An intelligent rainwater collection device

Abstract

The present invention discloses an intelligent rainwater collection device, comprising 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 accommodating barrel is provided with a first water inlet connected to the ground, the primary water filter 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 primary water structure of the first water outlet is connected to a first water pump, the first water pump is connected to the inner side wall of the second accommodating chamber, 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 provided with a control structure for controlling sewage discharge, the second water outlet is connected to the second water pump through the primary water structure, the second water pump is connected to the inner side wall of the third accommodating chamber, and the outer side wall of the primary water filter barrel is provided with a first circuit board electrically connected to the first water pump, the second water pump and the control structure.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater collection, and in particular to an intelligent 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 the present technical solution, the first circuit board and the second circuit board are conventional control circuits in the market. Such control circuits are relatively common and most of them are public knowledge, so they are not specifically expanded in the present technical solution; the first circuit board and the second circuit board can be single-chip microcomputers or other control integrated circuits.

[0006] In this technical solution, the first water pump brand is Langsegg, and the model is HL80-23 water pump; it belongs to the existing technology, so it is not specifically developed in this technical solution.

[0007] 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.

[0008] In the present technical solution, the first contact switch is a contact switch of Taiwan Zhaosheng Switch ZSENSWITC; it belongs to the prior art, so it is not specifically described in the present technical solution.

[0009] In the present technical solution, the first water sensor switch and the second water sensor switch are water sensor switches of model SW08; they belong to the prior art and are therefore not specifically described in the present technical solution.

[0010] 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

[0011] 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.

[0012] The technical solution adopted by the present invention to solve the above-mentioned problem is: an intelligent 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, and 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 primary water filter 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 a first water pump through a first water outlet pipe, the first water pump is connected to the inner side wall of the second accommodating chamber, 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 provided with a control structure for controlling sewage discharge, the second water outlet is connected to the second water pump through a second water outlet pipe, the second water pump is connected to the inner side wall of the third accommodating chamber, and the outer side wall of the primary water filter barrel is provided with a first circuit board electrically connected to the first water pump, the second water pump and the control structure.

[0013] After adopting the above structure, the present invention has the following advantages compared with the existing structure:

[0014] The intelligent rainwater collection device of the present invention is more intelligent and automated than the rainwater collection devices in the prior art. The water pump and the motor in the rainwater collector are driven to work automatically through automatic detection between various switches, thereby completing the full automation of the entire rainwater collection process.

[0015] 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 first 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 first 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 first contact switch is provided on the lower end surface of the first baffle plate, the first 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.

[0016] As a preferred embodiment: the control structure includes a first groove arranged on the inner side wall of the second water outlet, a third baffle is slidably connected in the first groove, a first motor is fixedly connected to the bottom surface of the first groove, the first motor is slidably connected to the third baffle through a first telescopic rod, and the second water outlet is also provided with a first slide groove for the third baffle to be embedded in for closing the second water outlet.

[0017] As a preferred embodiment: the first contact switch is arranged on the lower end surface of the first baffle, and the first contact switch is located directly above the second baffle, the second baffle is a baffle made of foam and can float on the water surface, the first contact switch is electrically connected to the first circuit board, and the inner side wall of the first accommodating chamber above the first baffle is provided with a first water sensing switch, the first water sensing switch is located above the first water outlet, the first water sensing switch is electrically connected to the first circuit board, and the first water sensing switch can drive the first water pump through the first circuit board to extract water from the first accommodating chamber after primary water filtration, and the inner side wall of the first accommodating chamber is provided with a first filter net at the first water outlet to prevent impurities from flowing through the first water pump into the clean water collection barrel.

[0018] As a preferred embodiment: a second water sensing switch is provided on the inner side wall of the first accommodating chamber between the first water outlet and the upper end surface of the first baffle, the second water sensing switch is electrically connected to the first circuit board, and the second water sensing switch drives the second water pump through the first circuit board to extract the water filtered by the primary water filtering layered structure, and extracts the water filtered by the primary water filtering layered structure into the third accommodating chamber.

[0019] As a preferred embodiment: the outer wall of the sewage collection barrel is provided with a third water outlet connected to the third accommodating chamber inside the sewage collection barrel, the third water outlet is connected to a third water pump at one end away from the third accommodating chamber, the third water pump is connected to a sewer at one end away from the third water outlet, a second water sensor switch is provided on the inner wall of the third accommodating chamber, a second circuit board is provided on the outer wall of the sewage collection barrel, and the second water sensor switch is electrically connected to the second circuit board.

[0020] As a preferred embodiment: a first water flow sensing switch is provided on the inner wall of the first water outlet pipe, and the first water flow sensing switch is electrically connected to the first circuit board; a second water flow sensing switch is provided on the inner wall of the second water outlet pipe, and the second water flow sensing switch is electrically connected to the second circuit board.

