A rainwater collection device

Abstract

The invention discloses a rainwater collection device, comprising a primary water filter barrel, a clean water collection barrel and a sewage collection barrel, wherein a first accommodating chamber for accommodating primary water is provided in the primary water filter barrel, a second accommodating chamber for accommodating clean water is provided in the clean water collection barrel, a third accommodating chamber for accommodating sewage is provided in the sewage collection barrel, a first water inlet connected to the ground is provided on the upper end surface of the primary water filter barrel, a primary water filtering layered structure is provided in the first accommodating chamber, a first water outlet is provided on the inner side wall of the upper end of the first accommodating chamber, the first water outlet is connected to the inner side wall of the second accommodating chamber through a first water outlet device, a second water outlet for sewage discharge is provided on the inner side wall of the lower end of the first accommodating chamber, the second water outlet is connected to the inner side wall of the third accommodating chamber through the second water outlet device, a cleaning device for cleaning the third accommodating chamber is provided in the third accommodating chamber, a third water outlet is also provided on the upper end surface of the third accommodating chamber, the third water outlet is connected to the inner side wall of the first accommodating chamber through the third water outlet device.

Description

Technical Field

[0001] The invention relates to the technical field of rainwater collection, and in particular to a rainwater collection device. Background Art

[0002] The rainwater collection system refers to the entire process of rainwater collection, which can be divided into five major links, namely, collecting rainwater through rainwater collection pipes - discarding and intercepting sewage - storing rainwater in PP rainwater collection pools - filtering and disinfecting - purification and reuse. The collected rainwater is used to irrigate crops, replenish groundwater, and can also be used for non-domestic water purposes such as landscape environment, greening, car wash water, road washing cooling water replenishment, and toilet flushing. It can save water resources and greatly alleviate my country's water shortage problem.

[0003] The current rainwater purification system is rather cumbersome to operate, and cannot achieve a good overall purification effect. In addition, the related switch control is not intelligent enough, which will affect people's usage experience.

[0004] In the prior art, there is a kind of rainwater collection device that is directly buried in the ground, but in the existing market, such rainwater collection devices can generally only collect clean water, but cannot intelligently remove the filtered sewage; therefore, the rainwater collection device in the prior art will reduce the purity of the collected rainwater after a long period of rainwater collection.

[0005] In this technical solution, the first water pump and the third water pump are both of the brand Langseg, and the model is HL80-23 water pump; they belong to the existing technology, so they are not elaborated in detail in this technical solution.

[0006] In this technical solution, the second water pump brand is Shanghai Bede, and the model is 25WQD3-7-0.25S sewage pump; it belongs to the existing technology, so it is not elaborated in this technical solution.

[0007] In the present technical solution, the first contact switch, the second contact switch and the third contact switch are all contact switches of Taiwan Zhaosheng Switch ZSENSWITC; they belong to the prior art and are therefore not specifically described in the present technical solution.

[0008] In the present technical solution, the first water flow sensing device, the second water flow sensing device and the third water flow sensing device are water sensing switches of model SW08; they belong to the prior art and are therefore not specifically described in the present technical solution.

[0009] The initial water of rainwater refers to: in the initial stage of rainfall, rainwater dissolves a large amount of acidic gases, automobile exhaust, factory exhaust and other polluting gases in the air. After falling to the ground, it washes roofs, asphalt concrete roads, etc., making the early rainwater contain a large amount of pollutants. The pollution level of the early rainwater is relatively high, even exceeding the pollution level of ordinary urban sewage; therefore, this type of rainwater needs to be removed when collecting rainwater. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a rainwater collection device which can autonomously clean the sewage in the sewage collection barrel and effectively filter the primary water.

[0011] The technical solution adopted by the present invention to solve the above-mentioned problem is: a rainwater collection device, including a primary water filter barrel, a clean water collection barrel and a sewage collection barrel, the primary water filter barrel is provided with a first accommodating chamber for accommodating primary water, the clean water collection barrel is provided with a second accommodating chamber for accommodating clean water, the sewage collection barrel is provided with a third accommodating chamber for accommodating sewage, the upper end surface of the primary water filter barrel is provided with a first water inlet connected to the ground, the first accommodating chamber is provided with a primary water filtering layered structure, the upper inner side wall of the first accommodating chamber is provided with a first water outlet, the first water outlet is connected to the inner side wall of the second accommodating chamber through a first water outlet device, the lower inner side wall of the first accommodating chamber is provided with a second water outlet for sewage discharge, the second water outlet is connected to the inner side wall of the third accommodating chamber through a second water outlet device, the third accommodating chamber is provided with a cleaning device for cleaning the third accommodating chamber, the upper end surface of the third accommodating chamber is also provided with a third water outlet, the third water outlet is connected to the inner side wall of the first accommodating chamber through the third water outlet device.

