CN223753399U - A roof rainwater harvesting system - Google Patents

Abstract

This utility model relates to the field of rainwater harvesting technology, and more specifically, to a rooftop rainwater harvesting system, comprising a rainwater collection unit, a turbidity detection unit, a water storage unit, and a filtration unit connected in sequence. The rainwater collection unit and the turbidity detection unit have a detection chamber and a diversion channel communicating with the detection chamber. The turbidity detection unit also includes several stirring devices, a turbidity sensor, a diversion valve, and an inlet valve located within the detection chamber. The diversion valve is located at the diversion channel, and the inlet valve is located at the pipe between the turbidity detection unit and the water storage unit. The turbidity sensor is electrically connected to both the diversion valve and the inlet valve. The stirring devices are used to stir the rainwater. The stirring devices within the detection chamber ensure uniform turbidity of the rainwater, improving the accuracy of turbidity detection and preventing deviations in detection results due to rainwater sedimentation. This allows rainwater with excessive turbidity to be discharged, or rainwater with insufficient turbidity to be sent to the water storage unit, thus affecting the quality of the water used.

Description

Roof rainwater collecting system

Technical Field

The utility model relates to the technical field of rainwater collection, in particular to a roof rainwater collection system.

Background

In modern society, water resource management and sustainable utilization become important issues, and conventional water supply systems face challenges of high energy consumption and operation cost, so that rainwater collection systems are attracting attention as an alternative water resource utilization mode, and these systems convert rainwater into renewable water resources for various purposes including irrigation, flushing, landscape water and the like by collecting and utilizing precipitation, and the rainwater collection systems have advantages of saving water resources, reducing energy consumption and cost, reducing flood risk, and promoting environmental protection and sustainable development.

The prior art discloses a roof rainwater collecting system, which comprises a water inlet pipeline, a water purifying device and a water storage container, wherein the water inlet pipeline is provided with a water inlet, a drainage port and a water collecting pipeline, the water inlet is used for being connected with a water outlet of a roof, the water purifying device and the water storage container are connected on the water collecting pipeline, the water inlet pipeline is provided with a rainwater turbidity detecting element and a drainage valve, the drainage valve is arranged at the drainage port, the rainwater turbidity detecting element is electrically connected with the drainage valve, and the rainwater turbidity detecting element is used for detecting the turbidity of circulating rainwater, controlling the drainage valve to be opened when the detected turbidity is larger than a turbidity set value, and controlling the drainage valve to be closed when the detected turbidity is smaller than the turbidity set value. The turbidity detection element can effectively detect the turbidity degree of the circulating rainwater in the water inlet pipeline, so that whether the rainwater can be used as raw water or not can be truly and accurately judged, and the control accuracy of drainage and water collection is higher.

However, as other tiny impurities and particles are mixed in the rainwater, the impurities are easy to precipitate in the turbidity detection unit, so that the water quality is uneven, the detection result is affected by the uneven water quality, the rainwater with excessive turbidity is discarded, waste is caused, or the water with insufficient turbidity enters a water storage tank, and the quality of the used water is affected.

Disclosure of utility model

The utility model aims to solve the problems that in the prior art, rainwater is easy to precipitate and the turbidity is uneven when the rainwater collecting system is used for turbidity detection, so that detection is inaccurate.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The utility model provides a roof rainwater collecting system, including rainwater collection unit, with the turbidity detecting element that the delivery port of rainwater collection unit is connected, with the water storage unit that the delivery port of turbidity detecting element is connected and with the filter unit that the delivery port of water storage unit is connected, rainwater collection unit, turbidity detecting element, water storage unit with pass through the pipe connection between the filter unit, detection chamber and with the abandon the flow channel of detection chamber intercommunication has been seted up to inside the turbidity detecting element, turbidity detecting element still includes a plurality of agitating unit, turbidity sensor, abandoning flow valve and the water intaking valve that are located the detection intracavity respectively, abandon the flow valve setting in abandon the flow channel department, the water intaking valve setting is in turbidity detecting element with the pipe department between the water storage unit, turbidity sensor respectively with abandon the flow valve with the water intaking valve electricity is connected, agitating unit is used for stirring rainwater.

