends to a predetermined height and is separated from the water surface. At this time, the pure water has filled the filter 1, and thereafter the float 8 is no longer affected by the buoyancy. The weight of the float 8 and the base 17 is completely applied to the mounting plate 10, the electrically conductive rod 11, and the magnet column 16 through the connecting wire 9, and the pulling force of the connecting wire 9 causes the magnet column 16 to separate from the iron plate 15. The mounting plate 10, the electrically conductive rod 11, and the magnet column 16 fall onto the base 17 under the action of gravity, and the mounting plate 10 falls into the groove of the base 17. The electrically conductive rod 11 separates from the first conductor 13 and the second conductor 14, the power supply 12 stops supplying power to the water suction pump 5, and the water suction pump 5 stops working. However, the three-way valve 3 remains in a state of communication with the pure water pipe 4, and the external raw water cannot enter the filter 1. The RO membrane in the filter 1 can be continuously soaked in the pure water, and the pollutants on the surface of the RO membrane are decomposed into the pure water after continuous soaking. As the water usage amount increases during the day, because there is no longer any raw water supply, the amount of pure water in the pure water pipe 4 continues to decrease, and the float 8 continues to descend. After the float 8 descends to a predetermined height, the three-way valve 3 switches the water path, and it is disconnected from the pure water pipe 4 and connected with the raw water pipe. The raw water can enter the filter 1 and discharge the water mixed with pollutants in the filter 1. The water supply amount and the water usage amount of the pure water tank 2 remain relatively balanced, and the height of the float 8 remains within a certain range until the above process is repeated after the water usage amount decreases at night. In this way, the embodiment realizes the normal working state during the day when the water usage amount is large, and automatically soaks the RO membrane in the filter 1 with pure water and automatically discharges the polluted water after soaking at night when the water usage amount is small.

[0032] It should be noted that when the water suction pump 5 stops working, since the three-way valve 3 is in communication with the pure water pipe 4 and is disconnected with the raw water pipe, no water will enter the filter 1, and the pure water in the filter 1 will not be discharged, and the RO membrane can be soaked in the pure water. When the three-way valve 3 returns to the state of communication with the raw water pipe, the raw water enters the filter 1, and the water in the filter 1 will be discharged.

[0033] As shown in Figure 4 and Figure 7 , the first rotating arm 18 is installed on the three-way valve 3 by a torsion spring, and the first rotating arm 18 is in a first state under no external force, in which state the three-way valve 3 is not in communication with the pure water pipe 4 and is in communication with the raw water pipe. When the first rotating arm 18 is subjected to an upward force, it rotates upward and enters a second state, in which state the three-way valve 3 is in communication with the pure water pipe 4 and is not in communication with the raw water pipe.

[0034] As shown in Figure 4 , Figure 5 , Figure 6 and Figure 7 , the top support rod 19 penetrating the top of the pure water tank 2 is fixedly installed on the float 8, and a sealing ring cooperating with the top support rod 19 is installed on the pure water tank 2 to prevent external dust and other pollutants from entering the pure water tank 2. The top support rod 19 is rotatably installed with a roller 20 corresponding to the position of the first rotating arm 18. The first rotating arm 18 is fixedly installed with a horizontal limiting pin 21, and a bracket is fixedly installed on the pure water pipe 4, and a second rotating arm 22 for limiting the limiting pin 21 is rotatably installed on the bracket. A lifting rod 23 located below the second rotating arm 22 is slidably installed on the bracket in the vertical direction, and a first horizontal portion is formed on the lifting rod 23 close to the top thereof, and a vertical extension spring 24 is arranged between the first horizontal portion and the bracket. A second horizontal portion is formed on the lifting rod 23 close to the bottom thereof, and a control arm 25 is slidably installed on the top support rod 19 in the horizontal direction, and a horizontal round pin 26 is installed at one end of the control arm 25. A vertical plate 27 is fixedly installed on the pure water pipe 4, and a guide groove cooperating with the round pin 26 is formed in the vertical plate 27.

