Water supply system and control method thereof

Abstract

Disclosed are a water supply system and a control method thereof. The water supply system comprises: a plurality of groups of water supply devices; a bus to which the plurality of groups of water supply devices are connected in parallel; and a power module connected with each group of water supply devices to supply power to each group of water supply devices; wherein each group of water supply devices comprises: a water pump; and a controller connected with the water pump, the water pump of each group of water supply devices operating in different working states under the driving of the controller connected therewith; the controller of each group of water supply devices is connected with the bus, the controller of each group of water supply devices acquires the working state / operation parameter of the group of water supply devices and the working state / operation parameter of other groups of water supply devices via the bus, and shares the working state / operation parameter of the group of water supply devices to other groups of water supply devices via the bus.

Description

Technical Field

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

[0002] With the promotion of energy conservation and emission reduction and the increasing demand for better water quality, water pumps account for a large proportion of overall social energy consumption, so the demand for variable frequency constant pressure water supply is growing.

[0003] Current water supply systems generally employ a constant pressure water supply method. These systems typically consist of a main control cabinet and multiple water pumps. The pumps operate under the control of this main control cabinet, or they can operate in a master-slave configuration, where one pump acts as the master and the others as slaves, with the master controlling the slaves. In essence, current water supply systems use a main control cabinet or master unit to control whether and how each slave pump is running.

[0004] When the aforementioned water supply system is started, multiple water pumps operate simultaneously. When the water demand is relatively low, this can lead to excessive operation of the pumps, resulting in a waste of resources. Summary of the Invention

[0005] In view of the above problems, the purpose of this invention is to provide a water supply system and its control method, in which multiple water supply devices are connected in parallel and share information, and each group of water supply devices controls its operating status according to actual needs.

[0006] The first aspect of the present invention provides a water supply system, comprising:

[0007] Multiple water supply units;

[0008] A bus, wherein multiple sets of the aforementioned water supply devices are connected in parallel to the bus; and

[0009] A power module is connected to each group of water supply devices to supply power to each group of water supply devices.

[0010] Each set of the water supply devices includes:

[0011] Water pumps; and

[0012] A controller is connected to the water pump, and each group of water supply devices operates in different working states under the drive of the controller connected to it.

[0013] The controller of each group of water supply devices is connected to the bus. The controller of each group of water supply devices obtains the working status / operating parameters of its own group of water supply devices and obtains the working status / operating parameters of other groups of water supply devices via the bus, and shares the working status / operating parameters of its own group of water supply devices with other groups of water supply devices via the bus.

[0014] Preferably, the controller includes:

[0015] Control module;

[0016] A water pump drive module connects the water pump to the control module, receives drive signals from the control module, and drives the water pump to operate in different working states according to the drive signals; and

[0017] A bus interface connects the bus to the control module.

[0018] Preferably, the controller includes a power conversion module that connects the power supply module to the control module.

[0019] Preferably, it includes:

[0020] The outlet pipe, and the outlets of multiple sets of the water supply devices are connected to the outlet pipe; and

[0021] One or more pressure sensors are located in the water outlet pipe, and each pressure sensor is connected to a set of water supply devices.

[0022] One or more pressure sensors are used to monitor the water pressure of the outlet pipe and provide it to the corresponding water supply device. The water pressure obtained by each group of water supply devices is shared with other groups of water supply devices via the bus. When the water pressure of the outlet pipe is greater than the start pressure value and less than the preset pressure value, multiple groups of water supply devices are started in sequence according to the preset priority.

[0023] Preferably, when a pressure sensor is installed on the water outlet pipe, the pressure sensor is connected to the controller of any group of water supply devices. The controller of the group of water supply devices obtains the water outlet pressure value of the water outlet pipe through the pressure sensor and uploads it to the bus, and shares it with the controllers of other groups of water supply devices through the bus.

[0024] Preferably, when multiple pressure sensors are installed on the water outlet pipe, each pressure sensor is connected to the controller of a corresponding group of water supply devices. Each group of water supply devices obtains the water outlet pressure value of the water outlet pipe through the corresponding pressure sensor and uploads it to the bus, which then shares it with the controllers of other groups of water supply devices.

[0025] Preferably, the power module is a solar-powered module, and the controller for each group of water supply devices includes:

[0026] A power interface, which is connected to the power module; and

[0027] The DC-DC conversion module connects the power interface to the control module to receive voltage provided by the power module via the power interface and convert the received voltage.

[0028] Preferably, the controller for each group of water supply devices further includes a power sampling module, which is connected between the power interface and the control module. The control module obtains the power supply power of the power module through the power sampling module, and when the power supply power of the power module reaches the start-up power, it sequentially starts multiple groups of water supply devices according to a preset priority.

[0029] Preferably, each group of water supply devices further includes a human-machine interaction module;

[0030] The controller also includes a human-computer interaction interface, which connects the human-computer interaction module to the control module.

[0031] Preferably, the human-computer interaction module includes a button module and a display module.

[0032] A second aspect of the present invention provides a control method for a water supply system, the water supply system comprising multiple sets of water supply devices connected in parallel to a bus, the control method comprising:

[0033] Each water supply unit operates in different working states under its own drive.

[0034] Each group of water supply devices acquires the operating status / operating parameters of its own group of water supply devices and acquires the operating status / operating parameters of other groups of water supply devices via the bus, and shares the operating status / operating parameters of its own group of water supply devices with other groups of water supply devices via the bus.

[0035] Preferably, the operating states of the multiple sets of water supply devices include: shutdown state, working state, detection state, and fault state. When each set of water supply devices is in a fault state, or when it is detected that another set of water supply devices is not in a fault state but is difficult to start during the startup process, the state of that set of water supply devices is updated to a fault state.

[0036] Preferably, multiple water supply devices are started sequentially according to a preset priority.

[0037] Preferably, the method of sequentially activating multiple water supply devices according to a preset priority includes:

[0038] Start the highest priority and non-faulty water supply unit;

[0039] When the first operating parameter of the currently operating water supply device reaches the first preset value, determine whether to start the next priority water supply device;

[0040] If the first operating parameter of the currently operating water supply device does not reach the first preset value, determine whether the currently operating water supply device needs to be shut down.

[0041] Preferably, when the outlet pressure of the water supply system is greater than the start-up pressure but less than the preset pressure, multiple water supply devices are started sequentially according to a preset priority.

[0042] Preferably, the operating states include constant pressure operation and rated speed / power operation.

[0043] Preferably, the water supply device that has been started enters a constant pressure operation state from the shutdown state;

[0044] When one of the water supply devices starts, the water supply device with the highest priority changes from constant pressure operation to rated speed / rated power operation.

[0045] When one of the water supply devices is shut down, the water supply device with the highest priority in operation switches from rated speed / rated power operation to constant pressure operation.

