JP2003071209A - Sealed filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealed filter capable of efficiently filtering a liquid to be filtered across the overall length of a pipe for a long time and achieving a satisfactory deodorizing process. SOLUTION: A roll filter 6 obtained by winding a sheet-like filter medium so that a center through hole 6a is opened, is housed in a case 1 with an inflow aperture 3 and an outflow aperture 4 opened at the bottom part 2a and the upper end sealed by an attachable/detachable lid 5 in such a way that the outer peripheral face of the filter 6 comes into contact with the inner periphery of the case 1. Further, a jet pipe 7 with the lower end 7a connected to the inflow aperture 3 and the upper end 7b protruded from the center through hole 6a to spew the liquid to be filtered, fed under pressure, is installed in the center of the case 1. In addition, a colliding plate 8 is fitted, in the axial direction, to the inner face of a lid 5 through a bolt 18 in such a way that the position of the plate 8 is adjustable. Thus, the liquid to be filtered which is spewed, is dispersed almost uniformly over the upper end face 66 of the roll filter 6 by the collision between the colliding plate 8 and the spewed liquid. Besides, an annular fixed plate 10 is attached to the colliding plate 8 through a fitting bar 9 and the roll filter 6 is fixed by blocking the upper end of the center through hole 6a by the help of the fixed plate 10. A deodorizing filter 12 is provided between the lower face 6c of the roll filter 6 and the bottom part 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention efficiently and satisfactorily filters liquids containing fine dust and foreign particles such as used cutting oil, tempura oil, fish culture water, fermented liquor raw materials and muddy water, rainwater. The present invention relates to a sealed filter device.

[0002]

2. Description of the Related Art Conventionally, as a filtering device of this type, there is one described in, for example, JP-A-8-107830. The filtering device described in this publication generally introduces a liquid to be filtered from an inlet on the upper side of a pressure cooker containing a dedicated filter, and removes dust and foreign particles filtered through the filter from the pressure cooker. It is taken out from the outlet at the bottom of the, and adopts the element filter system that has been conventionally used for filtering engine oil of automobiles.

[0003]

However, in the above-mentioned conventional filtration device, the element filter system is adopted and the liquid to be filtered is injected into one side of the filter at a constant flow rate of about 40 cc / cm ^2. Therefore, there is a problem that fine dust particles and foreign particles such as oxidized tempura powder and dust that have been filtered out are concentrated on one side of the filter, and the filter is clogged after a short period of time from the start of use.

Therefore, an object of the present invention is to devise a structure so that the liquid to be filtered is evenly distributed to the inflow side of the filter, so that the liquid to be filtered can be efficiently filtered over a long period of time. And to provide a filtration system using the same.

[0005]

In order to achieve the above object, the hermetically-sealed filtration device of the present invention has a cylindrical case having an inflow port and an outflow port for the liquid to be filtered at the bottom, and is attached to and detached from the upper end of the case. A lid that can be attached to seal the inside of the case,
A roll filter that is wound around a sheet-shaped filter material so as to have a through hole, and the outer peripheral surface is in contact with the inner circumference of the case and is housed in this case, and the lower end is connected to the inflow port and the upper end is connected. Is provided in the case by protruding from the upper end of the through hole of the roll filter, and is attached to the inner surface of the lid so as to adjust the position in the axial direction of the case, and the ejection pipe for ejecting the liquid to be filtered sent under pressure. A collision plate that disperses the liquid to be filtered jetted out substantially evenly on the upper end surface of the roll filter by a collision, and is attached to the collision plate at a distance via a mounting member and is also inserted into the ejection pipe. And an annular fixing plate for fixing the roll filter.

