Automatic water storage device with water purification and water saving functions

Abstract

The utility model provides a kind of automatic water storage equipment with water purification and water saving function, including front device, rear device, front device is connected with several rear devices and water using equipment by water supply pipeline, each rear device is connected in series / parallel with front device, front device is equipped with faucet, cylindrical two-way ventilation one-way liquid stop valve and with anti-backflow closestool water tank pipeline connection's discharge sediment port, discharge float sediment port, rear device is connected by water purification device and water storage tank pipeline, water storage tank is connected with water using equipment pipeline by pipeline, the utility model has the beneficial effect that: the equipment combination is flexible and changeable, can be freely selected according to demand specified quantity of rear device and filter core, can automatically store water, continuous pressure maintaining, provide emergency water storage, multiple water purification structures are set, good purification effect, ensure water quality, low in cost, waste water in purification process can be used for closestool flushing, effectively water saving, equipment reliability is good, service life is long.

Description

[Technical Field]

[0001] This utility model relates to a water storage device, and more particularly to an automatic water storage device with water purification and water-saving functions. [Background Technology]

[0002] With the improvement of living standards, people have increasingly higher requirements for the quality of water used in various applications. Currently, whole-house water purifiers are becoming increasingly popular. However, current whole-house water purifiers have the following shortcomings: 1. Current whole-house water purifiers only have a filtration function and lack a water storage function. They cannot operate during water or power outages, resulting in a lack of usable water. This is especially problematic in remote areas far from urban centers and rural areas where water supply stability and quality are easily affected by extreme weather, making it even more necessary to have a constant supply of clean water in case of disasters. 2. The pre-filter in current whole-house water purifiers, which connects directly to the external water source, performs the first stage of filtration, adsorbing a large amount of impurities and requiring frequent manual cleaning. The post-filter also requires frequent replacement. 3. Currently, the filtration process of some filter cartridges generates wastewater containing a lot of impurities, such as the filtration wastewater of RO membrane filter cartridges. This filtration wastewater is usually directly discharged into the sewage system, which will cause water waste and is not conducive to water conservation. The applicant previously applied for a non-powered automatic water purification and automatic water storage device (patent number 202111128822.4), which is an automatic water storage device that can perform preliminary filtration and purification of water source through the scum discharge port. However, the structure of this device can only effectively filter out larger particles of impurities and cannot filter out small impurities such as heavy metals, bacteria and viruses. It cannot provide water with different water quality standards. Therefore, the applicant has developed and improved this automatic water storage device with water purification and water conservation functions. [Utility Model Content]

[0003] The purpose of this utility model is to solve the above-mentioned problems existing in various whole-house water purifier products in daily life, and to provide an automatic water storage device with water purification and water-saving functions.

[0004] This utility model is achieved through the following technical solution: an automatic water storage device with water purification and water-saving functions, including a pre-filter and a post-filter. The pre-filter is a box-shaped or tank-shaped water storage device. A water inlet is provided on the lower part of the side wall of the pre-filter, and a one-way check valve is installed on the water inlet. The pre-filter is connected to an external water supply network via the one-way check valve. A water outlet is provided on the upper part of the side wall of the pre-filter, and a filter screen is installed at the water outlet. The water outlet is connected to several post-filters and water-using equipment via a water supply pipe. Each post-filter is connected to the pre-filter in series / parallel via a pipe. A sludge discharge port is provided at the lowest point of the bottom surface of the pre-filter, and a sludge discharge one-way check valve is installed on the sludge discharge port. A scum discharge port is provided at the highest point of the top surface of the pre-filter, and a scum discharge valve is installed on the scum discharge port. The system includes a sludge one-way check valve, and both the sludge discharge one-way check valve and the scum discharge one-way check valve are connected to the anti-backflow toilet tank pipe via pipelines. A water inlet is located at the connection area between the side wall and bottom of the pre-filter, and a faucet is installed on the water inlet. A pressure balance port is also located on the top surface of the pre-filter, and a cylindrical bidirectional venting one-way check valve is installed on the pressure balance port. The post-filter consists of a water purification device and a water storage tank. The water purification device is installed at the bottom of the post-filter, and the water storage tank is installed at the top of the post-filter. The water storage tank and the water purification device are connected by a detachable pipeline. The inlet of the water purification device is connected to the outlet pipe of the pre-filter via a pipeline, and the outlet of the water purification device is connected to the inlet of the water storage tank or the corresponding water-using equipment via a pipeline. The outlet of the water storage tank is connected to the corresponding water-using equipment via a pipeline.

