CN115369951A

CN115369951A - Water supply system and control method thereof

Info

Publication number: CN115369951A
Application number: CN202211046004.4A
Authority: CN
Inventors: 曹柏锋; 李文杰; 李明慧; 闵文彦
Original assignee: Hangzhou Shiteng Technology Co ltd
Current assignee: Hangzhou Shiteng Technology Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-11-22

Abstract

Disclosed are a water supply system and a control method thereof, the water supply system including: a plurality of groups of water supply devices; the water supply devices are connected to the bus in parallel; the power supply module is connected with each group of water supply devices and supplies power to each group of water supply devices; wherein each set of the water supply devices comprises: a water pump; the controller is connected with the water pumps, and the water pumps of each group of water supply devices are driven by the controller correspondingly connected with the water supply devices to operate in different working states; the controller of each group of water supply devices is connected with the bus, 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 through the bus, and shares the working state/operation parameter of the group of water supply devices with the other groups of water supply devices through the bus.

Description

Water supply system and control method thereof

Technical Field

The invention relates to the technical field of semiconductors, in particular to a water supply system and a control method thereof.

Background

Along with the promotion of energy conservation and emission reduction and the improvement of the demand on water use experience, the water pump accounts for a large proportion of the energy consumption of the whole society, so that the demand on variable-frequency constant-pressure water supply is increased more and more.

The existing water supply system generally adopts a constant-pressure water supply mode, wherein the water supply system comprises a main control cabinet and a plurality of water pumps. The multiple water pumps run under the control of one master control cabinet, or the multiple water pumps run in a master-slave mode, namely, one water pump is a master machine, other water pumps are slave machines, and the master machine controls the slave machines to run. Namely, the main control cabinet or the main machine in the existing water supply system controls whether each slave machine operates and the operation state.

When the water supply system is started, the water pumps run simultaneously, and when the water supply demand is relatively small, the water pumps can run excessively, so that the resource waste is caused.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a water supply system and a control method thereof, in which a plurality of sets of water supply devices are connected in parallel and share information, and each set of water supply device controls the operation state of the set of water supply devices according to actual demand.

A first aspect of the present invention provides a water supply system comprising:

a plurality of groups of water supply devices;

the plurality of groups of water supply devices are connected to the bus in parallel; and

the power supply module is connected with each group of water supply devices and supplies power to each group of water supply devices;

wherein each set of the water supply devices comprises:

a water pump; and

the controller is connected with the water pumps, and the water pumps of each group of water supply devices are driven by the controller correspondingly connected with the water supply devices to operate in different working states;

the controller of each group of water supply devices is connected with the bus, 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 through the bus, and shares the working state/operation parameter of the group of water supply devices with the other groups of water supply devices through the bus.

Preferably, the controller includes:

a control module;

the water pump driving module is used for connecting the water pump to the control module, receiving the driving signal provided by the control module and driving the water pump to operate in different working states according to the driving signal; and

a bus interface connecting the bus to the control module.

Preferably, the controller comprises a power conversion module connecting the power supply module to the control module.

Preferably, the method comprises the following steps:

the water outlets of the water supply devices in the groups are connected with the water outlet pipe in a gathering manner; and

one or more pressure sensors are positioned on the water outlet pipe, and each pressure sensor is correspondingly connected to a group of water supply devices;

the one or more pressure sensors are used for monitoring the water outlet pressure of the water outlet pipe and providing the water outlet pressure for corresponding water supply devices, the water outlet pressure obtained by each group of water supply devices is shared by other groups of water supply devices through the bus, and when the water outlet pressure of the water outlet pipe is greater than a starting pressure value and smaller than a preset pressure value, the multiple groups of water supply devices are started in sequence according to preset priority.

Preferably, when one pressure sensor is arranged on the water outlet pipe, the one pressure sensor is connected to the controller of any group of water supply devices, and the controller of the group of water supply devices acquires the water outlet pressure value of the water outlet pipe through the one pressure sensor, uploads the water outlet pressure value to the bus, and shares the water outlet pressure value with the controllers of other groups of water supply devices through the bus.

Preferably, when a plurality of pressure sensors are arranged on the water outlet pipe, each pressure sensor is connected to the controller of a corresponding group of the water supply devices, and each group of the water supply devices acquires the water outlet pressure value of the water outlet pipe through the corresponding pressure sensor, uploads the water outlet pressure value to the bus, and shares the water outlet pressure value with the controllers of other groups of the water supply devices through the bus.

Preferably, the power module is a solar power module, and the controller of each group of the water supply devices comprises:

a power interface connected to the power module; and

a DC-DC conversion module connecting the power interface to a control module for receiving a voltage provided by the power module via the power interface and converting the received voltage.

Preferably, the controller of each set of the water supply device further includes: the power sampling module 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 starting power, the plurality of groups of water supply devices are sequentially started according to preset priority.

Preferably, each group of the water supply devices further comprises a human-computer interaction module;

the controller also comprises a human-computer interaction interface which connects the human-computer interaction module to the control module.

Preferably, the human-computer interaction module comprises a key module and a display module.

A second aspect of the present invention provides a control method of a water supply system including a plurality of sets of water supply devices connected in parallel to a bus, the control method including:

each group of water supply devices operates in different working states under the drive of the water supply devices;

and each group of water supply devices acquires the working state/operating parameter of the group of water supply devices and the working state/operating parameter of other groups of water supply devices through the bus, and shares the working state/operating parameter of the group of water supply devices with the other groups of water supply devices through the bus.

Preferably, the plurality of sets of operating states of the water supply device include: the water supply device comprises a shutdown state, a working state, a detection state and a fault state, wherein when each group of water supply devices is in the fault state or is detected not to be in the fault state, but is difficult to start in the starting process, the state of the group of water supply devices is updated to the fault state.

Preferably, the plurality of groups of water supply devices are sequentially started according to a preset priority.

Preferably, the method for starting the plurality of groups of water supply devices in sequence according to the preset priority comprises the following steps:

starting the water supply device with the highest priority and no fault;

when a first operation parameter of the currently operated water supply device reaches a first preset value, judging whether to start a water supply device with the next priority;

and when the first operation parameter of the currently operated water supply device does not reach the first preset value, judging whether the currently operated water supply device needs to be closed.

Preferably, when the water outlet pressure value of the water supply system is greater than the starting pressure value and less than the preset pressure value, the multiple groups of water supply devices are started in sequence according to the preset priority.

