Rainwater recycling device

Abstract

The utility model discloses a rainwater recycling device which comprises a rainwater recycling reservoir, a water pump set, a surge tank, a pressure sensor, a water outlet device and a relay set. The rainwater recycling reservoir, the water pump set and the water outlet equipment are sequentially communicated through pipelines. The surge tank and the pressure sensor are arranged on a pipeline between the water pump group and the water outlet equipment; the pressure sensor is provided with a lower limit contact and an upper limit contact, the relay group comprises a relay contact, and the relay group is connected with the power supply circuit through the lower limit contact and the upper limit contact; the water pump set is connected with a power circuit through a relay contact. And the water outlet pressure of the treated rainwater can meet the preset requirement.

Description

Technical Field

[0001] The utility model belongs to the technical field of rainwater recycling, and particularly relates to a rainwater recycling device. Background Art

[0002] Rainwater harvesting and utilization projects aim to alleviate urban water shortages, reduce urban flooding, and improve the urban water environment. By collecting and treating rainwater, it can be converted into usable water for non-potable uses such as landscaping irrigation, road cleaning, and industrial water. This not only conserves tap water resources but also reduces pressure on urban drainage systems.

[0003] The collection and utilization of rainwater has a positive impact on the urban ecological environment. It can reduce the pollution caused by rainwater runoff, replenish groundwater through infiltration, and help maintain the stability of groundwater resources.

[0004] Ensuring stable water pressure is crucial for rainwater reuse in production water supply. If the rainwater supply system experiences insufficient pressure or a temporary water outage due to a malfunction or other reason, production quality and, in severe cases, safety could be affected. Currently, rainwater recycling and reuse systems primarily focus on rainwater collection and initial treatment, rather than further development into rainwater reuse. Despite rainwater treatment, pressure instability can still occur during the stable delivery of treated rainwater to the user.

[0005] For example, patent CN107152071A discloses a rainwater recycling system, including: a rainwater filtration system, a clean water tank system, and an overflow tank; a water pipe is used to connect the bottom of the rainwater filtration system with the bottom of the clean water tank system, and the upper part of the rainwater filtration system is connected to the overflow tank through an overflow pipe. The overflow tank is used to store excess water from the rainwater filtration system. Permeable balls of different sizes are layered in the rainwater filtration system, and the permeable balls are used to filter rainwater.

[0006] Therefore, how to provide a device that can stably transport treated rainwater is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0007] In view of the defects in the prior art, the present invention provides a rainwater recycling device, which can ensure that the outlet water pressure of the treated rainwater meets the predetermined requirements.

[0008] The utility model provides a rainwater recycling device, comprising: a rainwater recycling reservoir, a water pump group, a pressure regulating tank, a pressure sensor, a water outlet device and a relay group;

[0009] The rainwater recovery reservoir, water pump group and water outlet equipment are connected in sequence through pipelines;

[0010] The pressure stabilizing tank and pressure sensor are installed on the pipeline between the water pump group and the water outlet equipment;

[0011] The pressure sensor is provided with a lower limit contact and an upper limit contact, the relay group includes relay contacts, and the relay group is connected to the power supply circuit through the lower limit contact and the upper limit contact;

[0012] The water pump group is connected to the power supply line through the relay contacts.

[0013] Furthermore, the volume of the rainwater recovery reservoir is greater than 10V0, where V0 is the daily water consumption of the water outlet equipment.

[0014] Furthermore, the rainwater recycling device includes a purification and reuse device connected to the rainwater recycling tank, which is used to filter and disinfect the rainwater.

[0015] Furthermore, the treatment time of the purification and reuse equipment is 1 to 2 h / r, and the treated water volume is 1 / 2V0 / h to V0 / h, where V0 is the daily water consumption of the water outlet equipment.

[0016] Furthermore, the water pump group extends to the bottom of the rainwater recovery tank through a pipeline, and a filter is provided on the pipeline located at the bottom of the rainwater recovery tank, and a bottom valve is provided at the end of the pipeline located at the bottom of the rainwater recovery tank.

[0017] Furthermore, the pressure sensor is an electric contact pressure gauge, the pressure bearing value of the lower limit contact thereof is not less than 0.3 MPa, and the pressure bearing value of the upper limit contact thereof is not more than 0.6 MPa.

