Direct drinking water circulation system

Abstract

The utility model discloses a direct drinking water circulation system which comprises a first filtering device, terminal water utilization equipment, a water purification pipeline and a water return pipeline, and switching between normal water supply and water return treatment is achieved by arranging a first control valve and a second control valve. During normal water supply, the direct drinking water purified by the first filtering device is conveyed to the terminal water utilization equipment through the water purification pipeline; during backwater treatment, the first control valve is closed, the second control valve is opened, and the direct drinking water is driven by the backwater pump to circulate in the purified water pipeline and the backwater pipeline and is purified again through the second filtering device. In addition, the system is provided with an ultraviolet disinfection device to ensure water quality safety, the pressure tank realizes a pressure stabilizing function, and all parts are reasonably arranged in the cabinet body. The direct drinking water utilization rate is increased, the water quality safety is guaranteed, and the space layout is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of direct drinking water treatment, in particular to a direct drinking water circulation system. BACKGROUND

[0002] In recent years, direct drinking water purification systems have been rapidly developed as a new way of treating drinking water. Tap water is filtered and disinfected through multiple stages, and then delivered to user terminal equipment such as faucets or direct drinking water machines through water purification pipes, greatly improving the convenience and safety of drinking water. This system not only reduces the use of traditional bottled water and reduces environmental pollution, but also provides a more healthy and efficient drinking water solution for homes and offices, and has gradually become an indispensable part of modern life.

[0003] However, when the water-using equipment stops using, the direct drinking water remaining in the water purification pipe will breed bacteria due to long-term non-flowing, and the contaminated water needs to be discharged before use again, which seriously affects the user experience and may endanger health. This problem has not been effectively solved in the prior art, and there is an urgent need for a solution that can achieve regular circulation and purification of direct drinking water in the pipe. SUMMARY

[0004] In order to achieve the purpose of regular circulation and purification of direct drinking water in the pipe, the present application provides a direct drinking water circulation system.

[0005] The direct drinking water circulation system provided by the present application adopts the following technical solution:

[0006] A direct drinking water circulation system comprises:

[0007] A first filtering device for filtering and purifying direct drinking water;

[0008] A terminal water-using equipment for outputting filtered direct drinking water;

[0009] A water purification pipe, wherein the water inlet end of the water purification pipe is in communication with the water outlet end of the first filtering device, the water outlet end of the water purification pipe is in communication with the terminal water-using equipment, and the water inlet end of the water purification pipe is provided with a first control valve;

[0010] A backwater pipe, wherein the water inlet end of the backwater pipe is in communication with the water outlet end of the water purification pipe, and the water outlet end of the backwater pipe is in communication with the water inlet end of the water purification pipe; the water outlet end of the backwater pipe is provided with a second control valve, and the backwater pipe is provided with a second filtering device and a backwater pump;

[0011] When normal water supply, the first control valve is always open, the second control valve is always closed, and the straight drinking water filtered by the first filtering device is input into the terminal water equipment through the water purification pipeline; when backwater treatment, the first control valve is closed, and the second control valve is opened, and the straight drinking water stored in the backwater pipeline and the water purification pipeline is internally circulated under the pumping action of the backwater pump and is filtered and purified through the second filtering device.

[0012] By adopting the above technical scheme, when normal water supply, the first filtering device can effectively filter impurities in the straight drinking water, ensuring that the output water quality is pure. The open first control valve allows the filtered straight drinking water to flow smoothly into the water purification pipeline and eventually reach the terminal water equipment for user use. When backwater treatment is needed, the first control valve is closed and the second control valve is opened, cooperating with the operation of the backwater pump, so that the straight drinking water stored in the water purification pipeline and the backwater pipeline forms an internal circulation. In this process, the second filtering device filters the circulating water flow again, completely removing possible bacteria and impurities, thereby avoiding the pollution problem of the traditional system caused by long-term retention of the static water body, significantly improving the safety and reliability of the water quality. In addition, the design realizes automatic management by precisely controlling the valve state and water pump, reduces manual intervention, and improves the operation efficiency of the system.

[0013] Preferably, a first ultraviolet disinfection device is arranged at the water purification pipeline, and when normal water supply, the first ultraviolet disinfection device performs ultraviolet disinfection on the straight drinking water in the water purification pipeline.

