WO2017133527A1

WO2017133527A1 - Domestic waste water reuse system and waste water reuse method

Info

Publication number: WO2017133527A1
Application number: PCT/CN2017/072138
Authority: WO
Inventors: 许升; 宋华诚; 田书君; 单世强
Original assignee: 青岛海尔滚筒洗衣机有限公司
Priority date: 2016-02-03
Filing date: 2017-01-23
Publication date: 2017-08-10
Also published as: CN107034952A

Abstract

Provided is a domestic waste water reuse system, comprising a water tank (6) for containing waste water, wherein the water tank (6) is internally provided with a draining pump (7), a water outlet (19) of the draining pump connects two water paths: a first water path (20) is connected to a water containing cavity (13) of a toilet and a second water path (15) is connected to a water injection pipeline (21) so as to inject water to the draining pump (7) via a water injection nozzle (22) of the water injection pipeline. A waste water reuse method for the domestic waste water reuse system is also provided.

Description

Household wastewater reuse system and wastewater reuse method

Technical field

The invention relates to the field of domestic sewage treatment and recycling, in particular to a domestic wastewater utilization system and a wastewater reuse method.

Background technique

At present, the toilets of urban households in China are all washed with tap water. Each flush requires 6-8 liters of tap water, which wastes water resources and discharges a large amount of sewage. In urban household water use, it mainly consists of two parts, one is to flush the toilet water, the other is the laundry and bath water, and the waste water produced by the laundry is alkaline water, which can meet the requirements of flushing the toilet. Therefore, research on the use of waste water generated by washing or the like to flush toilets has been attracting attention in recent years.

In the prior art, the wastewater reuse toilet flushes the water of the washing machine to a water tank, and the water tank is connected with the toilet water chamber. When the water level of the toilet water chamber is low, the water pump in the water tank is sent to the toilet water chamber, and the toilet water is filled. When the water level of the cavity is high, the water pump is turned off. The Chinese patent application No. CN201420773086.7 discloses an automatic control device for flushing the toilet with waste water. The toilet water storage tank and the waste water storage tank of the invention are connected by a pipeline, and a water pump is arranged on the pipeline. The water level in the toilet water storage tank is detected, and the electric control circuit is based on the water level detection result of the water storage tank. When the toilet is flushed, the toilet water storage tank is at a low water level, and the water pump is controlled to open the water storage tank, and the water level of the toilet water storage tank When rising to a high water level, the control pump is turned off to stop the water supply and the choice between wastewater flushing or tap water flushing is achieved.

The principle of water absorption of the existing water pump is that the rotation of the impeller forms a thrust to pull out the water inside the water pump and then create a negative pressure inside the water pump. Then, under the action of atmospheric pressure, the water in the waste water storage tank is again pressurized into the water pump. Once the air is mixed into the pump, the air will increase or compress in volume with the pressure of the impeller, so that there is not enough pressure on the outlet side of the pump to push the water in the pipeline. The water in the waste water storage tank cannot enter the inside of the water pump, and the water pump plugging phenomenon occurs. Moreover, due to the entry of air, dry friction is easily formed in the water pump, which damages the water pump. For the above problems, the current market pumps are provided with exhaust ports. Before the pump runs, open the exhaust port and empty the air inside the pump. Once there is water overflowing from the exhaust port, it is proved that the air has been drained. At this time, the exhaust port is sealed. But in the water pump During operation, the washing water coming from the waste water storage tank is easily mixed with air bubbles, and it is inevitable that the water in the low water level is sucked by the water pump. Therefore, if the gas plugging phenomenon is not avoided in time, the wastewater reuse system will not be able to be used normally. If the closed exhaust port is opened for the normal use of the wastewater reuse system, the exhaust gas is exhausted again, so that the user needs to perform a very cumbersome row. Gas work, causing inconvenience.

The present invention has been made in view of the above.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a household wastewater recycling system, which can directly flush the water tank and the toilet, and can use the waste water to flush the toilet, and set the drain pump in the water tank to improve the water tank capacity. The water space solves the problem that the drainage pump has low heat dissipation efficiency after the water level in the water tank drops.