[0005] Furthermore, the water purification device includes a filter cartridge mounting frame, a PP cotton filter cartridge, an activated carbon filter cartridge, a KDF filter cartridge, an ultrafiltration membrane filter cartridge, and an RO membrane filter cartridge. The filter cartridge mounting frame is installed at the bottom of the post-purification device and has five filter cartridge mounting slots. The PP cotton filter cartridge, activated carbon filter cartridge, KDF filter cartridge, ultrafiltration membrane filter cartridge, and RO membrane filter cartridge are sequentially installed in the five filter cartridge mounting slots of the filter cartridge mounting frame. The filter cartridge mounting frame, along with the PP cotton filter cartridge, activated carbon filter cartridge, KDF filter cartridge, ultrafiltration membrane filter cartridge, and RO membrane filter cartridge, are all detachable installation structures. The inlet of the PP cotton filter element is connected to the outlet pipe of the pre-filter. The outlet of the PP cotton filter element is connected to the inlet pipe of the activated carbon filter element. The outlet of the activated carbon filter element is connected to the inlet pipe of the KDF filter element. The outlet of the KDF filter element is connected to the inlet pipe of the ultrafiltration membrane filter element. The outlet of the ultrafiltration membrane filter element is connected to the inlet pipe of the RO membrane filter element. The outlet of the RO membrane filter element is connected to the inlet pipe of the water storage tank. The wastewater outlet of the RO membrane filter element is connected to the redundant space pipe at the top of the overflow pipe of the toilet tank through a pipe.

[0006] Furthermore, the water storage tank is composed of several small water storage tanks connected in series / parallel or a single independent water storage tank. The inlet end of the first-stage small water storage tank is connected to the outlet end of the water purification device through a pipe, and the outlet end of the last-stage small water storage tank is connected to the corresponding water-using equipment through a pipe.

[0007] Furthermore, a faucet is installed in the connection area between the side wall and the bottom of the water storage tank, and a cylindrical two-way venting one-way check valve is provided on the water storage tank. If the water storage tank is composed of several small water storage tanks connected in series / parallel, the cylindrical two-way venting one-way check valve is installed on the top of the last small water storage tank; if the water storage tank is an independent water storage tank, the cylindrical two-way venting one-way check valve is installed on the top of the independent water storage tank.

[0008] Furthermore, the pipe connection structures between each component of the pre-processor, each component of the post-processor, and the water-using equipment are all equipped with one-way check valves.

[0009] Furthermore, the pre-installed device, the small water storage tank, and the independent water storage tank are all made of rigid, pressure-resistant material.

