Wastewater secondary utilization water-saving toilet

Abstract

A water-saving toilet that reuses wastewater comprises a sink water collection system, a wastewater collection and flushing system, a water-saving control system, and a toilet body. The wastewater collection and flushing system is integrated into the toilet body and shares the same system as the original toilet flushing system. The sink water collection system has a water-saving drain and the original drain at its lower part. The lower end of the water-saving drain is connected to the inlet of the wastewater collection and flushing system via a water-saving pipe. The lower end of the original drain is connected to the sewer pipe via a return bend. A two-way valve system controlling the opening and closing of the water-saving drain and the original drain is installed at the lower part of the sink water collection system. A water filtration system is installed on the water-saving pipe. The water-saving control system is connected to both the wastewater collection and flushing system and the two-way valve system. This invention reduces the frequency of using the original toilet tank, utilizes more wastewater for flushing, achieves wastewater reuse, effectively saves water resources, and reduces users' water bills and wastewater treatment costs.

Description

Technical Field

[0001] This invention relates to the field of resource conservation and utilization technology, specifically to a water-saving toilet that utilizes wastewater for secondary purposes. Background Technology

[0002] Water resources are an indispensable resource in human daily life and production. From washing and cooking to industrial production, water is needed everywhere. With the improvement of the quality of life of Chinese residents and the rapid development of industrialization, used water, or wastewater, has become a problem to be solved. According to the water resource utilization rate in Chinese cities, residential water use accounts for 35%, and the amount of water resources that can be reused is enormous.

[0003] Although sewage treatment plants are located in various parts of my country, the water used in daily life and production is in an intermediate state, neither meeting the standards for residential use nor requiring treatment. This results in every drop of water being unused and flowing into the sewers.

[0004] The incomplete utilization of water resources means that Chinese residents need to invest more money in water for daily life and production. At the same time, the wastewater discharged into sewage treatment plants also requires investment in treatment. This not only leads to excessive investment in water use and treatment, but also results in the waste of water resources.

[0005] How to effectively conserve and utilize water resources has become a widely concerned issue. Currently, there is an urgent need for a system and method for water conservation in the civilian sector, equipment that achieves efficient water saving and improves water resource utilization in this area, providing a solid guarantee for alleviating national water shortages and promoting the transformation of the water-saving industry. Summary of the Invention

[0006] The purpose of this invention is to provide a water-saving toilet that reuses wastewater. This invention can reduce the frequency of use of the original toilet tank and make more use of wastewater to flush the toilet, thereby realizing the reuse of wastewater, effectively saving water resources, and reducing users' water bills and wastewater treatment costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A water-saving toilet that reuses wastewater includes a sink water collection system, a wastewater collection and flushing system, a water-saving control system, and a toilet body. The wastewater collection and flushing system is installed on the toilet body and shares the same flushing system as the original toilet. The sink water collection system has a water-saving drain and a original drain at its lower part. The lower end of the water-saving drain is connected to the inlet of the wastewater collection and flushing system through a water-saving pipe. The lower end of the original drain is connected to the sewer pipe through a return bend. A two-way valve system that controls the opening and closing of the water-saving drain and the original drain is installed at the lower part of the sink water collection system. A water filtration system is installed on the water-saving pipe. The water-saving control system is connected to the wastewater collection and flushing system and the two-way valve system respectively.

[0009] The handwashing basin water collection system includes the main body of the washbasin. A liquid guiding slope is provided in the middle of the inner bottom of the main body of the washbasin. The water-saving drain and the original drain are symmetrically arranged vertically at the bottom left and bottom right of the main body of the washbasin about the liquid guiding slope. The water-saving control system is located at the bottom of the main body of the washbasin.

[0010] The water-saving control system includes a first battery compartment and a PLC controller. The first battery compartment is electrically connected to the PLC controller, and the PLC controller is connected to the wastewater collection and flushing system and the two-way valve system respectively.

[0011] The wastewater collection and flushing system includes a wastewater tank, a liquid level sensor, a fragrance reservoir, and a liquid level gauge. The wastewater tank is located on the rear side of the toilet body, behind the original toilet tank. Both the wastewater tank and the original toilet tank have the same flushing system. The inlet of the wastewater tank is located at its lower rear side. The two ends of the water-saving pipe are connected to the lower end of the water-saving drain and the inlet of the wastewater tank, respectively. The liquid level sensor is fixedly installed at the top of the wastewater tank. The fragrance reservoir is located at the bottom of the wastewater tank. The liquid level gauge is vertically installed on the side wall of the wastewater tank. The PLC controller is connected to the liquid level sensor signal.