In order to solve the above technical problems, the basic idea of adopting the technical solution of the present invention is:

The invention provides a domestic wastewater reuse system, comprising a water tank for containing waste water, wherein the water tank is provided with a drainage pump, the water outlet of the drainage pump is connected to two water passages, and the first water passage is connected with the toilet water chamber. The second waterway is in communication with the water spray pipe, and the water spray port of the water spray pipe is sprayed to the drain pump.

Further, the water tank is provided with an exhaust port, the position of the exhaust port is higher than the corresponding position of the maximum water level of the water tank, and the exhaust pipe is connected between the second water path and the exhaust port.

Further, the exhaust pipe and the water spray pipe are in communication with the second water passage through the three-way reversing valve.

Further, the diameter of the pipe of the water spray pipe is smaller than the pipe diameter of the first water pipe, and the pipe diameter of the exhaust pipe is smaller than the pipe diameter of the first water pipe.

Further, the first waterway is provided with a drain valve and a pressure detecting device in the direction from the drain pump outlet to the toilet water chamber.

Further, the pressure detecting device is a pressure sensor, and the pressure sensor is provided with a measuring interface that communicates with the pipeline.

Further, the pressure sensor includes a first housing provided with a measuring interface, a second housing around which an inductive coil is disposed, and an elastic diaphragm is fixed at a joint of the first housing and the second housing The elastic diaphragm is connected to the first housing through an elastic member toward a side of the measuring interface, and the elastic diaphragm is provided with a core on the other side, and the iron core passes through the second elastic member and the second shell Body connection.

Further, the pressure sensor includes a first housing provided with a measuring interface, a third housing provided with an opening, and an elastic diaphragm is fixed at a joint of the first housing and the third housing. The elastic diaphragm is connected to the first housing via an elastic member on one side of the measuring interface, and the other side of the elastic diaphragm is connected to a conductive sheet projecting from the opening of the third housing.

The invention also provides a method for recycling wastewater of the above household wastewater reuse system. After the drain pump is turned on, the air in the drain pump is discharged, the second waterway and the water spray pipeline are turned on, and the spray nozzle is sprayed through the spray pipeline. Water to drain pump.

Further, the water level in the water tank is detected. When the water level drops until the drain pump fails to fully immerse below the water surface, the second water path and the water spray line are turned on, and water is sprayed to the drain pump.

Further, when it is detected that the water level in the water tank drops until the drainage pump fails to be completely immersed below the water surface, the timing is started, and after the drain pump works for a set time, the second water path and the water spray line are turned on, and the drain pump is sprayed with water.

Further, the pressure detecting device detects a pressure on the first waterway, and when the pressure drops to a first set value, the drain pump opens to supply water to the toilet, and when the pressure rises to a second When the value is set, the drain pump stops supplying water to the toilet.

Further, when the pressure rises to the second set value for the first time period, the drain pump stops supplying water to the toilet, preferably, the first time period and the time of filling the water of the toilet water chamber under different pressures More preferably, when the pressure rises to the second set value or rises to the second set value for the first time period, the drain valve is closed first, and then the drain pump is closed.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

The invention provides a household wastewater recycling system, wherein the water tank and the toilet water chamber are connected by a pipeline, and the household waste water is stored in the water tank in a centralized manner, and a drain pump and a drain valve are arranged on the pipeline, and the user connects one end of the pipeline to the water tank On the other end, the other end is connected to the toilet water chamber, and the toilet can be flushed with waste water. The drain pump communicates with the toilet water chamber through the drain valve. When the toilet water chamber needs to be replenished, the drain valve opens and the drain valve opens to the toilet. Water chamber water supply, through which the domestic wastewater can be effectively utilized, saving water resources; a pressure detecting device is arranged on the pipeline between the drain valve and the toilet water chamber, and the tube between the detecting drain valve and the toilet water chamber is used The pressure on the road determines the water level in the toilet water chamber, and a signal line is connected between the pressure detecting device and the drain pump and the drain valve, and the water supply to the toilet is stopped or the water supply to the toilet is stopped. The technical solution of the present invention is realized in the toilet Outside the water level detection, there is no need to install a water level detection probe in the toilet water storage tank or a reed switch outside the toilet water storage tank, without modifying the toilet. The utility model has the advantages of simple structure and low cost; and an exhaust port is opened above the side of the water tank, and an exhaust pipe is connected to the pipeline between the drain pump and the drain valve. The other end of the exhaust pipe communicates with the exhaust port. During the reuse of the wastewater, after the drain pump is turned on, if there is air mixed in the water coming out of the water tank, it will be discharged through the exhaust pipe after entering the exhaust pump to avoid the drain pump. There is a phenomenon of air embolism.

