Irrigation system

Abstract

The utility model provides an irrigation system, which comprises a node control device, an irrigation device and a control device, the irrigation device is connected with the node control device and is independently controlled to be opened and closed by the connected node control device; the node control device comprises an inlet, a first outlet and a second outlet, the first outlet and the second outlet are connected with the irrigation device, the inlet is in a normally open state, when the node control device opens the first outlet, the irrigation device starts to irrigate, and after irrigation is completed, the node control device closes the first outlet and opens the second outlet. By means of the arrangement, the irrigation system independently controls opening and closing of the irrigation device through the node control device, does not need to be matched with other control structures, is simple in structure, facilitates expansion of the node control device and the irrigation device and increase of the number of irrigation nodes, is simple in control logic, and facilitates understanding and actual operation of a user.

Description

Technical Field

[0001] The present application relates to the technical field of garden irrigation, and in particular to an irrigation system. Background Art

[0002] The garden intelligent irrigation system refers to a system that uses computer technology, sensor technology and automatic control technology to achieve automatic watering, water saving and intelligent management. The current garden intelligent irrigation system is developing in the direction of intelligence, precision and environmental adaptability. Most irrigation systems sold on the market use wired or wireless methods to connect the main timer and each irrigation node. The wired connection method requires pre-burying cables near the pipeline, and waterproofing and anti-corrosion work must be done, which is costly. The wireless communication method has a limited communication distance. Due to the shielding of trees and grass at the irrigation site, the signal is attenuated, the communication performance is reduced, the reliability is poor, and in order to maintain real-time communication with the host, the energy consumption is high. Utility Model Content

[0003] In view of this, the present application provides a watering system with a simple structure, easy expansion, and simple control logic.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A watering system, comprising:

[0006] a node control device, which is in communication with the waterway;

[0007] A watering device connected to the node control device and independently controlled to open and close by the connected node control device;

[0008] The node control device includes an inlet, a first outlet connected to the watering device, and a second outlet. The inlet is in a normally open state. When the node control device opens the first outlet, the watering device starts watering. After the watering is completed, the node control device closes the first outlet and opens the second outlet.

[0009] Optionally, the irrigation system includes a plurality of node control devices connected in series, each of which is connected to the irrigation device; the plurality of node control devices include at least one first node control device and a second node control device at the end, and the plurality of node control devices connected in series independently control the irrigation devices to which they are connected in turn to complete the irrigation.

[0010] Optionally, the node control device includes a first pressure sensor, which is used to sense the water flow pressure flowing to the node control device. When the sensing value of the first pressure sensor is greater than a first preset value, the node control device controls the water flow to the irrigation device connected thereto.

[0011] Optionally, when the water supply device and the first node control device are disconnected and the water in the water path is drained, and the sensing value of the first pressure sensor of the node control device is less than an eighth preset value, the first pressure sensor closes the second outlet.

[0012] Optionally, the first node control device includes a first timer. When the measurement value of the first timer reaches a second preset value, the node control device closes the first outlet to prevent water from flowing to the irrigation device. When the measurement value of the first timer reaches a third preset value, the node control device opens the second outlet to control the water flow downstream.

[0013] Optionally, the second node control device includes a second timer. When the measurement value of the second timer reaches a second preset value, the node control device closes the first outlet to prevent water from flowing to the irrigation device. When the measurement value of the second timer reaches a fourth preset value, the second node control device opens the second outlet to control the water flow downstream.

[0014] Optionally, a main control device is further included, which is connected to the water supply device and the first first-node control device and is used to control the on / off status of the water supply device and the first first-node control device.

[0015] Optionally, in the second node control device, the second preset value is less than the fourth preset value, and when the measurement value of the first timer of the second node control device reaches the second preset value but does not reach the fourth preset value, the second node control device has a closed state to prevent water from continuing to flow;

[0016] The main control device includes a flow sensor for sensing the water flow of the main control device. In the closed state, when the sensing value of the flow sensor is less than a fifth preset value, the main control device disconnects the water supply device and the first first-node control device.

[0017] Optionally, in the second node control device, the second preset value is less than the fourth preset value, and when the measurement value of the first timer of the second node control device reaches the second preset value but does not reach the fourth preset value, the second node control device has a closed state to prevent water from continuing to flow;

[0018] The duration during which the main control device controls water to flow to the first first node control device is T3, the sum of the irrigation durations of all the irrigation devices is T4, and the difference between the second preset value and the fourth preset value is ≥T3≥T4.

