Fryer

Abstract

To prevent deterioration and solidification of cooking oil in an oil increasing tank and an oil increasing pipe.SOLUTION: In a fryer 1, an oil increasing pipe 12 connecting an oil tank 2 and an oil increasing tank 11 is provided with an oil increasing valve 13 that is electrically opened and closed. A burner controller 55 executes automatic oil increasing control for opening the oil increasing valve 13 when main power supply is turned on at a predetermined timing, supplying a differential amount of cooking oil in the oil increasing tank 11 to the oil tank 2 via the oil increasing pipe 12, and then closing the oil increasing valve 13.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a commercial fryer that heats cooking oil in an oil tank and cooks food by placing it in the oil tank. [Background technology]

[0002] A fryer heats cooking oil contained in an oil vat to a predetermined cooking temperature using a heating means such as a burner or a pulse combustor, thereby cooking food placed in the oil vat. In particular, Patent Document 1 discloses a fryer capable of implementing two cooking modes with different oil amounts. In the first cooking mode, when the cooking oil is at a predetermined first oil amount and the food is at a predetermined first rated amount, the heating means is controlled to a predetermined first heat amount to cook the food. In the second cooking mode, when the cooking oil is at a predetermined second oil amount, which is greater than the first oil amount, and the food is at a predetermined second rated amount, which is greater than the first rated amount, the heating means is controlled to a predetermined second heat amount, which is greater than the first heat amount, to cook the food. Normally, cooking is performed in the first cooking mode, which allows the food to carry dirt generated from the cooking oil and prevent deterioration of the cooking oil. However, the first cooking mode is prone to a drop in oil temperature, making it unsuitable for continuous cooking. Therefore, when cooking a large amount of food continuously, the cooking mode can be switched to the second cooking mode to enable continuous cooking. Here, an oil booster tank is provided above the oil vat to store the difference between the first and second oil amounts of cooking oil, and switching from the first cooking mode to the second cooking mode is performed by opening a manual valve provided on the oil booster pipe connecting the oil booster tank and the oil vat, thereby supplying the difference in amount of cooking oil from the oil booster tank to the oil vat. On the other hand, to switch from the second cooking mode to the first cooking mode, the manual valve is closed, the second amount of cooking oil is discharged into the filtering tank, and the pump in the oil supply line arranged between the filtering tank and the oil booster tank is driven. Then, the filtered cooking oil is supplied to the empty oil booster tank through the oil supply line to supply the difference amount, and the first amount of cooking oil exceeding the difference amount overflows from the oil booster tank and is supplied to the oil vat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2022-133909 Summary of the Invention [Problem to be solved by the invention]

[0004] However, depending on the store, there may be a small increase in customer traffic and cooking in the second cooking mode, which uses a larger amount of oil, may not be performed for a long period of time. In this case, the remaining amount of cooking oil in the oil tank may be left unused, causing the cooking oil to deteriorate and solidify in the oil tank or oil tank pipe, making it impossible to add oil to the oil tank.

[0005] Therefore, an object of the present disclosure is to provide a fryer that can prevent deterioration and solidification of cooking oil in an oil tank and an oil pipe. [Means for solving the problem]