Preferably, the operating state includes a constant pressure operating state and a rated speed/power operating state.

Preferably, the started water supply device enters a constant-pressure operation state from a shutdown state;

when one group of water supply devices is started, the water supply device with the previous priority enters a rated rotating speed/rated power operation state from a constant-pressure operation state;

when one group of water supply devices is closed, the water supply device with the previous priority enters a constant-pressure operation state from a rated rotation speed/rated power operation state.

Preferably, the water supply system continuously acquires the water outlet pressure of the water supply system in the process that the plurality of groups of water supply devices are sequentially started according to the preset priority, and when the water outlet pressure of the water supply system is equal to the preset pressure value, the finally started water supply device operates in a constant-pressure operation state.

Preferably, in the process that the plurality of groups of water supply devices are sequentially started according to the preset priority, when the water outlet pressure of the water supply system is greater than the preset pressure value, the last started water supply device is closed, the water supply device with the priority on the last started water supply device is changed into constant-pressure operation, and at the moment, if the water outlet pressure of the water outlet pipe is not reduced, all the water supply devices are closed; and if the water outlet pressure of the water outlet pipe is reduced, closing the water supply devices in sequence until the water outlet pressure is equal to the preset pressure value.

Preferably, the first operating parameter comprises the water pump speed/power of each group of water supply devices; the first preset value is rated rotating speed/rated power, and the rotating speed/power in the rated rotating speed/power operation state is larger than that in the constant-pressure operation state.

Preferably, when the power supply reaches the starting power, the plurality of groups of water supply devices are started in sequence according to a preset priority.

Preferably, the operating state includes an MPPT operating state and a rated rotation speed/power operating state.

Preferably, the started water supply device enters an MPPT operation state from a stop state;

when one group of water supply devices is started, the water supply device with the previous priority enters a rated rotating speed/rated power operation state from the MPPT operation state;

when one group of water supply devices is closed, the water supply device with the previous priority enters the MPPT operation state from the rated rotation speed/rated power operation state.

Preferably, the method of judging whether the currently operated water supply device needs to be shut down includes:

and acquiring a first operation parameter of a previous priority water supply device of the current operation water supply device, and judging whether the ratio of the first operation parameter of the previous priority water supply device to the first preset value is smaller than a second preset value.

If the current running water supply device is smaller than the second preset value, the current running water supply device is closed, and the last priority water supply device is changed into the MPPT running state from the rated rotating speed/power running state;

if the current water supply device is larger than or equal to the second preset value, the current water supply device keeps the original state to operate.

Preferably, if the currently operating water supply device is the only one group of water supply devices in the operating state, the currently operating water supply device is turned off when the first operating parameter of the currently operating water pump is less than the third preset value.

Preferably, the first operating parameter comprises the water pump speed/power of each group of water supply devices; the first preset value is a rated rotating speed/rated power, and the rotating speed/power of the rated rotating speed/power running state is larger than that of the MPPT running state.

Preferably, the second preset value is, for example, 0.9.

Preferably, when the supply power does not reach the starting power, the supply power is continuously obtained.

Preferably, the method of activating the highest priority and non-malfunctioning water supply comprises:

judging whether the water supply device with the highest priority is in a fault state;

if the water supply device with the highest priority is not in a fault state, starting the water supply device with the highest priority;

and if the water supply device with the highest priority is in the fault state, judging whether the water supply device with the next priority is in the fault state or not until the water supply device which is not in the fault state is obtained, and starting the water supply device which is not in the fault state.

Preferably, the method of judging whether to activate the water supply device of the next priority includes:

judging whether a non-fault water supply device with a priority lower than that of the currently operated water supply device exists;

if so, starting the water supply device with the next priority in the non-fault state;

if not, the current running water supply device keeps the original working state.

Preferably, the starting of the water supply device of the next priority in the non-fault state further includes:

judging whether the water supply device with the next priority in the non-fault state is started or not;

if the water supply device is started, acquiring a first operation parameter of the currently operated water supply device;

if not, restarting within preset time;

and restarting the water supply device of the next priority, and if the waiting time exceeds the preset time, changing the water supply device of the next priority in the non-fault state into the fault state.

According to the water supply system control method and the water supply system, the plurality of groups of water supply devices are connected to the bus in parallel, the plurality of groups of water supply devices share information through the bus, each group of water supply devices drive the water supply devices to operate in different operation states according to actual conditions, and resource waste caused by excessive operation of the water supply devices is avoided.

Furthermore, compared with the situation that the host controls a plurality of groups of water supply devices in the water supply system to be started simultaneously, the opening and closing of the water supply system provided by the embodiment of the invention are more flexible, and the opening and closing of the water supply devices can be conveniently adjusted according to actual conditions.

In a preferred embodiment, the water supply system determines whether the water supply system is started and the number of the started water supply devices according to the actual power supply condition of the power module, so that the water supply devices with less number are started when the power supply power of the power module is relatively low, and the water supply devices with more number are started when the power supply power of the power module is relatively high; for the water supply system that can not control the multiple water supply devices independently and can only operate simultaneously, the embodiment effectively avoids that all the water supply devices can not work when the power supply module has insufficient power supply, can fully utilize the power supply of the power supply module, and further fully utilizes the energy of solar energy.

In a preferred embodiment, it is determined by means of a first operating parameter (water pump speed/power) of the water supply whether the supply power is sufficient to activate the next priority water supply, so that the operating water supplies are all in an optimal operating state.

In a preferred embodiment, when the power supply power of the power supply module is sufficient, the power supply module drives as many groups of water supply devices as possible to operate, and when the power supply power of the power supply module is insufficient, the power supply module drives a limited group of water supply devices to operate, so that the power supply power of the power supply module can be fully utilized, and further, the solar energy received by the power supply module can be fully utilized.

In the preferred embodiment, whether the water supply system is started and the number of the started water supply devices are determined according to whether the current water supply meets the water supply requirement, so that the resource waste caused by the excessive operation of the water supply devices is avoided.

And judging whether the number of the currently started water supply devices meets the water supply requirement or not according to the running state of each group of water supply devices, and determining the working state of each group of water supply devices according to the running state of each group of water supply devices.

In a preferred embodiment, a plurality of groups of the water supply devices realize information sharing through the bus so as to adjust the working state of the water supply devices according to other groups of the water supply devices.

