Deep filtration device for tap water

Abstract

The utility model belongs to the technical field of tap water filtering, and particularly relates to a tap water deep filtering device which comprises a shell, a plurality of filter element chambers horizontally arranged in the shell and a water tank connected with the filter element chambers, and the water inlet end and the water outlet end of each filter element chamber are connected with connecting pipes. Wherein the connecting pipe at the water outlet end of the upstream filter element chamber is connected with the connecting pipe at the water inlet end of the downstream filter element chamber, and the water purifier further comprises a controller, a booster pump which is arranged at the water passing port of the water tank and is communicated with the interior of the water tank, and pressure sensors which are arranged on the connecting pipes. The controller regulates and controls the operation of the booster pump according to the water pressure difference between the connecting pipe at the water inlet end of each filter element chamber and the connecting pipe at the water outlet end of each filter element chamber, personalized treatment can be carried out according to the blocking conditions of different filter elements through precise backwashing pressure control, the situation that backwashing is not thorough due to insufficient pressure or the filter elements are damaged due to too large pressure is avoided, and the service life of the filter elements is prolonged. Therefore, the filtering performance of the whole tap water deep filtering device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of tap water filtration technology, specifically relating to a deep tap water filtration device. Background Technology

[0002] As people's living standards improve, their requirements for drinking water quality are becoming increasingly stringent. Tap water, as an important water source in people's daily lives, although undergoing preliminary purification treatment, may still contain impurities and microorganisms, posing potential threats to human health. Therefore, deep filtration devices for tap water play a crucial role in ensuring drinking water quality.

[0003] Existing tap water filtration devices mainly suffer from the following problems: For example, during the filtration process, impurities gradually accumulate in the filter element, leading to a decrease in filtration efficiency. To maintain the performance of the filter element, it needs to be backwashed regularly. However, traditional filtration devices often use a fixed pressure or simple control method during backwashing, failing to flexibly adjust the backwashing pressure according to the actual clogging level of the filter element. This results in the filter element being damaged due to excessive backwashing pressure when it is only slightly clogged; while when the filter element is severely clogged, insufficient backwashing pressure may fail to completely remove impurities, affecting the filter element's lifespan and filtration effect. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a deep filtration device for tap water, thereby solving the problems mentioned in the background art.

[0005] This utility model provides a deep filtration device for tap water, including a housing, multiple filter chambers horizontally arranged inside the housing, and a water tank connected to the filter chambers. Each filter chamber has an inlet and an outlet connected to a connecting pipe, wherein the connecting pipe at the outlet of the upstream filter chamber is connected to the connecting pipe at the inlet of the downstream filter chamber. The device also includes a controller, a booster pump installed at the water inlet of the water tank and communicating with the inside of the water tank, and a pressure sensor installed on each connecting pipe. The output end of the pressure sensor is connected to the signal input end of the controller to provide the controller with the water pressure signal on the corresponding connecting pipe. During backwashing, the controller regulates the operation of the booster pump according to the water pressure difference between the connecting pipe at the inlet and outlet of each filter chamber. The greater the water pressure difference, the higher the operating efficiency of the booster pump, thereby increasing the backwashing pressure on the filter within the pressure range that the filter can withstand.

[0006] Preferably, the connection pipe between the outlet end of the booster pump and the outlet end of the downstream filter chamber is connected by a backflush pipe. The backflush pipe is connected to multiple filter chambers through multiple backflush branch pipes, and each of the backflush branch pipes is equipped with a first valve.

[0007] Preferably, a liquid level sensor is installed on the inner top wall of the water tank to monitor the water level of the purified water in the tank in real time and transmit the water level signal to the controller.

[0008] Preferably, the controller controls the opening degree of the first valve based on the water level value of the purified water in the water tank monitored by the liquid level sensor and the water pressure difference between the connecting pipe at the inlet end and the connecting pipe at the outlet end of the filter chamber.

[0009] Preferably, each of the filter cartridge chambers is connected to a drain pipe with a second valve at its bottom. Multiple drain pipes are connected to a drain pipe located at the bottom of the housing cavity. When the controller controls the first valve corresponding to the filter cartridge chamber to open, it controls the second valve at the bottom of the filter cartridge chamber to open.

[0010] Preferably, it also includes a display screen installed on the housing, which is connected to the controller to display information such as the current working status, the water pressure difference between the connecting pipes at the inlet and outlet ends of each filter chamber, the water level in the tank, and the backwashing progress.

