CN209173496U - Automatic filtering unit - Google Patents

Abstract

It is interior to be equipped with filter screen the utility model discloses a kind of automatic filtering unit, including cartridge filter, it is equipped with rotary nozzle in filter screen, is equipped with the water inlet pipe for being provided with inlet valve on the barrel of cartridge filter；Water storage cylinder outside cartridge filter and is connected in filter screen, and automatic exhaust steam valve is housed at the top of water storage cylinder；Flushing pump, water inlet end is connected to water storage cylinder, water outlet is connected to rotary nozzle；Detection container is connected to cartridge filter；Control module is electrically connected with inlet valve and the flushing pump respectively, including the water level switch being set in detection container；Control module is drawn water out of water storage cylinder and is cleaned by rotary nozzle to filter screen in the closing of water level switch startup control inlet valve, starting flushing pump certain time.The device can be suitably used for low pressure or the filtering without water pressuring system, can make that overall structure is simple, volume-diminished, cost are reduced using rotary nozzle, and filter screen by Rapid Cleaning and then can avoid blocking, and automatic exhaust steam valve can guarantee that filtered water energy smoothly flows into water storage cylinder.

Description

Automatic filtering unit

Technical field

The utility model relates to filter technology field more particularly to a kind of automatic filtering units.

Background technique

Currently, the self-cleaning filter being widely used is a kind of impurity directly intercepted in liquid using strainer, floating material, Particulate matter etc..It realizes automatic cleaning blowdown in the way of detection inlet and outlet pressure difference or timer fixed time cleaning, overcomes The pollutant holding capability of traditional filtering product is small, disassembly, cleaning is needed vulnerable to dirt blocking, filtration fraction and can not monitor filter state etc. Numerous disadvantages, filtering accuracy is up to 10-3000 microns；Operating pressure is up to 1.0-1.6Mpa；Be mainly used for industry, agricultural, The filtering of all trades and professions water such as municipal electric power, electronics, medicine, food, printing and dyeing, building, steel, metallurgy, papermaking.

However, realizing that the filter of cleaning control is only applicable in the higher pipeline system of pressure using detection inlet and outlet pressure difference System, it is impossible to be used in the low pressure as aquarium filtering or non pressure pipe road system.The pollutant of fish jar is mainly fish excrement and eats surplus Feed.

Currently, the filter device of fish jar mainly has included upper filter filtering and external filter to filter two kinds of forms. Two kinds of filters are all to decompose part fish excrement using the filter pulp block contaminants with gap, and using nitrifier, due to can not and When and it is fully erased, can certain pollution be caused to water quality after putrid and deteriorated.

Upper filter is that the pollutant of fish excrement is filtered using the filter cotton of gross porosity, and filter effect is poor, water quality is easy By the contaminants after corruption, it is therefore desirable to the often water of replacement fish jar, moreover, because the small volume of filter cotton, gap It is limited, it needs continually to clean or replace filter pulp.

The built-in gross porosity filter cotton of external filter, thin filter cotton and other filter materials, filter effect are preferable.It is thick due to increasing The volume of filter cotton extends the Clean after every of filter pulp；By the decomposition of nitrifier, exchange water cycle can be extended.But Blockage problem caused by the impurity such as fish excrement is not can avoid.It needs to consume a large amount of water after filter cotton blocking to be rinsed, it is thin to filter The cleaning difficulty of cotton is bigger, and flushing needs replacing afterwards several times.

Utility model content

The utility model provides a kind of automatic filtering unit to solve above-mentioned technical problem, the device can be suitably used for low pressure or Filtering without water pressuring system, can make that overall structure is simple, volume-diminished, cost are reduced using rotary nozzle, using filter screen energy It by Rapid Cleaning and then avoids blocking, automatic exhaust steam valve is arranged in water storage cylinder can guarantee that the filtered water energy of cartridge filter smoothly flows Enter in water storage cylinder.

In order to solve the above technical problems, the utility model provides a kind of automatic filtering unit, comprising: cartridge filter, the mistake Be provided with filter screen in filter cylinder, rotary nozzle be provided in the filter screen, be equipped on the barrel of the cartridge filter have into The water inlet pipe of water valve；Water storage cylinder, the water storage cylinder are set to outside the cartridge filter and are connected in the filter screen, be equipped with thereon Automatic exhaust steam valve；Flushing pump, the flushing pump are set to outside the cartridge filter and the water storage cylinder, water inlet end and the water storage Cylinder connection, water outlet are connected to the rotary nozzle；Detection container, the detection container be set to the cartridge filter it is outer and with institute State cartridge filter connection；And control module, the control module include the water level switch being set in the detection container, the control Molding block is also electrically connected with the inlet valve and the flushing pump respectively；The control module is when its water level switch starts, control The inlet valve is made to close and start the flushing pump certain time to draw water out of described water storage cylinder by the rotary nozzle The filter screen is cleaned.

