CN205717924U - Water heater - Google Patents

Abstract

This utility model relates to water heater.Water heater includes: defecator, and it has filter element, inlet opening, clear water portals and sewage portals；The dirt that converges is managed, and is configured to receive the water portalled from blow-off pipe and sewage；And stream controls device, it is configured to controllably turn on exporting and the import of the dirty pipe of remittance of blow-off pipe, or conducting sewage portals and the import of remittance dirt pipe.Blow-off pipe outlet with converge the import conducting of dirty pipe time, defecator makes the water from inlet opening portal outflow from clear water via after filter element filtering.Sewage portal with converge the import conducting of dirty pipe time, defecator portals outflow from sewage after making to be carried out filter element from the water of inlet opening.This water heater need not dismantle the filter element in defecator, cleans simple and convenient, solves artificial unloading and cleans filter element and blowdown difficult problem, shortens water heater cleaning cycle, saves maintenance cost, improves water heater water quality and serviceability.

Description

Water heater

Technical field

This utility model relates to water technical field of heating, particularly relates to a kind of water heater.

Background technology

At present, in order to ensure in water heater water quality in water quality, especially Teat pump boiler, need at water heater Cooling water inlet at defecator is installed, and get rid of in time the dirt in water tank.General user is at water heater Blowdown or when cleaning filter screen, needs professional to visit dismounting or opened filter or sewage draining exit are cleared up, And some water heater installation site causes clean and maintenance constant, causes difficult in maintenance, therefore most users heat The hydrophone cleaning cycle is the longest, thus reduces user and use water quality.

Utility model content

The purpose of this utility model is intended to overcome at least one defect of existing water heater, it is provided that a kind of novelty Water heater, it realizing the cleaning to filter screen in the case of not removing filter screen and can get rid of water tank in time In dirt, and simple in construction, easy to control.

Specifically, this utility model provides a kind of water heater, including water tank, water inlet pipe and blow-off pipe, institute Stating water inlet pipe to be configured in described water tank carry water, described blow-off pipe connects with the bottom of described water tank.Special Not, described water heater also includes:

Defecator, it has filter element, inlet opening, clear water portals and sewage portals, and is configured to controllably make Water from described inlet opening portals outflow from described clear water via after described filter element filtering, or makes from described The water of inlet opening portals outflow from described sewage after being carried out described filter element；Described clear water portals with described The inlet communication of water inlet pipe；

The dirt that converges is managed, and is configured to receive the water portalled from described blow-off pipe and described sewage；And

Stream controls device, is configured to controllably turn on the outlet of described blow-off pipe and entering of the described dirty pipe of remittance Mouthful, or turn on described sewage and portal and the described import converging dirty pipe；And

When the outlet of described blow-off pipe turns on the described import converging dirty pipe, described defecator makes from institute State the water of inlet opening to portal outflow from described clear water via after described filter element filtering；

When described sewage portals with the described import conducting converging dirty pipe, described defecator make from described enter The water in water hole portals outflow from described sewage after being carried out described filter element.

Alternatively, described defecator also includes:

Housing, defines the filter chamber extended along its length in it, and described housing has described in connection Described inlet opening in the middle part of filter chamber, and lay respectively at described filter chamber two ends two portal, described two The individual the most described clear water that portals portal and described sewage portal, and each described in portal with described filter chamber with Axle is arranged；Described filter element is arranged in described filter chamber movingly along the length direction of described housing；With

Two sliding plugs, each described sliding plug is configured through moving out along the length direction of described housing Opening and portal described in one, inward blocks this and portals；And

Each described sliding plug is fixed on the side of described filter element, so that this sliding plug is in the interior side pressure because being subject to Pressure reduction is there is and/or by from described inlet opening in power more than outside pressure, the outer end of two described sliding plugs The impact of water and moving out open this when portalling, not only drive described filter element to being opened by this sliding plug or stifled Portal described in Sai motion make described filter element move to described inlet opening and between this portals, so that from The water of described inlet opening flows out this via described filter element and portals, and drives another sliding plug to block another to go out Hole.