[0046] Preferably, during the process of multiple water supply devices being started sequentially according to a preset priority, the outlet pressure of the water supply system is continuously acquired. When the outlet pressure of the water supply system is equal to the preset pressure value, the last water supply device started operates in a constant pressure state.

[0047] Preferably, during the process of starting multiple water supply devices in sequence according to a preset priority, when the water outlet pressure of the water supply system is greater than the preset pressure value, the last water supply device started is shut down, and the water supply device with the next higher priority than the last water supply device starts up to operate at constant pressure. At this time, if the water outlet pressure does not drop, all water supply devices are shut down; if the water outlet pressure drops, the water supply devices are shut down sequentially until the water outlet pressure equals the preset pressure value.

[0048] Preferably, the first operating parameters include the pump speed / power of each water supply device; the first preset value is the rated speed / rated power, and the speed / power of the rated speed / power operating state is greater than the speed / power of the constant pressure operating state.

[0049] Preferably, when the power supply reaches the starting power, multiple water supply devices are started sequentially according to a preset priority.

[0050] Preferably, the operating state includes MPPT operating state and rated speed / power operating state.

[0051] Preferably, the water supply device that has been started enters the MPPT operation state from the shutdown state;

[0052] When one of the water supply devices starts up, the water supply device with the highest priority in operation switches from MPPT operation state to rated speed / rated power operation state.

[0053] When one of the water supply devices is shut down, the water supply device with the highest priority in operation switches from rated speed / rated power operation to MPPT operation.

[0054] Preferably, the method for determining whether the currently operating water supply device needs to be shut down includes:

[0055] Obtain the first operating parameter of the previous priority water supply device of the currently operating water supply device, and determine whether the ratio of the first operating parameter of the previous priority water supply device to the first preset value is less than the second preset value.

[0056] If the value is less than the second preset value, the currently operating water supply device will be shut down, and the previous priority water supply device will change from the rated speed / power operating state to the MPPT operating state.

[0057] If the value is greater than or equal to the second preset value, the currently operating water supply device will continue to operate in its original state.

[0058] Preferably, if the currently operating water supply device is the only one in operation, and the first operating parameter of the currently operating water pump is less than the third preset value, the currently operating water supply device shall be shut down.

[0059] Preferably, the first operating parameters include the pump speed / power of each water supply device; the first preset value is the rated speed / rated power, and the speed / power of the rated speed / power operating state is greater than the speed / power of the MPPT operating state.

[0060] Preferably, the second preset value is, for example, 0.9.

[0061] Preferably, if the power supply does not reach the starting power, the power supply continues to be acquired.

[0062] Preferably, the method for activating the highest priority and non-faulty water supply device includes:

[0063] Determine if the highest priority water supply device is in a fault state;

[0064] If the highest priority water supply device is not in a faulty state, then the highest priority water supply device shall be activated.

[0065] If the highest priority water supply device is in a fault state, determine whether the next priority water supply device is in a fault state, until a water supply device that is not in a fault state is found, and then start the water supply device that is not in a fault state.

[0066] Preferably, the method for determining whether to activate the next priority water supply device includes:

[0067] Determine if there are any water supply devices with lower priority than the currently operating water supply devices that are not faulty;

[0068] If present, the next priority water supply unit that is not in a faulty state will be activated;

[0069] If it does not exist, the currently operating water supply device will remain in its original working state.

[0070] Preferably, after activating the next priority water supply device that is in a non-faulty state, the process further includes:

[0071] Determine whether the next priority water supply device that is in a non-faulty state should be started;

[0072] If started, the first operating parameters of the currently running water supply device are obtained;

[0073] If it does not start, it will restart after a preset time.

[0074] Restart the next priority water supply device. If the waiting time exceeds a preset time, the next priority water supply device that is in a non-faulty state will become a faulty state.

[0075] The water supply system control method and water supply system provided by the present invention connect multiple sets of water supply devices in parallel to a bus. The multiple sets of water supply devices share information through the bus. Each set of water supply devices drives itself to operate in different operating states according to the actual situation, thereby avoiding resource waste caused by excessive operation of water supply devices.

[0076] Furthermore, compared to the simultaneous activation of multiple water supply devices in a host-controlled water supply system, the water supply system of this embodiment is more flexible in terms of opening and closing, making it easier to adjust the opening and closing of the water supply devices according to actual conditions.

[0077] In a preferred embodiment, the water supply system determines whether to activate the system and the number of water supply devices to start based on the actual power supply of the power module. This ensures that fewer water supply devices are activated when the power supply of the power module is relatively low, and more water supply devices are activated when the power supply of the power module is relatively high. Compared to water supply systems that cannot control multiple water supply devices individually and can only operate simultaneously, this embodiment effectively avoids the situation where all water supply devices cannot work when the power supply of the power module is insufficient. It can fully utilize the power supply of the power module and further make full use of solar energy.

[0078] In a preferred embodiment, the first operating parameter (pump speed / power) of the water supply device is used to determine whether the power supply is sufficient to start the next priority water supply device, so that all the operating water supply devices are in optimal operating condition.

[0079] In a preferred embodiment, when the power supply of the power module is sufficient, it drives as many water supply devices as possible to operate; when the power supply of the power module is insufficient, it drives a limited number of water supply devices to operate. This allows for full utilization of the power supply of the power module and, more importantly, full utilization of the solar energy received by the power module.

[0080] In a preferred embodiment, the decision to start the water supply system and the number of water supply devices to be started are determined based on whether the current water supply meets the water demand, thus avoiding resource waste caused by excessive operation of water supply devices.

[0081] The system determines whether the number of currently activated water supply devices meets the water supply demand based on the operating status of each group of water supply devices, and also determines its own operating status based on the operating status of each group of water supply devices.

[0082] In a preferred embodiment, multiple groups of water supply devices share information via a bus to adjust their own operating status according to the water supply devices of other groups. Attached Figure Description

[0083] The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0084] Figure 1 A schematic diagram of the circuit structure of the water supply system according to the first embodiment of the present invention is shown;

[0085] Figure 2 A schematic diagram of the circuit structure of each group of water supply devices according to the first embodiment of the present invention is shown;

[0086] Figure 3 A schematic diagram of the circuit structure of the controller according to the first embodiment of the present invention is shown;

[0087] Figure 4 A flowchart illustrating the control method of a water supply system according to a first embodiment of the present invention is shown.

[0088] Figure 5 A flowchart illustrating a method for sequentially activating multiple groups of water supply devices according to a preset priority, as per the first embodiment of the present invention, is shown.