[0006] In order to achieve the above object, the present disclosure provides an oil tank for storing cooking oil; A heating means provided in the oil tank for heating cooking oil; a control means for controlling the heating means; an oil tank provided above the cooking oil storage section in the oil tank, capable of storing cooking oil, and connected to the oil tank via an oil tank booster pipe; A flyer comprising: The oil filler pipe is provided with an oil filler valve that is electrically opened and closed, The control means is characterized by performing automatic oil increase control by opening the oil increase valve at a predetermined timing, supplying a predetermined amount of cooking oil in the oil increase tank to the oil tank via the oil increase pipe, and then closing the oil increase valve. Another aspect of the present disclosure is the above-mentioned configuration, further comprising a main power switch for turning on power to the control means, The predetermined timing at which the automatic oil increase control is executed is immediately after the main power switch is turned on. Another aspect of the present disclosure is a cooking oil supply system in which, in the above configuration, a filtering tank is provided below the oil vat, connected to the oil vat via an oil drain pipe, and filters the cooking oil drained from the oil vat, and the oil drain pipe is provided with an oil drain valve that is electrically opened and closed, and the filtering tank and the oil booster tank are connected via an oil supply path having a pump, The control means is capable of executing a first cooking mode in which the heating means is controlled at a predetermined first heat quantity to cook the food when the cooking oil contained in the oil tank is a predetermined first oil quantity, and a second cooking mode in which the heating means is controlled at a predetermined second heat quantity that is greater than the first heat quantity to cook the food when the cooking oil is a predetermined second oil quantity that is greater than the first oil quantity, The oil tank is capable of accommodating a difference between the first oil amount and the second oil amount, and is provided with an overflow section that supplies an amount of cooking oil exceeding the difference to the oil tank, The control means, after executing the automatic oil increase control, opens the oil drain valve to drain the second amount of cooking oil in the oil tank through the oil drain pipe to the filtering tank, then closes the oil drain valve and operates the pump to supply the cooking oil drained into the filtering tank through the oil supply path to the oil increase tank, thereby storing the difference in amount of cooking oil in the oil increase tank, and supplying the first amount of cooking oil exceeding the difference in amount from the oil increase tank through the overflow section to the oil tank, and then performs automatic pump-up control to stop operation of the pump. [Effects of the Invention]

[0007] According to the present disclosure, the cooking oil in the oil tank is not left unused, so deterioration and solidification of the cooking oil in the oil tank and oil tank pipe can be effectively prevented. In addition, the control means automatically drains the cooking oil in the oil tank, so there is no need for the user to take extra time or forget to drain the cooking oil from the oil tank. According to another aspect of the present disclosure, in addition to the above effects, the predetermined timing for executing the automatic oil increase control is set to immediately after the main power switch is turned ON, thereby ensuring that the automatic oil increase control is executed before turning on the main power and using the fryer. According to another aspect of the present disclosure, in addition to the above effects, after the automatic oil increase control is executed, the cooking oil in the oil tank is filtered and supplied to the oil increase tank, the differential amount of cooking oil is stored in the oil increase tank, and an automatic pump-up control is executed to supply a first oil amount of cooking oil that exceeds the differential amount to the oil tank, so that the first oil amount of cooking oil, which is used relatively frequently, can be automatically returned to the state where it is stored in the oil tank, reducing the user's effort. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a fryer. [Figure 2] 4 is a flowchart of automatic oil increase control and automatic pump-up control. [Figure 3] An explanatory diagram showing the filtering state, where (A) shows the state in which cooking oil has been dropped into the filtering tank, and (B) shows the state in which pumped-up cooking oil has been stored in the oil storage tank. [Figure 4] (A) is an explanatory diagram showing the state after filtering is completed, and (B) is a diagram showing the state after the cooking oil in the oil tank is dropped into the oil tank. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Fig. 1 is a schematic diagram showing an example of a fryer. This fryer 1 has an oil tank 2 at the top of a vessel body (not shown). A pulse combustor 3 is provided at the bottom of this oil tank 2. The pulse combustor 3 has a combustion chamber 4 and a tail pipe 5. The pulse combustor 3 is an example of the heating means of the present disclosure. The oil vat 2 has a first cooking section 6 and a second cooking section 7. The first cooking section 6 is formed above the pulse burner 3 and is a rectangular tube with an opening area that does not change vertically. The second cooking section 7 is located above the first cooking section 6 and is formed with an inverted taper that widens in all directions as it extends upward from the top of the first cooking section 6. The cooking oil storage section extends to the top of the second cooking section 7. A first oil surface temperature sensor 8 is provided near the top surface of the first cooking section 6. A second oil surface temperature sensor 9 is provided near the top surface of the second cooking section 7. A cooking temperature sensor 10 is provided inside the oil vat 2 near the tail pipe 5 of the pulse burner 3.

