JPH0256930B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a filtration device for edible oil, and more particularly to a filtration device equipped with a dual-type filtration mechanism for filtering impurities such as fried residue in edible oil. .

This type of filtration device is configured to be connected to a fryer in which edible oil is injected and heated and fried, etc., and the oil liquid flowing from the fryer is filtered and returned to the fryer.

(Prior art) When a large amount of fried food is fried in a fryer, impurities accumulate and adhere to the fried food, and the oxidation of the cooking oil progresses, resulting in a significant loss of flavor and making it unusable. Therefore, it was necessary to frequently replace the cooking oil with new one. In this case, disposal of the cooking oil and injection of new cooking oil are troublesome, and in the restaurant industry, where large amounts of fried foods are carried out, it has been desired to reduce the cost of cooking oil.

To solve this problem, a filtration tank is connected to the fryer via a suction and discharge pump, and a filter paper is placed between the inlet and outlet of the oil liquid in the filtration tank, and the oil is filtered from the fryer by the suction pump. A configuration has been proposed in which the edible oil that flows into the tank is filtered through a filter paper and then returned to the fryer using a discharge pump. This filters the cooking oil to remove impurities and prevents oxidation, but with this configuration, the filter paper gets clogged in a short period of time, making it necessary to frequently replace the filter paper in the filtration tank, which is a hassle. Moreover, since the oil temperature is high, the filtration tank also becomes high temperature, and it is necessary to wait for the tank to cool down before replacing it, which also has the disadvantage of being troublesome.

In order to eliminate this drawback, the applicant filed the prior invention in Japanese Patent Application No. 58-168218 (Japanese Unexamined Patent Publication No. 60-61015).
A filtration device as shown in FIG. 3 has been proposed. To explain this in detail, the filtration device 10 preferably includes a housing 11 surrounded by a heat insulating material, and the four corners of the boat-shaped bottom outer surface of the housing 11 are connected to an L-shaped bracket and an electrically insulating member. It is seated on a platform frame 12 whose height is adjustable. A perforated plate 14 is disposed within the housing 11 so as to extend throughout the entire horizontal direction and define a suction area 13 at the bottom of the housing 11.
Guide rollers 15 and 16 extending in the width direction are rotatably disposed near the end plate of the housing 11 at a higher level. Further, at the end of the housing 11, each set of support plates 1 is provided facing each other.
7 and 18 are fixed to each other, and a filter web 19 is wound between one support plate 17.
0 is supported. Moreover, between the other support plate 18, a guide roller 15 for unwinding from the filter roller 20,
Preferably, two sets of mutually interlocking clamping rollers 21 are pivotally supported, through which the downstream side of the filter web 19 passed between the filter web 16 and the perforated plate 14 is inserted. A presser paper roller 23 is also pivotally supported on the other support plate 18 and has a presser paper web 22 wound thereon, which is guided to the upper side of the filter web 19 via a guide roller 16 on the support plate 18 side. paper web 2
The downstream side of the filter web 19 is inserted through a pinching roller 21.

At least one of the pinching rollers 21 is directly connected to the output shaft of the motor, and the pinching rollers 21 are rotated in conjunction with each other to release the filter web 19 and the presser web 22 in response to the driving force of the motor. As the roller 21 rotates, the filter web 19 of the filter roller 20 and the presser paper web 22 of the presser paper roller 23 can be unwound.

A discharge port 24 is provided at the bottom of the housing 11 and communicates with the suction area 13 , and this discharge port 24 communicates with the suction port of a pump 26 operated by a drive motor 25 . The housing 11 is connected to the fryer so that the oil in the fryer can be introduced thereto, and the outlet of the pump 26 is connected to the fryer so that the oil can be returned to the fryer. A pressure switch 27 is installed at the suction port of the pump 26, and this pressure switch 27 is turned on when the filter web 19 is clogged with impurities beyond a predetermined level and the pressure at the suction port of the pump 26 increases. A motor directly connected to the pinching roller 21 is activated. As a result, the pinching roller 21 is rotated and the filter web 19 and presser paper web 22 are rotated.
A transfer operation is performed, in which the used filter web section located on the perforated plate 14 is moved and a new filter web section is placed on the perforated plate 14.