Drawings

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

fig. 1 shows a schematic circuit configuration diagram of a water supply system of a first embodiment of the present invention;

fig. 2 is a schematic diagram showing a junction circuit configuration of each set of water supply apparatuses according to the first embodiment of the present invention;

fig. 3 shows a schematic circuit configuration diagram of the controller of the first embodiment of the present invention;

fig. 4 is a flowchart illustrating a control method of a water supply system according to a first embodiment of the present invention;

fig. 5 is a flowchart illustrating a method of sequentially activating a plurality of sets of the water supply devices according to a preset priority in accordance with the first embodiment of the present invention;

FIG. 6 is a schematic view showing an electric connection structure of a water supply system according to a second embodiment of the present invention;

fig. 7 is a schematic diagram showing a circuit connection structure of a controller of each set of water supply apparatuses in the second embodiment of the present invention;

fig. 8 is a flow chart schematically illustrating a method of operating the water supply system according to the second embodiment of the present invention;

fig. 9 is a flowchart illustrating a method for sequentially activating a plurality of sets of the water supply devices according to a preset priority according to the second embodiment of the present invention.

Detailed Description

The invention will be described in more detail below with reference to the accompanying drawings. Like elements are denoted by like reference numerals throughout the various figures. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. In addition, certain well known components may not be shown.

The present invention may be embodied in various forms, some examples of which are described below.

Fig. 1 shows a schematic circuit configuration diagram of a water supply system of a first embodiment of the present invention; as shown in fig. 1, the water supply system 100 includes a plurality of sets of water supply devices 110, a bus 120, and a power module 130. Wherein, each set of the water supply device 110 is electrically connected to the power module 130. The bus 120 is connected to each group of the water supply devices 110, and the plurality of groups of the water supply devices 110 are connected to the bus 120 in parallel.

Fig. 2 is a schematic diagram showing the electric circuit configuration of each set of the water supply devices in the water supply system according to the first embodiment of the present invention; as shown in fig. 2, each set of the water supply device 110 at least includes a water pump 111 and a controller 112. Wherein, the water inlet of water pump 111 is connected to the water supply water source, the delivery port of water pump 111 is connected to the outlet pipe, water pump 111 realizes supplying water via the outlet pipe.

Fig. 3 is a schematic diagram showing an electric circuit configuration of a controller of each set of water supply devices in the water supply system according to the first embodiment of the present invention; as shown in fig. 3, the controller 112 at least includes a control module 1121, a motor driving module 1122, a bus interface 1123, a DC-DC conversion module 1125, and a power interface 1126.

The motor driving module 1122 connects the water pump 111 to the control module 1121, and the motor driving module 1122 is configured to receive a driving signal provided by the control module 1121 and drive the water pump 111 to operate in different working states according to the driving signal. The different operating states include, for example, a shutdown state, a Maximum Power Point Tracking (MPPT) operating state, a rated Maximum rotational speed/rated Maximum Power operating state, a fault state, and the like.

The bus 120 is connected to the control modules 1121 of each group of the water supply devices 110 through the bus interface 1123 of each group of the water supply devices 110. A plurality of groups of the water supply devices 110 are connected to the bus 120 in parallel; the bus 120 is used for information sharing among the water supply devices 110. In this embodiment, the bus interface 1123 is, for example, a 485 interface, but is not limited thereto.

The operation states of the plurality of sets of water supply devices include: a shutdown state, a working state, a detection state and a fault state; the working state comprises an MPPT (maximum power point tracking) running state and a rated rotating speed/power running state; the operation state of each group of the water supply devices is shared to other groups of the water supply devices through the bus.

Further, the controller of each group of water supply devices detects the fault state of the water pump connected with the controller, and when the controller detects that the water pump connected with the controller is in the fault state or detects that the water pump connected with the controller is not in the fault state, but the controller finds that the water pump connected with the controller is difficult to start in the starting process, the controller updates the state of the group of water supply devices to the fault state and shares the state with the controller of the other group of water supply devices through a bus.

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 set of the water supply devices 110;

specifically, the power supply module 130 is connected to the DC-DC conversion module 1125 of the controller 112 via the power supply interface 1126 of each set of the water supply devices 110, and the DC-DC conversion module 1125 connects the power supply interface 1126 to the control module 1121. The DC-DC conversion module 1125 is used for receiving the voltage provided by the power module 130 via the power interface 1126 and converting the received voltage to provide a suitable voltage to the control module 1121.

Further, a power sampling module 1127 is connected between the power source interface 1126 and the control module 1121, and the power sampling module 1127 obtains the power supply of the power source module 130 via the power source interface 1126.

Further, the power interface 1126 is further connected to the water pump 111 via the motor driving module 1122, and the power module 130 supplies power to the water pump 111 via the power interface 1126.

Further, each group of the water supply device 110 further includes a human-computer interaction module 113, which includes a key module 1131 and a display module 1132. The controller 112 also includes a human-machine-interaction interface 1124; the human-computer interface 1124 is used to connect the button module 1131 and the display module 1132 to the control module 1121.

Fig. 4 is a flow chart schematically illustrating a method of operating the water supply system according to the first embodiment of the present invention; as shown in fig. 4, the control method of the water supply system includes the following steps.

S100: and setting the starting priority of each group of the water supply devices.

In this embodiment, a plurality of sets of the water supply devices 110 are connected to the bus 120 in parallel. After each set of the water supply devices 110 is powered on, the device is in a shutdown state. Then, the start priority of each group of the water supply devices 110 is set, and when the power provided by the power module 130 reaches the start power, the plurality of groups of the water supply devices 110 are sequentially started according to the start priority.

Further, each group of the water supply devices 110 is numbered through the key module 1131 of the human-computer interaction module 113, and the starting sequence of the water supply devices 110 is set according to the number of each group, so as to obtain the starting priority of each group of the water supply devices 110.

In one specific embodiment, the plurality of sets of water supply devices 110 are, for example, a first water supply device 11, a second water supply device 12, \8230;, an Nth water supply device 1N; wherein, the first water supply device 11, the second water supply device 12, the water supply device 8230, the water supply device N has the serial numbers of 1, 2, 8230, 8230and N. In this embodiment, the priority for starting each group of the water supply devices 110 is set according to the sequence of the numbers of the groups of the water supply devices 110, that is, the first water supply device with the number 1 is set as the first priority, the second water supply device with the number 2 is set as the second priority, \8230 \ 8230;, and the Nth water supply device with the number N is set as the Nth priority. In other embodiments, the priority for starting each group of the water supply apparatuses 110 may also be set in a reverse order of the numbers of the groups of the water supply apparatuses 110 or in any order, which is not limited in this embodiment.