[0018] Furthermore, the relay contacts include a loop contact and a voltage regulating contact, and the relay group further includes an electromagnetic drive assembly matching the relay contacts;

[0019] The rainwater recycling device also includes a power supply circuit connected to the power supply. The power supply circuit, loop contacts, electromagnetic drive components and pressure sensors are connected to form a first loop. The power supply circuit, voltage regulating contacts and water pump group are connected to form a second loop.

[0020] Furthermore, the loop contact includes a first normally open contact, a second normally open contact, and a normally closed contact, the voltage regulating contact includes a plurality of third normally open contacts, and the electromagnetic drive assembly includes a first electromagnetic drive assembly matching the first normally open contact and the second normally open contact, a second electromagnetic drive assembly matching the normally closed contact, and a third electromagnetic drive assembly matching the plurality of third normally open contacts;

[0021] One phase line of the power supply circuit is connected to one end of the first electromagnetic drive component, the second electromagnetic drive component and the third electromagnetic drive component through the line, the other end of the first electromagnetic drive component is connected to the normally closed contact and one end of the lower limit contact of the pressure sensor, the other end of the normally closed contact is connected to the first normally open contact and the neutral line of the power supply circuit in sequence, the other end of the lower limit contact of the pressure sensor is connected to the power supply circuit, the other end of the second electromagnetic drive component is connected to the upper limit contact of the pressure sensor and the neutral line of the power supply circuit in sequence, and the other end of the third electromagnetic drive component is connected to the second normally open contact and the neutral line of the power supply circuit in sequence; the power supply circuit is connected to the water pump group through the line, and a third normally open contact is provided on all lines connecting the power supply circuit and the water pump group.

[0022] Furthermore, the water pump group includes a plurality of vertical multi-stage centrifugal pumps.

[0023] Furthermore, it also includes a switching valve, which is arranged on the pipeline between the water pump group and the water outlet equipment;

[0024] Furthermore, it also includes a tap water replenishing device, which is connected to the water outlet device through a switching valve.

[0025] Furthermore, it also includes a control cabinet, a water level meter and a water quality sensor, and the controller is connected to the water pump group, the pressure sensor, the water level meter and the water quality sensor circuits respectively.

[0026] The utility model provides a rainwater recycling device, which has at least the following beneficial effects:

[0027] (1) The outlet water pressure is detected by a pressure sensor, and when the outlet water pressure exceeds the upper and lower pressure limits, a control signal is generated to control the water pump group, so that the water pump group completes the pressure regulation of the outlet water pressure, and finally makes the outlet water pressure meet the predetermined pressure requirement.

[0028] (2) Design the volume of the rainwater recycling reservoir so that it can better meet the rainwater reuse needs in different scenarios.

[0029] (3) By setting up a bottom valve and a filter, foreign matter in the recycled rainwater can be further reduced.

[0030] (4) By setting up an electric contact pressure gauge, accurate detection and feedback of the upper and lower limits of the recycled rainwater pressure can be achieved, ensuring that the water pump group has a high adjustment sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a rainwater recycling device provided by the utility model;

[0032] Figure 2 A schematic structural diagram of a rainwater recycling device provided in one embodiment of the present utility model;

[0033] Figure 3 A schematic diagram of the connection of a relay group provided in one embodiment of the present utility model.

[0034] Explanation of the accompanying symbols: 1-rainwater recovery tank, 2-water pump group, 3-pressure regulating tank, 4-pressure sensor, 5-water outlet equipment, 61-first electromagnetic drive component, 62-first normally open contact, 63-second normally open contact, 71-second electromagnetic drive component, 72-normally closed contact, 81-third electromagnetic drive component, 82-third normally open contact, 91-lower limit contact, 92-upper limit contact. DETAILED DESCRIPTION

[0035] To better understand the above technical solution, the following will be described in detail with reference to the accompanying drawings and specific implementation methods. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise, and "a plurality" generally includes at least two.

[0037] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or device. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or device comprising the element.