[0019] Optionally, in the second node control device, the second preset value is not greater than the fourth preset value, and a flow limiter is provided downstream of the second node control device to limit the flow rate of water from the second node control device to the downstream; the main control device has a flow sensor to sense the flow rate of water in the main control device;

[0020] When the measurement value of the first timer of the second node control device reaches the second preset value and the fourth preset value and the sensing value of the flow sensor is less than the sixth preset value, the main control device disconnects the water supply device and the first first node control device.

[0021] Optionally, a drainage device is provided downstream of the second node control device, and the drainage device has a second pressure sensor for sensing the water flow pressure downstream of the second node control device;

[0022] The second pressure sensor is communicatively connected to the main control device, and when the sensing value of the second pressure sensor is greater than a seventh preset value, the water supply device and the first first node control device are disconnected.

[0023] The irrigation system provided by the present application, the node control device includes an inlet, a first outlet and a second outlet, the inlet is connected to the first outlet and the second outlet respectively, during the assembly process, the inlet of the node control device is in a normally open state and connected to the upstream waterway, the first outlet of the node control device is connected to the irrigation device, and the second outlet of the node control device is connected to the downstream waterway, so that the node control device can control the upstream waterway to flow to the irrigation device or the downstream waterway. When in use, the node control device opens the first outlet and keeps the second outlet closed, and the upstream waterway flows to the irrigation device, so that the irrigation device starts to irrigate; after the irrigation work of the irrigation device is completed, the node control device closes the first outlet and opens the second outlet, so that the upstream waterway can flow to the downstream waterway. With such a configuration, the present irrigation system independently controls the opening and closing of the irrigation device through the node control device, without the need to cooperate with other control structures, the structure is simple, and it is easy to expand the node control device and the irrigation device, increase the number of irrigation nodes, and the control logic is simple, which is easy for users to understand and actually operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 Schematic diagram of the irrigation system structure shown in some embodiments Figure 1 ;

[0026] Figure 2 Schematic diagram of the irrigation system structure shown in some embodiments Figure 2 ;

[0027] Figure 3 Schematic diagram of the irrigation system structure shown in some embodiments Figure 3 ;

[0028] Figure 4 A schematic diagram of the structure of a main control device shown in some embodiments;

[0029] Figure 5 A structural block diagram of a main control device shown in some embodiments;

[0030] Figure 6 A schematic diagram of the structure of a node control device according to some embodiments;

[0031] Figure 7 A structural block diagram of a node control device shown in some embodiments;

[0032] Figure 8 The present invention is a structural block diagram of a drainage device according to some embodiments.

[0033] In the figure: 1. Water supply device; 2. Main control device; 21. Water inlet; 22. Water outlet; 23. Display unit; 24. Main control unit; 3. Node control device; 31. Inlet; 32. First outlet; 33. Second outlet; 34. Node control unit; 35. Pin; 4. Watering device; 5. Flow limiter; 6. Drainage device; 61. Drainage inlet; 62. Drainage outlet. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] like Figure 1-Figure 8 As shown, the embodiment of the present application provides a watering system, including a node control device 3 and a watering device 4, wherein the node control device 3 is connected to the waterway, and the watering device 4 is connected to the node control device 3, and the opening and closing of the watering device 4 can be independently controlled by the node control device 3, so that the watering device 4 completes the watering action, for example, the watering device 4 is set as a shower. Since the watering action of the watering device 4 is independently controlled by the node control device 3, it does not need to cooperate with other control structures, and the control logic is simple, which is easy for users to understand and actually operate.