[0010] Furthermore, the cylindrical bidirectional venting one-way check valve includes a first cylinder, a second cylinder, a sealing ring, a T-shaped valve core, a spring, and a float. The lower part of the first cylinder is tightly connected to the air pressure balance port. The upper inner wall of the first cylinder has an internal thread structure, and the lower outer wall of the second cylinder has an external thread structure. The lower part of the second cylinder is tightly threaded to the upper part of the first cylinder. The upper part of the second cylinder has an inwardly extending boss with a sealing ring. The bottom of the second cylinder has an inwardly extending limiting block. The second cylinder contains a T-shaped valve core with a circular top surface. The diameter of the T-cap at the top of the T-shaped valve core is smaller than the internal space diameter of the second cylinder but larger than the inwardly extending boss at the top of the second cylinder. The inner diameter of the platform, the T-shaped valve core has a spring fitted on its T-handle, the two ends of the spring pressing on the top surface of the limiting block extending inward from the bottom of the second cylinder and the bottom surface of the T-cap of the T-shaped valve core respectively, the lower part of the T-handle of the T-shaped valve core passes through the through hole of the limiting block in the second cylinder and extends downward into the inner space of the first cylinder, the bottom end of the T-handle of the T-shaped valve core is fixed with a float, the float is suspended in the inner space of the first cylinder, the float is a sealed hollow cylinder, the outer diameter of the float is smaller than the inner diameter of the first cylinder, the outer diameter of the float is larger than the through hole diameter of the limiting block at the bottom of the second cylinder, the height of the float that can be raised and lowered in the first cylinder is greater than the height of the T-shaped valve core that can be raised and lowered in the second cylinder.

[0011] Furthermore, the heights of the various openings on the pre-treatment device from bottom to top are: sludge discharge port, water intake port, water inlet, water outlet, air pressure balance port, and scum discharge port.

[0012] An installation and usage method for an automatic water storage device with water purification and water-saving functions: The pre-filter is installed near the point where the external water supply network connects to the indoor environment, either indoors or outdoors. The external water supply network is connected to the inlet of the pre-filter. Then, a pipe is connected to the outlet of the pre-filter to connect to the downstream devices and the water-using equipment. Both the sediment discharge port and the scum discharge port are connected to the anti-backflow toilet tank pipe via pipes. The downstream devices are installed near the pre-filter or near water-using equipment with high water quality requirements. Depending on the installation environment, each downstream device is connected in series or parallel with the pre-filter via pipes. When each downstream device is connected in series with the pre-filter, a PP cotton filter is installed in the water purification device of each downstream device. The system uses one of the following filters: PP cotton filter, activated carbon filter, KDF filter, ultrafiltration membrane filter, and RO membrane filter. Only one of each filter type needs to be installed. All post-filters are connected in series to form a multi-stage filtration structure. The same filter type does not need to be installed repeatedly in different post-filters. Each post-filter is connected to the corresponding water-using equipment with the required water quality via a water outlet pipe to obtain the corresponding filtered water. For example, the outlet of the pre-filter is connected in series with five post-filters. The five post-filters, in sequence, are: the first stage post-filter with a PP cotton filter, the second stage post-filter with an activated carbon filter, the third stage post-filter with a KDF filter, the fourth stage post-filter with an ultrafiltration membrane filter, and the fifth stage post-filter with an RO membrane filter. Five-stage post-filter system; when each post-filter is connected in parallel with the pre-filter, each post-filter needs to install one or more of the following filters in its purification device, based on the water quality requirements of the corresponding connected water-using equipment: PP cotton filter, activated carbon filter, KDF filter, ultrafiltration membrane filter, and RO membrane filter. All post-filters are connected in parallel to form a non-interfering water supply network. For example, if the outlet of the pre-filter is connected in parallel to six non-interconnected post-filters through a pipeline, the first post-filter has a PP cotton filter, the second has a PP cotton filter and an activated carbon filter, the third has an activated carbon filter and an RO membrane filter, and the fourth has a PP cotton filter, an activated carbon filter, and an ultrafiltration membrane filter. The fifth post-filter is equipped with a PP cotton filter, an activated carbon filter, a KDF filter, and an ultrafiltration membrane filter. The sixth post-filter is equipped with a PP cotton filter, an activated carbon filter, a KDF filter, an ultrafiltration membrane filter, and an RO membrane filter. All post-filters with RO membrane filters are connected to wastewater discharge pipes leading to the redundant space above the overflow pipe of the toilet tank. For water with lower quality requirements, such as for bathing, the water can be directly connected to the water-using equipment through a pipe from the outlet of the pre-filter. For water with higher quality requirements, such as for boiling water or drinking water, the water is connected to the post-filter with the corresponding filter through a pipe from the outlet of the pre-filter. After purification by the post-filter, the filtered water is then output to the corresponding water-using equipment.