[0038] like Figure 1 and Figure 2 As shown, the utility model provides a rainwater recycling device, which may include: a rainwater recycling reservoir 1, a water pump group 2, a pressure regulating tank 3, a pressure sensor 4, a water outlet device 5 and a relay group;

[0039] The rainwater recovery reservoir 1, the water pump group 2 and the water outlet device 5 are connected in sequence through pipelines;

[0040] The pressure stabilizing tank 3 and the pressure sensor 4 are sequentially arranged on the pipeline between the water pump group 2 and the water outlet device 5;

[0041] The pressure sensor 4 is provided with a lower limit contact 91 and an upper limit contact 92 , and the relay group includes relay contacts, and the relay group is connected to the power supply circuit via the lower limit contact 91 and the upper limit contact 92 ;

[0042] The water pump group 2 is connected to the power supply line through the relay contact, and the opening and closing of the water pump group 2 is controlled based on the pressure signal triggered by the lower limit contact 91 and the upper limit contact 92 of the pressure sensor 4.

[0043] After the rainwater enters the rainwater recycling reservoir 1, the rainwater recycling reservoir 1 needs to have a sedimentation function, and both the water inlet and outlet need to avoid disturbing the sediment to avoid affecting the subsequent treatment process. The outlet water is transported by the water pump group 2. In addition, the rainwater recycling reservoir 1 can also be provided with a sludge discharge device to discharge the precipitated sludge in the rainwater recycling reservoir 1, thereby avoiding excessive precipitation affecting the sedimentation effect and the outlet water quality. In addition, the volume of the rainwater recycling reservoir 1 needs to comprehensively consider the amount of rainwater that can be collected, the water demand for rainwater utilization and the investment capacity of the builder. Specifically, the volume of the rainwater recycling reservoir 1 is greater than 10V0, where V0 is the daily water consumption of the outlet equipment 5, that is, the volume of the rainwater recycling reservoir 1 should be guaranteed to be at least 10 times the daily water consumption. This multiple can be adjusted according to different application scenarios. For example, for areas with frequent rainfall, the volume of the rainwater recycling reservoir 1 can be reduced accordingly. In actual application scenarios, the size of the rainwater recovery reservoir 1 is 15000mm×6300mm×4400mm, and its effective volume is 400m 3 The whole structure is made of concrete.

[0044] In this embodiment, the pressure-stabilizing tank 3 provides the outlet pressure when the water outlet device 5 discharges water. During this process, the pressure of the pressure-stabilizing tank 3 will gradually decrease. When the pressure of the pipeline and the pressure-stabilizing tank 3 of the rainwater recycling device is too low, the pressure detected by the pressure sensor 4 will trigger the lower limit contact, and finally the water pump group 2 will be connected to the power supply to start and perform pressure compensation of the pipeline, and charge the pressure-stabilizing tank 3. After the pressure of the pressure-stabilizing tank 3 reaches a predetermined value, the pressure result detected by the pressure sensor 4 will trigger the upper limit contact, and finally the water pump group 2 will be disconnected from the power supply. At this time, the water pump group 2 is turned off.

[0045] The rainwater recycling and utilization device includes a purification and reuse equipment connected to the rainwater recycling reservoir, which is used to filter and disinfect the rainwater. Among them, the purification and reuse equipment may include a pretreatment unit, a primary filtration unit, a secondary filtration unit and a disinfection unit. The pretreatment unit includes a grid, which is used to intercept larger particles of debris, such as leaves, branches, etc., to prevent clogging of subsequent treatment equipment. The primary filtration unit includes a sand filter and an activated carbon filter. The sand filter uses a sand layer as a filter medium to remove fine particles in the water. The activated carbon filter uses the adsorption effect of activated carbon to remove organic matter, chlorine and odor in the water. The secondary filtration unit includes a microfilter and an ultrafilter. The microfilter uses a microporous membrane to filter and remove finer particles and microorganisms. The ultrafilter uses a membrane with a smaller pore size to further remove bacteria and some viruses. The disinfection unit includes an ultraviolet disinfection subunit, a chlorination disinfection subunit, and an ozone disinfection subunit. The ultraviolet disinfection subunit uses ultraviolet rays to irradiate the water body, destroying the DNA structure of microorganisms in the water to achieve a disinfection effect; the chlorination disinfection subunit adds chlorine or chlorine compounds to the water to kill bacteria and viruses through oxidation; the ozone disinfection subunit uses the strong oxidizing properties of ozone to disinfect microorganisms in the water. In addition, in order to reduce the cost of purification and reuse equipment and ensure the stability of water quality during rainwater collection and storage, it is necessary to design the processing time of the purification and reuse equipment to achieve better economic benefits and higher water quality. Specifically, the purification and reuse equipment has a processing time of 1 to 2 hours / r, that is, 1 to 2 hours per day, and the treated water volume is 1 / 2V0 / h to V0 / h, where V0 is the daily water consumption of the water outlet equipment 5.