[0021] As a preferred embodiment: a fourth water outlet is provided on the inner wall of the lower end of the second accommodating chamber, the fourth water outlet is connected to the outer wall of the clean water collection barrel and connected to the third water outlet pipe, and the end of the third water outlet pipe away from the fourth water outlet is connected to the water outlet device on the ground.

[0022] As a preferred embodiment, the first circuit board and the second circuit board are both provided with a waterproof cover on the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a structural schematic diagram of an intelligent rainwater collection device of the present invention.

[0024] In the figure, 1, primary water filter barrel, 2, clean water collection barrel, 3, sewage collection barrel, 4, primary water filtration layered structure, 5, control structure, 6, water outlet device, 7, cover body, 11, first accommodating chamber, 12, first water inlet, 13, first water outlet, 14, second water outlet, 15, first circuit board, 21, second accommodating chamber, 22, fourth water outlet, 23, third water outlet pipe, 31, third accommodating chamber, 32, third water outlet, 33, third water pump, 34, second water sensor switch, 35, second circuit board, 4 1. first baffle, 42. first through hole, 43. second baffle, 44. elastic line, 45. first contact switch, 51. first groove, 52. third baffle, 53. first motor, 54. first telescopic rod, 55. first slide groove, 111. first water sensor switch, 112. first filter, 113. second water sensor switch, 114. first water flow sensor switch, 131. first water outlet pipe, 132. first water pump, 141. second water outlet pipe, 142. second water pump, 143. second water flow sensor switch. DETAILED DESCRIPTION

[0025] A specific implementation of the present invention is described below with reference to the accompanying drawings.

[0026] 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 first contact switch.

[0027] At this time, the first contact switch will transmit a signal to the first circuit board, so that the first circuit board drives the first water pump and the second water pump to be in a standby state, and the initial water filtration state of the rainwater has been completed at this time, 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 rainwater accumulates to a certain amount in the space above the first baffle, the horizontal surface of the rainwater will touch the first water sensing switch located on the inner side wall of the upper end surface of the first accommodating chamber. At this time, the first water sensing switch will transmit a signal to the first circuit board, and the first circuit board will give the first water pump an instruction to start working. The rainwater above the first baffle will flow through the first filter net under the extraction of the first water pump and enter the second accommodating chamber in the clean water collection barrel.

[0028] When the first water pump pumps the rainwater level in the first accommodating chamber to below the first water outlet, the first water flow sensing switch on the inner wall of the first water outlet pipe will detect the termination of water flow. At this time, the first water flow sensing switch will give the first circuit board an instruction to drive the second water pump and the first motor to start working.

[0029] At this time, the first motor will pull the third baffle plate to retract into the first groove through the first telescopic rod, so that the initial water below the first baffle plate in the first accommodating chamber can flow into the second water pump through the second water outlet. When the second water pump starts to work, the initial water below the first baffle plate in the first accommodating chamber will enter the third accommodating chamber in the sewage collection bucket under the extraction of the second water pump; when the second water pump extracts all the water in the first accommodating chamber into the third accommodating chamber, the second water flow sensing switch on the inner side wall of the second initial water pipe will detect that the water flow in the second water outlet pipe has terminated; at this time, the second water flow sensing switch will transmit the instruction back to the first circuit board; the first circuit board will terminate the work of the second water pump, and drive the first motor to extend the first telescopic rod and push the third baffle plate to slide into the first slide groove to close the second water outlet.

[0030] When the water in the third chamber of the sewage collection barrel reaches a certain amount, the water surface in the third chamber will touch the second water sensor switch in the third chamber, and the second water sensor switch will transmit instructions to the second circuit board, and the second circuit board will give instructions to the third water pump to start working, and the third water pump will directly pump the sewage in the third chamber out of the third chamber and directly discharge the sewage through the sewer to the rainwater collection device, thereby completing the fully automatic rainwater collection process.

[0031] See also Figure 1The technical solution adopted by the present invention to solve the above problems is: an intelligent 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 primary water filter barrel 1 is provided with a first water inlet 12 connected to the ground on the 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 1 on the inner side wall of the upper end 3, the first water outlet 13 is connected to the first water pump 132 through the first water outlet pipe 131, the first water pump 132 is connected to the inner wall of the second accommodating chamber 21, the inner wall of the lower end of the first accommodating chamber 11 is provided with a second water outlet 14 for sewage discharge, the second water outlet 14 is provided with a control structure 5 for controlling sewage discharge, the second water outlet 14 is connected to the second water pump 142 through the second water outlet pipe 141, the second water pump 142 is connected to the inner wall of the third accommodating chamber 31, and the outer wall of the primary water filter barrel 1 is provided with a first circuit board 15 electrically connected to the first water pump 132, the second water pump 142 and the control structure 5.

