Water supply system and control method thereof

Abstract

The invention discloses a water supply system and a control method thereof, the water supply system comprises a control unit and a pressure stabilizing unit, and the control unit comprises a water supply pump, a pressure detection piece and a first control module; wherein the pressure detection piece detects a water supply pressure value; the first control module is in communication connection with the pressure detection piece and the water supply pump so as to generate start-stop actions of the water supply pump according to the water supply pressure value; the pressure stabilizing unit comprises a gas collecting piece, a pressure stabilizing valve and a second control module; wherein the gas collecting piece collects and stores gas in supplied water; the pressure stabilizing valve is connected with the gas collecting piece to control pressure stabilization; the second control module is in communication connection with the pressure stabilizing valve to control opening and closing of the pressure stabilizing valve; wherein the first control module is in communication connection with the second control module, and the second control module is suitable for generating opening and closing actions of the pressure stabilizing valve according to the starting and stopping frequency of the water supply pump. Pressure stabilizing control is achieved through linkage of the control unit and the pressure stabilizing unit, the gas compression ratio can be dynamically controlled, the water pressure is stabilized, and the stability and safety of operation of the water supply system are improved.

Description

Technical Field

[0001] This invention relates to the field of water supply technology, and in particular to a water supply system and its control method. Background Technology

[0002] In secondary water supply systems for domestic drinking water, variable frequency pumps start and stop according to changes in water supply pressure. Their start / stop signals typically come from a set value set by a pressure sensor downstream of the pump. This means that by detecting changes in the pipeline pressure, the system directly controls the pump motor's energization and de-energization when the pressure reaches the set value. However, due to fluctuations in water pressure within the supply system, variable frequency pumps experience frequent start-stop cycles, which can easily lead to pump damage and affect the normal, safe, and stable operation of the water supply system.

[0003] In related technologies, to avoid frequent start-stop of water pumps, pressure tanks are often used as pressure stabilizing devices in water supply systems to stabilize water supply pressure and reduce pressure fluctuations. The principle is that the pressure tank has a rubber diaphragm inside its structural tank body. Gas is pre-filled between the diaphragm and the tank wall, and the compression and expansion of the gas absorbs and compensates for pressure fluctuations, stabilizing the pressure of the pipeline system. The pre-filled gas pressure inside the pressure tank is a constant value; if leakage occurs, air is replenished and pressurized using an air compressor through the pressure tank's air inlet. In practical applications, pressure tank stabilization presents the following problems: First, in high-pressure water supply zones, water pumps frequently start and stop or operate for extended periods, limiting the pressure tank's high-pressure stabilization capacity; second, pressure tank maintenance is limited by the need for air compressor replenishment in case of pressure leakage, which pump stations often lack; third, the aging and oxidation resistance of the pressure tank's rubber diaphragm pose a risk of secondary pollution. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a water supply system and its control method, aiming to solve the problems of limited pressure stabilization capacity and insufficient safety in existing water supply systems.

[0005] This invention proposes a water supply system, comprising a control unit and a pressure stabilizing unit. The control unit includes a water supply pump, a pressure detection device, and a first control module. The water supply pump and pressure detection device are located in the water supply pipeline, with the pressure detection device positioned downstream of the water supply pump to detect the water supply pressure value in the pipeline. The first control module is communicatively connected to the pressure detection device and the water supply pump, and is adapted to generate start-stop actions for the water supply pump based on the water supply pressure value. The pressure stabilizing unit includes an air collector, a pressure stabilizing valve, and a second control module. The air collector is located in the water supply pipeline and downstream of the control unit, and is adapted to collect and store gas in the water supply. The pressure stabilizing valve is connected to the air collector to control the air compression ratio of the air collector. The second control module is communicatively connected to the pressure stabilizing valve to control its opening and closing. The first control module is communicatively connected to the second control module, and the second control module is adapted to generate the opening and closing actions of the pressure stabilizing valve based on the start-stop frequency of the water supply pump.