[0046] The water pump group 2 extends to the bottom of the rainwater recovery reservoir 1 through a pipeline, and a filter is provided on the pipeline located at the bottom of the rainwater recovery reservoir 1. The end of the pipeline located at the bottom of the rainwater recovery reservoir 1 is provided with a bottom valve. The filter is a Y-type filter, which is used to remove solid particles in rainwater to protect downstream equipment from wear and blockage; the filter element of the Y-type filter can be a metal mesh, a stainless steel wire mesh, a filter cloth or other filter materials, which is selected according to the filtration accuracy and fluid characteristics. The bottom valve is used to prevent the fluid from flowing back when the flow stops, ensuring that the fluid can only flow in one direction. The bottom valve only allows the fluid to flow from bottom to top, preventing the fluid from flowing back. There will be no fluid leakage in the closed state; when the fluid flows upward, the bottom valve automatically opens; when the fluid stops flowing or flows in the opposite direction, the bottom valve automatically closes; at the same time, the bottom valve also has a filtering function, which can filter out impurities in the fluid while preventing backflow.

[0047] Pressure sensor 4 is an electric contact pressure gauge. The electric contact pressure gauge includes a measuring unit, an indicating unit, a magnetically assisted electric contact unit, an adjustment unit, a housing, and a junction box. The measuring unit, indicating unit, magnetically assisted electric contact unit, and adjustment unit are housed within the housing, and the junction box is fixed to the housing. The measuring unit measures pressure by elastically deforming a spring tube under the pressure of the measured medium. The indicating unit amplifies and indicates the measured value via a gear transmission mechanism. The magnetically assisted electric contact unit connects corresponding contacts (lower limit contact and upper limit contact) when the pressure reaches a predetermined value (lower limit and upper limit, preferably, the lower limit is 0.3 MPa and the upper limit is 0.6 MPa). The adjustment unit is used to calibrate and adjust the pointer. The housing protects the internal components. The junction box is used to connect electrical components. The operating principle of the electric contact pressure gauge is as follows: When the pressure of the measured medium acts on the spring tube, it forces the end of the spring tube to elastically deform, which is amplified by a pull rod and gear transmission mechanism, and the pointer indicates the measured value on the dial. At the same time, when the contact on the pointer touches the contact on the set pointer, the circuit in the control system is disconnected or connected, achieving automatic control and sending an alarm. The wiring of an electric contact pressure gauge consists of three wires: one common line and two wires connected to the upper and lower limit contacts. In this way, the electric contact pressure gauge can control the upper and lower limit pressures, achieving the purpose of automatic control.

[0048] Pump unit 2 includes multiple vertical multistage centrifugal pumps. These pumps consist of a pump body, rotor, guide wheel, pump cover, bearings, a sealing unit, and a motor. The pump body is the outer shell of the pump and is made of metal to ensure the pump's structural strength. The rotor consists of an impeller, shaft, and coupling. The impeller is the pump's core component, responsible for transporting liquid. Multiple impellers are connected in series via the shaft, each with a specific design to accommodate different head and flow requirements. The guide wheel is located between the impellers, guiding liquid to the next impeller to improve the pump's efficiency. The pump cover covers the upper portion of the pump body and, together with the pump body, forms a sealed liquid transport chamber. The bearings support the rotation of the shaft, reducing friction and ensuring smooth operation. The sealing unit prevents liquid from leaking out of the pump or foreign matter from entering the pump. Sealing methods include mechanical seals and packing seals. The motor provides power to the pump and is directly connected to the pump body, forming an integral unit. The working principle of a vertical multi-stage centrifugal pump is as follows: when the motor drives the shaft and impeller to rotate, the liquid enters the first-stage impeller and is thrown to the guide wheel under the action of centrifugal force. The guide wheel guides the liquid into the next-stage impeller, and the pressure is increased step by step, and finally the required head is achieved. The flow rate and head of the pump can be changed by adjusting the number of impellers or the impeller diameter. The pump body of a vertical multi-stage centrifugal pump is installed vertically, which occupies a small area and is easy to install and maintain. It uses the centrifugal force generated by the rotation of the impeller to transport liquid. It can transport clean water, liquids containing a small amount of solid particles, and chemically stable media. Installation and maintenance:

[0049] To avoid the problem of instability of rainwater in the rainwater recycling reservoir 1 as a miscellaneous water source and replenishment water source due to uncertainty in rainfall, the rainwater recycling device may further include a switching valve and a tap water replenishment device. The switching valve is provided on the pipeline between the water pump assembly and the water outlet device, and the tap water replenishment device is connected to the water outlet device via the switching valve. The tap water replenishment device can realize the tap water replenishment operation of the water outlet device.