And the present invention provides a domestic wastewater reuse system, the drain pump is provided with a bottom in the water tank, and the existing water tank portion does not need to be higher than the drain pump, and the bottom of the water tank is not wasted, compared with the existing drain pump disposed at the bottom of the water tank. The volume of the tank can be as close as possible to the bottom of the tank, which increases the water capacity of the tank.

And the household wastewater reuse system includes a water spray pipeline. During the water supply process of the drain pump, when the water level in the water tank drops, the water spray port of the spray pipeline sprays water to the drain pump, sprays the drain pump, and sprays the water. The heat is dissipated on the drain pump to solve the problem that the drain pump relies on water to dissipate heat after the water level of the water tank is lowered, and the heat dissipation efficiency is low.

The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

DRAWINGS

1 is a schematic diagram of a domestic wastewater reuse system according to an embodiment of the present invention;

2 is a schematic structural view of a pressure sensor according to Embodiment 3 of the present invention;

3 is a schematic structural view of a pressure sensor according to Embodiment 3 of the present invention;

4 is a schematic diagram of a household wastewater recycling system according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a household wastewater reuse system according to an embodiment of the present invention; FIG.

In the figure: washing machine 1, washing machine water dividing valve 2, first drain pipe 3, second drain pipe 4, overflow pipe 5, water tank 6, drain pump 7, water dividing valve 8, first branch 81, second branch 82. Drain valve 9, pressure sensor 10, water pipe 11, toilet 12, toilet water chamber 13, water pipe 14, first casing 101, second casing 111, third casing 121, elastic diaphragm 102, inductance The coil 103, the elastic member 104, the second elastic member 114, the iron core 105, the conductive sheet 106, the power source electric shock 107 of the drain pump, the measurement interface 108, the second water path 15, the valve 16, the exhaust port 17, the overflow port 18, and the drain The pump water outlet 19, the first water path 20, the water spray line 21, the water spray port 22, the three-way valve 23, and the exhaust line 24.

detailed description

The embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is not intended to limit the scope of the invention.

As shown in FIG. 1 , a domestic wastewater reuse system provided by an embodiment of the present invention includes a water tank 6 for containing waste water, a drain pump 7 is disposed in the water tank 6, and a drain pump 7 is disposed at the bottom of the water tank, and the drain pump 7 A drain pump outlet 19 is provided, and the drain pump outlet 19 communicates with the two water passages, wherein the first water passage 20 communicates with the toilet water chamber 13, the drain pump supplies water to the toilet water chamber, and is drained by the drain on the first water passage 20. The nozzle 19 is provided with a drain valve 9 and a pressure detecting device in the direction of the toilet, and the pressure detecting device may be the pressure sensor 10. The water outlet 19 of the drain pump is connected to the water spray pipe 21 via the second water passage 15 , and one end of the water spray pipe 21 communicating with the water tank 6 is provided with a water spray port 22 , and the water tank 6 is provided with a port that can communicate with the water spray port. The position of the mouth is higher than the position corresponding to the maximum water level of the water tank, and one end of the water spray pipe 21 away from the water spray port 22 communicates with the second water path 15 through the valve 16. The pipe diameter of the water spray pipe 21 is smaller than the pipe diameter of the first water passage 20 and smaller than the pipe diameter of the second water passage 15.

Further, the water tank 6 is provided with an overflow port 18, and the overflow port 18 is connected to the overflow pipe 5, and the position of the exhaust port 17 is higher than the position of the overflow port 18.

A pressure detecting device is provided on the line between the drain valve 9 and the toilet water chamber 13, and the pressure detecting device is connected to the drain pump 7. The pressure detecting means can control the opening and closing of the drain pump 7 and the drain valve 9. Specifically, the pressure detecting device is a pressure sensor 10, and the drain valve 9 is disposed on a line close to the toilet 12.

Before use by the user, one end of the first water passage 20 of the system is connected to the drain pump water outlet 19, and the other end of the first water passage 20 is connected to the water inlet (not shown) on the toilet water chamber 13 without The water level detecting probe is installed in the toilet water storage tank or the dry reed pipe is arranged outside the toilet water storage tank, and the toilet tank is not directly modified, and the water tank containing the waste water and the toilet are directly connected through the water pipe 11 to flush the toilet with the waste water, and the structure is simple. The pressure detecting means detects the pressure in the line between the drain valve 9 and the toilet water chamber 13, and judges the water level in the toilet water chamber 13 by the detected pressure change.