[0036] The node control device 3 includes an inlet 31, a first outlet 32, and a second outlet 33. The inlet 31 is connected to the first outlet 32 ​​and the second outlet 33, respectively. For example, the inlet 31 and the second outlet 33 are connected through a first passage, and the inlet 31 and the second outlet 33 are connected through a second passage, or the node control device 3 has an inner cavity, and the inlet 31, the first outlet 32, and the second outlet 33 are three openings of the inner cavity. During the assembly process, the inlet 31 of the node control device 3 is in a normally open state and connected to the upstream waterway, the first outlet 32 ​​of the node control device 3 is connected to the irrigation device 4, and the second outlet 33 of the node control device 3 is connected to the downstream waterway, so that the node control device 3 can control the upstream waterway to flow to the irrigation device 4 or the downstream waterway. When in use, the node control device 3 opens the first outlet 32 ​​and keeps the second outlet 33 closed, and the upstream waterway flows to the irrigation device 4, so that the irrigation device 4 starts irrigation; after the irrigation work of the irrigation device 4 is completed, the node control device 3 closes the first outlet 32 ​​and opens the second outlet 33, so that the upstream waterway can flow to the downstream waterway. That is, both the first outlet 32 ​​and the second outlet 33 have an open state and a closed state, and the node control device 3 can control the first outlet 32 ​​to switch between the open state and the closed state, and can control the second outlet 33 to switch between the open state and the closed state, thereby controlling the irrigation work of the irrigation device 4 by controlling the flow direction of the waterway. That is, when the node control device 3 is in the initial state, the node control device 3 controls both the first outlet 32 ​​and the second outlet 33 to be in the closed state, and when the irrigation device 4 is irrigation, the node control device 3 controls the first outlet 32 ​​to switch to the open state, and after the irrigation device 4 completes irrigation, the node control device 3 controls the first outlet 32 ​​to switch to the closed state, and controls the second outlet 33 to switch to the open state.

[0037] With such arrangement, the irrigation system independently controls the opening and closing of the irrigation device 4 through the node control device 3, without the need to coordinate with other control structures. The structure is simple, and it is convenient to expand the node control device 3 and the irrigation device 4 to increase the number of irrigation nodes. The control logic is simple, and it is easy for users to understand and actually operate.

[0038] like Figure 6 , 7As shown, in the specific scheme, the node control component includes a first valve, a second valve and a node control module. The first valve is arranged inside the node control device 3 and can adjust the conduction state of the inlet 31 and the first outlet 32. By opening the first valve, the inlet 31 and the first outlet 32 ​​can be connected, and by closing the first valve, the inlet 31 and the first outlet 32 ​​can be disconnected. For example, the first valve is arranged on the first passage between the inlet 31 and the first outlet 32, or the first valve is arranged at the position of the first outlet 32. The second valve is arranged inside the node control device 3 and can adjust the conduction state of the inlet 31 and the second outlet 33. By opening the second valve, the inlet 31 and the second outlet 33 can be connected, and by closing the second valve, the inlet 31 and the second outlet 33 can be disconnected. For example, the second valve is arranged on the second passage between the inlet 31 and the second outlet 33, or the second valve is arranged at the position of the second outlet 33. The node control module is connected in communication with the first valve and the second valve to control the opening and closing states of the first valve and the second valve according to the corresponding control logic, thereby realizing the node control device 3 to control the flow direction of the waterway.

[0039] The node control device 3 may also be provided with a pin 35 and a node control member 34, wherein the pin 35 is used to fix the device body on the ground; the node control member 34 is used to adjust the technical parameters of the node control device 3, for example, it can be set to a knob, button, etc.

[0040] In some embodiments, multiple node control devices 3 are sequentially arranged in series on the waterway, for example, two adjacent node control devices 3 are connected through a water pipe. Multiple irrigation devices 4 are also correspondingly arranged, and are respectively connected to each node control device 3, so that at least one irrigation device 4 is connected to each node control device 3, so that multiple serially connected node control devices 3 sequentially and independently control the irrigation devices 4 connected thereto to complete irrigation, which is conducive to completing irrigation actions for multiple irrigation nodes at different positions. During the watering process, the first node control device 3 is connected to the water supply device 1 (for example, set as a faucet) so that the water of the water supply device 1 flows to the first node control device 3; when the water flows to the first node control device 3, the first node control device 3 controls the first outlet 32 ​​to open, so that the water flows to the watering device 4 connected thereto; when the first watering device 4 completes watering, the first node control device 3 controls the first outlet 32 ​​to close and controls the second outlet 33 to open, so that the water flows to the next node control device 3, and the next node control device 3 and the watering device 4 complete the watering in the same way, and so on, and all the watering devices 4 complete the watering in sequence until the entire watering work cycle is completed.