[0050] The rainwater recycling device may also include a control cabinet, a water level gauge, and a water quality sensor. The controller is connected to the water pump unit 2, pressure sensor 4, water level gauge, and water quality sensor circuits. The control cabinet uses the upper and lower pressure limits of pressure sensor 4 to trigger the start and stop signals for the water pump unit 2, ultimately regulating the pressure of the water outlet device 5. The water quality sensor uses online monitoring equipment to monitor water quality parameters such as turbidity, pH, and residual chlorine in real time to ensure that the recycled rainwater meets standards.

[0051] When the control cabinet is controlling, it will automatically start when the gas tank pressure reaches the lower limit and automatically stop when it reaches the upper limit.

[0052] like Figure 3 As shown, the relay contacts of this embodiment include a return contact and a voltage-regulating contact, and the relay assembly also includes an electromagnetic drive assembly that matches the relay contacts. The rainwater recycling device also includes a power circuit connected to a power source. The power circuit, return contact, electromagnetic drive assembly, and pressure sensor are connected to form a first circuit, and the power circuit, voltage-regulating contact, and water pump assembly are connected to form a second circuit. The power circuit includes three-phase lines (L1, L2, L3), a neutral line N, and a ground line PE.

[0053] The circuit contacts include a first normally open contact 62, a second normally open contact 63, and a normally closed contact 72; the voltage regulating contact includes a plurality of third normally open contacts 82; the electromagnetic drive assembly includes a first electromagnetic drive assembly 61 matching the first normally open contact 62 and the second normally open contact 63; a second electromagnetic drive assembly 71 matching the normally closed contact 72; and a third electromagnetic drive assembly 81 matching the plurality of third normally open contacts 82;

[0054] One of the phase lines of the power supply circuit is connected to one end of the first electromagnetic drive component 61, the second electromagnetic drive component 71 and the third electromagnetic drive component 81 through the line, the other end of the first electromagnetic drive component 61 is connected to the normally closed contact 72 and one end of the lower limit contact 91 of the pressure sensor 4, the other end of the normally closed contact 72 is connected to the first normally open contact 62 and the neutral line of the power supply circuit in sequence, the other end of the lower limit contact 91 of the pressure sensor 4 is connected to the power supply circuit, the other end of the second electromagnetic drive component 71 is connected to the upper limit contact 92 of the pressure sensor 4 and the neutral line of the power supply circuit in sequence, and the other end of the third electromagnetic drive component 81 is connected to the second normally open contact 63 and the neutral line of the power supply circuit in sequence; the power supply circuit is connected to the water pump group 2 through the line, and a third normally open contact 82 is provided on all lines connecting the power supply circuit and the water pump group 2. In addition, when the relay group of this embodiment is connected, devices such as circuit breakers, fuses, contactors and signal lights can also be set on the first circuit to realize the alarm and protection of the entire circuit. The corresponding settings and connections are conventional settings of those skilled in the art and are not limited here and are not included in the following. Figure 2 In the display, only the main connection lines are shown.

[0055] The control process is as follows: when the pressure reaches (or is lower than) the lower limit when the power is turned on, the lower limit contact 91 of the pressure sensor 4 is triggered. At this time, the circuit where the lower limit contact 91 of the pressure sensor 4 is located is connected, so that the first electromagnetic drive component 61 is energized and acts on the first normally open contact 62 and the second normally open contact 63. The first normally open contact 62 and the second normally open contact 63 are closed under the action of the first electromagnetic drive component 61; wherein, the closing of the second normally open contact 63 causes the third electromagnetic drive component 81 to be energized and act on the third normally open contact 82. The third normally open contact 82 is closed under the action of the third electromagnetic drive component 81 and the water pump group 2 is energized. The energization of the water pump group 2 causes the pressure in the pipeline and the pressure regulating tank 3 to rise. When the pressure reaches the upper limit, the upper limit contact 92 of the pressure sensor 4 is triggered. Here, the circuit where the upper limit contact 92 of the pressure sensor 4 is located is connected, so that the second electromagnetic drive component 71 is energized and acts on the normally closed contact 72. Under the action of the second electromagnetic drive component 71, the normally closed contact 72 is disconnected and the first electromagnetic drive component 61 is de-energized. The de-energization of the first electromagnetic drive component 61 causes the first normally open contact 62 and the second normally open contact 63 to be disconnected, and the third electromagnetic drive component 81 is de-energized. The de-energization of the third electromagnetic drive component 81 causes the third normally open contact 82 to be disconnected, and finally the water pump group 2 is disconnected from the power circuit. This reciprocating process achieves the purpose of automatic control.

