Water purifier

Abstract

The utility model relates to water purification equipment technical field, specifically provide a water purifier. Specifically, the water purifier of the utility model includes four valves, reverse osmosis filter element, first pressure bucket, first check valve and water outlet, four valves have first passway and second passway, and the water inlet end and water outlet end of first passway are communicated with water source and the water inlet of reverse osmosis filter element through water inlet pipeline and first pipeline respectively, and the pure water outlet of reverse osmosis filter element is communicated with the water inlet end of second passway through second pipeline, and the water outlet end of second passway is communicated with water outlet through water outlet pipeline, and the first water storage cavity of first pressure bucket is communicated with first pipeline and is communicated with second pipeline, and first check valve is arranged on the pipeline communicated with first pipeline. After the water outlet is closed, the pure water stored in the first water storage cavity will flow to the front of RO membrane, and the pure water bubble membrane is carried out, to reduce the TDS value of water in the front of RO membrane, so that when the user reopens the water outlet to take water, the TDS value of the first cup of water will not exceed the standard.

Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and specifically provides a water purifier. Background Technology

[0002] As people's living standards improve and industrialization accelerates, water pollution is becoming increasingly harmful to human health. As a result, water purification equipment is becoming more and more popular.

[0003] Most existing water purifiers are equipped with reverse osmosis (RO) filters, which are mainly composed of a reverse osmosis membrane (RO membrane). When a water purifier is shut down for a period of time, the concentrated water side and the purified water side of the RO membrane will interpenetrate. Based on the principle that ions diffuse from high-concentration solutions to low-concentration solutions, ions in the concentrated water before the membrane will diffuse into the purified water after the membrane, thus contaminating the purified water. When the user takes water the next time, the contaminated purified water will flow out along with the freshly purified water, resulting in a very high TDS (Total Dissolved Solids) level for the first glass of water, making it unsuitable for drinking.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem of high TDS in the first cup of water after the existing water purifier is turned off.

[0006] In a first aspect, the present invention provides a water purifier, comprising a four-way valve, a reverse osmosis filter element, a first pressure tank, a water outlet, and a first one-way valve. The four-way valve has a first passage and a second passage. The inlet end of the first passage is connected to a water supply source via an inlet pipe, and the outlet end of the first passage is connected to the inlet of the reverse osmosis filter element via a first pipe. The pure water outlet of the reverse osmosis filter element is connected to the inlet end of the second passage via a second pipe, and the outlet end of the second passage is connected to the water outlet via an outlet pipe. The four-way valve is configured to cut off the first passage when the pressure of the second passage rises to a first threshold, and to open the first passage when the pressure of the second passage drops to a second threshold, wherein the first threshold is greater than the second threshold. The first pressure tank has a first water storage chamber, which is connected to both the first pipe and the second pipe. The first one-way valve is disposed on the pipe connected to the first pipe to prevent water in the first pipe from directly entering the first water storage chamber.

[0007] In the preferred embodiment of the above-mentioned water purifier, the first water storage chamber is connected to the second pipeline through a first branch pipe, the second pipeline is connected to the first pipeline through a third pipeline, the first one-way valve is installed on the third pipeline, the inlet of the first one-way valve faces the second pipeline, and the outlet of the first one-way valve faces the first pipeline.

[0008] In the preferred technical solution of the above water purifier, the first branch pipe, the second pipe and the third pipe are connected by a four-way valve.

[0009] In the preferred embodiment of the water purifier described above, the water purifier further includes a second pressure tank, which has a second water storage chamber, and the second water storage chamber is connected to the second pipeline through a second branch pipeline.

[0010] In the preferred embodiment of the water purifier described above, the connection point between the second pipeline and the first water storage chamber is located upstream of the connection point between the second pipeline and the second water storage chamber. The water purifier also includes a second one-way valve, which is disposed on the second pipeline between the first pressure tank and the second pressure tank. The inlet of the second one-way valve faces the reverse osmosis filter element, and the outlet of the second one-way valve faces the second pressure tank.

[0011] In the preferred embodiment of the water purifier described above, the water purifier further includes a post-filter element, which is installed on the second pipeline or the outlet pipeline.

[0012] In the preferred embodiment of the water purifier described above, when the post-filter is installed in the second pipeline, the post-filter is located downstream of the connection point between the second pipeline and the second water storage chamber.

