Flyer

Abstract

To prevent a cooking oil from reversely flowing from an oil tank side to an additional oil tank side.SOLUTION: A fryer 1 includes: an oil tank 4 which is held inside a device body 2 to store a prescribed amount of a cooking oil and which has a front wall 27 extending to a front as the same goes upward; a pulse combustor which heats the cooking oil inside the oil tank 4; an eighteen liter can for storing the cooking oil; and an additional oil pipe 43 which connects the eighteen liter can and the oil tank 4. Then, there is provided an additional oil port 35 in which the additional oil pipe 43 is connected to the front wall 27 of the oil tank 4. Also, the additional oil port 35 is arranged in an upper side from an oil level position L where a prescribed quantity (a second oil quantity) of the cooking oil is supplied to the oil tank 4.SELECTED DRAWING: Figure 6

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] A 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 food placed in the oil vat. As the cooking time and frequency of cooking increases, the amount of impurities that accumulate in the cooking oil increases, causing the oil to deteriorate and lowering cooking quality. Also, the amount of cooking oil decreases as the oil is absorbed by the food being cooked. Therefore, when using a fryer, it becomes necessary to filter the cooking oil periodically depending on the cooking time and frequency, and to replenish it with new cooking oil (additional oil). Therefore, Patent Document 1 discloses a fryer in which an oil tank is connected to an oil supply pipe (oil top-up pipe) that is connected to the discharge side of a pump, and a suction pipe that joins a pipe extending from a replenishment one-gallon can (oil top-up tank) and a pipe extending from a filtering tank is connected to the suction side of the pump. With this fryer, when the cooking oil in the oil tank decreases, new cooking oil can be replenished from the one-gallon can, and when impurities increase in the oil tank, the cooking oil drained from the oil tank to the filtering tank can be filtered and returned to the oil tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-119995 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the fryer of Patent Document 1, depending on the position of the oil supply pipe connected to the oil tank, there was a risk that the cooking oil in the oil tank would flow back up the oil supply pipe and into the piping on the 18L can side. There was also a risk that cooking oil would flow back from the piping extending from the filtering tank and into the piping on the 18L can side.

[0005] Therefore, the present disclosure aims to provide a fryer that can prevent cooking oil from flowing back from the oil tank to the top-up oil tank, even when an oil top-up pipe for replenishing new cooking oil from the top-up oil tank is connected to the oil tank. [Means for solving the problem]

[0006] In order to achieve the above object, the present disclosure provides an oil tank that is supported within a container body to accommodate a predetermined amount of cooking oil and has a sloping front wall that extends forward as it goes upward; A heating means for heating the cooking oil in the oil tank; A top-up oil tank for storing cooking oil; A fryer comprising an oil supply pipe connecting the oil supply tank and the oil tank, The oil tank is characterized in that an oil addition port to which the oil addition pipe is connected is provided on the front wall of the oil tank, and the oil addition port is positioned above the oil level when the specified amount of cooking oil is supplied to the oil tank. Another aspect of the present disclosure is characterized in that, in the above configuration, the oil addition port is cylindrical and protrudes from the front wall and opens rearward. Another aspect of the present disclosure is characterized in that, in the above configuration, the container body is provided with a cover that covers the oil addition port from above. Another aspect of the present disclosure is characterized in that, in the above configuration, the oil tank is provided with a frame-shaped oil tank cover that covers the periphery of the oil tank from above, and the cover is provided integrally with the oil tank cover. Another aspect of the present disclosure is a cooking oil supply system for cooking oil tanks, comprising: a filtering tank for filtering the cooking oil in the oil tank; and an oil supply pipe for returning the cooking oil filtered in the filtering tank to the oil tank. The fuel supply pipe is connected to the rear of the oil tank. Effect of the Invention

