Multi-stage filtering water purifier

Abstract

The invention relates to the technical field of water purifiers, and provides a multi-stage filtration water purifier which comprises a water purifier shell, and a water inlet and a water outlet are formed in the water purifier shell; a multi-stage filtering mechanism positioned in the water purifier shell is communicated between the water inlet and the water outlet; the water outlet is also connected in series with at least two groups of gas-liquid double-cavity buffer mechanisms positioned in the water purifier shell; any gas-liquid double-cavity buffer mechanism comprises a protective shell as well as a gas cavity and a liquid cavity which are arranged in the protective shell, and the gas cavity and the liquid cavity are separated through an elastic pressure-resistant diaphragm; the liquid cavity is communicated with the water outlet, and the air cavity is located on the side, away from the water outlet, of the liquid cavity. Based on the elastic potential energy buffering principle of the elastic pressure-resistant diaphragm, buffering cooperation is generated between the air cavity and the liquid cavity through deformation of the elastic pressure-resistant diaphragm, the response speed of water hammer impact is high, the effect is good, complex mechanical moving parts do not need to be adopted, maintenance is convenient, and the use cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of water purifiers, and more specifically, to a multi-stage filtering water purifier. Background Art

[0002] Water purifiers are widely used to improve the quality of household drinking water, remove heavy metals and chemical pollution, meet differentiated water quality needs and ensure drinking water safety. The use of water purifiers needs to be coordinated with the water supply pipeline system. When in use, the problem of water pipe bursting caused by the water hammer effect always exists. In the face of this problem, some water purifiers designed and developed in the prior art mostly use complex mechanical moving parts to solve the water hammer effect, thereby avoiding the risk of pipeline damage caused by excessive water hammer impact. For example, the patent document with the publication number CN214400146U, named a multi-stage filtering household water purifier, the core principle of its solution is that the spring cooperates with the sliding sealing plate to achieve mechanical buffering, mainly the spring, lifting cylinder, sealing plate and other components are closely coordinated, which can play a certain buffering effect, but because its response speed must depend on the reset speed of the spring, the hysteresis is obvious. Moreover, during use, this mechanical moving part that cooperates with the spring is easily affected by the water quality and there is a risk of jamming, so the actual buffering effect is poor, and it is not convenient for timely maintenance, and the cost of use is high.

[0003] Application Contents

[0004] The technical problem to be solved by the present application is to provide a multi-stage filtering water purifier in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present application to solve its technical problems is: a multi-stage filtering water purifier, comprising a water purifier shell, on which a water inlet and a water outlet are provided; a multi-stage filtering mechanism located in the water purifier shell is connected between the water inlet and the water outlet; the water outlet is also connected in series with at least two groups of gas-liquid dual-cavity buffer mechanisms located in the water purifier shell; any of the gas-liquid dual-cavity buffer mechanisms comprises a protective shell and an air cavity and a liquid cavity arranged in the protective shell, and the air cavity and the liquid cavity are separated by an elastic pressure-resistant diaphragm; the liquid cavity is connected to the water outlet, and the air cavity is located on the side of the liquid cavity away from the water outlet.

[0006] In some embodiments, a delivery pipe is also provided in the water purifier shell, and the delivery pipe includes a main pipeline and at least two branch pipelines; the main pipeline is connected to the water outlet and the multi-stage filtering mechanism respectively through a three-way pipe, and at least two branch pipelines are connected to at least two liquid chambers one by one.

[0007] In some embodiments, the gas cavity includes a first cavity and high-pressure nitrogen gas filled in the first cavity.

[0008] In some embodiments, the pressure in the air cavity is 1.5-3 bar.

[0009] In some embodiments, the liquid chamber includes a second cavity and a liquid medium filled in the second cavity.

[0010] In some embodiments, a first pressure sensor is provided in the middle of a surface of one side of the elastic pressure-resistant diaphragm located in the air cavity.

[0011] In some embodiments, a second pressure sensor is provided in the middle of a surface on a side of the air cavity opposite to the first pressure sensor.

[0012] In some embodiments, the multi-stage filtering mechanism includes a first filter box and a second filter box, the water inlet end of the first filter box is connected to the water inlet, the water outlet end of the first filter box is connected to the water inlet end of the second filter box, and the water outlet end of the second filter box is connected to the three-way pipe.

[0013] In some embodiments, a three-stage filter assembly is provided in the first filter box, and the three-stage filter assembly includes a PP cotton filter element, a pre-activated carbon filter element and a reverse osmosis filter element which are connected in sequence; the PP cotton filter element is also connected to the water inlet; the reverse osmosis filter element is also connected to the water inlet end of the second filter box.

[0014] In some embodiments, a secondary filter assembly is provided in the second filter box, and the secondary filter assembly includes a post-activated carbon filter element and a mineralized filter element connected in sequence; the post-activated carbon filter element is also connected to a reverse osmosis filter element; the mineralized filter element is also connected to one of the pipe openings of the three-way pipe.