[0089] Figure 6 A schematic diagram of the circuit connection structure of the water supply system according to the second embodiment of the present invention is shown;

[0090] Figure 7A schematic diagram of the circuit connection structure of the controller for each group of water supply devices in the second embodiment of the present invention is shown;

[0091] Figure 8 A flowchart illustrating the operation method of the water supply system according to the second embodiment of the present invention is shown;

[0092] Figure 9 A flowchart illustrating a method for sequentially activating multiple sets of water supply devices according to a preset priority, as per a second embodiment of the present invention, is shown. Detailed Implementation

[0093] The invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale. Furthermore, some well-known parts may not be shown.

[0094] This invention can be presented in various forms, some of which will be described below.

[0095] Figure 1 A schematic diagram of the circuit structure of the water supply system according to the first embodiment of the present invention is shown; as follows: Figure 1 As shown, the water supply system 100 includes multiple sets of water supply devices 110, a bus 120, and a power module 130. Each set of water supply devices 110 is electrically connected to the power module 130. The bus 120 is connected to each set of water supply devices 110, and multiple sets of water supply devices 110 are connected in parallel to the bus 120.

[0096] Figure 2 A schematic diagram of the circuit structure of each water supply device in the water supply system of the first embodiment of the present invention is shown; as follows: Figure 2 As shown, each water supply device 110 includes at least a water pump 111 and a controller 112. The inlet of the water pump 111 is connected to a water source, and the outlet of the water pump 111 is connected to an outlet pipe. The water pump 111 supplies water through the outlet pipe.

[0097] Figure 3 This diagram illustrates the circuit structure of the controller for each group of water supply devices in the water supply system according to the first embodiment of the present invention; as shown. Figure 3 As shown, the controller 112 includes at least a control module 1121, a motor drive module 1122, a bus interface 1123, a DC-DC conversion module 1125, and a power interface 1126.

[0098] The motor drive module 1122 connects the water pump 111 to the control module 1121. The motor drive module 1122 receives the drive signal provided by the control module 1121 and drives the water pump 111 to operate in different working states according to the drive signal. Different working states include, for example, shutdown state, MPPT (Maximum Power Point Tracking) operation state, rated maximum speed / rated maximum power operation state, and fault state.

[0099] The bus 120 is connected to the control module 1121 of each group of water supply devices 110 via the bus interface 1123. Multiple groups of water supply devices 110 are connected in parallel to the bus 120; the bus 120 is used to realize information sharing among the multiple groups of water supply devices 110. In this embodiment, the bus interface 1123 is, for example, a 485 interface, but is not limited thereto.

[0100] The operating states of the multiple groups of water supply devices include: shutdown state, working state, detection state, and fault state; wherein, the working state includes MPPT operating state and rated speed / power operating state; the operating state of each group of water supply devices is shared with other groups of water supply devices via the bus.

[0101] Furthermore, the controller of each water supply unit detects the fault status of the water pumps connected to it. When it detects that the water pump connected to it is in a fault state, or when it detects that the water pump connected to it is not in a fault state but finds that the water pump connected to it is difficult to start during the startup process, the controller updates the status of the water supply unit to a fault state and shares it with the controllers of other water supply units via the bus.

[0102] In this embodiment, the power module 130 is, for example, a solar power module, and the power module 130 is connected to the controller 112 via the power interface 1126 of each group of water supply devices 110;

[0103] Specifically, the power module 130 is connected to the DC-DC conversion module 1125 of the controller 112 via the power interface 1126 of each of the water supply devices 110. The DC-DC conversion module 1125 connects the power interface 1126 to the control module 1121. The DC-DC conversion module 1125 receives the voltage provided by the power module 130 via the power interface 1126 and converts the received voltage to provide a suitable voltage to the control module 1121.

[0104] Furthermore, a power sampling module 1127 is also connected between the power interface 1126 and the control module 1121. The power sampling module 1127 obtains the power supply power of the power module 130 via the power interface 1126.

[0105] Furthermore, the power interface 1126 is also connected to the water pump 111 via the motor drive module 1122, and the power module 130 supplies power to the water pump 111 via the power interface 1126.

[0106] Furthermore, each water supply device 110 also includes a human-machine interface module 113, which includes a button module 1131 and a display module 1132. The controller 112 also includes a human-machine interface 1124; the human-machine interface 1124 is used to connect the button module 1131 and the display module 1132 to the control module 1121.

[0107] Figure 4 A flowchart illustrating the working method of the water supply system according to the first embodiment of the present invention is shown; as follows: Figure 4 As shown, the control method of the water supply system includes the following steps.

[0108] S100: Set the start-up priority for each group of water supply devices.

[0109] In this embodiment, multiple sets of water supply devices 110 are connected in parallel to the bus 120. After each set of water supply devices 110 is powered on, it is in a shutdown state. Then, the start-up priority of each set of water supply devices 110 is set. When the power provided by the power module 130 reaches the start-up power, the multiple sets of water supply devices 110 start up sequentially according to the start-up priority.

[0110] Furthermore, each group of water supply devices 110 is numbered via the button module 1131 of the human-computer interaction module 113, and the starting order of each group of water supply devices 110 is set according to their numbers to obtain the starting priority of each group of water supply devices 110.

[0111] In one specific embodiment, the multiple sets of water supply devices 110 are, for example, a first water supply device 11, a second water supply device 12, ..., an Nth water supply device 1n; wherein the numbers of the first water supply device 11, the second water supply device 12, ..., the Nth water supply device 1n are, for example, 1, 2, ..., n. In this embodiment, the activation priority of each set of water supply devices 110 is set according to the order of their numbers, that is, the first water supply device numbered 1 is set as the first priority, the second water supply device 12 numbered 2 is set as the second priority, ..., and the Nth water supply device 1n numbered N is set as the Nth priority. In other embodiments, the activation priority of each set of water supply devices 110 can also be set according to the reverse order or any other order of their numbers; this embodiment does not limit this.

[0112] Furthermore, the activation priority of each group of water supply devices 110 can be displayed via the display module 1132 of that group of water supply devices 110, and provided to the control module 1121 of other groups of water supply devices 110 via the bus 120. That is, each group of water supply devices 110 receives the activation priority of its own group of water supply devices 110 provided via the button module 1131, and the activation priorities of other groups of water supply devices 110 provided via the bus 120. After receiving the activation priorities of its own group and / or other groups of water supply devices 110, each group of water supply devices 110 updates the control module 1121 of its own group of water supply devices 110.

[0113] S110: Determine whether the power supply of the power supply system has reached the starting voltage.

[0114] In this step, the control module 1121 of each group of water supply devices 110 can be configured to acquire the power supply value of the power module 130 at a first time interval. Alternatively, the control module 1121 of the highest priority water supply device 110 can be configured to acquire the power supply value of the power module 130 at a first time interval. In this embodiment, to save power, communication, and computation, it is preferable that the control module 1121 of the highest priority water supply device 110 acquires the power supply value of the power module 130 at a first time interval and determines whether it has reached the start-up power.