[0007] According to the present disclosure, since the oil refill port is located above the cooking oil level, the cooking oil in the oil vat can be prevented from entering the oil refill pipe. Therefore, even if an oil refill pipe for refilling new cooking oil from the oil refill tank is connected to the oil vat, the cooking oil can be prevented from flowing back from the oil vat to the oil refill tank. In addition, since the cooking oil supplied from the oil refill port flows gently into the oil vat along the front wall, splashing of cooking oil is less likely to occur when adding oil. According to another aspect of the present disclosure, in addition to the above effects, the oil refill port is cylindrical and protrudes from the front wall and opens backward, so the opening area can be made smaller than when an outlet is provided on the front wall, thereby further reducing the possibility of cooking oil flowing back from the oil refill port. According to another aspect of the present disclosure, in addition to the above effects, the container is provided with a cover that covers the oil refill port from above, so that the oil refill port can be hidden. This eliminates the risk of a basket or the like coming into contact with the oil refill port and damaging it when the food to be cooked is placed in the oil vat. According to another aspect of the present disclosure, in addition to the above effects, a filtering tank that filters the cooking oil in the oil vat and an oil supply pipe that returns the cooking oil filtered in the filtering tank to the oil vat are provided, and since the oil supply pipe is connected to the rear of the oil vat, the connection port of the oil supply pipe and the oil refill port can be positioned in the oil vat with a large distance between them in the front and rear directions. This prevents the filtered cooking oil from flowing around the oil refill port, further reducing the risk of the cooking oil flowing back to the oil refill pipe. [Brief description of the drawings]

[0008] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a side view of the fryer. [Figure 4] FIG. [Diagram 5] FIG. 2 is an exploded perspective view of the upper part of the fryer with the oil tank cover removed. [Figure 6] FIG. 5 is an enlarged view of an oil supply port portion taken along line AA in FIG. 4 . [Figure 7] FIG. 2 is a perspective view of the fryer omitting the fry controller, the oil tank cover, etc. [Figure 8] FIG. 13 is an exploded perspective view of the upper part of a modified fryer with the oil tank cover removed. [Figure 9] FIG. 13 is a front view of a modified example of a fryer in which the fry controller and the oil tank cover are omitted. [Figure 10] FIG. 13 is a perspective view of a modified fryer in which the fry controller and the oil tank cover are omitted. 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, Fig. 2 is a front view of the fryer, Fig. 3 is a side view of the fryer, and Fig. 4 is a plan view of the fryer. The fryer 1 has a square box-shaped body 2 formed by attaching an outer plate (not shown) to a frame 3. A pair of left and right oil tanks 4, 4 are provided in the upper part of the body 2. A plurality of casters 5, 5... are provided on the underside of the body 2. The configuration of the fryer 1 is approximately the same for both the left and right oil vats 4, and therefore the left oil vat 4 will be mainly described unless otherwise specified. In addition, when distinguishing between the left and right components, the right side will be denoted by reference characters A and the left side by reference characters B (for example, in the case of oil vats 4, the right side will be oil vat 4A and the left side will be oil vat 4B). A pair of left and right pulse combustors 6, 6 serving as combustion means are provided at the bottom of the oil vat 4. Each pulse combustor 6 is equipped with a combustion chamber 7 and a tail pipe 8. A mesh body 9 is provided above the pulse combustors 6, 6 in the oil vat 4.

[0010] An air chamber 10 is provided on the outside of the front side of the oil vat 4. A mixing chamber (not shown) communicating with the combustion chamber 7 is provided inside the air chamber 10. A gas conduit 11 equipped with a gas solenoid valve 12 is connected to the mixing chamber to supply fuel gas. In addition, the mixing chamber is connected to an air supply pipe 13. The air supply pipe 13 is connected to a fan 14 provided at the rear bottom of the body 2, and supplies air for combustion. The tail pipes 8, 8 of the pulse combustors 6, 6 are arranged in a serpentine shape below the oil vat 4, and then connected to a pair of left and right exhaust pipes 15, 15 drawn out from the air chamber 10 outside the oil vat 4. The exhaust pipes 15, 15 are routed to the rear of the vessel body 2, and then extend upward behind the oil vat 4, enabling the exhaust of combustion to be discharged. As shown in Fig. 5, cylindrical mufflers 16, 16 are provided at the upward downstream ends of the exhaust pipes 15, 15. The upper parts of the mufflers 16, 16 are covered from above by an exhaust pipe cover 17, and the upper ends of the exhaust pipes 15, 15 protrude into an exhaust adapter 18.