[0012] After adopting the above structure, the present invention has the following advantages compared with the existing structure:

[0013] The rainwater collection device of the present invention is more intelligent and automated than the rainwater collection device in the prior art. The water pump and the motor in the rainwater collector are driven to work automatically through automatic detection between the switches, thereby completing the full automation of the entire rainwater collection process. At the same time, compared with the rainwater collection device in the prior art, the sewage collection barrel in the present technical solution is also equipped with a cleaning device that can self-clean the sewage collection barrel.

[0014] As a preferred embodiment: a discharge port connected to the third accommodating chamber is provided at the center of the upper end surface of the sewage collecting barrel, a cleaning device capable of removing sludge at the bottom of the third accommodating chamber is rotatably connected to the third accommodating chamber, the cleaning device comprises a first motor arranged at the bottom of the sewage collecting barrel, the first motor is rotatably connected to a first rotating shaft on a side close to the sewage collecting barrel, a first through hole for allowing the first rotating shaft to extend into the third accommodating chamber is provided at the lower end of the sewage collecting barrel, the first rotating shaft extends to the discharge port away from one end of the first motor, a threaded turntable is provided on the outer side wall of the first rotating shaft for clearing sludge in the third accommodating chamber out of the third accommodating chamber, and a control device capable of controlling the rotation of the first motor is provided on the inner side wall of the upper end of the third accommodating chamber.

[0015] As a preferred embodiment: the control device is a first contact switch, the first contact switch is electrically connected to the first motor, the discharge port is away from one end of the third accommodating chamber and extends out of the ground through the first discharge pipe, the upper end of the first rotating shaft extends along the first discharge pipe to be flush with the ground, and the end of the first discharge pipe extending out of the ground is detachably and rotatably connected to an end cover.

[0016] As a preferred embodiment: the primary water filtration layered structure includes a first baffle plate horizontally arranged in the first accommodating chamber, the outer side wall of the first baffle plate is integrally formed with the inner side wall of the first accommodating chamber, a second through hole is provided in the center of the first baffle plate for water to pass through, a second baffle plate is provided below the second through hole, the outer side wall of the second baffle plate is circumferentially connected to the lower end surface of the first baffle plate by an elastic line, a second contact switch is provided on the lower end surface of the first baffle plate, the second contact switch is located directly above the second baffle plate, and a gap is left between the upper end surface of the second baffle plate and the lower end surface of the first baffle plate for water to flow from the upper end of the first accommodating chamber to the lower end of the first accommodating chamber.

[0017] As a preferred embodiment: the first water outlet device includes a first water pipe connecting the first water outlet and the inner side wall of the second accommodating chamber, a first water pump is arranged in the first water pipe, a water sensing device is arranged on the inner side wall of the upper end of the first accommodating chamber, the water sensing device is electrically connected to the first water pump, a first water flow sensing device is arranged on the inner side wall of one end of the first water pipe near the first water outlet, the first water flow sensing device is electrically connected to the second water pump, and a first filter is directly arranged on the first water outlet and the first water pipe.

[0018] As a preferred embodiment: the second water outlet device includes a second water pipe connecting the second water outlet and the inner wall of the third accommodating chamber, a second water pump is provided in the second water pipe, a third water flow sensing device is provided on the inner wall of one end of the second water pipe near the second water outlet, and the third water flow sensing device is electrically connected to the second water pump.

[0019] As a preferred embodiment: the third water outlet device includes a third water pipe connecting the third water outlet and the inner top surface of the first accommodating chamber, the third water outlet is provided with a third water pump in the third water pipe, the inner wall of the third water pipe close to the third water outlet is provided with a second water flow sensing device, the second water flow sensing device is electrically connected to the third water pump, and a third filter is provided at the connection between the third water outlet and the third water pipe.