[0115] Specifically, when the power supply value of the power module 130 reaches the start-up power, multiple sets of water supply devices are started sequentially according to a preset priority. When the power supply value of the power module 130 does not reach the start-up power, the power supply value of the power module 130 continues to be acquired at a first time interval.

[0116] Figure 5 The flowchart illustrates a method for sequentially activating multiple sets of water supply devices according to a preset priority, as shown in the first embodiment of the present invention. Figure 5 As shown, the method for sequentially activating multiple sets of the water supply devices according to a preset priority specifically includes:

[0117] S111: Start the water supply device with the highest priority and that is not faulty.

[0118] In this step, the operating status of the highest priority water supply device (e.g., the first priority water supply device) is obtained, and it is determined whether it is in a fault state. If the highest priority water supply device is not in a fault state, it is started; if the highest priority water supply device is in a fault state, the operating status of the next priority water supply device (e.g., the second priority water supply device) is obtained, and it is determined whether it is in a fault state, until a water supply device that is not in a fault state is found, and that water supply device that is not in a fault state is started.

[0119] In this embodiment, the water pump 111 of the activated water supply device 110 enters the MPPT running state from the stopped state, while the non-activated water supply device 110 remains in the stopped state. The starting power is, for example, the power sufficient to start at least one set of water pumps of the water supply device 110. In other embodiments, the starting power can be arbitrarily set as needed, and this embodiment does not impose any restrictions on this.

[0120] Furthermore, the control module 1121 of each group of water supply devices 110 periodically acquires the operating status of the water pump 111 of that group of water supply devices 110, and the operating status of the water pump 111 of that group of water supply devices 110 is provided to the control modules 1121 of other groups of water supply devices 110 via the bus 120. The operating status of the water pump 111 of each group of water supply devices 110 includes, for example, a shutdown status, an MPPT operating status, a rated maximum speed / rated maximum power operating status, and a fault status.

[0121] S112: Determine whether the first operating parameter of the currently operating water supply device has reached the first preset value;

[0122] The first operating parameters of the currently operating water supply device are obtained at a second time interval. When the first operating parameters of the currently operating device reach the first preset value, the process proceeds to step S1131: determine whether there is a water supply device with a lower priority than the currently operating water supply device and which is not faulty; when the first operating parameters of the currently operating water supply device do not reach the first preset value, the process proceeds to step S1132: determine whether the currently operating water supply device is shut down.

[0123] In this embodiment, the first operating parameter includes the pump speed / power of each water supply device; the first preset value is, for example, the rated maximum speed / rated maximum power, where the speed / power in the rated speed / power operating state is greater than the speed / power in the MPPT operating state. This embodiment uses the first operating parameter (pump speed / power) of the water supply device to determine whether the power supply energy is sufficient to start the next priority water supply device. Specifically, when the first operating parameter of the currently operating device reaches the first preset value, it indicates that the power supply energy of the power module is sufficient; when the first operating parameter of the currently operating water supply device does not reach the first preset value, it indicates that the power supply energy of the power module is insufficient.

[0124] This embodiment can fully utilize the solar energy received by the power module. Specifically, when the power module has sufficient power, the next priority water supply device is activated, so that as many water supply devices as possible can be driven to operate when the power module has sufficient power. When the power module has insufficient power, it is determined whether the currently operating water supply device needs to be shut down, so that a limited number of water supply devices can be driven to operate when the power module has insufficient power.

[0125] In step S1131, if there is a non-faulty water supply device 110 with a lower priority than the currently operating water supply device 110, then the non-faulty water supply device with the next lower priority is started. If there is no water supply device 110 with a lower priority than the currently operating water supply device 110, then the currently operating water supply device continues to operate in its original state.

[0126] Furthermore, the method for determining whether there is a non-faulty water supply device with a lower priority than the currently operating water supply device includes: obtaining the operating status of the next-priority water supply device 110 and determining whether it is in a fault state. If the next-priority water supply device is in a fault state, it is skipped until a water supply device 110 that is not in a fault state is obtained. In this case, there is a non-faulty water supply device 110 with a lower priority than the currently operating water supply device 110. If all water supply devices 110 with a lower priority than the currently operating water supply device are in a fault state, then there is no non-faulty water supply device 110 with a lower priority than the currently operating water supply device 110.

[0127] The water supply unit that is started enters the MPPT (Maximum Power Level Test) operating state from the shutdown state. When one group of water supply units starts, the water supply unit with the highest priority enters the rated maximum speed / rated maximum power operating state from the MPPT operating state. When the water supply unit 110 is the last priority, its operating state will not change to the rated maximum speed / rated maximum power operating state.

[0128] Furthermore, after starting the next-priority water supply device that is not faulty, the process also includes determining whether the next-priority water supply device in the non-faulty state has started; if it has started, the first operating parameters of the currently running water supply device are obtained, and its operating state is changed according to the changes in its first operating parameters; if it has not started, it is restarted within a preset time. During the restart process, if the waiting time exceeds the preset time, the next-priority water supply device in the non-faulty state becomes faulty; the currently running water supply device maintains its rated speed / power state, and the next-level water supply device in the non-faulty state is started; if the currently running water pump is the last non-faulty water pump, it becomes a constant pressure operating state.

[0129] Further, step S1132: the method for determining whether the currently operating water supply device needs to be shut down includes: obtaining the first operating parameter of the previous priority water supply device of the currently operating water supply device, and determining whether the ratio of the first operating parameter of the previous priority water supply device to a first preset value is less than a second preset value. If it is less than the second preset value, the currently operating water supply device is shut down, and the previous priority water supply device changes from the rated speed / power operating state to the MPPT operating state; if it is greater than or equal to the second preset value, the currently operating water supply device maintains its original operating state.

[0130] If the previous priority water supply device 110 is in a fault state, the previous priority water supply device 110 is skipped, and the previous priority water supply device 110 that is in operation (usually the rated maximum speed / rated maximum power operation state) is found.

[0131] Furthermore, when it is determined that the currently operating water supply device 110 needs to be shut down, the operating state of the currently operating water supply device 110 changes from MPPT operating state to shutdown state, while the operating state of the water supply device 110 with the higher priority that is currently operating changes from rated maximum speed / rated maximum power operating state to MPPT operating state. When it is determined that the currently operating water supply device 110 does not need to be shut down, it continues to operate in MPPT mode.

[0132] In this embodiment, the second operating parameter includes the ratio of operating power to rated maximum power, and the second preset value is, for example, 0.9.

[0133] If the currently operating water supply device is the only one in operation, and the first operating parameter of the currently operating water pump is less than the third preset value, the currently operating water supply device will be shut down.

[0134] Furthermore, the second time interval and the third time interval may be the same as or different from the first time interval. Those skilled in the art can set the first time interval, the second time interval, and the third time interval as needed, and this embodiment does not impose any restrictions on this.