[0015] The beneficial effects of the present application are as follows: different from the prior art, in the multi-stage filtering water purifier of the present application, the water outlet of the water purifier shell is connected in series with at least two groups of gas-liquid dual-cavity buffer mechanisms located in the water purifier shell; any gas-liquid dual-cavity buffer mechanism includes a protective shell and an air cavity and a liquid cavity arranged in the protective shell, and the air cavity and the liquid cavity are separated by an elastic pressure-resistant diaphragm; based on the elastic potential energy buffering principle of the elastic pressure-resistant diaphragm, a buffering cooperation is generated between the air cavity and the liquid cavity through the deformation of the elastic pressure-resistant diaphragm, so that the response speed against water hammer impact is fast, there is no need to use complex mechanical moving parts, maintenance is convenient, and the use cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a multi-stage filtering water purifier in an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of a gas-liquid dual-chamber buffer mechanism in an embodiment of the present application;

[0018] Names and serial numbers in the figure: water purifier shell-1; water inlet-101; water outlet-102; protective shell-2; air cavity-201; liquid cavity-202; elastic pressure-resistant diaphragm-3; delivery pipe-11; main pipeline-110; branch pipeline-111; three-way pipe-8; first pressure sensor-4; second pressure sensor-5; first filter box-6; second filter box-7; PP cotton filter element-61; pre-activated carbon filter element-62; reverse osmosis filter element-63; post-activated carbon filter element-71; mineralized filter element-72. DETAILED DESCRIPTION

[0019] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0022] Moreover, the terms "up, down, front, back, left, right, upper end, lower end" etc. indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0024] The present application embodiment provides a multi-stage filtering water purifier, such as Figure 1 , 2 As shown in the figure, the multi-stage filtering water purifier includes a water purifier shell 1, on which a water inlet 101 and a water outlet 102 are provided; a multi-stage filtering mechanism located in the water purifier shell 1 is connected between the water inlet 101 and the water outlet 102; the water outlet 102 is also connected in series with at least two groups of gas-liquid dual-cavity buffer mechanisms located in the water purifier shell 1; any gas-liquid dual-cavity buffer mechanism includes a protective shell 2 and an air cavity 201 and a liquid cavity 202 arranged in the protective shell 2, and the air cavity 201 and the liquid cavity 202 are separated by an elastic pressure-resistant diaphragm 3; the liquid cavity 202 is connected to the water outlet 102, and the air cavity 201 is located on the side of the liquid cavity 202 away from the water outlet 102.

[0025] The multi-stage filtering water purifier of the embodiment of the present application is based on the elastic potential energy buffering principle of the elastic pressure-resistant diaphragm 3. The elastic pressure-resistant diaphragm 3 is deformed to generate a buffering fit between the air cavity 201 and the liquid cavity 202. The response speed to water hammer impact is fast, and no complex mechanical moving parts are required, which is convenient for maintenance. Moreover, the elastic pressure-resistant diaphragm 3 is used to isolate the gas and liquid phases, so the pollution resistance is strong, it is not easily affected by water quality, and there is no risk of stagnation.

[0026] Specifically, in this embodiment, a delivery pipe 11 is further provided in the water purifier housing 1, and the delivery pipe 11 includes a main pipeline 110 and at least two branch pipelines 111. The main pipeline 110 is respectively connected to the water outlet 102 and the multi-stage filtering mechanism through the three-way pipe 8, and the at least two branch pipelines 111 are connected to at least two liquid chambers 202 in a one-to-one correspondence. By connecting multiple groups of gas-liquid dual-cavity buffer mechanisms in series, it can be used to absorb shocks of different intensities in stages to cope with extreme high-pressure scenarios, and has a wide range of applications.

[0027] Specifically, in this embodiment, the air cavity 201 includes a first cavity and high-pressure nitrogen filled in the first cavity. Among them, the pressure in the air cavity 201 is 1.5 to 3 bar. The liquid cavity 202 includes a second cavity and a liquid medium filled in the second cavity. The liquid medium is, for example, water. When water hammer occurs (for example, the tap of the water purifier is suddenly closed): first, it undergoes high-pressure shock absorption: the instantaneous high pressure generated by the water flow impact is transmitted to the corresponding liquid cavity 202 through a main pipeline 110 and a corresponding branch pipeline 111, and the pressure of the liquid cavity 202 increases suddenly, pushing the elastic pressure-resistant diaphragm 3 to deform to compress the air cavity; then, it undergoes energy conversion: the nitrogen in the air cavity 201 generates a reaction force due to compression, and the pressure peak is released smoothly; finally, the pressure is restored: after the impact ends, the nitrogen in the air cavity 201 expands and resets, pushing the elastic pressure-resistant diaphragm 3 back to its original position, and the liquid cavity 202 returns to its initial state, ready to cope with the next impact.

[0028] The elastic pressure-resistant diaphragm 3 is made of rubber or polyurethane, which has good corrosion resistance and fatigue resistance to adapt to frequent pressure fluctuations. The rubber is, for example, EPDM rubber.