In the above-mentioned hermetically-sealed filter device, a roll filter formed by winding a sheet-shaped filter medium is housed in a case which has an inflow port and an outflow port at the bottom and is sealed at the upper end with a removable lid. The upper end of the ejection pipe, the lower end of which is connected to the inflow port, projects from the upper end of the center through hole of the roll filter, and is mounted above the upper end of the ejection pipe on the inner surface of the lid so as to be positionally adjustable in the axial direction of the case. The collision plate is disposed, and an annular fixing plate attached to the collision plate via a mounting member surrounds the upper end of the ejection pipe and fixes the upper end of the roll filter. Therefore, the liquid to be filtered that has been pressure-fed is ejected from the upper end of the ejection pipe toward the collision plate,
It collides with this collision plate and is dispersed substantially evenly toward the upper end surface of the lower roll filter. The dispersed liquid to be filtered is
As the dust and foreign particles contained therein are filtered off as they flow axially downward in the roll filter, they pass through the outlet at the bottom of the case from the lower end surface of the roll filter and flow out as a clean liquid. The liquid to be filtered ejected at a predetermined pressure from the upper end of the ejection pipe collides with the upper collision plate and is dispersed substantially evenly on the upper end surface of the roll filter, so that the dust is concentrated on a specific portion of the roll filter. Since the clogging does not occur in a short period of time, the liquid to be filtered can be efficiently filtered over a long period of time.

In one embodiment of the present invention, a disc-shaped deodorizing filter is provided between the lower surface of the roll filter and the bottom surface of the case.

In this embodiment, since the deodorizing filter is provided between the lower surface of the roll filter and the bottom surface of the case, the filtered liquid filtered by the roll filter can be effectively deodorized. Compared with the case where the odorant is impregnated, the liquid to be filtered such as edible oil after use can be more strongly deodorized.

In one embodiment of the present invention, the deodorizing filter is further provided with a connecting pipe arranged so as to surround the injection pipe, the upper end of which is fitted to the lower face of the fixing plate, and the lower end of which has a screw. Has a screw screwed into a screw at the lower end of the connecting pipe and a hole communicating with the connecting pipe at substantially the center, and holds the roll filter between the fixing plate and the fixing plate. There is.

In this embodiment, the upper end of the connecting pipe is fitted to the lower surface of the fixing plate, the lower end of the connecting pipe communicates with the hole in the substantially center of the deodorizing filter, and the screw at the lower end of the connecting pipe is the deodorizing filter. The roll filter is sandwiched between the fixing plate and the deodorizing filter and held by being screwed into the screw. Therefore, the fixed plate attached to the inside of the lid via the collision plate is attached to the case, and when taken out from the case, the deodorant filter and the roll filter are attached together with the fixed plate via the connecting pipe, Since it can be taken out, the roll filter and the deodorizing filter can be easily attached, and even when the roll filter is in close contact with the case due to the temperature of the liquid to be filtered or the jet pressure, it can be easily and surely removed.

The filtration system of the present invention comprises one or more of the above-mentioned sealed filtration devices, a pump having a discharge pipe connected to the inflow port, a temperature sensor for detecting the temperature of the liquid to be filtered, and the pressure of the liquid to be filtered. When at least one of the pressure sensor for detecting the, the input device for inputting the set value, the liquid to be filtered becomes abnormally high temperature or high pressure based on the detection signal of the at least one sensor, A control device for issuing an alarm and stopping the pump is provided.

In the above-mentioned filtration system, the liquid to be filtered is pressure-fed by the pump to the jet pipe of one or more hermetically-sealed filtration devices, and at least one of the temperature and the pressure of the liquid to be filtered is detected by the temperature sensor or the pressure sensor. The detection signals of these sensors are compared with the upper limit value input from the input device, and if the comparison result is abnormally high temperature or high pressure, the control device issues an alarm and stops the pump. In other words, if the liquid to be filtered becomes abnormally high temperature or high pressure due to clogging of the roll filter or other causes, the user who knows the abnormality by the alarm can immediately take measures and the filtration system is forcibly stopped. As a result, the danger can be prevented and a plurality of sealed filtration devices can be centrally controlled by one control device.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a vertical cross-sectional view showing an embodiment of the hermetically sealed filtration device of the present invention. The hermetically-sealed filtration device 1 includes a cylindrical case 2 having an inflow port 3 and an outflow port 4 for the liquid to be filtered at the center and the periphery of the bottom part 2a, respectively.
A lid 5 that is detachably attached to the upper end 2b of the above and seals the inside of the case, and a sheet-shaped filtering material is wound so as to have a central through hole 6a, and the outer peripheral surface is in contact with the inner circumference of the case. The roll filter 6 housed in 1 (see FIG. 5 (A)), the lower end 7a is connected to the inflow port 3, and the upper end 7b is projected from the upper end of the central through hole 6a so as to be on the central axis of the case 1. The extending jet pipe 7 is provided. In addition, as the material of the roll filter 6, cellulose fibers mainly composed of wood pulp or those in which synthetic fibers are mixed at an appropriate ratio are used.
Recycled paper, waste paper, toilet paper, etc. can be used depending on the liquid to be filtered. Further, the low filter adopts a general JIS standard dimension in order to reduce the manufacturing cost, and is wound up by tight winding.