The water tank 6 is used for containing household waste water, such as waste water generated by laundry, waste water of a wash basin, etc. As shown in FIG. 1 , the drain pipe of the washing machine 1 has a washing machine water dividing valve 2, and the washing machine water dividing valve 2 is connected to the first drain pipe 3 And the second drain pipe 4, can be switched so that the last rinse water is discharged into the water tank 6 via the second drain pipe 4, so that the waste water is stored and reused, or at the control end of the washing machine, the user can input the amount of the rinse water, for example, The number of rinses is two, and the user can choose to keep the last rinse water or retain all the rinse water twice, or choose to keep the wash water. After the selection, the washing water and the rinsing water which are not required to be retained in the washing process are discharged into the sewage pipe through the first drain pipe 3, and the retained water is discharged into the water tank 6 by the pump. The water tank 6 can be provided separately or placed at the bottom of the washing machine and integrated with the washing machine. A water dividing valve 8 is disposed at the first water passage 20 near the drain pump water outlet 19, and the water dividing valve 8 includes a first branch 81 and The second branch 82, the first branch 81 is connected to the water pipe 11 through the drain valve 9, and leads to the toilet water chamber 13. The first branch 81 is opened, the second branch 82 is closed, and the toilet is supplied with water; the second branch 82 is connected to the sewer, the first branch 81 is closed, and the second branch 82 is opened to discharge unnecessary water in the water tank 6. Or clean the sediment in the water tank 6.

Embodiment 1

In the present embodiment, when the water tank 6 is used for the first time or when the user cleans the water tank 6 again, there may be a certain amount of gas in the drain pump 7. When there is water in the pipeline downstream of the drain pump 7, the gas in the drain pump is subjected to gas. When the downstream water is squeezed, the gas in the drain pump cannot be discharged. When the drain pump is working, the rotating shaft of the drain pump is in contact with the air, causing idling, and then the air plug phenomenon occurs, affecting the normal use of the wastewater reuse system, and the drain pump shaft It is easy to be burned out and also reduces the service life of the drain pump.

In order to solve the above problem, as shown in FIG. 1, the drain pump water outlet 19 communicates with the water tank 6 through the second water passage 15, the water spray conduit 21, and the water spray port 22, and the upper portion of the water tank 6 opens to communicate with the water spray port 22. (not shown) and the position of the port is higher than the highest water level in the water tank, and the air inside the drain pump 7 can be discharged from the water spray port 21 through the water spray pipe 21 to the water level in the water tank 6 through the water spray pipe 21 through the water spray pipe 21. The above space avoids the phenomenon of air plugging of the drain pump 7. After the air in the drain pump 7 is exhausted by the exhaust pipe, a small amount of water discharged simultaneously with the gas can be returned to the water tank 6 via the above-mentioned pipe. Further, the diameter of the pipe of the water spray pipe 21 is much smaller than the diameter of the water pipe of the first water pipe 20 and the second water pipe 15, so that after the drain pump 7 is operated, a large amount of water is pumped by the drain pump to the toilet water chamber via the first water pipe 20. 13, the effect of the exhaust process on the lowering of the water supply speed of the toilet water chamber 13 is avoided.

Further, in addition to the above embodiment, the second water passage 15 and the water spray pipe 21 communicate with each other through the valve 16, and the above-described exhaust process can be controlled. Specifically, after the drain pump 7 is turned on, the valve 16 is opened, and the second water path 15 and the water spray line 21 are turned on. After repeated research and testing by the technician, the valve 16 is opened within 3 seconds after the drain pump 7 is started, so that the gas is made. It can be discharged, avoid the phenomenon of air plugging, ensure the normal operation of the drain pump 7, so that the domestic wastewater reuse system can be used normally, and the service life of the drain pump can also be improved; the valve 16 is closed after the valve 16 is opened for 3-10 seconds to ensure that the valve 16 is closed. The gas is completely discharged, and the second waterway is prevented from diverting the water supply from the first waterway 20 to the toilet water chamber 13. The above-mentioned scheme can effectively prevent the water supply speed to the toilet water chamber from being lowered, and the water flow is reduced to the water. The noise generated by the water tank 6.