[0010] An oil booster tank 11 for storing cooking oil is provided at the top of the appliance, behind the oil vat 2 (to the right in Figure 1). An oil booster pipe 12 is connected to the bottom of the oil booster tank 11, and is connected to the second cooking section 7 at the rear of the oil vat 2. An oil booster valve 13 that is electrically opened and closed is provided on the oil booster pipe 12. An overflow section 14 is provided on the front surface of the fuel tank 11. The overflow section 14 is formed by piping connected to the front surface of the fuel tank 11, a flow path formed in the vertical direction to the front surface of the fuel tank 11, etc. The upper end of the overflow section 14 is connected to an opening formed in the upper front surface of the fuel tank 11 and hangs down. The lower end of the overflow section 14 is connected to the rear inner surface of the oil tank 2. Therefore, when the cooking oil in the fuel tank 11 exceeds the lower edge of the opening, the overflowed cooking oil flows from the overflow section 14 down along the rear inner surface of the oil tank 2 and into the oil tank 2. Here, the amount of cooking oil that can be stored in the oil storage tank 11 when it is full and does not exceed the lower edge of the opening is the difference between the first amount of cooking oil specified in the first cooking mode described below and the second amount of cooking oil specified in the second cooking mode, i.e., the amount of oil added from the first amount to the second amount.

[0011] An air chamber 20 is provided outside the front side of the oil tank 2. A mixing chamber (not shown) that communicates with the combustion chamber 4 is provided within the air chamber 20. A gas conduit 21 equipped with a gas solenoid valve (not shown) is connected to the mixing chamber to supply fuel gas. An air intake pipe 22 is also connected to the mixing chamber. The air intake pipe 22 is connected to a fan (not shown) provided at the bottom of the vessel body to supply combustion air. The tail pipe 5 of the pulse combustor 3 is arranged in a serpentine shape below the oil tank 2, and then connected to an exhaust pipe 23 drawn out from the air chamber 20. The exhaust pipe 23 is arranged upward at the rear of the unit body while contacting the rear surface of the fuel tank 11, allowing the exhaust gas from combustion to be discharged. An electric heater 24 is provided from the lower surface to the peripheral surface of the oil tank 2. The electric heater 24 is an example of the heating means of the present disclosure.

[0012] A filtering tank 25 equipped with a filter at the bottom is provided at the bottom of the vessel. An oil drain pipe 26 is connected to the bottom of the oil vat 2, allowing cooking oil in the oil vat 2 to be drained via the oil drain pipe 26 into the filtering tank 25. An oil drain valve 27 that is electrically opened and closed is provided on the oil drain pipe 26. A filtering pump 30 is provided at the bottom of the vessel body. The suction side of the filtering pump 30 is connected to the bottom of the filtering tank 25 via a suction pipe 31. The filtering pump 30 is an example of a pump of the present disclosure. An oil supply pipe 32 is connected to the discharge side of the filtering pump 30. The oil supply pipe 32 is connected to the oil booster pipe 12 on the upstream side of the oil booster valve 13. The oil supply pipe 32 is provided with an oil supply valve 33 that is electrically opened and closed. The oil supply pipe 32 is an example of an oil supply path of the present disclosure.

[0013] An oil top-up tank 40 using a 18L can is provided below the oil tank 2. The oil top-up tank 40 is placed on a stand 41 attached to the vessel body. The stand 41 is provided with a heat retention heater 42 for heating the oil top-up tank 40 and a tank temperature sensor 43 for detecting the temperature of the oil top-up tank 40. The lower end of an oil addition pipe 44 is inserted into the oil addition tank 40. The upper end of the oil addition pipe 44 is connected to the oil tank 2 above the second cooking section 7. An oil addition pump 45 and an oil addition solenoid valve 46 are provided in the oil addition pipe 44 from the upstream side.

[0014] A fry controller 50 is provided on the upper front of the appliance. The fry controller 50 is equipped with an operation panel 51. The operation panel 51 has a CPU and memory connected to the CPU, and has an operation switch 52, a cooking switch (not shown), a combustion lamp, and a display. By operating each switch on the operation panel 51, it is possible to set a predetermined cooking mode and a maintenance menu, etc. A burner controller 55 is provided at the bottom of the device. The burner controller 55 has a CPU and a memory connected to the CPU, a main power switch 56, and a timer (timing function) 57. Detection signals from each sensor and switch are input to the burner controller 55. When the main power switch 56 is in the ON state, the burner controller 55 follows instructions from the fry controller 50 and controls the pulse burner 3, fan, electric heater 24, filtering pump 30, heat retention heater 42, each valve 13, 27, 33, oil addition pump 45, oil addition solenoid valve 46, etc. based on the program stored in the memory, thereby performing heating and cooking control of the food to be cooked, oil addition control, automatic oil increase control and automatic pump-up control, which will be described later.