[0014] By adopting the above technical scheme, when normal water supply, the first ultraviolet disinfection device performs ultraviolet disinfection on the straight drinking water in the water purification pipeline, effectively killing bacteria and viruses in the water, improving water quality safety, and ensuring that the straight drinking water used by the user meets the health standard.

[0015] Preferably, the backwater pipeline is provided with a second ultraviolet disinfection device, and when backwater treatment, the first ultraviolet disinfection device and the second ultraviolet disinfection device jointly perform ultraviolet disinfection on the internally circulating straight drinking water in the backwater pipeline and the water purification pipeline.

[0016] By adopting the above technical scheme, the backwater pipeline is provided with a second ultraviolet disinfection device, and when backwater treatment, the first ultraviolet disinfection device and the second ultraviolet disinfection device jointly act on the internally circulating straight drinking water in the backwater pipeline and the water purification pipeline to perform double ultraviolet disinfection. This makes the straight drinking water in the system be able to be subjected to more thorough sterilization during internal circulation, effectively preventing the breeding of bacteria, significantly improving water quality safety, and protecting the health of the user.

[0017] Preferably, a pressure tank for pressure stabilization is arranged at the water purification pipeline.

[0018] By adopting the technical scheme, the pressure tank is arranged on the water purification pipeline, so that the water pressure in the pipeline can be adjusted and stabilized during normal water supply, and the problem of unstable water supply caused by water pressure fluctuation can be avoided, thereby ensuring that the terminal water equipment obtains continuous and stable direct drinking water supply.

[0019] Preferably, the first control valve and the second control valve are both solenoid valves.

[0020] By adopting the technical scheme, the first control valve and the second control valve are both solenoid valves, so that remote automatic control of the valves can be realized. Compared with manual valves, solenoid valves can quickly respond to control system instructions and accurately switch the on-off state of the water purification pipeline and the backwater pipeline, thereby improving the operation efficiency and reliability of the direct drinking water circulation system and reducing errors and delays caused by human operation.

[0021] Preferably, the water inlet end of the backwater pipeline is provided with a check valve.

[0022] By adopting the technical scheme, the check valve can effectively prevent the water in the backwater pipeline from flowing backward in a non-working state, so as to ensure that the water flow direction in the system is always controllable. This not only helps to maintain stable operation of the system, but also avoids water pollution caused by water flow backward, thereby further ensuring the safety and hygiene of the direct drinking water.

[0023] Preferably, the first filter device is a five-stage filter.

[0024] By adopting the technical scheme, the first filter device of the direct drinking water circulation system is a five-stage filter, which can filter and purify the direct drinking water in multiple levels, effectively removing impurities, bacteria and other harmful substances in the water, thereby significantly improving the water quality of the direct drinking water.

[0025] Preferably, the direct drinking water circulation system further comprises a cabinet, a plurality of compartments are arranged in the cabinet, the first filter device is arranged in the bottom compartment, the pressure tank is arranged in the middle compartment, and the first ultraviolet disinfection device, the second ultraviolet disinfection device and the backwater pump are arranged in the upper compartment.

[0026] By adopting the technical scheme, the components in the direct drinking water circulation system are arranged in the cabinet according to the functional requirements, and the modular layout of the system is realized. The first filter device is arranged in the bottom compartment, which facilitates the installation and maintenance of the filter device with large volume and heavy weight, and avoids affecting other components. The pressure tank is arranged in the middle compartment, which not only ensures the normal play of the pressure stabilization function, but also reasonably utilizes the space, avoids the problems of uneven pressure conduction or occupation of too much effective space due to improper position. The first ultraviolet disinfection device, the second ultraviolet disinfection device and the backwater pump are arranged in the upper compartment, which facilitates unified management and maintenance, reduces the complexity of pipeline connection, and improves the stability and reliability of the system. Overall, the space utilization and maintenance convenience of the direct drinking water circulation system are improved, the working environment of each component is optimized, and the efficiency and safety of system operation are ensured.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By setting the opening and closing cooperation of the first control valve and the second control valve, and the synergistic effect of the backwater pump and the second filter device, the internal circulation and re-filtering of direct drinking water in the clean water pipeline and the backwater pipeline during backwater treatment are realized, which effectively avoids the growth of bacteria in the direct drinking water in the pipeline due to long-term retention, and improves the water quality safety;