Embodiment 2

As shown in FIG. 1 , the drain pump 7 is disposed at the bottom of the water tank 6 , and as the water is continuously pumped to the toilet water chamber 13 , the water level in the water tank gradually decreases, and since the drain pump 7 is disposed in the water tank, the heat dissipation is mainly achieved by intruding into the water. When the water level drops, The housing of the drainage pump gradually emerges from the water surface, and the heat dissipation efficiency of the drainage pump is reduced, which will affect the working efficiency of the drainage pump, and even cause the drainage pump to be overheated and damaged, which affects the normal use of the domestic wastewater reuse system. In order to solve the above problem, the drain pump water outlet 19 communicates with the water tank 6 via the second water passage 15 and the water spray pipeline 21, and one end of the spray water pipeline 21 is provided with a water spray port 22, and the water tank 6 is opened to communicate with the water spray port. A port (not shown) is provided on the water tank 6, and the port is disposed at a position higher than the top of the drain pump 7, and the water spout 22 is opened toward the drain pump 7. After the exhaust, the water pumped by the drain pump 7 is supplied to the toilet water chamber 13 through the drain pump water outlet 19 and the first water passage 20, and the other water pumped by the drain pump 7 passes through the drain pump outlet 19 The water channel 15 and the water spray line 21 are sprayed onto the drain pump 7 by the water spray port 22 to dissipate heat from the drain pump 7 to prevent the motor of the drain pump from overheating.

Further, the water spray pipe 21 communicates with the second water passage 15 through the valve 16, and the spray to the drain pump 7 can be controlled. Specifically, when the drain pump 7 is working for a short time, the temperature of the motor of the drain pump is not high, and at this time, the valve 16 is in a closed state, and the drain pump 7 is not sprayed, and the water is supplied to the toilet water chamber 13 in a concentrated manner, and the water supply efficiency is high; the drain pump After working for a period of time, the temperature of the motor of the drain pump rises. At this time, the valve 16 is opened, the water spray line 21 and the second water path 15 are turned on, and the other water pumped by the drain pump 7 is discharged through the drain pump 19, The water channel 15 and the water spray pipe 21 are sprayed onto the drain pump 7 by the water spray port 22, and sprayed to the drain pump 7 to cool down. Specifically, the drain pump 7 is a submersible pump, and the start time of the submersible pump spray cooling can be set after the pump is operated for a certain period of time. For example, after the pump starts to operate for 60 seconds, the valve 16 is opened to cool the pump casing. The above solution can effectively solve the problem that the drainage pump relies on water to dissipate heat after the water level of the water tank is lowered, and the heat dissipation efficiency is low.

Embodiment 3

As shown in FIG. 4, on the basis of the above embodiment, the second waterway 15 communicates with the water spray pipe 21, and the second waterway 15 also communicates with the exhaust pipe 24, and the exhaust port 17 is opened above the water tank 6, and the exhaust port 17 is above the highest water level in the tank. The drain pump outlet 19 is divided into two pipelines through the second water passage 15, one of which communicates with the spray pipe 21 to cool down the drain pump 7, and the other communicates with the exhaust pipe 24 to discharge the drain pump 7. Air, to avoid the phenomenon of air plugging in the drain pump 7.

The water spray pipe 21 communicates with the second water passage 15 through the valve 16, and controls the spraying of the drain pump 7. When the drain pump 7 is working for a short time, the motor temperature of the drain pump is not high, the valve 16 is closed, the drain pump 7 is not sprayed, and the water is supplied to the toilet water chamber 13 in a concentrated manner, and the water supply efficiency is high; after the drain pump works for a period of time, the drain pump The temperature of the motor rises, the valve 16 is opened, and the water spray line 21 and the second water path 15 are turned on. When the exhaust valve 16 is closed, the water supply pipe 21 is prevented from diverting the water supplied from the first water passage 20 to the toilet water chamber 13. Further, the diameters of the exhaust pipe 24 and the water spray pipe 21 are much smaller than the first pipe diameter. The water pipe diameter of the water passage 20 and the second water passage 15 avoids the diversion of the water supply from the first water passage 20 to the toilet water chamber 13 by the exhaust passage 24, and improves the water supply speed to the toilet water chamber 13.