[0006] According to the water supply system of the present invention, a temporary pressure stabilizing structure can be selectively constructed using a gas collector with controllable gas compression ratio. When the water supply pump experiences frequent start-stop problems due to water pressure fluctuations, this pressure stabilizing structure can utilize the compressibility of gas pressure to achieve a pressure stabilizing effect, thereby reducing the start-stop frequency of the water supply pump. Simultaneously, the combination of the gas collector and the pressure stabilizing valve can stabilize the water supply system pressure, avoiding problems such as water hammer and air resistance. The present invention achieves pressure stabilization control through the linkage of the control unit and the pressure stabilizing unit. On the one hand, it can control the gas compression ratio and stabilize the water pressure, avoiding frequent start-stops of the water supply pump, thereby improving the stability and safety of the water supply system. On the other hand, it eliminates the application of traditional pressure tanks, thus avoiding the maintenance and contamination problems associated with pressure tank diaphragms and eliminating the risk of contamination. Furthermore, it directly utilizes the gas to be discharged from the water supply system for pressure stabilization and regulation, eliminating the need for a separate gas replenishment device, effectively reducing costs and improving the system's economy, reliability, and regulation efficiency.

[0007] According to some embodiments of the present invention, the first control module presets the start pressure value and stop pressure value of the water supply pump; and the first control module is adapted to acquire the water supply pressure value and compare the water supply pressure value with the start pressure value and the stop pressure value, so as to control the water supply pump to start or stop.

[0008] According to some embodiments of the present invention, the first control module presets a monitoring period and is adapted to record the number of times the water supply pump starts and stops within the monitoring period in order to calculate the start-stop frequency of the water supply pump.

[0009] According to some embodiments of the present invention, a first control module or a second control module presets a start-stop frequency limit and compares the start-stop frequency with the start-stop frequency limit; when the start-stop frequency is greater than or equal to the start-stop frequency limit, the second control module controls the pressure regulating valve to close.

[0010] According to some embodiments of the present invention, the pressure stabilizing unit further includes a sensing module, which is disposed in the gas collecting component and / or water supply pipeline to detect the liquid level data in the gas collecting component; the sensing module is communicatively connected to the second control module; when the start-stop frequency is less than the start-stop frequency limit, the second control module is adapted to control the opening and closing of the pressure stabilizing valve according to the liquid level data.

[0011] According to some embodiments of the present invention, the sensing module includes at least three sensors, all of which are disposed in the gas collecting component and are arranged at intervals from low to high along the height direction; all sensors are communicatively connected to the control module, and the sensors are in a first state when they are in contact with water and in a second state when they are out of water; wherein, the sensor at the lowest position is configured as the basic sensor, and the other multiple sensors are configured as liquid level sensors; the second control module is adapted to generate the opening and closing action of the pressure regulating valve based on the state changes of the basic sensor and any one of the liquid level sensors.

[0012] According to some embodiments of the present invention, the sensing module further includes a protection sensor disposed in the water supply pipeline; the protection sensor is communicatively connected to the second control module, the protection sensor is in a first state when it encounters water, and in a second state when it leaves the water; the second control module is adapted to generate the opening and closing action of the pressure regulating valve based on the state changes of the protection sensor and any one of the liquid level sensors.

[0013] According to some embodiments of the present invention, the second control module preferentially receives and processes the status signals of the base sensor and the liquid level sensor; when the base sensor fails, the second control module receives and processes the status signals of the protection sensor and the liquid level sensor.

[0014] According to some embodiments of the present invention, the gas collecting device is disposed on the upper side of the water supply pipeline, and the protection sensor is disposed at the bottom of the water supply pipeline.

[0015] The present invention also proposes a control method for the above-mentioned water supply system, the control method comprising the following steps: Determine whether the pressure regulating valve needs to be closed based on the start-stop frequency of the water supply pump: If the start-stop frequency of the water supply pump is greater than or equal to the start-stop frequency limit, the pressure regulating valve will be closed. If the start-stop frequency of the water supply pump is less than the start-stop frequency limit, the opening and closing of the pressure regulating valve is determined based on the liquid level data in the gas collecting unit.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a water supply system according to some embodiments of the present invention; Figure 2 This is a schematic diagram of the structure of a voltage regulator unit according to some embodiments of the present invention.

