A water supply device

Abstract

The utility model relates to a kind of quality water supply equipment, involve quality water supply technical field.The equipment includes raw water pretreatment module, water purification preparation module, water purification supply module and control module.Raw water pretreatment module is stored in raw water tank by ultrafiltration membrane to raw water preliminary filtration;Water purification preparation module supplies the filtered water in raw water tank by raw water pump to user ordinary water point, another road is stored in water purification tank after depth processing by activated carbon tank, precision filter, RO reverse osmosis membrane, with water purification delivery pump and pure water pipeline, water purification is supplied to user water purification point.Control module is according to the liquid level signal of raw water tank and water purification tank, automatically control the start-stop of each water pump and solenoid valve, realize fully automatic operation.The utility model is high in integration, adapts multiple water sources and is applicable to scattered small-scale user, need not complex infrastructure, cost controllable and can realize effective quality water supply.

Description

Technical Field

[0001] This utility model relates to the field of differentiated water supply, specifically a differentiated water supply device. Background Technology

[0002] As residents become more health-conscious, their demand for domestic water is showing a trend towards more refined stratification. For water used for cleaning and washing, ordinary tap water is sufficient; however, water used for cooking, drinking, preparing beverages, ironing, and underfloor heating often requires drinking water with lower hardness and lower ion content.

[0003] Currently, centralized piped drinking water is a common differentiated water supply model, typically employing a "main water supply system + secondary water supply equipment" architecture. This model is suitable for large communities or densely populated residential areas, achieving economies of scale. However, this model also has significant drawbacks: on the one hand, its initial investment costs are high, and it has certain access requirements for raw water quality; on the other hand, this model heavily relies on a well-established tap water supply and secondary water supply infrastructure, making it unsuitable for special scenarios with weak infrastructure.

[0004] However, many regions in my country lack the conditions to deploy such centralized systems. For example, in high-altitude mountainous areas, although mountain springs are abundant, infrastructure is weak and there is a lack of centralized tap water supply systems; in areas with severe soil erosion, such as the Loess Plateau, water resources are scarce, and rainwater harvesting is often relied upon; in ordinary remote mountainous areas or areas with scattered populations, groundwater is commonly used as a water source. These scenarios share the common characteristics of small user scale, dispersed residences, and inadequate infrastructure, making large-scale centralized water supply systems neither economical nor feasible.

[0005] Therefore, the market urgently needs an integrated water supply system that is suitable for small, dispersed households, adaptable to various water sources (such as spring water, well water, and collected rainwater), highly integrated, automatically operated, and easy to maintain, in order to solve the problem of high-quality drinking water demand in remote and scattered areas that cannot be effectively covered by existing technologies. Utility Model Content

[0006] To address the aforementioned issues, this utility model provides a water supply device that is adaptable to multiple water sources, requires no complex infrastructure, has controllable costs, and can achieve differentiated water supply.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a water supply device with different water quality, including a raw water pretreatment module, a purified water production module, a purified water supply module and a control module;

[0008] The raw water pretreatment module includes a water pump, an ultrafiltration membrane, and a raw water tank connected in sequence by pipelines. A water solenoid valve is installed on the water supply pipeline between the water pump and the ultrafiltration membrane. The wastewater outlet of the ultrafiltration membrane is connected to the wastewater discharge main pipe. After the raw water is filtered by the ultrafiltration membrane, ultrafiltration water is obtained and stored in the raw water tank.

[0009] The water purification module includes a raw water pump, an activated carbon tank, a precision filter, a water purification booster pump, and an RO reverse osmosis membrane connected sequentially by pipes. The inlet of the raw water pump is connected to the outlet of the raw water tank, and the outlet of the raw water pump is divided into two paths: one path connects to the user's ordinary water point through an ultrafiltration water pipe, and the other path connects to the inlet of the water purification booster pump after passing through the activated carbon tank and the precision filter. A water purification solenoid valve is installed on the pipe connecting the activated carbon tank and the precision filter. The outlet of the water purification booster pump is connected to the inlet of the RO reverse osmosis membrane. The purified water outlet of the RO reverse osmosis membrane is connected to the purified water tank, and its concentrate outlet is connected to the wastewater discharge main pipe.