Further, the hermetically-sealed filtration device 1 is fixed to the tip of a bolt screwed to the center of the inner surface of the lid 5, and the liquid to be filtered ejected from the upper end 7b of the ejection pipe collides with the upper end surface of the roll filter 6. 6b and a collision plate 8 to be dispersed substantially evenly, and the collision plate 8 is mounted via a mounting rod 9 with a space therebetween, and the upper end 7b of the ejection pipe 7 is inserted into the central hole 10a to lower the outer periphery 10b. Roll filter 6
An annular fixing plate 10 fitted to the center core 11 and fixing the upper end of the roll filter 6 by bringing the large-diameter flange portion 10c into contact with the upper end face 6b of the roll filter, and the lower end surface 6c of the roll filter 6. A disk-shaped deodorizing filter 12 is provided between the bottom surfaces of the case 2.

As shown in the top view of FIG. 4, the lid 5 has a T-shaped handle 13 projecting from the center of the outer surface, and the outer periphery of the lid 5 is laterally aligned with the chamfered portion 2c at the outer periphery of the upper end of the case. It is a chamfered portion 5a forming a V-shaped wedge, and the wedge has a clamp 14 composed of a pair of semi-annular rings, one end of which is connected by a hinge 15 and the other end of which is tightened by a wing bolt 16 (FIG. 4). (Refer to FIG. 3), it is tightened from the outside and has a so-called pressure cooker structure in which it is brought into close contact with the case 1 through the O ring 19.

The bolt 17 having the collision plate 8 fixed to the lower end is
According to the height of the collision plate 8 and the fixed plate 10 depending on the height of the roll filter, the locking nut 18 screwed into the female screw hole of the handle 13 and screwed to the inner surface side of the lid 5 is temporarily loosened and is moved forward and backward by rotation. Position can be adjusted. On the other hand, the fixed plate 1
An O-ring 20 is mounted on the inner surface of the center hole 10a of 0, the lower end surface of the collar portion 10c, and the lower outer peripheral surface adjacent to this. Thus, when the case 1 is sealed with the lid 5, the fixing plate 10
Seals the center through hole 6a of the roll filter and the outer periphery of the ejection pipe 7 in a liquid-tight manner to prevent the liquid to be filtered from leaking into the center through hole 6a and prevent the roll filter 6 from being deformed. The roll filter 6 is easily taken out when the lid 5 is removed.

The deodorizing filter 12 is formed by forming a stainless steel wire mesh into a disk-shaped cage, and activated clay, activated carbon,
It is filled with small particles or powder such as tourmaline so that it can sufficiently withstand the pressing force applied from the fixing plate 10 when fixing the roll filter 6. On the outside of the deodorizing filter 12, a partition cylinder 21 whose upper and lower surfaces are opened with a slight gap from the inner surface of the case 1 is arranged so that its upper end bites into the lower surface 6c of the roll filter 6, and Through the use of the period, the flow of the unfiltered liquid to be filtered toward the outflow port 4 is blocked through a gap that may be formed between the outer circumference of the roll filter 6 and the inner circumference of the case 1.

A lower end 7a of the jet pipe 7 penetrates the inflow port 3 in a liquid-tight manner and projects downward, and a discharge pipe 25 of a pump 24 is connected to the lower end 7a via a nipple 22. The liquid to be filtered sucked from the strainer 26 through the suction pipe 23 is pressure-fed to the ejection pipe 7 at a pressure of about 1 kgf / cm ^{2 as} indicated by an arrow in the figure.

