DE2023302A1 - Filter device - Google Patents

Description

_{12th Hal 197O}

Gzdre / hk

AquaMatic, Inc., Rockford, Illinois, U.S.A.

Filter device

The invention relates essentially to a filter device. Filters clog and sweat with use. It is therefore necessary to maintain their effectiveness necessary to backwash them from tent to tent. Backwash can be carried out by operating manual valves or by timing devices that are set to predetermined Working times. Of course, a filter can be very quick Contaminants accumulate or this filter can last longer Remain in operation before backwashing is required & Lich will. The use of automatic timers or manual valves may require cleaning of the filter long before it is backwashed, or else it may not be at the time of rewinding needs to be cleaned. For this reason, it is preferable to carry out a backwash if there is a prejudice Amount of sludge or debris has accumulated in the filter,

The US Pattnt No. 2 366 903 to@ischr.etbt tine? £ Lt »r« JtarlcfctuBg with a valve controlled by one * »» Muchaniamis? This mechanism XaI did the flitekepUlimg "in, know 3'thor. pressure through the collection. vtm Fre% d; jtc> f, fön in increased by WX ; Except dar AnsainfBlum, ' from Premdato ΐ f-i-js. aui am F cloth can, however, aucii ariüöi ¹ ? (lt \ ky \ -d HU- siiit αϊ \ ~ \ ύ \\ νη <$

OÜ'aHX / MSi ORIGINAL

Inlet pressure are present; if z. B. the supply

pressure changes, the inlet pressure also changes independently of a> - · «·

of / possible clogging of the filter. Hence this is Prior art device has been limited to a system in which the supply pressure is relatively constant.

The aim of the invention is to provide a new filter system which provides automatic backwashing of the filter after the filter has accumulated a predetermined amount of foreign matter.

A further aim of the invention is to create a filter device that works independently of the loading of the ¥ ®rsorgaiigsdruckes.

Another aim of the invention is to provide ®a ₉ © in atues multi-way valve, which consists at least partially of identical plastic parts. According to the invention, the task is solved by creating a filter egg with a filter inside, a valve to control the flow through the filter tank, and a pressure device that works with the filter tank The connection is available to determine the pressures on the soon side of the filter and to direct the movement of the valve in the backwashing division as soon as a pre-tampered pressure differential is activated, and a timer which is connected to the pressure trap light device ₃ to the RÜcksptilzeit su baotitomen.

In a preferred embodiment according to the invention, the filter device has a tank which is one between the Has the inlet and the outlet located filter, via a liquid or gsiforma passing through the tank Filter medium; a valve that can be put in a filter position to block the flow of liquid or gaseous Medium into the fi rst establishment, and that in a Can the backwash position be moved to reverse the flow through the tank to backwash the filter? an adjustment device, to move the valve between the positions having a switch for controlling the actuation; a pressure-sensitive device, which is connected to the tank by lines, to monitor the pressures on both sides to detect the filter and to operate the switch so that it operates the adjusting device and the valve in the Backwash position moves as soon as a predetermined pressure differential is reached; and a timer connected to the pressure sensitive devices to control the adjustment device to return the valve to the filter position in a predetermined Time interval to operate.

In a preferred embodiment, the pressure sensitive Device takes the form of a diaphragm actuator with chambers on opposite sides of the diaphragm, a Spring that flexibly pushes the diaphragm in one direction with a force equal to the predetermined pressure differential, a shaft connected to the wall and movable therewith, which actuates the switch as soon as the pressure differential reaches the initial is.

009847/1666

The timer is preferably connected to the pressure-sensitive means and has a valve disposed between one of the lines Capillary tube, in order to limit the flow therethrough. A fine mesh screen is positioned at the end of Kappilarrohres to prevent the ingress of particles which might clog the pipe.

In one embodiment, the adjusting device has an electric motor and a circuit for the motor. When the switch is pressed , the is. Circuit to the motor is closed and a second switch adjacent to the motor is controlled by the position of the valve to break the circuit when the valve reaches its other position.

Stell- In another embodiment, the Ve * device is actuated by a liquid or gaseous medium and has a diaphragm connected to the valve stem. The switch directs pressure to one side of the diaphragm or the other to move the valve stem between its positions.