[0010] The purified water supply module includes a purified water delivery pump, the inlet of which is connected to the purified water tank, and the outlet of which is connected to the user's purified water point through a purified water pipeline.

[0011] Both the raw water tank and the purified water tank are equipped with level sensors at the bottom, and the sensing end of the level sensors extends into the tank.

[0012] The control module is electrically connected to the incoming water pump, raw water pump, water production booster pump, purified water delivery pump, and each liquid level sensor, and is used to control the start and stop of each pump and solenoid valve according to the liquid level signal.

[0013] Preferably, it also includes multiple pressure detection devices and alarm devices;

[0014] The plurality of pressure detection devices include an electrical contact pressure gauge disposed at the front end of the ultrafiltration membrane, an electrical contact pressure gauge disposed at the upper end of the precision filter, and an electrical contact pressure gauge disposed at the front end of the RO reverse osmosis membrane.

[0015] Each of the pressure detection devices and alarm devices is electrically connected to the control module. When the pressure of any electrical contact pressure gauge exceeds the preset upper limit, the corresponding water pump is controlled to shut down after a delay, and an alarm is issued through the alarm device.

[0016] Preferably, both the water pump and the water solenoid valve are controlled by the upper and lower limits of the raw water tank level sensor. When the liquid level rises to the upper limit, the water pump stops and the water solenoid valve closes. When the liquid level drops to the lower limit, the water pump starts and the water solenoid valve opens. At the same time, the water solenoid valve is controlled by the water level, closing when the level is low and opening when the level is high.

[0017] Both the raw water pump and the water production solenoid valve are controlled by the lower limit of the raw water tank level sensor. When the liquid level drops to the lower limit, the raw water pump stops and the water production solenoid valve closes. When the liquid level is higher than the lower limit, the raw water pump starts and the water production solenoid valve opens.

[0018] The purified water delivery pump is controlled by the lower limit of the purified water tank level sensor. It stops when the liquid level drops to the lower limit and starts when the liquid level is higher than the lower limit.

[0019] The water-making booster pump is controlled by the upper and lower limits of the water tank level sensor. It stops when the water level rises to the upper limit and starts when the water level drops to the lower limit. At the same time, the water-making booster pump is controlled by the pressure gauges of the electrical contacts before the precision filter and the RO reverse osmosis membrane. If either electrical contact pressure gauge is over-pressurized, a delayed shutdown protection is triggered.

[0020] Preferably, the RO reverse osmosis membrane is equipped with a conductivity meter on its purified water outlet pipe, and the conductivity meter is electrically connected to the control module; both the RO reverse osmosis membrane inlet pipe and the wastewater discharge pipe are equipped with diaphragm regulating valves, and the concentrated water discharge rate is 25% and the purified water delivery rate is 75% by adjusting the diaphragm regulating valve on the wastewater discharge pipe.

[0021] Preferably, the water supply equipment is equipped with a sheet metal shell, which is an integral welded structure with a maintenance door. All components of the raw water pretreatment module, the purified water production module, and the purified water supply module adopt a detachable assembly structure.

[0022] Preferably, both the raw water tank and the purified water tank are equipped with breathers at the top, and the cleaning wastewater outlets at the bottom are connected to the main wastewater discharge pipe.

[0023] Preferably, the activated carbon tank achieves backwashing function through its own multi-way valve. The multi-way valve is electrically connected to the control module, and the backwash wastewater flows out to the wastewater discharge main through the drain pipe. The water-making solenoid valve is also controlled by the backwashing state of the activated carbon tank. When the activated carbon tank is backwashed, the water-making solenoid valve is closed.