[0020] As a preferred embodiment, a third contact switch is provided on the inner wall of the first accommodating chamber below the first baffle and above the second water outlet, and the third contact switch is electrically connected to the second water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a rainwater collection device of the present invention.

[0022] In the figure, 1, primary water filter barrel, 2, clean water collection barrel, 3, sewage collection barrel, 4, primary water filtration layered structure, 5, cleaning device, 11, first accommodating chamber, 12, first water inlet, 13, first water outlet, 14, first water outlet device, 15, second water outlet, 16, second water outlet device, 17, third contact switch, 21, second accommodating chamber, 31, third accommodating chamber, 32, third water outlet, 33, third water outlet device, 34, discharge port, 35, first through hole, 36, first discharge pipe, 37, end cover, 41, first baffle, 4 2. second through hole, 43. second baffle, 44. elastic line, 45. second contact switch, 51. first motor, 52. first rotating shaft, 53. threaded turntable, 54. control device, 55. first contact switch, 141. first water pipe, 142. first water pump, 143. first water flow sensing device, 144. first filter, 161. second water pipe, 162. second water pump, 163. third water flow sensing device, 331. third water pipe, 332. third water pump, 333. second water flow sensing device, 334. third filter. DETAILED DESCRIPTION

[0023] A specific implementation of the present invention is described below with reference to the accompanying drawings.

[0024] Example 1: See Figure 1 The rainwater collecting device in the technical solution is buried deep under the ground, and the first water inlet is flush with the ground away from one end of the primary water filter barrel. Therefore, when it rains, rainwater will flow along the ground through the first water inlet into the first accommodating chamber in the primary water filter barrel. The rainwater flowing into the first accommodating chamber will first flow to the first baffle. Since the center of the first baffle is provided with a first through hole for the primary water to flow into the lower end of the first accommodating chamber, the rainwater will pass through the first through hole and flow into the lower end of the first accommodating chamber; when the rainwater accumulates continuously in the first accommodating chamber, the level of the rainwater will continue to rise until the level of the rainwater touches the lower end surface of the second baffle; at this time, when the level of the rainwater continues to rise, the second baffle will rise with the continuous rise of the water surface until the second baffle rises to abut against the lower end surface of the first baffle, and the second baffle will touch the second contact switch.

[0025] At this time, the second contact switch will transmit a signal to the first water pump and put the first water pump in a standby state. At this time, the initial water filtration state of the rainwater has been completed, and the initial water in the rainwater has been filtered. At this time, with continuous precipitation, the rainwater will accumulate in the cavity above the first baffle in the first accommodating chamber. When the water surface of the rainwater accumulates in the space above the first baffle and overflows the first water inlet and touches the water sensing device, the water sensing device drives the first water pump to start working, and the rainwater above the first baffle will flow through the first filter net and the first water pipe under the extraction of the first water pump and enter the second accommodating chamber in the clean water collection barrel.

[0026] When the first water pump draws rainwater from the first accommodating chamber to a level lower than the first water outlet, the first water flow sensing switch on the inner wall of the first water outlet pipe will detect that the water flow has stopped. At this time, the first water flow sensing switch will drive the second water pump to start working. At this time, the initial water under the first baffle in the first accommodating chamber will enter the third accommodating chamber in the sewage collection barrel under the pumping of the second water pump; when the third water flow sensing device in the second water pipe detects that there is no liquid in the second water pipe sucked into the second water pump, the second water pump stops working.

[0027] In the long-term rainwater collection process, the rainwater collection device will inevitably have the phenomenon of impurities, dust or silt accumulation, which will greatly affect the overall water quality of the rainwater collection; the existing rainwater collection devices do not have a good structure to remove such impurities; and the rainwater collection device in the present technical solution is equipped with such a cleaning device.

[0028] In the present technical solution, a third contact switch is also provided on the inner side wall of the first accommodating chamber below the first baffle, and the third contact switch is electrically connected to the second water pump; that is, when the sludge in the first accommodating chamber accumulates to a certain amount, the sludge will be squeezed to the third contact switch, and the third contact switch will drive the second water pump below the third contact switch to extract the sludge in the first accommodating chamber. When the sludge entering the third accommodating chamber accumulates to a certain amount, the sludge in the third accommodating chamber will touch the first contact switch, and the first contact switch is electrically connected to the first motor. Therefore, when the first contact switch is touched, the first motor starts to drive the first rotating shaft to rotate circumferentially, and the circumferential rotation of the first rotating shaft will drive the threaded turntable on the outer side wall of the first rotating shaft, thereby discharging the sludge in the first accommodating chamber from the discharge pipe to the ground.

