CN112479278A - System for solving frequent stop and start operations of water purifying electric appliance and operating method thereof - Google Patents
System for solving frequent stop and start operations of water purifying electric appliance and operating method thereof Download PDFInfo
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- CN112479278A CN112479278A CN202011276051.9A CN202011276051A CN112479278A CN 112479278 A CN112479278 A CN 112479278A CN 202011276051 A CN202011276051 A CN 202011276051A CN 112479278 A CN112479278 A CN 112479278A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 397
- 238000011017 operating method Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000000903 blocking effect Effects 0.000 claims description 47
- 238000013519 translation Methods 0.000 claims description 32
- 239000008213 purified water Substances 0.000 claims description 28
- 230000007704 transition Effects 0.000 claims description 17
- 230000000670 limiting effect Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000000746 purification Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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Abstract
The invention relates to the technical field of pipeline machines, in particular to a system for solving the problem of frequent stop and start operations of a water purifying electric appliance and a working method thereof. The utility model provides a solve water purification electrical apparatus frequently and stop system of starting work, including water purifier, pipeline machine, pure water tap, three way connection and four way connection, three way connection's first interface and outside water source are connected, three way connection's second interface and four way connection's first interface pass through main water path connection, the water purifier sets up on main water path, four way connection's second interface is connected with pure water tap through first water path, four way connection's third interface passes through the second water path and is connected with pipeline machine, still include the return water device. The invention can solve the problem of frequent stop and start of the water purifying electric appliance under the condition of not wasting water resources, thereby reducing the water leakage rate of the water purifying electric appliance.
Description
Technical Field
The invention relates to the technical field of pipeline machines, in particular to a system for solving the problem of frequent stop and start operations of a water purifying electric appliance and a working method thereof.
Background
When various water purifiers are connected in series with a pipeline machine for use at present, the frequent stop and start of the water purifiers and the situations of high water leakage rate, short service life, easy burning loss of electric appliance parts and high failure rate caused by the frequent stop and start of the water purifiers can occur. The reasons for this are: the water purifier water yield is big, the velocity of flow is fast, and the pipeline machine is in order to ensure that the leaving water temperature is up to standard, and water yield and leaving water velocity of flow all design invariant and less, and the flow receives the restriction after the water that the water purifier purified gets into the pipeline machine, leads to the pressure to rise in the series connection water route, and high pressure switch starts to close the water purifier in the water purifier after the water pressure of series connection water route rises, and along with the pipeline machine end of getting water continues to get water, series connection water route pressure reduces the water purifier restart.
So far, this series of current situation circulation takes place, leads to water purification electrical apparatus frequently to stop to start the work, leads to water purification electrical apparatus to appear often that the water leakage rate is high, the life-span reduces, the easy scaling loss of electrical components, the condition that the fault rate is high.
Disclosure of Invention
The invention mainly aims at the problems that the water purifying electric appliance frequently stops and starts working when the existing water purifying electric appliance and a pipeline machine are connected in series for use, so that the water purifying electric appliance frequently has high water leakage rate, short service life, easy burning loss of electric appliance parts and high failure rate, and provides a system for solving the problem of frequent stopping and starting working of the water purifying electric appliance and a working method thereof.