[0135] Figure 6 A schematic diagram of the circuit connection structure of the water supply system according to a second embodiment of the present invention is shown; as follows: Figure 6 As shown, the water supply system 200 includes multiple sets of water supply devices 210, a bus 220, and a power module 230. Each set of water supply devices 210 is electrically connected to the power module 230. The bus 220 is connected to each set of water supply devices 210, and multiple sets of water supply devices 210 are connected in parallel to the bus 220.

[0136] Each set of water supply devices 210 includes a water pump 211 and a controller 212. The water pump 211 includes at least an inlet 2111 and an outlet 2112. The inlet 2111 of each set of water pumps 211 is connected to a water source, and the outlets 2112 of multiple sets of water pumps 211 are connected to an outlet pipe 240. The water pumps 211 supply water through the outlet pipe 240.

[0137] In this embodiment, the power module 230 provides mains power to each group of water supply devices 210. Figure 7 A schematic diagram of the circuit connection structure of the controller for each group of water supply devices in the second embodiment of the present invention is shown; as follows: Figure 7 As shown, the controller 212 includes at least a control module 2121, a motor drive module 2122, a bus interface 2123, and a power conversion module 2125.

[0138] The motor drive module 2122 connects the water pump 211 to the control module 2121. The motor drive module 2122 receives drive signals provided by the control module 2121 and drives the water pump 211 to operate in different working states according to the drive signals. Different working states include, for example, shutdown state, constant pressure operation state, rated power / rated speed operation state, and fault state.

[0139] The bus 220 is connected to the control module 2121 of each group of water supply devices 210 via the bus interface 2123. The pressure sensor 250 on the outlet pipe 240 is connected to the control module 2121 of the corresponding controller 212. The controller 212 acquires the outlet pressure value of the outlet pipe 240 and uploads it to the bus 220 via the bus interface 2123. The bus 220 provides the outlet pressure value uploaded by the controller 212 to the controller 212 of the other groups of water supply devices 210 via the bus interface 2123. Besides sharing the outlet pressure value acquired by the controller 212 of each group of water supply devices 210, the bus 220 can also achieve other information sharing among multiple groups of water supply devices 210.

[0140] Each group of water supply devices 210 can operate its water pumps 211 in at least constant pressure mode and rated power / rated speed mode. Specifically, when the water pumps operate in constant pressure mode, the control module 2121 of each group of water supply devices 210 obtains the outlet pressure of the water pump 2112 via the bus 220, and the control module 2121 drives the water pump 211 to operate at a constant pressure via the motor drive module 2122. When the water pumps operate in rated power / rated speed mode, the control module 2121 drives the water pump 211 to operate at rated power / rated speed via the motor drive module 2122.

[0141] Furthermore, the controller 212 of each water supply device detects the fault status of the water pump 211 connected to it. When it detects that the water pump connected to it is in a fault state, or when it detects that the water pump connected to it is not in a fault state but finds that the water pump connected to it is difficult to start during the startup process, the controller 212 of the water supply device 210 is updated to a fault state and shared with the controllers 212 of other water supply devices 210 via the bus 220.

[0142] The power conversion module 2125 connects the power supply module 230 to the control module 2121, and is used to receive the voltage provided by the power supply module 230 and convert the received voltage to supply power to the control module 2121.

[0143] Each water supply device 210 further includes a human-machine interface module 213, which includes a button module 2131 and a display module 2132. The controller 212 further includes a human-machine interface 2124; the human-machine interface 2124 is used to connect the button module 2131 and the display module 2132 to the control module 2121.

[0144] Continue reading Figure 6The water supply system 200 in this embodiment also includes a pressure sensor 250, which is located inside the outlet pipe.

[0145] At least one pressure sensor 250 is installed inside the water outlet pipe 240 to acquire the water outlet pressure of the water outlet pipe 240 for monitoring. In this embodiment, the outlets 2112 of multiple sets of water pumps 211 are connected to the water outlet pipe 240, and the water outlet pressure of the water outlet pipe 240 is the water outlet pressure of the water supply system.

[0146] When a pressure sensor 250 is installed on the water outlet pipe 240, the pressure sensor 250 is connected to the controller 212 of any group of water supply devices 210. The controller 212 of the group of water supply devices 210 obtains the water outlet pressure value of the water outlet pipe 240 through the pressure sensor 250, and uploads the obtained water outlet pressure value to the bus 220, which is then shared with the controllers 212 of other groups of water supply devices 210 via the bus 220.

[0147] When multiple pressure sensors 250 are installed on the water outlet pipe 240, each pressure sensor 250 is connected to the controller 212 of a corresponding group of water supply devices 210. Each group of water supply devices 210 obtains the water outlet pressure value of the water outlet pipe 240 through the corresponding pressure sensor 250, and the controller 212 of each group of water supply devices 210 uploads the obtained water outlet pressure value to the bus to achieve the sharing of water outlet pressure values. Furthermore, when the pressure sensor 250 connected to a certain group of water supply devices 210 fails, the water outlet pressure value uploaded to the bus by other groups of water supply devices 210 can be obtained through the bus interface of that group of water supply devices 210; if all pressure sensors 250 fail, the pressure sensors 250 of the water outlet pipe 240 are determined to be in a faulty state. Furthermore, if the pressure sensor 250 is not connected or has poor contact, resulting in the inability to obtain a pressure value, the pressure sensor 250 of the water outlet pipe 240 is determined to be faulty.

[0148] Figure 8 A flowchart illustrating the working method of the water supply system according to a second embodiment of the present invention is shown; as follows: Figure 8 As shown, the working method of the water supply system includes the following steps.

[0149] S200: Set the start-up priority for each group of water supply devices.

[0150] In this embodiment, multiple sets of water supply devices 210 are connected in parallel to the bus 220. After each set of water supply devices 210 is powered on, it is in a stopped state. Then, the start-up priority of each set of water supply devices 210 is set. When the water pressure of the outlet pipe is greater than the start-up pressure value and less than the preset pressure value, the multiple sets of water supply devices 210 are started sequentially according to the start-up priority.

[0151] The method for setting the start-up priority of each group of water supply devices is the same as in the first embodiment, and will not be repeated here.

[0152] S210: Determine whether the outlet pressure of the water supply system is greater than the starting pressure value and less than the preset pressure value.

[0153] In this step, the start pressure value and the preset pressure value are set via the button module 2131 of the human-machine interaction module 213. With all water pumps of the water supply devices stopped, the outlet pipe itself has a water pressure; to avoid frequent start-ups of the water supply devices due to factors such as water pipe leakage, a start-up threshold (i.e., start-up pressure value) is set in this embodiment, and the water supply device is only started when the outlet pressure of the outlet pipe reaches the start-up pressure value.