[0024] Preferably, the water flow pipeline of the water supply equipment is equipped with multiple manual ball valves, and the outlet ends of the raw water pump and the water booster pump are both equipped with check valves.

[0025] Preferably, the raw water tank and the purified water tank are configured to be switchable: when the number of water users is ≤10 people / day and the raw water is spring water, rainwater or well water, the raw water tank is configured with two 90L tanks; when the number of water users is ≤10 people / day and the raw water is tap water, the raw water tank is configured with one 90L tank; the purified water tank is fixedly configured with one 35L tank.

[0026] Preferably, the ultrafiltration membrane is made of PVC of high-quality drinking water and food-grade hygienic material, the activated carbon canister is filled with activated carbon with a particle size ≥5×5×5mm, and the precision filter uses a PP cotton filter element of 1-5μm×20 inches.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. Highly integrated and adaptable, meeting the needs of decentralized scenarios: This utility model, through modular design, highly integrates the three functional units of raw water pretreatment, purified water production, and purified water supply into one independent and complete water supply system. This equipment does not rely on centralized water pipes and secondary water supply facilities, and can directly treat various water sources such as spring water, well water, collected rainwater, and tap water. It perfectly solves the high-quality drinking water needs of remote mountainous areas, areas with weak infrastructure, and decentralized small household users, greatly expanding the application scenarios of differentiated water supply technology.

[0029] 2. Intelligent Control and Fully Automated Operation: By setting up a control module and linking it with various water pumps, solenoid valves, level sensors, and pressure detection devices, the system achieves fully automated control of the entire process from raw water intake, pretreatment, water production to purified water supply. The system intelligently starts and stops the corresponding water pumps based on the liquid levels in the raw water tank and purified water tank, ensuring not only continuous water supply but also effectively preventing pump idling and tank overflow, thus achieving energy conservation and intelligent, stable operation of the equipment.

[0030] 3. Dual Water Supply and Efficient Water Resource Utilization: The equipment splits the raw water pump outlet into two streams. One stream supplies ordinary water treated by an ultrafiltration membrane to meet cleaning and washing needs, while the other stream supplies high-quality direct drinking water that has undergone deep treatment by an activated carbon tank, precision filter, and RO reverse osmosis membrane to meet drinking and cooking needs. This "separate water supply" model achieves on-demand allocation and tiered utilization of water resources, ensuring water quality at key water points while avoiding the waste of energy and filter materials from treating all water into direct drinking water. It is cost-effective and highly economical.

[0031] 4. Flexible configuration and excellent user experience: The equipment offers a switchable configuration of raw water tanks (1 or 2 90L tanks) for different water sources (such as tap water, spring water / well water / rainwater) and number of users. This can minimize the start frequency of the water pump to save energy and extend the equipment life, while ensuring the freshness of the raw water. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the main view of this utility model;

[0034] Figure 3 This is a schematic diagram of the right side view of this utility model;

[0035] Figure 4 This is a schematic diagram of the left side view of this utility model;

[0036] Figure 5 This is a top view schematic diagram of the present invention;

[0037] Figure 6 This is a schematic diagram of the water production process of this utility model. Detailed Implementation

[0038] The following will combine Figure 1-6 The present invention will be described in detail below. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0039] A water supply device with different water quality components includes a raw water pretreatment module, a purified water production module, a purified water supply module, and a control module.

[0040] The raw water pretreatment module includes a water pump, an ultrafiltration membrane 1, and a raw water tank 2 connected in sequence by pipes. A water solenoid valve 13 is installed on the water pipe 24 between the water pump and the ultrafiltration membrane. The wastewater outlet of the ultrafiltration membrane is connected to the wastewater discharge main pipe 4. After the raw water is filtered by the ultrafiltration membrane, the ultrafiltration water is stored in the raw water tank. The number of raw water tanks can be set according to actual needs.