The purpose of the invention is mainly realized by the following scheme: a system for solving the problem of frequent stop and start of a water purifying electric appliance comprises a water purifier, a pipeline machine, a pure water faucet, a three-way joint and a four-way joint, wherein a first interface of the three-way joint is connected with an external water source, a second interface of the three-way joint is connected with a first interface of the four-way joint through a main water path, the water purifier is arranged on the main water path, a second interface of the four-way joint is connected with the pure water faucet through a first water path, a third interface of the four-way joint is connected with the pipeline machine through a second water path, the system further comprises a water return device, the water return device comprises a third water path and a fourth water path, two ends of the third water path and the fourth water path are connected, an adjusting valve is arranged on the third water path, an electric control valve group consisting of a plurality of electromagnetic valves is arranged on the fourth water path, one end of the third water path and the fourth, and the other end of the third water path connected with the fourth water path is connected with a fourth interface of the four-way joint. The water purifier is arranged on the main water path, the second interface of the four-way joint is connected with a pure water tap through a first water path, the third interface of the four-way joint is connected with a pipeline machine through a second water path, the water purifier also comprises a water return device, the water return device comprises a third water path and a fourth water path, the third water path and the fourth water path are connected at two ends, namely the third water path and the fourth water path are arranged in parallel, a regulating valve is arranged on the third water path, an electric control valve group consisting of a plurality of electromagnetic valves is arranged on the fourth water path, a water path consisting of one end of the third water path and one end of the fourth water path which are connected is connected with the third interface of the three-way joint, and a water path consisting of the other end of the third water path and the other end of the fourth water path which are connected is connected with the fourth interface of the four-way joint, there are two operating states, state one: in the water taking state of the pure water faucet, an external water source enters the water purifier from the three-way joint through the main waterway water pipe to prepare purified water, and the purified water flows out after reaching the pure water faucet from the main waterway water pipe to the four-way joint through the first waterway; and a second state: when the pipeline machine is in a water taking state, an external water source enters the water purifier from the three-way joint through the main waterway water pipe to prepare purified water, and the purified water flows out after reaching the pipeline machine from the main waterway water pipe to the four-way joint through the second waterway; when the water purifier works in the two states, the water return device is opened, part of purified water enters the water return device through the four-way joint and then flows back to an external water source, so that the problem that the water purifier is frequently stopped and started under the condition of not wasting water resources is solved, the water leakage rate of the water purifier is reduced, the service life is prolonged, the failure rate is reduced, and the burning loss of electric appliance parts can be prevented.
Preferably, the four-way joint comprises a first main body, the first main body is provided with three first connecting cavities and a first main water inlet cavity connected with the water purifier, the three-way joint comprises a second main body, and the second main body is provided with two second connecting cavities and a second main water inlet cavity connected with an external water source. The four-way joint comprises a first main body, wherein a first three first connecting cavity and a first main water inlet cavity connected with the water purifier are arranged on the first main body, the three-way joint comprises a second main body, and two second connecting cavities and a second main water inlet cavity connected with an external water source are arranged on the second main body, so that the water can flow conveniently.
Preferably, the first connecting cavity and the second connecting cavity are both provided with backflow prevention devices, the first connecting cavity and the second connecting cavity respectively comprise a transition cavity and a water blocking cavity, the water blocking cavity is arranged on one side of the transition cavity along the water flow direction, the backflow prevention devices comprise mounting blocks arranged on one side of the transition cavity far away from the water blocking cavity, translation holes are formed in the mounting blocks, translation columns are connected in the translation holes in a sliding mode, one ends of the translation columns are provided with water blocking blocks matched with the water blocking cavities, limiting heads are arranged at the other ends of the translation columns, water blocking springs are arranged between the water blocking blocks and the mounting blocks around the translation columns, and water inlet holes are formed in the mounting blocks. The first connecting cavity and the second connecting cavity are both provided with backflow prevention devices, the backflow prevention devices are designed to prevent water flow from flowing backwards, the first connecting cavity and the second connecting cavity both comprise a transition cavity and a water blocking cavity, the water blocking cavity is arranged on one side of the transition cavity along the flow direction of the water flow, each backflow prevention device comprises an installation block arranged on one side of the transition cavity far away from the water blocking cavity, a translation hole is formed in the installation block, a translation column is connected in the translation hole in a sliding mode, one end of the translation column is provided with a water blocking block matched with the water blocking cavity, the other end of the translation column is provided with a limiting head, a water blocking spring is arranged between the water blocking block and the installation block and around the translation column, a water inlet hole is further formed in the installation block, the water flow flows in a water pipeline, when flowing into the three-way joint or the four-way joint, the water flow firstly flows through the water inlet hole and then enters the transition cavity, and abuts, along with hydraulic increase, rivers can overcome and drive the manger plate piece and the translation post removes behind the spring force of manger plate spring for have the clearance between the inner wall in manger plate piece and manger plate chamber, rivers can flow first connection chamber or second smoothly this moment and connect the chamber, when water pressure is less, the inner wall in manger plate piece and manger plate chamber can closely laminate under the effect of manger plate spring, thereby can prevent the water backward flow, stability is good.