[0015] In the fryer 1 configured as described above, the burner controller 55 is capable of executing automatic oil increase control, which supplies cooking oil from the oil increase tank 11 to the oil vat 2 when the main power is turned on, and automatic pump-up control, which temporarily drops the cooking oil from the increased oil vat 2 into the filtering tank 25, then pumps it up to the oil increase tank 11, and returns the cooking oil corresponding to the first cooking mode to the oil vat 2. Both controls will be explained below based on the flowchart in Figure 2. In step (hereinafter referred to as "S") 1, when the main power switch 56 is turned ON and the main power is turned on, the burner controller 55 opens the oil booster valve 13 in S2. Then, the cooking oil in the oil booster tank 11 is dropped into the oil tank 2 via the oil booster pipe 12. Next, in S3, it is determined whether a predetermined oil refill completion time has elapsed since the opening of the oil refill valve 13. This oil refill completion time is the time required for all of the cooking oil equivalent to the difference amount in the oil refill tank 11 to be poured into the oil vat 2, and is, for example, 30 seconds. The difference amount to be poured here is an example of the predetermined amount in the present disclosure. When it is confirmed in S3 that the oil refilling completion time has elapsed, the burner controller 55 closes the oil refilling valve 13 in S4. As a result, the oil refilling tank 11 becomes empty, and cooking oil is stored in the oil tank 2 up to the second cooking section 7, which corresponds to the second oil amount. S1 to S4 are automatic oil refilling control.

[0016] Next, the burner controller 55 opens the oil drain valve 27 in S5. Then, the cooking oil in the oil vat 2 is dropped into the filtering tank 25 via the oil drain pipe 26. Next, in S6, it is determined whether a predetermined oil drain completion time has elapsed since the opening of the oil drain valve 27. This oil drain completion time is the time required for all the cooking oil in the oil vat 2 to be dumped into the filtering tank 25, and is, for example, 5 minutes. When it is confirmed in S6 that the oil drain completion time has elapsed, the burner controller 55 closes the oil drain valve 27 in S7. As a result, as shown in Figure 3(A), the cooking oil in the oil vat 2 is dumped into the filtering tank 25, and the oil vat 2 becomes empty.

[0017] Next, in S8, the burner controller 55 activates the filtering pump 30 and opens the oil supply valve 33. Then, the cooking oil in the filtering tank 25 is sucked through the suction pipe 31 and supplied to the oil booster tank 11 via the oil supply pipe 32 and the oil booster pipe 12. This allows the cooking oil to be filtered by the filter provided on the bottom surface of the filtering tank 25. When the filtered cooking oil is supplied to the oil storage tank 11, the difference in the amount of cooking oil is stored in the oil storage tank 11, as shown in Figure 3(B), and the overflowing cooking oil flows into the oil tank 2 from the overflow section 14. Next, in S9, it is determined whether a predetermined pump-up completion time has elapsed since the start of the filtering pump 30. This pump-up completion time is the time required for all of the cooking oil in the filtering tank 25 to be supplied to the oil reservoir tank 11 and the oil tank 2, and is, for example, 10 minutes. When it is confirmed in S9 that the pump-up completion time has elapsed, the burner controller 55 stops the operation of the filtering pump 30 and closes the oil supply valve 33 in S10. As a result, as shown in Fig. 4(A), cooking oil returns to the first cooking section 6 in the oil vat 2 in an amount corresponding to the first oil amount, and an amount equal to the second oil amount is left in the oil reserve tank 11. S5 to S10 are automatic pump-up control.

[0018] To continue cooking the food, the cook turns on operation switch 52 and selects first cooking mode or second cooking mode on operation panel 51. In first cooking mode, the cooking oil in oil vat 2 is at a first oil amount, and burner controller 55 cooks the food for a first cooking time and at a first heat amount from pulse burner 3 and electric heater 24 that are preset in accordance with a first rated amount set as the amount of food to be cooked at one time. After automatic pump-up control, the oil amount is set to the first amount, so the first cooking mode can be performed as is. In the second cooking mode, the cooking oil in the oil tank 2 is at a second oil amount, the burner controller 55 is set to the amount of food to be cooked at one time, and the food is heated and cooked using a second cooking time and a second heat amount from the pulse burner 3 and the electric heater 24 that are preset corresponding to the second rated amount that is greater than the first rated amount. Therefore, when the second cooking mode is selected after the automatic pump-up control, the oil replenishing valve 13 is opened by a switching operation on the operation panel 51. Then, the cooking oil in the oil replenishing tank 11 is supplied to the upper end of the second cooking section 7 of the oil vat 2, as shown in Figure 4(B). When switching from the second cooking mode to the first cooking mode, it is necessary to perform a switching operation to leave the difference between the first and second oil amounts in the oil reserve tank 11 by filtering again.