The operation of the hermetically-sealed filtration device having the above structure will be described below. When the pump 24 is started, the liquid to be filtered in a tank (not shown) is sucked through the strainer 26 and the suction pipe 23, and is pressure-fed to the ejection pipe 7 through the discharge pipe 25 as shown by an arrow in FIG. The liquid to be filtered sent under pressure is
It is ejected from the upper end 7b of the ejection pipe 7 extending on the central axis of the case 1, hits the upper collision plate 8 and goes radially downward, and is dispersed substantially evenly on the upper end surface 6b of the roll filter 6. The dispersed liquid to be filtered flows down in the roll filter 6, and the dust and foreign particles contained therein are filtered off by the roll filter 6 as it flows down, and the lower end surface 6c of the roll filter 6c.
Comes out as a clean liquid. The jetted liquid to be filtered is substantially evenly dispersed on the upper end surface 6b of the roll filter by the collision plate 8 and flows down in the roll filter 6 thoroughly, so that dust and foreign particles can be identified by the filter like a conventional filtering device. It is possible to efficiently filter the liquid to be filtered over a long-term pipe without concentrating on a location and causing clogging in a short period of time.

A fixed plate 1 having a plurality of O-rings 20
The position of 0 is adjusted by advancing and retracting the bolt 17, and when the case 1 is sealed by the lid 5, the core 11 of the roll filter 6 is
Also, since the deodorizing filter 12 that fits into the ejection pipe 7 is sandwiched and pressed against the case bottom portion 2a to seal the upper end opening of the core 11, the liquid to be filtered ejected from the ejection pipe 7 is The roll filter 6 is prevented from deforming during use without leaking into the core 11, and in addition, the upper edge of the partition cylinder 21 arranged outside the deodorant filter 12 is
Since it penetrates into the lower end surface 6c of the roll filter and blocks the flow of unfiltered liquid through the gap that may occur between the outer periphery of the roll filter and the inner periphery of the case 1, clean liquid containing no dust or the like is discharged from the outlet 4. Can be drained.

The clean liquid flowing out from the lower end surface 6c of the roll filter is then deodorized by the deodorant filter 12 as shown by the arrow.
Enter the activated clay, which is a functional foreign substance filled in the basket,
It is deodorized by activated carbon and tourmaline and becomes a liquid having no offensive odor and flows out from the outlet 4. The deodorant filter 12
Is different from the conventional example in which the roll filter is impregnated with the deodorant, and is provided separately from the roll filter 6,
For example, the deodorant can be easily replaced according to the use of the liquid to be filtered such as edible oil or fish culture water, and the liquid to be filtered can be more strongly deodorized as compared with the conventional example.
The deodorizing filter 12 is suitable for use with tempura oil, which tends to generate an odor due to oil dregs, changes in oil components, or oxidation due to heating.

The liquid to be filtered is 100 to 1 such as tempura oil.
At a relatively high temperature of 50 ° C., the impinging plate 8 prevents the jetted liquid from directly hitting the case 1, and the impinging plate 8 has a heat radiation effect, so that the user may get burned even if the user touches the case 1. There is no. Furthermore, since a small-diameter pipe is used as the ejection pipe 7, the cross-sectional area of the roll filter can be increased and the filtration efficiency can be increased.

FIG. 2 shows a cross section of a hermetically-sealed filter device similar to that of FIG. 1 using a roll filter 27 shorter than the roll filter 6 of FIG. 1. The same members as those of FIG. 1 are designated by the same reference numerals. And the description is omitted. The roll filter 27 is
As shown in the perspective view of FIG. 5 (B), a cylindrical pedestal made by winding a sheet made of cellulose fiber or the like around the core 28 and placed on the partition cylinder 21 in the case 1 for height adjustment. Support disk 30 having a large number of water drain holes 29
It is placed and stored in. The upper edge of the partition cylinder 21 is shown in FIG.
Similarly to the above, the lower end surface of the pedestal 29 is bitten, and the outer peripheral edge of the support disk 30 bites into the lower surface of the roll filter 27 to flow down a gap that may occur between the inner circumference of the case and the outer circumference of the roll filter. It is designed to prevent the unfiltered liquid from flowing out. The height of the pedestal 29 is set so that when the case 1 is sealed by the lid 5, the fixed plate 10 is hermetically fitted in the upper end opening of the core 28.

The above-mentioned hermetic filter is also a roll filter 2
7 has the same structure as the device of FIG. 1 except that it is short,
It operates in the same manner as described with reference to FIG. 1 and has the same effect.