According to the rainwater collecting system, when raining, the rainwater collecting unit of the system can be used for collecting rainwater, then the collected rainwater enters the turbidity detecting unit through the water collecting channel, a detecting cavity is arranged in the turbidity detecting unit, a certain amount of rainwater can be stored, the stirring device positioned in the detecting cavity can be started to stir the rainwater, so that the turbidity of the rainwater in the detecting cavity is uniform, the accuracy of turbidity detection can be improved, the turbidity sensor can detect the turbidity of the rainwater in the detecting cavity, if the turbidity is too high, the drainage valve can be controlled to be opened, the rainwater in the detecting cavity is discharged, if the turbidity is low, the water inlet valve is started, the rainwater leaves from the water inlet valve and enters the water storage unit, a large amount of rainwater can be stored in the water storage unit, when water is needed, the stored rainwater can be filtered through the filtering unit, and then the rainwater can be used for non-drinking water such as toilet flushing, greening water and the like. The setting of agitating unit lets the rainwater turbidity of detecting the intracavity become even through the stirring, has improved turbidity detection's degree of accuracy, avoids because the rainwater deposits, leads to the testing result to appear the deviation to discharge the rainwater that turbidity was too closed, or send the rainwater that turbidity was not too closed into water storage unit, influence the quality of using water.

Further, the stirring device comprises a driving piece fixed on the inner wall of the detection cavity, a rotating shaft connected with the output end of the driving piece and a plurality of stirring wheels fixed on the rotating shaft. The drive piece can drive the axis of rotation and rotate after starting to drive the stirring wheel and rotate, drive the rainwater stirring that detects the intracavity through the rotation of stirring wheel, thereby realize stirring the rainwater.

Further, the turbidity detection unit is positioned at the bottom of the detection cavity, and the axis of the rotating shaft is parallel to the horizontal plane. Because impurity and particulate matter that the rainwater carried deposit in the bottom that detects the chamber easily, consequently agitating unit sets up in the bottom that detects the chamber, can utilize the vortex that the stirring wheel rotation drove to raise the sediment better, and the axis of rotation of stirring wheel is on a parallel with the horizon, consequently detects the interior vortex of intracavity and can drive particulate matter evenly distributed in vertical direction for the testing result is more accurate.

Further, the water storage unit comprises a water storage tank, an outer ladder arranged on the side face of the water storage tank, an inner ladder arranged in the water storage tank and a skylight arranged at the top of the water storage tank. The storage water tank can store the rainwater of following turbidity detection unit exhaust, and outside ladder makes things convenient for the people to climb to the storage water tank top, and the skylight can conveniently observe the inside condition of storage water tank, and inside ladder makes things convenient for the people to climb to the storage water tank inside.

Further, the water storage unit is further provided with an overflow pipe, one end of the overflow pipe is arranged on the side face of the water storage tank, the distance between the end of the overflow pipe and the bottom of the water storage tank is three fifths to four fifths of the height of the water storage tank, and the other end of the overflow pipe is connected to a drainage pipeline. When the water level in the water storage tank reaches the water inlet of the overflow pipe, redundant water can be discharged to the drainage pipeline from the overflow pipe, and the system is prevented from being broken down and equipment is prevented from being damaged due to the fact that the flow is too large and pressure is caused to the system.

Further, the water storage unit is further provided with a blow-down pipe and a back flushing pipe, one end of the blow-down pipe is connected with the bottom of the water storage tank, the other end of the blow-down pipe is connected to the drainage pipeline, a blow-down valve is arranged at the blow-down pipe, the back flushing pipe is fixed to the bottom of the water storage tank, one end of the back flushing pipe is located in the water storage tank, and the other end of the back flushing pipe extends to the outside of the water storage tank. After the water storage tank is used for a period of time, particles and impurities in water can be accumulated at the bottom of the water storage tank to affect water quality and water storage capacity, sediment can be discharged from the blow-down pipe by opening the blow-down valve, and when the water storage tank is cleaned, a certain amount of clear water or waste water can be injected into the water storage tank through the backwashing pipe to help clean the sediment, so that the water quality and the water storage space in the water storage tank are maintained.