[0013] The beneficial effects of this utility model are as follows: 1. The pre- and post-construction devices of this application, as a combined structure connecting the water supply network and the water-using equipment, can maintain the pre- and post-construction devices in a full water state for a long time when the water supply network is supplying water normally, realizing automatic water storage. Furthermore, the water stored in the tank can flow as a whole each time the water-using equipment uses water, ensuring the fluidity of the stored water, effectively preventing the water quality from deteriorating and ensuring the cleanliness of the water. In case of power outages, water outages, or when water needs to be used near the pre- and post-construction devices, the stored water can also be drawn from the tank through the faucets on the pre- and post-construction devices; 2. This application is a multi-stage water purification device. The first stage of purification is achieved by the pre-construction device using the height difference between the inlet and outlet and various other methods. The difference in specific gravity between impurities and water effectively separates sediment and scum from the water. This causes sediment (greater than water), such as silt, to sink, while scum (lighter than water), such as cotton fibers, floats. The water containing this sediment is then discharged through the sediment and scum discharge ports and used for flushing the toilet, achieving automatic water purification. The second purification structure uses a filter screen at the outlet of the pre-filter to further intercept larger particles. The third purification structure consists of post-filters connected in series / parallel to the pre-filter, which use their filter cartridges for high-precision filtration. This multi-stage purification structure not only purifies the water more effectively and with higher precision, but also allows for efficient sediment removal from the pre-filter. The inlet, scum discharge outlet, and filter screen device can effectively remove a significant portion of the larger particulate impurities in the initial water source, preventing these impurities from adhering to and clogging the filter cartridges of the subsequent devices. This ensures that the water contacted by the filter cartridges of the subsequent devices is cleaner than the initial water source, effectively reducing the filtration difficulty and equipment wear of each filter cartridge in the subsequent devices. It also slows down the amount of impurities adsorbed on the filter cartridges, reduces the frequency of cleaning and replacement, improves the efficiency and lifespan of the filter cartridges, and lowers the operating cost. Furthermore, the reduced filtration difficulty allows for the use of smaller, lower-power filter cartridges, further reducing equipment costs. 3. This application uses water containing a relatively high amount of impurities in the scum discharge outlet and scum discharge outlet areas as toilet flushing water, which not only effectively utilizes water containing a relatively high amount of impurities... The wastewater can be flushed frequently through the toilet, a tool used frequently in homes and offices, to remove sediment and scum from the pre-filter, preventing sediment and scum from accumulating in the pre-filter and ensuring the cleanliness of the inner wall and water storage inside the pre-filter. The wastewater from the RO membrane filter is discharged into the toilet tank through the redundant space above the overflow pipe, replenishing the water in the toilet tank and reducing the amount of water entering the toilet. When the overflow exceeds the overflow line, it will also flow into the toilet through the overflow pipe to clean the toilet. The connection between the sediment discharge port, the scum discharge port, and the wastewater discharge port of the RO membrane filter to the toilet tank allows for more efficient use of water resources, enabling wastewater to be further utilized without being directly discharged into the sewage network, thus achieving the goal of water conservation.4. The number of post-filters and the installation of filter cartridges in each post-filter are flexible and versatile, allowing for diverse combinations. Depending on the different water quality requirements of the home or office environment, one or more post-filters with different filter cartridges can be connected in series or parallel to the pre-filter. These post-filters are then connected to various water-using devices. The water storage tank and the water purification device are connected by detachable pipes. When space is limited or water storage is not required, only the water purification device can be installed. When needed, the device can be opened to directly introduce water that has undergone preliminary filtration in the pre-filter, which is then purified and directly output to the corresponding water source. In special circumstances, the water-using equipment can also directly connect an external tap water pipe to the post-filter, achieving water filtration directly through the post-filter; 5. Both the pre-filter and post-filter of this application are equipped with a cylindrical bidirectional venting one-way check valve. The structure of the cylindrical bidirectional venting one-way check valve ensures that the T-type valve core achieves the sealing effect of the cylindrical bidirectional venting one-way check valve under the upward thrust of the spring, float, and the water itself, realizing automatic pressure balance inside the tank and preventing water overflow. When water is needed, the drain switch is opened, and under the action of atmospheric pressure and the downward pull of the float's own weight, the valve opens downward, allowing air to enter the tank and releasing the stored water. [Attached Image Description]