[0041] In this way, since the node control device 3 is in the form of a series connection, it is convenient to increase or decrease the number of node control devices 3 according to demand. At the same time, only one node control device 3 and the corresponding connected irrigation device 4 work, so that the water pressure of each irrigation node can be kept consistent with the system water pressure, and the stability is strong. Moreover, the irrigation devices 4 connected to different node control devices 3 can also be replaced according to the actual needs of irrigation of crops. For example, the irrigation device 4 is set to a pulse shower with different functions, a swing shower, a mist shower or a drip nozzle, etc.

[0042] In some embodiments, the multiple node control devices 3 connected in series include a first node control device and a second node control device, at least one first node control device is provided, and when there are multiple first node control devices, the multiple first node control devices are sequentially provided in series. One second node control device is provided and is located downstream of the first node control device, that is, at the end of the multiple node control devices 3.

[0043] Of course, in other embodiments, only one node control device 3 may be provided, and the one node control device 3 may independently control the opening and closing of the irrigation device 4 connected thereto to complete the irrigation work.

[0044] In this solution, one or more node control devices 3 can be set. In this case, the node control device 3 includes a first pressure sensor, which is used to sense the water flow pressure flowing to the node control device 3. When the sensing value of the first pressure sensor is greater than the preset pressure value (first preset value), it means that the water flowing out of the water supply device 1 reaches the corresponding node control device 3. The node control device 3 controls the water flow to the irrigation device 4 connected thereto (at this time, the first valve is opened and the second valve is closed, so that the water flows from the inlet 31 to the first outlet 32), and irrigates the corresponding position. In this way, the water flow position in the waterway can be obtained by detecting the water pressure, and the irrigation device 4 is controlled to start the irrigation work according to the water flow position, which is conducive to the precise control of the irrigation work at the corresponding position.

[0045] After the irrigation work is completed, the water supply device 1 and the first node control device 3 are disconnected, the water in the waterway is discharged, and the water pressure in the waterway will drop accordingly. When the sensing value of the first pressure sensor of the node control device 3 is less than the preset pressure value (the eighth preset value, such as 4PS I), the node control device 3 stops the water flow according to the sensing value of the first pressure sensor. At this time, the node control device 3 controls the second valve to close to close the second outlet 33, thereby returning the node control device 3 to the initial state. In this way, it is beneficial for the irrigation system to complete multiple repeated cycles without manual control, and the automation level is high.

[0046] The following is an explanation of a solution in which a plurality of node control devices 3 are arranged in series.

[0047] The first node control device includes a first timer, which can be used to measure the duration of water flowing from the first node control device to the connected irrigation device 4, and can also be used to measure the duration of the first node control device opening the first outlet 32. When the measurement value of the first timer reaches the preset duration (the second preset value), it means that the irrigation device 4 at the corresponding position has completed irrigation, and the first node control device closes the first outlet 32 ​​(closes the first valve) to prevent water from flowing to the irrigation device 4, thereby ending the irrigation work of the irrigation device 4 at the corresponding position. When the measurement value of the first timer reaches another preset duration (the third preset value), the first node control device opens the second outlet 33 (that is, opens the second valve) to allow water to flow to the downstream first node control device or the second node control device. In this way, the start and end of the irrigation work of the irrigation device 4 can be controlled by the timing of the first timer, which is conducive to the precise control of the irrigation work duration of the corresponding position.

[0048] The second node control device includes a second timer, which can be used to measure the duration of water flowing from the second node control device to the connected irrigation device 4, and can also be used to measure the duration of the second node control device opening the first outlet 32. When the measurement value of the second timer reaches the preset duration (the second preset value), it means that the irrigation device 4 connected to the second node control device has completed irrigation, and the second node control device closes the first outlet 32 ​​(closes the first valve) to prevent water from flowing to the irrigation device 4, thereby ending the irrigation work of the irrigation device 4. When the measurement value of the second timer reaches another preset duration (the fourth preset value), the second node control device opens the second outlet 33 (that is, opens the second valve) to allow water to flow downstream. In this way, through the timing of the second timer, the start and end of the irrigation work of the irrigation device 4 at the end can be controlled, which is conducive to the precise control of the duration of the irrigation work at the end.