Further, the activation priority of each group of the water supply devices 110 may also be displayed via the display module 1132 of the group of the water supply devices 110 and provided to the control modules 1121 of the other groups of the water supply devices 110 via the bus 120. That is, each group of water supply apparatuses 110 receives the start priority of the group of water supply apparatuses 110 provided by the key module 1131 and the start priority of the other groups of water supply apparatuses 110 provided by the bus 120, and after each group of water supply apparatuses 110 receives the start priority of the group of water supply apparatuses 110 and/or the other groups of water supply apparatuses 110, the start priority is updated to the control module 1121 of the group of water supply apparatuses 110.

S110: and judging whether the power supply power of the power supply system reaches a starting voltage or not.

In this step, the control module 1121 of each group of the water supply devices 110 may be configured to obtain the power supply value of the power module 130 at a first time interval, or the control module 1121 of the water supply device 110 with the highest priority may be configured to obtain the power supply value of the power module 130 at a first time interval. In this embodiment, in order to save the electric quantity, the communication quantity and the calculation quantity, it is preferable that the control module 1121 of the water supply device 110 with the highest priority obtains the power supply value of the power module 130 at a first time interval, and determines whether the power supply value reaches the starting power.

When the obtained power supply value of the power module 130 reaches the starting power, the plurality of groups of water supply devices are started in sequence according to the preset priority. When the acquired power supply of the power supply module 130 does not reach the starting power, the power supply of the power supply module 130 is continuously acquired at the first time interval.

Fig. 5 is a flowchart illustrating a method for sequentially starting a plurality of sets of water supply apparatuses according to a preset priority according to a first embodiment of the present invention, and as shown in fig. 5, the method for sequentially starting a plurality of sets of water supply apparatuses according to a preset priority specifically includes:

s111: the water supply device with the highest priority and no fault is started.

In this step, the operating state of the water supply apparatus with the highest priority (for example, the water supply apparatus of the first priority) is acquired, and it is judged whether or not it is in a failure state. If the water supply device with the highest priority is not in a fault state, starting the water supply device with the highest priority; and if the water supply device with the highest priority is in the fault state, acquiring the working state of the water supply device with the next priority (such as the water supply device with the second priority), judging whether the water supply device is in the fault state or not, and starting the water supply device which is not in the fault state until the water supply device which is not in the fault state is acquired.

In this embodiment, the water pump 111 of the water supply device 110 that is started is switched from the shutdown state to the MPPT operation state, and the water supply device 110 that is not started is still in the shutdown state. The starting power is, for example, power capable of starting at least one group of water pumps of the water supply device 110, and in other embodiments, the starting power may be arbitrarily set according to needs, which is not limited in this embodiment.

Further, the control module 1121 of each group of the water supply devices 110 periodically obtains the operating state of the water pumps 111 of the group of the water supply devices 110, and the operating state of the water pumps 111 of the group of the water supply devices 110 is provided to the control modules 1121 of the other groups of the water supply devices 110 via the bus 120. The operation state of the water pump 111 of each set of the water supply device 110 includes, for example, a stop state, an MPPT operation state, a rated maximum rotation speed/rated maximum power operation state, a fault state, and the like.

S112: judging whether a first operation parameter of a currently operated water supply device reaches a first preset value;

acquiring a first operation parameter of the currently operated water supply device at a second time interval, and when the currently operated first operation parameter reaches a first preset value, entering step S1131: judging whether a non-fault water supply device with a priority lower than that of the currently operated water supply device exists; when the first operation parameter of the currently operating water supply device does not reach the first preset value, step S1132 is performed: and judging whether the currently operated water supply device is closed or not.

In this embodiment, the first operating parameter includes a water pump rotation speed/power of each group of water supply devices; the first preset value is, for example, a rated maximum rotating speed/a rated maximum power, and the rotating speed/power of the rated rotating speed/power operation state is greater than that of the MPPT operation state. The embodiment judges whether the power supply energy is enough to start the water supply device with the next priority through the first operation parameter (water pump rotating speed/power) of the water supply device. Specifically, when the first operating parameter of the currently operating water supply device reaches the first preset value, the power supply energy of the power supply module is sufficient, and when the first operating parameter of the currently operating water supply device does not reach the first preset value, the power supply energy of the power supply module is insufficient.

The solar energy received by the power supply module can be fully utilized by the embodiment. Specifically, when the power supply energy of the power supply module is sufficient, the water supply device of the next priority is started, so that when the power supply energy of the power supply module is sufficient, as many groups of water supply devices as possible are driven to operate. When the power supply energy of the power supply module is insufficient, whether the currently operated water supply device needs to be closed is judged, so that when the power supply energy of the power supply module is insufficient, the limited group of water supply devices are driven to operate.

In step S1131, if there is a water supply apparatus 110 having a priority lower than that of the currently operating water supply apparatus 110 and having no fault, the water supply apparatus having the next priority is started, and if there is no water supply apparatus having a priority lower than that of the currently operating water supply apparatus 110, the currently operating water supply apparatus is kept operating in the original state.

Further, the method of determining whether there is a water supply device having a priority lower than that of a currently operating water supply device and being not a failed water supply device includes: and acquiring the working state of the water supply device 110 with the next priority, judging whether the water supply device 110 is in a fault state, if the water supply device with the next priority is in the fault state, skipping until the water supply device 110 which is not in the fault state is acquired, wherein the water supply device 110 which has the priority lower than that of the currently operated water supply device 110 and is not in the fault state exists. If the water supply devices 110 having the priority lower than that of the currently operating water supply device are all in the failure state, there is no water supply device 110 having the priority lower than that of the currently operating water supply device 110 and which is not a failure.

And the started water supply device enters the MPPT operation state from the stop state. When one group of water supply devices is started, the water supply device with the previous priority enters a rated maximum rotating speed/rated maximum power operation state from the MPPT operation state. When the water supply device 110 is in the last priority, the operation state thereof is not changed to the rated maximum rotation speed/rated maximum power operation state.

Further, after the water supply device with the next priority level without the fault is started, whether the water supply device with the next priority level in the non-fault state is started or not is judged; if the water supply device is started, acquiring a first operation parameter of the currently operated water supply device, and changing the working state of the currently operated water supply device according to the change of the first operation parameter; if the water supply device is not started, restarting is carried out within preset time, and in the restarting process, if the waiting time exceeds the preset time, the water supply device in the next priority level of the non-fault state is changed into the fault state; the current running water supply device keeps a rated rotating speed/power state, and a next-stage water supply device in a non-fault state is started; and if the currently operated water pump is the last non-fault water pump, the constant-pressure operation state is changed.