[0154] Furthermore, the control module 2121 of each group of water supply devices 210 acquires the outlet pressure of the pressure sensor 250 on the outlet pipe 240 at a fourth time interval. When the outlet pressure of the outlet pipe 240 is greater than the start-up pressure value but less than the preset pressure value, multiple groups of water supply devices are started sequentially according to a preset priority. When the outlet pressure is greater than or equal to the preset pressure value, the control module 2121 of each group of water supply devices 210 continues to acquire the outlet pressure of the outlet pipe 240 at a fourth time interval.

[0155] In this embodiment, when the water pressure of the outlet pipe 240 is greater than the starting pressure value but less than the preset pressure value, it is determined that the water pressure of the outlet pipe 240 cannot meet the water supply demand, and the water supply system needs to be started to supply water. When the water pressure of the outlet pipe 240 is greater than or equal to the preset pressure value, it is determined that the water pressure of the outlet pipe 240 can meet the water supply demand, and the water supply system does not need to be started to supply water. The water pressure of the outlet pipe 240 is then acquired at the first time interval to monitor the water pressure of the outlet pipe 240.

[0156] Furthermore, when the water supply system needs to be started, multiple water supply devices are started sequentially according to a preset priority, and the number of water supply devices to be started is determined according to the water pressure of the outlet pipe.

[0157] During the process of starting multiple water supply devices in sequence according to the preset priority, the water pressure of the outlet pipe is continuously monitored. When the water pressure of the outlet pipe is equal to the preset pressure value, the last water supply device started will operate in a constant pressure state.

[0158] When the water pressure in the outlet pipe exceeds the preset pressure value, the last water supply device started will be shut down. The water supply device with the next higher priority after the last water supply device will then operate at constant pressure. If the water pressure in the outlet pipe does not drop, it indicates that the outlet pipe is closed, and all water supply devices will be shut down. If the water pressure in the outlet pipe drops, it indicates that the outlet pipe is not closed, and the water supply devices will be shut down sequentially until the water pressure equals the preset pressure value.

[0159] When the water pressure at the outlet pipe is greater than the starting pressure value but less than the preset pressure value, each group of water supply devices determines its operating status based on the operating status of its own group of water supply devices and the operating status of other groups of water supply devices.

[0160] Figure 9 The flowchart illustrates a method for sequentially activating multiple groups of water supply devices according to a preset priority, as shown in the second embodiment of the present invention. Figure 9 As shown, the method for sequentially activating multiple sets of the water supply devices according to a preset priority specifically includes:

[0161] S211: Start the water supply device with the highest priority and that is not faulty.

[0162] In this step, the control module 2121 of each group of water supply devices 210 periodically acquires the operating status of the water pump 211 of that group of water supply devices 210 and determines whether the acquired operating status is a fault state. The operating status of the water pump 211 of each group of water supply devices 210 includes, for example, a shutdown state, a constant pressure operation state, a rated speed / rated power operation state, and a fault state. Furthermore, the operating status of the water pump 211 of that group of water supply devices 210 is also provided to the control modules 2121 of other groups of water supply devices 210 via the bus 220.

[0163] When the water pressure at the outlet pipe 240 is greater than the starting pressure but less than the preset pressure, it is determined whether the highest priority water supply device (e.g., the first priority water supply device) is in a fault state. If the highest priority water supply device is not in a fault state, it is activated. If the highest priority water supply device is in a fault state, it is determined whether the next priority water supply device (e.g., the second priority water supply device) is in a fault state, until a water supply device that is not in a fault state is found, and that non-faulty water supply device is activated. That is, the highest priority water supply device among the non-faulty water supply devices is activated.

[0164] In this embodiment, the water pump 211 of the activated water supply device 210 enters the constant pressure operation state from the shutdown state, while the non-activated water supply device 210 remains in the shutdown state.

[0165] S220: Determine whether the first operating parameter of the currently operating water supply device has reached the first preset value.

[0166] The first operating parameters of the currently operating water supply device are acquired at a fifth time interval, and its operating state is changed according to the changes in its first operating parameters. Specifically, this includes:

[0167] S212: Determine whether the first operating parameter of the currently operating water supply device has reached the first preset value.

[0168] When the first operating parameter of the currently operating device reaches the first preset value, the process proceeds to step S2131: determining whether there is a water supply device with a lower priority than the currently operating device that is not faulty; if so, starting the next priority water supply device that is in a faulty state; if not, the currently operating water supply device maintains its original state. When the first operating parameter of the currently operating water supply device is lower than the first preset value, the process proceeds to step S2132: determining whether the currently operating water supply device needs to be shut down.

[0169] In this embodiment, the first operating parameter includes the pump speed / power of each water supply device; the first preset value is, for example, the rated speed / rated power, wherein the speed / power in the rated speed / power operating state is greater than the speed / power in the constant pressure operating state. This embodiment uses the first operating parameter (pump speed / power) of the water supply device to determine whether the currently operating pump meets the water supply requirements of the outlet pipe 240. Specifically, when the first operating parameter reaches the first preset value, it means that the currently operating pump cannot meet the water supply requirements of the outlet pipe 240; when the first operating parameter of the currently operating water supply device does not reach the first preset value, it means that the currently operating pump can meet the water supply requirements of the outlet pipe 240.

[0170] Furthermore, the method for determining whether there is a non-faulty water supply device with a lower priority than the currently operating water supply device includes: obtaining the operating status of the next-priority water supply device 210 and determining whether it is in a fault state. If the next-priority water supply device is in a fault state, it is skipped until a water supply device 210 that is not in a fault state is obtained. In this case, there is a non-faulty water supply device 210 with a lower priority than the currently operating water supply device 210. If all water supply devices 210 with a lower priority than the currently operating water supply device are in a fault state, then there is no non-faulty water supply device 210 with a lower priority than the currently operating water supply device 210.

[0171] The water supply devices that are started transition from a stopped state to a constant pressure operating state. When one group of water supply devices starts, the water supply device with the highest priority transitions from a constant pressure operating state to a rated speed / rated power operating state. When the water supply device 210 is the lowest priority, its operating state will not change to the rated speed / rated power operating state, and it will continue to maintain a constant pressure operating state.

[0172] Furthermore, after starting the next-priority water supply device that is not faulty, the process also includes obtaining the operating status of the next-priority water supply device that is in a non-faulty state and determining whether it is started; if started, the first operating parameters of the currently running water supply device are obtained at a fifth time interval; if not started, it is restarted within a preset time. If the waiting time exceeds the preset time, the next-priority water supply device that is in a non-faulty state becomes faulty; the currently running water supply device maintains its rated speed / power state, and the next-level water supply device that is in a non-faulty state is started; if the currently running water pump is the last non-faulty water pump, it becomes a constant pressure operating state.