Further, the control module is when its water level switch continuously uninterruptedly starts certain time, control it is described into Water valve closes and starts the flushing pump.

Further, the detection container top, which is provided with, is connected to its exhaust that is internal, being equipped with automatic exhaust steam valve Pipe.

Further, the detection container includes container casing and covers at the sealing cover at the top of the container casing, institute Water level switch is stated to be connected and fixed on the sealing cover and protrude into preset height position in the container casing, the container casing Bottom is connected to by pipeline with the cartridge filter；The exhaust pipe is set to the container casing top or the sealing cover Above and with the container casing inside it is connected to.

Further, the position on the inside of the cartridge filter between filter screen outside is provided with sewage pipe, the row The blowdown valve being electrically connected with the control module is provided on dirty pipe, the control module controls the blowdown valve and opens to carry out Blowdown.

Further, it is provided with the back water pump being electrically connected with the control module outside the water storage cylinder and the cartridge filter, The water inlet end of the back water pump is connected to the water storage cylinder；The control module includes duplex water level switch, the duplex water level Switch is set in the water storage cylinder, and the control module is in the duplex water level switch in the first preset height startup control system The return water pump startup, and in the duplex water level switch in the second preset height starting lower than first preset height The back water pump is controlled to stop；The control module includes simply connected water level switch, and the simply connected water level switch is set to the storage In water drum, the control module starts in the simply connected water level switch in the third preset height for being higher than first preset height When control the inlet valve and close.

Further, the control module includes water level switch in detection container as the first water level switch, further includes First to third intermediate relay, first to the 5th time relay, and first, third, the 5th time relay are to be powered to prolonging When connect relay, the second, the 4th time relay is that on-delay disconnects relay；The connection of first water level switch one end The normally-closed contact of the first intermediate relay and the coil of first time relay are sequentially connected in series in DC power supply, the other end；It is described The other end of first water level switch is also sequentially connected in series the normally opened contact of first time relay and the coil of second time relay； Normally opened contact one end of second intermediate relay be connected to DC power supply, the other end connect second time relay it is normally opened The coil of contact and the first intermediate relay；The coil of second intermediate relay, the coil of the third time relay, the 4th The coil of the time relay, the coil of the 5th time relay and third intermediate relay respectively with the first intermediate relay Coils from parallel connection of coils, be also in series between the normally opened contact of second time relay and the coil of the 4th time relay third time after The normally opened contact of electric appliance, the coils from parallel connection of coils of flushing pump and the first intermediate relay, and flushing pump are normal with second time relay Open the normally opened contact that the 4th time relay is also in series between contact, the coils from parallel connection of coils of blowdown valve and the first intermediate relay, And the normally opened contact of the 5th time relay is also in series between blowdown valve and the normally opened contact of second time relay；Described Normally-closed contact one end of three intermediate relays is connected to DC power supply, other end series connection inlet valve.

Further, the control module further includes simply connected water level switch in water storage cylinder as the second water level switch, double Join water level switch as third water level switch and the 4th water level switch, further includes that the 4th to the 6th intermediate relay and button are opened It closes；The normally closed touching of the 6th intermediate relay is also in series between the normally-closed contact and DC power supply of the third intermediate relay Point；Second water level switch one end is connected to the coil of DC power supply, the other end the 6th intermediate relay of series connection；The third Water level switch, the 4th water level switch, the 4th intermediate relay coil be followed in series to form a branch, third water level is opened in branch One end of pass is connected to DC power supply；The normally opened contact of 4th intermediate relay is in parallel with the 4th water level switch, in the 5th Between the coil of relay and the coils from parallel connection of coils of the 4th intermediate relay, and back water pump connect AC power source, the 5th intermediate relay Normally opened contact and return water series connection of pumps；Further, described button switch one end is connected to DC power supply, the other end is connected to Between the normally opened contact of one time relay and the coil of second time relay.