[0013] In the preferred embodiment of the water purifier described above, the water purifier further includes a pre-filter element, which is installed on the water inlet pipe or the first pipe.

[0014] In the preferred embodiment of the water purifier described above, when the pre-filter is installed on the first pipeline, the pre-filter is located upstream of the connection point between the first pipeline and the first water storage chamber.

[0015] In the preferred embodiment of the above-mentioned water purifier, the water purifier is an electricity-free water purifier.

[0016] In the case of the above technical solution, the water purifier of this utility model adopts a combination of a four-way valve and a pressure tank. The pressure tank is connected to the first pipeline before the reverse osmosis filter and the second pipeline after the reverse osmosis filter. A first one-way valve is installed on the pipeline connected to the first pipeline. When the water outlet of the water purifier changes from the open state to the closed state, the pressure value of the second passage of the four-way valve is low, below the first threshold. The first passage of the four-way valve remains open, and the reverse osmosis filter continues to produce pure water. The first water storage chamber of the first pressure tank is connected to the second pipeline, and the produced pure water enters the first water storage chamber of the first pressure tank. As the amount of pure water in the first water storage chamber increases, the pressure in the first pressure chamber of the first pressure tank increases. As the pressure increases, the pressure in the second passage of the four-way valve also rises. When the pressure in the second passage of the four-way valve rises to the first threshold, the first passage of the four-way valve is disconnected, and the water inlet is cut off. After the water inlet is cut off, the water before the RO membrane continues to be discharged to the RO membrane and the wastewater pipe under the action of residual pressure, and the pressure drops accordingly. When the pressure before the RO membrane drops to a level lower than the pressure in the first pressure chamber of the first pressure tank, since the first water storage chamber of the first pressure tank is still connected to the first pipeline, the pure water stored in the first water storage chamber will flow to the first pipeline, that is, to the RO membrane, to perform pure water membrane soaking, thereby reducing the TDS value of the water before the RO membrane. In this way, when the user reopens the water outlet to collect water, the TDS value of the first cup of water will not exceed the standard.

[0017] Furthermore, the water purifier of this invention is equipped with a second pressure tank, and the second water storage chamber of the second pressure tank is also connected to the second pipeline. After the user closes the water outlet of the water purifier, part of the purified water enters the first water storage chamber of the first pressure tank, and part of the purified water enters the second water storage chamber of the second pressure tank. The first water storage chamber is connected to the first pipeline, and the purified water in the first water storage chamber is used for pure water membrane soaking to reduce the TDS value before the membrane. The second water storage chamber is not connected to the first pipeline. When the user reopens the water outlet to get water, the purified water in the second water storage chamber flows out under the pressure of the second pressure chamber, realizing the rapid output of pure water in a short time.

[0018] Furthermore, the water purifier of this invention has a second one-way valve installed on the second pipeline between the first pressure tank and the second pressure tank. When the outlet is closed, it can effectively prevent the pure water in the second water storage chamber of the second pressure tank from flowing towards the RO membrane. In this way, when the user reopens the outlet to get water, it can ensure that the pure water stored in the second water storage chamber flows out quickly from the outlet, thus achieving faster water output. Attached Figure Description

[0019] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0020] Figure 1 This is a system schematic diagram of the water purifier of this utility model. Figure 1;

[0021] Figure 2 This is a system schematic diagram of the water purifier of this utility model. Figure 2 .

[0022] List of reference numerals in the attached diagram:

[0023] 1. Four-way valve; 11. First passage; 12. Second passage; 2. Reverse osmosis filter element; 3. First pressure tank; 31. First water storage chamber; 32. First pressure chamber; 4. Outlet; 51. First pipeline; 52. Second pipeline; 53. Inlet pipeline; 54. Outlet pipeline; 55. First branch pipeline; 56. Third pipeline; 57. Second branch pipeline; 61. First check valve; 62. Second check valve; 63. Four-way valve; 64. First three-way valve; 65. Second three-way valve; 66. Wastewater valve; 7. Second pressure tank; 71. Second water storage chamber; 72. Second pressure chamber; 8. Post-filter element; 9. Pre-filter element. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0025] It should be noted that in the description of this utility model, terms such as "left," "right," "up," and "down," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, it should be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In light of the problem pointed out in the background art that the TDS value of the first cup of water after the existing water purifier is turned off is too high, this utility model provides a water purifier that aims to reduce the TDS value of the first cup of water after the water purifier is turned off.