[0018] Figure label: Water supply pump 1; pressure detection device 2; first control module 3; pressure stabilizing unit 4; gas collection device 41; exhaust pipe 42; pressure stabilizing valve 43; basic sensor 44; low liquid level sensor 45; high liquid level sensor 46; protection sensor 47; second control module 48; water supply pipe 5. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is for reference. Figures 1-2 A water supply system according to an embodiment of the present invention is described.

[0021] This invention proposes a water supply system, which includes a control unit and a pressure stabilizing unit 4. The control unit includes a water supply pump 1, a pressure detection element 2, and a first control module 3. The water supply pump 1 and the pressure detection element 2 are installed in a water supply pipeline 5, with the pressure detection element 2 positioned downstream of the water supply pump 1 to detect the water supply pressure in the pipeline 5. The first control module 3 is communicatively connected to the pressure detection element 2 and the water supply pump 1 to generate start / stop actions for the water supply pump 1 based on the water supply pressure value. The pressure stabilizing unit 4 includes an air collector 41 and a pressure stabilizing valve 43. The first control module 3 is connected to the second control module 48. A gas collecting element 41 is disposed on the water supply pipeline 5 and after the control unit. The gas collecting element 41 is adapted to collect and store gas in the water supply. A pressure regulating valve 43 is connected to the gas collecting element 41 to control the gas compression ratio inside the gas collecting element 41. The second control module 48 is communicatively connected to the pressure regulating valve 43 to control the opening and closing of the pressure regulating valve 43. The second control module 48 is communicatively connected to the first control module 3 and is adapted to generate the opening and closing action of the pressure regulating valve 43 according to the start and stop frequency of the water supply pump 1.

[0022] According to the water supply system of the present invention, the pressure detection element 2 is adapted to detect the water supply pressure in the water supply pipeline 5, and the first control module 3 generates the start and stop actions of the water supply pump 1 based on the water supply pressure value to regulate the water pressure. When the water supply pressure fluctuates, if the water pressure is too high, the water supply pump 1 is controlled to stop supplying water to reduce the water pressure; if the water pressure is insufficient, the water supply pump 1 is controlled to start to increase the water supply pressure. With fluctuations in the water supply system pressure, the water supply pump 1 experiences frequent start and stop. The gas collector 41 and the pressure regulating valve 43 are installed in the water supply pipeline 5 to collect gas in the water supply pipeline 5 and control its discharge. When the gas collector 41 stores a certain amount of gas, the compression and expansion characteristics of the gas can be used to buffer pressure fluctuations and achieve a pressure stabilizing effect; at this time, the gas collector 41 becomes a pressure stabilizing device. Specifically, when the water pressure in the water supply system increases, the gas in the gas collecting component 41 is compressed, increasing the volume of water entering the gas collecting component 41 and slowing down the rise in water pressure. When the water pressure decreases, the gas in the gas collecting component 41 expands, causing the water entering the gas collecting component 41 to return to the water supply pipeline 5, thus slowing down the drop in water pressure. Utilizing this gas collecting and pressure stabilizing principle, the first control module 3 and the second control module 48 are communicatively connected. The first control module 3 can send the start and stop data of the water supply pump 1 to the second control module 48. The second control module 48 can control the pressure stabilizing valve 43 to open or close when the water supply pump 1 starts and stops frequently, thereby adjusting the gas storage inside the gas collecting component 41. By utilizing the pressure stabilizing effect of the gas collecting component 41, the start and stop frequency of the water supply pump 1 is reduced, improving the stability and safety of the water supply system operation.