Further, circle is installed at the top of the water storage cylinder, sealing cover is installed at the top of the upper circle, the upper circle with Periphery between the sealing cover passes through rubber seal rings for seal；The simply connected water level switch and the duplex water level switch are fixed In on the sealing cover and preset height position that is respectively protruding into inside the water storage cylinder；The company of being provided at the top of the water storage cylinder Pass to its exhaust pipe that is internal, being equipped with automatic exhaust steam valve.

Further, the cartridge filter main header casing is equipped with upper cover, and the periphery between the upper cover and the cartridge filter passes through Rubber seal rings for seal；The upper cover bottom is provide with filter screen when being formed with water fender in installation to the cartridge filter；Institute It states upper cover bottom centre and is formed with mounting base, transit joint is equipped in the mounting base, rotary nozzle one end connection is solid It is integrally formed due on the transit joint and then with the upper cover；The filter screen is cupuliform filter screen.

The automatic filtering unit of the utility model, has the following beneficial effects:

The liquid level of cartridge filter is detected to start automatic cleaning process by detection container, is preferably solved existing automatic clear The low pressure such as fish jar or the filtration problem without water pressuring system can not be applied to by washing filter device.

Using rotary nozzle replace motor-driven cleaning device, make overall structure tend to simply, reduce volume, reduction at This.

With filter screen replace the prior art used in filter cotton, can be by Rapid Cleaning, to avoid blocking；

Automatic exhaust steam valve is arranged in water storage cylinder can guarantee that the filtered water energy of cartridge filter smoothly flows into water storage cylinder.

Detailed description of the invention

Fig. 1 is the perspective view of the utility model automatic filtering unit.

Fig. 2 is the top view of automatic filtering unit shown in Fig. 1.

Fig. 3 is the cross-sectional view of cartridge filter in automatic filtering unit shown in Fig. 1.

Fig. 4 is the cross-sectional view of detection container in automatic filtering unit shown in Fig. 1.

Fig. 5 is the cross-sectional view of water storage cylinder in automatic filtering unit shown in Fig. 1.

Fig. 6 is the circuit structure diagram of control module in automatic filtering unit shown in Fig. 1.

Specific embodiment

The utility model is described in detail with embodiment with reference to the accompanying drawing.

Fig. 1 and Fig. 2 are please referred to, the utility model provides a kind of automatic filtering unit, is applicable in but is not limited to in fish jar Water be filtered.The automatic filtering unit includes: cartridge filter 1, water storage cylinder 2, flushing pump B1, detection container 3 and control mould Block.

In conjunction with Fig. 3 refering to being provided with filter screen 11 in cartridge filter 1, rotary nozzle 12, cartridge filter are provided in filter screen 11 It is equipped with water inlet pipe 10 on 1 barrel, is equipped with inlet valve F2 on the water inlet pipe 10.Water storage cylinder 2 and cartridge filter 1 are two opposite Independent cylinder, water storage cylinder 2 are arranged in the outside of cartridge filter 1 and in the filter screens 11 that are connected in cartridge filter 1.Flushing pump B1 is set It is placed in outside cartridge filter 1 and water storage cylinder 2, the water inlet end of flushing pump B1 is connected to water storage cylinder 2, water outlet and rotary nozzle 12 connect It is logical.Water level switch SW1 is equipped in detection container 3, detection container 3 is set to 1 outside of cartridge filter and is connected to cartridge filter 1.Control Module is electrically connected with inlet valve F2 and flushing pump B1 respectively, and, the water level switch SW1 in control module is set to detection container 3 It is interior.

Cause in cartridge filter 1 water level to increase since pollutant increases blocking filter screen 11 and reach water level in detection container 3 When the priming level of switch SW1, water level switch SW1 starting, control module control inlet valve F2 is closed, is started the flushing simultaneously Pump B1 work certain time extracts filtered water out of water storage cylinder 2 in turn and is carried out clearly by rotary nozzle 12 to filter screen 11 It washes.Wherein, rotary nozzle 12 using water centrifugal force and reaction force carry out rotary spray so as to filter screen 11 in all directions It is cleaned.Motor cleaning device is replaced using rotary nozzle 12, makes that the overall structure of the automatic filtering unit is simpler, volume It is smaller, cost is lower.The stopping state of filter screen 11 is detected using detection container 3 to start flushing pump B1 work certain time In a manner of being cleaned by rotary nozzle 12 to filter screen 11, hardware configuration is simple and realizes automation.

Preferably, control module control should after water level switch SW1 continuously uninterruptedly starts preset time in detection container 3 Inlet valve F2 is closed, is started flushing pump B1 simultaneously, can prevent the malfunction as caused by liquid fluctuating in detection container 3 in this way Make.