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

[0033] The intelligent rainwater collection device of the present invention is more intelligent and automated than the rainwater collection devices in the prior art. The water pump and the motor in the rainwater collector are driven to work automatically through automatic detection between various switches, thereby completing the full automation of the entire rainwater collection process.

[0034] 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 first 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 first 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 first contact switch 45 is provided on the lower end surface of the first baffle plate 41, the first 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.

[0035] As a preferred embodiment: the control structure 5 includes a first groove 51 provided on the inner side wall of the second water outlet 14, a third baffle 52 is slidably connected in the first groove 51, a first motor 53 is fixedly connected to the inner bottom surface of the first groove 51, the first motor 53 is slidably connected to the third baffle 52 through a first telescopic rod 54, and a first slide groove 55 is also provided in the second water outlet 14 for the third baffle 52 to be embedded in for closing the second water outlet 14.

[0036] As a preferred embodiment: the first contact switch 45 is arranged on the lower end surface of the first baffle plate 41, and the first contact switch 45 is located directly above the second baffle plate 43, the second baffle plate 43 is a baffle plate made of foam and can float on the water surface, the first contact switch 45 is electrically connected to the first circuit board 15, and the inner wall of the first accommodating chamber 11 located above the first baffle plate 41 is provided with a first water sensing switch 111, the first water sensing switch 111 is located above the first water outlet 13, the first water sensing switch 111 is electrically connected to the first circuit board 15, and the first water sensing switch 111 can drive the first water pump 132 through the first circuit board 15 to extract the water after the primary water filtration in the first accommodating chamber 11, and the first water outlet 13 is provided on the inner wall of the first accommodating chamber 11. A first filter net 112 is provided to prevent impurities from flowing through the first water pump 132 into the clean water collection barrel 2.

[0037] As a preferred embodiment: a second water sensing switch 113 is provided on the inner wall of the first accommodating chamber 11 between the first water outlet 13 and the upper end surface of the first baffle 41, and the second water sensing switch 113 is electrically connected to the first circuit board 15, and the second water sensing switch 113 drives the second water pump 142 through the first circuit board 15 to extract the water filtered by the primary water filtering layered structure 4, and extracts the water filtered by the primary water filtering layered structure 4 into the third accommodating chamber 31.

[0038] As a preferred embodiment: the outer wall of the sewage collection barrel 3 is provided with a third water outlet 32 ​​connected to the third accommodating chamber 31 inside the sewage collection barrel 3, the third water outlet 32 ​​is connected to a third water pump 33 at one end away from the third accommodating chamber 31, the third water pump 33 is connected to a sewer at one end away from the third water outlet 32, the inner wall of the third accommodating chamber 31 is provided with a third water sensor switch 34, the outer wall of the sewage collection barrel 3 is provided with a second circuit board 35, and the third water sensor switch 34 is electrically connected to the second circuit board 35.

[0039] As a preferred embodiment: a first water flow sensing switch 114 is provided on the inner wall of the first water outlet pipe 131, and the first water flow sensing switch 114 is electrically connected to the first circuit board 15; a second water flow sensing switch 143 is provided on the inner wall of the second water outlet pipe 141, and the second water flow sensing switch 143 is electrically connected to the second circuit board 35.

[0040] As a preferred embodiment: a fourth water outlet 22 is provided on the inner wall of the lower end of the second accommodating chamber 21, and the fourth water outlet 22 is connected to the outer wall of the clean water collection barrel 2 and to the third water outlet pipe 23, and the end of the third water outlet pipe 23 away from the fourth water outlet 22 is connected to the water outlet device 6 on the ground.

[0041] As a preferred embodiment, the first circuit board 15 and the second circuit board 35 are both provided with a waterproof cover 7 on the outside.