Further, step S1132: the method for judging whether the currently operated water supply device needs to be closed comprises the following steps: and acquiring a first operation parameter of a water supply device with a previous priority of the currently operated water supply device, and judging whether the ratio of the first operation parameter of the water supply device with the previous priority to the first preset value is smaller than a second preset value. If the current running water supply device is smaller than the second preset value, the current running water supply device is closed, and the last priority water supply device is changed into the MPPT running state from the rated rotating speed/power running state; if the current running water supply device is larger than or equal to the second preset value, the current running water supply device keeps running in the original state.

Wherein, if the water supply device 110 with the previous priority is in the fault state, the water supply device 110 with the previous priority is skipped, and the water supply device 110 with the previous priority in the operation state (usually the rated maximum rotation speed/the rated maximum power operation state) is found.

Further, when it is determined that the currently operating water supply device 110 needs to be turned off, the operating state of the currently operating water supply device 110 is changed from the MPPT operating state to the shutdown state, and the operating state of the water supply device 110 in the previous priority of the operating state is changed from the rated maximum rotation speed/the rated maximum power operating state to the MPPT operating state. When it is judged that the water supply device 110 currently operated does not need to be turned off, the operation in the MPPT mode is continued.

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

And if the currently operated water supply device is the only one group of water supply devices in the operation state, and the first operation parameter of the currently operated water pump is smaller than the third preset value, closing the currently operated water supply device.

Further, the second time interval and the third time interval may be the same as or different from the first time interval, and a person skilled in the art may set the first time interval, the second time interval, and the third time interval as needed, which is not limited in this embodiment.

FIG. 6 is a schematic view showing an electric connection configuration of a water supply system according to a second embodiment of the present invention; as shown in fig. 6, the water supply system 200 includes a plurality of water supply devices 210, a bus 220, and a power module 230. Wherein each group of the water supply devices 210 is electrically connected to the power module 230. The bus 220 is connected to each group of the water supply devices 210, and the plurality of groups of the water supply devices 210 are connected to the bus 220 in parallel.

Each set of the water supply devices 210 includes a water pump 211 and a controller 212. The water pumps 211 at least comprise water inlets 2111 and water outlets 2112, wherein the water inlets 2111 of each group of the water pumps 211 are connected to a water supply source, the water outlets 2112 of a plurality of groups of the water pumps 211 are connected to a water outlet pipe 240 in a gathering manner, and the water pumps 211 realize water supply through the water outlet pipe 240.

In this embodiment, the power module 230 provides the commercial power to each group of the water supply devices 210. FIG. 7 is a schematic diagram showing an electric connection configuration of a controller of each set of water supply apparatuses in the second embodiment of the present invention; as shown in fig. 7, 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.

The motor driving module 2122 connects the water pump 211 to the control module 2121, and the motor driving module 2122 is configured to receive a driving signal provided by the control module 2121 and drive the water pump 211 to operate in different working states according to the driving signal. The different operating states include, for example, a shutdown state, a constant-pressure operating state, a rated-power/rated-speed operating state, a fault state, etc.

The bus 220 is connected with the control module 2121 of each group of the water supply devices 210 through the bus interface 2123 of the group of the water supply devices 210, and the pressure sensor 250 on the water outlet pipe 240 is connected with the control module 2121 of the corresponding controller 212, and the controller 212 acquires the water outlet pressure value of the water outlet pipe 240 and uploads the water outlet pressure value to the bus 220 through the bus interface 2123. The bus 220 provides the outlet water pressure value uploaded by the controller 212 to the controllers 212 of the other groups of water supply devices 210 through the bus interfaces 2123 of the other groups of water supply devices 210. Besides sharing the outlet water pressure value obtained by the controller 212 of each group of the water supply devices 210, the bus 220 may also implement other information sharing among the groups of the water supply devices 210.

The water pump 211 of each set of the water supply means 210 may be operated at least in a constant pressure mode, a rated power/rated rotation speed mode. When the water pump operates in the constant pressure mode, the control module 2121 of each water supply device 210 obtains the outlet water pressure of the water outlet 2112 of the water pump 211 via the bus 220, and the control module 2121 drives the water pump 211 to operate at a constant pressure via the motor driving module 2122. When the water pump operates in the rated power/rated rotation mode, the control module 2121 drives the water pump 211 to operate at the rated power/rated rotation via the motor driving module 2122.

Further, the controller 212 of each water supply apparatus group detects a failure state of the water pump 211 connected thereto, and when it detects that the water pump connected thereto is in a failure state or when it detects that the water pump connected thereto is not in a failure state, but it finds that the water pump connected thereto is difficult to start up during the start-up process, updates the state of the water supply apparatus group 210 to a failure state, and shares the same with the controller 212 of the other water supply apparatus group 210 via the bus 220.

The power conversion module 2125 connects the power module 230 to the control module 2121, and is configured to receive a voltage provided by the power module 230 and convert the received voltage to supply power to the control module 2121.

Each group of the water supply devices 210 further comprises a human-computer interaction module 213, and the human-computer interaction module comprises a key module 2131 and a display module 2132. The controller 212 further includes a human-machine interaction interface 2124; the human-computer interaction interface 2124 is used for connecting the key module 2131 and the display module 2132 to the control module 2121.

With continued reference to fig. 6, the water supply system 200 of the present embodiment further includes a pressure sensor 250, wherein the pressure sensor 250 is located in the outlet pipe.

At least one pressure sensor 250 is arranged in the water outlet pipe 240 and used for acquiring the water outlet pressure of the water outlet pipe 240 so as to monitor the water outlet pressure of the water outlet pipe 240. In this embodiment, the water outlets 2112 of the multiple groups of water pumps 211 are collectively 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.

When one pressure sensor 250 is arranged on the water outlet pipe 240, the one pressure sensor 250 is connected to the controllers 212 of any group of water supply devices 210, the controllers 212 of the group of water supply devices 210 acquire the water outlet pressure value of the water outlet pipe 240 through the one pressure sensor 250, and the controllers 212 of the group of water supply devices 210 upload the acquired water outlet pressure value to the bus 220 to be shared by the controllers 212 of other groups of water supply devices 210 through the bus 220.