[0028] Specifically, such as Figure 1 and Figure 2 As shown, the water purifier of this utility model includes a four-way valve 1, a reverse osmosis filter element 2, a first pressure tank 3, a first one-way valve 61, and a water outlet 4.

[0029] The four-way valve 1 of this invention has a first passage 11 and a second passage 12. The four-way valve 1 is configured to cut off the first passage 11 when the pressure in the second passage 12 rises to a first threshold, and to open the first passage 11 when the pressure in the second passage 12 drops to a second threshold, wherein the first threshold is greater than the second threshold. In other words, the on / off state of the first passage 11 of the four-way valve 1 is determined by the pressure in the second passage 12. The four-way valve 1 is a common inlet control valve in the prior art, and its specific structure will not be described in detail here.

[0030] like Figure 1 and Figure 2 As shown, the inlet end of the first passage 11 of the four-way valve 1 is connected to the water supply source through the inlet pipe 53, the outlet end of the first passage 11 of the four-way valve 1 is connected to the inlet of the reverse osmosis filter element 2 through the first pipe 51, the pure water outlet of the reverse osmosis filter element 2 is connected to the inlet end of the second passage 12 of the four-way valve 1 through the second pipe 52, and the outlet end of the second passage 12 of the four-way valve 1 is connected to the outlet 4 of the water purifier through the outlet pipe 54.

[0031] For example, the first passage 11 of the four-way valve 1 is located below the second passage 12. The left end of the first passage 11 is its water inlet, and the right end of the first passage 11 is its water outlet. The water inlet of the first passage 11 is connected to the water supply source through the water inlet pipe 53. For example, the water inlet of the first passage 11 can be connected to the faucet in the user's home through the water inlet pipe 53. The water outlet of the first passage 11 is connected to the water inlet of the reverse osmosis filter element 2 through the first pipe 51. The pure water formed after filtration by the reverse osmosis filter element 2 is discharged through the pure water outlet of the reverse osmosis filter element 2, and the concentrated water is discharged through the water outlet of the reverse osmosis filter element 2. The wastewater is discharged through the wastewater outlet of the reverse osmosis filter element 2, which is located at the bottom of the reverse osmosis filter element 2. The wastewater outlet is connected to a wastewater pipeline, which is generally equipped with a wastewater valve 66. The pure water outlet of the reverse osmosis filter element 2 is connected to the inlet end of the second passage 12 of the four-way valve 1 through the second pipeline 52. The left end of the second passage 12 is its inlet end, and the right end of the second passage 12 is its outlet end. The outlet end of the second passage 12 is connected to the outlet 4 through the outlet pipeline 54. The outlet 4 is a water tap. After the user turns on the water tap, the pure water produced by the water purifier flows out from the water tap.

[0032] like Figure 1 and Figure 2 As shown, the first pressure tank 3 has a first water storage chamber 31 and a first pressure chamber 32. The first water storage chamber 31 of the first pressure tank 3 is connected to the first pipeline 51 and the second pipeline 52. The first one-way valve 61 is installed on the pipeline connected to the first pipeline 51 to prevent water in the first pipeline 51 from directly entering the first water storage chamber 31.

[0033] The water purifier of this utility model adopts a combination of a four-sided valve 1 and a first pressure tank 3, which can prevent the TDS value of the first cup of water after the water purifier is stopped from being too high.

[0034] Specifically, when the water purifier's outlet 4 changes from the open state to the closed state, the pressure value of the second passage 12 of the four-way valve 1 is low, below the first threshold. The first passage 11 of the four-way valve 1 remains connected, and the reverse osmosis filter 2 continues to produce pure water. The first water storage chamber 31 of the first pressure tank 3 is connected to the second pipeline 52, and the produced pure water enters the first water storage chamber 31 of the first pressure tank 3. As the amount of pure water in the first water storage chamber 31 increases, the pressure in the first pressure chamber 32 increases, and the pressure of the second passage 12 of the four-way valve 1 also rises. When the pressure of the second passage 12 of the four-way valve 1 rises to the first threshold, the first passage 11 of the four-way valve 1 is disconnected, and the water inlet is cut off.