[0012] The bidirectional valve system includes a bidirectional piston slider and two electromagnetic drive systems. A conduit located between the water-saving drain and the original drain is horizontally arranged in the left-right direction between the main body of the washbasin and the PLC controller. A through hole with the same cross-section as the conduit is opened on the right side wall of the water-saving drain corresponding to the left end of the conduit and on the left side wall of the original drain corresponding to the right end of the conduit. The bidirectional piston slider is slidably installed in the conduit. Magnetic induction elements are provided at both ends of the bidirectional piston slider. The length of the bidirectional piston slider is less than the length of the conduit and the sum of the left and right dimensions of the water-saving drain or the original drain. The two electromagnetic drive systems are symmetrically arranged on the left outer wall of the water-saving drain and the right outer wall of the original drain, respectively. The two electromagnetic drive systems drive the bidirectional piston slider to slide left and right in the conduit, respectively. The PLC controller is connected to the two electromagnetic drive systems.

[0013] When the electromagnetic drive system on the left is working, the bidirectional piston slider slides to the left until its left end extends into the water-saving drain and presses against the inner wall on the left side of the water-saving drain. The bidirectional piston slider blocks the water-saving drain, and the original drain opens. When the electromagnetic drive system on the right is working, the bidirectional piston slider slides to the right until its right end extends into the original drain and presses against the inner wall on the right side of the original drain. The bidirectional piston slider blocks the original drain, and the water-saving drain opens.

[0014] The two electromagnetic drive systems have the same structure. The electromagnetic drive system on the left includes an electromagnet, a second battery compartment, and an electromagnetic controller. The electromagnet, the second battery compartment, and the electromagnetic controller are fixedly installed on the outer left side of the water-saving drain. The second battery compartment is electrically connected to the electromagnet and the electromagnetic controller respectively. The electromagnetic controller is signal-connected to the electromagnet, and the PLC controller is signal-connected to the electromagnetic controller.

[0015] The water filtration system includes a filter tube, a large particle filter screen, a fibrous filter screen, an activated carbon adsorption filter screen, and a pigment adsorption filter screen. The filter tube is coaxially installed on a section of the water-saving pipe. The large particle filter screen, fibrous filter screen, activated carbon adsorption filter screen, and pigment adsorption filter screen are coaxially installed and spaced apart in the filter tube along the direction of fluid flow.

[0016] A guide hole is provided on the top wall of the conduit along the left and right direction, and a manual dial ring is fixedly installed in the middle of the top surface of the bidirectional piston slider, which passes through the guide hole upward.

[0017] This invention possesses significant substantive features and substantial advancements compared to existing technologies. Specifically, its working principle is as follows: A liquid level sensing resistor is used in conjunction with a liquid level gauge to monitor the liquid level inside the wastewater tank in real time. When the liquid level sensing resistor fails to detect that the liquid level in the wastewater tank has reached its peak value, the PLC controller controls the left-side electromagnetic controller to de-energize the left-side electromagnet, and the PLC controller controls the right-side electromagnetic controller to energize the right-side electromagnet. The right-side electromagnet generates a magnetic force that attracts the magnetic induction body at the right end of the bidirectional piston slider, causing the bidirectional piston slider to slide to the right until its right end extends into the original drain outlet and presses against the inner wall of the right side of the original drain outlet. The bidirectional piston slider then blocks the original drain outlet, saving water. When the drain is open, wastewater from daily use in the main body of the sink will be discharged from the water-saving drain into the water-saving pipe. The wastewater flows downwards through the filter pipe and is filtered by a large particle filter, a fiber filter, an activated carbon adsorption filter, and a pigment adsorption filter to meet usage standards. The filtered wastewater is then stored in the wastewater tank. When the liquid level sensor detects that the liquid level in the tank has reached its peak value, the sensor is triggered and transmits a signal to the PLC controller. The PLC controller then controls the left-side electromagnetic controller to energize the left electromagnet, and the right-side electromagnetic controller to de-energize the right electromagnet, causing the left electromagnet to generate a magnetic force. The magnetic induction element at the left end of the bidirectional piston slider causes it to slide to the left until its left end extends into the water-saving drain outlet and presses against the inner wall of the left side of the outlet. This seals the drain outlet, opening the original drain. Wastewater from daily use in the sink will then drain from the original outlet and flow into the sewer system via the return bend. After use, the user flushes the toilet using the wastewater tank. Once most of the water in the tank is used, the level sensor no longer detects the peak level and sends a signal to the PLC controller. The PLC controller then controls the electromagnetic controller on the left side to... When the electromagnet is de-energized, the PLC controller controls the right-side electromagnet to energize it. The electromagnet generates a magnetic force that attracts the magnetic induction body at the right end of the bidirectional piston slider, causing the bidirectional piston slider to slide to the right until its right end extends into the original drain outlet and presses against the inner wall of the original drain outlet on the right side. The bidirectional piston slider blocks the original drain outlet, and the water-saving drain outlet opens. The wastewater after use can then be discharged from the water-saving drain outlet back into the main body of the washbasin, and after passing through the water-saving pipe and filter, it is replenished into the wastewater tank. This reduces the frequency of use of the original toilet tank, allowing more wastewater to be used for flushing the toilet, achieving wastewater reuse, effectively saving water resources, and reducing the user's water bill and wastewater treatment costs.