Embodiment 4

As shown in FIG. 5, on the basis of the above embodiment, the second water passage 15 communicates with the water spray line 21 and the exhaust line 24 through the three-way valve 23, and the water spray line 21 is realized by controlling the three-way valve 23 The exhaust lines 24 are respectively turned on. Above the water tank 6, there is an exhaust port 17, which is higher than the highest water level in the water tank. The control three-way valve 23 turns on the second water path 15 and the exhaust line 24 to discharge the air in the drain pump 7 to prevent the drain pump 7 from appearing a gas plug phenomenon; the control three-way valve 23 turns on the second water path 15 and the water spray pipe In the road 21, the water pumped by the drain pump 7 is cooled by the drain pump water outlet 19 through the second water passage 15, the three-way valve 24 spray pipe 21, and the water spray port 22 to spray the drain pump 7. The above embodiment does not need to separately provide a valve on the water spray pipe 21, and controls the switching of the exhaust pipe and the water spray pipe by controlling the three-way valve 23, simplifies the domestic wastewater reuse system, and is closed by controlling the three-way valve 24. The exhaust pipe and the water spray pipe avoid the shunting of the water supply to the toilet water chamber 13 by the above two pipes, and improve the water supply speed to the toilet water chamber 13.

Embodiment 5

As shown in FIG. 1, on the basis of the above embodiment, in the wastewater reuse method of the present embodiment, the pressure detecting device detects the pressure on the water pipe 11, and when the pressure drops to the first set value, the drain pump 7 is turned on. The toilet is supplied with water, and when the pressure rises to the second set value, the drain pump 7 stops supplying water to the toilet.

The pressure sensor 10 detects the pressure in the water pipe between the drain valve 9 and the toilet water chamber 13. When the toilet flushes, the water passage at the toilet end is opened. At this time, the drain valve 9 is closed, the drain valve 9 and the toilet water chamber The pressure in the pipeline between the 13 is lowered, and the pressure is reduced by the pressure sensor 10, and it can be judged that the flushing action of the toilet is performed, and the amount of water in the toilet water chamber 13 is reduced, and it is necessary to supplement the toilet water chamber 13 Water, so that the toilet performs the next flushing action, when the pressure drops to the first set value, the pressure sensor 10 sends a signal to control the drain pump 7 to open to supply water to the toilet. The drain valve 9 may specifically be a one-way valve. After the drain pump 7 stops working, the water flow does not flow back to the drain pump side, and the pressure in the water pipe between the drain valve 9 and the toilet water chamber 13 is maintained. .

When water is supplied to the toilet, the water distribution valve 8 opens to the first branch 81 of the toilet, the drain valve 9 is simultaneously opened, and the drain pump 7 pumps the waste water stored in the water tank 6 to the toilet water chamber 13, and the toilet water The water level in the chamber 13 is raised and filled, the water pipe 11 is gradually filled with water, and the pressure in the water pipe 11 is gradually increased by the pressure sensor 10. When the pressure rises to the second set value, the pressure sensor 10 sends a signal to control the drain pump. 7 Stop supplying water to the toilet. When it is judged that the toilet water level is full, when the drain pump 7 is not stopped, the drain valve 9 is first closed, and the pressure of the drain valve 9 to the toilet water chamber 13 is maintained close to the state of the drain pump 7, and then closed. The drain pump 7 is drained so that the toilet water chamber 13 is filled with water.

It should be noted that the first set value and the second set value are preset values according to different drain pump heads and toilet water chamber capacity, as exemplified below, for example, the lift of the drain pump 7 used is 10 meters. Toilet water chamber 13 During the process of gradually filling the water, the toilet water supply pipe is gradually filled with water, and when the pressure sensor 10 detects that the pressure in the water pipe 11 is gradually increased to 0.1 MPa, it is judged that the toilet water chamber 13 has been filled with water. During the flushing of the toilet water chamber 13, the pressure in the pipeline water pipe 11 is gradually decreased by the pressure sensor 10, and it can be set that when the pressure is reduced to 0.3 MPa, it is determined that the toilet water chamber 13 needs water injection, and can be opened. The drain pump supplies water to the toilet.