Preferably, the cross section of the water blocking cavity is trapezoidal, and the cross section of the water blocking block is trapezoidal matched with the water blocking cavity. The cross section of the water blocking cavity is trapezoidal, the cross section of the water blocking block is trapezoidal matched with the water blocking cavity, and one side with smaller cross section area of the water blocking cavity is connected with the transition cavity, so that the sealing performance is better when the water blocking block is matched with the water blocking cavity, and the effect of preventing water backflow can be better played.
Preferably, a sealing gasket matched with the inner wall of the water blocking cavity is arranged on the outer surface of the water blocking block. The outer surface of the water blocking block is provided with a sealing gasket matched with the inner wall of the water blocking cavity, and the sealing gasket has elasticity, so that the sealing performance of the backflow preventing device can be greatly improved.
Preferably, the cross section of the limiting head is triangular. The cross section of the limiting head is triangular, and the side with the larger cross section area of the limiting head is connected with the translation column, so that the limiting head can play a better limiting effect, and the translation column is prevented from generating larger displacement.
Preferably, the regulating valve is a manual regulating valve. The governing valve is manual governing valve, all can open work in any circumstance, and the practicality is stronger.
Preferably, a check valve is arranged on the waterway between one end of the third waterway, which is connected with the fourth waterway, and the joint of the third waterway and the fourth waterway. One end that third water route and fourth water route link to each other and with the tee junction between the water route on be provided with the check valve to can prevent rivers refluence, improve stability.
A working method of the system for solving the problem of frequent stop and start of the water purifying electric appliance comprises the following steps:
step one, two working states are provided, wherein the state one is as follows: in the water taking state of the pure water faucet, an external water source enters the water purifier from the three-way joint through the main waterway water pipe to prepare purified water, and the purified water flows out after reaching the pure water faucet from the main waterway water pipe to the four-way joint through the first waterway;
and a second state: when the pipeline machine is in a water taking state, an external water source enters the water purifier from the three-way joint through the main waterway water pipe to prepare purified water, and the purified water flows out after reaching the pipeline machine from the main waterway water pipe to the four-way joint through the second waterway;
step two, when the two states work, open the return water device, partial purified water can get into the return water device through cross joint department, and this return water device divide into manual and automatic dual mode, manual mode: purified water flows back to an external water source through a third water path through a regulating valve, a check valve and a three-way joint; the automatic mode is as follows: the water flows back to an external water source through the electric control valve group, the check valve and the three-way joint by the fourth water path, the number of the electromagnetic valves which are correspondingly opened at different gears can be selected to be different, and the amount of the backflow water can be adjusted according to the water yield of different water purifying electric appliances, so that the use and solution of various water purifying electric appliances are met, and the stability of the whole system can be better solved.
Therefore, the system for solving the problem of frequent stop and start of the water purifying electric appliance and the working method thereof have the following advantages: the invention has reasonable design, reliable performance, safety and environmental protection, can solve the problem of frequent stop and start of the water purifying electric appliance under the condition of not wasting water resources, thereby reducing the water leakage rate of the water purifying electric appliance, prolonging the service life, reducing the failure rate, preventing the burning loss of electric appliance parts and having high stability during the integral operation.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a cross-sectional view of the four-way joint of the present invention.
FIG. 3 is a cross-sectional view of a three-way joint according to the present invention.