When the water outlet pipe 240 is provided with a plurality of pressure sensors 250, each pressure sensor 250 is connected to the controller 212 of a corresponding group of the water supply devices 210, the water outlet pressure value of the water outlet pipe 240 is obtained by each group of the water supply devices 210 through the corresponding pressure sensor 250, and the controller 212 of each group of the water supply devices 210 uploads the obtained water outlet pressure value to the bus, so as to share the water outlet pressure value. Further, when the pressure sensor 250 correspondingly connected to a certain group of water supply devices 210 fails, the outlet water pressure value uploaded to the bus by other groups of water supply devices 210 can be acquired through the bus interface of the group of water supply devices 210; and if all the pressure sensors 250 fail, determining that the pressure sensor 250 of the water outlet pipe 240 is in a failure state. Further, when the pressure sensor 250 is not connected or the pressure value cannot be obtained due to poor contact, it is determined that the pressure sensor 250 of the water outlet pipe 240 is faulty.

Fig. 8 is a flow chart illustrating a method of operating the water supply system according to the second embodiment of the present invention; as shown in fig. 8, the operation method of the water supply system includes the following steps.

S200: and setting the starting priority of each group of the water supply devices.

In this embodiment, a plurality of sets of the water supply devices 210 are connected in parallel to the bus 220. After each set of the water supply devices 210 is powered on, the device is in a shutdown state. And then, setting the starting priority of each group of the water supply devices 210, and when the water outlet pressure of the water outlet pipe is greater than the starting pressure value and less than the preset pressure value, sequentially starting the multiple groups of the water supply devices 210 according to the starting priority.

The method for setting the start priority of each group of the water supply devices is the same as that of the first embodiment, and the detailed description of this embodiment is omitted.

S210: and judging whether the water outlet pressure of the water supply system is greater than the starting pressure value and smaller than a preset pressure value.

In this step, a start pressure value and a preset pressure value are set via the key module 2131 of the human-computer interaction module 213. When the water pumps of all the water supply devices are stopped, the water outlet pipe has a water pressure; avoid frequently starting water supply installation because of factors such as water pipe seepage, set up a start threshold value (starting pressure value promptly) in this embodiment, work as the play water pressure of outlet pipe just starts water supply installation when reaching starting pressure value.

Further, the control module 2121 of each group of the water supply devices 210 obtains the water outlet pressure of the pressure sensor 250 on the water outlet pipe 240 at a fourth time interval, and when the water outlet pressure value of the water outlet pipe 240 is greater than the start pressure value and smaller than a preset pressure value, sequentially starts a plurality of groups of the water supply devices according to a preset priority. When the water outlet pressure is greater than or equal to the preset pressure value, the control module 2121 of each group of the water supply device 210 continues to obtain the water outlet pressure of the water outlet pipe 240 at a fourth time interval.

In this embodiment, when the water outlet pressure of the water outlet pipe 240 is greater than the starting pressure value and less than the preset pressure value, it is determined that the water outlet pressure of the water outlet pipe 240 cannot meet the water supply requirement, and at this time, the water supply system needs to be started to supply water; when the water outlet pressure of the water outlet pipe 240 is greater than or equal to a preset pressure value, it is determined that the water outlet pressure of the water outlet pipe 240 can meet the water supply requirement, at this time, the water supply system does not need to be started to supply water, the water outlet pressure of the water outlet pipe 240 is continuously obtained at a first time interval, and the water outlet pressure of the water outlet pipe 240 is monitored.

Furthermore, when the water supply system needs to be started, the multiple groups of water supply devices are started in sequence according to preset priority, and the starting number of the water supply devices is determined according to the water outlet pressure of the water outlet pipe.

And when the water outlet pressure of the water outlet pipe is equal to a preset pressure value, the finally started water supply device operates in a constant-pressure operation state.

When the water outlet pressure of the water outlet pipe is greater than the preset pressure value, closing the last started water supply device, and turning on the last started water supply device of the priority water supply device to be in constant-pressure operation; if the water outlet pressure of the water outlet pipe is reduced, the water outlet pipe is not closed, and the water supply devices are closed in sequence until the water outlet pressure is equal to the preset pressure value.

When the water outlet pressure of the water outlet pipe is larger than the starting pressure value and smaller than the preset pressure value, each group of water supply devices determines the operation state of the group of water supply devices according to the operation states of the group of water supply devices and the other groups of water supply devices.

Fig. 9 is a flowchart illustrating a method for sequentially starting a plurality of sets of water supply devices according to a preset priority according to a second embodiment of the present invention, and as shown in fig. 9, the method for sequentially starting a plurality of sets of water supply devices according to a preset priority specifically includes:

s211: the highest priority and non-failing water supply is activated.

In this step, the control module 2121 of each group of the water supply devices 210 acquires the working state of the water pump 211 of the group of the water supply devices 210 at regular time, and determines whether the acquired working state is a fault state. The operation state of the water pump 211 of each set of the water supply device 210 includes, for example, a shutdown state, a constant pressure operation state, a rated rotation speed/rated power operation state, a fault state, and the like. Further, the working state of the water pumps 211 of the group of water supply devices 210 is also provided to the control modules 2121 of the other groups of water supply devices 210 via the bus 220.

When the water outlet pressure of the water outlet pipe 240 is greater than the starting pressure value and less than the preset pressure value, determining whether the water supply device with the highest priority (for example, the water supply device with the first priority) is in a fault state; when the water supply device with the highest priority is not in a fault state, starting the water supply device with the highest priority; and when the water supply device with the highest priority is in the fault state, judging whether the water supply device with the next priority (such as the water supply device with the second priority) is in the fault state or not until the water supply device which is not in the fault state is obtained, and starting the water supply device which is not in the fault state. I.e. the highest priority water supply among the non-malfunctioning water supplies is activated.

In this embodiment, the water pump 211 of the water supply device 210 that is activated enters a constant pressure operation state from a shutdown state, and the water supply device 210 that is not activated still maintains the shutdown state.

S220: and judging whether a first operation parameter of the currently operated water supply device reaches a first preset value.

Acquiring a first operating parameter of a currently operating water supply device at a fifth time interval, and changing the working state of the currently operating water supply device according to the change of the first operating parameter, specifically, the method comprises the following steps:

s212: and judging whether the first operation parameter of the currently operated water supply device reaches a first preset value.