[0014] Figure 1 This is a schematic diagram of the structure of the front-end device and the rear-end device of this utility model connected in series;

[0015] Figure 2 This is a schematic diagram of the structure of the front-end device and the rear-end device of this utility model connected in parallel;

[0016] Figure 3 This is a schematic diagram of the structure of the front-end device of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the upper water storage tank of the rear device of this utility model, which is composed of several small water storage tanks connected in series.

[0018] Figure 5 This is a schematic diagram of the structure of the upper water storage tank of the rear device of this utility model, which is a single independent water storage tank;

[0019] Figure 6 This is a schematic diagram of the water purification device of this utility model;

[0020] Figure 7 This is a schematic diagram of the structure of the cylindrical bidirectional venting one-way check valve of this utility model;

[0021] Figure 8 This is an exploded view of the cylindrical bidirectional venting one-way check valve of this utility model.

[0022] Reference numerals: 1. Pre-filter; 11. Inlet check valve; 12. Outlet; 13. Filter screen; 14. Sludge removal check valve; 15. Floating scum removal check valve; 16. Faucet; 17. Cylindrical bidirectional venting check valve; 171. First cylinder; 172. Second cylinder; 173. Sealing ring; 174. T-type valve core; 175. Spring; 176. Float; 2. Post-filter; 21. Water purification device; 211. Filter cartridge mounting bracket; 212. PP cotton filter cartridge; 213. Activated carbon filter cartridge; 214. KDF filter cartridge; 215. Ultrafiltration membrane filter cartridge; 216. RO membrane filter cartridge; 22. Water storage tank; 221. Small water storage tank; 222. Independent water storage tank; 3. Water-using equipment; 4. Anti-backflow toilet tank.

Detailed Implementation Methods

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, an automatic water storage device with water purification and water-saving functions includes a pre-filter 1 and a post-filter 2. The pre-filter 1 is a box-shaped or tank-shaped water storage device. A water inlet is located on the lower part of the side wall of the pre-filter 1, and a one-way check valve 11 is installed on the inlet. The pre-filter 1 is connected to an external water supply network via the one-way check valve 11. A water outlet 12 is located on the upper part of the side wall of the pre-filter 1, and a filter screen 13 is installed at the outlet 12. The outlet 12 is connected to several post-filters 2 and water-using devices 3 via water supply pipes. Each post-filter 2 is connected to the pre-filter 1 in series / parallel via pipes. A sludge discharge port is located at the lowest point of the bottom surface of the pre-filter 1, and a sludge discharge one-way check valve 14 is installed on the sludge discharge port. A scum discharge port is located at the highest point of the top surface of the pre-filter 1, and a scum discharge one-way check valve 15 is installed on the scum discharge port. Both the check valve 14 and the scum discharge check valve 15 are connected to the anti-backflow toilet tank 4 via pipes. The connection area between the side wall and the bottom of the pre-filter 1 is provided with a water inlet, and a faucet 16 is installed on the water inlet. The top surface of the pre-filter 1 is also provided with a pressure balance port, and a cylindrical bidirectional venting check valve 17 is installed on the pressure balance port. The post-filter 2 consists of a water purification device 21 and a water storage tank 22. The water purification device 21 is installed at the bottom of the post-filter 2, and the water storage tank 22 is installed at the top of the post-filter 2. The water storage tank 22 and the water purification device 21 are connected by a detachable pipe. The inlet of the water purification device 21 is connected to the outlet 12 of the pre-filter 1 via a pipe. The outlet of the water purification device 21 is connected to the inlet of the water storage tank 22 or the corresponding water-using device 3 via a pipe. The outlet of the water storage tank 22 is connected to the corresponding water-using device 3 via a pipe.