[0041] The water purification module includes a raw water pump 5, an activated carbon tank 3, a precision filter 6, a water purification booster pump 7, and an RO reverse osmosis membrane 8, which are connected in sequence via pipelines. The inlet of the raw water pump is connected to the outlet of the raw water tank, and the outlet of the raw water pump is divided into two paths: one path is connected to the user's ordinary water point 19 through an ultrafiltration water pipeline 22, and the other path is connected to the inlet of the water purification booster pump after passing through the activated carbon tank and the precision filter. A water purification solenoid valve 14 is installed on the pipeline connecting the activated carbon tank and the precision filter. The outlet of the water purification booster pump is connected to the inlet of the RO reverse osmosis membrane. The purified water outlet of the RO reverse osmosis membrane is connected to the purified water tank 9, and its concentrated water outlet is connected to the wastewater discharge main pipe.

[0042] The water purification supply module includes a water purification pump 10 and an ultraviolet sterilizer. The inlet of the water purification pump is connected to the water purification tank, and its outlet is connected to the user's water purification point 20 through a pure water pipeline 23. An ultraviolet sterilizer can also be installed at the outlet according to the actual situation. The output purified water is disinfected by the ultraviolet sterilizer and then delivered to the user's water purification point.

[0043] Both the raw water tank and the purified water tank are equipped with a liquid level sensor 11 at the bottom, and the sensing end of the liquid level sensor extends into the tank.

[0044] The control module is electrically connected to the incoming water pump, raw water pump, water production booster pump, purified water delivery pump, and each liquid level sensor, and is used to control the start and stop of each pump and solenoid valve based on the liquid level signal.

[0045] Furthermore, the water supply system also includes multiple pressure detection devices and alarm devices;

[0046] Multiple pressure detection devices include an electrical contact pressure gauge 12 installed at the front end of the ultrafiltration membrane, an electrical contact pressure gauge installed at the top of the precision filter, and an electrical contact pressure gauge installed at the front end of the RO reverse osmosis membrane.

[0047] Each pressure detection device and alarm device is electrically connected to the control module. When the pressure of any electrical contact pressure gauge exceeds the preset upper limit, the corresponding water pump is controlled to shut down after a delay, and an alarm is issued through the alarm device.

[0048] A conductivity meter 15 is installed on the purified water outlet pipe of the RO reverse osmosis membrane. The conductivity meter is electrically connected to the control module. When the conductivity is too high, an alarm is triggered and water production is stopped. Manual reset is required to resume production, which will eventually lead to water shortage and supply stoppage in the purified water tank. Diaphragm regulating valves 21 are installed on both the inlet pipe and the wastewater discharge pipe of the RO reverse osmosis membrane. In this application, the diaphragm regulating valve is manual, and the concentrated water discharge rate is 25% and the purified water delivery rate is 75% by adjusting the diaphragm regulating valve on the wastewater discharge pipe.

[0049] The water supply pipeline of the water supply equipment is equipped with multiple manual ball valves 17. The flow rate of the fluid in the pipeline can be controlled by manually adjusting the manual ball valves. At the same time, both the raw water pump and the water booster pump are equipped with check valves 18 at their outlets.

[0050] Both the raw water tank and the clean water tank are equipped with a breather 16 at the top to ensure the cleanliness of the air entering the tank. The cleaning wastewater outlets at the bottom are connected to the main wastewater discharge pipe.

[0051] The activated carbon tank uses its own multi-way valve 25 to control the backwashing function of the activated carbon tank. The multi-way valve is electrically connected to the control module. The control module can set the specific flushing time for timed flushing, and the backwash wastewater flows out to the wastewater discharge main through the drain pipe. The water production solenoid valve is also controlled by the backwashing state of the activated carbon tank. When the activated carbon tank is backwashed, the water production solenoid valve is closed.

[0052] The water supply equipment is equipped with a sheet metal shell, which is an integral welded structure with a maintenance door. All components of the raw water pretreatment module, the purified water production module, and the purified water supply module adopt a detachable assembly structure, which facilitates maintenance and replacement of damaged parts.