Illustration of the drawings: 1-a water purifier, 2-a water returning device, 3-a pure water tap, 4-a four-way joint, 5-a regulating valve, 6-an electronic control valve group, 7-a pipeline machine, 8-a check valve, 9-a three-way joint, 10-a main water channel, 11-a first water channel, 12-a second water channel, 13-a third water channel, 14-a fourth water channel, 15-a first main body, 16-a first connecting cavity, 17-a water retaining cavity, 18-a water retaining block, 19-a sealing gasket, 20-a translation hole, 21-a translation column, 22-a limiting head, 23-a water retaining spring, 24-a first main water inlet cavity, 25-a transition cavity, 26-a water inlet hole, 27-a second main body, 28-a second main water inlet cavity, 29-a second connecting cavity and 30-a mounting block.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1:
as shown in figure 1, a system for solving the problem of frequent stop and start operations of a water purifying electric appliance comprises a water purifier 1, a pipeline machine 7, a pure water faucet 3, a three-way joint 9 and a four-way joint 4, wherein a first interface of the three-way joint 9 is connected with an external water source which can be municipal tap water, a second interface of the three-way joint 9 is connected with a first interface of the four-way joint 4 through a main water channel 10, the water channel is formed by the existing water pipe, the water purifier 1 is arranged on the main water channel 10, a second interface of the four-way joint 4 is connected with the pure water faucet 3 through a first water channel 11, a third interface of the four-way joint 4 is connected with the pipeline machine 7 through a second water channel 12, the system further comprises a water return device 2, the water return device 2 comprises a third water channel 13 and a fourth water channel 14 which are connected with two ends, namely the third water channel 13 is connected with, governing valve 5 is manual control valve 5, all openable work in any circumstance, the practicality is stronger, be provided with the automatically controlled valves 6 of constituteing by a plurality of solenoid valves on the fourth water route 14, the water route that the one end that third water route 13 and fourth water route 14 link to each other is constituteed and three interface connection of three way connection 9, the water route that the other end that third water route 13 and fourth water route 14 link to each other is constituteed and four interface connection of four way connection 4, total two kinds of operating condition, the arrow indicates rivers flow direction in the figure, state one: in the water taking state of the pure water faucet 3, an external water source enters the water purifier 1 from the tee joint 9 through the water pipe of the main water path 10 to prepare purified water, and the purified water flows out after reaching the pure water faucet 3 from the water pipe of the main water path 10 to the position of the four-way joint 4 through the first water path 11; and a second state: when the pipeline machine 7 is in a water taking state, an external water source enters the water purifier 1 from the three-way joint 9 through the water pipe of the main water channel 10 to prepare purified water, and the purified water flows out after reaching the pipeline machine 7 from the water pipe of the main water channel 10 to the four-way joint 4 through the second water channel 12; when the water purifier works in the two states, the water return device 2 is opened, part of purified water enters the water return device 2 through the four-way joint 4 and then flows back to an external water source, so that the problem of frequent stop and start of the water purifier can be solved under the condition of no water resource waste, the water leakage rate of the water purifier is reduced, the service life is prolonged, the failure rate is reduced, and the burning loss of electric appliance parts can be prevented.
As shown in fig. 2 and 3, the four-way joint 4 includes a first main body 15, three first connection cavities 16 and a first main water inlet cavity 24 connected with the water purifier 1 are provided on the first main body 15, that is, four interfaces on the four-way joint 4 are three first connection cavities 16 and one first main water inlet cavity 24, respectively, the three-way joint 9 includes a second main body 27, two second connection cavities 29 and a second main water inlet cavity 28 connected with an external water source are provided on the second main body 27, that is, three interfaces on the three-way joint 9 are two second connection cavities 29 and one second main water inlet cavity 28, respectively, so as to facilitate the flow of water.