If the drive motor 25 is continuously driven to circulate the oil through the inside of the housing 11, the suction area 13, the discharge port 24, the pump 26, the fryer, and the inside of the housing 11, impurities such as fried dregs generated inside the fryer can be removed. is captured by the filter web 19, and only the oil liquid is returned to the fryer, thereby preventing oxidation of the oil liquid. In this case, especially the perforated plate 1
When the used filter web section located on top of the filter web section 4 becomes clogged, a new filter web section can be placed in place without the conventional replacement operation, which greatly simplifies the filtration work.

(Problems to be Solved by the Invention) The filtration device shown in FIG. When the filtration device becomes clogged and is moved, there is a problem in that the circulation of oil between the filtration device and the fryer is reduced.

Therefore, the present invention solves the above problems and provides a dual-type filtration mechanism that can circulate oil between the filtration device and the fryer at substantially the same speed at all times, and can constantly perform the filtration action. The purpose is to provide a filtration device equipped with the following.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes a filter housing in which a first filtration mechanism and a second filtration mechanism are arranged in parallel. Each of the filtration mechanisms includes a perforated plate disposed in the filtration housing to partition a suction area and through which oil can pass, a filter web partially movable along the perforated plate, and a filter web moving device. , an outlet for leading out the oil liquid to the outside of the filter housing through the suction area, and an outlet port located above each perforated plate of the first and second filtration mechanisms to introduce the oil liquid into the filter housing. A filtration device is provided, in which an inlet is provided, and each outlet of the first and second filtration mechanisms is communicated with a pump for oil circulation.

(Function) Therefore, in the filtration device equipped with the dual type filtration mechanism according to the present invention, the filtration operation can be performed continuously without replacing the filtration member, and the first and second filtration mechanisms can be operated continuously. Since they can operate alternately, there is no reduction in the oil circulation speed.
A constant filtration operation can be realized.

(Example) Referring to FIG. 1 and FIG. 2, in the same figures, the component numbers used in FIG. 3 are 100
In addition, the second set of two identical members in FIG. 1 is shown with a suffix a added to the member number with 100 added.

This filtration device 110 includes a filtration housing 111
The filter housing 111 includes filter mechanisms 130 and 130a arranged in parallel. The main structure of each filtration mechanism 130, 130a is substantially the same as that of the prior invention shown in FIG. 3, so it is not shown in detail.
Support plates 11 each forming a set are erected at the ends of 11.
7, 117a, 118, 118a, and a filter web 11 is disposed between each pair of support plates 117, 117a located on one end side of the filter housing 111.
9,119a is installed. In addition, each set of support plate 11 located on the other end side of the filter housing 111
8, 118a each filter web 119, 11
Two sets of pinching rollers 121, 121a are vertically arranged in parallel and are inserted through the downstream side of the paper 9a, and presser paper webs 122, 122a are attached thereto. The holding paper webs 122, 122a are guided above the filter webs 119, 119a, respectively, and are inserted through the pinching rollers 121, 121a together with the filter webs 119, 119a. In each of the pinching rollers 121 or 121a group, the output shaft of the motor 131, 131a is directly connected to one roller of one set, and the sets are provided so as to be interlocked with each other via, for example, an endless belt. The filter mechanisms 130, 130a are in contact with each other so that they can interlock with each other, and when one roller is rotated by the motor 131 or 131a, each filter mechanism 130, 130a group moves downstream of the filter webs 119, 119a and the presser paper webs 122, 122a. Rotated to release.

In addition, in each filtration mechanism 130, 130a, the guide rollers 15, 1 of the filter web shown in FIG.
6. The structure of the perforated plate 14 and the suction area 13 defined by the perforated plate 14 is similarly adopted, and in this case, the guide roller, the perforated plate, and the suction area are provided so as to span both filtration areas, that is, as shown in the figure. It is preferable to provide the filter housing 111 so as to extend across the entire width direction of the filter housing 111 in order to reduce the number of parts.

