Flyer

Abstract

To enable preferable heating and cooking of an object to be cooked irrespective of timing of loading two baskets.SOLUTION: A flyer includes a burner controller that, when receiving a cooking start command after a first basket is loaded, controls a pulse combustor on the basis of a first control line L1; and, when receiving a cooking start command after a second basket is loaded subsequent to loading of the first basket, compares the first control line L1 related to the first basket with a second control line L2 related to the second basket, sets a synthesized control line L3 that is synthesized so as to keep temperature of cooking oil always on a higher side and controls the pulse combustor on the basis of the synthesized control line L3.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] The fryer heats cooking oil contained in an oil vat to a predetermined cooking temperature using heating means such as a burner or a pulse burner, thereby cooking foods such as potatoes placed in the oil vat. The food to be cooked is stored in a basket, and the basket is placed in the oil vat for cooking. As disclosed in Patent Document 1, there is known an oil vat in which two baskets containing food to be cooked can be placed side by side and simultaneously placed in the oil vat. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5340962 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional fryers such as that described in Patent Document 1, the controller controls the heating means so that the cooking oil temperature (target temperature) changes based on a curved or stepped control line that increases and decreases with time from the start of cooking. However, since the second basket is often not inserted at the same time as the first basket but after the first basket is inserted, if the target temperature is low on the control line of the first basket when the second basket is inserted, the cooking oil temperature will drop significantly. As a result, the cooking oil temperature will not be able to return to the target temperature, which may result in poor cooking.

[0005] Therefore, an object of the present disclosure is to provide a fryer that can heat and cook food appropriately regardless of the timing of inserting two baskets. [Means for solving the problem]

[0006] In order to achieve the above object, the present disclosure provides an oil tank that contains cooking oil and can accommodate two baskets in which a predetermined standard amount of food to be cooked is stored; A heating means provided in the oil tank for heating cooking oil; A control means for controlling the heating means; An operation means for issuing a cooking start command to the control means, The control means controls the heating means when the basket is put into the oil vat and a cooking start command is received from the operation means, so that cooking is completed within a predetermined cooking time while the temperature of the cooking oil changes based on a predetermined control line, When the first basket is inserted and the cooking start command is received, the control means controls the heating means based on the control line, When the second basket is inserted with a delay after the first basket is inserted and the cooking start command is received, a composite control line is set by comparing the first control line related to the first basket with the second control line related to the second basket so that the temperature of the cooking oil is always on the higher side, and the heating means is controlled based on the composite control line. Another aspect of the present disclosure is characterized in that, in the above configuration, the control means, in control based on the composite control line, terminates cooking of the first basket upon the lapse of the cooking time related to the first control line, and thereafter controls the heating means based on the second control line. Effect of the Invention

[0007] According to the present disclosure, since the heating means is controlled by the composite control line, even if the two baskets are inserted at different times, the temperature of the cooking oil does not drop significantly. Therefore, the food to be cooked can be cooked appropriately regardless of the timing of inserting the two baskets. According to another aspect of the present disclosure, in addition to the above effects, excessive heat is not applied when cooking the second basket alone. [Brief description of the drawings]

[0008] [Figure 1] FIG. [Diagram 2] FIG. 1 is a schematic diagram of a fryer. [Diagram 3] FIG. 4 is an explanatory diagram of a control line. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a perspective view showing an example of a fryer, and Fig. 2 is a schematic diagram of the fryer. This fryer 1 is provided with a pair of left and right oil vats 3, 3 in the upper part of a vessel body 2. A pair of left and right pulse combustors 4, 4 serving as heating means is provided at the bottom of each oil vat 3. Each pulse combustor 4 has a combustion chamber 5 provided on the inner wall at the front of the oil vat 3, and a tail pipe 6 connected to the combustion chamber 5 and routed in a serpentine manner within the oil vat 3. Since the configurations of the oil tanks 3 and their combustion and exhaust systems are the same on the left and right, the following description will mainly focus on the oil tank 3 on the left side of FIG.

[0010] The oil vat 3 has a first cooking section 7 and a second cooking section 8. The first cooking section 7 is formed above the pulse burner 4, and is a square tube with an opening area that does not change in the vertical direction. The second cooking section 8 is located above the first cooking section 7, and is formed in an inverted taper shape that widens in all directions as it moves upward from the top end of the first cooking section 7. The section up to the top end of the second cooking section 8 serves as a storage section for cooking oil. Two baskets 9 containing food to be cooked, such as potatoes, can be placed side by side in the oil vat 3. A net 10 for receiving the baskets 9 is provided above the pulse burners 4, 4. A first oil surface temperature sensor 11 is provided near the upper end surface of the first cooking section 7. A second oil surface temperature sensor 12 is provided near the upper end surface of the second cooking section 8. A cooking temperature sensor 13 is provided in the oil vat 3 near the tail pipe 6 of the pulse burner 4.