FIG. 3 shows the core 1 of the roll filter 6 of FIG.
1 shows a cross section of a hermetic filter similar to that of FIG. 1, which uses a roll filter 31 without 1, and the same members as those in FIG. As shown in the perspective view of FIG. 5 (C), the roll filter 31 is made by winding a sheet made of cellulose fiber or the like so as to have a central through hole 31a having an inner diameter that fits tightly into the ejection pipe 7.
It is accommodated in the case 1 as shown in FIG. Fixed plate 32
Is shorter than the fixing plate 10 of FIGS. 1 and 2, and has a center hole 32a.
The O-rings 20 are fitted on the inner circumference and the lower end surface 32b,
When the case 1 is sealed by the lid 5, the fixing plate 32 presses the center of the upper end surface 31b of the roll filter,
The outer periphery of the ejection pipe 7 and the center through hole 31 of the roll filter 31
The unfiltered liquid is prevented from leaking into the gap that may occur between the inner periphery of a and the inner periphery.

The above-mentioned hermetic filter is also a roll filter 3
1 has the same structure as that of the apparatus shown in FIG. 1 except that it has no core, and therefore operates in the same manner as described with reference to FIG. 1 and has the same effect. In addition, in this hermetic filter, since the central through hole 31a of the roll filter 31 is fitted to the ejection pipe 7, the cross-sectional area of the roll filter can be increased as compared with the embodiments of FIGS. The filtration efficiency can be further increased. In the above embodiments, the case where the object of filtration is a liquid has been described, but the sealed filtration device of the present invention can also be used for purification of moist air containing exhaust gas.

FIG. 6 is a schematic block diagram showing an example of the filtration system of the present invention using the sealed filtration device of FIGS. This filtration system comprises a hermetically-sealed filtration device 1 and a discharge pipe 2 of a pump for pumping a liquid to be filtered to a jet pipe 7 of the device.
5, the temperature sensor 34 and the pressure sensor 35 are provided.
And a control circuit 33. The control circuit 33 is
A sensor amplifier 36 for amplifying detection signals from the temperature / pressure sensors 34, 35, an A / D converter 37 for converting the output of the sensor amplifier 36 into a digital signal, and an input for inputting an upper limit temperature and an upper limit pressure. A keyboard 41 as a device, temperature and pressure alarms 39 and 40 that emit an alarm or light when the temperature or pressure of the liquid to be filtered is abnormal, and a signal to be filtered represented by a signal input from the A / D converter 37. Control for comparing the temperature and pressure of the liquid with the upper limit temperature and upper limit pressure input from the keyboard, and activating the temperature or pressure alarms 39 and 40 and stopping the pump 24 when the former exceeds the latter. Computer 38 as a device
And a peripheral interface 43 that transmits and receives signals to and from an externally connected device, and an external controller 42 that controls the transmission and reception of signals between the peripheral interface 43 and the keyboard 41 and the computer 38.

The above filtration system operates as follows. When the liquid to be filtered supplied by the pump 24 is being filtered by the hermetically-sealed filtration device 1, the temperature or pressure of the liquid to be filtered in the discharge pipe 25 may change due to clogging of the roll filter 6 or other causes. When the upper limit value set in step 2 is exceeded, the computer 38 comparing the detection signal input through the sensor amplifier 36 and the A / D converter 37 with the upper limit value determines that the temperature is abnormally high or abnormally high. , The temperature alarm 39 or the pressure alarm 40 is activated, and the pump 2
Emergency stop 4 Then, the user who knows the abnormality by the alarm issued by the temperature alarm 39 or the pressure alarm 40 can immediately check the defective part of the filtration system and take a countermeasure. In addition, the accident caused by the continued operation of the pump 24
It will be prevented by the emergency stop.

In the above embodiment, the case where the computer 38 controls a single hermetically-sealed filter device has been described.
The computer 38, based on the detection signals from the temperature sensor and the pressure sensor provided in the plurality of sealed filtration devices,
Similarly, it can be configured to activate the alarm of the abnormal sealed filter device and stop the pump. Therefore, according to such a configuration, a plurality of sealed filtration devices can be centrally controlled by one computer, and it is necessary to constantly treat a large amount of liquid to be filtered such as waste water in a hotel or engine oil in an automobile repair shop. It is suitable to use when there is.

FIG. 7 is a vertical cross-sectional view showing another embodiment of the hermetically sealed filter of the present invention.
It has the same structure as the hermetic filter of FIG. 1 except that the fixing plate 10 and the deodorizing filter 12 are connected by a connecting pipe 44, and the same members as those in FIG. The connecting pipe 44 has a diameter larger than that of the injection pipe 7,
The upper end 44a is fitted in the central hole 10c on the bottom surface of the fixed plate 10, while the lower end has a male screw 44b (see FIG. 8A). Deodorant filter 1
2 is a large-diameter hole having an internal thread 12a which is screwed into the external thread 44b of the connecting pipe 44 and which is connected to the lower side of the hole,
It has a small-diameter hole 12b (see FIG. 8A) through which the ejection pipe 7 is densely inserted, in the center.