[0018] Large particle filters are used to filter out large particles such as sand and stones, preventing them from clogging the water-saving pipe and affecting its use; fibrous filters are used to entangle and block fibrous materials such as hair and fine threads in the water flow, preventing them from clogging the water-saving pipe or causing water flow obstruction.

[0019] Activated carbon adsorption filters are used to adsorb pathogens in water, reducing the bacterial count in the water to below the national standard lower limit, thus ensuring the health of users.

[0020] Pigment adsorption filters are used to adsorb pigments in water, restoring the original color of the water as much as possible so that users will not feel nauseous when using them.

[0021] The fragrance chamber is used to store fragrance enhancers to neutralize unpleasant odors in wastewater, providing users with a comfortable environment.

[0022] If special circumstances prevent the bidirectional piston slider from sliding left and right automatically, such as when one or both electromagnets malfunction, the user can manually adjust the bidirectional piston slider using the manual dial.

[0023] This invention can reduce the frequency of use of the original toilet tank, make more use of wastewater to flush the toilet, realize the secondary use of wastewater, effectively save water resources, and reduce users' water bills and wastewater treatment costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is an assembly diagram of the handwashing basin water collection system, water-saving control system, and two-way valve system of the present invention.

[0026] Figure 3 This is a schematic diagram of the water filtration system of the present invention.

[0027] Figure 4 This is a front view of the large particle filter, fibrous filter, activated carbon adsorption filter, and pigment adsorption filter of the present invention.

[0028] Figure 5 This is a schematic diagram of the wastewater collection and flushing system of the present invention installed on the toilet body. Implementation

[0029] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0030] like Figure 1-5As shown, a water-saving toilet that reuses wastewater includes a sink water collection system, a wastewater collection and flushing system, a water-saving control system, and a toilet body 1. The wastewater collection and flushing system is installed on the toilet body 1 and shares the same system as the original toilet flushing system. The sink water collection system has a water-saving drain 2 and a original drain 3 at its lower part. The lower end of the water-saving drain 2 is connected to the inlet of the wastewater collection and flushing system through a water-saving pipe 4. The lower end of the original drain 3 is connected to the sewer pipe through a return bend 5. A two-way valve system that controls the opening and closing of the water-saving drain 2 and the original drain 3 is installed at the lower part of the sink water collection system. A water filtration system is installed on the water-saving pipe 4. The water-saving control system is connected to the wastewater collection and flushing system and the two-way valve system respectively.

[0031] The handwashing basin water collection system includes a washbasin body 6, with a liquid guiding slope 7 (conventional structure) set in the middle of the inner bottom of the washbasin body 6. The water-saving drain 2 and the original drain 3 are symmetrically set vertically at the bottom left and bottom right of the washbasin body 6 about the liquid guiding slope 7, respectively. The water-saving control system is set at the bottom of the washbasin body 6.

[0032] The water-saving control system includes a first battery compartment 8 and a PLC controller 9. The first battery compartment 8 is electrically connected to the PLC controller 9, and the PLC controller 9 is connected to the wastewater collection and flushing system and the two-way valve system respectively.