[0029] 2. The first ultraviolet disinfection device arranged on the clean water pipeline performs ultraviolet disinfection on the direct drinking water during normal water supply, and the second ultraviolet disinfection device arranged on the backwater pipeline cooperates with the first ultraviolet disinfection device to perform double ultraviolet sterilization on the internal circulating direct drinking water during backwater treatment, which ensures more thorough sterilization effect;

[0030] 3. The arrangement of the pressure tank can maintain the stability of the water supply pressure in the clean water pipeline, ensure the smooth delivery of direct drinking water during normal water supply, and provide pressure support for internal circulation during backwater treatment, improving the reliability of system operation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a direct drinking water flow direction schematic diagram of a direct drinking water circulation system in the present application embodiment during normal water supply.

[0032] Figure 2 is a direct drinking water flow direction schematic diagram of a direct drinking water circulation system in the present application embodiment during backwater treatment.

[0033] Figure 3 is a structure schematic diagram of a direct drinking water circulation system in the present application embodiment.

[0034] Explanation of reference signs: 1, first filter device; 2, clean water pipeline; 3, backwater pipeline; 4, terminal water equipment; 5, first ultraviolet disinfection device; 6, second ultraviolet disinfection device; 7, first control valve; 8, second control valve; 9, backwater pump; 10, second filter device; 11, pressure tank; 12, check valve; 13, cabinet; 131, compartment. DETAILED DESCRIPTION

[0035] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 Further detailed description will be made to the present application.

[0036] The embodiment of the present application discloses a direct drinking water circulation system, referring to Figure 1 and Figure 2 , comprising a first filter device 1, terminal water equipment 4, clean water pipeline 2 and backwater pipeline 3. The water inlet end of the first filter device 1 is communicated with a water source (water supply system), and the direct drinking water is output from the water outlet end of the first filter device 1 after being filtered and purified. The water outlet end of the first filter device 1 is communicated with the water inlet end of the clean water pipeline 2, and the water outlet end of the clean water pipeline 2 is communicated with the terminal water equipment 4. In addition, the water inlet end of the clean water pipeline 2 is provided with a first control valve 7, and the first control valve 7 is used for controlling the opening and closing of the clean water pipeline 2.

[0037] The water inlet end of the backwater pipeline 3 is communicated with the water outlet end of the clean water pipeline 2, and the water outlet end of the backwater pipeline 3 is communicated with the water inlet end of the clean water pipeline 2, so that the backwater pipeline 3 and the clean water pipeline 2 form an internal circulation pipeline. The water outlet end of the backwater pipeline 3 is provided with a second control valve 8, and the backwater pipeline 3 is provided with a second filter device 10 and a backwater pump 9.

[0038] In normal water supply, the first control valve 7 is always open, the second control valve 8 is always closed, and the direct drinking water filtered by the first filter device 1 is input into the terminal water equipment 4 through the clean water pipeline 2. In backwater treatment, the first control valve 7 is closed, the second control valve 8 is opened, and the direct drinking water stored in the backwater pipeline 3 and the clean water pipeline 2 is internally circulated under the pumping action of the backwater pump 9, and is filtered and purified through the second filter device 10.

[0039] Specifically, the first filter device 1 comprises a five-stage filter. The five-stage filter can be composed of a PP cotton filter core, a granular activated carbon filter core, a compressed activated carbon filter core, an RO reverse osmosis membrane filter core and a post-activated carbon filter core. The PP cotton filter core is used for intercepting large-particle impurities, the granular activated carbon filter core is used for adsorbing odor and residual chlorine, the compressed activated carbon filter core is used for further removing fine particles, the RO reverse osmosis membrane filter core is used for removing dissolved salts and heavy metal ions, and the post-activated carbon filter core is used for improving taste. These filter cores can be replaced by other types of filter cores, such as ceramic filter cores or ultrafiltration membrane filter cores, and the specific selection is determined according to the actual water quality demand.

[0040] The construction features of the clean water pipeline 2 have good corrosion resistance and sealing performance. The diameter of the clean water pipeline 2 can be set according to the actual flow demand, and is usually between 20 mm and 50 mm. The clean water pipeline 2 is connected in a buckle type, which is convenient for disassembly and maintenance. The first control valve 7 adopts an electromagnetic valve structure, which is internally provided with an electromagnetic coil and a valve core, and the opening and closing state is controlled by an electric signal. The shell of the electromagnetic valve is made of high-temperature resistant engineering plastic, and the valve core is made of corrosion-resistant stainless steel.