[0023] According to the water supply system of the present invention, a temporary pressure stabilizing device can be selectively constructed using a gas collecting component 41 with controllable gas compression ratio. When the water supply pump 1 experiences frequent start-stop problems due to water pressure fluctuations, the pressure stabilizing device can utilize the compressibility of gas pressure to achieve a pressure stabilizing effect, thereby reducing the start-stop frequency of the water supply pump 1. Simultaneously, the combination of the gas collecting component 41 and the pressure stabilizing valve 43 can adjust the amount of stabilizing gas stored, thereby achieving pressure regulation. The present invention achieves pressure stabilization control through the linkage of the control unit and the pressure stabilizing unit 4. On the one hand, it can control the gas compression ratio and stabilize the water pressure, avoiding frequent start-stops of the water supply pump 1, thereby improving the stability and safety of the water supply system. On the other hand, it eliminates the application of traditional pressure tanks, thus avoiding the maintenance and contamination problems associated with pressure tank diaphragms and eliminating the risk of contamination. Furthermore, it directly utilizes the gas to be discharged from the water supply system for pressure stabilization, eliminating the need for a separate gas replenishment device, effectively reducing costs and improving the system's economy, reliability, and control efficiency.

[0024] In some embodiments, the pressure detection element 2 is a pressure gauge, and the first control module 3 and the second control module 48 are configured as PLC modules.

[0025] According to some embodiments of the present invention, the first control module 3 presets the start pressure value and stop pressure value of the water supply pump 1; and the first control module 3 is adapted to acquire the water supply pressure value and compare the water supply pressure value with the start pressure value and the stop pressure value, so as to control the water supply pump 1 to start or stop. In this embodiment, the first control module 3 presets the start pressure and stop pressure values ​​of the water supply pump 1. The first control module 3 acquires the water supply pressure value detected by the pressure detection element 2 and compares it with the start pressure and stop pressure values. When the water supply pressure value detected by the pressure detection element 2 is greater than or equal to the start pressure value, the first control module 3 generates a stop action signal for the water supply pump 1 and sends it to the water supply pump 1. After receiving the signal, the water supply pump 1 executes the stop water supply action. When the water supply pressure value detected by the pressure detection element 2 is less than or equal to the stop pressure value, the first control module 3 generates a start action signal for the water supply pump 1 and sends it to the water supply pump 1. After receiving the signal, the water supply pump 1 executes the start water supply action. When the water supply pressure value detected by the pressure detection element 2 is less than the start pressure value but greater than the stop pressure value, the first control module 3 does not generate a control signal, and the water supply pump 1 maintains its original state. This embodiment achieves precise control of the water supply pump 1 by comparing water pressure.

[0026] In some embodiments, the difference between the start-up pressure and the stop-down pressure is greater than 0.05 MPa, which can avoid frequent start-ups and shutdowns and help maintain system stability.

[0027] Furthermore, in some embodiments, the first control module 3 presets a standard pressure value. By comparing the water supply pressure value with the standard pressure value, it can generate a flow regulation action for the water supply pump 1. Specifically, when the water supply pressure value is greater than the standard pressure value, a signal to reduce the flow of the water supply pump 1 is generated, controlling the output flow of the water supply pump 1 to decrease, thereby lowering the water pressure; when the water supply pressure value is less than the standard pressure value, a signal to increase the flow of the water supply pump 1 is generated, controlling the output flow of the water supply pump 1 to increase, thereby raising the water pressure. This embodiment can maintain the water supply pressure at the standard pressure value, thereby achieving a certain pressure stabilization effect.

[0028] According to some embodiments of the present invention, the first control module 3 presets a monitoring period and is adapted to record the number of times the water supply pump 1 starts and stops within the monitoring period to calculate the start-stop frequency of the water supply pump 1. In this embodiment, the first control module 3 presets a monitoring period to obtain the start-stop frequency data of the water supply pump 1 within the monitoring period, and transmits the start-stop frequency data of the water supply pump 1 to the second control module 48. By presetting the monitoring period, this embodiment can efficiently and accurately obtain the start-stop data of the water supply pump 1 within a reasonable time interval, thereby helping the second control module 48 to generate the opening and closing action signal of the pressure regulating valve 43 according to the start-stop frequency of the water supply pump 1, and efficiently and accurately achieve pressure regulation.