[0011] An oil reserve tank 20 (FIG. 5) for replenishing cooking oil to the oil vat 4 is housed in front of the mufflers 16, 16 inside the exhaust pipe cover 17. The mufflers 16, 16 are in contact with the rear surface of the oil reserve tank 20. The oil tank 20 is connected to the oil vat 4 via an oil booster pipe 21 equipped with an oil booster valve 22. The oil booster valve 22 is a normally closed valve that is manually opened and can be opened from the front side using a drop-in lever 23. Therefore, when the oil booster valve 22 is opened using the drop-in lever 23, the cooking oil in the oil booster tank 20 can be replenished to the oil vat 4. However, cooking oil supplied in excess of the storage capacity of the oil booster tank 20 overflows from the front of the oil booster tank 20 and can flow into the oil vat 4 from an overflow port 24 provided on the upper rear end of the oil vat 4.

[0012] The oil tank 4 has a first cooking section 25 and a second cooking section 26. The first cooking section 25 is formed on the upper side of the pulse burner 6 and is a square tube whose opening area does not change in the vertical direction. The second cooking section 26 is located on the upper side of the first cooking section 25 and is formed in a tapered shape that expands in the front, rear, left and right directions as it moves upward from the upper end of the first cooking section 25. The front wall 27 of the second cooking section 26 is inclined and extends longer than the left and right and rear parts. As shown in FIG. 5, the upper side of the second cooking section 26 is an opening 28 that rises upward from the upper end of the second cooking section 26 and whose opening area does not change in the vertical direction. The left and right side edges and the front edge of the opening 28 are each formed with folded pieces 29, 29... that are folded outward. Each folded piece 29 is engaged with the frame 3 and screwed. The rear edge of the opening 28 extends upward and is screwed to the fuel tank 20. The overflow port 24 is formed in the center of the rear edge of the opening 28 . The first cooking section 25 is provided with a first oil surface temperature sensor 31. The second cooking section 26 is provided with a second oil surface temperature sensor 32. A cooking temperature sensor 33 is provided in the oil vat 4 below the net 9.

[0013] As shown in Figs. 5 and 6, an oil refill port 35 is provided in the front right corner of the front wall 27 of the second cooking section 26 of the oil vat 4. The oil refill port 35 is located above the oil level position L of the maximum amount of oil in the second cooking section 26. The oil refill port 35 is a circular cylinder that penetrates a through hole 36 formed in the front wall 27 and protrudes vertically in a position perpendicular to the front wall 27. However, the upper surface of the oil refill port 35 is closed, and the internal flow path 37 is bent backward above the front wall 27 into an inverted L shape. Therefore, an outlet 38 of the internal flow path 37 opens at the rear surface of the oil refill port 35. A branch pipe 40 is connected to the oil addition port 35 below the front wall 27. The branch pipe 40 extends downward with its upper end coaxially connected to the lower end of the oil addition port 35. The branch pipe 40 is provided with an oil addition solenoid valve 41 that opens and closes the flow path within the branch pipe 40. A block-shaped pipe joint 42 is connected to the lower end of the branch pipe 40. An oil supply pipe 43 connected to a 18L can 76 (described later) and a jumper pipe 44 connected to a pipe joint 42B of the left branch pipe 40B are connected to the pipe joint 42A of the right branch pipe 40A. Therefore, cooking oil supplied from the oil supply pipe 43 branches into and flows through the branch pipe 40A and the jumper pipe 44 within the pipe joint 42A.