In one embodiment, with continued reference to Fig. 1, setting is connected to its internal exhaust pipe 31 in detection container 3, should Automatic exhaust steam valve is preferably provided on exhaust pipe 31.Exhaust pipe 31 will test the air in container 3 via automatic exhaust steam valve in time Discharge guarantees that detection container 3 will not keep the water level of detection container 3 and the water level of cartridge filter 1 different due to upper layer air barrier It causes.

Specifically, as shown in figure 4, the detection container 3 includes container casing 32 and covers at the top of container casing 32 Sealing cover 33.Water level switch SW1 in control module, which is connected and fixed on sealing cover 33 and protrudes into, presets height in container casing 32 Position is spent, 32 bottom of container casing is connected to by pipeline with cartridge filter 1, shows that filter screen 11 occurs when water level reaches the height More serious blocking needs to clean it in turn.Above-mentioned exhaust pipe 31 is set to 32 top of container casing or sealing cover On 33 and be connected to inside container casing 32.

In one embodiment, with continued reference to Fig. 3,1 inside of cartridge filter and filter screen are provided with blowdown between 11 outside Pipe 13 is provided with blowdown valve F1 on sewage pipe 13, and blowdown valve F1 is also further electrically connected with control module.Control module control Blowdown valve F1 open to carry out blowdown, specifically, control module can flushing pump B1 start a period of time after control of sewage disposal valve F1 is opened.On the one hand the pollutant of accumulation precipitating has been discharged, small part water can be discharged on the other hand to meet fish jar and need in right amount The requirement of a little new water of supplement.Flushing pump B1 and blowdown valve F1 can be run simultaneously whithin a period of time, can also successively be carried out, specifically It is designed depending on demand.

In one embodiment, it is provided with back water pump B2, back water pump outside with continued reference to Fig. 1, water storage cylinder 2 and cartridge filter 1 The water inlet end of B2 is connected to water storage cylinder 2, and the water outlet of back water pump B2 is connected to the containers such as fish jar, back water pump B2 further with control The electrical connection of molding block.As shown in figure 5, control module includes duplex water level switch SW3, SW4, duplex water level switch SW3, SW4 are set It is placed in water storage cylinder 2, control module is in the first preset height startup control back water pump B2 in duplex water level switch SW3, SW4 Starting, and the second preset height startup control return water lower than the first preset height is in duplex water level switch SW3, SW4 It pumps B2 to stop, this avoid the frequent startings of back water pump B2.

Further, with continued reference to Fig. 5, control module includes simply connected water level switch SW2, simply connected water level switch SW2 setting In in water storage cylinder 2, control module is in simply connected water level switch SW2 in the third preset height startup control for being higher than the first preset height Inlet valve F2 processed is closed, and which prevent the spillings of water in water storage cylinder 2.

As shown in Figure 1, above-mentioned flushing pump B1 and back water pump B2 respectively can be with the threeways 26 being set in water storage cylinder 2 One end is attached.

Further, with continued reference to Fig. 5, circle 22 is installed at the top of water storage cylinder 2, upper 22 top of circle is equipped with sealing cover 23, the periphery between upper circle 22 and sealing cover 23 is sealed by rubber seal 24.Simply connected water level switch SW2 and duplex water level are opened SW3, SW4 is closed to be fixed on sealing cover 23 and be respectively protruding into the preset height position inside water storage cylinder 2.Preferably, in order into one Step improves the filtering to water, and the water outlet of back water pump B2 is removably equipped with fine filter, also facilitates when fine filter is long Phase is convenient for changing when bad using rear filter effect.Preferably, the top of water storage cylinder 2, which is provided with, is connected to its internal exhaust pipe 21, automatic exhaust steam valve 25 is also equipped on the exhaust pipe 21, for excluding the air in water storage cylinder 2, to guarantee through 1 mistake of cartridge filter Water energy after filter smoothly flows into water storage cylinder 2, and then realizes and recycle to water.Preferably, detection container 3 and water storage cylinder 2 An automatic exhaust steam valve can be shared, for example, automatic exhaust steam valve 25, detection container 3 are only arranged on the exhaust pipe 21 of water storage cylinder 2 Exhaust pipe 31 be connected to 25 at the automatic exhaust steam valve of water storage cylinder 2.