[0029] In some embodiments, the monitoring period is set to ten minutes, which can match the dynamic characteristics of water supply and capture multiple start-stop changes of water supply pump 1. At the same time, it avoids blurring short-term fluctuation information due to an excessively long period and avoids failing to cover start-stop changes due to an excessively short period.

[0030] According to some embodiments of the present invention, the first control module 3 or the second control module 48 presets a start-stop frequency limit and compares the start-stop frequency with the start-stop frequency limit; when the start-stop frequency is greater than or equal to the start-stop frequency limit, the second control module 48 controls the pressure regulating valve to close. In this embodiment, the first control module 3 or the second control module 48 presets a start-stop frequency limit, and determines whether the pressure regulating valve 43 is closed by comparing the start-stop frequency limit with the start-stop frequency value obtained within the monitoring period; when the start-stop frequency value is greater than or equal to the start-stop frequency limit, the water pressure in the water supply pipeline 5 fluctuates violently. At this time, the second control module 48 generates a pressure regulating valve 43 closing signal and transmits it to the pressure regulating valve 43. The pressure regulating valve 43 performs a closing action or maintains a closed state without opening, thereby retaining some gas in the gas collecting component 41 to achieve a pressure stabilizing effect by utilizing the compressibility of the gas. When the start-stop frequency value is less than the start-stop frequency limit, the water supply pump 1 starts and stops normally to regulate the water pressure. At this time, the second control module 48 will not generate a control signal for the pressure regulating valve 43 based on the start-stop frequency of the water supply pump 1, and the pressure regulating valve 43 remains unchanged. Alternatively, the first control module 3 can send the start-stop frequency value to the second control module 48, which will then compare the values ​​and generate a control signal for the pressure regulating valve 43; or the first control module 3 can obtain the start-stop frequency value, compare it, generate a comparison conclusion signal, and send the comparison conclusion signal to the second control module 48, which will then generate the control signal for the pressure regulating valve 43 based on the comparison conclusion.

[0031] In some embodiments, the pressure regulating valve 43 is a solenoid valve or an electric valve, connected to the second control module 48 via a control line. The top of the gas collecting component 41 is connected to the exhaust pipe 42, and the pressure regulating valve 43 is disposed in the exhaust pipe 42 to control the opening and closing of the exhaust pipe 42. The diameter of the exhaust pipe 42 is 8mm-15mm. The height of the gas collecting component 41 is 100mm-300mm, and the diameter is 50mm-100mm. The dimensions of the exhaust pipe 42 and the gas collecting component 41 are determined according to the requirements of the water supply system for the gas compression ratio.

[0032] According to some embodiments of the present invention, the pressure stabilizing unit 4 further includes a sensing module, which is disposed in the gas collecting component 41 and / or the water supply pipeline 5, and is adapted to detect the liquid level data in the gas collecting component 41; the sensing module is communicatively connected to the second control module 48; when the start-stop frequency is less than the start-stop frequency limit, the second control module 48 is adapted to control the opening and closing of the pressure stabilizing valve 43 according to the liquid level data. In this embodiment, the detection of the liquid level data in the gas collecting component 41 is achieved by setting the sensing module, and the gas collection and storage status in the gas collecting component 41 can be known by acquiring the liquid level data; in order to maintain the safe and stable operation of the water supply system, the gas compression ratio in the water supply system needs to be adjusted in a timely manner, so the gas stored in the gas collecting component 41 needs to be maintained at a certain volume. The second control module 48 is communicatively connected to the sensing module, and can acquire the liquid level data in the gas collecting component 41 in real time, so that under the normal start-stop operation of the water supply pump 1 to regulate the water pressure, the gas compression ratio in the gas collecting component 41 can be regulated by controlling the opening and closing of the pressure stabilizing valve 43 to keep it within a suitable range, so as to maintain the safe and stable operation of the water supply system. This embodiment can achieve efficient and accurate air compression ratio control of the water supply system, while also taking into account the pressure regulation effect of the air collecting component 41, further improving the safety and stability of the water supply system operation.