[0014] 7, the branch pipe 40A is disposed on the upper right side of the right air chamber 10A, which has a horizontally oriented oval shape when viewed from the front. The branch pipe 40B is disposed on the upper right side of the left air chamber 10B. The branch pipes 40A and 40B are each fixed to the frame 3 via a mounting bracket 45. Therefore, the transition pipe 44 connecting the pipe fittings 42A and 42B rises at an incline to the upper left along the right outer periphery of the air chamber 10A, and then moves horizontally to the left along the top surface of the air chamber 10A. The transition pipe 44 then descends at an incline to the lower left along the left outer periphery of the air chamber 10A, and then moves horizontally to the left to be bent into a trapezoidal shape when viewed from the front to be connected to the pipe fitting 42B. In other words, the transition pipe 44 is disposed in the left-right direction close to the outer periphery of the air chamber 10A. A plate-shaped insulating material 46 (FIG. 3) is provided on the underside of the front wall 27 above the connecting pipe 44. A plate-shaped insulating material 47 (FIG. 6) is also provided on the back surface of the fly controller 90 (described later) located above the connecting pipe 44.

[0015] A frame-shaped oil tank cover 50 is provided on the frame 3. As shown in Figures 4 and 5, the oil tank cover 50 has a left cover 51, a right cover 52, a center cover 53, a front cover 54, and a rear cover 55. The left and right covers 51, 52 extend in the front-rear direction, respectively covering the left and right outer folded-back pieces 29, 29 of the oil tanks 4, 4. The center cover 53 extends in the front-rear direction, covering the folded-back piece 29 between the oil tanks 4, 4. The front cover 54 extends in the left-right direction, covering the front folded-back pieces 29, 29 of the oil tanks 4, 4. The front ends of the left and right covers 51, 52 and the center cover 53 are connected to the front cover 54. The upper surface of the front cover 54 has a flat portion 56 whose frontmost portion is formed at the same height as the left and right covers 51, 52, and an inclined surface portion 57 which is gradually lowered from the flat portion 56 toward the rear and is wide from front to rear. The rear cover 55 is a horizontally long plate that covers the front surfaces of the left and right exhaust pipe covers 17, 17 from the front. The rear ends of the left and right covers 51, 52 and the center cover 53 are connected to the lower end of the rear cover 55. Basket hangers 58, 58 are fixed to the front surface of the rear cover 55. Windows 59, 59 that expose the overflow ports 24, 24 of the oil vats 4, 4 are formed in the lower end of the rear cover 55. In this manner, the oil tank cover 50 is fixed onto the frame 3 so as to cover the periphery and center of the oil tanks 4, 4 from above.

[0016] A filtering tank 65 with a filter at its bottom is provided below the left-hand oil vat 4B at the bottom of the device body 2. A collecting pipe 67 is provided in the left-right direction above the filtering tank 65, and is connected to oil drain pipes 66, 66 provided at the bottom of the oil vats 4, 4. The downstream end of the collecting pipe 67 is connected to the filtering tank 65, so that cooking oil in each oil vat 4 can be drained to the filtering tank 65 via the collecting pipe 67. Each of the oil drain pipes 66, 66 is provided with an oil drain valve (not shown), which is a normally closed valve. Each oil drain valve can be opened by manually operating an oil drain lever 68 provided on the front side. 3, a filtering pump 69 is provided at the bottom of the vessel body 2. The suction side of the filtering pump 69 is connected to the bottom of the filtering tank 65 via a suction pipe 70. The discharge side of the filtering pump 69 branches off for each oil tank 4. The branch pipes connected to each oil tank 4 branch off into a first oil supply pipe 71a and a second oil supply pipe 71b. The first fuel supply pipe 71a is connected to the fuel supply pipe 21. The first fuel supply pipe 71a is provided with a first fuel supply valve 72 which is a normally closed valve. The first fuel supply valve 72 can be opened by manually operating a fuel supply lever 73 provided on the front side. The second fuel supply pipe 71b is connected to the lower rear surface of the oil tank 4. The second fuel supply pipe 71b is provided with a second fuel supply valve (not shown) which is a normally closed valve. The second fuel supply valve can also be opened by manually operating a fuel supply lever 74 provided on the front side.

