JPH09136007A - Method and device for purifying high temperature oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effect purification of high temperature oil even immediately after the use thereof by only pouring it. SOLUTION: Used high temperature oil to be purified is received in a first tank 1 and after the temperature of the oil falls below a predetermined temperature, a pump 5 is acutated to return the oil in the tank 1 to the tank 1 through a filter 7 and such operation is repeated to purify the oil, and purified oil is transferred from the tank 1 to a second tank 2 and used high temperature oil to be purified next is received in the tank 1 and thereafter the oil in the tank 2 is fed to a fryer 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cleaning used hot oil to be cleaned,
In particular, the present invention relates to a method and an apparatus for cleaning industrial oil used for cooking, for example, oil used in various deep-fried foods such as tempura for reuse.

[0002]

2. Description of the Related Art If the oil used in various deep-fried foods such as tempura becomes dirty, is it discarded and replaced with new oil?
It is generally used after being filtered manually or electrically through a single pass through a filter made of cotton cloth, wire mesh or tissue. Regarding the oil exchange timing, the standard is to decide the color or turbidity within the allowable range of acid value.

[0003]

By the way, in a store such as a Fimiley restaurant, when the closing time extends to the middle of the night, the used high temperature oil is filtered through the filter manually or electrically as described above. Even if you filter it,
The fact is that the filtration cannot be done in a long time and the filtration cannot be carried out sufficiently to withstand the reuse of the next day.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide high temperature oil immediately after use, which can be cleaned by simply pouring it. To obtain an oil cleaning method and an apparatus therefor.

[0005]

In the method for cleaning high temperature oil according to the present invention, the high temperature oil to be cleaned is received in the first tank, and when the oil temperature falls below a predetermined temperature, the pump is operated to perform the first
The oil in the tank is returned to the first tank through the filter and repeatedly circulated to clean the oil, and the cleaned oil is transferred from the first tank to the second tank, and then used high temperature to be cleaned. After receiving the oil in the first tank, the oil in the second tank is supplied to the used container.

The high temperature oil cleaning apparatus according to the present invention includes a first tank for receiving used high temperature oil to be cleaned, a second tank for transferring the cleaned oil, and a first switching valve for both tanks. And a filter connected to the discharge port of the pump via a second switching valve, and the outlet of the filter is connected to both tanks via a third switching valve. The switching valve is connected to a refueling pipe.

It is preferable that the first tank is provided with an oil temperature detector which operates a pump when the oil temperature falls below a predetermined temperature. Further, it is preferable that the first, second and third switching valves are electric three-way switching valves.

At the bottom of both tanks, a manual 3
It is preferable that a one-way switching valve is connected, and the first switching valve and the drain pipe are connected to both switching valves.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

1 to 4 are diagrams showing a piping system and a control system of a high temperature oil cleaning device (hereinafter referred to as a cleaning device).

In FIG. 1, reference numeral 1 designates a first tank for receiving used high temperature oil to be cleaned, and reference numeral 2
Designated by is a second tank to which purified oil is supplied. Ports C of the manual three-way switching valves V4 and V5 are connected to the lower portions of the first and second tanks, respectively. Ports A of the manual three-way switching valves V4 and V5 are connected to the drain pipe 3, and ports B are respectively connected to the first through the pipe lines.
It is connected to the port A or B of the electric three-way switching valve V1. The port C of the first electric three-way switching valve V1 is connected to the suction port of the pump 5 of the pump unit 4 via a pipe line. The discharge port of the pump 5 is connected to the port C of the second electric three-way switching valve V2 via a conduit.

The port A of the second electric three-way switching valve V2 is connected to a refueling pipe 6 having a nozzle at its tip via a pipe line, and the port B is connected to the inlet of the filter 7 via a pipe line. . A pressure switch 15 is attached to the conduit between the second electric three-way switching valve V2 and the filter 7. The outlet of the filter 7 is connected to the C port of the third electric three-way switching valve V3 via a conduit. Port A of the third electric three-way switching valve V3 is connected to the first tank 1 via a pipe, and port B is connected to the second tank 2 via a pipe. An oil temperature detector 8 such as a thermostat is installed in the first tank 1, and when the oil temperature in the first tank reaches a predetermined temperature, for example, 90 ° C. or less, a detection signal is issued to operate the pump 5. It is like this.