[0011] The beneficial effects of this utility model are as follows: The pressure sensor monitors the water pressure difference between the inlet and outlet pipes of the filter cartridge chamber in real time and transmits the signal to the controller. The controller controls the operation of the booster pump based on the water pressure difference. The greater the water pressure difference, the higher the operating efficiency of the booster pump. It can achieve backwashing of the filter cartridge at a greater pressure within the filter cartridge's tolerance range. This helps to remove impurities on the filter cartridge more effectively, improve the filtration effect and service life of the filter cartridge, and ensure the long-term stable operation of the filtration device. At the same time, precise backwashing pressure control can be used to handle the clogging of different filter cartridges in a personalized manner, avoiding incomplete backwashing due to insufficient pressure or damage to the filter cartridge due to excessive pressure, thereby improving the filtration performance of the entire deep filtration device for tap water.

[0012] Installing a liquid level sensor on the water tank allows for real-time monitoring of the purified water level. When the water level is within the preset range, the controller, in conjunction with the water pressure difference between the inlet and outlet pipes of the filter cartridge chamber, initiates the backwashing process and adjusts the opening of the corresponding first valve of the filter cartridge chamber. This prevents insufficient water level from reducing backwashing efficiency. Using purified water to backwash the filter cartridge can improve backwashing efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention without the shell.

[0015] Figure 3 This is a top view cross-sectional structural diagram of the present invention;

[0016] Figure 4 This is a side view sectional structural diagram of the present invention.

[0017] In the diagram: 1. Housing; 2. Filter element; 3. Filter element chamber; 4. Water tank; 5. Inlet; 6. Outlet; 7. Connecting pipe; 8. Booster pump; 9. Pressure sensor; 10. Backflush pipe; 11. Backflush branch pipe; 12. First valve; 13. Liquid level sensor; 14. Second valve; 15. Drain branch pipe; 16. Drain pipe; 17. Display screen; 18. Filter element mounting cavity; 19. Purified water cavity; 20. Cover. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0019] This utility model relates to a conventional deep filtration device for tap water, which mainly includes multiple filter chambers 3 with different filter elements 2. These filter chambers 3 are connected in series via connecting pipes 7 to form a complete water system. Commonly used filter elements 2 are typically four, arranged sequentially from the end closest to the tap water outlet to the end closest to the purified water tank 4: a pre-filter (PP cotton filter element), a pre-activated carbon filter element 2, a reverse osmosis membrane filter element 2, and a post-activated carbon filter element 2. Alternatively, it may include other filter elements 2 (not shown in the figure), such as an ultrafiltration membrane filter element 2, a ceramic filter element 2, or a KDF filter element 2, etc. Each filter chamber 3 has an inlet end 5 and an outlet end 6. A connecting pipe 7 is provided, in which the connecting pipe 7 of the outlet 6 of the upstream filter chamber 3 is connected to the connecting pipe 7 of the inlet 5 of the downstream filter chamber 3, and the pre-filter is connected to the tap water outlet. The post-activated carbon filter 2 is connected to the water tank 4 for storing purified water. The filter chamber 3 includes a filter installation cavity 18 and a cover 20 with a purified water cavity 19. The filter element 2 is installed in the filter installation cavity 18 by insertion. The bottom of the cover 20 abuts against the top of the filter element 2. When water enters the interior of the filter element 2 along the connecting pipe 7 of the inlet 5 of the filter chamber 3, it passes through the filter element 2 and enters the space between the filter element 2 and the inner wall of the filter chamber 3, and overflows into the purified water cavity. The water is stored in chamber 19 and discharged through the outlet pipe 7 on one side of the purified water chamber 19 to the downstream filter chamber 3. This process is repeated to achieve deep filtration of tap water. Each filter element 2 has its specific function: the PP cotton filter element 2 is mainly responsible for filtering out large particulate impurities in the water, such as silt and rust, to ensure the normal operation of subsequent filter elements 2; the activated carbon filter element 2 uses the adsorption properties of activated carbon to remove residual chlorine, odors, and some organic matter in the water, improving the taste of the water; the ultrafiltration membrane filter element 2 has a high filtration precision and can intercept bacteria, viruses, and some colloidal substances in the water; the reverse osmosis membrane filter element 2 has a filtration precision of up to 0.0001 microns. It can remove almost all impurities such as heavy metals, organic matter, bacteria, and viruses from water, resulting in pure water that can be drunk directly. The purified water is stored in water tank 4 for user use. When the water purifier reaches the backwash time, before backwashing, close the water inlet valve of the water purifier (the valve on the pipe between the pre-filter and the tap water outlet 6) to prevent new water from entering the water purifier and ensure the smooth progress of the backwashing process. At the same time, open the drain valve on the water purifier to allow the impurities and sewage in the filter element 2 to be discharged smoothly. After the backwashing is completed, close the drain valve. The above is an introduction to the existing deep filtration device for tap water.