[0053] The raw water pump, water booster pump, and purified water delivery pump are all started by either industrial frequency or variable frequency. In a specific embodiment, the incoming water pump uses 220V / Q2m. 3 The H60m self-starting and stopping silent pump, the raw water pump uses 220V / Q2m 3 The / H60m self-starting and stopping silent pump, and the water booster pump adopt 220V / Q2m 3 The / H98m self-starting and stopping silent pump, the water purification transfer pump adopts 220V / Q0.5m 3 The system features a self-starting and stopping silent pump with a capacity of 12m; the ultrafiltration membrane is made of PVC, a high-quality drinking water and food-grade material; the activated carbon canister is filled with activated carbon particles ≥5×5×5mm; and the precision filter uses a 1-5μm×20-inch PP cotton filter element.

[0054] In a specific embodiment, the raw water tank is configured as a 90L tank and the purified water tank is configured as a 35L tank. When the number of water users is ≤10 people / day and the raw water is spring water, rainwater or well water, the raw water tank is 90L x 2 and the purified water tank is 35L x 1 to minimize the start frequency of the incoming water pump. When the number of water users is ≤10 people / day and the raw water is tap water, the raw water tank is 90L x 1 and the purified water tank is 35L x 1 to maximize the freshness of the raw water.

[0055] In the specific implementation process, both the incoming water pump and the incoming water solenoid valve are controlled by the upper and lower limits of the raw water tank level sensor. When the raw water tank level rises to the upper limit, the incoming water pump stops and the incoming water solenoid valve closes. When the level drops to the lower limit, the incoming water pump starts and the incoming water solenoid valve opens. The incoming water enters the ultrafiltration membrane for filtration and then enters the raw water tank. At the same time, the incoming water solenoid valve is controlled by the incoming water level, closing when low and opening when high. When the incoming water pump is running, if the pressure gauge of the electric contact at the front end of the ultrafiltration membrane exceeds the upper limit, it is considered that the ultrafiltration membrane is blocked. The equipment display screen continuously displays the membrane replacement prompt and continuously alarms. The incoming water pump stops after a delay (30 seconds).

[0056] Both the raw water pump and the water-making solenoid valve are controlled by the lower limit of the raw water tank level sensor. When the raw water tank level drops to the lower limit, the raw water pump stops and the water-making solenoid valve closes. When the raw water tank level is higher than the lower limit, the raw water pump starts and the water-making solenoid valve opens. The filtered water produced after the raw water is filtered through the ultrafiltration membrane is supplied by the raw water pump in two constant pressure paths. One path is supplied to the user's floor for washing water, and the other path is further filtered through the activated carbon tank and precision filter in the water purification module and supplied to the water-making booster pump. When the water-making booster pump is running, if the pressure gauge on the upper electrical contact of the precision filter exceeds the upper limit, it is considered that the precision filter is blocked. The equipment display screen continuously displays a PP cotton replacement prompt and continuously alarms. The water-making booster pump stops after a delay (30 seconds).

[0057] The water booster pump directly supplies the further filtered water to the RO reverse osmosis membrane. The RO reverse osmosis membrane filters 75% of the purified water, which is then stored in the purified water tank, while the remaining 25% of the concentrated water is discharged into the wastewater main. The water booster pump is controlled by the upper and lower limits of the purified water tank level sensor, and the factory-set difference between the upper and lower limits of the purified water tank is 300mm. The pump stops when the water level in the purified water tank reaches the upper limit and starts when the level drops to the lower limit. At the same time, the water booster pump is controlled by the pressure gauges at the electrical contacts before the precision filter and before the RO reverse osmosis membrane. If either of the electrical contact pressure gauges exceeds the pressure, a delayed shutdown protection is triggered.