Further, the filter unit comprises a filter container, a filter medium and a blind plate, wherein the water inlet pipe of the filter unit is positioned at the top of the filter container, the water outlet pipe of the filter unit is positioned at the bottom of the filter container, the filter medium is positioned between the water inlet pipe and the water outlet pipe of the filter unit, and the blind plate is arranged in the filter container and positioned at the bottom of the filter medium. When water is needed, water in the water storage tank can be released into the filtering unit and flow downwards in the filtering container from top to bottom, and partial impurities can be removed through the filtering medium, so that the rainwater can reach a usable level, and when the filtering medium is saturated and needs to be replaced, the medium can be replaced by disassembling the blind plate.

Further, the filter medium is respectively a gravel layer, a quartz sand layer and a smokeless coal bed from top to bottom. The gravel, quartz sand and anthracite are respectively used for removing large-particle impurities, organic matters and peculiar smell in water.

Further, the rainwater collection unit is arranged at the top of the building and comprises a drainage plate, an included angle is formed between the drainage plate and the horizontal plane, the bottom end of the drainage plate is positioned at the water inlet of the turbidity detection unit, and the bottom end is the lower end in the vertical direction. Because drainage board and horizontal plane form the contained angle, consequently drop the rainwater on the drainage board and can get into turbidity detection unit's water inlet along the drainage board under self gravity, collection efficiency is higher.

Further, the water inlet of the turbidity detection unit is funnel-shaped, and a detachable filter screen is arranged inside the turbidity detection unit. In the rainwater collecting process, large sundries such as leaves, plastic bags and the like can be brought, and the filter screen can keep down the sundries to avoid blocking the pipeline.

Compared with the prior art, the utility model has the beneficial effects that:

1. The stirring device is arranged in the detection cavity, so that the turbidity of the rainwater in the detection cavity is uniform through stirring, the accuracy of turbidity detection is improved, deviation of detection results caused by precipitation of the rainwater is avoided, and therefore the rainwater with excessive turbidity is discharged, or the rainwater with insufficient turbidity is sent to the water storage unit, and the quality of used water is affected;

2. The overflow pipe in the water storage unit is arranged, so that the water level of the water storage tank is prevented from being too high, the system pressure is prevented from being too high, the system is prevented from running or equipment is prevented from being damaged, the blow-down pipe and the backwash pipe are mutually matched, water is discharged through water injection, the sediment at the bottom of the water storage tank is taken away, and the water quality and the water storage space in the water storage tank are ensured;

3. The water inlet of the turbidity detection unit is provided with a detachable filter screen, so that some impurities with larger body types brought by rainfall are blocked, and the pipeline is prevented from being blocked.

Drawings

FIG. 1 is a schematic view of a roof rainwater collection system;

FIG. 2 is a schematic diagram of the structure of a turbidity detection unit;

FIG. 3 is a schematic diagram of a turbidity detection unit with another view angle;

FIG. 4 is a schematic view of a water storage unit;

Fig. 5 is a schematic structural view of the filter unit.

In the drawing, 100 parts of rainwater collecting units, 110 parts of drainage plates, 200 parts of turbidity detecting units, 210 parts of filter screens, 220 parts of detection cavities, 230 parts of waste flow channels, 240 parts of stirring devices, 241 parts of driving parts, 242 parts of rotation shafts, 243 parts of stirring wheels, 250 parts of turbidity sensors, 260 parts of waste flow valves, 270 parts of water inlet valves, 300 parts of water storage units, 310 parts of water storage tanks, 320 parts of outer ladders, 330 parts of inner ladders, 340 parts of skylight, 350 parts of overflow pipes, 360 parts of blow-down pipes, 361 parts of blow-down valves, 370 parts of backwash pipes, 400 parts of filtering units, 410 parts of filtering containers, 420 parts of filtering media, 421 parts of gravel layers, 422 parts of quartz sand layers, 423 parts of smokeless coal layers, 430 parts of blind plates, 500 parts of first water pumps, 600 parts of second water pumps and 700 parts of third water pumps.

Detailed Description

The utility model is further described below in connection with the following detailed description. In which the drawings are for illustrative purposes only and are not intended to be construed as limiting the present patent, and in which certain elements of the drawings may be omitted, enlarged or reduced in order to better illustrate embodiments of the present utility model, and not to represent actual product dimensions, it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., which are based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or elements referred to must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that the specific meanings of the terms described above should be understood by those skilled in the art according to circumstances.