In a preferred embodiment, the multi-way valve is constructed from two pairs of identical plastic parts and such arranged that a valve seat is integral with the plastic part is shaped, and yet the parts are arranged to be are inserted end to end in an adjacent part, with their valve seats being coaxial *

Further features, advantages and possible applications of the new invention emerge from the attached illustrations of exemplary embodiments and from the following description.

0098U / 1666 bad original

Show it:

Fig. 1 is essentially a block diagram of an embodiment according to the present invention, which is used in a swimming pool,

Fig. 2 is an enlarged section through the druckempfind- M Liehe device and the associated, actuated by a liquid or gaseous medium · timer means;

Fig. 3..

and 4 enlarged sections of the valve and adjacent Control devices of the execution form of the figure and the filter and backwash positions f

Fig. 5

and FIG. 6 partially sectioned and partially schematic views of another embodiment according to the invention and the filter and backwash positions. W.

Figure 1 shows a swimming pool 10 with an outlet 11 at its bottom. A line 12 is connected to the outlet 11 and leads to the inlet of the pump £. Is another line 13 connected to the outlet of the pump P and to the inlet of a Möhrwegeventils 15? the outlet is at the bottom of the valve in the embodiment shown, the filter tank 20 has at its multiple end a connecting inlet line 22, and at its lower end a connected outlet line 24. The filter tank has a filter (not shown ) between the inlet and AuslaBleitungen for filtering a liquid (or gaseous) medium _"r the

009847/1688

is passed in one direction from the entrance to the exit. Lines 22 and 24 are connected to the multi-way valve 15 as shown. In normal operation, the pump delivers the water from the pool through lines 12, 13 and 22 to the top of the filter tank and the filtered water is returned through lines 24 and 16 to the pool. As mentioned earlier, the filter collects foreign matter during the filtering process and can be cleaned by backwashing it. During the backwashing operation, the multi-way valve 15 is brought into the backwashing position (described below) in which the liquid or gaseous medium is passed by the pump through the lines 13, 24 to the bottom of the filter tank 20. The backwashing liquid of the liquid or gaseous medium is then passed through the lines 22, and the multi-way valve 15 is led to a drain line 26.

The apparatus of the Iriiadung emSglieht it determine "when such backwashing is required and solves al $ movement of the multi-way valve in di © backwash from. For this purpose, a pressure sensitive device, generally designated by, is provided. In the embodiment shown in FIG. 2, the pressure sensitive device 30 has the form of a diaphragm actuation device with housing parts 31 »32 which clamp a diaphragm 32 between them. The diaphragm 33 is movable in the Gefeites® and divided into the chambers 34 ₉ 3! 5 “A shaft 36 is connected to the diaphragm 33 and the bit moves” The shaft extends outside the G & hUusee disreh © la ® sleeve 37 in the housing part 31 »fingers 36a ⁵ and 3 & fe ⁸ are fastened on <ä @ m shaft 36 to form an IwtoIs in the following.

9847/1666

In this embodiment, a compression spring 38 is provided in the chamber 35 and the diaphragm 33 penetrates flexibly to the right (FIG. 2). Of course, the spring can be relocated with the same result; for example, one or more tension springs can be attached to the shaft 36. A line 42 is in communication with the chamber 34 and with the upper end of the filter tank 20. Similarly, a conduit 44 communicates with chamber 35 and with the bottom of the filter tank. In this way, the pressure-sensitive device 30 is in operative connection with the filter tank in order to determine the pressures on both sides of the filter. As shown in FIG. 1, manometers G 1 and G 2 are connected to lines 42 and 44, respectively. As soon as the filters clog, the difference between the pressures indicated by the pressure gauges G 1 and G 2 increases. Upon increasing of this differential is daa diaphragm 33 _moves: to the left (Figure 2). By selecting the strength of the spring 38 and the arrangement of the finger 36b can be the intend agreed set pressure differential to operate at de "the pressure-sensitive device 30th