[0035] After the inlet water is cut off, under the residual pressure, the water before the RO membrane continues to flow to the outlet water and wastewater pipe, causing the pressure to drop. When the pressure before the RO membrane drops below the pressure in the first pressure chamber 32 of the first pressure tank 3, since the first water storage chamber 31 of the first pressure tank 3 is still connected to the first pipeline 51, such as... Figure 2 As shown, the pure water stored in the first water storage chamber 31 will flow to the first pipeline 51, that is, to the front of the RO membrane, to perform pure water soaking, thereby reducing the TDS value of the water before the RO membrane. In this way, when the user reopens the water outlet 4 to get water, the TDS value of the first cup of water will not exceed the standard.

[0036] It should be noted that the technical solution of this utility model can be applied to both electric water purifiers and non-electric water purifiers. Electric water purifiers refer to water purifiers that need to be connected to a power source, while non-electric water purifiers refer to water purifiers that do not need to be connected to a power source. Of course, the water purifier of this utility model is preferably set as a non-electric water purifier.

[0037] Furthermore, it should be noted that, in practical applications, those skilled in the art can provide two openings on the first pressure tank 3 that communicate with the first water storage chamber 31. One of the two openings is connected to the first pipeline 51 via a pipe, and the other opening is connected to the second pipeline 52 via another pipe. Alternatively, only one opening may be provided on the first pressure tank 3 that communicates with the first water storage chamber 31. This opening is connected to the second pipeline 52 via a pipe, and a pipe is provided between the first pipeline 51 and the second pipeline 52 to connect the first pipeline 51 and the second pipeline 52, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this utility model and should all be limited to the protection scope of this utility model.

[0038] Furthermore, it should be noted that this utility model does not limit the specific structural form of the first pressure tank 3. It can adopt the pressure tank commonly used in the prior art. For example, the first pressure tank 3 is provided with a flexible diaphragm, which divides the first pressure tank 3 into upper and lower chambers. The upper chamber is the first water storage chamber 31, and the lower chamber is the first pressure chamber 32. The first pressure chamber 32 stores gas at a certain pressure. The total volume of the first water storage chamber 31 and the first pressure chamber 32 is fixed. As the amount of pure water in the first water storage chamber 31 increases, the volume of the first water storage chamber 31 gradually increases. Correspondingly, the volume of the first pressure chamber 32 gradually decreases, and the pressure in the first pressure chamber 32 gradually increases.

[0039] Preferably, such as Figure 1 and Figure 2 As shown, the first water storage chamber 31 of the first pressure tank 3 of this utility model is connected to the second pipeline 52 through the first branch pipeline 55, and the second pipeline 52 is connected to the first pipeline 51 through the third pipeline 56. The first check valve 61 is installed on the third pipeline 56, with the inlet of the first check valve 61 facing the second pipeline 52 and the outlet of the first check valve 61 facing the first pipeline 51.

[0040] In other words, an opening can be set on the first pressure tank 3 to connect with the first water storage chamber 31. First, the first water storage chamber 31 is connected to the second pipe 52 through the first branch pipe 55, and then the second pipe 52 is connected to the first pipe 51 through the third pipe 56. The first one-way valve 61 is set on the third pipe 56. When the user opens the water outlet 4 of the water purifier to get water, the water in the first pipe 51 will not pass through the reverse osmosis filter 2 and directly enter the second pipe 52 due to the obstruction of the first one-way valve 61. When the user closes the water outlet 4, water production continues for a period of time until the first passage 11 of the four-way valve 1 is cut off. When the pressure before the RO membrane drops to a level lower than the pressure in the first pressure chamber 32 of the first pressure tank 3, the pure water stored in the first water storage chamber 31 will flow along the first branch pipe 55 and the third pipe 56 to the first pipe 51, that is, to the RO membrane, to perform pure water membrane soaking, thereby reducing the TDS value of the water before the RO membrane.

[0041] It should be noted that, in practical applications, those skilled in the art can connect the first branch pipe 55 to the second pipe 52 using a three-way valve, and then connect one end of the third pipe 56 to the second pipe 52 using another three-way valve. Alternatively, a four-way valve can be used to connect the first branch pipe 55, the second pipe 52, and the third pipe 56, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this utility model and should all be limited to the protection scope of this utility model.

[0042] Preferably, such as Figure 1 and Figure 2As shown, the first branch pipe 55, the second pipe 52 and the third pipe 56 are connected by a four-way valve 63.