Example 1

1-3, A roof rainwater collecting system, comprising a rainwater collecting unit 100, a turbidity detecting unit 200 connected with a water outlet of the rainwater collecting unit 100, a water storage unit 300 connected with the water outlet of the turbidity detecting unit 200, and a filtering unit 400 connected with the water outlet of the water storage unit 300, wherein the rainwater collecting unit 100, the turbidity detecting unit 200, the water storage unit 300 and the filtering unit 400 are connected through pipelines, a detecting cavity 220 and a discarding channel 230 communicated with the detecting cavity 220 are arranged in the turbidity detecting unit 200, the filtering unit 400 can be connected to a water using unit through a pipeline, the water using unit can be a toilet, a watering device, a washing device of a car washing place and the like, the rainwater collecting unit 100 comprises a drainage plate 110, the drainage plate 110 forms an included angle of 3 degrees with the horizontal plane, the bottom end of the drainage plate 110 is positioned at the water inlet of the turbidity detecting unit 200, the bottom end is a lower end in the vertical direction, the water inlet of the turbidity detecting unit 200 is funnel-shaped, a detachable filter screen 210 is arranged in the turbidity detecting unit 200, the turbidity detecting unit 200 further comprises three stirring devices 240, a turbidity sensor 250, a flow discarding valve 260 and a water inlet valve 270 which are respectively positioned in the detecting cavity 220, the stirring devices 240 are positioned at the bottom of the detecting cavity 220, the stirring devices 240 comprise driving pieces 241 fixed on the inner wall of the detecting cavity 220, rotating shafts 242 connected with the output ends of the driving pieces 241 and four stirring wheels 243 uniformly distributed on the rotating shafts 242, in this embodiment, the driving pieces 241 are stirring motors, the axis of the rotating shafts 242 is parallel to the horizontal plane, the blade surfaces of the stirring wheels 243 are coated with fluorinated polymer coatings, the blades of the stirring wheels 243 are detachably connected with the impellers through buckles, the flow discarding valve 260 is arranged at the flow discarding channel 230, the water inlet valve 270 is disposed at a pipe between the turbidity detecting unit 200 and the water storage unit 300, and the turbidity sensor 250 is electrically connected to the reject valve 260 and the water inlet valve 270, respectively, and in this embodiment, both the water inlet valve 270 and the reject valve 260 are solenoid valves.

The working principle of this embodiment is as follows:

The rainwater collecting unit 100 of the system is arranged at the top of a building, when rainfall occurs, the rainwater collecting unit 100 of the system can be used for collecting rainwater, because the drainage plate 110 and the horizontal plane form an included angle, the rainwater falling on the drainage plate 110 can enter the water inlet of the turbidity detecting unit 200 along the drainage plate 110 under the self gravity, the collecting efficiency is higher, the filter screen 210 can prevent large sundries such as leaves, plastic bags and the like from blocking a pipeline, the collected rainwater enters the turbidity detecting unit 200 through the pipeline, the turbidity detecting unit 200 is provided with the detecting cavity 220, a certain amount of rainwater can be stored, and because the impurities and the particles carried by the rainwater are easy to be deposited at the bottom of the detecting cavity 220, the driving piece 241 arranged at the bottom of the detecting cavity 220 can drive the rotation shaft 242 to rotate, thereby driving the stirring wheel 243 to rotate, the rotation of the stirring wheel 243 drives the rainwater in the detection cavity 220 to stir, the vortex driven by the rotation of the stirring wheel 243 lifts the sediment, the rotation axis 242 of the stirring wheel 243 is parallel to the horizontal line, therefore, the vortex in the detection cavity 220 can drive the particles to be uniformly distributed in the vertical direction, the turbidity of the rainwater in the detection cavity 220 is uniform, the turbidity detection accuracy can be improved, the turbidity sensor 250 can detect the turbidity of the rainwater in the detection cavity 220, if the turbidity is too high, the drainage valve 260 is controlled to be opened, the rainwater in the detection cavity 220 is discharged, if the turbidity is low, the water inlet valve 270 is started, the rainwater leaves from the water inlet valve 270 and enters the water storage unit 300, the water storage unit 300 can store a large amount of rainwater, when water is needed, the stored rainwater can be filtered by the filtering unit 400, the filtering unit 400 can be used for flushing a toilet bowl, non-potable water such as greening water.