[0025] Preferably, the water purification device 21 includes a filter element mounting frame 211, a PP cotton filter element 212, an activated carbon filter element 213, a KDF filter element 214, an ultrafiltration membrane filter element 215, and an RO membrane filter element 216. The filter element mounting frame 211 is installed at the lower part of the rear device 2. The filter element mounting frame 211 has five filter element mounting slots. The PP cotton filter element 212, activated carbon filter element 213, KDF filter element 214, ultrafiltration membrane filter element 215, and RO membrane filter element 216 are installed sequentially in the five filter element mounting slots of the filter element mounting frame 211. The filter element mounting frame 211 and the PP cotton filter element 212, activated carbon filter element 213, KDF filter element 214, ultrafiltration membrane filter element 215, and RO membrane filter element 216 are all... The PP cotton filter element 212 has a detachable installation structure. The inlet end of the PP cotton filter element 212 is connected to the outlet 12 of the pre-filter 1. The outlet end of the PP cotton filter element 212 is connected to the inlet end of the activated carbon filter element 213. The outlet end of the activated carbon filter element 213 is connected to the inlet end of the KDF filter element 214. The outlet end of the KDF filter element 214 is connected to the inlet end of the ultrafiltration membrane filter element 215. The outlet end of the ultrafiltration membrane filter element 215 is connected to the inlet end of the RO membrane filter element 216. The outlet end of the RO membrane filter element 216 is connected to the inlet end of the water storage tank 22. The wastewater outlet of the RO membrane filter element 216 is connected to the redundant space pipe at the top of the overflow pipe of the toilet tank through a pipe.

[0026] Preferably, the water storage tank 22 is composed of several small water storage tanks 221 connected in series / parallel or a single independent water storage tank 222. The water inlet of the first-stage small water storage tank 221 is connected to the water outlet of the water purification device 21 through a pipe, and the water outlet of the last-stage small water storage tank 221 is connected to the corresponding water-using equipment 3 through a pipe.

[0027] Preferably, a faucet 16 is installed in the connection area between the side wall and the bottom of the water storage tank 22, and a cylindrical bidirectional venting one-way check valve 17 is provided on the water storage tank 22. If the water storage tank 22 is composed of several small water storage tanks 221 connected in series / parallel, the cylindrical bidirectional venting one-way check valve 17 is installed on the top of the last small water storage tank 221; if the water storage tank 22 is an independent water storage tank 222, the cylindrical bidirectional venting one-way check valve 17 is installed on the top of the independent water storage tank 222.

[0028] Preferably, the pipe connection structure between each component of the pre-processor 1, each component of the post-processor 2, and the water-using equipment 3 is equipped with a one-way check valve.

[0029] Preferably, the pre-installed device 1, the small water storage tank 221, and the independent water storage tank 222 are all made of rigid pressure-resistant material.