In one embodiment, with continued reference to Fig. 3,1 main header casing of cartridge filter is equipped with upper cover 14, upper cover 14 and cartridge filter 1 Between periphery sealed by rubber seal 15.When 14 bottom of upper cover is formed with water fender 18 in installation to cartridge filter 1 It is provide with filter screen 11.14 bottom centre of upper cover is also formed with mounting base 16, and transit joint 17, rotation spray are equipped in mounting base 16 First 12 one end is connected and fixed on transit joint 17 and then is integrally formed with upper cover 14.Preferably, the filter screen 11 is cupuliform mistake Strainer 11.

In one embodiment, as shown in Figure 1, the outlet pipe of the water inlet pipe 10 of cartridge filter 1, back water pump B2 passes through one or three Pass ball valve 19 and fish jar etc. are connected to.In addition, in above-described embodiment, be connected to pipe-line system between each component according to circumstances from Intuitively, it arbitrarily selects or is composed between bend pipe, hose and movable connecting piece.

The automatic cleaning process of the automatic filtering unit is briefly as follows: the water of the pollutants such as hairtail excrement being sucked out from fish jar Enter cartridge filter 1 after inlet valve F2, then flow through the cupuliform filter screen 11 in cartridge filter 1, filtered water flows into Water storage cylinder 2, flows back in fish jar after pressurized and (fine filter of fish jar can be cooperated to use to reach more effect), the dirts such as fish excrement Dye object is then isolated in outside filter screen 11, strainer is blocked with outer being continuously increased for pollutant of filter screen 11, in cartridge filter 1 Water level gradually rises, when the water level in the detection container 3 being connected to cartridge filter 1 reaches the priming level of its water level switch SW1, Start automatic cleaning procedure.

The automatic cleaning procedure carries out under the control of control module.The control module often can be by way of soft or hard combination It realizes.The utility model preferably provides a kind of control circuit of very fast, the lower-cost pure hardware of response speed to realize.

Wherein, electromagnetic valve usually can be used in above-mentioned each valve, including inlet valve F2, blowdown valve F1 etc..

Referring to Fig. 6, the control circuit include above be located at detection container 3 in the first water level switch (for simply connected water Bit switch) SW1, the simply connected water level switch in water storage cylinder 2 i.e. the second water level switch SW2, the duplex water in water storage cylinder 2 Bit switch, that is, third water level switch SW3 and the 4th water level switch SW4 further includes first to the 6th intermediate relay J0~J5 and One to the 5th time relay T0~T4.Wherein, first time relay T0, third time relay T2 and the 5th time relay Device T4 is switched on delay and connects relay, and the second time relay T1, the 4th time relay T3 are switched on delay and disconnect relay Device.

Its circuit structure is specific as follows:

First one end water level switch SW1 is connected to DC power supply (12V), the other end is sequentially connected in series the first intermediate relay J0 Normally-closed contact and first time relay T0 coil.

The other end of first water level switch SW1 is also sequentially connected in series normally opened contact and the second time of first time relay T0 The coil of relay T1.Namely the branch that the normally opened contact of first time relay T0 and the coil of the second time relay T1 are constituted Road, the branch constituted with the coil of the normally-closed contact of the first intermediate relay J0 and first time relay T0 are at parallel relationship.

Normally opened contact one end of second intermediate relay is connected to DC power supply, the second time relay T1 of other end series connection Normally opened contact and the first intermediate relay J0 coil.

The coil of second intermediate relay J1, the coil of third time relay T2, the 4th time relay T3 coil, The coil and third intermediate relay J2 of 5th time relay T4 coils from parallel connection of coils with the first intermediate relay J0 respectively.And And second time relay T1 normally opened contact and the 4th time relay T3 coil between be also in series with third time relay The normally opened contact of device T2.Further, the flushing pump B1 also coils from parallel connection of coils with the first intermediate relay J0, and flushing pump B1 and The normally opened contact of the 4th time relay T3 is also in series between the normally opened contact of two time relay T1；Blowdown valve F1 is also with The coils from parallel connection of coils of one intermediate relay J0, and is also in series between blowdown valve F1 and the normally opened contact of the second time relay T1 The normally opened contact of five time relay T4.That is, the normally opened contact and the 4th time relay T3 of third time relay T2 Coil constitute branch, the 4th time relay T3 normally opened contact and flushing pump B1 constitute branch and the 5th time after The branch three that the normally opened contact and blowdown valve F1 of electric appliance T4 is constituted is at parallel relationship.

Normally-closed contact one end of third intermediate relay J2 is connected to DC power supply, other end series connection inlet valve F2.