[0173] Furthermore, after starting multiple sets of water supply devices in sequence according to the preset priority, the water pressure of the outlet pipe is continuously monitored. When the water pressure of the outlet pipe is equal to the preset pressure value, the last water supply device started operates in a constant pressure state.

[0174] In step S2132, during the process of sequentially starting multiple sets of water supply devices according to a preset priority, the water pressure of the outlet pipe is continuously monitored. The system determines whether the currently operating water supply device needs to be shut down by judging whether the first operating parameter of the currently operating water supply device is greater than the preset pressure value. If the first operating parameter of the currently operating water supply device is greater than the preset pressure value, the last water supply device started is shut down, and the water supply device with the next higher priority than the last started water supply device becomes constant pressure operation. If the first operating parameter of the currently operating water supply device does not reach the preset pressure value, the currently operating water supply device maintains its original operation.

[0175] In this embodiment, when the first operating parameter is greater than the preset pressure value, it indicates that the number of currently operating water supply devices has exceeded the water supply demand. Therefore, the last water supply device started is turned off to avoid wasting resources by turning on too many water supply devices.

[0176] After shutting down the last water supply device that was started, if the water pressure in the outlet pipe does not drop, it indicates that the outlet pipe is closed, so shut down all water supply devices; if the water pressure in the outlet pipe drops, it indicates that the outlet pipe is not closed, so shut down the water supply devices one by one until the water pressure equals the preset pressure value.

[0177] Furthermore, when the water pressure in the outlet pipe equals the preset pressure value, it indicates that the number of currently operating water supply devices just meets the water supply demand, and the last water supply device started operates in a constant pressure state.

[0178] Furthermore, when the currently operating water supply device 210 needs to be shut down, its operating state changes from constant pressure operation to shutdown, while the operating state of the water supply device 210 with the highest priority that is currently operating changes from rated speed / rated power operation to constant pressure operation. When it is determined that the currently operating water supply device 210 does not need to be shut down, it continues to maintain constant pressure operation.

[0179] The water supply system control method and system provided by this invention connect multiple sets of water supply devices in parallel and set the start-up priority for each set of water supply devices. When the power supply power of the power module reaches the start-up power, the multiple sets of water supply devices are started sequentially according to the preset priority. This allows the water supply system to control the number of water supply devices started based on the power supply energy of the power module, further enabling fewer water supply devices to be started when the power supply energy of the power module is relatively low, and more water supply devices to be started when the power supply energy of the power module is relatively high. Compared with a water supply system that simultaneously supplies multiple sets of water supply devices, this embodiment effectively avoids the situation where all water supply devices cannot work effectively when the power supply energy of the power module is low.

[0180] Furthermore, the controller of each water supply device controls its own working state and can control its own opening and closing according to demand. Compared with the simultaneous start of multiple water supply devices in a master-slave control water supply system, the opening and closing of the water supply system in this embodiment of the invention is more flexible, so as to control the number of water supply devices to be started according to water supply demand.

[0181] In a preferred embodiment, when the first operating parameter of the currently running device reaches a first preset value, it indicates that the power supply energy of the power module meets the requirements for starting the water pump. When the first operating parameter of the currently running water supply device does not reach the first preset value, it indicates that the power supply energy of the power module is insufficient. The first operating parameter (water pump speed / power) of the water supply device is used to determine whether the power supply energy is sufficient to start the next priority water supply device, so that all running water supply devices are in optimal operating condition.

[0182] In a preferred embodiment, the next priority water supply device is activated when the power module has sufficient power; when the power module has insufficient power, it is determined whether the currently operating water supply device needs to be shut down. This embodiment of the invention enables the power module to drive as many water supply devices as possible when it has sufficient power, and to drive a limited number of water supply devices when it has insufficient power, thus fully utilizing the solar energy received by the power module.

[0183] As described above, these embodiments of the present invention do not exhaustively cover all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A water supply system, comprising: Multiple water supply units; A bus, wherein multiple sets of the water supply devices are connected in parallel to the bus; A power module is connected to each group of water supply devices to supply power to each group of water supply devices. The outlet pipe is a converging connection between the outlets of multiple sets of the water supply devices. as well as One or more pressure sensors are located in the water outlet pipe, and each pressure sensor is connected to a set of water supply devices. Each set of the water supply devices includes: Water pumps; and A controller is connected to the water pump, and each group of water supply devices operates in different working states under the drive of the controller connected to it. The controller of each group of water supply devices is connected to the bus. The controller of each group of water supply devices obtains the working status / operating parameters of its own group of water supply devices and obtains the working status / operating parameters of other groups of water supply devices via the bus. It also shares the working status / operating parameters of its own group of water supply devices with other groups of water supply devices via the bus. One or more pressure sensors are used to monitor the water pressure of the outlet pipe and provide it to the corresponding water supply device. The water pressure obtained by each group of water supply devices is shared with other groups of water supply devices via the bus. Each group of water supply devices is in a shutdown state after being powered on. When the water pressure of the outlet pipe is greater than the start pressure value and less than the preset pressure value, multiple groups of water supply devices are started in sequence according to the preset priority, and the number of water supply devices to be started is determined according to the water pressure of the outlet pipe. Multiple sets of water supply devices share information via the bus, and each set of water supply devices drives itself to operate in different operating states according to the actual situation.

2. The water supply system according to claim 1, wherein, The controller includes: Control module; A water pump drive module connects the water pump to the control module, receives drive signals from the control module, and drives the water pump to operate in different working states according to the drive signals; and A bus interface connects the bus to the control module.

3. The water supply system according to claim 2, wherein, The controller includes a power conversion module that connects the power supply module to the control module.

4. The water supply system according to claim 1, wherein, When a pressure sensor is installed on the water outlet pipe, the pressure sensor is connected to the controller of any group of water supply devices. The controller of the group of water supply devices obtains the water outlet pressure value of the water outlet pipe through the pressure sensor and uploads it to the bus, which then shares it with the controllers of other groups of water supply devices.

5. The water supply system according to claim 1, wherein, When multiple pressure sensors are installed on the water outlet pipe, each pressure sensor is connected to the controller of a corresponding group of water supply devices. Each group of water supply devices obtains the water outlet pressure value of the water outlet pipe through the corresponding pressure sensor and uploads it to the bus, which then shares it with the controllers of other groups of water supply devices.

6. The water supply system according to claim 2, wherein, The power module is a solar power module, and the controller for each group of water supply devices includes: A power interface, which is connected to the power module; and The DC-DC conversion module connects the power interface to the control module to receive voltage provided by the power module via the power interface and convert the received voltage.