[0019] On the other hand, during operation in the first and second cooking modes, the burner controller 55 monitors the detected temperature obtained from the tank temperature sensor 43 and controls the ON / OFF of the heat retention heater 42 so that a predetermined heat retention temperature is maintained in the oil tank 40. When the first and second oil surface temperature sensors 8, 9 detect a decrease in the amount of cooking oil required in either the first or second cooking mode, or when a predetermined number of cooking cycles is reached, the oil top-up pump 45 is driven to open the oil top-up solenoid valve 46. Then, the cooking oil liquefied in the oil top-up tank 40 is supplied directly to the oil vat 2 via the oil top-up pipe 44.

[0020] In this way, in the fryer 1 of the above configuration, the oil booster pipe 12 connecting the oil tank 2 and the oil booster tank 11 is provided with an oil booster valve 13 that is opened and closed electrically, and the burner controller 55 performs automatic oil boost control by opening the oil booster valve 13 when the main power is turned on at a predetermined timing, supplying the difference amount of cooking oil in the oil booster tank 11 to the oil tank 2 via the oil booster pipe 12, and then closing the oil booster valve 13. With this configuration, the cooking oil in the oil tank 11 will not be left unused, and deterioration and solidification of the cooking oil in the oil tank 11 and the oil pipe 12 can be effectively prevented. In addition, the burner controller 55 automatically drains the cooking oil in the oil tank 11, eliminating the need for the user to go to extra effort or the risk of forgetting to drain the cooking oil from the oil tank 11.

[0021] A main power switch 56 is provided for turning on power to the burner controller 55, and the predetermined timing for executing the automatic oil increase control is immediately after the main power switch 56 is turned on. Therefore, automatic oil increase control can be reliably performed before the main power is turned on and the fryer is used. After executing the automatic oil increase control, the burner controller 55 opens the oil drain valve 27 to drain the second amount of cooking oil in the oil tank 2 via the oil drain pipe 26 to the filtering tank 25, then closes the oil drain valve 27 and operates the filtering pump 30 to supply the cooking oil drained to the filtering tank 25 to the oil increase tank 11 via the oil supply pipe 32. In other words, the burner controller 55 stores the difference amount of cooking oil in the oil increase tank 11, and supplies the first amount of cooking oil exceeding the difference amount from the oil increase tank 11 via the overflow part 14 to the oil tank 2, and then executes the automatic pump-up control to stop the operation of the filtering pump 30. Therefore, the first amount of cooking oil, which is used relatively frequently, can be automatically returned to the state where it is stored in the oil tank 2, thereby reducing the user's hassle.

[0022] Next, modified examples of the present disclosure will be described. In the above embodiment, the timing for the automatic oil increase control is immediately after the main power switch is turned on, but the timing is not limited to this. For example, when the main power switch is turned off, the burner controller may perform the automatic oil increase control and the automatic pump-up control before turning off the power. In addition, the time for executing the automatic oil increase control may be set in advance, and the automatic oil increase control may be executed at the set time. In this case, for example, if there is a history of the user operating the operation panel to supply cooking oil from the oil increase tank to the oil vat between the previous automatic oil increase control and the next automatic oil increase control, the next automatic oil increase control may be canceled. In the above embodiment, the automatic oil increase control and the automatic pump-up control are executed consecutively, but it is also possible to execute only the automatic oil increase control at a predetermined timing, and execute the automatic pump-up control separately at a timing selected by the user or a preset timing.