[0033] like Figure 2 As shown, according to some embodiments of the present invention, the sensing module includes at least three sensors, all of which are disposed in the gas collecting component 41 and are arranged at intervals from low to high along the height direction; all sensors are communicatively connected to the control module, and the sensors are in a first state when they are in contact with water and in a second state when they are out of water; wherein, the sensor at the lowest position is configured as the base sensor 44, and the other multiple sensors are configured as liquid level sensors; the second control module 48 is adapted to generate the opening and closing action of the pressure regulating valve 43 based on the state changes of the base sensor 44 and any one of the liquid level sensors. In this embodiment, multiple sensors are used to detect changes in the water level in the gas collecting component 41. Wherein, the sensor is in the first state when it is in contact with water, that is, wet or conductive state; the sensor is in the second state when it is out of water, that is, dry or disconnected state. The base sensor 44 acts as a reference, using water as a conductor to conduct or disconnect with the liquid level sensors, forming an output signal. When the base sensor 44 and a liquid level sensor at any height position are simultaneously in the first state, it indicates that the liquid level is at or above the liquid level position of the liquid level sensor. Based on this, the second control module 48 can generate corresponding output signals to the pressure regulating valve 43 according to the state changes of multiple sensors, so as to control the opening and closing of the pressure regulating valve 43.

[0034] Furthermore, one of the multiple liquid level sensors is located at the lowest liquid level position and is configured as a low liquid level sensor 45, and another is located at the highest liquid level position and is configured as a high liquid level sensor 46. When the liquid level is between the lowest liquid level position and the highest liquid level position, the gas volume in the gas collecting member 41 is within a suitable range, and the water supply system can operate stably. Specifically, when the basic sensor 44 is in the first state and the low liquid level sensor 45 is in or has changed to the second state, the liquid level is low and there is too much gas in the gas collecting unit 41. At this time, the second control module 48 controls the pressure regulating valve 43 to open, so as to achieve partial gas discharge. When the basic sensor 44 is in the first state and the high liquid level sensor 46 is also in or has changed to the first state, the liquid level is high and there is insufficient gas in the gas collecting unit 41. At this time, the second control module 48 controls the pressure regulating valve 43 to close, so that the gas collecting unit 41 continues to collect and store more gas. When the basic sensor 44 and the low liquid level sensor 45 are in the first state and the high liquid level sensor 46 is in the second state, the liquid level is between the lowest and highest liquid levels. The gas storage in the gas collecting unit 41 is suitable for the stable operation of the water supply system. At this time, the second control module 48 does not generate an opening and closing action signal for the pressure regulating valve 43, so that the pressure regulating valve 43 maintains its original state.

[0035] As can be seen from the above characteristics, when the start-stop frequency of water supply pump 1 is less than the start-stop frequency limit, the stable operation of the water supply system depends on the base sensor 44 and the low liquid level sensor 45 being in the first state, and the high liquid level sensor 46 being in the second state. However, in actual operation, the liquid level in the gas collecting unit 41 may be lower than the position of the base sensor 44 due to water pressure fluctuations, etc. At this time, the base sensor 44 is in the second state, which cannot meet the judgment condition of the second control module 48, i.e., a failure problem occurs, causing the above-mentioned regulation function of the second control module 48 to malfunction.