Foregoing circuit structure, which is mainly used in, carries out automation control, working principle to electric component each in cartridge filter 1 It is briefly discussed below:

First water level switch SW1 is used to detect the chocking-up degree of filter screen 11；When the filter screen 11 in cartridge filter 1 blocks When, water level rises the floating ball for floating water level switch, and the first water level switch SW1 connection first time relay T0 obtains electric；

First time relay T0 is for preventing from malfunctioning；As the first water level switch SW1 connection, first time relay T0 Must be electric, divide if the Time Continuous that the first water level switch SW1 is connected is no more than the setting time 3 that first time relay T0 is enumerated Clock, then caused by control circuit is considered the water-level fluctuation in cartridge filter 1, first time, relay T0 will not be acted, after 3 minutes If the first water level switch SW1, first time relay T0 is acted also if on-state, i.e., its normally opened contact is connected, and at this time second Time relay T1 obtains electric.

Second time relay T1 follows bad total time for controlling automatic cleaning, and the setting time enumerated is 3 minutes；The Two time relay T1 obtain it is electric after its normally opened contact connect, the first intermediate relay J0, the second intermediate relay J1, third time Relay T2, the 5th time relay T4, third intermediate relay J2 simultaneously it is electric, which enters automatic cleaning Mode.

First intermediate relay J0 is for disconnecting first time relay T0 to avoid first time relay T0 malfunction； First intermediate relay J0 obtain it is electric after, normally-closed contact disconnect and first time relay T0 power off.

Second intermediate relay J1 is used for system self-insurance；When the normally opened contact of second time relay T1 is connected, in second Between relay J1 obtain electric its normally opened contact and connect, the second time relay T1 is supplied through the normally opened contact end of the second intermediate relay J1 Electricity, the on off operating mode of the first water level switch SW1 no longer influences the progress of cleaning model at this time.

Third intermediate relay J2 is for controlling inlet valve；After third intermediate relay J2 obtains electric, normally-closed contact is disconnected It opens, powers off inlet valve F2, cartridge filter 1 stops absorbing water from fish jar.

Third time relay T2 is used to exclude the product that can not be excluded in time in cartridge filter 1 due to the blocking of filter screen 11 Water sets apart, and the setting time enumerated is 1 minute.Its normally opened contact is connected after third time relay T2 is powered 1 minute, the Four time relay T3 obtain electric.

For 4th time relay T3 for controlling washing time, the setting time enumerated is 20 seconds；4th time relay T3 obtain it is electric after its normally opened contact connect, flushing pump B1 work 20 seconds.

For 5th time relay T4 for starting blowdown valve F1 blowdown, the setting time enumerated is 75 seconds；5th time after Its normally opened contact is connected after electric appliance T4 is obtained electric 75 seconds, and blowdown valve F1 starts blowdown.Flushing pump B1 can also continue to rinse at this time, Preferably the dirt in cartridge filter 1 can be discharged in this way.It is, of course, also possible to be controlled by the setting to the corresponding time relay Flushing pump B1 is in halted state.

And after entire cleaning process, flushing pump B1, blowdown valve F1 are closed, and inlet valve F2 intakes again, are continued pair Water in fish jar carries out circulating filtration.

In a preferred embodiment, with continued reference to Fig. 6, between the normally-closed contact and DC power supply of third intermediate relay J2 Also it is in series with the normally-closed contact of the 6th intermediate relay J5.

Second one end water level switch SW2 is connected to the coil of DC power supply, the 6th intermediate relay J5 of other end series connection.

Third water level switch SW3, the 4th water level switch SW4, the 4th intermediate relay J4 coil be followed in series to form one Branch, one end of third water level switch SW3 is connected to DC power supply in the branch.

The normally opened contact of 4th intermediate relay J3 is in parallel with the 4th water level switch SW4, the line of the 5th intermediate relay J4 The coils from parallel connection of coils of circle and the 4th intermediate relay J3.And back water pump B2 connection alternating current 220V power supply (certainly can also be according to back water pump Voltage require the corresponding power supply of reconfiguration), the normally opened contact of the 5th intermediate relay J4 is connected with back water pump B2.

In this embodiment, the second water level switch SW2 is used to control the peak level in water storage cylinder 2 to prevent water storage cylinder 2 Interior water overflows；When the water level in water storage cylinder 2 reaches highest defined position, the second water level switch SW2 connect the 6th among after The normally-closed contact of electric appliance J5, the 6th intermediate relay J5 disconnect, and inlet valve F2 stops water inlet.