Alternatively, in each described sliding plug is arranged at movingly described in one and portals；And

Offer multiple length direction along described housing on the inner perisporium of each described sliding plug to extend The first guiding gutter；

Offer on the outer end inner wall portalled described in each that multiple length direction along described housing extends the Two guiding gutters.

Alternatively, each described sliding plug is arranged at the outer end portalled described in movingly, and its diameter is big In this interior diameter portalled, and it is connected by connecting rod and described filter element are fixing.

Alternatively, described stream controls device is electric T-shaped valve.

Alternatively, described stream control device be configured to controllably to simultaneously turn off the outlet of described blow-off pipe with The described import converging dirty pipe, and turn off described sewage and portal and the described import converging dirty pipe, with in described heat When the outlet pipe of hydrophone is in the conduction state, described defecator makes the water from described inlet opening via described Portal outflow from described clear water after filter element filtering.

Alternatively, described water heater also includes intervalometer, described water heater to be configured to according to described intervalometer sending out The timing signal timing gone out makes described stream control device to turn on described sewage and portal and described the entering of dirty pipe of converging Mouthful.

Alternatively, described water heater also includes flow detector, is configured to detect the water outlet of described water heater The water flow of pipe；And

Described water heater is configured to when described water flow is less than preset value make described stream control device and leads to Described sewage portals and the described import converging dirty pipe.

Alternatively, described water heater also includes triggering device, is configured to receive external operation clear to generate filter element Wash and water tank blowdown signal；And

Described water heater is configured to, when getting described filter element cleaning and water tank blowdown signal, first make described stream Road controls device and turns on described sewage and portal and the described import converging dirty pipe, after Preset Time, makes described stream Control the import that device turns on the outlet pipe dirty with described remittance of described blow-off pipe.

Water heater of the present utility model is because using special defecator and stream to control device, clear at needs During filter wash net, the sewage of conducting defecator portals and converges dirt and manages, the dirt in needing eliminating water tank Time, conducting blow-off pipe is managed with remittance dirt.Need not dismantle the filter element in defecator, clean simple and convenient, Solve artificial unloading and clean filter element and blowdown difficult problem, shorten water heater cleaning cycle, save and safeguard into This, improve water heater water quality and serviceability.

Further, because defecator has filter element, two sliding plugs and two in water heater of the present utility model Individual portal.Two portal and can be respectively clear water and portal and sewage portals, to be respectively used to discharge clear water and sewage. When needs clear water, making clear water portal with water-storing tank etc. and connect, the sliding plug that blocking clear water portals can be because being subject to To inside pressure there is pressure reduction and/or by from inlet opening more than outside pressure, the outer end of two sliding plugs The impact of water move out, drive filter element to be portalled motion to by clear water, finally make the water warp from inlet opening Flowed out clear water by filter element to portal, to realize the filtration of water.When needs clean filter element, sewage is made to portal and row The connections such as dirty groove, the sliding plug that blocking sewage portals can because of the inside pressure that is subject to more than outside pressure, two There is pressure reduction and/or moved out by the impact of water from inlet opening in the outer end of sliding plug, drive filter element to Portalled motion by sewage, finally make to flow out sewage from the water of inlet opening via filter element and portal, to realize filter element By automatic backwash, improve the service life of defecator.This filter apparatus configuration is simple, easy to control, Water heater can be made only to need to open corresponding valve, and filter element will be automatically moved to relevant position, to realize water Filter or the backwash of filter element self.

According to below in conjunction with the accompanying drawing detailed description to this utility model specific embodiment, those skilled in the art Will become more apparent from of the present utility model above-mentioned and other purposes, advantage and feature.

Accompanying drawing explanation

Describe in detail more of the present utility model the most by way of example, and not by way of limitation Specific embodiment.Reference identical in accompanying drawing denotes same or similar parts or part.This area It is to be understood by the skilled artisans that what these accompanying drawings were not necessarily drawn to scale.In accompanying drawing:

Fig. 1 is the schematic diagram of the water heater according to one embodiment of this utility model；

Fig. 2 is the schematic diagram of defecator in the water heater according to one embodiment of this utility model；

Fig. 3 is the schematic cross sectional views of defecator shown in Fig. 2；

Fig. 4 is the schematic explosive view of defecator shown in Fig. 2.