FIG. 8 shows the operation of the hermetically-sealed filtration device having the above structure.
The following will be described with reference to (A) and (B). As shown in FIG. 8A, the upper end 44a of the connecting pipe 44 is fitted into the central hole 10d of the bottom surface of the fixed plate 10 attached to the inner surface of the lid 5 via the bolt 17, the collision plate 8 and the mounting rod 9. Then, the roll filter 6 is inserted from the lower end of the connecting pipe 44, and as shown in FIG.
After fitting the lower outer periphery 10b of the roll filter 6 and bringing the upper end surface 6b of the roll filter 6 into contact with the collar portion 10c of the fixing plate 10, the male screw 44b protruding from the lower end of the roll filter 6 is attached to the central hole of the deodorizing filter 12. 8B, the roll filter 6 is sandwiched and held between the fixing plate 10 and the deodorant filter 12, and the lid 5, the roll filter 6 and the deodorant filter 12 are held. Integrate 12
Next, the integrated roll filter 6 and deodorant filter 1
2 is inserted from the upper end opening of the case 2, and the ejection pipe 7 protruding in the center of the case 2 is attached to the small diameter hole 12 of the deodorant filter 12.
When the upper end opening of the case 2 is sealed with the lid 5 and the clamp 14 through b and the central hole 10a of the fixing plate 10, the mounting of the roll filter 6 and the deodorizing filter 12 is completed (see FIG. 7).
Therefore, this hermetic filter has an advantage that the roll filter 6 and the deodorizing filter 12 can be easily attached at the same time when the lid 5 is attached.

When it becomes necessary to remove the roll filter 6 due to clogging or the like, the clamp 14 is removed, and the lid 5 is pulled up by the handle 13. Then, the roll filter 6 and the deodorizing filter 12 integrated with the lid 5 are also pulled up together and pulled out above the case 2. Therefore, there is an advantage that the roll filter 6 can be easily and surely removed even when the roll filter 6 comes into close contact with the case 2 due to a high temperature or a high jet pressure of the liquid to be filtered during operation. In the above embodiment, the male screw 44b is provided on the outer periphery of the lower end of the connecting pipe 44 and the female screw 12b is provided at the center of the deodorizing filter 12, but it is also possible to provide the connecting pipe with a female screw and the deodorizing filter with a male screw. is there.

[0033]

As is apparent from the above description, the hermetic filter of the present invention has a sheet-like structure in a case having an inlet and an outlet at the bottom and having an upper end sealed with a removable lid. A roll filter formed by winding a filter material is housed, and the upper end of the ejection pipe whose lower end is connected to the inflow port is projected from the upper end of the center through hole of the roll filter, above the upper end of the ejection pipe, and above the lid. A collision plate is mounted on the inner surface of the case so that its position can be adjusted in the axial direction of the case, and an annular fixing plate is attached to this collision plate via a mounting member, and the fixing plate surrounds the upper end of the ejection pipe and rolls. Since the upper end of the filter is fixed, the liquid to be filtered can be made to collide with the impingement plate and disperse almost evenly on the upper end face of the roll filter, so dust can concentrate on a specific location on the roll filter for a short period of time. Cause clogging Succoth no, it can be filtered efficiently over a long period of time the liquid to be filtered.

In one embodiment of the hermetic filter of the present invention, since the deodorizing filter is provided between the lower surface of the roll filter and the bottom surface of the case, the filtered liquid filtered by the roll filter is effectively eliminated. Since it is possible to smell, the liquid to be filtered such as edible oil after use can be more strongly deodorized as compared with the case where the roll filter is impregnated with a deodorant.