Embodiment 6

In the process of supplying water to the toilet through the drain pump 7, if the power supply voltage of the drain pump fluctuates or the performance of the different drain pumps is different, the actual lift of the drain pump is affected, and the pressure sensor 10 detects that the pressure reaches a preset value. In the second set value, the toilet water chamber 13 is not filled; or the drain pump continues to operate because the detected pressure has not reached the preset second set value. For example, the rated head of the drain pump is 10 meters, and 1 bar is set as the second set value. When the pressure sensor 10 detects that the pressure reaches 1 bar, the drain pump stops supplying water to the toilet, but in actual situations, the voltage may be low. When the actual lift of the drain pump is 9 meters, the drain pump pressure is too low, so that the pressure sensor 10 detects that the pressure cannot reach the second set value. When the power supply voltage is high, the lift pump head will be slightly larger than 10 meters. When the pressure sensor 10 detects that the pressure reaches 1 bar, the toilet water chamber may not be filled, which may affect the next flush of the toilet.

In order to solve the above problem, the time required to supply water to the drain pump is corrected according to the filling time of the toilet water chamber under different pressures. As shown in FIG. 1 , on the basis of the above embodiment, the household wastewater reuse system wastewater reuse method according to the embodiment, when the pressure rises to the second set value for the first time, the drain pump 7 stops to the toilet Water supply. Among them, the first duration is related to the time of filling the water in the toilet water chamber under different pressures. When the power supply voltage is high, the drain pump head will be slightly larger. When the pressure sensor 10 detects that the pressure reaches the preset second set value, the toilet water chamber may not be filled, for example, if the water supply pressure is 1 bar. When the time of filling the toilet water chamber 13 is 30 seconds, when the pressure sensor 10 detects that the pressure reaches 1 bar, the drain pump 7 can be turned off again after 30 seconds, so that the toilet water chamber may not be filled. Happening. If the drain pump pressure is too low, the pressure sensor 10 detects that the pressure cannot reach the second set value, for example, if the toilet water chamber 13 is at a water supply pressure of 0.8 bar, the time for filling the toilet is 40 seconds, although the pressure sensor 10 The detected pressure does not reach 1 bar, the water supply time of the drain pump is controlled according to the operation for 40 seconds, and the toilet water chamber may not be filled. If the test pressure continues to be less than 0.5 bar for more than 40 seconds during normal operation, it can be judged that the air plug in the pipeline has not been eliminated, or during the operation of the pump, the air bubbles on the surface of the water level are formed by the lower water level to form a gas plug. The drain valve 9 is closed and the valve 16 is opened to eliminate the air lock.

Example 7

As shown in FIG. 1 to FIG. 3, based on the above embodiment, the pressure detecting device in the household wastewater reuse system of the present embodiment is a pressure sensor, and the pressure sensor 10 is provided with a measuring interface 108 that communicates with the water pipe 11. . The pressure sensor 10 includes a first housing 101 provided with a measurement interface 108, a second housing 111 around which the inductor 103 is wound, and an elastic diaphragm is fixed at a joint of the first housing 101 and the second housing 111. 102, the elastic diaphragm 102 is connected to the first housing 101 through the elastic member 104 on one side of the measuring interface 108, and the iron core 105 is disposed on the other side of the elastic diaphragm 102, and the iron core 105 passes through the second elastic member 114 and the second The housing 111 is connected. The elastic member 104 can be a spring. When the pressure in the water pipe 11 is measured, the pressure changes, and the elastic diaphragm 102 of the pressure sensor 10 generates a deformation variable under the driving of the elastic member 104. The iron core 105 is driven by the elastic diaphragm 102 and the second elastic member 114 along the inductance. The coil 103 moves in the axial direction, and the inductance value of the inductor changes, that is, the inductance of the inductor and the displacement of the core correspond to an approximately linear change, and the displacement of the core corresponds to the measured water pressure, for example, When the pressure is less than 0.3MPa, it means that the toilet has been flushed, and the drain pump can be turned on to supply water to the toilet water chamber.