Detailed description of the invention

Fig. 1 is the schematic diagram of the water heater according to one embodiment of this utility model.As it is shown in figure 1, This utility model embodiment provides a kind of water heater, including water tank 100, water inlet pipe 200, heater 300, outlet pipe and blow-off pipe 400.Water inlet pipe 200 is configured in water tank 100 carry water, heater 300 water in heating water tank 100, outlet pipe is for discharging the high-temperature water in water tank 100, blow-off pipe 400 connect with the bottom of water tank 100.Further, this water heater is preferably Teat pump boiler, adds hot charging Putting 300 can be heat pump heating module, and it can include compressor, for adding the condenser of hot water, throttling arrangement And vaporizer.

Especially, the water heater of this utility model embodiment also includes defecator 500, dirty pipe 600 and that converges Stream controls device 700.

Defecator 500 has filter element 30, inlet opening 23, clear water portals and sewage portals, and is configured to be subject to Control ground makes the water from inlet opening 23 portal outflow from clear water via after filter element 30 filtration, or makes from water inlet The water in hole 23 portals outflow from sewage after being carried out filter element 30.Clear water portals can be with water inlet pipe 200 Inlet communication.

The dirty pipe 600 that converges is configured to receive the water portalled from blow-off pipe 400 and sewage.

Stream controls device 700 and is configured to controllably turn on the outlet of blow-off pipe 400 and entering of the dirty pipe 600 of remittance Mouthful, or conducting sewage portals and the import of the dirty pipe 600 of remittance.

When the import of the outlet pipe 600 dirty with remittance at blow-off pipe 400 turns on, defecator 500 makes from entering The water in water hole 23 portals outflow from clear water after filtering via filter element 30.Portal at sewage and converge dirty pipe 600 Import conducting time, defecator 500 make from the water of inlet opening 23, filter element 30 to be carried out after from sewage Portal outflow.

Further, in this embodiment, stream control device 700 is configured to the controllably row of simultaneously turning off Exporting and the import of the dirty pipe 600 of remittance of dirt pipe 400, and shutoff sewage portals and the import of remittance dirt pipe 600, With when the outlet pipe of water heater is in the conduction state, defecator 500 makes the water warp from inlet opening 23 Portal outflow from clear water after being filtered by filter element 30.

In this embodiment, when needs water filling in water tank 100, stream controls device 700 and simultaneously turns off The outlet of blow-off pipe 400 with converge the import of dirty pipe 600, and turn off sewage and portal and converge the entering of dirt pipe 600 Mouthful, defecator 500 portals outflow from clear water after making to filter from the water of inlet opening 23 via filter element 30, To provide the clear water through filtering in water tank 100.When user is during with water, going out of hot water device Water pipe is in the conduction state, then the water in water tank 100 reduces, and needs water filling, defecator 500 to make Water from inlet opening 23 portals outflows from clear water after filtering via filter element 30, with offer warp in water tank 100 The clear water filtered.

When user needs to clean filter element 30, stream control device 700 can turn on sewage and portals and converge dirt pipe The import of 600 so that defecator 500 make from the water of inlet opening 23, filter element 30 to be carried out after from Sewage portals outflow, and flow to other position via converging dirty pipe 600, does not dismantle filter element 30 and is achieved that Cleaning to filter element 30.When needing to get rid of the dirt in water tank 100, stream controls device 700 can lead The import of the outlet of logical blow-off pipe 400 pipe 600 dirty with remittance, defecator 500 makes from inlet opening 23 Water portals outflow from clear water, to wash away bottom water tank 100 after filtering via filter element 30.