[0011] An oil booster tank 14 for storing cooking oil is provided at the top of the vessel 2 behind the oil vat 3. An oil booster pipe 15 that is connected to the second cooking section 8 at the rear of the oil vat 3 is connected to the bottom of the oil booster tank 14. An oil booster valve 16 that can be opened and closed manually is provided on the oil booster pipe 15. An oil booster temperature sensor 17 for detecting the temperature of the cooking oil stored in the oil booster tank 14 is provided inside the oil booster tank 14. An overflow section 18 is provided on the front surface of the fuel tank 14. The overflow section 18 is formed by a pipe connected to the front surface of the fuel tank 14, a flow path formed in the vertical direction to the front surface of the fuel tank 14, etc. The upper end of the overflow section 18 is connected to an opening formed in the upper front surface of the fuel tank 14 and hangs down, and the lower end of the overflow section 18 is connected to the rear inner surface of the oil tank 3 via an outlet 19. Therefore, when the cooking oil in the fuel tank 14 exceeds the lower edge of the opening, the overflowed cooking oil flows from the outlet 19 down along the rear inner surface of the oil tank 3 into the oil tank 3.

[0012] An air chamber 20 is provided on the outside of the front side of the oil tank 3. A mixing chamber (not shown) communicating with the combustion chamber 5 is provided inside the air chamber 20. A gas conduit 21 equipped with a gas solenoid valve 22 is connected to the mixing chamber to supply fuel gas. An air supply pipe 23 is also connected to the mixing chamber. The air supply pipe 23 is connected to a fan 24 provided at the bottom of the vessel body 2 to supply combustion air. The tail pipes 6, 6 of the pulse combustors 4, 4 are arranged in a serpentine shape below the oil tank 3, and then connected to exhaust pipes 25, 25 drawn out from the air chamber 20. These exhaust pipes 25, 25 have mufflers 26, 26 arranged at the rear of the vessel body 2. The mufflers 26, 26 are arranged facing upward while in contact with the rear surface of the fuel tank 14, and are capable of discharging the combustion exhaust gas. The fuel tank 14 and the mufflers 26, 26 are covered by an exhaust pipe cover 27 provided on the body 2. A protective cover 28 is provided on the front of the left and right exhaust pipe covers 27, 27. Basket hangers 29, 29 for suspending and supporting the baskets 9, 9 are fixed to the protective cover 28. The outlet 19 of the overflow section 18 is provided below the basket hanger 29.

[0013] A filtering tank 30 with a filter at the bottom is provided at the bottom of the vessel 2. An oil drain pipe 31 is connected to the bottom of the oil vat 3, and cooking oil in the oil vat 3 can be drained through the oil drain pipe 31 to the filtering tank 30. The oil drain pipe 31 is provided with an oil drain valve 32 that can be opened manually. A filtering pump 35 is provided at the bottom of the vessel body 2. The suction side of the filtering pump 35 is connected to the bottom of the filtering tank 30 via a suction pipe 36. The discharge side of the filtering pump 35 branches into a first oil supply pipe 37 and a second oil supply pipe 38. The first oil supply pipe 37 is connected to the oil booster pipe 15 on the upstream side of the oil booster valve 16. The first oil supply pipe 37 is provided with a first oil supply valve 39 that is manually opened and closed. The second oil supply pipe 38 is connected to the lower part of the oil tank 3. The second oil supply pipe 38 is provided with a second oil supply valve 40 that can be opened and closed manually.

[0014] An oil tank 45 using a 18L can is provided below the oil tank 3. The oil tank 45 is placed on a stand 46 provided on the vessel body 2. The stand 46 is provided with a heater 47 for heating the oil tank 45 and a tank temperature sensor 48 for detecting the temperature of the oil tank 45. The lower end of an oil addition pipe 49 is inserted into the oil addition tank 45. The upper end of the oil addition pipe 49 is connected to the oil tank 3 above the second cooking section 8. An oil addition pump 50 and an oil addition solenoid valve 51 are provided in the oil addition pipe 49 from the upstream side.