[0056] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Clearly, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

Claims

1. A rainwater recycling device, characterized in that: include: Rainwater recovery tank, water pump unit, pressure regulating tank, pressure sensor, water outlet equipment and relay unit; The rainwater recovery reservoir, water pump group and water outlet equipment are connected in sequence through pipelines; The pressure stabilizing tank and pressure sensor are installed on the pipeline between the water pump group and the water outlet equipment; The pressure sensor is provided with a lower limit contact and an upper limit contact, the relay group includes relay contacts, and the relay group is connected to the power supply circuit through the lower limit contact and the upper limit contact; The water pump group is connected to the power supply circuit through the relay contacts; The volume of the rainwater recycling reservoir is greater than 10V0, where V0 is the daily water consumption of the water outlet equipment; the rainwater recycling and utilization device includes purification and reuse equipment connected to the rainwater recycling reservoir; the purification and reuse equipment has a processing time of 1 to 2h / r, and a processed water volume of 1 / 2V0 / h to V0 / h, where V0 is the daily water consumption of the water outlet equipment; the water pump group extends to the bottom of the rainwater recycling reservoir through a pipeline, and a filter is provided on the pipeline located at the bottom of the rainwater recycling reservoir, and a bottom valve is provided at the end of the pipeline located at the bottom of the rainwater recycling reservoir.

2. The rainwater recycling device according to claim 1, characterized in that: The pressure sensor is an electric contact pressure gauge, the pressure bearing value of its lower limit contact is not less than 0.3Mpa, and the pressure bearing value of its upper limit contact is not higher than 0.6MPa.

3. The rainwater recycling device according to claim 1 or 2, characterized in that: The relay contacts include a loop contact and a voltage regulating contact, and the relay group also includes an electromagnetic drive component matched with the relay contacts; The rainwater recycling device also includes a power supply circuit connected to the power supply. The power supply circuit, loop contacts, electromagnetic drive components and pressure sensors are connected to form a first loop. The power supply circuit, voltage regulating contacts and water pump group are connected to form a second loop.

4. The rainwater recycling device according to claim 3, characterized in that: The circuit contact includes a first normally open contact, a second normally open contact, and a normally closed contact; the voltage regulating contact includes a plurality of third normally open contacts; the electromagnetic drive assembly includes a first electromagnetic drive assembly matching the first normally open contact and the second normally open contact, a second electromagnetic drive assembly matching the normally closed contact, and a third electromagnetic drive assembly matching the plurality of third normally open contacts; One phase line of the power supply circuit is connected to one end of the first electromagnetic drive component, the second electromagnetic drive component and the third electromagnetic drive component through the line, the other end of the first electromagnetic drive component is connected to the normally closed contact and one end of the lower limit contact of the pressure sensor, the other end of the normally closed contact is connected to the first normally open contact and the neutral line of the power supply circuit in sequence, the other end of the lower limit contact of the pressure sensor is connected to the power supply circuit, the other end of the second electromagnetic drive component is connected to the upper limit contact of the pressure sensor and the neutral line of the power supply circuit in sequence, and the other end of the third electromagnetic drive component is connected to the second normally open contact and the neutral line of the power supply circuit in sequence; the power supply circuit is connected to the water pump group through the line, and a third normally open contact is provided on all lines connecting the power supply circuit and the water pump group.

5. The rainwater recycling device according to claim 1, characterized in that: It also includes a switching valve, which is arranged on the pipeline between the water pump group and the water outlet equipment.

6. The rainwater recycling device according to claim 1, characterized in that: It also includes a control cabinet, a water level meter and a water quality sensor. The controller is connected to the water pump group, the pressure sensor, the water level meter and the water quality sensor lines respectively.

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