[0035] Specifically, as shown in Figure 7 , during normal operation during the day, the top support rod 19, the roller 20, the control arm 25 and the round pin 26 are synchronously raised during the night, the roller 20 contacts the bottom of the first rotating arm 18 and pushes the first rotating arm 18 to rotate upward against the action of the torsion spring, until it reaches Figure 4The first rotating arm 18 and the limiting pin 21 rotate upward, the limiting pin 21 contacts the second rotating arm 22 and pushes the second rotating arm 22 to rotate upward, as the first rotating arm 18 and the limiting pin 21 continue to rotate upward, the limiting pin 21 separates from the second rotating arm 22, the second rotating arm 22 rotates downward under the action of gravity and returns to the horizontal state of abutting the top of the lifting rod 23. When the float 8 rises to the highest point of its stroke, the first rotating arm 18 also completes the state conversion and enters the second state, the water in the pure water tank 2 enters the filter 1 through the pure water pipe 4. As the float 8 descends, the supporting rod 19, the roller 20, the control arm 25 and the round pin 26 also descend synchronously, the first rotating arm 18 and the limiting pin 21 also reverse a small angle under the rebounding action of the torsional spring until the limiting pin 21 abuts the second rotating arm 22, because the second rotating arm 22 is supported by the lifting rod 23 and the lifting rod 23 is supported by the extension spring 24, so the second rotating arm 22 will block the first rotating arm 18 and the limiting pin 21 from reversing to the first state. As the float 8 continues to descend, the round pin 26 enters the state of abutting the guide groove on the vertical plate 27. As shown in Figure 5 The guide groove includes a first vertical section, an arc-shaped first guide section connected at the bottom of the first vertical section, a second vertical section connected at the bottom of the guide section, an inclined second guide section connected at the top of the second vertical section, and the top of the second guide section corresponds to the first vertical section. During the descent of the round pin 26, the round pin 26 first abuts the first vertical section of the guide groove and descends along the first vertical section, during this process, the control arm 25 abuts the second horizontal part of the lifting rod 23 and applies a downward force to the lifting rod 23, in this way, through the weight of the float 8 and the base 17, the lifting rod 23 is compressed to descend the extension spring 24, the lifting rod 23 descends to release the support of the second rotating arm 22, the second rotating arm 22 is able to rotate downward under the action of gravity, thereby releasing the limiting of the limiting pin 21, the first rotating arm 18 and the limiting pin 21 are able to return to the initial state under the rebounding action of the torsional spring, that is, the three-way valve 3 returns to the state of communicating with the raw water pipe. As the float 8 continues to descend, the control arm 25 and the round pin 26 also continue to descend, the round pin 26 enters the bottom of the second vertical section under the action of the first guide section, the control arm 25 is able to move horizontally and separate from the second horizontal part of the lifting rod 23, the lifting rod 23 is able to rise to the initial height under the rebounding force of the extension spring 24, and the second rotating arm 22 also returns to the horizontal state under the support of the lifting rod 23. Thereafter, due to the limiting block of the vertical plate 27, the float 8 cannot continue to descend and remains at a constant height. When the float 8 rises, the round pin 26 enters the second guide section along the second vertical section, and the round pin 26 finally separates from the vertical plate 27, which corresponds to the first vertical section in position, to ensure that it can smoothly enter the first vertical section during subsequent descent, that is, the control arm 25 can smoothly abut the second horizontal part of the lifting rod 23 subsequently.

[0036] In summary, when the water consumption is low at night, the water suction pump 5 can be automatically opened, and the state of the three-way valve 3 is switched, so that the three-way valve 3 is communicated with the pure water pipe 4, and the pure water enters the filter 1 to soak the RO membrane. When the water consumption increases during the day, the three-way valve 3 can be automatically switched back to the state of being communicated with the raw water pipe, and the water mixed with pollutants in the filter 1 is discharged.