[0029] A third water outlet is also provided on the bottom surface of the third accommodating chamber. The main function of the design of the third water outlet is that when the surface of the rainwater accumulated in the third accommodating chamber is against the top surface of the third accommodating chamber, if rainwater continues to be injected into the third accommodating chamber, the rainwater in the third accommodating chamber will flow into the third water pipe. When the rainwater touches the second water flow sensing device in the third water pipe, the second water flow sensing device will drive the third water pump to re-pump the rainwater in the third accommodating chamber into the first accommodating chamber, and filter it through the first accommodating chamber again; the cycle is repeated in sequence.

[0030] In the technical solution, the outer side wall of the clean water collection barrel is connected to the water spraying device on the bottom surface through a water outlet pipe, thereby completing the process of utilizing the clean water in the clean water collection barrel.

[0031] See also Figure 1The technical solution adopted by the present invention to solve the above problems is: a rainwater collection device, including a primary water filter barrel 1, a clean water collection barrel 2 and a sewage collection barrel 3, the primary water filter barrel 1 is provided with a first accommodating chamber 11 for accommodating primary water, the clean water collection barrel 2 is provided with a second accommodating chamber 21 for accommodating clean water, the sewage collection barrel 3 is provided with a third accommodating chamber 31 for accommodating sewage, the upper end surface of the primary water filter barrel 1 is provided with a first water inlet 12 connected to the ground, the first accommodating chamber 11 is provided with a primary water filtering layered structure 4, and the upper inner wall of the first accommodating chamber 11 A first water outlet 13 is provided, and the first water outlet 13 is connected to the inner wall of the second accommodating chamber 21 through a first water outlet device 14. A second water outlet 15 for sewage discharge is provided on the inner wall of the lower end of the first accommodating chamber 11. The second water outlet 15 is connected to the inner wall of the third accommodating chamber 31 through a second water outlet device 16. A cleaning device 5 for cleaning the third accommodating chamber 31 is provided in the third accommodating chamber 31. A third water outlet 32 ​​is also provided on the upper end surface of the third accommodating chamber 31, and the third water outlet 32 ​​is connected to the inner wall of the first accommodating chamber 11 through a third water outlet device 33.

[0032] After adopting the above structure, the present invention has the following advantages compared with the existing structure:

[0033] The rainwater collection device of the present invention is more intelligent and automated than the rainwater collection device in the prior art. The water pump and the motor in the rainwater collector are driven to work automatically through automatic detection between the switches, thereby completing the full automation of the entire rainwater collection process. At the same time, compared with the rainwater collection device in the prior art, the sewage collection barrel in the present technical solution is also equipped with a cleaning device that can self-clean the sewage collection barrel.

[0034] As a preferred embodiment: a discharge port 34 connected to the third accommodating chamber 31 is provided at the center of the upper end surface of the sewage collecting barrel 3, and a cleaning device 5 is rotatably connected in the third accommodating chamber 31 for removing the sludge in the third accommodating chamber 31. The cleaning device 5 includes a first motor 51 arranged at the bottom of the sewage collecting barrel 3, and the first motor 51 is rotatably connected to a first rotating shaft 52 on a side close to the sewage collecting barrel 3. A first through hole 35 is provided at the lower end of the sewage collecting barrel 3 for allowing the first rotating shaft 52 to extend into the third accommodating chamber 31, and the first rotating shaft 52 extends to the discharge port 34 away from one end of the first motor 51. A threaded turntable 53 is provided on the outer side wall of the first rotating shaft 52 for clearing the sludge in the third accommodating chamber 31 out of the third accommodating chamber 31, and a control device 54 for controlling the rotation of the first motor 51 is provided on the inner side wall of the upper end of the third accommodating chamber 31.

[0035] As a preferred embodiment: the control device 54 is a first contact switch 55, the first contact switch 55 is electrically connected to the first motor 51, the discharge port 34 extends out of the ground through the first discharge pipe 36 at one end away from the third accommodating chamber 31, the upper end of the first rotating shaft 52 extends along the first discharge pipe 36 to be flush with the ground, the first discharge pipe 36 extends out of the ground at one end and is detachably and rotatably connected to the end cover 37, the first contact switch 55 is fixedly connected to the inner wall of the third accommodating chamber 31, and the first contact switch 55 is located below the third water outlet 32.