[0029] Specifically, in this embodiment, a first pressure sensor 4 is provided in the middle of one side surface of the elastic pressure-resistant diaphragm 3 located in the air cavity 201. A second pressure sensor 5 is provided in the middle of one side surface of the air cavity 201 opposite to the first pressure sensor 4. The first pressure sensor 4 and the second pressure sensor 5 are provided for timely and multi-point monitoring of pressure changes, thereby ensuring stable buffering performance.

[0030] Specifically, in this embodiment, the multi-stage filtering mechanism includes a first filter box 6 and a second filter box 7, the water inlet end of the first filter box 6 is connected to the water inlet 101, the water outlet end of the first filter box 6 is connected to the water inlet end of the second filter box 7, and the water outlet end of the second filter box 7 is connected to the three-way pipe 8.

[0031] Among them, the first filter box 6 is provided with a three-stage filter assembly, which includes a PP cotton filter element 61, a pre-activated carbon filter element 62 and a reverse osmosis filter element 63 which are connected in sequence; the PP cotton filter element 61 is also connected to the water inlet 101; the reverse osmosis filter element 63 is also connected to the water inlet end of the second filter box 7. The PP cotton filter element 61 is used to physically intercept large particles of impurities and protect the subsequent filter element from clogging, and the cost is relatively low. The pre-activated carbon filter element 62 can absorb residual chlorine and other foreign colors and odors through activated carbon to protect the filter membrane from oxidative damage. The reverse osmosis filter element 63 can further remove a variety of impurities and produce pure water.

[0032] Among them, the second filter box 7 is provided with a secondary filter assembly, which includes a post-activated carbon filter element 71 and a mineralized filter element 72 which are connected in sequence; the post-activated carbon filter element 71 is also connected to the reverse osmosis filter element 63; the mineralized filter element 72 is also connected to one of the pipe openings of the three-way pipe 8. The post-activated carbon filter element 71 is used to further absorb residual odor and improve the taste of the water. The mineralized filter element 72 can add trace elements to the pure water, and the use effect is better.

[0033] In actual use, the water inlet 101 on the water purifier housing 1 is connected to the tap water inlet through a water inlet pipe, and the water outlet 102 is connected to the water outlet faucet through a water outlet pipe.

[0034] It should be understood that ordinary technical workers in the field can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A multi-stage filtering water purifier, comprising a water purifier housing, wherein the water purifier housing is provided with a water inlet and a water outlet; characterized in that: A multi-stage filtering mechanism located in the water purifier shell is connected between the water inlet and the water outlet; the water outlet is also connected in series with at least two groups of gas-liquid dual-chamber buffer mechanisms located in the water purifier shell; any of the gas-liquid dual-chamber buffer mechanisms includes a protective shell and an air cavity and a liquid cavity arranged in the protective shell, and the air cavity and the liquid cavity are separated by an elastic pressure-resistant diaphragm; the liquid cavity is connected to the water outlet, and the air cavity is located on the side of the liquid cavity away from the water outlet.

2. The multi-stage filtering water purifier according to claim 1, characterized in that: A delivery pipe is also provided in the water purifier shell, and the delivery pipe includes a main pipeline and at least two branch pipelines; the main pipeline is connected to the water outlet and the multi-stage filtering mechanism respectively through a three-way pipe, and at least two branch pipelines are connected to at least two liquid chambers in a one-to-one correspondence.

3. The multi-stage filtering water purifier according to claim 1, characterized in that: The gas cavity comprises a first cavity and high-pressure nitrogen filled in the first cavity.

4. The multi-stage filtering water purifier according to any one of claims 1 to 3, characterized in that: The pressure in the air cavity is 1.5-3 bar.

5. The multi-stage filtering water purifier according to claim 1, characterized in that: The liquid cavity includes a second cavity and a liquid medium filled in the second cavity.

6. The multi-stage filtering water purifier according to claim 1, characterized in that: A first pressure sensor is provided at the middle of a surface of one side of the elastic pressure-resistant diaphragm located in the air cavity.

7. The multi-stage filtering water purifier according to claim 6, characterized in that: A second pressure sensor is provided in the middle of a surface on one side of the air cavity opposite to the first pressure sensor.

8. The multi-stage filtering water purifier according to claim 2, characterized in that: The multi-stage filtering mechanism includes a first filter box and a second filter box, the water inlet end of the first filter box is connected to the water inlet, the water outlet end of the first filter box is connected to the water inlet end of the second filter box, and the water outlet end of the second filter box is connected to the three-way pipe.

9. The multi-stage filtering water purifier according to claim 8, characterized in that: A three-stage filter assembly is provided in the first filter box, and the three-stage filter assembly includes a PP cotton filter element, a pre-activated carbon filter element and a reverse osmosis filter element which are connected in sequence; the PP cotton filter element is also connected to the water inlet; the reverse osmosis filter element is also connected to the water inlet end of the second filter box.

10. The multi-stage filtering water purifier according to claim 9, characterized in that: A secondary filter assembly is provided in the second filter box, and the secondary filter assembly includes a post-activated carbon filter element and a mineralized filter element which are connected in sequence; the post-activated carbon filter element is also connected to the reverse osmosis filter element; the mineralized filter element is also connected to one of the pipe openings of the three-way pipe.

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