[0017] A 18L can stand 75 is provided below the right-side oil tank 4A. The 18L can stand 75 is provided at the bottom of the vessel body 2 so that it can be pulled out forward. A 18L can 76, which serves as an oil top-up tank, is provided on the 18L can stand 75, and the 18L can 76 can be kept warm by a heater (not shown). A 18L can lid 77 is placed on the 18L can 76, and an oil top-up pipe 78 provided on the 18L can lid 77 is inserted into the 18L can 76. The upper end of the oil addition pipe 78 is connected to the suction side of the oil addition pump 80. The oil addition pipe 43 is connected to the discharge side of the oil addition pump 80. The oil addition pipe 43 is routed upward on the right outside of the right air chamber 10A and connected to the right pipe joint 42A. A fry controller 90 is provided on the upper front surface of the body 2. The fry controller 90 includes an operation panel 91. The operation panel 91 allows the setting of a predetermined cooking mode and a maintenance menu, etc. A burner controller 92 is provided at the bottom of the device body 2. Detection signals from various sensors and the like are input to the burner controller 92. The burner controller 92 follows instructions from the fry controller 90 and controls the pulse burner 6, the fan 14, the various pumps, the heat retention heater, and the various solenoid valves to cook the food to be cooked, filter the cooking oil, and the like.

[0018] In the fryer 1 configured as described above, the amount of food to be cooked at one time is set to two types: a first rated amount and a second rated amount that is larger than the first rated amount. The cooking oil tank 20 is filled with cooking oil (the amount of oil increased from the first oil amount to the second oil amount). First, when cooking a first rated amount of food, cooking oil (first oil amount) is stored in the oil vat 4 up to the top end of the first cooking section 25. In this state, the user turns on the operation switch of the operation panel 91. Then, the burner controller 92 intermittently burns the mixed gas in the combustion chamber 7 to perform ON / OFF operation of the pulse burner 6. That is, the mixed gas is ignited in the combustion chamber 7 to cause it to explode and burn in the combustion chamber 7, and the combustion exhaust is forcibly discharged to the tail pipe 8 due to the increase in pressure in the combustion chamber 7 caused by the combustion. Then, fuel gas and combustion air are sucked into the combustion chamber 7, which is placed under negative pressure due to the discharge of the combustion exhaust. This ON / OFF operation is repeated to heat the cooking oil stored in the oil vat 4.

[0019] Burner controller 92 monitors the detected temperature obtained from cooking temperature sensor 33. When the detected temperature reaches a predetermined cooking temperature (for example, 180 to 182°C), fry controller 90 notifies the user by, for example, outputting a display indicating that cooking is OK on operation panel 91. When this notification is given, the cook places a basket containing the first rated amount of food into oil vat 4. Then, when the first cooking mode is selected by operating the operation panel 91 and the cooking start button is pressed, the burner controller 92 heats and cooks the food to be cooked for a first cooking time preset in correspondence with the first rated amount and with a first heat amount of the pulse burner 6. When the time is up, the fry controller 90 sounds an alarm to notify the end of cooking. At this time, the combustion exhaust gas generated from the pulse combustor 6 moves through the exhaust pipes 15, 15 to the rear side of the oil tank 4, is discharged into the exhaust adapter 18 via the mufflers 16, 16, and is discharged forward from the exhaust adapter 18. In this way, when the exhaust gas passes through the mufflers 16, 16, the heat of the exhaust gas is transferred to the cooking oil inside the oil booster tank 20, which is in contact with the mufflers 16, 16. Therefore, the exhaust heat of the exhaust gas can be used to effectively increase the temperature of the cooking oil.

[0020] When switching from the first cooking mode to the second cooking mode, it is necessary to increase the amount of cooking oil from the oil increase tank 20. Therefore, when the user operates the drop lever 23 to open the oil increase valve 22, the increased amount of cooking oil in the oil increase tank 20 is supplied to the oil vat 4 via the oil increase pipe 21. The oil increase tank 20 becomes empty. In this way, cooking oil is supplied to the oil level position L (second oil amount) of the second cooking section 26, and when the burner controller 92 confirms through the cooking temperature sensor 33 that the temperature of the cooking oil has reached the cooking temperature, the fry controller 90 notifies the user by, for example, outputting a display indicating that cooking is OK on the operation panel 91. When this notification is given, the user places a basket containing the second rated amount of food into the oil vat 4. When the second cooking mode is selected on the operation panel 91 and the cooking start button is pressed, the burner controller 92 heats the food for a second cooking time preset in accordance with the second rated amount and with a second amount of heat greater than the first amount of heat in the first cooking mode. When the time is up, the fry controller 90 sounds an alarm to notify the end of cooking. During cooking in each cooking mode, the oil-adding solenoid valve 41 is closed. Therefore, even if the oil level reaches the oil-adding port 35 when the food to be cooked is placed in the oil vat 4, the oil will not flow back to the oil-adding pipe 43.