[0030] Preferably, the cylindrical bidirectional venting one-way check valve 17 includes a first cylinder 171, a second cylinder 172, a sealing ring 173, a T-shaped valve core 174, a spring 175, and a float 176. The lower part of the first cylinder 171 is tightly connected to the air pressure balance port. The upper inner wall of the first cylinder 171 has an internal thread structure, and the lower outer wall of the second cylinder 172 has an external thread structure. The lower part of the second cylinder 172 is tightly threaded to the upper part of the first cylinder 171. The upper part of the second cylinder 172 has an inwardly extending boss with a sealing ring 173. The bottom of the second cylinder 172 has an inwardly extending limiting block. The second cylinder 172 contains a T-shaped valve core 174. The top surface of the T-shaped valve core 174 is circular. The diameter of the T-cap at the top of the T-shaped valve core 174 is smaller than the inner diameter of the second cylinder 172 but larger than the inwardly extending boss at the top of the second cylinder 172. The inner diameter of the T-shaped valve core 174 is specified. A spring 175 is fitted onto the T-handle of the T-shaped valve core 174. The two ends of the spring 175 press against the top surface of the limiting block extending inward from the bottom of the second cylinder 172 and the bottom surface of the T-cap of the T-shaped valve core 174, respectively. The lower part of the T-handle of the T-shaped valve core 174 passes through the through hole of the limiting block in the second cylinder 172 and extends downward into the inner space of the first cylinder 171. A float 176 is installed and fixed at the bottom end of the T-handle of the T-shaped valve core 174. The float 176 is suspended in the inner space of the first cylinder 171. The float 176 is a sealed hollow cylinder. The outer diameter of the float 176 is smaller than the inner diameter of the first cylinder 171. The outer diameter of the float 176 is larger than the through hole diameter of the limiting block at the bottom of the second cylinder 172. The height of the float 176 that can be raised and lowered in the first cylinder 171 is greater than the height of the T-shaped valve core 174 that can be raised and lowered in the second cylinder 172.

[0031] Preferably, the heights of the openings on the pre-mounted device 1 from bottom to top are: sludge discharge port, water intake port, water inlet, water outlet 12, air pressure balance port, and scum discharge port.

[0032] Based on the disclosure and teachings of the above specification, those skilled in the art can make appropriate changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. An automatic water storage device with water purification and water-saving functions, characterized in that: The system includes a pre-filter and post-filters. The pre-filter is a box-shaped or tank-shaped water storage device. An inlet is located on the lower part of the side wall of the pre-filter, and a one-way check valve is installed on the inlet. The pre-filter is connected to an external water supply network via the one-way check valve. An outlet is located on the upper part of the side wall of the pre-filter, and a filter screen is installed at the outlet. The outlet is connected to several post-filters and water-using equipment via a water supply pipe. Each post-filter is connected to the pre-filter in series / parallel via a pipe. A sludge discharge port is located at the lowest point of the bottom surface of the pre-filter, and a sludge discharge one-way check valve is installed on the sludge discharge port. A scum discharge port is located at the highest point of the top surface of the pre-filter, and a scum discharge one-way check valve is installed on the scum discharge port. The scum discharge check valves are all connected to the anti-backflow toilet tank pipes via pipelines. The pre-filter has a water inlet at the connection area between its side wall and bottom, with a faucet installed on the inlet. The top surface of the pre-filter also has a pressure balancing port, with a cylindrical bidirectional venting check valve installed on it. The post-filter consists of a water purification device and a water storage tank. The water purification device is installed at the bottom of the post-filter, and the water storage tank is installed at the top. The water storage tank and the water purification device are connected by detachable pipelines. The inlet of the water purification device is connected to the outlet pipe of the pre-filter via a pipeline, and the outlet of the water purification device is connected to the inlet of the water storage tank or the corresponding water-using equipment via a pipeline. The outlet of the water storage tank is connected to the corresponding water-using equipment via a pipeline.

2. An automatic water storage device with water purification and water-saving functions according to claim 1, characterized in that: The water purification device includes a filter cartridge mounting frame, a PP cotton filter cartridge, an activated carbon filter cartridge, a KDF filter cartridge, an ultrafiltration membrane filter cartridge, and an RO membrane filter cartridge. The filter cartridge mounting frame is installed at the bottom of the post-purification device and has five filter cartridge mounting slots. The PP cotton filter cartridge, activated carbon filter cartridge, KDF filter cartridge, ultrafiltration membrane filter cartridge, and RO membrane filter cartridge are sequentially installed in the five filter cartridge mounting slots of the filter cartridge mounting frame. The filter cartridge mounting frame, along with the PP cotton filter cartridge, activated carbon filter cartridge, KDF filter cartridge, ultrafiltration membrane filter cartridge, and RO membrane filter cartridge, are all detachable installation structures. The inlet of the cotton filter element is connected to the outlet pipe of the pre-filter. The outlet of the PP cotton filter element is connected to the inlet pipe of the activated carbon filter element. The outlet of the activated carbon filter element is connected to the inlet pipe of the KDF filter element. The outlet of the KDF filter element is connected to the inlet pipe of the ultrafiltration membrane filter element. The outlet of the ultrafiltration membrane filter element is connected to the inlet pipe of the RO membrane filter element. The outlet of the RO membrane filter element is connected to the inlet pipe of the water storage tank. The wastewater outlet of the RO membrane filter element is connected to the redundant space pipe at the top of the overflow pipe of the toilet tank through a pipe.