FIG. 1 shows the original positions of the piping system and the control system of the above-mentioned cleaning device, and the black coating on the three-way portions of the electric and manual three-way switching valves V1 to V5 is the same. It indicates that the oil flow in the direction is stopped. That is, in the original position, the ports A of the electric and manual three-way switching valves V1 to V5 are closed.

A fryer 9, which is a container for use, is disposed above the first tank 1, and used high temperature oil to be cleaned from the fryer 9 passes through an oil discharge valve 10, a discharge hose 11 and a my filter 12. Through the first tank 1
Is to be discharged.

FIG. 5 is a perspective view showing the outer shape of a cleaning device having the above-mentioned piping system and control system. As shown in the figure, the cleaning device is provided with a casing 14 that can travel by wheels 13, and a first tank 1 and a second tank 2 which are oil tanks are provided adjacent to each other inside the casing 14. On the upper part of the first tank 1 and the second tank 2, a my filter 12 for filtering the used high temperature oil to be cleaned from the fryer 9 and an opening / closing lid 17 can be placed. A filter 7 and an electric box 16 are arranged on the sides of the first tank 1 and the second tank 2. In a space provided below the filter 7 and the electric box 16, a pump 5, electric and manual 3-way switching valves V1 to V5, etc. are arranged. The manual three-way switching valves V4 and V5 can be easily operated from the outside by opening a door provided in the casing 14.

As described above, since the cleaning device according to the present invention is compactly housed in the casing 14 and integrated, it can be easily housed in the space below the fryer 9. Also, from the second tank 2 to the fryer 9
When supplying the cleaned oil to the casing, operating the switch of the electric box 16 or replacing the filter 7, the casing 1
By pulling the handle 18 provided on the front surface of the fryer 4, the fryer 9 can be easily pulled out from the lower side to the front side.

Next, each step of the operation of the above-mentioned cleaning device will be described with reference to FIGS. 1 and 4.

When the fryer 9 is working,
The piping system and control system of the cleaning device are in the original position shown in FIG. When the work on the fryer 9 is completed, the metal fitting of the drain hose 11 is connected to the oil drain valve 10 of the fryer 9, and the end of the drain hose 11 is connected to the first tank 1.
Set it so that it is above the My filter 12 placed on the. Next, by opening the oil discharge valve 10, the used high temperature oil to be cleaned in the fryer 9 is
It is discharged into the first tank 1 while being filtered by the my filter 12. (a) Cleaning step (see FIG. 2) The temperature of oil immediately after use is 170 ° C., for example. The oil contained in the first tank 1 is naturally cooled with the passage of time. When the oil temperature is 90 ° C. or higher, the original position shown in FIG. 1 is maintained. When the oil temperature becomes 90 ° C. or less, the electric three-way switching valve V3 is activated by the detection signal of the oil temperature detector 8 to open the port A and close the port B, and the pump 5 is activated. As a result, the oil in the first tank 1 returns to the first tank 1 via the pump 5 and the filter 7, and is repeatedly circulated to clean the oil. When the filter 7 is clogged and the pressure in the pipeline exceeds the set pressure ( ² to 5 kgf / cm ² ), the pressure switch 15 operates and the pump 5 stops and returns to the original position. (b) Transfer process (see FIG. 3) After a lapse of a certain time (for example, 8 hours) from the start of cleaning, the electric three-way switching valve V3 operates to open the port B, and the port A
The oil purified by the above-described repeated circulation of oil is transferred from the first tank 1 to the second tank 2 via the pump 5 and the filter 7. After a lapse of a certain time (for example, 15 minutes) from the start of transfer, the pump 5 is stopped. Thus, the purified oil is stored in the second tank 2. (c) Refueling process (see FIG. 4) At the start of work on the fryer 9, the operator operates the electric three-way switching valves V1 and V2 to open the port A and close the port B, which is provided at the tip of the refueling pipe 6. The nozzle 6a is hung on the fryer 9, and the pump 5 is operated to supply the cleaned oil in the second tank 2 into the fryer 9. After a lapse of a fixed time (for example, 6 minutes) from the start of refueling, the pump 5 is stopped and the electric three-way switching valves V1 and V2 are operated to return to the original position.

