Small environment-friendly water-saving equipment

Abstract

The utility model relates to small environment-friendly water-saving equipment which comprises a water storage tank, a booster pump, a secondary filter, a surge tank and a domestic water inlet which are sequentially connected, the water storage tank comprises a tank body and a primary filter tank fixed to the upper portion of the interior of the tank body, and a water inlet is formed in the primary filter tank to receive sewage; sewage is filtered by the primary filter tank and then discharged into the tank body, and a water outlet of the tank body is positioned below the tank body; the booster pump is arranged at the downstream of the water storage tank; a water inlet of the booster pump is connected with a water outlet of the water storage tank through a main pipeline; the secondary filter is arranged at the downstream of the booster pump, a water inlet of the secondary filter is connected with a water outlet of the booster pump through a main pipeline, and the booster pump is used for pressurizing sewage entering the pump body and then pumping the sewage into the secondary filter. The small environment-friendly water-saving equipment provided by the embodiment of the utility model is simple in structure and low in energy consumption.

Description

Technical Field

[0001] The present application relates to the technical field of environmental protection equipment and facilities, and in particular to a small environmental protection water-saving equipment. Background Art

[0002] The environmental protection industry refers to a collection of activities and services undertaken to protect, improve and repair the environment. Environmental protection equipment is an important product provided in the environmental protection industry. It includes a variety of equipment, tools and technologies used to reduce pollution and protect the environment. Common environmental protection equipment includes wastewater treatment equipment, waste gas treatment equipment, solid waste treatment equipment, noise control equipment, etc. These equipment are widely used in industry, cities, agriculture and other fields to reduce pollutant emissions and resource waste, and protect the health of the environment and ecosystem.

[0003] However, the environmental protection and water-saving equipment in the prior art is generally large in size and consumes a large amount of energy during use. Utility Model Content

[0004] In response to the technical problems existing in the prior art, the present application proposes a small-scale environmentally friendly water-saving device. The small-scale environmentally friendly water-saving device has a simple structure, a small size, and is easy to install and maintain. In addition, since the main energy-consuming structure in the small-scale environmentally friendly water-saving device is a booster pump, it has the advantage of low energy consumption compared to the prior art.

[0005] The embodiment of the present application proposes a small environmental protection and water-saving device, including a water storage tank, a booster pump, a secondary filter, a pressure-stabilizing tank and a domestic water inlet connected in stages, wherein the water storage tank includes a tank body and a primary filter tank fixed on the upper part of the tank body, the primary filter tank is provided with a water inlet to receive sewage, the sewage is filtered by the primary filter tank and then discharged into the tank body, and the water outlet of the tank body is located below the tank body; the booster pump is arranged downstream of the water storage tank, and the water inlet of the booster pump and the water outlet of the water storage tank are connected through a main pipeline; the secondary filter is arranged on the booster pump Downstream of the filter, the water inlet of the secondary filter and the water outlet of the booster pump are connected through a main pipeline. The booster pump is used to pressurize the sewage entering the pump body and pump it into the secondary filter. The secondary filter is used to perform secondary filtration on the incoming sewage. The water outlet of the secondary filter and the domestic water inlet are connected through a main pipeline to transport the domestic water that has passed two-stage filtration through the domestic water inlet; the pressure-stabilizing tank is connected to the main pipeline between the secondary filter and the domestic water inlet through a first branch pipeline, and the pressure-stabilizing tank is used to stabilize the pressure value in the pipeline.

[0006] Optionally, it also includes a second branch pipe, which is connected in parallel at both ends of the secondary filter, the water inlet end of the second branch pipe is connected to the water outlet of the boost pump, the water outlet end of the second branch pipe is connected to the main pipe between the access point of the pressure-stabilizing tank and the water outlet of the secondary filter, and the second branch pipe is provided with a first switch valve; the main pipe between the secondary filter and the water outlet of the boost pump is provided with a second switch valve, and the main pipe between the secondary filter and the access point of the water outlet end of the second branch pipe is provided with a third switch valve; wherein, when the first switch valve is closed, water flowing out of the water outlet of the boost pump is sent to the domestic water inlet through the secondary filter; when the second switch valve and the third switch valve are closed, water flowing out of the water outlet of the boost pump is sent to the domestic water inlet through the second branch pipe.

[0007] Optionally, a pressure gauge is further included, which is arranged on the main pipeline between the domestic water inlet and the pressure-stabilizing tank access point, and is used to measure the pressure in the main pipeline.