[0015] A fry controller 60 is provided on the upper front surface of the body 2. The fry controller 60 includes an operation panel 61. The operation panel 61 allows the setting of a predetermined cooking mode and a maintenance menu, etc. A burner controller 62 is provided at the bottom of the appliance body 2. The burner controller 62 controls the ON / OFF of the pulse burner 4 according to the cooking mode instructed by the fry controller 60, and cooks food such as potatoes. Detection signals from the first and second oil surface temperature sensors 11, 12, the cooking temperature sensor 13, the oil top-up temperature sensor 17, the tank temperature sensor 48, etc. are input to the burner controller 62. Based on these detection signals and instructions from the operation panel 61, the burner controller 62 controls the pulse burner 4, the gas solenoid valve 22, the fan 24, the filtering pump 35, the heat retention heater 47, the oil top-up pump 50, the oil top-up solenoid valve 51, etc.

[0016] In the fryer 1 configured as above, when the oil tank 3 is filled with cooking oil up to the first cooking section 7 or the second cooking section 8, the user turns on the operation switch of the operation panel 61. The burner controller 62 rotates the fan 24 for a predetermined time to supply air, and then intermittently burns the mixed gas in the combustion chamber 5 to turn the pulse burner 4 on and off. That is, the mixed gas is ignited in the combustion chamber 5 to cause it to explode and burn in the combustion chamber 5, and the combustion exhaust is forcibly discharged to the tail pipe 6 due to the increase in pressure in the combustion chamber 5 caused by the combustion. Then, fuel gas and combustion air are sucked into the combustion chamber 5, which is under negative pressure due to the discharge of the combustion exhaust. This on and off operation is repeated to heat the cooking oil stored in the oil tank 3. Next, burner controller 62 monitors the detected temperature obtained from cooking temperature sensor 13, and when it confirms that the temperature of the cooking oil has reached a predetermined cooking temperature (for example, 180 to 182°C), fry controller 60 issues a notification, such as by outputting a display that indicates cooking is OK on operation panel 41. When this notification is issued, the cook places a first basket 9 (hereinafter, to distinguish between them, the first basket will be referred to as "9A" and the second basket as "9B") containing foods to be cooked such as potatoes that make up the predetermined standard amount for first cooking section 7 or second cooking section 8 into oil vat 3, and presses the cooking start button.

[0017] 3, the burner controller 62 is set with a control line L indicated by a dotted line, starting from the cooking time t=0 when the cooking start command is received. Therefore, when the cooking start button is pressed, the burner controller 62 controls the combustion of the pulse burner 4 so that the temperature (target temperature) of the cooking oil changes based on this control line L. This control line L is controlled so that the target temperature gradually drops after the basket 9 is inserted, and then rises at the same gradient to return to the target temperature at the start of cooking, and is maintained at that temperature until a predetermined cooking time has elapsed. When two baskets 9A, 9B are loaded in succession, control is performed by the control line L (called the "first control line L1" to distinguish it from the first basket 9A) when the first basket 9A is loaded. Then, when the second basket 9B is loaded at a timing delayed from the first basket 9A (t1 in FIG. 3), the control line L shown by the dashed dotted line (called the "second control line L2" to distinguish it from the first basket 9B) is set. However, because the target temperature has already shifted to the low temperature range by the first control line L1, the addition of the second control line L2 at this point will cause the target temperature to drop again. Therefore, there is a risk that the temperature of the cooking oil will drop significantly and will not be able to return to the target temperature.

[0018] Therefore, here, a composite control line L3 shown by a solid line is set. This is a control line that is composited so that the control line L with the higher temperature is always selected in comparison with the first control line L1 and the second control line L2. According to this composite control line L3, even if the second basket 9B is added late and the target temperature is about to drop on the second control line L2, the gradient of the composite control line L3 switches to the rising gradient of the first control line L1 at the point (t2) where the composite control line L3 intersects with the first control line L1. Therefore, the target temperature does not drop significantly. When the cooking time of the first control line L1 expires at t3, the fry controller 60 sounds an alarm to notify the completion of cooking of the first basket 9A. Then, the cook removes the first basket 9A from the oil vat 3. Thereafter, the second basket 9B continues to be controlled based on the second control line L2. When the cooking time of the second control line L2 expires at t4, the fry controller 60 sounds an alarm to notify the completion of cooking of the second basket 9B. Therefore, the operator lifts the second basket 9B out of the oil vat 3.

[0019] On the other hand, during cooking, the burner controller 62 monitors the detected temperature obtained from the tank temperature sensor 48, and controls the ON / OFF of the warming heater 47 so that a predetermined warming temperature is maintained in the top-up oil tank 45. When the first and second oil surface temperature sensors 11, 12 detect a decrease in the required cooking oil or a predetermined number of cooking times is reached, the oil top-up pump 50 is driven to open the oil top-up solenoid valve 51. Then, the cooking oil liquefied in the oil top-up tank 45 is directly supplied to the oil vat 3 via the oil top-up pipe 49. Cooking oil can also be supplied from the oil booster tank 14 at a timing specified by the user. In this case, the user opens the oil booster valve 16 of the oil booster pipe 15 while closing the first oil supply valve 39 of the first oil supply pipe 37. Then, the cooking oil in the oil booster tank 14 is supplied to the oil tank 3 via the oil booster pipe 15. Closing the oil booster valve 16 stops the supply of cooking oil.