[0041] The construction features of the backwater pipeline 3 are similar to those of the clean water pipeline 2. The inlet end of the backwater pipeline 3 is provided with a check valve 12 to prevent reverse flow of water. The check valve 12 adopts a spring type structure, which is composed of a valve body, a valve clack and a spring. The valve body is made of cast iron, the valve clack is made of corrosion-resistant rubber material, and the spring is made of stainless steel to ensure long-term stability.

[0042] The second filter device 10 includes a multi-layer filter screen structure, and the aperture of each layer of filter screen is different and arranged in order from coarse to fine. The filter screen material can be nylon or polyester fiber, which has good filtering performance and durability. The backwater pump 9 adopts a centrifugal pump structure, which is composed of a motor, an impeller and a pump shell. The power of the motor is set according to the actual demand, and is usually between 30 W and 100 W. The impeller is made of corrosion-resistant stainless steel, and the pump shell is made of reinforced plastic material.

[0043] The first ultraviolet disinfection device 5 is arranged at the clean water pipeline 2, and when the water is normally supplied, the first ultraviolet disinfection device 5 performs ultraviolet disinfection on the direct drinking water in the clean water pipeline 2. The second ultraviolet disinfection device 6 is arranged at the backwater pipeline 3, and when the backwater is treated, the first ultraviolet disinfection device 5 and the second ultraviolet disinfection device 6 jointly perform ultraviolet disinfection on the internal circulating direct drinking water in the backwater pipeline 3 and the clean water pipeline 2. The structure of the second ultraviolet disinfection device 6 is the same as that of the first ultraviolet disinfection device 5, and both adopt a pipeline flow type ultraviolet disinfection device.

[0044] The pressure tank 11 for pressure stabilization is also arranged at the clean water pipeline 2. The pressure tank 11 adopts a diaphragm type structure, which is composed of a tank body, a diaphragm and an inflation nozzle. The tank body is made of carbon steel and coated with a corrosion-resistant coating, the diaphragm is made of EPDM rubber material, and the inflation nozzle is used to adjust the gas pressure in the tank. The volume of the pressure tank 11 can be set according to the system size, and is usually between 10 L and 50 L. The pressure tank 11 maintains the water pressure in the system stable, avoids the problem of unstable water pressure caused by fluctuation of water consumption, and thus ensures the normal operation of the entire system.

[0045] In addition, with reference to Figure 3This application also provides a cabinet 13, which has multiple compartments 131. The first filter device 1 is located in the bottom compartment 131, the pressure tank 11 is located in the middle compartment 131, and the first ultraviolet disinfection device 5, the second ultraviolet disinfection device 6, and the return water pump 9 are all located in the upper compartment 131. This layered design makes the layout of each component reasonable, facilitates installation and maintenance, saves space, and improves the overall compactness of the system.

[0046] The implementation principle of this embodiment is as follows:

[0047] Reference Figure 1 During normal water supply, the first control valve 7 is normally open, and the second control valve 8 is normally closed. The booster pump of the water purification system starts, and the drinking water, after passing through the first filter device 1, enters the purified water pipeline 2 through the first control valve 7. The pressure tank 11 acts as a pressure stabilizer. The drinking water flows through the first ultraviolet disinfection device to ensure sterilization and disinfection—further ensuring water quality—and then supplies water to the terminal water-using equipment 4 (faucets or instant hot water dispensers). Throughout the entire process, because the second control valve 8 is normally closed, the water in the return water pipeline 3 does not flow.

[0048] In this embodiment, the normal operation time of the water return is 30 seconds, and the time interval of the water return operation is 4 hours or 6 hours (the specific time interval depends on the actual needs, but the water return frequency will not exceed 8 hours / time).