In one embodiment, the multi-way valve 15 is provided with a valve stem 51 which has valve elements 52, 53 fastened thereon. A motor M is operatively connected to the valve stem 51 by means of a rotatable cam disk 54 and a connecting piece 55 in order to move the valve stem and the valve elements between the filter division (Plgur 3) and the backwash position (Plgur 4). A circuit is provided for connecting the motor M * to the network. The circuit has a power line 61 in which “la failure

008847/1688

S 1 interposed 1st. The power line 61 leads to "inen" two-pole changeover switch S 2 adjacent to the pressure-sensitive Means 30 to be switched by fingers 36a and 36b. Lines 62 and 63 lead from switch S 2 a second changeover switch S 3 adjacent to the motor M. The motor is also connected to a ground line 64. When operating will the previously described pressure sensitive device 30 is moved to the left by the pressure differential (Figure 2). BIa fingers 36b is provided in order to switch the switch S 2 to and around the To connect power line 61 to line 63 as soon as the predetermined pressure differential is reached. The switch S 3 is normally closed with respect to line 63 and thus closes the circuit to motor M. The motor M rotates then the cam 54 by 180 and thus moves the multi-way valve in the backwash position »In the backwash position the cam 54 is arranged so that the switch S 3 is switched to its second position, thereby closing the circuit interrupt and stop the engine.

A timing device actuated by the liquid or gaseous medium is in connection with the pressure-sensitive one Device 30 connected to control the time that the multi-way valve remains in the backwash position. To this For this purpose, a capillary tube 67 is provided in the line 44 to prevent the flow of liquid or gaseous medium back into the Chamber 35 limit. A fine-meshed filter cloth 68 is preferably provided at the end of the capillary tube 67, around the To prevent the entry of particles which could clog the tube 67. It has been found that one with a hole in on the order of 3.5 mm (0.014 inch) and a length of about 108 mm (4 1/4 inches) has a padding of about

009847/1686

3 minutes over a large pressure range. In other This device enables backwashing of words about 3 minutes. It goes without saying, however, that the rewind time is determined by many variables and depends mainly on the design of the entire system. -During rewinding, the diaphragm moves 33 to the right (Figure 2), and at a preselected time

-itioollgen

twoDoligen

the stop 36a switches the / umscnalter S 2 and forms one

Circle from the power line 61 over the line

and switch S 3 to motor M. The motor then turns the Cam 54 again by 180 ° until the switch S_ 3 in its original position switched tit »

In the embodiment shown, the switch £ 1 can also closed to create a circuit with line 63a, which is connected to the line 63. In this way a circle is closed directly to the motor M »around the Backwashing to be carried out independently of the pressure-sensitive device 30. After the end of the backwashing, the Switch S 1 returned to the automatic position, the circuit through lines 61 and 62 and through the Switch S 3 is made to bring the multi-way valve 15 back into the filter position.

In the device described above, backwashing is only carried out when a quantity of foreign matter has passed e has accumulated on the filter, what from dta pressure differential is measured. With this device, changes in the supply pressure remain ineffective. Additionally becomes the time of rewinding «inea of the liquid or gaseous medium operated Zeitmees & rasachaniemue automatically measured, the over a large area «the supply ** accurately measures the pressure.

00Ι847 / 1β 8

- ίο -

In another embodiment according to the invention (Figures 5 and 6) is the actuator for the multi-way valve operated by a liquid or gaseous medium instead of electrically operated. In this embodiment, the valve stem is 51 attached to a diaphragm 71 which is clamped on the circumference between the housing parts 72, 73, which are attached to one end of the multi-way valve 50. The diaphragm divides the housing into an upper chamber 74 and a lower chamber 75. openings 74a, 75a are connected to the upper and lower chamber in connection. When the upper chamber 74 is pressurized through the opening 74a, the diaphragm 71 moves in dl © shown in FIG Position and thereby moves the valve stem 51 into the RUckspUlstellung. In the same way, the diaphragm is in the position of FIG. 5 and the valve stem 51 is in the filter position moved when the lammer 75 through the opening 75 «* is pressurized. Lines 76, 77 are with the Outlets 74a or 75a and with a two-position valve 80 tied together.