[0033] The wastewater collection and flushing system includes a wastewater tank 10, a liquid level sensing resistor 11, a fragrance chamber 12, and a liquid level gauge 13. The wastewater tank 10 is located on the rear side of the toilet body 1 and behind the original toilet tank 25. Both the wastewater tank 10 and the original toilet tank 25 are equipped with the same flushing system. The water inlet of the wastewater tank 10 is located at its lower rear side. The two ends of the water-saving pipe 4 are respectively connected to the lower end of the water-saving drain 2 and the water inlet of the wastewater tank 10. The liquid level sensing resistor 11 is fixedly installed at the top inside the wastewater tank 10. The fragrance chamber 12 is installed at the bottom of the wastewater tank 10. The liquid level gauge 13 is vertically installed on the side wall of the wastewater tank 10. The PLC controller 9 is connected to the liquid level sensing resistor 11.

[0034] The bidirectional valve system includes a bidirectional piston slider 14 and two sets of electromagnetic drive systems. A conduit 15, located between the main body of the washbasin 6 and the PLC controller 9 and horizontally arranged in the left-right direction, connects the water-saving drain 2 and the original drain 3. A through hole with the same cross-section as the conduit 15 is opened on the right side wall of the water-saving drain 2 corresponding to the left end of the conduit 15 and on the left side wall of the original drain 3 corresponding to the right end of the conduit 15. The bidirectional piston slider 14 is slidably installed in the conduit 15. Magnetic induction bodies are provided at both ends of the bidirectional piston slider 14. The length of the bidirectional piston slider 14 is less than the length of the conduit 15 and the sum of the left and right dimensions of the water-saving drain 2 or the original drain 3. The two sets of electromagnetic drive systems are symmetrically arranged on the left outer wall of the water-saving drain 2 and the right outer wall of the original drain 3, respectively. The two sets of electromagnetic drive systems drive the bidirectional piston slider 14 to slide left and right in the conduit 15, respectively. The PLC controller 9 is connected to the two sets of electromagnetic drive systems.

[0035] When the electromagnetic drive system on the left is working, the bidirectional piston slider 14 slides to the left until its left end extends into the water-saving drain 2 and presses against the inner wall on the left side of the water-saving drain 2. The bidirectional piston slider 14 blocks the water-saving drain 2, and the original drain 3 is opened. When the electromagnetic drive system on the right is working, the bidirectional piston slider 14 slides to the right until its right end extends into the original drain 3 and presses against the inner wall on the right side of the original drain 3. The bidirectional piston slider 14 blocks the original drain 3, and the water-saving drain 2 is opened.

[0036] The two electromagnetic drive systems have the same structure. The electromagnetic drive system on the left includes an electromagnet 16, a second battery compartment 17, and an electromagnetic controller 18. The electromagnet 16, the second battery compartment 17, and the electromagnetic controller 18 are fixedly installed on the outer left side of the water-saving drain outlet 2. The second battery compartment 17 is electrically connected to the electromagnet 16 and the electromagnetic controller 18 respectively. The electromagnetic controller 18 is signal-connected to the electromagnet 16, and the PLC controller 9 is signal-connected to the electromagnetic controller 18.

[0037] The water filtration system includes a filter pipe 19, a large particle filter screen 20, a fiber filter screen 21, an activated carbon adsorption filter screen 22, and a pigment adsorption filter screen 23. The filter pipe 19 is coaxially installed on a section of the water-saving pipe 4. The large particle filter screen 20, the fiber filter screen 21, the activated carbon adsorption filter screen 22, and the pigment adsorption filter screen 23 are coaxially installed and spaced apart in the filter pipe 19 along the direction of fluid flow.

[0038] A guide hole is provided on the top wall of the conduit 15 along the left and right direction, and a manual dial ring 24 is fixedly provided in the middle of the top surface of the bidirectional piston slider 14, which passes through the guide hole upward.

[0039] The main body of the washbasin (6), the liquid guiding slope (7), the PLC controller (9), the liquid level sensing resistor (11), the liquid level gauge (13), the electromagnet (16), and the electromagnetic controller (18) are all conventional technologies that can be purchased on the market. Their specific structures and working principles will not be elaborated further. The automatic control and signal control in this invention are all conventional control technologies and do not involve new computer programs.