[0058] The purified water delivery pump is controlled by the lower limit of the purified water tank level sensor. When the purified water tank level drops to the lower limit, the purified water delivery pump stops. When the purified water tank level is higher than the lower limit, the purified water delivery pump starts and outputs purified water for users. Alternatively, the purified water can be disinfected by an ultraviolet sterilizer before being output for users. The ultraviolet sterilizer starts and stops synchronously with the purified water delivery pump.

[0059] Additionally, the system features low and high level overflow alarms for the raw water tank. After a low level alarm, check if the incoming water solenoid valve is malfunctioning and unable to open, or if the incoming water pump is damaged, or if there are issues with the incoming water pipeline causing the water outage. After troubleshooting these issues, manually reset the fault or wait for the water level to rise; the system will automatically resume operation. If none of these are the case, check if the level sensor is broken or damaged, causing a false alarm. If an overflow alarm occurs, check if the incoming water solenoid valve is stuck and unable to close; manually close the incoming water solenoid valve immediately to prevent flooding.

[0060] It also features low and high level overflow alarms for the purified water tank. After a low level alarm, it's necessary to check if the water booster pump is frequently shutting down for protection, leading to insufficient water production. Consider replacing the precision filter cartridge or RO reverse osmosis membrane to restore production. Sometimes, improper adjustment of the concentrate to permeate ratio can also cause insufficient permeate and a low level alarm. If membrane issues are ruled out, check if excessive water usage or a burst pipe leak is causing insufficient water supply. If neither of these is the case, check if a false alarm is caused by a broken or damaged level sensor. If an overflow alarm occurs, check if the pretreatment water solenoid valve is stuck and unable to close (this indicates the raw water pump is continuously flooding, causing the level to be too high).

[0061] The pure water production process of this equipment is as follows: Figure 6 As shown in the diagram, the arrows indicate the direction of water flow, and the same icon represents the same accessory.

[0062] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A water supply device with different water qualities, characterized in that: It includes a raw water pretreatment module, a purified water production module, a purified water supply module, and a control module; The raw water pretreatment module includes a water pump, an ultrafiltration membrane (1), and a raw water tank (2) connected in sequence by pipes. A water solenoid valve (13) is provided on the water supply pipe (24) between the water pump and the ultrafiltration membrane. The wastewater outlet of the ultrafiltration membrane is connected to the wastewater discharge main pipe (4). After the raw water is filtered by the ultrafiltration membrane, ultrafiltration water is obtained and stored in the raw water tank. The water purification module includes a raw water pump (5), an activated carbon tank (3), a precision filter (6), a water booster pump (7), and an RO reverse osmosis membrane (8) connected in sequence by pipes. The inlet of the raw water pump is connected to the outlet of the raw water tank, and the outlet of the raw water pump is divided into two paths. One path is connected to the user's ordinary water point (19) through an ultrafiltration water pipe (22), and the other path is connected to the inlet of the water booster pump after passing through the activated carbon tank and the precision filter. A water-making solenoid valve (14) is provided on the pipe connecting the activated carbon tank and the precision filter. The outlet of the water booster pump is connected to the inlet of the RO reverse osmosis membrane. The purified water outlet of the RO reverse osmosis membrane is connected to the purified water tank (9), and its concentrated water outlet is connected to the wastewater discharge main pipe. The water supply module includes a water delivery pump (10), the inlet of which is connected to the water tank, and the outlet is connected to the user's water purification point (20) through a pure water pipe (23). Both the raw water tank and the purified water tank are equipped with a liquid level sensor (11) at the bottom, and the sensing end of the liquid level sensor extends into the tank. The control module is electrically connected to the incoming water pump, raw water pump, water production booster pump, purified water delivery pump, and each liquid level sensor.

2. The water supply equipment according to claim 1, characterized in that: It also includes multiple pressure detection devices and alarm devices; The plurality of pressure detection devices include an electrical contact pressure gauge (12) disposed at the front end of the ultrafiltration membrane, an electrical contact pressure gauge disposed at the upper end of the precision filter, and an electrical contact pressure gauge disposed at the front end of the RO reverse osmosis membrane. Each of the pressure detection devices and alarm devices is electrically connected to the control module. When the pressure of any electrical contact pressure gauge exceeds the preset upper limit, the corresponding water pump is controlled to shut down after a delay, and an alarm is issued through the alarm device.