[0008] Optionally, the water storage tank further includes an overflow port, wherein the overflow port is opened at a first preset height of the side wall of the tank body, and the overflow port is connected to a floor drain through a pipeline.

[0009] Optionally, the water storage tank further includes a drain port, which is opened at a second preset height of the side wall of the tank body, and the drain port is connected to the floor drain through a pipe, wherein the first preset height is greater than the second preset height.

[0010] Optionally, the water storage tank further includes a liquid level sensor, which is disposed on the side wall of the tank body between the primary filter tank and the water outlet of the water storage tank, and the liquid level sensor is used to control the start and stop of the boost pump according to the water level in the water storage tank.

[0011] Optionally, the pressure stabilizing tank is an airbag pressure tank.

[0012] Optionally, a slow-release disinfection tablet is provided in the water storage space in the tank body, and the slow-release disinfection tablet is used to kill bacteria in the domestic wastewater.

[0013] Optionally, filter cotton is arranged in the primary filter tank.

[0014] Optionally, a PPC composite core is provided in the secondary filter, and the PPC composite core is used to adsorb harmful substances in domestic wastewater.

[0015] The small environmentally friendly water-saving device proposed in this application has the advantages of simple structure, small size, and easy installation and maintenance. In addition, since the main energy-consuming structure in the small environmentally friendly water-saving device is the booster pump, it also has the advantage of low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Below, the preferred embodiments of the present application will be further described in detail with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the connection structure of a small environmental protection and water-saving device according to an embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of a booster pump according to an embodiment of the present application;

[0019] Figure 3 It is a structural schematic diagram of a secondary filter in an embodiment of the present application;

[0020] Figure 4 It is a structural schematic diagram of a pressure-stabilizing tank according to an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 100. Small environmental protection and water-saving equipment; 101. Water storage tank; 102. Booster pump; 103. Secondary filter; 104. Pressure-stabilizing tank; 106. Domestic water inlet; 1011. Tank body; 1012. Primary filter tank; 1013. Water outlet of tank body; 1021. Water inlet; 1022. Water outlet of booster pump; 105. Main pipeline; 107. First branch pipeline; 108. Second branch pipeline; 1041. Pressure-stabilizing tank access point; 1081. First switch valve; 1051. Second switch valve; 1052. Third switch valve; 110. Pressure gauge; 1014. Overflow port; 1015. Vent port; 1016. Liquid level sensor; 1033. PPC composite core; 1044. Air bag; 112. Floor drain; 1042. Access point for the water outlet of the second branch pipeline. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the following detailed description, reference may be made to the various specification drawings that are part of the present application and are used to illustrate specific embodiments of the present application. In the accompanying drawings, similar reference numerals describe substantially similar components in different figures. The various specific embodiments of the present application are described below in sufficient detail so that a person of ordinary skill in the art with relevant knowledge and skills in the art can implement the technical solutions of the present application. It should be understood that other embodiments may also be used or structural, logical or electrical changes may be made to the embodiments of the present application.

[0025] The embodiment of the present application proposes a small environmental protection and water-saving device, including a water storage tank, a booster pump, a secondary filter, a pressure-stabilizing tank and a domestic water inlet connected in stages, wherein the water storage tank includes a tank body and a primary filter tank fixed on the upper part of the tank body, the primary filter tank is provided with a water inlet to receive sewage, the sewage is filtered by the primary filter tank and then discharged into the tank body, and the water outlet of the tank body is located below the tank body; the booster pump is arranged downstream of the water storage tank, and the water inlet of the booster pump and the water outlet of the water storage tank are connected through a main pipeline; the secondary filter is arranged on the booster pump Downstream of the filter, the water inlet of the secondary filter and the water outlet of the booster pump are connected through a main pipeline. The booster pump is used to pressurize the sewage entering the pump body and pump it into the secondary filter. The secondary filter is used to perform secondary filtration on the incoming sewage. The water outlet of the secondary filter and the domestic water inlet are connected through a main pipeline to transport the domestic water that has passed two-stage filtration through the domestic water inlet; the pressure-stabilizing tank is connected to the main pipeline between the secondary filter and the domestic water inlet through a first branch pipeline, and the pressure-stabilizing tank is used to stabilize the pressure value in the pipeline.