The first connecting cavity 16 and the second connecting cavity 29 are both provided with backflow prevention devices, the backflow prevention devices are designed to prevent water from flowing backwards, the first connecting cavity 16 and the second connecting cavity 29 both comprise a transition cavity 25 and a water retaining cavity 17, the water retaining cavity 17 is arranged on one side of the transition cavity 25 along the flowing direction of water, the backflow prevention devices comprise an installation block 30 arranged on one side of the transition cavity 25 far away from the water retaining cavity 17, a translation hole 20 is arranged on the installation block 30, a translation column 21 is connected in the translation hole 20 in a sliding manner, one end of the translation column 21 is provided with a water retaining block 18 matched with the water retaining cavity 17, the other end of the translation column 21 is provided with a limiting head 22, a water retaining spring 23 is arranged between the water retaining block 18 and the installation block and around the translation column 21, the installation block is also provided with a water inlet hole 26, water flows in a water pipeline, when flowing into the three-way joint 9 or the four-way joint 4, the rivers can flow through earlier and enter the transition chamber 25 behind the inlet opening 26 in, the rivers support on the lateral wall of manger plate 18, along with hydraulic increase, rivers can drive manger plate 18 and translation post 21 removal after overcoming the spring force of manger plate spring 23, make and have the clearance between the inner wall in manger plate 18 and manger plate chamber 17, rivers can flow first connection chamber 16 or the second connection chamber 29 of connecting this moment smoothly, when water pressure is less, manger plate 18 can closely laminate with the inner wall in manger plate chamber 17 under the effect of manger plate spring 23, thereby can prevent the water backward flow, stability is good.
The cross section of the water blocking cavity 17 is trapezoidal, the cross section of the water blocking block 18 is trapezoidal matched with the water blocking cavity 17, and one side with smaller cross section area of the water blocking cavity 17 is connected with the transition cavity 25, so that the sealing performance is better when the water blocking block 18 is matched with the water blocking cavity 17, and the effect of preventing water backflow can be better played.
The outer surface of the water blocking block 18 is provided with a sealing gasket 19 matched with the inner wall of the water blocking cavity 17, and the sealing gasket 19 has elasticity, so that the sealing performance of the backflow preventing device can be greatly improved.
The cross section of the limiting head 22 is triangular, and the side with the larger cross section area of the limiting head 22 is connected with the translation column 21, so that the limiting head 22 can achieve a better limiting effect, and the translation column 21 is prevented from generating larger displacement.
One end that third water route 13 and fourth water route 14 link to each other and with be provided with check valve 8 on the water route between the junction of three way connection 9 to can prevent rivers refluence, improve stability.
A working method of the system for solving the problem of frequent stop and start of the water purifying electric appliance comprises the following steps:
step one, two working states are provided, wherein the state one is as follows: in the water taking state of the pure water faucet 3, an external water source enters the water purifier 1 from the tee joint 9 through the water pipe of the main water path 10 to prepare purified water, and the purified water flows out after reaching the pure water faucet 3 from the water pipe of the main water path 10 to the position of the four-way joint 4 through the first water path 11;
and a second state: when the pipeline machine 7 is in a water taking state, an external water source enters the water purifier 1 from the three-way joint 9 through the water pipe of the main water channel 10 to prepare purified water, and the purified water flows out after reaching the pipeline machine 7 from the water pipe of the main water channel 10 to the four-way joint 4 through the second water channel 12;
step two, when the two states work, open return water device 2, partial purified water can get into return water device 2 through four-way connection 4 department, and this return water device 2 divide into manual and automatic two kinds of modes, manual mode: purified water flows back to an external water source through a third water path 13 through a regulating valve 5, a check valve 8 and a three-way joint 9, the mode can be started to work under any condition, and the mode is generally a supplement to an automatic mode; the automatic mode is as follows: the water flows back to an external water source through the fourth water channel 14 through the electric control valve group 6, the check valve 8 and the three-way joint 9, the number of the electromagnetic valves which are correspondingly opened at different gears can be selected to be different, the amount of the backflow water can be adjusted according to the water yield of different water purifying electric appliances, so that the use and solution of various water purifying electric appliances can be met, the stability of the whole system can be better solved, and the intelligent automatic operation can be realized under the condition that a power supply exists in the installation environment.