Third water level switch SW3, the 4th water level switch SW4 are used to set the working water level section of back water pump B2, third water level Switch SW3 is located at low water level, the 4th water level switch SW4 is located at high water level；When the water level in water storage cylinder 2 is more than or reaches the 4th water The 5th intermediate relay J4 obtains its electric normally opened contact and connects back water pump B2 start-up operation when the water level of bit switch SW4.

4th intermediate relay J3, the self-insurance for the 4th water level switch SW4；4th intermediate relay J3 obtain it is electric after its often Open contact connection, if at this time the water level decreasing in water storage cylinder 2 to be lower than the water level back water pump B2 of the 4th water level switch SW4 also can be after Continuous work.The purpose for increasing by the 4th water level switch SW4 is in order to avoid the frequent starting of back water pump B2.

In a preferred embodiment, with continued reference to Fig. 6, which further includes a button switch AN, which opens Close that the one end AN is connected to DC power supply, the other end is connected to the normally opened contact and second time relay of first time relay T0 Between the coil of T1.Button switch AN is manual control, when not needing the first water level switch SW1 and first in initial process Between relay T0 participation, can be used for testing or the artificial above-mentioned cleaning process of forced service.

In foregoing circuit structure, the coil of time relay T0~T4, the coil of intermediate relay J0~J5 and flushing Pump B1, back water pump B2, blowdown valve F1, inlet valve F2 are grounded setting.

The automatic filtering unit of the utility model, has the following beneficial effects:

The liquid level of cartridge filter 1 is detected to start automatic cleaning process, preferably by the water level switch SW1 in detection container 3 Ground, which solves existing automatic cleaning filter, can not apply to the low pressure such as fish jar or the filtration problem without water pressuring system.

Motor-driven cleaning device is replaced using rotary nozzle 12, makes overall structure tend to simply, reduce volume, reduces Cost.

Filter cotton used in the prior art is replaced with filter screen 11, it can be by Rapid Cleaning, to avoid blocking.

Relay is connected by setting on-delay, can be avoided since the fluctuation of water level when just intaking in cartridge filter 1 is drawn Play the malfunction of detection container 3.

There is automatic exhaust steam valve 25 by the way that exhaust pipe 31 is arranged in detection container 3 and is arranged at least in water storage cylinder 2 Exhaust pipe 21, exhaust pipe 31 in detection container 3 in water storage cylinder 2 automatic exhaust steam valve 25 or exhaust pipe 31 be connected to, Neng Goubao It demonstrate,proves 3 top of detection container and is in passive state always, enable detection container 3 accurately to detect liquid level, and water storage cylinder 2 can be made Top is in passive state always, so that filtered water energy is enough smoothly to flow into water storage cylinder 2.

Starting and stopping for back water pump B2 is controlled by setting duplex water level switch SW3, SW4, to avoid back water pump B2 It is damaged due to frequent starting.

The above is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all benefits The equivalent structure or equivalent flow shift made by the utility model specification and accompanying drawing content, is applied directly or indirectly in it His relevant technical field, is also included in the patent protection scope of the utility model.

Claims (9)

1. a kind of automatic filtering unit characterized by comprising

Cartridge filter is provided with filter screen in the cartridge filter, rotary nozzle, the cylinder of the cartridge filter is provided in the filter screen The water inlet pipe for being provided with inlet valve is equipped on wall；

Water storage cylinder, the water storage cylinder are set to outside the cartridge filter and are connected in the filter screen, thereon equipped with automatic exhaust Valve；

Flushing pump, the flushing pump are set to outside the cartridge filter and the water storage cylinder, water inlet end is connected to the water storage cylinder, Water outlet is connected to the rotary nozzle；

Detection container, the detection container are set to outside the cartridge filter and are connected to the cartridge filter；

And control module, the control module include the water level switch being set in the detection container, the control module is also It is electrically connected respectively with the inlet valve and the flushing pump.

2. automatic filtering unit according to claim 1, it is characterised in that:

The detection container top, which is provided with, is connected to its exhaust pipe that is internal, being equipped with automatic exhaust steam valve.

3. automatic filtering unit according to claim 2, it is characterised in that:

The detection container includes container casing and covers at the sealing cover at the top of the container casing, and the water level switch connects Be fixed on the sealing cover and protrude into preset height position in the container casing, the container casing bottom by pipeline with The cartridge filter connection；

The exhaust pipe be set on the container casing top or the sealing cover and with connect inside the container casing It is logical.