[0026] In some embodiments of the present application, optionally, the domestic water inlet and the toilet flushing inlet are connected. During use, the toilet flushing requires a certain pressure requirement, while the water in the water storage tank itself is pressureless. The problem of no pressure in the water storage tank can be solved by adding an automatic booster pump. In addition, the booster pump also has the advantages of small water pressure fluctuations and can stabilize the pressure within a certain pressure range. During installation, it is only necessary to set a target pressure value according to the actual situation of on-site water use. The control system will automatically compare with this target pressure value, and then process it through the data calculation center of the equipment, and then adjust the water pump speed to achieve constant pressure water supply. When the toilet is flushed, the flushing valve opens and the pipeline pressure decreases. The booster pump automatically starts to ensure a constant pressure in the pipeline, and the disinfected domestic wastewater in the water storage tank is pumped into the secondary filter. After being filtered by the secondary filter, it is discharged to the toilet to flush the toilet.

[0027] The small environmental protection water-saving equipment proposed in the present application has the advantages of simple structure, small size, and easy installation and maintenance. In addition, since the main energy-consuming structure in the small environmental protection water-saving equipment is the booster pump, it also has the advantage of low energy consumption.

[0028] In some embodiments of the present application, optionally, a second branch pipe is further included, wherein the second branch pipe is connected in parallel at both ends of the secondary filter, the water inlet end of the second branch pipe is connected to the water outlet of the boost pump, the water outlet end of the second branch pipe is connected to the main pipe between the access point of the pressure regulating tank and the water outlet of the secondary filter, and the second branch pipe is provided with a first switch valve; the main pipe between the secondary filter and the water outlet of the boost pump is provided with a second switch valve, and the main pipe between the secondary filter and the access point of the water outlet end of the delivery branch is provided with a third switch valve; wherein, when the first switch valve is closed, water flowing out of the water outlet of the boost pump passes through the secondary filter and is delivered to the domestic water inlet; when the second switch valve and the third switch valve are closed, water flowing out of the water outlet of the boost pump is delivered to the domestic water inlet through the second branch pipe.

[0029] The second branch pipe and the secondary filter are arranged in parallel in the small environmental protection and water-saving device. A switch valve is arranged on the second branch pipe, and a switch valve is also arranged on the pipe for conveying wastewater to the secondary filter. When in use, whether to enable the secondary filter can be determined by controlling the switch of the switch valve. For example, by setting the second branch pipe, the secondary filter can be omitted when the wastewater pollution level is low, thereby further reducing the consumption of materials.

[0030] In some embodiments of the present application, optionally, a pressure gauge is further included, which is arranged on the main pipeline between the domestic water inlet and the pressure-stabilizing tank access point, and the pressure gauge is used to measure the pressure in the main pipeline.

[0031] Installing a pressure gauge on the main pipeline can visually observe the pipeline pressure, ensuring that the equipment and pipeline will not be damaged due to excessive or insufficient pressure, and can also better match the pressure required by the toilet.

[0032] In some embodiments of the present application, optionally, the water storage tank further includes an overflow port, the overflow port is opened at a first preset height of the side wall of the tank body, and the overflow port is connected to a floor drain through a pipe.

[0033] Setting an overflow port on the water storage tank can ensure that the customized water tank will not overflow and cause secondary pollution.

[0034] In some embodiments of the present application, optionally, the water storage tank further includes a drain port, the drain port is opened at a second preset height on the side wall of the tank body, the drain port is connected to the floor drain through a pipe, wherein the first preset height is greater than the second preset height.

[0035] A drain port is provided on the water storage tank so that the water in the water storage tank can be drained when the equipment is being repaired.

[0036] In some embodiments of the present application, optionally, the water storage tank further includes a liquid level sensor, which is disposed on the side wall of the tank body between the primary filter tank and the water outlet of the water storage tank, and the liquid level sensor is used to control the start and stop of the boost pump according to the water level in the water storage tank.

[0037] The liquid level sensor in the embodiment of the present application can be a capacitive liquid level sensor. When in use, the capacitive liquid level sensor is attached to the outer wall of the tank body to form a capacitive coupling with the liquid in the water reservoir. After amplification and processing, a control signal is output to control the power supply of the booster pump. When the water level in the water reservoir is lower than the set height of the liquid level sensor, the power supply of the booster pump is disconnected to prevent the booster pump from idling. When the water level in the water reservoir is higher than the height of the liquid level sensor, the power supply of the booster pump is controlled to be powered on for a long time.

[0038] In some embodiments of the present application, optionally, the pressure stabilizing tank is an airbag pressure tank.