On the other hand, one side of the filter housing 111 is provided with an inlet 133 that communicates via an inflow duct 132 with a fryer for frying various kinds of fried foods. In addition, an oil outlet 13 is provided at a location corresponding to the first filtration mechanism 130 in the terminal on the filter web 119, 119a side of the filtration housing 111.
4, and an outlet 135 for the second filtration mechanism 130a is provided on the lower side of the filter web 119, 119a side of the filtration housing 111. Both outflow ports 134 and 135 are connected to the suction duct 13
6, 137 to the suction portions 138, 138a of the pump 126 driven by a motor. Pressure switches 139, 139a are attached to the suction parts 138, 138a of the pump 126, and the pressure switches 139, 139a are connected to a control panel 140, and in this case, pressure is supplied to a control circuit (not shown) of the control panel 140. switch 139,139
Motors 131 and 131a are provided to drive the pinching rollers 121 and 121a through a control circuit, such as a relay, when an input is received from a, respectively. Furthermore, the suction part 13 of the pump 126
8, 138a is equipped with an actuator 141, 141a having a valve body such as a butterfly valve, and when receiving an output signal from a pressure switch 139, 139a, the attituator 141, 141a is actuated via a control panel 140, Suction part 1
38 or 138a is provided so as to be closable by a valve body.

Also, the filter web 1 of the filter housing 111
An endless strainer 142 is rotatably disposed between both sides of the filter housing 111 on the 19, 119a side. The endless strainer 142 is the first filtration mechanism 1 of the filtration housing 111.
A guide roller 143 on the lower side of the 30 side, a guy roller 144 on the upper side of the same side, and a second filtration mechanism 13
A drive roller 146 pivotally supported outside the filter housing 111 by a support plate 145 fixed to the upper edge of the side on the 0a side, and a guide roller 147 on the lower side of the same side.
Guided by. The output shaft of a motor 148 is connected to the drive roller 146.
When the drive roller 146 is rotated by the rotation force, the endless strainer 142 is rotated continuously while being close to both sides of the filter housing 111 and above the filter webs 119, 119a. be done. In this case, another guide roller is inserted between the drive roller 146 and the lower guide roller 147 on the side of the second filtering mechanism 130a, so that the same side surface of the filter housing 111 and the endless strainer 142 are brought into direct contact. It is also possible to avoid this and reduce the load applied when the endless strainer 142 rotates. Furthermore, the endless strainer 142 has a width larger than the oil inlet 133 provided on the side of the filter housing 111 on the first filter mechanism 130 side, and
1 so as to cover the inlet 133 from the inner surface of the oil inlet 133, thereby trapping relatively large impurities such as fried dregs in the oil flowing into the inlet 133. When the impurities captured in the endless strainer 142 are bent with a small curvature around the drive roller 146, the endless strainer 1
It can fall from 42. At this time, if necessary, a scraper that contacts the endless strainer 142 may be provided near the drive roller 146.

Furthermore, the operation of the filtration device equipped with a dual-type filtration mechanism according to the present invention will be summarized and explained. At present, the actuator 141 located at one suction section 138 of the pump 126 is in an inactive state and is open, while the actuator 141a located at the other suction section 138a is in an operating state and closed. is assumed to be running continuously. The oil flowing from the inlet 133 first captures large fried debris in the oil by the endless strainer 142 that covers the inlet 133, and then flows into the filter housing 111. At this time, the oil liquid is sucked by the pump 126 toward the opened suction part 138, so the oil liquid passes through the filter web 119 of the first filtration mechanism 130, the perforated plate, the suction area, and the suction duct 136, and then enters the pump 126. Inflow. Fine impurities in the oil that has passed through the endless strainer 142 while passing through the filter web 119 are removed, and oxidation of the oil is sufficiently reduced.
The oil flowing into the pump 126 flows into the fryer (not shown) from the outlet (not shown) of the pump 126, and thus flows between the fryer and the filter housing 1.
11, impurities in the oil are removed and oxidation thereof is effectively reduced.