[0043] For example, the left and right ports of the four-way valve 63 are both connected to the second pipeline 52, the bottom port of the four-way valve 63 is connected to one end of the first branch pipeline 55, the other end of the first branch pipeline 55 is connected to the first water storage chamber 31 of the first pressure tank 3, the top port of the four-way valve 63 is connected to one end of the third pipeline 56, and the other end of the third pipeline 56 is connected to the first pipeline 51 through the first three-way valve 64.

[0044] Preferably, such as Figure 1 and Figure 2 As shown, the water purifier of this utility model also includes a second pressure tank 7, which has a second water storage chamber 71 and a second pressure chamber 72. The second water storage chamber 71 is connected to the second pipe 52 through a second branch pipe 57.

[0045] The water purifier of this utility model is equipped with a second pressure tank 7, and the second water storage chamber 71 of the second pressure tank 7 is also connected to the second pipeline 52. After the user closes the water outlet 4 of the water purifier, part of the purified water enters the first water storage chamber 31 of the first pressure tank 3, and part of the purified water enters the second water storage chamber 71 of the second pressure tank 7. The first water storage chamber 31 is connected to the first pipeline 51. The purified water in the first water storage chamber 31 is used for pure water membrane soaking to reduce the TDS value before the membrane. The second water storage chamber 71 is not connected to the first pipeline 51. When the user reopens the water outlet 4 to get water, the purified water in the second water storage chamber 71 flows out under the pressure of the second pressure chamber 72, realizing the rapid output of purified water in a short time. The water in the system flows out through the water outlet 4, and the pressure value of the second passage 12 of the four-sided valve 1 begins to drop. When it drops to the second threshold, the first passage 11 of the four-sided valve 1 is connected, and the system restarts water production.

[0046] It should be noted that this utility model does not limit the specific structure of the second pressure tank 7. Preferably, the structure of the second pressure tank 7 is the same as that of the first pressure tank 3, that is, the same type of pressure tank is used.

[0047] Preferably, such as Figure 1 and Figure 2 As shown, the connection point between the second pipeline 52 and the first water storage chamber 31 of the first pressure tank 3 of the water purifier of this utility model is located upstream of the connection point between the second pipeline 52 and the second water storage chamber 71 of the second pressure tank 7. The water purifier of this utility model also includes a second one-way valve 62, which is disposed on the second pipeline 52 between the first pressure tank 3 and the second pressure tank 7. The inlet of the second one-way valve 62 faces the reverse osmosis filter element 2, and the outlet of the second one-way valve 62 faces the second pressure tank 7.

[0048] By installing a second one-way valve 62 on the second pipeline 52 between the first pressure tank 3 and the second pressure tank 7, when the outlet 4 is closed, the pure water in the second water storage chamber 71 of the second pressure tank 7 can be effectively prevented from flowing towards the RO membrane. In this way, when the user reopens the outlet 4 to receive water, the pure water stored in the second water storage chamber 71 can be ensured to flow out quickly from the outlet 4, thus achieving faster water output.

[0049] For example, the water in the second pipe 52 flows from left to right, the first pressure tank 3 is located to the left of the second pressure tank 7, that is, the first pressure tank 3 is located upstream of the second pressure tank 7, the first branch pipe 55 is connected to the second pipe 52 through the four-way valve 63, and the second branch pipe 57 is connected to the second pipe 52 through the second three-way valve 65.

[0050] Preferably, such as Figure 1 and Figure 2 As shown, the water purifier of this utility model also includes a post-filter element 8, which is installed in the second pipeline 52.

[0051] It should be noted that, in practical applications, those skilled in the art can also install the post-filter 8 on the water outlet pipe 54, that is, between the second passage 12 of the four-way valve 1 and the water outlet 4 of the water purifier.

[0052] Preferably, such as Figure 1 and Figure 2 As shown, the post-filter 8 of the water purifier of this utility model is located downstream of the connection point between the second pipeline 52 and the second water storage chamber 71 of the second pressure tank 7.

[0053] In other words, the water flowing out of the second water storage chamber 71 of the second pressure tank 7 first passes through the post-filter 8 and then is discharged from the water outlet 4 of the water purifier.

[0054] Preferably, such as Figure 1 and Figure 2 As shown, the water purifier of this utility model also includes a pre-filter element 9, which is installed in the water inlet pipe 53.