When the first operating parameter of the current operation reaches the first preset value, the step S2131 is executed: judging whether a non-fault water supply device with a priority lower than that of the currently operated water supply device exists; if so, starting the water supply device with the next priority in the non-fault state; if not, the water supply device which is currently operated keeps the original state to operate. When the first operation parameter of the currently operating water supply device is lower than the first preset value, the method proceeds to step S2132: and judging whether the currently operated water supply device needs to be closed or not.

In this embodiment, the first operating parameter includes a water pump rotation speed/power of each group of water supply devices; the first preset value is, for example, a 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. In the embodiment, whether the currently operating water pump meets the water supply requirement of the water outlet pipe 240 is determined by the first operating parameter (water pump speed/power) of the water supply device. Specifically, when the first operating parameter of the currently operating water supply device reaches the first preset value, it represents that the currently operating water pump cannot meet the water supply requirement of the water outlet pipe 240, and when the first operating parameter of the currently operating water supply device does not reach the first preset value, it represents that the currently operating water pump can meet the water supply requirement of the water outlet pipe 240.

Further, the method of determining whether there is a water supply device having a priority lower than that of a currently operating water supply device and being not a failed water supply device includes: and acquiring the working state of the water supply device 210 with the next priority, judging whether the water supply device is in a fault state, if the water supply device with the next priority is in the fault state, skipping until the water supply device 210 which is not in the fault state is acquired, wherein the water supply device 210 which has the priority lower than that of the currently operated water supply device 210 and is not in the fault state exists. If the water supply devices 210 having the priority lower than that of the currently operating water supply device are all in the failure state, there is no water supply device 210 having the priority lower than that of the currently operating water supply device 210 and not having the failure.

Wherein the started water supply device enters a constant pressure operation state from a shutdown state. When one group of water supply devices is started, the water supply device with the previous priority enters a rated rotating speed/rated power operation state from a constant-pressure operation state. When the water supply device 210 has the last priority, the operating state thereof is not changed to the rated rotation speed/rated power operating state, and the constant-pressure operating state is continuously maintained.

Further, after starting the water supply device with the next priority level without the fault, acquiring the working state of the water supply device with the next priority level in the non-fault state, and judging whether the water supply device is started or not; if the water supply device is started, acquiring a first operation parameter of the currently operated water supply device at a fifth time interval; if the water supply device is not started, the water supply device is restarted within the preset time, and if the waiting time exceeds the preset time, the water supply device in the next priority level in the non-fault state is changed into the fault state; the current running water supply device keeps a rated rotating speed/power state, and a next-stage water supply device in a non-fault state is started; and if the currently operated water pump is the last non-fault water pump, the constant-pressure operation state is changed.

And further, after a plurality of groups of water supply devices are sequentially started according to preset priority, the water outlet pressure of the water outlet pipe is continuously monitored, and when the water outlet pressure of the water outlet pipe is equal to a preset pressure value, the finally started water supply devices operate in a constant-pressure operation state.

In the step S2132, in the process of sequentially starting a plurality of groups of water supply devices according to a preset priority, the water outlet pressure of the water outlet pipe is continuously monitored, and whether the currently operating water supply device needs to be closed is judged by judging whether a first operation parameter of the currently operating water supply device is greater than a preset pressure value; if the first operation parameter of the currently operated water supply device is larger than the preset pressure value, closing the last started water supply device, and enabling the water supply device with the priority on the last started water supply device to be in constant-pressure operation; and if the first operation parameter of the currently operated water supply device does not reach the preset pressure value, the currently operated water supply device keeps the original state to operate.

In this embodiment, when the first operation parameter is greater than the preset pressure value, it indicates that the number of the currently-operated water supply devices exceeds the water supply requirement, so that the last-started water supply device is turned off, and resource waste caused by turning on too many water supply devices is avoided.

After the last started water supply device is closed, if the water outlet pressure of the water outlet pipe is not reduced, the water outlet pipe is closed, and all the water outlet devices are closed; if the water outlet pressure of the water outlet pipe is reduced, the water outlet pipe is not closed, and the water supply devices are closed in sequence until the water outlet pressure is equal to the preset pressure value.

And further, when the water outlet pressure of the water outlet pipe is equal to a preset pressure value, the number of the water supply devices which are operated at present is just met, and the water supply devices which are started at last are operated in a constant-pressure operation state.

Further, when the currently operating water supply device 210 needs to be turned off, the operating state of the currently operating water supply device 210 is changed from the constant pressure operating state to the stopped state, and the operating state of the water supply device 210 in the previous priority of the operating state is changed from the rated rotation speed/rated power operating state to the constant pressure operating state. When it is judged that the water supply device 210 currently operating does not need to be turned off, the constant pressure operation state is continuously maintained.

According to the water supply system control method and the water supply system, the plurality of groups of water supply devices are connected in parallel, the starting priority of each group of water supply devices is set, and when the power supply power of the power supply module reaches the starting power, the plurality of groups of water supply devices are sequentially started according to the preset priority. The starting number of the water supply devices can be controlled by the water supply system according to the power supply energy of the power module, the water supply devices with a small number are started when the power supply energy of the power module is relatively low, and the water supply devices with a large number are started when the power supply energy of the power module is relatively high. For the water supply system to multiunit water supply installation simultaneously, this embodiment has avoided when power module's power supply energy is lower effectively, and all water supply installations can't work effectively.

Furthermore, the controller of each group of water supply devices controls the working state of the controller, the controller can control the opening and closing of the controller according to the requirement, and compared with the situation that a plurality of groups of water supply devices in a master-slave control water supply system are started at the same time, the opening and closing of the water supply system provided by the embodiment of the invention are more flexible, so that the starting number of the water supply devices can be controlled according to the water supply requirement.

In a preferred embodiment, when the first operating parameter of the current operation reaches the first preset value, the power supply energy representing the power supply module meets the starting requirement of the water pump, and when the first operating parameter of the current operation water supply device does not reach the first preset value, the power supply energy representing the power supply module is insufficient. Whether the power supply energy is enough to start the water supply device with the next priority is judged through the first operation parameter (water pump rotating speed/power) of the water supply device, so that the operated water supply device is in the optimal operation state.

In a preferred embodiment, the water supply device of the next priority is started when the power supply energy of the power supply module is sufficient; and when the power supply energy of the power supply module is insufficient, judging whether the currently operated water supply device needs to be closed. According to the embodiment of the invention, when the power supply energy of the power supply module is sufficient, the power supply module drives a plurality of groups of water supply devices to operate as far as possible, and when the power supply energy of the power supply module is insufficient, the power supply module drives a limited group of water supply devices to operate, so that the solar energy received by the power supply module can be fully utilized.