[0049] It should be noted that the duration of the irrigation work completed by the node control device 3 and the irrigation device 4 at different positions can be the same or different. For different irrigation situations, the preset durations (second preset values ​​and third preset values) corresponding to different first timers can be different, and the second preset values ​​of the first timer and the second timer can be different. Among them, in the first node control device, the second preset value needs to be less than or equal to the third preset value, so that the first node control device opens the second outlet 33 after closing the first outlet 32, or opens the second outlet 33 while closing the first outlet 32, so as to ensure the stability of the irrigation of the irrigation device 4. Correspondingly, in the second node control device, the second preset value needs to be less than or equal to the fourth preset value, so that the second node control device opens the second outlet 33 after closing the first outlet 32, or opens the second outlet 33 while closing the first outlet 32. Of course, in certain circumstances, the second preset value may be greater than the third preset value, and the second preset value may also be greater than the fourth preset value.

[0050] In some embodiments, the irrigation system further includes a main control device 2, which is connected to a water supply device 1 (for example, a faucet) and a first first node control device, so that the main control device 2 can control the on / off state of the water supply device 1 and the first first node control device through its own on / off state. In this way, by controlling the main control device 2, the water supply of multiple node control devices 3 can be controlled, which is conducive to realizing automatic regulation.

[0051] like Figure 4 , 5 As shown, in a specific scheme, the main control device 2 has a water inlet 21, a water outlet 22, a water outlet valve and a main control module. The water inlet 21 is connected to the water outlet 22, the water inlet 21 is connected to the water supply device 1, and the water outlet 22 is connected to the first first node control device. The water outlet valve is arranged between the water inlet 21 and the water outlet 22, or the water outlet valve is arranged at the water inlet 21 or the water outlet 22. The main control module is connected to the water outlet valve to control the on and off of the water outlet valve, thereby controlling the on and off of the water inlet 21 and the water outlet 22.

[0052] The main control device 2 is also provided with a display element 23 and a main operating element. The display element 23 can be set as a display screen for displaying the technical parameters of the main control device 2, and the main operating element 24 can be set as a knob or button for adjusting the technical parameters of the main control device 2.

[0053] In the first preferred solution, the second preset value preset in the second node control device is less than the fourth preset value. When the measurement value of the first timer of the second node control device reaches the second preset value but does not reach the fourth preset value, the second node control device closes the second outlet 33 but does not open the second outlet 33 (at this time, both the first valve and the second valve are closed), and the second node control device is in a closed state to prevent the water from continuing to flow (neither to the irrigation device 4 nor to the downstream), thereby stopping the water in the waterway from flowing, that is, the water flow rate is reduced to zero. In this way, after the last irrigation device 4 completes irrigation, the second node control device can stop the water from flowing, and can prevent the water from being discharged from the second node control device to the downstream.

[0054] The main control device 2 includes a flow sensor, which is used to sense the flow rate of water flowing through the main control device 2. For example, the flow sensor is arranged on the water inlet 21 or the water outlet 22 of the main control device 2 or on the passage between the water inlet 21 and the water outlet 22. When irrigation is not completed, water will be sprayed out by the irrigation device 4, and the water will flow through the main control device 2 continuously, so that there is a certain flow rate inside the main control device 2. At this time, the main control device 2 keeps its own water outlet valve open to connect the water supply device 1 with the first first node control device; when irrigation is completed and the second node control device is in a closed state, there is no water flow in each node control device 3, and the flow rate inside the main control device 2 is zero or close to zero. At this time, the sensing value of the flow sensor is less than the preset flow value (i.e., the fifth preset value), and the main control device 2 controls its own water outlet valve to close, so that the water supply device 1 is disconnected from the first first node control device.

[0055] In this way, the main control device 2 obtains the closed state of the second node control device by sensing the water flow rate, and then controls the disconnection of the water supply device 1 and the first first node control device. No lines or wireless connections are required, the structure is simple, and it is easy to control.

[0056] Among them, the difference between the second preset value and the fourth preset value is T1, that is, after closing the first outlet 32, the second node control device delays for T1 and then opens the second outlet 33. When the flow sensor of the main control device 2 detects that the water flow rate is less than the preset flow rate (the fifth preset value) for a duration of T2, the water supply device 1 is disconnected from the first first node control device, where T1≥T2. After the last irrigation device 4 completes the irrigation, the second node control device first closes the first valve, and opens the second valve after a delay of 2 minutes (that is, T1 is set to 2 minutes) to gradually make the water in the waterway pipeline static. Since the main control device 2 is provided with a flow sensor, when the flow sensor senses that the flow in the waterway pipeline is zero (that is, the sensing value is less than the fifth preset value), the entire irrigation operation has been completed. The main control device 2 will pre-set the following program. If the flow in the waterway pipeline is zero for more than 1 minute (that is, T2 is set to 1 minute), the outlet valve of the main control device 2 is closed to cut off the water supply. One minute after the water supply is cut off, the second valve of the second node control device opens, the water flow in the water pipeline will be unloaded, and the system will be reset.