7. The water supply system according to claim 6, wherein, The controller for each group of water supply devices further includes a power sampling module, which is connected between the power interface and the control module. The control module obtains the power supply power of the power module through the power sampling module, and when the power supply power of the power module reaches the start-up power, it starts multiple groups of water supply devices in sequence according to a preset priority.

8. The water supply system according to claim 2, wherein, Each water supply device also includes a human-computer interaction module; The controller also includes a human-computer interaction interface, which connects the human-computer interaction module to the control module.

9. The water supply system according to claim 8, wherein, The human-computer interaction module includes a button module and a display module.

10. A control method for a water supply system according to claim 1, wherein the water supply system comprises multiple sets of water supply devices connected in parallel to a bus, and the control method comprises: Each water supply unit operates in different working states under its own drive. Each group of water supply devices obtains the working status / operating parameters of its own group of water supply devices and obtains the working status / operating parameters of other groups of water supply devices via the bus, and shares the working status / operating parameters of its own group of water supply devices with other groups of water supply devices via the bus. Each group of water supply devices obtains the water pressure from the outlet pipe. The water pressure obtained by each group of water supply devices is shared with other groups of water supply devices via the bus. Each group of water supply devices is in a shutdown state after being powered on. When the water pressure from the outlet pipe is greater than the start-up pressure value but less than the preset pressure value, multiple groups of water supply devices are started sequentially according to the preset priority. The number of water supply devices to be started is determined according to the water pressure from the outlet pipe.

11. The control method for a water supply system according to claim 10, wherein, The operating states of the multiple sets of water supply devices include: shutdown state, working state, detection state, and fault state. When each set of water supply devices is in a fault state, or when it is detected that a device is not in a fault state but is difficult to start during the startup process, the state of that set of water supply devices is updated to a fault state.

12. The control method for a water supply system according to claim 10, wherein, The method of activating multiple water supply devices sequentially according to a preset priority includes: Start the highest priority and non-faulty water supply unit; When the first operating parameter of the currently operating water supply device reaches the first preset value, determine whether to start the next priority water supply device; If the first operating parameter of the currently operating water supply device does not reach the first preset value, determine whether the currently operating water supply device needs to be shut down.

13. The control method for a water supply system according to claim 12, wherein, When the outlet pressure of the water supply system is greater than the start-up pressure but less than the preset pressure, multiple water supply devices are started sequentially according to the preset priority.

14. The control method for a water supply system according to claim 11, wherein, The operating states include constant pressure operation and rated speed / power operation.

15. The control method for a water supply system according to claim 14, wherein, The water supply system, once started, transitions from a stopped state to a constant pressure operating state. When one of the water supply devices starts, the water supply device with the highest priority changes from constant pressure operation to rated speed / rated power operation. When one of the water supply devices is shut down, the water supply device with the highest priority in operation switches from rated speed / rated power operation to constant pressure operation.

16. The control method for a water supply system according to claim 15, wherein, During the process of multiple water supply devices being started sequentially according to a preset priority, the outlet pressure of the water supply system is continuously acquired. When the outlet pressure of the water supply system equals the preset pressure value, the last water supply device started operates in a constant pressure state.

17. The control method for a water supply system according to claim 15, wherein, During the process of multiple water supply devices being started sequentially according to a preset priority, when the water outlet pressure of the water supply system is greater than the preset pressure value, the last water supply device started is shut down. The water supply device with the next higher priority after the last water supply device starts then operates at constant pressure. At this time, if the water outlet pressure does not drop, all water supply devices are shut down; if the water outlet pressure drops, the water supply devices are shut down sequentially until the water outlet pressure equals the preset pressure value.

18. The control method for a water supply system according to claim 12, wherein, The first operating parameters include the pump speed / power of each water supply device; the first preset value is the rated speed / rated power.

19. The control method for a water supply system according to claim 14, wherein, The speed / power of the rated speed / power operating state is greater than the speed / power of the constant pressure operating state.

20. The control method for a water supply system according to claim 12, wherein, When the power supply reaches the starting power, multiple water supply devices will start sequentially according to the preset priority.

21. The control method for a water supply system according to claim 20, wherein, The operating states include MPPT operating state and rated speed / power operating state.

22. The control method for a water supply system according to claim 21, wherein, The water supply unit that has been started has entered the MPPT operation state from the shutdown state; When one of the water supply devices starts up, the water supply device with the highest priority in operation switches from MPPT operation state to rated speed / rated power operation state. When one of the water supply devices is shut down, the water supply device with the highest priority in operation switches from rated speed / rated power operation to MPPT operation.

23. The control method for a water supply system according to claim 22, wherein, Methods for determining whether a currently operating water supply system needs to be shut down include: Obtain the first operating parameter of the previous priority water supply device of the currently operating water supply device, and determine whether the ratio of the first operating parameter of the previous priority water supply device to the first preset value is less than the second preset value. If the value is less than the second preset value, the currently operating water supply device will be shut down, and the previous priority water supply device will change from the rated speed / power operating state to the MPPT operating state. If the value is greater than or equal to the second preset value, the currently operating water supply device will continue to operate in its original state.

24. The control method for a water supply system according to claim 23, wherein, If the currently operating water supply device is the only one in operation, and the first operating parameter of the currently operating water pump is less than the third preset value, the currently operating water supply device will be shut down.

25. The control method for a water supply system according to claim 21, wherein, The first operating parameters include the pump speed / power of each water supply device; the first preset value is the rated speed / rated power, and the speed / power of the rated speed / power operating state is greater than the speed / power of the MPPT operating state.

26. The control method for a water supply system according to claim 23, wherein, The second preset value is 0.

9.

27. The control method for a water supply system according to claim 20, wherein, If the power supply does not reach the starting power, the power supply continues to be acquired.

28. The control method for a water supply system according to claim 11, wherein, Methods for activating the highest priority and non-faulty water supply unit include: Determine if the highest priority water supply device is in a fault state; If the highest priority water supply device is not in a faulty state, then the highest priority water supply device shall be activated. If the highest priority water supply device is in a fault state, determine whether the next priority water supply device is in a fault state, until a water supply device that is not in a fault state is found, and then start the water supply device that is not in a fault state.

29. The control method for a water supply system according to claim 11, wherein, Methods for determining whether to activate the next priority water supply unit include: Determine if there are any water supply devices with lower priority than the currently operating water supply devices that are not faulty; If present, the next priority water supply unit that is not in a faulty state will be activated; If it does not exist, the currently operating water supply device will remain in its original working state.

30. The method of claim 14, wherein, After activating the next priority water supply unit that is in a non-faulty state, the following steps are also included: Determine whether the next priority water supply device that is in a non-faulty state should be started; If started, the first operating parameters of the currently running water supply device are obtained; If it does not start, it will restart after a preset time. Restart the next priority water supply device. If the waiting time exceeds a preset time, the next priority water supply device that is in a non-faulty state will become a faulty state.

Images