In the actual operation, after the transfer step, the next used high temperature oil to be cleaned is discharged to the first tank 1 and the oil supply step is started. That is, the oil supplied to the fryer 9 is the oil that was previously discharged and cleaned.

The cleaning of the first and second tanks 1 and 2 is performed by a manual three-way switching valve V connected to the lower portions of both tanks 1 and 2.
This is done after operating ports 4 and 5 to open port A and closing port B. As a result, the detergent water from both tanks 1 and 2
It is discharged by the drain pipe 3 connected to the port A.

Further, the replacement of the filtration filter incorporated in the filter 7 can be easily performed without oil in the filter 7 if no oil is present in the filter 7 if it is carried out after the transfer step and the oil supply step.

In the above-mentioned embodiment, the electric three-way switching valves V1 to V3 are applied as the first, second and third switching valves, but a manual three-way switching valve or the like may be used depending on the usage situation.

[0023]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is possible to automatically filter and purify used high temperature oil simply by pouring it in, like a family restaurant. In a place where a large amount of oil is used, manpower can be saved, and moreover, the oil can be used effectively. In addition, in a container such as a fryer, almost continuous work can be performed except for oil discharge / refueling time. Further, the cleaning liquid in the tank can be easily discharged, and the cleaning liquid can be prevented from being mixed with the oil.

[Brief description of the drawings]

FIG. 1 is a view showing original positions of a piping system and a control system of a high temperature oil cleaning device.

FIG. 2 is a diagram showing a cleaning process.

FIG. 3 is a diagram showing a transfer process.

FIG. 4 is a diagram showing a refueling process.

FIG. 5 is a perspective view showing an outer shape of a high temperature oil cleaning device.

[Explanation of symbols]

 1 1st tank 2 2nd tank 3 Drain piping 5 Pump 6 Oil supply piping 7 Filter 8 Oil temperature detector 9 Flyer (container) 14 Casing 15 Pressure switch V1 1st electric 3-way switching valve (1st switching valve) V2 2nd electric 3-way switching valve (2nd switching valve) V3 3rd electric 3-way switching valve (3rd switching valve) V4, V5 Manual 3-way switching valve

Claims (5)

[Claims] 1. The used high temperature oil to be cleaned is received in a first tank (1), and when the oil temperature falls below a predetermined temperature, a pump (5) is operated to operate the oil in the first tank (1). Is returned to the first tank (1) through the filter (7) and repeatedly circulated to clean the oil, and the cleaned oil is transferred from the first tank (1) to the second tank (2), After receiving the used high temperature oil to be cleaned in the first tank (1),
A high-temperature oil cleaning method, characterized in that the oil in the second tank (2) is supplied to the used container (9). 2. A first tank (1) for receiving used high-temperature oil to be cleaned, a second tank (2) for transferring the cleaned oil, and a first switching to both tanks (1, 2). Valve (V
1) and a filter (7) connected to the discharge port of the pump (5) via a second switching valve (V2). The filter (7) Is connected to both tanks (1, 2) via a third switching valve (V3), and a refueling pipe (6) is connected to the second switching valve (V2). High temperature oil cleaning device. 3. The first tank (1) is provided with an oil temperature detector (8) for operating a pump (5) when the oil temperature falls below a predetermined temperature. The high temperature oil cleaning device described. 4. The high temperature oil cleaning device according to claim 2, wherein the first, second and third switching valves are electric three-way switching valves (V1, V2, V3). 5. Manual three-way switching valves (V4, V5) are connected to the lower portions of both tanks (1, 2), and the first switching valve is connected to both switching valves (V4, V5). (V1)
5. The high temperature oil cleaning device according to claim 2, 3 or 4, wherein the drain pipe and the drain pipe (3) are connected.