Another line 81 connects the valve 80 to the pump P, while a drain line 82 connects the valve 80 to the drain. The valve 80 has an arm 83 which is provided for engagement by the fingers 36a or 36b in order to move the valve between its positions. In the position of FIG 76 nlt the BntHtrung bundt "is, Wt""" ie "the valve for the flüaelg © uuer gaseous" medium in d © r shown in Figure 6 position tetfinte .If M $ k connection üaig®k @ fes "t _t where oils Position of the M®krwegenveatils is reversed · With this ⁵ Aiasftthnmgsf @ nB lat

BATH

the pressure sensitive device 30 is identical to that shown in Figure 2 and the capillary tube 67 is in one of lines 42 or 44 are provided for the duration of rewinding to be timed. It is shown on line 42. In this way, the system is complete from the liquid or gaseous medium actuated and without any electrical control devices time-controlled.

Figures 3 and 4 show details of the

Multi-way valve 15. In this particularly advantageous embodiment, the multi-way valve is a structure made up of two pairs of identical plastic parts. One pair of the plastic parts forms the end parts 120, 120 ¹ , while the other pair forms intermediate parts 122, 122 '. In either case, the part is arranged such that a valve seat can be molded integrally with the plastic part, yet the parts are arranged such that Bie can be inserted into an adjacent part to form the assembly shown. These parts are molded from polyvinyl chloride or 30 # glass filled polyphenyloxide. However, other plastic parts can also be used. After molding, the individual parts are not built up as shown , and their superimposed parts are connected by welding, solvent-based bonding or epoxy resin bonding.

As mentioned above, the intermediate parts 122, 122 * are identical. The part 122 has an elongated ridge 126 , 61 extending between the upper and lower ends of the part, and a side opening 127 communicating with the chamber between the ends. The lamb is substantially uniform in diameter and a reduced diameter valve seat 128 is located at one end of the

0.0 9847/1666 bad original

Plastic part 122 and is molded integrally therewith. The valve seat 128 extends over the end of the plastic part and has an outer diameter approximately the diameter of the chamber 126 so that the valve seat extension can be inserted into the chamber of the other plastic part (e.g. part 120) according to the aforementioned method of assembly. W In this way, valve seat 128 is adjacent to the end of the parts. The intermediate part 122 'has the same parts which are designated in the drawing with the same reference number ^ ,, followed by a prime (·).

The end parts 120, 120 'are also identical. The part has a catchable chamber 136 and a side opening 137 communicating with the chamber. The end portion is formed with a valve seat 138 having an opening between its ends. The end part 120 ¹ has the same reference numbers as those in the drawing, but followed by a prime (').

The four parts 120, 120 ", 122 and 122" are end assembled and their valve seats form a common axis to allow the axial movement of the valve stem 51 so that the elements 52, 53 can close different openings when they be moved between the filter and backwash positions . As shown, an additional valve seat is formed by a ring 144 at the adjacent ends of the parts 122, 122 '. The ring 144 need not be positioned between these two parts However, because di · · part 122 assembled with a 122 * their integral VentHrfverlkngerungen can be _t, which engage in the other part. In other i

009847/1666

In other words, the ring 144 can be located at the junction of any two adjacent parts. The construction of valve elements 52,53 is the same as that shown and described in U.S. Patent No. 3,237,640, reference being made for a detailed description .

As described above, the device constitutes an automatic filter control device which effects backwashing of the filter after the filter has accumulated a predetermined amount of foreign matter; changes in the supply pressure are of no importance for the operation. VIe shown, a sensor control activated by a liquid or gaseous medium determines the backwashing of the automatic filter control device according to the invention. The device also has an improved multi-way valve assembly consisting of identical plastic parts.