In embodiments more of the present utility model, defecator 500 can be automatic backwashing type filtering equipment. Fig. 2 to Fig. 4 be respectively the defecator 500 according to one embodiment of this utility model schematic diagram, Schematic cross sectional views and schematic explosive view.As shown in Figures 2 to 4, this defecator 500 may also include Housing 20 and two sliding plugs 40.

Specifically, in housing 20, define the filter chamber extended along its length, and housing 20 has even By the described inlet opening 23 in the middle part of filter chamber, and lay respectively at filter chamber two ends two portal 24, often Individual portalling 24 is coaxially disposed with filter chamber.Such as, housing 20 can include the first housing section 21 and the second shell Body 22, the first housing section 21 there is inlet opening 23 and one portal 24.Have in second housing section 22 Another portals 24, and is removably installed in the first housing section 21, to limit filter chamber.Further, First housing section 21 and the second housing section 22 can be by the mode sealed connections such as screw thread pair or alternate manner.Two Individual portal 24 can be respectively clear water portal and sewage portal.

Filter element 30 is arranged in filter chamber movingly along the length direction of housing 20.Preferably, filter element 30 Plate-shaped, it is perpendicular to the length direction of housing 20.Such as, filter element 30 can include dismountable one layer or many Layer drainage screen.

Each sliding plug 40 is configured through moving out along the length direction of housing 20 to be opened one and portals 24, inward blocks this and portals 24.And, each sliding plug 40 is fixed on the side of filter element 30, with This sliding plug 40 is made to exist more than outside pressure, the outer end of two sliding plugs 40 in the inside pressure because being subject to Pressure reduction and/or by from the impact and moving out of the water of inlet opening 23 open this portal 24 time, not only carry Dynamic filter element 30 is to 24 motions make filter element 30 move to into water of portalling opened by this sliding plug 40 or block Hole 23 and this portal between 24 so that flowing out this from the water of inlet opening 23 via filter element 30 to portal 24, And drive another sliding plug 40 to block another and portal 24.Such as, two sliding plugs 40 can be respectively first Sliding plug and the second sliding plug.First sliding plug is used for opening or block clear water and portals, and the second sliding plug is used for Open or block sewage to portal.Two sliding plugs 40 can be connected with filter element 30 by screw thread or snap.

Inlet opening 23 and each portal 24 periphery wall on be provided with pipe screw thread, in order to pipeline install.

In this embodiment, when on outlet pipe valve open or stream control device 700 turn on blow-off pipe When the import of the outlet of 400 pipe 600 dirty with remittance needs water in making water tank 100, i.e. in water tank 100, hydraulic pressure is dashed forward So step-down, if the position of between filter element 30 is in inlet opening 23 and clear water portals and distance inlet opening 23 is Far, then the first sliding plug is in the state that clear water portals of opening, and the second sliding plug is in what blocking sewage portalled State.After can being filtered via filter element 30 from the tap water of inlet pipe, portal outflow from clear water, it is achieved water Be filtrated to get clear water.Between if filter element 30 is in inlet opening 23 and sewage portals and distance inlet opening 23 Position farthest, then the first sliding plug can be at blocking the state that clear water portals, and the second sliding plug can be at beating Open the state that sewage portals, then the pressure of the first sliding plug outer end is because the pressure in water tank 100 diminishes suddenly, Can make to there is pressure reduction between the outer end of two sliding plugs, the tap water being simultaneously from inlet opening 23 also can be right The inner side of the first sliding plug is impacted, and makes the first sliding plug be displaced outwardly opening clear water and portals, then filter element 30 and second sliding plug moved simultaneously.Due to the first sliding plug in the inside pressure because being subject to more than outer side pressure There is pressure reduction in power, the outer end of two sliding plugs 40 and/or the impact by the water from inlet opening 23 can oneself Dynamic motion is portalled fully opening clear water, then filter element 30 can be automatically moved to inlet opening 23 and clear water portals it Between, so that filter element 30 is capable of the filtration to tap water, and make the second sliding plug blocking sewage portal. Between filter element 30 is in inlet opening 23 and clear water portals and distance inlet opening 23 highest distance position be in Between inlet opening 23 and sewage portal and distance inlet opening 23 highest distance position between any position time, by Exist more than outside pressure, the outer end of two sliding plugs 40 in the inside pressure because being subject in the first sliding plug Pressure reduction and/or portalled by can automatically move to fully open clear water from the impact of water of inlet opening 23, And drive filter element 30 to move to inlet opening 23 and clear water portal between and the highest distance position of distance inlet opening 23, The second sliding plug blocking sewage is driven to portal.It is to say, when user needs with water or because getting rid of water tank 100 When interior dirt is with needs clear water, opens the valve on outlet pipe or make stream control device 700 turn on blowdown The import of the outlet of pipe 400 pipe 600 dirty with remittance, to rely on the first sliding plug in the interior side pressure because being subject to Pressure reduction is there is and/or by the water from inlet opening 23 in power more than outside pressure, the outer end of two sliding plugs 40 The characteristic that can automatically move of impact, make clear water portal and be in open mode, make filter element 30 press close to clear water Portal and can filter tap water, make sewage portal (also referred to as sewage portals) be closed.