[0039] As an airbag type pressure-stabilizing tank, the pressure-stabilizing tank contains an airbag, and there is pre-filled nitrogen in the airbag. By utilizing the incompressibility of water, a booster pump is used to store water in the tank. The gas is compressed and the pressure increases. When water is used, the external force disappears and the compressed gas expands to remove the water. The pressure-stabilizing tank is used in the small environmental protection and water-saving equipment of the present application, and it mainly plays the role of an accumulator. When the water pressure of the booster pump is greater than the nitrogen pressure in the airbag, water will be squeezed into the airbag of the pressure-stabilizing tank under the pressure of the booster pump. This will firstly compress the nitrogen between the tank body and the airbag, reduce its volume and increase its pressure; secondly, it will increase the entire water storage space of the equipment, reduce the pressure of the equipment, and stop water intake until the water pressure in the equipment and the nitrogen pressure between the tank body and the airbag reach a new balance. When the water pressure is lower than the gas pressure in the pressure-stabilizing tank, the water in the air bag will be squeezed out under the pressure of the nitrogen between the tank and the air bag, and replenished back to the main pipeline. The volume of the equipment decreases and the pressure rises, the volume of nitrogen between the tank and the air bag increases and the pressure drops until the two reach a new balance, and the water stops being squeezed back from the air bag to the main pipeline. The pressure tank plays the role of regulating the pressure fluctuations of the system.

[0040] In some embodiments of the present application, optionally, a slow-release disinfection tablet is provided in the water storage space in the tank body, and the slow-release disinfection tablet is used to kill bacteria in the domestic wastewater.

[0041] In some embodiments of the present application, optionally, filter cotton is provided in the primary filter tank.

[0042] In some embodiments of the present application, optionally, a PPC composite core is provided in the secondary filter, and the PPC composite core is used to adsorb harmful substances in domestic wastewater.

[0043] The primary filter tank uses filter cotton to filter out impurities and suspended solids in domestic wastewater to prevent impurities from accumulating in the water tank. The secondary filter uses a PPC composite core to absorb chlorine and bleach in the water, ensuring the safety of water quality and the normal use of pipes and devices using filtered wastewater.

[0044] The above describes the implementation method and technical advantages of the small environmental protection water-saving device of the present application through multiple embodiments. The following describes the structure and use process of the small environmental protection water-saving device in combination with specific examples.

[0045] Figure 1 Schematic diagram of the connection structure of a small environmental protection and water-saving device in the embodiment of the present application. Figure 1 As shown, the small environmental protection and water-saving device 100 includes a water storage tank 101, a booster pump 102, a secondary filter 103, a pressure-stabilizing tank 104 and a domestic water inlet 106 connected in stages. Among them, the water storage tank 101 includes a tank body 1011 and a primary filter tank 1012 fixed on the upper part of the tank body 1011. The primary filter tank 1012 is provided with a water inlet (not shown in the figure) to receive sewage. The sewage is filtered by the primary filter tank 1012 and discharged into the tank body 1011. The water outlet 1013 of the tank body 1011 is located below the tank body 1011. In some embodiments of the present application, optionally, a slow-release disinfection tablet is provided in the water storage space in the tank body 1011, and the slow-release disinfection tablet is used to kill bacteria in domestic wastewater. In some embodiments of the present application, optionally, a filter cotton is provided in the primary filter tank 1012.

[0046] Figure 2 Schematic diagram of the structure of a booster pump according to an embodiment of the present application. Figure 1 and Figure 2 As shown, the booster pump 102 is arranged downstream of the water storage tank 101 , and the water inlet 1021 of the booster pump 102 and the water outlet 1013 of the water storage tank 101 are connected through the main pipeline 105 . Figure 3 Schematic diagram of the structure of a secondary filter in an embodiment of the present application. Figure 1 and Figure 3As shown, the secondary filter 103 is arranged downstream of the boost pump 102, and the water inlet of the secondary filter 103 and the water outlet 1022 of the boost pump 102 are connected through the main pipeline 105. The boost pump 102 is used to pressurize the sewage entering the pump body of the boost pump 102 and pump it into the secondary filter 103, and the secondary filter 103 is used to perform secondary filtration on the incoming sewage. In some embodiments of the present application, optionally, a PPC composite core 1033 is provided in the secondary filter 103, and the PPC composite core 1033 is used to absorb harmful substances in domestic wastewater. The water outlet of the secondary filter 103 and the domestic water inlet 106 are connected through the main pipeline 105, so as to transport the domestic water that has been filtered in two stages through the domestic water inlet 106.