[0020] The fryer 1 of the above embodiment includes an oil vat 3 that contains cooking oil and can accommodate two baskets 9A, 9B in which a predetermined standard amount of food to be cooked is stored, a pulse burner 4 (heating means) that is provided in the oil vat 3 and heats the cooking oil, a burner controller 62 (control means) that controls the pulse burner 4, and an operation panel 61 (operation means) that issues a cooking start command to the burner controller 62. When the basket 9 is placed in the oil vat 3 and a cooking start command is received from the operation panel 61, the burner controller 62 controls the pulse burner 4 so that the temperature of the cooking oil changes based on a predetermined control line L and cooking ends within a predetermined cooking time. When the burner controller 62 receives a cooking start command after the first basket 9A is inserted, it controls the pulse combustor 4 based on the first control line L1, and when the burner controller 62 receives a cooking start command after the second basket 9B is inserted with a delay after the first basket 9A is inserted, it sets a composite control line L3 that combines the first control line L1 for the first basket 9A and the second control line L2 for the second basket 9B so that the cooking oil temperature is always on the higher side, and controls the pulse combustor 4 based on the composite control line L3. With this configuration, even if the two baskets 9A, 9B are inserted at different times, the temperature of the cooking oil does not drop significantly. Therefore, the food to be cooked can be cooked appropriately regardless of the timing of inserting the two baskets 9A, 9B.

[0021] In particular, here, in control based on the composite control line L3, the burner controller 62 terminates cooking of the first basket 9A upon the lapse of the cooking time related to the first control line L1, and thereafter controls the pulse burner 4 based on the second control line L2. Therefore, when cooking is performed solely in the second basket 9B, excessive heat is not applied.

[0022] The following describes a modified example. The control line is not limited to one in which the target temperature changes in a curved manner, but may be one in which the target temperature changes in a stepwise manner, or may be one that includes both a curved and stepwise manner. In the above embodiment, the composite control line is set when the second basket is added, but after the second basket is added, the first control line and the second control line may be compared at predetermined intervals, and the higher target temperature may be selected each time. In the above embodiment, the synthesis control line is set and the heating means is controlled regardless of the timing of when the second basket is added, but a time limit (e.g., 30 seconds) may be set between the addition of the first basket and the addition of the second basket, and if the time limit is exceeded, an alarm or the like may be sounded to stop the addition of the second basket. The heating means is not limited to the pulse combustor, and may be a gas burner provided outside the oil tank. The heating means may be an electric heater, or may be used in combination with a gas burner or a pulse combustor. In the above embodiment, a pair of oil tanks are provided on the left and right sides, but the number of oil tanks may be one, or conversely, three or more. 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]

[0023] Reference Signs List 1·· Fryer, 2·· Vessel body, 3·· Oil tank, 4·· Pulse burner, 5·· Combustion chamber, 6·· Tail pipe, 7·· First cooking section, 8·· Second cooking section, 9 (9A, 9B)·· Basket, 11·· First oil level temperature sensor, 12·· Second oil level temperature sensor, 14·· Oil reserve tank, 22·· Gas solenoid valve, 30·· Filtering tank, 60·· Frying controller, 61·· Operation panel, 62·· Burner controller, L1·· First control line, L2·· Second control line, L3·· Combined control line.

Claims

1. An oil tank that contains cooking oil and can accommodate two baskets in which a specified amount of food to be cooked can be stored; A heating means provided in the oil tank for heating cooking oil; A control means for controlling the heating means; An operation means for issuing a cooking start command to the control means, The control means controls the heating means when the basket is put into the oil vat and a cooking start command is received from the operation means, so that cooking is completed within a predetermined cooking time while the temperature of the cooking oil changes based on a predetermined control line, When the first basket is inserted and the cooking start command is received, the control means controls the heating means based on the control line, This fryer is characterized in that when a second basket is inserted with a delay after the first basket is inserted and the cooking start command is received, a composite control line is set by comparing the first control line related to the first basket with the second control line related to the second basket so that the temperature of the cooking oil is always on the higher side, and the heating means is controlled based on the composite control line.

2. The fryer according to claim 1, characterized in that, in the control based on the composite control line, the control means terminates cooking of the first basket when the cooking time related to the first control line has elapsed, and thereafter controls the heating means based on the second control line.

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