009047/1668

Claims (9)

- 14 - Claims Filter device with a tank having a filter for filtering a liquid or gaseous medium passed through the tank in one direction from the tank inlet to the tank outlet, characterized in that a valve 15 in a filter position (Figure 3 or Figure 5) for guiding a flow a liquid or gaseous medium in one direction and in a RUckipUlstellung (Figure h or Figure 6) to reverse the flow through the tank for backwashing the filter, that an adjusting device (H etc. or 71 etc.) the valve between these positions moves that a pressure-sensitive device 30 is in operative connection with the tank 20 to detect the pressures on both sides of the filter and to actuate the adjustment device to move the valve to the backwash position as soon as a predetermined pressure differential is reached, and there is a timer the pressure-sensitive device assigned lit to the adjusting device for the return position of the Actuate valve in the filter position after a predetermined time interval. 2. Filter device naoh claim 1, characterized in that that the adjustment device has a switch (32 or 80), and dl · pressure-sensitive device an öehfiuee (31 »32) has »soft · tint movable wall (33) bat, dl · dleielbi in «in · harvest and« ine second pressure chamber (34, 35) divided that a device (36) connected to the wall and is thus movable, the switch in its respective To put positions, wherein a first line (42) the first pressure chamber with the inlet side of the tank and a second line (44) connects the second pressure chamber to the outlet side of the filter tank, whereby the wall the Pressing on both sides of the filter is exposed. 3. Filter device according to claim 2, characterized in that ^ that the spring (38) is connected to the wall to this in to push the filter position with a force equal to the predetermined pressure differential. 4. Filter device according to claim 2 or 3, characterized in that that the timer has a flow control device (67) in one of the lines to control the flow of liquid " or to limit gaseous medium therethrough during rewinding »and thereby the return movement the wall in the filter position to be timed. 5. Filter device according to claim 4, characterized in that that the flow control device is a pipe (67) small Q Has diameter, which extends at least over a Part of the pipe extends, and that a fine mesh sieve (63) is provided at one end of the tube to the inlet to prevent particles. 6. Filter device according to one of claims 2 to 5, characterized characterized in that the adjusting device comprises an electric motor j [M) for moving the valve when the Motor power is supplied that an electrical line extends from the motor to the switch (55- | has double-wire section (62, 63) to complete a circuit - to the motor in any position of the wall, and that a second switch (53) in the double 009847/1666 " wired section is provided adjacent to the motor and takes effect depending on the position of the valve to interrupt the circuit to the motor! when the valve reaches the backwash and filter positions. 7. Filter device according to one of claims 2 to 5, characterized in that the valve has a valve housing (120, 122, etc.) and a valve stem (5.1) extending outside the housing, that an adjusting device with a movable wall (71) is provided which is attached to the valve stem, and that chambers (74, 76) are provided on both sides of the movable wall, and that the switch is a two-position switch (80) having an inlet (81) which communicates with the pump is in operative connection to take up liquid or gaseous medium under pressure, that an outlet (82) is in operative connection with the evacuation, with first and second lines (76, 77) each of which connects the valve to one of the chambers , and there, the two position switch can be operated to selectively connect one line to the inlet and the other to the outlet to move the wall and valve stem between the filter and backwash positions n. 8. Filter device according to one of the preceding claims, characterized in that the valve is a valve housing (120, 120 ", 122, 122 ·) made entirely of plastic. BATHROOM ORIGINAL, 009847/1666 9. Filter device according to one of claims 1 to 7, characterized in that the valve has a multi-way valve structure, consisting of at least two identical plastic parts (122, 122 ¹ ), each with an elongated chamber (126, 126 ·) which extends between the ends of the part and a lateral opening (127, 127 ') which is connected between the ends of the edge, the chamber having a preselected diameter at one end, with a valve seat (128, 128') which has an opening at the other end of the plastic part is delimited and integral therewith and extends beyond the end of the plastic part, the valve seat extension having an outer diameter which approximates the diameter of the chamber at one end in order to insert another plastic part into the chamber, whereby the Plastic parts are quickly assembled at their adjacent ends to the valve seat; with identical plastic parts (120, 120 ») each with an elongated chamber (136, 136 ')» a lateral opening (137, 137') which is connected to the chamber and a valve seat (138, 138), whereby an opening is formed between their ends; each end part being constructed end-to-end with the above plastic parts and wherein the valve seats are coaxial; and with a valve seat (50, which lies coaxially in at least one section of the plastic parts and has valve elements (52, 53) thereon and thus can be operated as a function of the adjusting device, each valve element being movable between the fi ltering, whereby the flow through an outlet is blocked and the backwash position is blocked by the adjacent opening. 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