Further, the pressure sensor 10 includes a first housing 101 provided with a measurement interface 108, and a third housing 121 provided with an opening, and an elastic diaphragm 102 is fixed at a joint of the first housing 101 and the third housing 121, The elastic diaphragm 102 is connected to the first housing 101 via the elastic member 104 toward the side of the measurement interface 108, and the other side of the elastic diaphragm 102 is connected to the conductive sheet 106 which is extendable from the opening of the third housing 121. When the pressure of the water pipe 11 is measured, the pressure changes, and the elastic diaphragm 102 of the pressure sensor 10 generates a deformation variable under the driving of the elastic member 104, and the deformation movement of the elastic diaphragm 102 pushes the movement of the conductive sheet 106, and the third casing 121 is provided. The opening, the conductive sheet 106 can protrude from the third housing through the opening. When the pressure is increased, the elastic member 104 pushes the elastic diaphragm 102 upward to push the conductive sheet 106 to move upward, when the conductive sheet 106 moves to and controls the drain pump 7. When the power contacts are in contact, the drain pump 7 is turned on to supply water to the toilet. When the pressure is reduced, the elastic member 104 pulls the elastic diaphragm 102 downward to pull the conductive sheet 106 downward, and when the conductive sheet 106 moves out of contact with the power contact of the drain pump 7, the drain pump 7 stops supplying water to the toilet. . When the pressure sensor shown in FIG. 3 is used, the pressure sensor 10 and the drain pump 7 are connected without a signal line, and the pressure sensor 10 can be directly connected or disconnected from the power contact of the drain pump 7, and the drain pump 7 can be controlled to open and close. .

It should be noted that the embodiments in the above embodiments may be further combined or substituted, and the embodiments are merely described for the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Various changes and modifications made by those skilled in the art to the technical solutions of the present invention are within the scope of the present invention.

Claims

A domestic wastewater reuse system includes a water tank for containing waste water, wherein the water tank is provided with a drainage pump, and the water outlet of the drainage pump is connected to two water passages, and the first water passage is connected with the toilet water chamber. The second waterway is in communication with the water spray pipe, and the water spray port of the spray pipe is sprayed to the drain pump.
The domestic wastewater reuse system according to claim 1, wherein the water tank is provided with an exhaust port, and the position of the exhaust port is higher than a position corresponding to a maximum water level of the water tank, and between the second water channel and the exhaust port. Connect an exhaust line.
The domestic wastewater reuse system according to claim 2, wherein the exhaust pipe and the water spray pipe are in communication with the second water passage through the three-way switching valve.
The household wastewater reuse system according to claim 2 or 3, wherein the pipe diameter of the water spray pipe is smaller than the pipe diameter of the first water pipe, and the pipe diameter of the exhaust pipe is smaller than that of the first waterway. Tube diameter.
The domestic wastewater reuse system according to claim 1, wherein the first water passage is provided with a drain valve and a pressure detecting device in the direction from the drain pump outlet to the toilet water chamber.
A domestic wastewater reuse system according to claim 5, wherein said pressure detecting means is a pressure sensor, and said pressure sensor is provided with a measuring interface in communication with said pipe.
A domestic wastewater reuse system according to claim 6, wherein said pressure sensor comprises a first housing provided with a measuring interface, a second housing around which an inductive coil is wound, said first housing and An elastic diaphragm is fixed to the joint of the second casing, and the elastic diaphragm is connected to the first casing through an elastic member toward one side of the measuring interface, and the iron foil is disposed on the other side of the elastic diaphragm The iron core is coupled to the second housing by a second elastic member.
A domestic wastewater reuse system according to claim 6, wherein said pressure sensor comprises a first housing provided with a measurement interface, a third housing provided with an opening, said first housing and said An elastic diaphragm is fixed to the joint of the third casing, and the elastic diaphragm is connected to the first casing through an elastic member toward one side of the measuring interface, and the other side of the elastic diaphragm is connectable from the first A conductive sheet extending from the opening of the three housings.
A method for recycling wastewater in a domestic wastewater reuse system according to any one of claims 1-8, characterized in that, after the drain pump is turned on, the air in the drain pump is discharged, and the second water channel and the water spray pipe are turned on. Spray water to the drain pump through the sprinkler pipe.
The method for recycling wastewater according to claim 9, wherein the water level in the water tank is detected, and when the water level drops until the drainage pump fails to fully immerse below the water surface, the second water path and the water spray line are turned on, and the drain pump is turned on. Spray water.
The method for recycling wastewater according to claim 10, wherein when it is detected that the water level in the water tank drops until the drainage pump fails to fully immerse below the water surface, the timing is started, and the second water circuit is turned on after the drainage pump works for a set time. With the water spray pipe, spray water to the drain pump.