[0020] As can be seen from the above, existing deep filtration devices for tap water have the following defects when in use: Existing tap water purifiers determine whether filter element 2 needs rinsing based on its usage time, rinsing it once every certain period. Traditional filtration devices often use a fixed pressure or simple control method during backwashing, failing to flexibly adjust the backwashing pressure according to the actual clogging condition of filter element 2. This results in filter element 2 being damaged due to excessive backwashing pressure when the clogging is minor; conversely, insufficient backwashing pressure may fail to thoroughly remove impurities when the clogging is severe, affecting the lifespan and filtration effect of filter element 2. Furthermore, existing filtration devices struggle to accurately obtain filter element clogging information, typically requiring manual periodic inspection and replacement, which not only increases maintenance costs and workload but also fails to detect clogging problems in a timely manner, potentially leading to water quality deterioration. Based on these problems, this utility model adopts the following improvement method to solve them.

[0021] like Figure 1-4 As shown, a deep filtration device for tap water, based on existing technology, further includes pressure sensors 9 installed on each connecting pipe 7, a controller connected to the pressure sensors 9, and a booster pump 8 installed at the water inlet of the water tank 4 and connected to the inside of the water tank 4 (the booster pump 8 is a bidirectional booster pump 8, which can realize bidirectional flow and pressurization of water, that is, it can realize the flow of purified water in the filter chamber 3 to the water tank 4 through the booster pump 8 and the flow of water in the water tank 4 to the outlet through the booster pump 8). The output end of the pressure sensor 9 is connected to the signal input end of the controller to provide the controller with the water pressure signal on its respective connecting pipe 7. The pressure sensor 9 adopts the piezoresistive or capacitive measurement principle to convert the water pressure change into an electrical signal and transmit it to the controller, which can accurately monitor the water pressure difference between the connecting pipe 7 at the inlet end 5 of the filter chamber and the connecting pipe 7 at the outlet end 6. During backwashing, the controller regulates the operation of the booster pump 8 based on the water pressure difference between the connecting pipe 7 at the inlet end 5 and the connecting pipe 7 at the outlet end 6 of each filter cartridge chamber. The greater the water pressure difference, the higher the operating efficiency of the booster pump 8, thereby increasing the backwashing pressure on the filter cartridge 2 within the pressure range that the filter cartridge 2 can withstand. During backwashing, using purified water from the water tank 4 can improve the backwashing efficiency and prevent the filter cartridge 2 from being contaminated by impurities in the water again. Typically, the pressure range that the pre-filter can withstand is 0.1 to 0.3 MPa, and the pressure range that the pre-activated carbon filter cartridge 2, reverse osmosis membrane filter cartridge 2, and post-activated carbon filter cartridge 2 can withstand is 0.2 to 0.4 MPa. During backwashing, it should be ensured that the pressure is stable and does not exceed the design withstand range of the filter cartridge 2 to avoid damaging the filter cartridge 2 and affecting the backwashing efficiency of the filter cartridge 2.

[0022] Furthermore, such as Figure 2-4As shown, to avoid problems such as low water level in water tank 4 affecting the backwashing efficiency of filter element 2 or excessive water level causing overflow, and to ensure the normal operation of the entire filtration device and the rational use of water resources, a liquid level sensor 13 is installed on the inner top wall of water tank 4. This sensor monitors the water level in water tank 4 in real time and transmits the monitored water level signal to the controller. The liquid level sensor 13 uses photoelectric or float-type measurement technology to monitor the water level of purified water in water tank 4 in real time. The controller pre-sets the safe water level range of water tank 4 and also pre-sets the connection pipes 7 and 6 of the inlet and outlet ends of each filter element chamber. The water pressure difference threshold between 7 is determined by the fact that there are multiple filter chambers 3. The outlet 6 of the booster pump 8 is connected to the outlet 6 of the downstream filter chamber 3 via a backwash pipe 10. The backwash pipe 10 is connected to multiple filter chambers 3 via multiple backwash branch pipes 11, each equipped with a first valve 12. Each filter chamber 3 has a drain branch pipe 15 with a second valve 14 connected to its bottom. These drain branch pipes 15 are connected to a drain pipe 16 located at the bottom of the inner cavity of the housing 1. Both the first valve 12 and the second valve 14 are electric valves controlled by a controller. Specifically, during normal water production... During the process, the controller monitors whether the water pressure difference between the connecting pipe 7 at the inlet end 5 and the connecting pipe 7 at the outlet end 6 of each filter chamber is within the normal range. If the water pressure difference is normal, it indicates that the filter element 2 is only slightly clogged, and the water purifier continues to produce water. When the controller detects that the water pressure difference between the connecting pipe 7 at the inlet end 5 and the connecting pipe 7 at the outlet end 6 of a certain filter chamber exceeds the preset water pressure difference value, and the water level in the water tank 4 is within the safe water level range, it indicates that the filter element 2 may be clogged and needs to be backwashed. The controller will start the backwashing program, first controlling the opening of the first valve 12, and simultaneously controlling the bottom of the filter chamber 3. The second valve 14 of the part is opened, and the pressure of the booster pump 8 is adjusted so that the pressure of the booster pump 8 corresponds to the water pressure difference between the inlet end 5 connecting pipe 7 and the outlet end 6 connecting pipe 7 of the filter element chamber 3 at this time. When the controller detects that the water pressure difference between the inlet end 5 connecting pipe 7 and the outlet end 6 connecting pipe 7 of multiple filter element chambers exceeds the preset water pressure difference value, the filter element 2 in the filter element chamber 3 is backwashed in sequence (i.e., the order of pre-filter, pre-activated carbon filter element 2, reverse osmosis membrane filter element 2, and post-activated carbon filter element 2). The wastewater after rinsing the filter element 2 is discharged into the drain pipe 16 along the drain branch pipe 15.