3. An automatic water storage device with water purification and water-saving functions according to claim 2, characterized in that: The water storage tank is composed of several small water storage tanks connected in series / parallel or a single independent water storage tank. The water inlet of the first-stage small water storage tank is connected to the water outlet of the water purification device through a pipe, and the water outlet of the last-stage small water storage tank is connected to the corresponding water-using equipment through a pipe.

4. An automatic water storage device with water purification and water-saving functions according to claim 3, characterized in that: A faucet is installed at the connection area between the side wall and the bottom of the water storage tank. The water storage tank is equipped with a cylindrical two-way venting one-way check valve. If the water storage tank is composed of several small water storage tanks connected in series / parallel, the cylindrical two-way venting one-way check valve is installed on the top of the last small water storage tank. If the water storage tank is an independent water storage tank, the cylindrical two-way venting one-way check valve is installed on the top of the independent water storage tank.

5. An automatic water storage device with water purification and water-saving functions according to claim 3, characterized in that: The pipe connection structures between each component of the pre-processor, each component of the post-processor, and the water-using equipment are all equipped with one-way check valves.

6. An automatic water storage device with water purification and water-saving functions according to claim 3, characterized in that: The pre-installed device, the small water storage tank, and the independent water storage tank are all made of rigid, pressure-resistant material.

7. An automatic water storage device with water purification and water-saving functions according to claim 1, characterized in that: The cylindrical bidirectional venting one-way check valve includes a first cylinder, a second cylinder, a sealing ring, a T-shaped valve core, a spring, and a float. The lower part of the first cylinder is tightly connected to the air pressure balance port. The upper inner wall of the first cylinder has an internal thread structure, and the lower outer wall of the second cylinder has an external thread structure. The lower part of the second cylinder is tightly threaded to the upper part of the first cylinder. The upper part of the second cylinder has an inwardly extending boss with a sealing ring. The bottom of the second cylinder has an inwardly extending limiting block. The second cylinder contains a T-shaped valve core with a circular top surface. The diameter of the T-cap at the top of the T-shaped valve core is smaller than the internal diameter of the second cylinder but larger than the diameter of the inwardly extending boss at the top of the second cylinder. The inner diameter of the T-shaped valve core is as follows: a spring is fitted on the T-handle of the T-shaped valve core, and the two ends of the spring press against the top surface of the limiting block extending inward from the bottom of the second cylinder and the bottom surface of the T-cap of the T-shaped valve core, respectively. The lower part of the T-handle of the T-shaped valve core passes through the through hole of the limiting block in the second cylinder and extends downward into the inner space of the first cylinder. A float is installed and fixed at the bottom end of the T-handle of the T-shaped valve core. The float is suspended in the inner space of the first cylinder. The float is a sealed hollow cylinder. The outer diameter of the float is smaller than the inner diameter of the first cylinder. The outer diameter of the float is larger than the through hole diameter of the limiting block at the bottom of the second cylinder. The height at which the float can be raised and lowered in the first cylinder is greater than the height at which the T-shaped valve core can be raised and lowered in the second cylinder.

8. An automatic water storage device with water purification and water-saving functions according to claim 1, characterized in that: The openings of the pre-treatment device, from bottom to top, are: sludge discharge port, water intake port, water inlet, water outlet, air pressure balance port, and scum discharge port.

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