[0036] As a preferred embodiment: the primary water filtration layered structure 4 includes a first baffle plate 41 horizontally arranged in the first accommodating chamber 11, the outer wall of the first baffle plate 41 is integrally formed with the inner wall of the first accommodating chamber 11, a second through hole 42 is provided in the center of the first baffle plate 41 for water to pass through, a second baffle plate 43 is provided below the second through hole 42, the outer wall of the second baffle plate 43 is circumferentially connected to the lower end surface of the first baffle plate 41 through an elastic line 44, a second contact switch 45 is provided on the lower end surface of the first baffle plate 41, and the second contact switch 45 is located directly above the second baffle plate 43, and a gap is left between the upper end surface of the second baffle plate 43 and the lower end surface of the first baffle plate 41 for water to flow from the upper end of the first accommodating chamber 11 to the lower end of the first accommodating chamber 11.

[0037] As a preferred embodiment: the second water outlet device 16 includes a second water pipe 161 connecting the second water outlet 15 and the inner wall of the third accommodating chamber 31, a second water pump 162 is provided in the second water pipe 161, and a third water flow sensing device 163 is provided on the inner wall of one end of the second water pipe 161 close to the second water outlet 15, and the third water flow sensing device 163 is electrically connected to the second water pump 162.

[0038] As a preferred embodiment: the first water outlet device 14 includes a first water pipe 141 connecting the first water outlet 13 and the inner wall of the second accommodating chamber 21, a first water pump 142 is provided in the first water pipe 141, a water sensing device 18 is provided on the inner wall of the upper end of the first accommodating chamber 11, the water sensing device 18 is electrically connected to the first water pump 142, a first water flow sensing device 143 is provided on the inner wall of one end of the first water pipe 141 close to the first water outlet 13, the first water flow sensing device 143 is electrically connected to the second water pump 162, and a first filter screen 144 is directly provided between the first water outlet 13 and the first water pipe 141.

[0039] As a preferred embodiment: the third water outlet device 33 includes a third water pipe 331 connecting the third water outlet 32 ​​and the inner top surface of the first accommodating chamber 11, a third water pump 332 is provided in the third water pipe 331, and a second water flow sensing device 333 is provided on the inner wall of the third water pipe 331 close to the third water outlet 32. The second water flow sensing device 333 is electrically connected to the third water pump 332, and a third filter net 334 is provided at the connection between the third water outlet 32 ​​and the third water pipe 331.

[0040] As a preferred embodiment, a third contact switch 17 is provided on the inner wall of the first accommodating chamber 11 below the first baffle 41 and above the second water outlet 15 , and the third contact switch 17 is electrically connected to the second water pump 162 .