3. The water supply equipment according to claim 2, characterized in that: Both the incoming water pump and the incoming water solenoid valve are controlled by the upper and lower limits of the raw water tank level sensor. When the liquid level rises to the upper limit, the incoming water pump stops and the incoming water solenoid valve closes. When the liquid level drops to the lower limit, the incoming water pump starts and the incoming water solenoid valve opens. At the same time, the incoming water solenoid valve is controlled by the incoming water level, closing when the level is low and opening when the level is high. Both the raw water pump and the water production solenoid valve are controlled by the lower limit of the raw water tank level sensor. When the liquid level drops to the lower limit, the raw water pump stops and the water production solenoid valve closes. When the liquid level is higher than the lower limit, the raw water pump starts and the water production solenoid valve opens. The purified water delivery pump is controlled by the lower limit of the purified water tank level sensor. It stops when the liquid level drops to the lower limit and starts when the liquid level is higher than the lower limit. The water-making booster pump is controlled by the upper and lower limits of the water tank level sensor. It stops when the water level rises to the upper limit and starts when the water level drops to the lower limit. At the same time, the water-making booster pump is controlled by the pressure gauges of the electrical contacts before the precision filter and the RO reverse osmosis membrane. If either electrical contact pressure gauge is over-pressurized, a delayed shutdown protection is triggered.

4. The water supply equipment according to claim 1, characterized in that: The RO reverse osmosis membrane is equipped with a conductivity meter (15) on its purified water outlet pipe, and the conductivity meter is electrically connected to the control module. The RO reverse osmosis membrane is equipped with a diaphragm regulating valve (21) on both its inlet pipe and wastewater discharge pipe. The diaphragm regulating valve on the wastewater discharge pipe is adjusted to make the concentrated water discharge rate 25% and the purified water delivery rate 75%.

5. The water supply equipment according to claim 1, characterized in that: The water supply equipment is equipped with a sheet metal shell, which is an integral welded structure with a reserved maintenance door. All components of the raw water pretreatment module, the purified water production module, and the purified water supply module adopt a detachable assembly structure.

6. The water supply equipment according to claim 1, characterized in that: Both the raw water tank and the clean water tank are equipped with breathers (16) on the top, and the cleaning wastewater outlets at the bottom are connected to the wastewater discharge main pipe.

7. The water supply equipment according to claim 1, characterized in that: The activated carbon tank achieves backwashing function through its own multi-way valve (25). The multi-way valve is electrically connected to the control module and the backwash wastewater flows out to the wastewater discharge main through the sewage pipe. The water-making solenoid valve is also controlled by the backwashing state of the activated carbon tank. When the activated carbon tank is backwashed, the water-making solenoid valve is closed.

8. The water supply equipment according to claim 1, characterized in that: The water flow pipeline of the water supply equipment is equipped with multiple manual ball valves (17), and the outlet of the raw water pump and the water booster pump are both equipped with check valves (18).

9. The water supply equipment according to claim 1, characterized in that: The raw water tank and the purified water tank are configured interchangeably: when the number of water users is ≤10 people / day and the raw water is spring water, rainwater or well water, the raw water tank is configured with two 90L tanks; when the number of water users is ≤10 people / day and the raw water is tap water, the raw water tank is configured with one 90L tank; the purified water tank is fixedly configured with one 35L tank.

10. The water supply equipment according to claim 1, characterized in that: The ultrafiltration membrane is made of PVC, a food-grade material for drinking water. The activated carbon canister is filled with activated carbon with a particle size of ≥5×5×5mm. The precision filter uses a PP cotton filter element with a diameter of 1-5μm×20 inches.

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