[0036] In response to the above problems, such as Figure 2As shown, according to some embodiments of the present invention, the sensing module further includes a protection sensor 47, which is disposed in the water supply pipeline 5. The protection sensor 47 is communicatively connected to the second control module 48. The protection sensor 47 is in a first state when it encounters water and in a second state when it is removed from the water. The second control module 48 is adapted to generate the opening and closing action of the pressure regulating valve 43 based on the state changes of the protection sensor 47 and any one of the liquid level sensors. In this embodiment, the protection sensor 47 is located in the water supply pipeline 5 and is always in the first state. By temporarily replacing the basic sensor 44 with the protection sensor 47, the normal operation of the control program of the second control module 48 can be ensured without interruption. Specifically, when the protection sensor 47 is in the first state, the base sensor 44 is in the second state, and the low liquid level sensor 45 is also in the second state, the liquid level is low and there is too much gas in the gas collecting device 41. The second control module 48 outputs signals based on the states of the protection sensor 47 and the low liquid level sensor 45 to control the pressure regulating valve 43 to open, thereby partially discharging the gas. When the liquid level rises with the gas discharge to the liquid level position of the base sensor 44, the base sensor 44 switches back to the first state and continues to play the role of a reference. The second control module 48 can then receive the state signal of the base sensor 44 again and generate a control signal accordingly.

[0037] According to some embodiments of the present invention, the second control module 48 preferentially receives and processes the status signals of the base sensor 44 and the liquid level sensor; when the base sensor 44 fails, the second control module 48 receives and processes the status signals of the protection sensor 47 and the liquid level sensor. In this embodiment, since the liquid flow rate in the gas collecting device 41 is relatively slow and the medium stability is higher, the base sensor 44 can provide a more stable reference benchmark compared to the protection sensor 47.

[0038] According to some embodiments of the present invention, the gas collecting component 41 is disposed on the upper side of the water supply pipe 5, and the protection sensor 47 is disposed on the bottom of the water supply pipe 5. In this embodiment, the gas collecting component 41 is disposed on the upper side of the water supply pipe 5, which can achieve automatic gas collection by relying on the buoyancy of gas; the protection sensor 47 is disposed on the bottom of the water supply pipe 5, which can ensure that it is always in the water and maintains the first state output.

[0039] In the above embodiments, the second control module 48 first receives and processes the signals transmitted by the first control module 3, and then receives and processes the signals transmitted by the sensing module, thus ensuring the long-term effective safe and stable operation of the water supply system.

[0040] According to the water supply system of the present invention, the present invention also proposes a control method for the above-mentioned water supply system, the control method comprising the following steps: S1. Determine whether the pressure regulating valve 43 needs to be closed based on the start-stop frequency of the water supply pump 1: If the start-stop frequency of water supply pump 1 is greater than or equal to the start-stop frequency limit, then control pressure regulating valve 43 to close. If the start-stop frequency of water supply pump 1 is less than the start-stop frequency limit, then proceed to step S2; S2. Determine the opening and closing of the pressure regulating valve 43 based on the liquid level data in the gas collecting component 41.

[0041] According to the control method of the water supply system of the present invention, firstly, it is determined whether the pressure regulating valve 43 needs to be closed based on the start-stop frequency of the water supply pump 1, so that the pressure regulating effect can be achieved by using the air collecting component 41 when necessary; under the working condition of stable operation of the water supply system, that is, under the working condition of normal start-stop of the water supply pump 1, the pressure regulating valve 43 is controlled to adjust the air compression ratio of the air collecting component 41 by detecting the liquid level change in the air collecting component 41, so as to further improve the stability and safety of the water supply system operation.

[0042] Further, step S2 specifically includes: determining the opening and closing of the pressure regulating valve 43 based on the liquid level data within the gas collecting component 41. If the liquid level is higher than the highest liquid level position, control the pressure regulating valve 43 to close; If the liquid level is lower than the minimum liquid level position, the pressure regulating valve 43 will be opened.

[0043] The highest and lowest liquid level positions are determined by the installation positions of the high liquid level sensor 46 and the low liquid level sensor 45, which are set according to the operating requirements of the water supply system.

[0044] The water supply system and control method of the present invention can effectively control the water supply pump 1 to avoid frequent start-stop or prolonged operation, ensuring stable water supply; it can fundamentally eliminate the risk of secondary pollution and ensure water supply safety. The present invention can be applied to drinking water supply systems, especially piped direct drinking water supply systems.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0047] In the description of this invention, "a plurality of" means two or more.