[0023] Furthermore, such as Figure 1As shown, to facilitate users' understanding of the real-time status of the water purifier, a display screen 17 is installed on the outside of the water purifier's casing 1. This display screen 17 is connected to the controller and is used to display the current status of the water purifier in real time, such as water production, backwashing, standby, etc. It can also display the water pressure difference between the connecting pipe 7 of the inlet end 5 and the connecting pipe 7 of the outlet end 6 of each filter chamber, the water level of the water tank 4, and the progress of backwashing, such as the filter chamber 3 being flushed, the filter chamber 3 not being flushed, and the estimated remaining backwashing time. To facilitate user operation and use, the display screen 17 is designed with a simple and easy-to-understand operating interface. Users can use the touch screen or buttons to query the historical operating data of the device, set system parameters, and perform other operations. At the same time, the display screen 17 will also prompt the user in a prominent manner when a fault or abnormal situation occurs, and display the corresponding fault code and solution suggestions.

[0024] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of this utility model. The above examples are merely to aid in understanding the method and core ideas of this utility model. The above descriptions are only preferred embodiments of this utility model. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of this utility model, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this utility model.

Claims

1. A deep filtration device for tap water, comprising a housing (1), a plurality of filter chambers (3) arranged horizontally inside the housing (1), and a water tank (4) connected to the filter chambers (3), wherein each filter chamber (3) has a connecting pipe (7) connected to its inlet (5) and outlet (6), wherein the connecting pipe (7) of the outlet (6) of the upstream filter chamber (3) is connected to the connecting pipe (7) of the inlet (5) of the downstream filter chamber (3), characterized in that: It also includes a controller, a booster pump (8) installed at the water inlet of the water tank (4) and connected to the inside of the water tank (4), and a pressure sensor (9) installed on each of the connecting pipes (7). The output end of the pressure sensor (9) is connected to the signal input end of the controller and is used to provide the controller with the water pressure signal on the corresponding connecting pipe (7). During backwashing, the controller adjusts the operation of the booster pump (8) according to the water pressure difference between the connecting pipe (7) at the inlet end (5) and the connecting pipe (7) at the outlet end (6) of each filter element chamber. The greater the water pressure difference, the higher the operating efficiency of the booster pump (8), thereby increasing the backwashing pressure on the filter element (2) within the pressure range that the filter element (2) can withstand.

2. A tap water deep filtration device according to claim 1, characterized in that: The water outlet (6) of the booster pump (8) is connected to the water outlet (6) of the downstream filter chamber (3) by a backflush pipe (10). The backflush pipe (10) is connected to multiple filter chambers (3) by multiple backflush branch pipes (11), and each backflush branch pipe (11) is equipped with a first valve (12).

3. A tap water deep filtration device according to claim 2, characterized in that: A liquid level sensor (13) is installed on the inner top wall of the water tank (4) to monitor the water level of the purified water in the water tank (4) in real time and transmit the water level signal to the controller.

4. A tap water deep filtration device according to claim 3, characterized in that: The controller controls the opening degree of the first valve (12) based on the water level value of the purified water in the water tank (4) monitored by the liquid level sensor (13) and the water pressure difference between the connecting pipe (7) of the inlet end (5) of the filter chamber and the connecting pipe (7) of the outlet end (6).

5. The device for deep filtration of tap water according to claim 1, characterized in that Each filter chamber (3) is connected to a drain pipe (15) with a second valve (14) at its bottom. Multiple drain pipes (15) are connected to a drain pipe (16) located at the bottom of the inner cavity of the housing (1). When the controller controls the first valve (12) corresponding to the filter chamber (3) to open, it controls the second valve (14) at the bottom of the filter chamber (3) to open.

6. A tap water depth filter device according to any one of claims 1-5, characterized in that: It also includes a display screen (17) installed on the housing (1), which is connected to the controller to display the current working status, the water pressure difference between the connecting pipe (7) of the inlet end (5) of each filter chamber and the connecting pipe (7) of the outlet end (6), the water level of the water tank (4), and the backwashing progress information.

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