[0040] The working principle of this invention is as follows: The liquid level sensing resistor 11 is used in conjunction with the liquid level gauge 13 to monitor the liquid level inside the wastewater tank 10 in real time. When the liquid level sensing resistor 11 does not detect that the liquid level inside the wastewater tank 10 has reached its peak value, the PLC controller 9 controls the left electromagnetic controller 18 to de-energize the left electromagnet 16, and the PLC controller 9 controls the right electromagnetic controller 18 to energize the right electromagnet 16. The right electromagnet 16 generates a magnetic force to attract the magnetic induction body at the right end of the bidirectional piston slider 14, causing the bidirectional piston slider 14 to slide to the right until its right end extends into the original drain outlet 3 and presses against the inner wall of the right side of the original drain outlet 3. The bidirectional piston slider 14 blocks the original drain outlet 3, and the water-saving drain outlet 2 opens. Then, in daily life, the user can use the main body of the washbasin. After use, the wastewater from the six outlets is discharged from the water-saving drain 2 into the water-saving pipe 4. The wastewater flows downwards through the filter pipe 19 and is filtered by the large particle filter 20, fiber filter 21, activated carbon adsorption filter 22, and pigment adsorption filter 23 to meet usage standards. The filtered wastewater is then stored in the wastewater tank 10. When the liquid level sensing resistor 11 senses that the liquid level in the wastewater tank 10 has reached its peak value, the liquid level sensing resistor 11 is triggered and transmits a signal to the PLC controller 9. The PLC controller 9 controls the left electromagnetic controller 18 to energize the left electromagnet 16, and controls the right electromagnetic controller 18 to de-energize the right electromagnet 16. The left electromagnet 16 then generates a magnetic force to attract the bidirectional piston slider 14. The magnetic induction body at the left end causes the bidirectional piston slider 14 to slide to the left until its left end extends into the water-saving drain outlet 2 and presses against the inner wall of the left side of the water-saving drain outlet 2. The bidirectional piston slider 14 blocks the water-saving drain outlet 2, and the original drain outlet 3 is opened. Then, the wastewater from the user's daily use in the main body of the washbasin 6 will be discharged from the original drain outlet 3 and enter the sewer pipe through the return water bend 5. After the user finishes using the toilet, the water in the wastewater tank 10 can be used to flush the toilet. After most of the water in the wastewater tank 10 is used up, the liquid level sensing resistor 11 can no longer sense that the liquid level in the wastewater tank 10 has reached the peak liquid level. The liquid level sensing resistor 11 will then transmit a signal to the PLC controller 9 again. The PLC controller 9 controls the electromagnetic controller 18 on the left side to make the electromagnet 1 on the left side... When power is cut off, the PLC controller 9 controls the electromagnetic controller 18 on the right side to energize the electromagnet 16 on the right side. The electromagnet 16 generates a magnetic force that attracts the magnetic induction body at the right end of the bidirectional piston slider 14, causing the bidirectional piston slider 14 to slide to the right until its right end extends into the original drain outlet 3 and presses against the inner wall of the right side of the original drain outlet 3. The bidirectional piston slider 14 blocks the original drain outlet 3, and the water-saving drain outlet 2 opens. The wastewater after use can then be discharged from the water-saving drain outlet 2 back into the main body of the washbasin 6, and after passing through the water-saving pipe 4 and filter, it is replenished into the wastewater tank 10. This reduces the frequency of use of the original toilet tank 25, and allows more wastewater to be used for flushing the toilet, realizing the secondary use of wastewater, effectively saving water resources, and reducing the user's water bill and wastewater treatment costs.

[0041] Large particle filter 20 is used to filter large particles such as sand and stones to prevent them from clogging the water-saving pipe 4 and affecting its use; fibrous filter 21 is used to wrap and block fibrous materials such as hair and fine threads in the water flow to prevent them from clogging the water-saving pipe 4 or causing water flow obstruction.

[0042] Activated carbon adsorption filter 22 is used to adsorb pathogens in water, reducing the bacterial content in the water to below the national standard lower limit, thus ensuring the health of users.

[0043] Pigment adsorption filter 23 is used to adsorb pigments in the water, restoring the original color of the water as much as possible so that users will not feel nauseous when using it.

[0044] The fragrance chamber 12 is used to place fragrance enhancers to neutralize unpleasant odors in wastewater, providing users with a comfortable environment.

[0045] If special circumstances prevent the bidirectional piston slider 14 from sliding automatically left and right, such as when one or both electromagnets 16 fail to work properly, the user can manually adjust the bidirectional piston slider 14 using the manual dial 24.