While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A water supply system comprising:

a plurality of groups of water supply devices;

the water supply devices are connected to the bus in parallel; and

wherein each set of the water supply devices comprises:

a water pump; and

2. The water supply system according to claim 1, wherein the controller comprises:

a control module;

a bus interface connecting the bus to the control module.

3. The water supply system according to claim 2, wherein the controller comprises a power conversion module connecting the power supply module to the control module.

4. A water supply system according to claim 3, comprising:

the water outlets of the water supply devices in the groups are connected with the water outlet pipes in a gathering manner; and

5. The water supply system according to claim 4, wherein when one pressure sensor is provided on the water outlet pipe, the one pressure sensor is connected to the controller of any one group of water supply devices, and the controller of the group of water supply devices acquires the outlet water pressure value of the water outlet pipe via the one pressure sensor and uploads the outlet water pressure value to the bus to be shared with the controllers of other groups of water supply devices via the bus.

6. The water supply system according to claim 4, wherein when a plurality of pressure sensors are provided on the outlet pipe, each pressure sensor is connected to the controller of a corresponding group of the water supply devices, and each group of the water supply devices acquires the outlet water pressure value of the outlet pipe via the corresponding pressure sensor and uploads the outlet water pressure value to the bus to be shared with the controllers of the other groups of the water supply devices via the bus.

7. A water supply system according to claim 2 wherein the power modules are solar powered modules and the controller for each set of water supplies comprises:

a power interface connected to the power module; and

a DC-DC conversion module connecting the power interface to the control module for receiving the voltage provided by the power module via the power interface and converting the received voltage.

8. The water supply system according to claim 7, wherein the controller of each set of the water supply devices further comprises: the power sampling module 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 starting power, the plurality of groups of water supply devices are sequentially started according to preset priority.

9. The water supply system according to claim 2, wherein each set of the water supply devices further comprises a human-computer interaction module;

10. The water supply system according to claim 9, wherein the human-machine interaction module comprises a key module and a display module.

11. A control method of a water supply system including a plurality of groups of water supply devices connected in parallel to a bus, the control method comprising:

12. The control method of a water supply system according to claim 11, wherein the plurality of sets of the operation states of the water supply device include: the water supply device comprises a shutdown state, a working state, a detection state and a fault state, wherein when each group of water supply devices is in the fault state or is detected not to be in the fault state, but is difficult to start in the starting process, the state of the group of water supply devices is updated to the fault state.

13. The control method of a water supply system according to claim 12, wherein the plurality of sets of water supply devices are sequentially activated in accordance with a preset priority.

14. The control method of a water supply system according to claim 13, wherein the method of sequentially activating the plurality of water supply devices according to a preset priority comprises:

starting the water supply device with the highest priority and no fault;

15. The control method of the water supply system according to claim 14, wherein when the pressure value of the outlet water of the water supply system is greater than the starting pressure value and less than a preset pressure value, the plurality of groups of water supply devices are started in sequence according to a preset priority.

16. The control method of a water supply system according to claim 18, wherein the operation states include a constant pressure operation state and a rated rotation speed/power operation state.

17. The control method of a water supply system according to claim 16,

the started water supply device enters a constant-pressure operation state from a shutdown state;

when one group of water supply devices is closed, the water supply device with the previous priority enters a constant-pressure operation state from a rated rotating speed/rated power operation state.

18. The method for controlling a water supply system according to claim 17, wherein the water supply devices are continuously operated during the sequential activation of the plurality of groups of water supply devices according to the preset priority, and when the water supply system is activated at the preset pressure value, the last activated water supply device is operated in a constant pressure operation state.

19. The control method of the water supply system according to claim 17, wherein in the process that the plurality of groups of water supply devices are sequentially activated according to the preset priority, when the water outlet pressure of the water supply system is greater than the preset pressure value, the last activated water supply device is turned off, the water supply device of the priority on the last activated water supply device becomes a constant pressure operation, and at this time, if the water outlet pressure of the water outlet pipe is not reduced, all the water supply devices are turned off; and if the water outlet pressure of the water outlet pipe is reduced, closing the water supply devices in sequence until the water outlet pressure is equal to the preset pressure value.

20. The method of controlling a water supply system according to any one of claims 15, wherein the first operating parameter includes a water pump speed/power for each set of water supply means; the first preset value is rated rotating speed/rated power, and the rotating speed/power in the rated rotating speed/power operation state is larger than that in the constant-pressure operation state.

21. The control method of a water supply system according to claim 14, wherein the plurality of water supply devices are sequentially activated in accordance with a preset priority when the supply power reaches the activation power.

22. The method of controlling a water supply system according to claim 21, wherein the operating conditions include an MPPT operating condition and a rated speed/power operating condition.

23. The control method of a water supply system according to claim 22,

the started water supply device enters an MPPT operation state from a shutdown state;

24. The control method of a water supply system according to claim 23,

the method for judging whether the currently operated water supply device needs to be closed comprises the following steps:

and acquiring a first operation parameter of a water supply device with a previous priority of the currently operated water supply device, and judging whether the ratio of the first operation parameter of the water supply device with the previous priority to the first preset value is smaller than a second preset value.

25. The control method of a water supply system according to claim 24, wherein if the currently operating water supply apparatus is the only one set of water supply apparatuses in an operating state, the currently operating water supply apparatus is turned off when the first operating parameter of the currently operating water pump is less than the third preset value.

26. The control method of a water supply system according to claim 21, wherein the first operating parameter includes water pump speed/power for each set of water supply; the first preset value is a rated rotating speed/rated power, and the rotating speed/power of the rated rotating speed/power running state is larger than that of the MPPT running state.

27. A control method of a water supply system according to claim 26 wherein the second preset value is for example 0.9.

28. The control method of a water supply system according to claim 21, wherein when the supply power does not reach the starting power, the supply power is continuously obtained.

29. The control method of a water supply system according to claim 14, wherein the method of activating the highest priority and non-malfunctioning water supply device comprises:

30. The control method of a water supply system according to claim 14, wherein the method of judging whether to activate the water supply device of the next priority includes:

31. The method of claim 16, wherein activating the next priority water supply in the non-faulted state further comprises:

if not, restarting within preset time;