Based on above-mentioned same principle, when filter element 30 is carried out by needs, stream is made to control device 700 Conducting sewage portals and the import of the dirty pipe 600 of remittance, makes filter element 30 between portalling in inlet opening 23 and sewage And distance inlet opening 23 far from, then the tap water from inlet pipe can carry out backwash to filter element 30, To realize the cleaning of filter element 30.It is to say, when needs clean filter element 30, make stream control device 700 Conducting sewage portals and the import of the dirty pipe 600 of remittance, to rely on the second sliding plug in the interior side pressure because being subject to Pressure reduction is there is and/or by the water from inlet opening 23 in power more than outside pressure, the outer end of two sliding plugs 40 The characteristic that can automatically move of impact, make sewage portal and be in open mode, make filter element 30 press close to sewage Portal and clear water can be made to portal be closed by tap water backwash.So there is no need to pull down filter element 30, it is achieved the automatically cleaning of filter element 30, simple and reliable for structure, install simple, easy to use, control stream Control device 700 can complete filter element 30 without dismounting filter element 30 and clean, and it is excellent that stream controls device 700 It is first three-way valve, particularly electric T-shaped valve, can realize remotely controlling, a key operation etc..Stream controls dress Put 700 and may also comprise two electrically operated valves, be respectively arranged on blow-off pipe 400 and sewage portals and converges dirt pipe On pipeline between 600.

In embodiments more of the present utility model, two sliding plugs 40 and filter element 30 are also arranged such that: When filter element 30 is moved to opposite side by the side along the length direction of housing 20 of inlet opening 23, it is positioned at What sliding plug 40 blocking of the side of inlet opening 23 was positioned at the side of inlet opening 23 portals 24.It is to say, Filter chamber, two sliding plugs 40 and filter element 30 are designed to corresponding size, when filter element 30 is positioned at into water During the side in hole 23, the opposite side sliding plug 40 being positioned at inlet opening 23 is constantly in blocking inlet opening 23 Opposite side portal 24；When filter element 30 is positioned at the opposite side of inlet opening 23, it is positioned at the one of inlet opening 23 What the sliding plug 40 of side was constantly in the side of blocking inlet opening 23 portals 24.Preferably, when filter element 30 It is positioned at the side of inlet opening 23, and when the distance of this inlet opening 23 is farthest, this side of inlet opening 23 Sliding plug 40 open this side portal 24.In alternate embodiment more of the present utility model, work as filter Core 30 is positioned at the side of inlet opening 23 and when the distance of this inlet opening 23 is farthest, inlet opening 23 another What the sliding plug 40 of side blocked opposite side portals 24.

In embodiments more of the present utility model, for conservative control filter element 30 and two sliding plugs 40 Stroke, filter chamber includes being in first section at middle part and being positioned at two the secondth districts of the first section both sides Section, the diameter of each second section is less than the diameter of the first section.And for the ease of the motion of filter element 30, The diameter of the filter element 30 projection in the plane of length direction being perpendicular to housing 20 is straight less than the first section Footpath, and more than the diameter of the second section.