[0046] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A water-saving toilet for secondary wastewater utilization, characterized in that: The toilet includes a sink water collection system, a wastewater collection and flushing system, a water-saving control system, and a toilet body. The wastewater collection and flushing system is installed on the toilet body and shares the same system as the original toilet flushing system. The sink water collection system has a water-saving drain and the original drain at the bottom. The lower end of the water-saving drain is connected to the inlet of the wastewater collection and flushing system through a water-saving pipe. The lower end of the original drain is connected to the sewer pipe through a return bend. The sink water collection system is equipped with a two-way valve system that controls the opening and closing of the water-saving drain and the original drain. A water filtration system is installed on the water-saving pipe. The water-saving control system is connected to the wastewater collection and flushing system and the two-way valve system respectively. The handwashing basin water collection system includes the main body of the washbasin. A liquid guiding slope is provided in the middle of the inner bottom of the main body of the washbasin. The water-saving drain and the original drain are symmetrically arranged vertically at the bottom left and bottom right of the main body of the washbasin about the liquid guiding slope. The water-saving control system is located at the bottom of the main body of the washbasin. The water-saving control system includes a first battery compartment and a PLC controller. The first battery compartment is electrically connected to the PLC controller, and the PLC controller is connected to the wastewater collection and flushing system and the two-way valve system respectively. The wastewater collection and flushing system includes a wastewater tank, a liquid level sensor, a fragrance chamber, and a liquid level gauge. The wastewater tank is located on the rear side of the toilet body and behind the original toilet tank. Both the wastewater tank and the original toilet tank are equipped with the same flushing system. The inlet of the wastewater tank is located at its lower rear side. The two ends of the water-saving pipe are connected to the lower end of the water-saving drain and the inlet of the wastewater tank, respectively. The liquid level sensor is fixedly installed at the top of the wastewater tank. The fragrance chamber is located at the bottom of the wastewater tank. The liquid level gauge is vertically installed on the side wall of the wastewater tank. The PLC controller is connected to the liquid level sensor signal. The bidirectional valve system includes a bidirectional piston slider and two electromagnetic drive systems. A conduit located between the water-saving drain and the original drain is horizontally arranged in the left-right direction between the main body of the washbasin and the PLC controller. A through hole with the same cross-section as the conduit is opened on the right side wall of the water-saving drain corresponding to the left end of the conduit and on the left side wall of the original drain corresponding to the right end of the conduit. The bidirectional piston slider is slidably installed in the conduit. Magnetic induction elements are provided at both ends of the bidirectional piston slider. The length of the bidirectional piston slider is less than the length of the conduit and the sum of the left and right dimensions of the water-saving drain or the original drain. The two electromagnetic drive systems are symmetrically arranged on the left outer wall of the water-saving drain and the right outer wall of the original drain, respectively. The two electromagnetic drive systems drive the bidirectional piston slider to slide left and right in the conduit, respectively. The PLC controller is connected to the two electromagnetic drive systems. When the electromagnetic drive system on the left is working, the bidirectional piston slider slides to the left until its left end extends into the water-saving drain and presses against the inner wall on the left side of the water-saving drain. The bidirectional piston slider blocks the water-saving drain, and the original drain opens. When the electromagnetic drive system on the right is working, the bidirectional piston slider slides to the right until its right end extends into the original drain and presses against the inner wall on the right side of the original drain. The bidirectional piston slider blocks the original drain, and the water-saving drain opens.

2. The wastewater secondary utilization water-saving toilet according to claim 1, characterized in that: The two electromagnetic drive systems have the same structure. The electromagnetic drive system on the left includes an electromagnet, a second battery compartment, and an electromagnetic controller. The electromagnet, the second battery compartment, and the electromagnetic controller are fixedly installed on the outer left side of the water-saving drain. The second battery compartment is electrically connected to the electromagnet and the electromagnetic controller respectively. The electromagnetic controller is signal-connected to the electromagnet, and the PLC controller is signal-connected to the electromagnetic controller.

3. The wastewater secondary utilization water-saving toilet according to claim 1, characterized in that: The water filtration system includes a filter tube, a large particle filter screen, a fibrous filter screen, an activated carbon adsorption filter screen, and a pigment adsorption filter screen. The filter tube is coaxially installed on a section of the water-saving pipe. The large particle filter screen, fibrous filter screen, activated carbon adsorption filter screen, and pigment adsorption filter screen are coaxially installed and spaced apart in the filter tube along the direction of fluid flow.

4. The wastewater secondary utilization water-saving toilet according to claim 1, characterized in that: A guide hole is provided on the top wall of the conduit along the left and right direction, and a manual dial ring is fixedly installed in the middle of the top surface of the bidirectional piston slider, which passes through the guide hole upward.

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