It should be understood that this example is only for illustrating the present invention and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (9)
1. A system for solving the problem of frequent stop and start of a water purifying electric appliance comprises a water purifier, a pipeline machine, a pure water faucet, a three-way joint and a four-way joint, and is characterized in that a first interface of the three-way joint is connected with an external water source, a second interface of the three-way joint is connected with the first interface of the four-way joint through a main water path, the water purifier is arranged on the main water path, the second interface of the four-way joint is connected with the pure water faucet through a first water path, a third interface of the four-way joint is connected with the pipeline machine through a second water path, the system also comprises a water return device, the water return device comprises a third water path and a fourth water path, two ends of the third water path and the fourth water path are connected, an adjusting valve is arranged on the third water path, an electric control valve group consisting of a plurality of electromagnetic valves is arranged on the fourth water path, one end of the third water path and the fourth, and the other end of the third water path connected with the fourth water path is connected with a fourth interface of the four-way joint.
2. The system for solving the problem of frequent stop and start operations of the water purifying electric appliance according to claim 1, wherein the four-way joint comprises a first main body, the first main body is provided with three first connecting cavities and a first main water inlet cavity connected with the water purifier, the three-way joint comprises a second main body, and the second main body is provided with two second connecting cavities and a second main water inlet cavity connected with an external water source.
3. The system for solving the problem of frequent stop and start operations of the water purifying electric appliance according to claim 2, wherein the first connecting cavity and the second connecting cavity are both provided with a backflow prevention device, the first connecting cavity and the second connecting cavity both comprise a transition cavity and a water blocking cavity, the water blocking cavity is arranged on one side of the transition cavity along the flow direction of water flow, the backflow prevention device comprises a mounting block arranged on one side of the transition cavity far away from the water blocking cavity, the mounting block is provided with a translation hole, a translation column is connected in the translation hole in a sliding manner, one end of the translation column is provided with a water blocking block matched with the water blocking cavity, the other end of the translation column is provided with a limiting head, a water blocking spring is arranged between the water blocking block and the mounting block around the translation column, and the mounting block is further provided with a water inlet hole.
4. The system for solving the problem of frequent stop and start operations of the water purifying electric appliance according to claim 3, wherein the cross section of the water blocking cavity is trapezoidal, and the cross section of the water blocking block is trapezoidal matched with the water blocking cavity.
5. The system for solving the problem of frequent stop and start operations of the water purifying electric appliance according to claim 3 or 4, wherein a sealing gasket matched with the inner wall of the water blocking cavity is arranged on the outer surface of the water blocking block.
6. The system for solving the problem of frequent stop and start operations of the water purifying electric appliance according to claim 3 or 4, wherein the cross section of the limiting head is triangular.
7. The system for solving the problem of frequent stop and start operations of a water purifying electric appliance according to claim 1, 2, 3 or 4, wherein the adjusting valve is a manual adjusting valve.
8. The system for solving the problem of frequent stop and start operations of the water purifying electric appliance according to claim 1, 2, 3 or 4, wherein a check valve is arranged on the water path between the connection part of the third water path and the connection part of the third water path and the fourth water path.
9. The working method of the system for solving the problem of frequent stop and start of the water purifying electric appliance according to any one of claims 1 to 8 is characterized by comprising the following steps:
step one, two working states are provided, wherein the state one is as follows: in the water taking state of the pure water faucet, an external water source enters the water purifier from the three-way joint through the main waterway water pipe to prepare purified water, and the purified water flows out after reaching the pure water faucet from the main waterway water pipe to the four-way joint through the first waterway;
and a second state: when the pipeline machine is in a water taking state, an external water source enters the water purifier from the three-way joint through the main waterway water pipe to prepare purified water, and the purified water flows out after reaching the pipeline machine from the main waterway water pipe to the four-way joint through the second waterway;
step two, when the two states work, open the return water device, partial purified water can get into the return water device through cross joint department, and this return water device divide into manual and automatic dual mode, manual mode: purified water flows back to an external water source through a third water path through a regulating valve, a check valve and a three-way joint; the automatic mode is as follows: the fourth water path flows back to an external water source through the electric control valve group, the check valve and the three-way joint, and the number of the electromagnetic valves which are correspondingly opened at different gears can be selected to be different.
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