[0055] After the raw water enters the inlet pipe 53, it is first filtered by the pre-filter 9, and the filtered water enters the first passage 11 of the four-way valve 1.

[0056] It should be noted that, in practical applications, those skilled in the art can also install the pre-filter 9 on the first pipeline 51, that is, install the pre-filter 9 between the first passage 11 of the four-way valve 1 and the reverse osmosis filter 2.

[0057] Furthermore, it should be noted that when the pre-filter 9 is installed on the first pipeline 51, it is preferable to install the pre-filter 9 upstream of the connection point between the first pipeline 51 and the first water storage chamber 31 of the first pressure tank 3.

[0058] For example, the first pipeline 51 is connected to one end of the third pipeline 56 through the first three-way valve 64, and the other end of the third pipeline 56 is connected to one end of the first branch pipeline 55 through the four-way valve 63. The other end of the first branch pipeline 55 is connected to the first water storage chamber 31 of the first pressure tank 3. The pre-filter 9 can be installed on the first pipeline 51 between the first passage 11 of the four-way valve 1 and the first three-way valve 64.

[0059] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0060] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A water purifier characterized by comprising: The water purifier includes a four-way valve (1), a reverse osmosis filter element (2), a first pressure tank (3), a water outlet (4), and a first one-way valve (61). The four-way valve (1) has a first passage (11) and a second passage (12). The inlet end of the first passage (11) is connected to the water supply source through an inlet pipe (53). The outlet end of the first passage (11) is connected to the inlet of the reverse osmosis filter element (2) through a first pipe (51). The pure water outlet of the reverse osmosis filter element (2) is connected to the inlet end of the second passage (12) through a second pipe (52). The outlet end of the second passage (12) is connected to the outlet (4) through an outlet pipe (54). The four-way valve (1) is configured to cut off the first passage (11) when the pressure of the second passage (12) rises to a first threshold, and to open the first passage (11) when the pressure of the second passage (12) drops to a second threshold, wherein the first threshold is greater than the second threshold; The first pressure tank (3) has a first water storage chamber (31), which is connected to the first pipeline (51) and the second pipeline (52). The first one-way valve (61) is installed on the pipeline connected to the first pipeline (51) to prevent water in the first pipeline (51) from directly entering the first water storage chamber (31).

2. The water purifier according to claim 1, characterized in that, The first water storage chamber (31) is connected to the second pipeline (52) through the first branch pipeline (55), and the second pipeline (52) is connected to the first pipeline (51) through the third pipeline (56). The first check valve (61) is installed on the third pipeline (56), with the inlet of the first check valve (61) facing the second pipeline (52) and the outlet of the first check valve (61) facing the first pipeline (51).

3. The water purifier according to claim 2, characterized in that, The first branch pipe (55), the second pipe (52) and the third pipe (56) are connected by a four-way valve (63).

4. The water purifier according to claim 1, wherein The water purifier also includes a second pressure tank (7), which has a second water storage chamber (71) and is connected to the second pipeline (52) through a second branch pipeline (57).

5. The water purifier according to claim 4, wherein The connection point between the second pipeline (52) and the first water storage chamber (31) is located upstream of the connection point between the second pipeline (52) and the second water storage chamber (71). The water purifier also includes a second one-way valve (62). The second one-way valve (62) is installed on the second pipeline (52) between the first pressure tank (3) and the second pressure tank (7). The inlet of the second one-way valve (62) faces the reverse osmosis filter element (2), and the outlet of the second one-way valve (62) faces the second pressure tank (7).

6. The water purifier according to claim 4, wherein The water purifier also includes a post-filter (8), which is installed on the second pipeline (52) or the outlet pipeline (54).

7. The water purifier according to claim 6, wherein When the post-filter (8) is installed in the second pipeline (52), the post-filter (8) is located downstream of the connection point between the second pipeline (52) and the second water storage chamber (71).

8. The water purifier according to claim 1, wherein The water purifier also includes a pre-filter (9), which is installed on the inlet pipe (53) or the first pipe (51).

9. The water purifier according to claim 8, characterized in that, When the pre-filter (9) is installed on the first pipeline (51), the pre-filter (9) is located upstream of the connection point between the first pipeline (51) and the first water storage chamber (31).

10. The water purifier according to any one of claims 1 to 9, characterized in that, The water purifier is an electricity-free water purifier.

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