Claims

1. An intelligent 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, and 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 a first water pump (132) via a first water outlet pipe (131); the first water pump (132) is connected to the inner side wall of the second accommodating chamber (21); the first accommodating chamber (11) is provided with a second water outlet (14) for sewage discharge on the inner side wall at the lower end; the second water outlet (14) is provided with a control structure (5) for controlling sewage discharge; the second water outlet (14) is provided with a control structure (5) for controlling sewage discharge; the second water outlet (14) is provided with a control structure (5) for controlling sewage discharge; the second water outlet (14) is provided with a control structure (5) for controlling sewage discharge; the first water outlet (13) is connected to the inner side wall of the second accommodating chamber (21); ... connected to the inner side wall of the second accommodating chamber (21); the first water outlet (13) is connected to the inner side wall of the second accommodating chamber (21); the first water outlet (14) is connected to the inner side wall of the second accommodating chamber (11); the first water outlet (14) is connected to the inner side wall of the second accommodating chamber (11); the 14) is connected to a second water pump (142) through a second water outlet pipe (141), the second water pump (142) is connected to the inner wall of the third accommodating chamber (31), the outer wall of the primary water filter barrel (1) is provided with a first circuit board (15) electrically connected to the first water pump (132), the second water pump (142) and the control structure (5); the primary water filtration layered structure (4) comprises a first baffle (41) horizontally arranged in the first accommodating chamber (11), the outer wall of the first baffle (41) is integrally formed with the inner wall of the first accommodating chamber (11), and the first baffle (41) is electrically connected to the first water pump (132), the second water pump (142) and the control structure (5). A first through hole (42) is provided at the center of the first accommodating chamber (41) for water to pass through, a second baffle (43) is provided below the first through hole (42), an outer wall of the second baffle (43) is circumferentially connected to the lower end surface of the first baffle (41) via an elastic line (44), a first contact switch (45) is provided on the lower end surface of the first baffle (41), and the first contact switch (45) is located directly above the second baffle (43), and a space is left between the upper end surface of the second baffle (43) and the lower end surface of the first baffle (41) for water to flow from the upper end of the first accommodating chamber (11) to the lower end surface of the first baffle (41). a gap at the lower end of a receiving cavity (11); the control structure (5) comprises a first groove (51) provided on the inner side wall of the second water outlet (14); a third baffle plate (52) is slidably connected in the first groove (51); a first motor (53) is fixedly connected to the inner bottom surface of the first groove (51); the first motor (53) is slidably connected to the third baffle plate (52) via a first telescopic rod (54); and a first sliding groove (55) is further provided in the second water outlet (14) for the third baffle plate (52) to be embedded in and used to close the second water outlet (14);The first contact switch (45) is arranged on the lower end surface of the first baffle (41), and the first contact switch (45) is located directly above the second baffle (43). The second baffle (43) is a baffle made of foam and can float on the water surface. The first contact switch (45) is electrically connected to the first circuit board (15). A first water sensing switch (111) is arranged on the inner side wall of the first accommodating chamber (11) above the first baffle (41). The first water sensing switch (111) is located above the first water outlet (13). The first water sensing switch (111) is electrically connected to the first circuit board (15). The first water sensing switch (111) can drive the first water pump (132) through the first circuit board (15) to extract water from the first accommodating chamber (11) after primary water filtration. The first accommodating chamber (11) is provided with a first filter screen (112) at the first water outlet (13) to prevent impurities from flowing through the first water pump (132) and entering the clean water collection barrel (2). ; 2. The intelligent rainwater collection device according to claim 1, characterized in that: A second water sensing switch (113) is provided on the inner side wall of the first accommodating chamber (11) between the first water outlet (13) and the upper end surface of the first baffle (41); the second water sensing switch (113) is electrically connected to the first circuit board (15); and the second water sensing switch (113) drives the second water pump (142) through the first circuit board (15) to extract water filtered by the primary water filtering layered structure (4), and extracts the water filtered by the primary water filtering layered structure (4) into the third accommodating chamber (31).

3. The intelligent rainwater collection device according to claim 2, characterized in that: The outer wall of the sewage collection barrel (3) is provided with a third water outlet (32) connected to a third accommodating chamber (31) inside the sewage collection barrel (3); the third water outlet (32) is connected to a third water pump (33) at one end away from the third accommodating chamber (31); the third water pump (33) is connected to a sewer at one end away from the third water outlet (32); a third water sensor switch (34) is provided on the inner wall of the third accommodating chamber (31); a second circuit board (35) is provided on the outer wall of the sewage collection barrel (3); and the third water sensor switch (34) is electrically connected to the second circuit board (35).

4. An intelligent rainwater collection device according to claim 1 or 3, characterized in that: A first water flow sensing switch (114) is provided on the inner side wall of the first water outlet pipe (131), and the first water flow sensing switch (114) is electrically connected to the first circuit board (15). A second water flow sensing switch (143) is provided on the inner side wall of the second water outlet pipe (141), and the second water flow sensing switch (143) is electrically connected to the second circuit board (35).

5. The intelligent rainwater collection device according to claim 1, characterized in that: A fourth water outlet (22) is provided on the inner side wall of the lower end of the second accommodating chamber (21); the fourth water outlet (22) is connected to the outer side wall of the clean water collection bucket (2) and to the third water outlet pipe (23); and one end of the third water outlet pipe (23) away from the fourth water outlet (22) is connected to a water outlet device (6) on the ground.

6. The intelligent rainwater collection device according to claim 3, characterized in that: The first circuit board (15) and the second circuit board (35) are both sleeved with a waterproof cover (7) on their outer sides.

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