The beneficial effects of this embodiment are as follows:

Set up agitating unit 240 in detection chamber 220, let the rainwater turbidity in the detection chamber 220 become even through the stirring, the degree of accuracy that turbidity detected has been improved, avoid because the rainwater deposits, the deviation appears in the testing result, thereby discharge the rainwater that turbidity was closed, or send the rainwater that turbidity was not closed into the water storage unit, influence the quality of using water, agitating unit 240 sets up in the bottom of detection chamber, can utilize the vortex that the stirring wheel 243 rotation drove to get rid of the deposit better, the axis of rotation of stirring wheel 243 is on a parallel with the horizon, consequently, the vortex in the detection chamber 220 can drive particulate matter evenly distributed in the vertical direction, make the testing result more accurate, the blade surface coating fluoropolymer coating, can reduce the adhesion of aquatic suspended solid, improve the self-cleaning ability of equipment, thereby reduce the clearance frequency, connect through the buckle between blade and the impeller, when need maintain or change the blade, the dismantlement speed is faster.

Example two

The present embodiment is a second embodiment of a roof rainwater collecting system, which is similar to the embodiment in that, as shown in fig. 1 and 4, a first suction pump 500 is provided at a pipe between a water storage unit 300 and a turbidity detecting unit 200, the water storage unit 300 includes a water storage tank 310, an outer step 320 installed at a side of the water storage tank 310, an inner step 330 installed inside the water storage tank 310, a skylight 340 opened at a top of the water storage tank 310, an overflow pipe 350, a blow-down pipe 360 and a backwash pipe 370, one end of the overflow pipe 350 is installed at a side of the water storage tank 310, and a distance between the end and the bottom of the water storage tank 310 is four fifths of the height of the water storage tank 310, the other end is connected to a drainage pipe, one end of the blow-down pipe 360 is connected to the bottom of the water storage tank 310, a blow-down valve 361 is provided at the blow-down pipe 360, the backwash pipe 370 is fixed at the bottom of the water storage tank 310, one end of the backwash pipe 370 is located in the water storage tank 310, the other end extends to the outside of the water storage tank 310, and the end is provided with a pipe plug.

The working principle of this embodiment is as follows:

The rainwater that discharges from turbidity detecting unit 200 can be stored to storage tank 310, outer ladder 320 makes things convenient for the people to climb to storage tank 310 top, skylight 340 can conveniently observe the inside condition of storage tank 310, inside ladder 330 makes things convenient for the people to climb to storage tank 310 is inside, when the water level in storage tank 310 reaches the water inlet department of overflow pipe 350, unnecessary water can be discharged to the drainage pipe from overflow pipe 350, avoid because the flow is too big, cause the pressure to the system, cause system breakdown, equipment damage, after storage tank 310 uses a period, granule and the impurity in the water can pile up in storage tank 310's bottom, influence quality of water and water storage capacity, through opening relief valve 361, can discharge the sediment from blow-down pipe 360, when carrying out storage tank 310 clearance, can pour into storage tank 310 inside with a certain amount of clear water or waste water through backwash pipe 370, help clear away the sediment, keep the quality of water and the water storage space in storage tank 310.

The remaining operation principles of this embodiment are identical to those of the embodiment.

Example III

The present embodiment is a third embodiment of a roof rainwater collecting system, which is similar to the first embodiment and the second embodiment, and is different in that, as shown in fig. 1 and fig. 5, a second water pump 600 is disposed at a pipeline between the water storage unit 300 and the filter unit 400, a third water pump 700 is disposed between the water storage unit 300 and the water using unit, the filter unit 400 includes a filter container 410, a filter medium 420 and a blind plate 430, a water inlet pipe of the filter unit 400 is located at the top of the filter container 410, a water outlet pipe is located at the bottom of the filter container 410, the filter medium 420 is located between the water inlet pipe and the water outlet pipe of the filter unit 400, the blind plate 430 is installed in the filter container 410 and located at the bottom of the filter medium 420, and the filter medium 420 is a gravel layer 421, a quartz sand layer 422 and a smokeless coal layer 423 from top to bottom, in addition, and the material and composition of the filter medium 420 can be replaced according to actual needs.