4. automatic filtering unit according to claim 1, it is characterised in that:

Position between on the inside of the cartridge filter and on the outside of the filter screen is provided with sewage pipe, be provided on the sewage pipe with The blowdown valve of the control module electrical connection, the control module control the blowdown valve and open to carry out blowdown.

5. automatic filtering unit according to claim 4, it is characterised in that:

Be provided with the back water pump being electrically connected with the control module outside the water storage cylinder and the cartridge filter, the back water pump into Water end (W.E.) is connected to the water storage cylinder；

The control module includes duplex water level switch, and the duplex water level switch is set in the water storage cylinder, the control Module is in duplex water level switch return water pump startup described in the first preset height startup control system, and in the duplex water level The back water pump described in the second preset height startup control system lower than first preset height is switched to stop；

The control module includes simply connected water level switch, and the simply connected water level switch is set in the water storage cylinder, the control Module is in simply connected water level switch water inlet described in the third preset height startup control system for being higher than first preset height Valve is closed.

6. automatic filtering unit according to claim 5, it is characterised in that:

The control module includes water level switch in detection container as the first water level switch, further includes first among third Relay, first to the 5th time relay, and first, third, the 5th time relay are that on-delay connects relay, the Two, the 4th time relay is that on-delay disconnects relay；

First water level switch one end is connected to DC power supply, the other end is sequentially connected in series the normally-closed contact of the first intermediate relay With the coil of first time relay；

The other end of first water level switch is also sequentially connected in series the normally opened contact and the second time relay of first time relay The coil of device；

Normally opened contact one end of second intermediate relay is connected to DC power supply, the other end is connected second time relay The coil of normally opened contact and the first intermediate relay；

When the coil of second intermediate relay, the coil of the third time relay, the coil of the 4th time relay, the 5th Between relay coil and the third intermediate relay coils from parallel connection of coils with the first intermediate relay respectively, second time relay Normally opened contact and the 4th time relay coil between be also in series with the normally opened contact of the third time relay, flushing pump with The coils from parallel connection of coils of first intermediate relay, and when being also in series with the 4th between flushing pump and the normally opened contact of second time relay Between relay normally opened contact, the coils from parallel connection of coils of blowdown valve and the first intermediate relay, and blowdown valve and second time relay Normally opened contact between be also in series with the normally opened contact of the 5th time relay；

Normally-closed contact one end of the third intermediate relay is connected to DC power supply, other end series connection inlet valve.

7. automatic filtering unit according to claim 6, it is characterised in that:

The control module further includes simply connected water level switch in water storage cylinder as the second water level switch, duplex water level switch conduct Third water level switch and the 4th water level switch further include the 4th to the 6th intermediate relay and button switch；

The normally closed touching of the 6th intermediate relay is also in series between the normally-closed contact and DC power supply of the third intermediate relay Point；

Second water level switch one end is connected to the coil of DC power supply, the other end the 6th intermediate relay of series connection；

The third water level switch, the 4th water level switch, the 4th intermediate relay coil be followed in series to form a branch, branch One end of middle third water level switch is connected to DC power supply；

The normally opened contact of 4th intermediate relay is in parallel with the 4th water level switch, the coil and the 4th of the 5th intermediate relay The coils from parallel connection of coils of intermediate relay, and back water pump connects AC power source, the normally opened contact and back water pump string of the 5th intermediate relay Connection；

Further, described button switch one end is connected to DC power supply, the other end is connected to the normally opened of first time relay Between contact and the coil of second time relay.

8. automatic filtering unit according to claim 5, it is characterised in that:

Circle is installed at the top of the water storage cylinder, sealing cover is installed at the top of the upper circle, the upper circle and the sealing cover it Between periphery pass through rubber seal rings for seal；

The simply connected water level switch and the duplex water level switch are fixed on the sealing cover and are respectively protruding into the water storage cylinder Internal preset height position；

It is provided at the top of the water storage cylinder and is connected to its internal exhaust pipe, the automatic exhaust steam valve in the water storage cylinder is assemblied in On the exhaust pipe.

9. automatic filtering unit according to claim 1, it is characterised in that:

The cartridge filter main header casing is equipped with upper cover, and the periphery between the upper cover and the cartridge filter is close by rubber seal Envelope；

The upper cover bottom is provide with filter screen when being formed with water fender in installation to the cartridge filter；

The upper cover bottom centre is formed with mounting base, and transit joint, described rotary nozzle one end are equipped in the mounting base It is connected and fixed on the transit joint and then is integrally formed with the upper cover；

The filter screen is cupuliform filter screen.