In embodiments more of the present utility model, each sliding plug 40 in column, and can set movingly It is placed in one and portals in 24；And offer multiple along housing 20 on the inner perisporium of each sliding plug 40 Length direction extend the first guiding gutter 41；Each portal 24 outer end inner wall on offer multiple along shell The second guiding gutter 25 that the length direction of body 20 extends.When sliding plug 40 is opened and is portalled 24 accordingly, the One guiding gutter 41 and the second guiding gutter 25 can be easy to the flowing of water.It should be noted that in this embodiment into Be easy to the movement of sliding plug 40, the diameter of sliding plug 40 coarse position can be slightly less than portal 24 interior directly Footpath, sliding plug 40 blocking portal 24 time, sliding plug 40 and portal and may there is minim gap between 24, Gap has water form sealing effectiveness, this kind of situation also need to be interpreted as sliding plug 40 blocking portal 24 situation. In alternate embodiment more of the present utility model, each sliding plug 40 is arranged at one movingly and goes out The outer end in hole 24, its diameter is more than this interior diameter portalled, and is connected by connecting rod is fixing with filter element 30. Such as, each sliding plug 40 can be cover plate or plug, be arranged at one portal 24 outer end.

In embodiments more of the present utility model, water heater may also include intervalometer, and water heater is configured to root The timing signal timing sent according to intervalometer makes stream control device 700 to turn on sewage and portal and converge dirty pipe 600 Import.Further, after Preset Time, make stream control device 700 and turn on going out of blow-off pipe 400 The import of mouth pipe 600 dirty with remittance, with the dirt in discharge water tank 100 timely after cleaning filter element 30.? In other embodiments of the present utility model, water heater also includes flow detector, is configured to detection heat The water flow of the outlet pipe of hydrophone；And water heater is configured to when water flow is less than preset value make stream control Device 700 processed turns on sewage and portals and the import of the dirty pipe 600 of remittance.In other embodiment of the present utility model In, water heater also includes triggering device, is configured to receive external operation and washes with generation filtering and water tank blowdown letter Number.Water heater is configured to wash and during water tank blowdown signal getting filtering, first makes stream control device 700 Conducting sewage portals and the import of the dirty pipe 600 of remittance, after Preset Time, makes stream control device 700 conducting and arranges The import of the outlet of dirty pipe 400 pipe 600 dirty with remittance.Triggering device can be mechanical key or touch key-press, with The operation receiving user carries out filter element 30 cleaning and water tank 100 blowdown.

This utility model embodiment additionally provides the control of a kind of water heater in any of the above-described embodiment Method, this control method includes:

Obtain filtering to wash and water tank blowdown signal.Filtering wash and water tank blowdown signal can be user's subjectivity by by Key makes water heater generate, or water heater automatically generates according to timer, it is possible to be water heater is according to water outlet The water flow of pipe automatically generates.

Make stream control device 700 turn on sewage to portal and the import of the dirty pipe 600 of remittance, so that defecator 500 Portal outflow from sewage after making from the water of inlet opening 23, filter element 30 to be carried out, thus realize filter element The cleaning of 30.

After Preset Time, make stream control device 700 and turn on outlet and the remittance dirt pipe 600 of blow-off pipe 400 Import, so that defecator 500 portals from clear water after making to filter from the water of inlet opening 23 via filter element 30 Flow out, thus realize discharging the dirt in water tank 100.

So far, although those skilled in the art will appreciate that the most detailed to illustrate and describe this practicality new Multiple exemplary embodiments of type, but, in the case of without departing from this utility model spirit and scope, still Can directly determine according to this utility model disclosure or derive the many meeting this utility model principle Other variations or modifications.Therefore, scope of the present utility model is it is understood that and regard as covering all these Other variations or modifications.