[0047] Continue to see Figure 1 As shown, the pressure stabilizing tank 104 is connected to the main pipeline 105 between the secondary filter 103 and the domestic water inlet 106 through the first branch pipeline 107, and the pressure stabilizing tank 104 is used to stabilize the pressure value in the pipeline. It should be noted that the pipelines that the pressure stabilizing tank 104 can stabilize include the main pipeline and each branch pipeline. Figure 4 Schematic diagram of the structure of a pressure stabilizing tank in an embodiment of the present application. Figure 4 As shown, the pressure stabilizing tank 104 is a bladder-type pressure tank, and the pressure stabilizing tank includes a bladder 1044 .

[0048] Further, the small environmental protection water-saving device 100 also includes a second branch pipe 108, which is connected in parallel to both ends of the secondary filter 103, the water inlet end of the second branch pipe 108 is connected to the water outlet 1022 of the booster pump 102, the water outlet end of the second branch pipe 108 is connected to the main pipe 105 between the pressure stabilizing tank access point 1041 and the water outlet of the secondary filter 103, and the second branch pipe 108 is provided with a first switch valve 1081. A second switch valve 1051 is provided on the main pipe 105 between the secondary filter 103 and the water outlet of the booster pump 102, and a third switch valve 1052 is provided on the main pipe 105 between the secondary filter 103 and the water outlet access point 1042 of the second branch pipe. When the first switch valve 1081 is closed, the water flowing out of the water outlet of the booster pump 102 is sent to the domestic water inlet 106 through the secondary filter 103. When the second switch valve 1051 and the third switch valve 1052 are closed, water flowing out of the water outlet of the booster pump 102 is delivered to the domestic water inlet 106 through the second branch pipe 108 .

[0049] In some embodiments of the present application, optionally, the small environmentally friendly water-saving device 100 also includes a pressure gauge 110, which is arranged on the main pipeline 105 between the domestic water inlet 106 and the pressure regulating tank access point 1041, and the pressure gauge 110 is used to measure the pressure in the main pipeline 105.

[0050] Continue to see Figure 1 As shown, the water storage tank 101 also includes an overflow port 1014, a drain port 1015 and a liquid level sensor 1016, wherein the overflow port 1014 is opened at a first preset height of the tank side wall, and the overflow port 1014 is connected to the floor drain 112 through a pipe. The drain port 1015 is opened at a second preset height of the tank side wall, and the drain port 1015 is connected to the floor drain 112 through a pipe, wherein the first preset height is greater than the second preset height. The liquid level sensor 1016 is arranged on the tank side wall between the primary filter tank 1012 and the water outlet 1013 of the tank body, and the liquid level sensor 1016 is used to control the start and stop of the booster pump 102 according to the water level in the water storage tank 101.

[0051] In summary, based on the above embodiments, the present application has the following advantages:

[0052] 1. During use, the small environmentally friendly water-saving equipment of the present application can efficiently collect the water generated by daily washing and temporarily store it. By adopting reliable filtering technology and disinfection measures, these can be converted into clean and safe reused water sources, which can be used for toilet flushing. The small environmentally friendly water-saving equipment of the present application can not only improve the utilization rate of water resources and reduce the waste of water resources, but also conform to the current core concept of water conservation and environmental protection.

[0053] 2. The small environmentally friendly water-saving equipment of this application is conducive to assisting in achieving a high degree of automated control, without the need for an additional automatic control box. In conjunction with the liquid level sensor of the water storage tank and the water flow sensor of the booster pump, the equipment intelligently senses the changes in water level and water flow, realizes the start-stop function, and avoids the idling problem of the booster pump caused by the absence of water in the water storage tank, ensuring the stable operation of the equipment and the safety of the pump body, while improving the efficiency and reliability of the overall operation.

[0054] 3. The material selection and design of the water storage tank in the embodiment of the present application fully considers the differences in water quality and the diversity of the placement environment. Specifically, a variety of material options can be used, including PE, stainless steel, fiberglass, etc., to meet the needs of different application scenarios. This flexibility enables the device of the present application to easily cope with various complex environments and ensure long-term stable operation.

[0055] 4. In terms of equipment maintenance, the small environmental protection and water-saving equipment of this application adopts a modular design concept, which makes the connection between the pipeline and each device more convenient. Through flange or threaded connection methods, it can be quickly disassembled and installed, which greatly simplifies the maintenance process. At the same time, this design also facilitates the maintenance and replacement of the equipment, improves work efficiency, and reduces maintenance costs.