[0057] In the second preferred solution, the difference from the first preferred solution is that the main control device 2 is not provided with a flow sensor, and the difference between the second preset value and the fourth preset value is T1, that is, after the second node control device closes the first outlet 32, it delays T1 for a period of time before opening the second outlet 33. Among them, the time duration for the main control device 2 to control the water flow to the first node control device 3 is T3, and the sum of the watering time of all the irrigation devices 4 is T4, T1≥T3≥T4. After the last irrigation device 4 completes the irrigation, the second node control device first closes the first valve, and opens the second valve after a long delay (i.e. T1), for example, T1 is set to 12 hours, T3 is 3 hours, and T4 is 1 hour. Since the general household garden system only needs to be irrigated once a day, after the main control device 2 closes the water outlet valve, the second node control device delays opening the second valve again, so that the water flow in the waterway pipe will be unloaded and the system will be reset.

[0058] In the third preferred embodiment, Figure 2As shown, a flow limiter 5 is provided downstream of the second node control device to limit the flow rate of water flowing downstream from the last node control device 3. For example, the flow limiter 5 can be provided as a plug with a small hole. The main control device 2 includes a flow sensor, which is used to sense the flow rate of water flowing through the main control device 2. For example, the flow sensor is provided on the water inlet 21 or the water outlet 22 of the main control device 2 or on the passage between the water inlet 21 and the water outlet 22. Among them, the second preset value in the second node control device is less than or equal to the fourth preset value. When the measurement value of the first timer of the second node control device reaches the second preset value or the fourth preset value, the second node control device controls the water to flow to the flow limiter 5 (at this time, the first valve is closed and the second valve is opened), and the flow limiter 5 starts to drain water. Since the drainage flow rate of the flow limiter 5 is much smaller than the flow rate during normal irrigation, the flow rate of the waterway and the main control device 2 is greatly reduced. When the sensing value of the flow sensor is lower than the preset minimum flow threshold (the sixth preset value), the main control device 2 controls its own water outlet valve to close so that the water supply device 1 is disconnected from the first node control device 3. After that, the flow limiter 5 continues to drain water until the pressure drops to the reset preset value of each node control device 3, completing the system reset. In this way, by continuing to drain water through the flow limiter 5, high pressure in the water channel can be prevented from affecting the use of pipelines and components.

[0059] In the fourth preferred embodiment, Figure 3 As shown, a drainage device 6 is connected to the downstream of the second node control device, and a second pressure sensor is arranged in the drainage device 6, and the second pressure sensor is used to sense the water flow pressure downstream of the second node control device. Among them, the second pressure sensor is connected to the main control device 2 in communication, for example, wirelessly or wired. When the second pressure sensor senses that the water flow pressure is greater than the preset pressure (i.e., the seventh preset value), it means that the second node control device and the irrigation device 4 have completed the irrigation work, that is, the entire irrigation system has completed the irrigation work. At this time, the main control device 2 controls its own water outlet valve to close, so that the water supply device 1 is disconnected from the first node control device 3. In this way, through the design of the drainage device 6, the second pressure sensor can be placed outside the second node control device, saving the volume of the second node control device, and the specifications of the first node control device and the second node control device can be consistent, which is convenient for assembly with the same specifications.

[0060] In the specific scheme, the drainage device 6 is provided with a drainage control module, a first communication module, a second pressure sensor, a drainage valve, a drainage inlet 6131 and a drainage outlet 62, and the drainage valve, the first communication module and the second pressure sensor are all connected to the drainage control module. At the same time, the main control device 2 is provided with a second communication module, and the first communication module is interconnected with the second communication module, so that the signal on the second pressure sensor can be transmitted to the main control device 2, and then the main control device 2 can control the water outlet valve to close according to the sensing value of the second pressure sensor.