[0049] Reference Figure 2 When water return is needed, the first control valve 7 closes, preventing drinking water from the first filter device 1 from entering the pipe downstream of the first control valve 7. The second control valve 8 opens, and the return water pump 9 starts, circulating the water in the purified water pipe 2 and the return water pipe 3 in the following flow direction: return water pump 9 → second control valve 8 → first ultraviolet disinfection device 5 → check valve 12 → second filter device 10 → second ultraviolet disinfection device 6 → return water pump 9. When the water flows through the second filter device 10, all the water in the purified water pipe 2 and the return water pipe 3 is filtered again, and it undergoes two ultraviolet disinfection processes when passing through the first ultraviolet disinfection device 5 and the second ultraviolet disinfection device 6, ensuring triple protection for the return water effect. Throughout the entire return water process, as long as the water volume in the pipes and the pump flow rate and pressure are calculated in advance, the water in the entire system can achieve triple-protected internal circulation.

[0050] Reference Figure 1 Once the water return process is complete, the second control valve 8 closes, the return water pump 9 stops working, and the water flow in the entire return water pipeline 3 ceases. Simultaneously, the first control valve 7 reopens, and the entire terminal water dispenser returns to normal water supply status.

[0051] The application realizes the timing backwater function of the direct drinking water system by precisely controlling the opening and closing states of the first control valve 7 and the second control valve 8 and the operation time of the backwater pump 9. This method not only improves the automation degree of the system, but also ensures that the water quality in the pipeline is always in a safe state, providing more reliable drinking water guarantee for users.

[0052] The above are preferred embodiments of the application, which do not limit the protection scope of the application, and thus: any equivalent changes made on the basis of the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A direct drinking water circulation system, characterized in that, The utility model relates to a direct drinking water circulating system, which comprises: a first filtering device (1) for filtering and purifying direct drinking water; a terminal water equipment (4) for outputting filtered direct drinking water; a water purification pipeline (2), wherein the water inlet end of the water purification pipeline (2) is communicated with the water outlet end of the first filtering device (1), the water outlet end of the water purification pipeline (2) is communicated with the terminal water equipment (4), and the water inlet end of the water purification pipeline (2) is provided with a first control valve (7); a backwater pipeline (3), wherein the water inlet end of the backwater pipeline (3) is communicated with the water outlet end of the water purification pipeline (2), the water outlet end of the backwater pipeline (3) is communicated with the water inlet end of the water purification pipeline (2), the water outlet end of the backwater pipeline (3) is provided with a second control valve (8), and the backwater pipeline (3) is provided with a second filtering device (10) and a backwater pump (9); when normal water supply is performed, the first control valve (7) is always opened, the second control valve (8) is always closed, and the direct drinking water filtered by the first filtering device (1) is input into the terminal water equipment (4) through the water purification pipeline (2); when backwater treatment is performed, the first control valve (7) is closed, the second control valve (8) is opened, and the direct drinking water stored in the backwater pipeline (3) and the water purification pipeline (2) is internally circulated under the pumping action of the backwater pump (9) and is filtered and purified through the second filtering device (10).

2. The direct drinking water circulation system of claim 1, wherein: A first ultraviolet disinfection device (5) is arranged at the water purification pipeline (2), and the first ultraviolet disinfection device (5) performs ultraviolet disinfection on the direct drinking water in the water purification pipeline (2) when normal water supply is performed.

3. The direct water drinking recirculation system according to claim 2, characterized in that: The backwater pipeline (3) is provided with a second ultraviolet disinfection device (6), and the first ultraviolet disinfection device (5) and the second ultraviolet disinfection device (6) jointly perform ultraviolet disinfection on the internally circulated direct drinking water in the backwater pipeline (3) and the water purification pipeline (2) when backwater treatment is performed.

4. The direct water drinking recirculation system according to claim 3, characterized in that: A pressure tank (11) for pressure stabilization is arranged at the water purification pipeline (2).

5. The direct water drinking recirculation system according to claim 1, characterized in that: The first control valve (7) and the second control valve (8) are both electromagnetic valves.

6. The direct water drinking recirculation system of claim 1, wherein: A check valve (12) is arranged at the water inlet end of the backwater pipeline (3).

7. The direct water drinking recirculation system of claim 1, wherein: The first filtering device (1) is a five-stage filter.

8. The direct water drinking recirculation system of claim 4, wherein: The direct drinking water circulating system further comprises a cabinet body (13), a plurality of compartments (131) are arranged in the cabinet body (13), the first filtering device (1) is arranged in the bottom compartment (131), the pressure tank (11) is arranged in the middle compartment (131), and the first ultraviolet disinfection device (5), the second ultraviolet disinfection device (6), and the backwater pump (9) are all arranged in the upper compartment (131).

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