Claims

1. A rainwater collection device, comprising a primary water filter barrel (1), a clean water collection barrel (2) and a sewage collection barrel (3), wherein the primary water filter barrel (1) is provided with a first accommodating chamber (11) for accommodating primary water, the clean water collection barrel (2) is provided with a second accommodating chamber (21) for accommodating clean water, the sewage collection barrel (3) is provided with a third accommodating chamber (31) for accommodating sewage, and the primary water filter barrel (1) is provided with a first water inlet (12) connected to the ground on its upper end surface, characterized in that: The first accommodating chamber (11) is provided with a primary water filtering layered structure (4); the first accommodating chamber (11) is provided with a first water outlet (13) on the inner side wall at the upper end; the first water outlet (13) is connected to the inner side wall of the second accommodating chamber (21) through a first water outlet device (14); the first accommodating chamber (11) is provided with a second water outlet (15) for sewage discharge on the inner side wall at the lower end; the second water outlet (15) is connected to the inner side wall of the third accommodating chamber (31) through a second water outlet device (16); the third accommodating chamber (31) is provided with a cleaning device (5) for cleaning the third accommodating chamber (31); and the upper end surface of the third accommodating chamber (31) is also provided with a A third water outlet (32) is provided, the third water outlet (32) being connected to the inner wall of the first accommodating chamber (11) through a third water outlet device (33); a discharge port (34) connected to the third accommodating chamber (31) is provided at the center of the upper end surface of the sewage collecting barrel (3); a cleaning device (5) is rotatably connected in the third accommodating chamber (31) and can remove sludge in the third accommodating chamber (31); the cleaning device (5) comprises a first motor (51) provided at the bottom of the sewage collecting barrel (3); the first motor (51) is rotatably connected to a first rotating shaft (52) on one side close to the sewage collecting barrel (3); and a lower end of the sewage collecting barrel (3) is provided with a A first through hole (35) is provided for the first rotating shaft (52) to extend into the third accommodating chamber (31); the first rotating shaft (52) extends to a discharge port (34) at one end away from the first motor (51); a threaded rotating disc (53) is provided on the outer side wall of the first rotating shaft (52) for clearing sludge in the third accommodating chamber (31) out of the third accommodating chamber (31); a control device (54) is provided on the inner side wall of the upper end of the third accommodating chamber (31) for controlling the rotation of the first motor (51); the primary water filtering layered structure (4) comprises a first baffle plate (41) horizontally arranged in the first accommodating chamber (11); the outer side wall of the first baffle plate (41) and the first accommodating chamber (11) are connected to the outer side wall of the first baffle plate (41) 11) The inner wall is integrally formed, a second through hole (42) is provided at the center of the first baffle plate (41) for water to pass through, a second baffle plate (43) is provided below the second through hole (42), an outer wall of the second baffle plate (43) is circumferentially connected to the lower end surface of the first baffle plate (41) via an elastic line (44), a second contact switch (45) is provided on the lower end surface of the first baffle plate (41), and the second contact switch (45) is located directly above the second baffle plate (43), and a gap is left between the upper end surface of the second baffle plate (43) and the lower end surface of the first baffle plate (41) for water to flow from the upper end of the first accommodating chamber (11) to the lower end of the first accommodating chamber (11).

2. A rainwater collection device according to claim 1, characterized in that: The control device (54) is a first contact switch (55), the first contact switch (55) is electrically connected to the first motor (51), the discharge port (34) is away from the third accommodating chamber (31) and extends out of the ground through the first discharge pipe (36), the upper end of the first rotating shaft (52) extends along the first discharge pipe (36) to be flush with the ground, and the end of the first discharge pipe (36) extending out of the ground is detachably and rotatably connected to the end cover (37), the first contact switch (55) is fixedly connected to the inner wall of the third accommodating chamber (31), and the first contact switch (55) is located below the third water outlet (32).

3. A rainwater collection device according to claim 1, characterized in that: The second water outlet device (16) comprises a second water pipe (161) communicating with the second water outlet (15) and the inner wall of the third accommodating chamber (31); a second water pump (162) is arranged in the second water pipe (161); a third water flow sensing device (163) is arranged on the inner wall of one end of the second water pipe (161) close to the second water outlet (15); and the third water flow sensing device (163) is electrically connected to the second water pump (162).

4. A rainwater collection device according to claim 3, characterized in that: The first water outlet device (14) comprises a first water pipe (141) connecting the first water outlet (13) and the inner side wall of the second accommodating chamber (21); a first water pump (142) is arranged in the first water pipe (141); a water sensing device (18) is arranged on the inner side wall of the upper end of the first accommodating chamber (11); the water sensing device (18) is electrically connected to the first water pump (142); a first water flow sensing device (143) is arranged on the inner side wall of one end of the first water pipe (141) close to the first water outlet (13); the first water flow sensing device (143) is electrically connected to the second water pump (162); and a first filter screen (144) is directly arranged between the first water outlet (13) and the first water pipe (141).

5. A rainwater collection device according to claim 1, characterized in that: The third water outlet device (33) comprises a third water pipe (331) connecting the third water outlet (32) and the inner top surface of the first accommodating chamber (11); a third water pump (332) is arranged in the third water pipe (331); a second water flow sensing device (333) is arranged on the inner side wall of the third water pipe (331) close to the third water outlet (32); the second water flow sensing device (333) is electrically connected to the third water pump (332); and a third filter screen (334) is arranged at the connection between the third water outlet (32) and the third water pipe (331).

6. A rainwater collection device according to claim 1, characterized in that: A third contact switch (17) is provided on the inner side wall of the first accommodating chamber (11) below the first baffle (41) and above the second water outlet (15); the third contact switch (17) is electrically connected to the second water pump (162).

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