[0061] Of course, the drainage device 6 includes a third timer, and the drainage valve is arranged between the drainage inlet 6131 and the drainage outlet 62, preferably at the position of the drainage outlet 62. The drainage valve controls the drainage state of the drainage device 6, and the third timer is used to measure the time length of the water flow to the drainage device 6. When the second node control device controls the water flow to the drainage device 6, the drainage valve in the drainage device 6 is closed so that the second pressure sensor can better sense the water flow pressure. When the third timer completes the timing, the drainage valve is opened to drain the water in the drainage device 6. During the timing of the third timer, the main control device 2 controls its own water outlet valve to close so that the water supply device 1 is disconnected from the first first node control device.

[0062] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0063] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0064] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0065] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0066] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0067] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A watering system, characterized in that: include: a node control device, which is in communication with the waterway; A watering device connected to the node control device and independently controlled to open and close by the connected node control device; The node control device includes an inlet, a first outlet connected to the watering device, and a second outlet. The inlet is in a normally open state. When the node control device opens the first outlet, the watering device starts watering. After the watering is completed, the node control device closes the first outlet and opens the second outlet.

2. The irrigation system according to claim 1, characterized in that: The irrigation system includes a plurality of node control devices connected in series, each of which is connected to the irrigation device; the plurality of node control devices include at least one first node control device and a second node control device at the end, and the plurality of node control devices connected in series independently control the irrigation devices connected thereto in turn to complete the irrigation.

3. The irrigation system according to claim 1 or 2, characterized in that: The node control device includes a first pressure sensor, which is used to sense the water flow pressure flowing to the node control device. When the sensing value of the first pressure sensor is greater than a first preset value, the node control device controls water to flow to the irrigation device connected thereto.

4. The irrigation system according to claim 3, characterized in that: When the water supply device and the first node control device are disconnected and the water in the water path is drained, and the sensing value of the first pressure sensor of the node control device is less than the eighth preset value, the first pressure sensor closes the second outlet.

5. The irrigation system according to claim 2, characterized in that: The first node control device includes a first timer. When the measurement value of the first timer reaches a second preset value, the node control device closes the first outlet to prevent water from flowing to the irrigation device. When the measurement value of the first timer reaches a third preset value, the node control device opens the second outlet to control the water flow downstream.

6. The irrigation system according to claim 5, characterized in that: The second node control device includes a second timer. When the measurement value of the second timer reaches a second preset value, the node control device closes the first outlet to prevent water from flowing to the irrigation device. When the measurement value of the second timer reaches a fourth preset value, the second node control device opens the second outlet to control the water flow downstream.

7. The irrigation system according to claim 6, characterized in that: It also includes a main control device, which is connected to the water supply device and the first first-node control device and is used to control the on and off states of the water supply device and the first first-node control device.

8. The irrigation system according to claim 7, characterized in that: In the second node control device, the second preset value is less than the fourth preset value, and when the measurement value of the first timer of the second node control device reaches the second preset value but does not reach the fourth preset value, the second node control device has a closed state to prevent water from continuing to flow; The main control device includes a flow sensor for sensing the water flow of the main control device. In the closed state, when the sensing value of the flow sensor is less than a fifth preset value, the main control device disconnects the water supply device and the first first-node control device.

9. The irrigation system according to claim 7, characterized in that: In the second node control device, the second preset value is less than the fourth preset value, and when the measurement value of the first timer of the second node control device reaches the second preset value but does not reach the fourth preset value, the second node control device has a closed state to prevent water from continuing to flow; The duration during which the main control device controls water to flow to the first first node control device is T3, the sum of the irrigation durations of all the irrigation devices is T4, and the difference between the second preset value and the fourth preset value is ≥T3≥T4.

10. The irrigation system according to claim 7, characterized in that: In the second node control device, the second preset value is not greater than the fourth preset value, and a flow limiter is provided downstream of the second node control device to limit the flow rate of water from the second node control device to the downstream; the main control device has a flow sensor to sense the flow rate of water in the main control device; When the measurement value of the first timer of the second node control device reaches the second preset value and / or the fourth preset value and the sensing value of the flow sensor is less than the sixth preset value, the main control device disconnects the water supply device and the first first node control device.

11. The irrigation system according to claim 7, characterized in that: A drainage device is provided downstream of the second node control device, and the drainage device has a second pressure sensor for sensing the water flow pressure downstream of the second node control device; The second pressure sensor is communicatively connected to the main control device, and when the sensing value of the second pressure sensor is greater than a seventh preset value, the water supply device and the first first node control device are disconnected.

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