When the filter web 119 of the first filtration mechanism 130 becomes clogged and the pressure reaches the suction section 138 of the pump 126, the pressure switch 139 is activated and the motor 131 is driven. As a result, the pinching roller 12
1 is rotated, and a tensile force is applied to the filter web 119 and the presser paper web 122, so that they are unwound, and the used portion of the filter web 119 is moved from above the perforated plate and the suction area, and the filter web 119 is unrolled. A new part is placed on the perforated plate as well as on the suction area. Further, impurities are deposited on the used portion of the filter web 119, but since the holding paper web 122 is positioned on the upper side when the filter web 119 is released from the sandwiching roller 121, the impurities on the filter web 119 are not scattered. can be suppressed. On the other hand, when the motor 131 of the first filtering mechanism 130 is driven, the actuator 1
41 is also in an operating state, the valve is opened and the suction portion 138 is closed. When the actuator 141 is activated, the other actuator 141a is turned off via the control circuit of the control panel 140, and the other suction portion 138a is opened. As a result, the oil that has passed through the endless strainer 142 is sucked toward the opened suction portion 138a, and the first filter mechanism 1
30, the second filtration mechanism 130a is operated, and therefore, while the pump 126 is circulating the oil, the first and second filtration mechanisms 1
30 and 130a can be operated alternately, so that the oil can be circulated at substantially the same speed at all times, and the oil can be filtered without interruption.

(Effects of the Invention) According to the filtration device equipped with a dual-type filtration mechanism according to the present invention configured as described above, the function of the device is improved when the filter web becomes clogged, unlike a filtration device equipped with a single filtration mechanism. To achieve such effects that the oil liquid can be circulated at the same speed at all times without causing a decrease in performance or stoppage of the equipment, the oil liquid can be filtered without interruption, and the reliability of the equipment can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a simplified plan view of a filtration device equipped with a dual-type filtration mechanism according to the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a side view of a conventional filtration device. 110...filtration device, 111...filtration housing,
117, 117a, 118, 118a... base plate,
119, 119a...filter web, 121, 1
21a... pinching roller, 122, 122a... presser paper web, 130... first filtration mechanism, 130a... second
Filtration mechanism, 131, 131a...Motor, 132...
Inflow duct, 133...Inflow port, 134, 135...
Outlet, 136, 137...Suction duct, 138,
138a... Suction part, 139, 139a... Pressure switch, 140... Control panel, 141, 141a... Actuator, 142... Endless strainer, 1
43, 144...Guide roller, 145...Support plate,
146... Drive roller, 147... Guide roller, 1
48...Motor.

Claims (1)

[Scope of Claims] 1. A filtration mechanism housing is provided in which a first filtration mechanism and a second filtration mechanism are arranged in parallel;
Each of the filtration mechanisms includes a filter web, a part of which is movable along a perforated plate disposed in the filtration housing to define a suction area, a filter web movement device, and a filter web that moves outside the filtration housing through the suction area. The filtration housing includes an outlet for introducing the oil liquid, and an inlet for introducing the oil liquid is provided in the filtration housing and is located above each perforated plate of the first and second filtration mechanisms. A filtration device equipped with a dual-type filtration mechanism in which each outlet of the filtration mechanism is provided so as to be able to communicate alternately with a pump for circulating oil liquid. 2. The filter web transfer device includes a pinch roller that is attached to one end of the filter housing and that passes through the filter web, and a guide roller that is located above the holes, and a pinch roller that is attached to the other end of the filter housing. 2. The filtration device according to claim 1, further comprising a presser paper web guided above the filter web in the vicinity of the roller. 3 A filter housing is provided with a first filtration mechanism and a second filtration mechanism arranged in parallel, and each of the first and second filtration mechanisms has a perforated plate disposed in the filtration housing to define a suction area. The filter housing includes a filter web, a part of which is movable, a filter web moving device, and an outlet for leading the oil liquid out of the filter housing through the suction area, and the filter housing includes first and second filters. It is equipped with an inlet for introducing oil liquid located above each perforated plate of the mechanism.
Dual type filtration in which the outlet ports of the first and second filtration mechanisms are provided so as to communicate alternately with the oil circulation pump, and a strainer is provided at the inlet of the filtration housing to cover the inlet. A filtration device with a mechanism. 4 The strainer is an endless strainer,
The filtration device according to claim 3, wherein the filtration device is guided by guide rollers in the filtration housing and is movable from a position above the filter web toward the inlet. 5. The filtration device according to claim 4, wherein the endless strainer is disposed outside the filtration housing and stretched around a drive roller rotated by a motor. 6 Each outlet of the first and second filtration mechanisms is communicated with each suction part of one pump via a suction duct, respectively,
4. The filtration device according to claim 3, wherein each suction portion is provided with an actuator having a valve body that is closed by a pressure switch that is activated when the pressure increases.