[0023] The time required to determine the timing to close each valve and the timing to stop the operation of the filtering pump is not limited to the above-described form, and can be increased or decreased as appropriate. However, the timing for determining these timings is not limited to the elapse of the required time. For example, a float-type or non-contact sensor may be provided in the oil tank to detect the amount of cooking oil in the tank, thereby determining the timing for closing the oil replenishing valve and the oil supply valve and the timing for stopping the filtering pump. The same applies to the oil tank; for example, a weight scale may be provided in the filtering tank, and the timing for closing the oil drain valve may be determined when a predetermined weight is reached. In the above embodiment, the predetermined amount of cooking oil to be supplied from the oil tank to the oil tank during automatic oil increase control is the difference amount (total amount) in the oil tank, but the predetermined amount is not limited to the total amount and may be, for example, at least 1 / 2 or at least 2 / 3 of the difference amount.

[0024] The heating means is not limited to a pulse combustor, but may be a gas burner provided outside the oil tank, or may be formed solely of a pulse combustor or solely of an electric heater. The exhaust pipe does not need to contact the fuel tank. The cooking oil in the oil tank can be liquefied by connecting the exhaust pipe to the oil tank and using the exhaust heat. In this case, the heater can be omitted. However, the oil tank and oil pipe can be omitted. The present disclosure is not limited to application to a fryer that executes two cooking modes with different amounts of oil. Therefore, the capacity of the oil tank is not limited to the difference amount and can be changed as appropriate. The present disclosure is also applicable to a pressure fryer in which the opening of the oil tank is closed with a lid. [Explanation of symbols]

[0025] 1··Fryer, 2··Oil tank, 3··Pulse burner, 4··Combustion chamber, 5··Tail pipe, 6··First cooking section, 7··Second cooking section, 8··First oil level temperature sensor, 9··Second oil level temperature sensor, 10··Cooking temperature sensor, 11··Oil level tank, 12··Oil level pipe, 13··Oil level valve, 14··Overflow section, 20··Air chamber, 21··Gas pipe, 22··Air supply pipe, 23··Exhaust pipe, 24··Electric heater, 25··Filtering tank, 26··Oil drain pipe, 27··Oil drain valve, 30··Filtering pump, 32··Oil supply pipe, 33··Oil supply valve, 50··Frying controller, 51··Operation panel, 52··Operation switch, 55··Burner controller, 56··Main power switch, 57··Timer.

Claims

1. an oil tank for storing cooking oil; A heating means provided in the oil tank for heating cooking oil; a control means for controlling the heating means; an oil tank provided above the cooking oil storage section in the oil tank, capable of storing cooking oil, and connected to the oil tank via an oil tank booster pipe; A flyer comprising: The oil filler pipe is provided with an oil filler valve that is electrically opened and closed, The control means performs automatic oil increase control by opening the oil increase valve at a predetermined timing, supplying a predetermined amount of cooking oil in the oil increase tank to the oil tank through the oil increase pipe, and then closing the oil increase valve.

2. a main power switch for turning on power to the control means; 2. The fryer according to claim 1, wherein the predetermined timing at which the automatic oil increase control is executed is immediately after the main power switch is turned on.

3. A filtering tank is provided below the oil tank, and is connected to the oil tank via an oil drain pipe. The filtering tank filters the cooking oil discharged from the oil tank. The oil drain pipe is provided with an electrically operated oil drain valve. The filtering tank and the oil booster tank are connected via an oil supply path having a pump. The control means is capable of executing a first cooking mode in which the heating means is controlled at a predetermined first heat quantity to cook the food when the cooking oil contained in the oil tank is a predetermined first oil quantity, and a second cooking mode in which the heating means is controlled at a predetermined second heat quantity that is greater than the first heat quantity to cook the food when the cooking oil is a predetermined second oil quantity that is greater than the first oil quantity, The oil tank is capable of storing a difference between the first oil amount and the second oil amount, and is provided with an overflow section that supplies an amount of cooking oil exceeding the difference to the oil tank, 3. The fryer of claim 1, wherein the control means, after executing the automatic oil increase control, opens the oil drain valve to drain the second amount of cooking oil in the oil tank through the oil drain pipe to the filtering tank, then closes the oil drain valve and operates the pump to supply the cooking oil drained into the filtering tank through the oil supply path to the oil increase tank, thereby storing the difference in amount of cooking oil in the oil increase tank, and supplies the first amount of cooking oil exceeding the difference in amount from the oil increase tank through the overflow section to the oil tank, and then stops operation of the pump.

Images