[0056] 5. The small environmental protection and water-saving equipment of the present application also performs well in space utilization. During use, the length, width and height of the water storage tank can be flexibly adjusted according to the space limitations of the installation location to maximize the use of the existing space. This design enables the equipment of the present application to adapt to various installation environments and provide users with a more flexible and efficient solution.

[0057] The above embodiments are only used to illustrate the present application, and are not intended to limit the present application. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the scope of the present application. Therefore, all equivalent technical solutions should also fall within the scope disclosed in the present application.

Claims

1. A small environmental protection and water-saving device, characterized in that: It includes a water storage tank, a booster pump, a secondary filter, a pressure regulating tank and a domestic water inlet connected in stages, among which: The water storage tank comprises a tank body and a primary filter tank fixed on the upper part of the tank body, the primary filter tank is provided with a water inlet to receive sewage, the sewage is filtered by the primary filter tank and then discharged into the tank body, and the water outlet of the tank body is located below the tank body; The booster pump is arranged downstream of the water storage tank, and the water inlet of the booster pump and the water outlet of the water storage tank are connected through a main pipeline; The secondary filter is arranged downstream of the booster pump, the water inlet of the secondary filter and the water outlet of the booster pump are connected through a main pipeline, the booster pump is used to pressurize the sewage entering the pump body and then pump it into the secondary filter, the secondary filter is used to perform secondary filtration on the entering sewage, the water outlet of the secondary filter and the domestic water inlet are connected through a main pipeline, so as to transport the domestic water that has been filtered in two stages out through the domestic water inlet; The pressure stabilizing tank is connected to the main pipeline between the secondary filter and the domestic water inlet through the first branch pipeline, and the pressure stabilizing tank is used to stabilize the pressure value in the pipeline.

2. The small environmental protection and water-saving device according to claim 1 is characterized in that: It also includes a second branch pipeline, which is connected in parallel to both ends of the secondary filter, the water inlet end of the second branch pipeline is connected to the water outlet of the booster pump, the water outlet end of the second branch pipeline is connected to the main pipeline between the access point of the pressure stabilizing tank and the water outlet of the secondary filter, and the second branch pipeline is provided with a first switch valve; A second switch valve is provided on the main pipeline between the secondary filter and the water outlet of the booster pump, and a third switch valve is provided on the main pipeline between the secondary filter and the access point of the water outlet end of the second branch pipeline; Wherein, when the first switch valve is closed, the water flowing out from the water outlet of the booster pump passes through the secondary filter and is sent to the domestic water inlet; When the second switch valve and the third switch valve are closed, water flowing out from the water outlet of the booster pump is delivered to the domestic water inlet through the second branch pipeline.

3. The small environmental protection and water-saving device according to claim 1 is characterized in that: It also includes a pressure gauge, which is arranged on the main pipeline between the domestic water inlet and the pressure-stabilizing tank access point, and is used to measure the pressure in the main pipeline.

4. The small environmental protection and water-saving device according to claim 1 is characterized in that: The water storage tank also includes an overflow port, which is opened at a first preset height of the side wall of the tank body and is connected to a floor drain through a pipeline.

5. The small environmental protection and water-saving device according to claim 4 is characterized in that: The water storage tank also includes a drain port, which is opened at a second preset height on the side wall of the tank body and is connected to the floor drain through a pipeline, wherein the first preset height is greater than the second preset height.

6. The small environmental protection and water-saving device according to claim 1 is characterized in that: The water storage tank also includes a liquid level sensor, which is arranged on the side wall of the tank body between the primary filter tank and the water outlet of the water storage tank. The liquid level sensor is used to control the start and stop of the boost pump according to the water level in the water storage tank.

7. The small environmental protection and water-saving device according to claim 1 is characterized in that: The pressure stabilizing tank is an air bag type pressure tank.

8. The small environmental protection and water-saving device according to claim 1 is characterized in that: A slow-release disinfection tablet is arranged in the water storage space in the tank body, and the slow-release disinfection tablet is used to kill bacteria in the sewage.

9. The small environmental protection and water-saving device according to claim 1, characterized in that: Filter cotton is arranged in the primary filter tank.

10. The small environmental protection and water-saving device according to claim 1, characterized in that: The secondary filter is provided with a PPC composite core, and the PPC composite core is used for absorbing harmful substances in sewage.

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