[0048] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0049] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water supply system, characterized in that, include: A control unit includes a water supply pump, a pressure detection device, and a first control module; wherein the water supply pump and the pressure detection device are disposed in a water supply pipeline, and the pressure detection device is disposed after the water supply pump to detect the water supply pressure value in the water supply pipeline; the first control module is communicatively connected to the pressure detection device and the water supply pump to generate start-stop actions of the water supply pump based on the water supply pressure value; A pressure stabilizing unit includes a gas collecting component, a pressure stabilizing valve, and a second control module. The gas collecting component is located in the water supply pipeline and downstream of the control unit, and is adapted to collect and store gas in the water supply. The pressure stabilizing valve is connected to the gas collecting component to control the gas compression ratio within it. The second control module is communicatively connected to the pressure stabilizing valve to control its opening and closing. The first control module is communicatively connected to the second control module, and the second control module is adapted to generate the opening and closing action of the pressure regulating valve according to the start and stop frequency of the water supply pump.

2. The water supply system according to claim 1, characterized in that, The first control module presets the start pressure value and stop pressure value of the water supply pump; and the first control module is adapted to acquire the water supply pressure value and compare the water supply pressure value with the start pressure value and the stop pressure value, so as to control the water supply pump to start or stop.

3. The water supply system according to claim 2, characterized in that, The first control module presets a monitoring period and is adapted to record the number of times the water supply pump starts and stops within the monitoring period in order to calculate the start-stop frequency of the water supply pump.

4. The water supply system according to claim 3, characterized in that, The first control module or the second control module presets a start-stop frequency limit and compares the start-stop frequency with the start-stop frequency limit; when the start-stop frequency is greater than or equal to the start-stop frequency limit, the second control module controls the pressure regulating valve to close.

5. The water supply system according to claim 4, characterized in that, The voltage stabilizing unit also includes: A sensing module is disposed in the gas collecting component and / or the water supply pipeline to detect the liquid level data in the gas collecting component; the sensing module is communicatively connected to the second control module; when the start-stop frequency is less than the start-stop frequency limit, the second control module is adapted to control the opening and closing of the pressure regulating valve according to the liquid level data.

6. The water supply system according to claim 5, characterized in that, The sensing module includes: At least three sensors are provided, all disposed within the gas collection component and spaced apart from low to high along the height direction; each sensor is communicatively connected to the control module, and each sensor is in a first state when exposed to water and in a second state when removed from water; wherein... The sensor at the lowest position is configured as a basic sensor, and the other multiple sensors are configured as liquid level sensors; the second control module is adapted to generate the opening and closing action of the pressure regulating valve based on the state changes of the basic sensor and any one of the liquid level sensors.

7. The water supply system according to claim 6, characterized in that, The sensing module also includes: A protection sensor is installed in the water supply pipeline; the protection sensor is communicatively connected to the second control module; the protection sensor is in a first state when it encounters water and in a second state when it leaves the water; the second control module is adapted to generate the opening and closing action of the pressure regulating valve based on the state changes of the protection sensor and any one of the liquid level sensors.

8. The water supply system according to claim 7, characterized in that, The second control module preferentially receives and processes the status signals of the base sensor and the liquid level sensor; when the base sensor fails, the second control module receives and processes the status signals of the protection sensor and the liquid level sensor.

9. The water supply system according to claim 7, characterized in that, The gas collecting device is located on the upper side of the water supply pipeline, and the protection sensor is located at the bottom of the water supply pipeline.

10. A control method for a water supply system as described in any one of claims 1-9, characterized in that, Includes the following steps: Determine whether the pressure regulating valve needs to be closed based on the start-stop frequency of the water supply pump: If the start-stop frequency of the water supply pump is greater than or equal to the start-stop frequency limit, then the pressure regulating valve is controlled to close. If the start-stop frequency of the water supply pump is less than the start-stop frequency limit, the opening and closing of the pressure regulating valve is determined based on the liquid level data in the gas collecting device.

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