In one embodiment of the hermetic filter of the present invention, the upper end of the connecting pipe is fitted to the lower surface of the fixing plate, the lower end of the connecting pipe communicates with the hole at the substantially center of the deodorizing filter, and the connecting pipe is connected. The screw at the lower end of the deodorant filter is screwed into the screw of the deodorant filter, and the roll filter is sandwiched and held between the fixing plate and the deodorant filter, so the deodorant filter and roll filter are fixed via the connecting pipe. Since it can be attached and taken out together with the plate, it is easy to attach the roll filter and deodorant filter, and even if the roll filter comes into close contact with the case due to the temperature of the liquid to be filtered or the ejection pressure, it is easy and reliable. It can be removed.

In the filtration system of the present invention, the liquid to be filtered is pressure-fed by the pump to the ejection pipe of one or more hermetically-sealed filtration devices, and at least one of the temperature and the pressure of the liquid to be filtered is a temperature sensor or a pressure sensor. The detection signals of these sensors are compared with the upper limit value input from the input device, and if the comparison result is abnormally high temperature or high pressure, the control device issues an alarm and stops the pump, so an alarm is issued. The user who knows the abnormality can immediately take countermeasures, and the filtration system is forcibly stopped, so that the danger can be prevented and the plurality of sealed filtration devices can be centrally controlled by one control device. It will be possible.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a sealed filtration device of the present invention.

2 is a vertical cross-sectional view of a hermetically-sealed filter device in which the roll filter is shorter than that of FIG.

FIG. 3 is a vertical cross-sectional view of a hermetically sealed filter having a roll filter without the core of the roll filter of FIG.

4 is a top view of the hermetic filter of FIG. 1. FIG.

FIG. 5 is a perspective view showing various roll filters.

FIG. 6 is a schematic block diagram showing an example of the filtration system of the present invention using the sealed filtration device of FIGS.

FIG. 7 is a vertical cross-sectional view showing another embodiment of the hermetically sealed filtration device of the present invention.

FIG. 8 is an exploded perspective view showing a main part of the hermetically-sealed filtration device of FIG. 7 and a perspective view in an assembled state.

[Explanation of symbols]

1 Sealed filter 2 cases 3 Inlet 4 Outlet 5 lid 6 roll filter 7 Spout pipe 8 collision plate 10 Fixed plate 11 core 12 Deodorant filter 12a female screw 12b small hole 14 Clamp 17 Volts 24 pumps 25 discharge pipe 33 Control circuit 34 Temperature sensor 35 Pressure sensor 38 Computer 39 Temperature alarm 40 pressure alarm 41 keyboard 44 Connection pipe 44b male screw

Claims (4)

[Claims] 1. A cylindrical case having an inlet and an outlet for a liquid to be filtered at the bottom, a lid detachably attached to the upper end of the case to seal the inside of the case, and a sheet-shaped filter material as a center. The roll filter is wound so that it has a through hole, and the outer peripheral surface is in contact with the inner circumference of the case and is housed in this case.The lower end is connected to the inlet, and the upper end is the through hole of the roll filter. And a spouting pipe that is provided in the case so as to project from the upper end of the spout and spouts the liquid to be filtered that is pressure-fed, and is attached to the inner surface of the lid so as to be positionally adjustable in the axial direction of the case. A collision plate that disperses liquid substantially evenly on the upper end surface of the roll filter by collision, and is attached to the collision plate with a space therebetween via a mounting member, and is inserted into the ejection pipe, and the roll filter Sealing filtration apparatus characterized by comprising a fixed annular fixing plate. 2. The hermetic filter according to claim 1, further comprising a disc-shaped deodorizing filter provided between a lower surface of the roll filter and a bottom surface of the case. 3. The hermetic filter according to claim 2, further comprising a connecting pipe arranged so as to surround the injection pipe, the upper end of which is fitted to the lower surface of the fixed plate, and the outer periphery of the lower end having a screw. The deodorizing filter has a screw screwed into a screw at the lower end of the connecting pipe and a hole communicating with the connecting pipe at substantially the center, and the roll filter is sandwiched between the fixing plate and the fixing plate. A hermetically sealed filtration device, characterized in that it is adapted to hold. 4. The one or more hermetically sealed filtration devices according to claim 1, a pump having a discharge pipe connected to the inflow port, and a temperature for detecting the temperature of the liquid to be filtered. At least one of a sensor and a pressure sensor for detecting the pressure of the liquid to be filtered, an input device for inputting a set value, and an abnormally high temperature of the liquid to be filtered based on a detection signal of the at least one sensor. Alternatively, when the pressure becomes high, an alarm is issued and a control device for stopping the pump is provided.