The working principle of this embodiment is as follows:

When water is needed, water in the water storage tank 310 is pumped by the second water pump 600 to enter the filtering unit 400 and flows downwards in the filtering container 410, and rainwater passes through the gravel layer 421, the quartz sand layer 422 and the smokeless coal layer 423 to remove large particle impurities, organic matters and peculiar smell in the water, so that the rainwater reaches a usable level, and when the filtering medium 420 is saturated and needs to be replaced, the medium can be replaced by disassembling the blind plate 430.

The other working principles of this embodiment are the same as those of the first embodiment.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The utility model provides a roof rainwater collecting system, includes rainwater collection unit (100), with turbidity detecting element (200) that the delivery port of rainwater collection unit (100) is connected, with water storage unit (300) that the delivery port of turbidity detecting element (200) is connected and with filter unit (400) that the delivery port of water storage unit (300) is connected, rainwater collection unit (100), turbidity detecting element (200), water storage unit (300) with pass through the pipe connection between filter unit (400), characterized in that, turbidity detecting element (200) inside set up detection chamber (220) and with abandon flow channel (230) that detection chamber (220) communicate, turbidity detecting element (200) still include respectively be located a plurality of agitating unit (240) in detection chamber (220), turbidity sensor (250), abandon flow valve (260) and water intaking valve (270), abandon flow valve (260) set up in abandon flow channel (230), water intaking valve (270) set up in turbidity detecting element (200) with water storage unit (300) between the pipeline department, turbidity sensor (250) are used for agitating unit (240) and agitating unit (270) respectively.

2. A roof stormwater collection system as claimed in claim 1, wherein the agitation means (240) comprises a driving member (241) fixed to an inner wall of the detection chamber (220), a rotation shaft (242) connected to an output end of the driving member (241), and a plurality of agitation wheels (243) fixed to the rotation shaft (242).

3. A roof stormwater collection system as claimed in claim 2, wherein the turbidity detection unit (200) is located at the bottom of the detection chamber (220), and the axis of the rotation shaft (242) is parallel to the horizontal plane.

4. The roof rainwater collection system of claim 1, wherein the water storage unit (300) includes a water storage tank (310), an outer ladder (320) mounted to a side of the water storage tank (310), an inner ladder (330) mounted inside the water storage tank (310), and a skylight (340) opened at a top of the water storage tank (310).

5. A roof stormwater collection system as claimed in claim 4, wherein the water storage unit (300) is further provided with an overflow pipe (350), one end of the overflow pipe (350) is mounted to a side of the water storage tank (310), and a distance between the end and a bottom of the water storage tank (310) is three-fifths to four-fifths of a height of the water storage tank (310), and the other end is connected to a drain pipe.

6. The roof rainwater collection system according to claim 5, wherein the water storage unit (300) is further provided with a blow-down pipe (360) and a backwash pipe (370), one end of the blow-down pipe (360) is connected to the bottom of the water storage tank (310), the other end is connected to a drainage pipe, a blow-down valve (361) is provided at the blow-down pipe (360), the backwash pipe (370) is fixed to the bottom of the water storage tank (310), one end of the backwash pipe (370) is located in the water storage tank (310), and the other end extends to the outside of the water storage tank (310).

7. The roof stormwater collection system as claimed in claim 1, wherein the filtration unit (400) comprises a filtration vessel (410), a filtration medium (420) and a blind plate (430), the water inlet pipe of the filtration unit (400) is located at the top of the filtration vessel (410), the water outlet pipe is located at the bottom of the filtration vessel (410), the filtration medium (420) is located between the water inlet pipe and the water outlet pipe of the filtration unit (400), and the blind plate (430) is installed in the filtration vessel (410) and located at the bottom of the filtration medium (420).

8. The roof stormwater collection system as claimed in claim 7, wherein the filter medium (420) is a gravel layer (421), a quartz sand layer (422), a smokeless coal layer (423) from top to bottom, respectively.

9. The roof rainwater collection system according to any one of claims 1-8, wherein the rainwater collecting unit (100) is installed at the top of a building, the rainwater collecting unit (100) comprises a drainage plate (110), the drainage plate (110) forms an included angle with the horizontal plane, and the bottom end of the drainage plate (110) is located at the water inlet of the turbidity detecting unit (200).

10. The roof rainwater collection system according to claim 9, wherein the water inlet of the turbidity detection unit (200) is funnel-shaped and a detachable filter screen (210) is provided inside.