[0037] The foregoing merely illustrates some exemplary embodiments of the present application, and it is needless to say that the described embodiments can be modified in various ways by those skilled in the art without departing from the spirit and scope of the present application. Therefore, the foregoing drawings and descriptions are illustrative in nature, and should not be construed as limiting the scope of the claims of the present application.

Claims

1. A water purification device with a pure water immersion function, comprising a filter (1) and a pure water tank (2), characterized in that, A three-way valve (3) is installed at the inlet of the filter (1); one end of the three-way valve (3) is connected to a pure water pipe (4), and a water pump (5) located in the pure water tank (2) is fixedly installed on the pure water pipe (4); the pure water tank (2) is provided with an inlet (201) and an outlet (202), and the pure water outlet of the filter (1) is connected to the inlet (201); an outlet pipe (6) connected to the outlet (202) is installed in the pure water tank (2).

2. A water purification device with pure water immersion function according to claim 1, characterized in that, Two vertical guide columns (7) are fixedly installed inside the pure water pipe (4). A float (8) is slidably installed between the two guide columns (7) in the vertical direction. An installation plate (10) is set on the float (8) through a connecting line (9). Two conductive rods (11) are fixedly installed on the installation plate (10).

3. A water purification device with pure water immersion function according to claim 2, characterized in that, The pure water tank (2) is fixedly equipped with a power supply (12) for supplying power to the water pump (5). The pure water tank (2) is fixedly equipped with a first conductor (13) connected to the water pump (5) and a second conductor (14) connected to the power supply (12). When the float (8) is at the top of its stroke, the two ends of the conductive rod (11) are in contact with the first conductor (13) and the second conductor (14) respectively.

4. A water purification device with pure water immersion function according to claim 3, characterized in that, An iron plate (15) is fixedly installed on the top of the pure water tank (2), and a magnet column (16) corresponding to the position of the iron plate (15) is fixedly installed on the upper surface of the mounting plate (10).

5. A water purification device with pure water soaking function according to claim 4, characterized in that, The top of the float (8) is fixedly installed with a base (17), and the upper surface of the base (17) has a groove that matches the shape and size of the mounting plate (10).

6. A water purification device with pure water immersion function according to claim 5, characterized in that, The three-way valve (3) is equipped with a first rotating arm (18) by a torsion spring. The first rotating arm (18) is in the first state when there is no external force. In this state, the three-way valve (3) and the pure water pipe (4) are not connected. When the first rotating arm (18) is subjected to an upward force, it rotates upward and enters the second state. In this state, the three-way valve (3) and the pure water pipe (4) are connected.

7. A water purification device with pure water immersion function according to claim 6, characterized in that, The float (8) is fixedly installed with a top support rod (19) that penetrates the top of the pure water tank (2), and a roller (20) corresponding to the position of the first rotating arm (18) is rotatably installed on the top support rod (19).

8. A water purification device with pure water immersion function according to claim 7, characterized in that, A horizontal limiting pin (21) is fixedly installed on the side of the first rotating arm (18), and a bracket is fixedly installed on the pure water pipe (4). A second rotating arm (22) for limiting the limiting pin (21) is rotatably installed on the bracket.

9. A water purification device with pure water immersion function according to claim 8, characterized in that, A lifting rod (23) located below the second rotating arm (22) is slidably installed on the support along the vertical direction. A first horizontal part is formed on the lifting rod (23) near its top. A vertical telescopic spring (24) is provided between the first horizontal part and the support.

10. A water purification device with a pure water immersion function according to claim 9, characterized in that, The lifting rod (23) forms a second horizontal part near its bottom. A control arm (25) is slidably installed on the top support rod (19) in the horizontal direction. A horizontal round pin (26) is installed at one end of the control arm (25). A vertical plate (27) is fixedly installed on the pure water pipe (4). A guide groove that cooperates with the round pin (26) is opened on the vertical plate (27).

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