Claims (9)

1. a water heater, including water tank, water inlet pipe and blow-off pipe, described water inlet pipe is configured to described water Conveying water in case, described blow-off pipe connects with the bottom of described water tank；It is characterized in that, described water heater is also Including:

Defecator, it has filter element, inlet opening, clear water portals and sewage portals, and is configured to controllably make Water from described inlet opening portals outflow from described clear water via after described filter element filtering, or makes from described The water of inlet opening portals outflow from described sewage after being carried out described filter element；Described clear water portals with described The inlet communication of water inlet pipe；

The dirt that converges is managed, and is configured to receive the water portalled from described blow-off pipe and described sewage；And

Stream controls device, is configured to controllably turn on the outlet of described blow-off pipe and entering of the described dirty pipe of remittance Mouthful, or turn on described sewage and portal and the described import converging dirty pipe；And

When the outlet of described blow-off pipe turns on the described import converging dirty pipe, described defecator makes from institute State the water of inlet opening to portal outflow from described clear water via after described filter element filtering；

When described sewage portals with the described import conducting converging dirty pipe, described defecator make from described enter The water in water hole portals outflow from described sewage after being carried out described filter element.

Water heater the most according to claim 1, it is characterised in that described defecator also includes:

Housing, defines the filter chamber extended along its length in it, and described housing has described in connection Described inlet opening in the middle part of filter chamber, and lay respectively at described filter chamber two ends two portal, described two The individual the most described clear water that portals portal and described sewage portal, and each described in portal with described filter chamber with Axle is arranged；Described filter element is arranged in described filter chamber movingly along the length direction of described housing；With

Two sliding plugs, each described sliding plug is configured through moving out along the length direction of described housing Opening and portal described in one, inward blocks this and portals；And

Each described sliding plug is fixed on the side of described filter element, so that this sliding plug is in the interior side pressure because being subject to Pressure reduction is there is and/or by from described inlet opening in power more than outside pressure, the outer end of two described sliding plugs The impact of water and moving out open this when portalling, not only drive described filter element to being opened by this sliding plug or stifled Portal described in Sai motion make described filter element move to described inlet opening and between this portals, so that from The water of described inlet opening flows out this via described filter element and portals, and drives another sliding plug to block another to go out Hole.

Water heater the most according to claim 2, it is characterised in that

Each described sliding plug is arranged at described in one in portalling movingly；And

Offer multiple length direction along described housing on the inner perisporium of each described sliding plug to extend The first guiding gutter；

Offer on the outer end inner wall portalled described in each that multiple length direction along described housing extends the Two guiding gutters.

Water heater the most according to claim 2, it is characterised in that

Each described sliding plug is arranged at the outer end portalled described in movingly, and its diameter portals more than this Interior diameter, and fixed by connecting rod and described filter element and be connected.

Water heater the most according to claim 1, it is characterised in that

It is electric T-shaped valve that described stream controls device.

Water heater the most according to claim 1, it is characterised in that

Described stream controls device and is configured to controllably simultaneously turn off the outlet of described blow-off pipe and described remittance The import of dirty pipe, and turn off described sewage and portal and the described import converging dirty pipe, with at described water heater When outlet pipe is in the conduction state, described defecator makes the water from described inlet opening via described filter element mistake Portal outflow from described clear water after filter.

Water heater the most according to claim 1, it is characterised in that also include:

Intervalometer, the timing signal timing that described water heater is configured to according to described intervalometer sends makes described stream Road controls device and turns on described sewage and portal and the described import converging dirty pipe.

Water heater the most according to claim 1, it is characterised in that also include:

Flow detector, is configured to detect the water flow of the outlet pipe of described water heater；And

Described water heater is configured to when described water flow is less than preset value make described stream control device and leads to Described sewage portals and the described import converging dirty pipe.

Water heater the most according to claim 1, it is characterised in that also include:

Trigger device, be configured to receive external operation to generate filter element cleaning and water tank blowdown signal；And

Described water heater is configured to, when getting described filter element cleaning and water tank blowdown signal, first make described stream Road controls device and turns on described sewage and portal and the described import converging dirty pipe, after Preset Time, makes described stream Control the import that device turns on the outlet pipe dirty with described remittance of described blow-off pipe.