[0021] On the other hand, during operation in the first and second cooking modes, the burner controller 92 monitors the detected temperature obtained from a tank temperature sensor (not shown) provided on the one-gallon can stand 75. Then, the burner controller 92 controls the ON / OFF of the heat retention heater so that a predetermined heat retention temperature is maintained in the one-gallon can 76. When the first and second oil surface temperature sensors 31, 32 detect a reduction in the amount of cooking oil required in either the first or second cooking mode, or when a specified number of cooking cycles is reached, the burner controller 92 drives the oil top-up pump 80 to open either or both of the oil top-up solenoid valves 41A, 41B of the corresponding oil tanks 4A, 4B. For example, when it is determined that oil needs to be added to the right-side oil tank 4A, the oil-adding pump 80 is driven and the oil-adding solenoid valve 41A is opened. Then, cooking oil liquefied in the 18-liter can 76 is sucked in through the oil-adding pipe 78 and flows from the oil-adding pump 80 through the oil-adding pipe 43, the pipe joint 42A, and the branch pipe 40A to the oil-adding port 35A. Therefore, the cooking oil is supplied from the outlet 38 of the oil-adding port 35A along the top surface of the front wall 27 into the oil tank 4A.

[0022] At this time, since the left oil addition solenoid valve 41B is closed, even if cooking oil flows from the connecting pipe 44 to the pipe joint 42B, no cooking oil flows into the branch pipe 40B. Since the connecting pipe 44 is adjacent to the air chamber 10A from above, the heat generated from the air chamber 10A is transferred to the connecting pipe 44. This makes it difficult for the cooking oil in the connecting pipe 44 to solidify. Also, since the insulating materials 46, 47 are provided above the connecting pipe 44, the heat generated from the air chamber 10A can be efficiently transferred to the connecting pipe 44 without escaping. When it is determined that oil needs to be added in the left oil tank 4B, the oil addition pump 80 is driven and the oil addition solenoid valve 41B is opened. Then, the cooking oil in the 18-liter can 76 flows through the oil addition pipe 78, the oil addition pump 80, the oil addition pipe 43, the pipe joint 42A, the connecting pipe 44, the pipe joint 42B, and the branch pipe 40B to the oil addition port 35B. Therefore, the cooking oil is supplied from the outlet 38 of the oil addition port 35B along the upper surface of the front wall 27 into the oil tank 4B. In this case, the connecting pipe 44 is also heated by heat transfer from the air chamber 10A, so that the cooking oil in the connecting pipe 44 does not solidify, or even if some of it has solidified, it is quickly liquefied and supplied to the oil top-up port 35B. In addition, when it is determined that additional oil is required in the oil tanks 4A, 4B on both the left and right sides, the additional oil pump 80 is driven and the additional oil solenoid valves 41A, 41B both open, and oil is supplied to each oil tank 4 from the outlets 38 of the additional oil ports 35A, 35B as described above.

[0023] Also, cooking oil can be supplied from the oil booster tank 20 at a predetermined timing by the user. In this case, the user opens the oil booster valve 22 of the oil booster pipe 21 by operating the drop lever 23. Then, the cooking oil in the oil booster tank 20 is supplied to the oil vat 4 via the oil booster pipe 21. The supply of cooking oil is stopped by closing the oil booster valve 22.

[0024] When switching from the second cooking mode to the first cooking mode, which uses a smaller amount of oil, the user operates the oil drain lever 68 of the corresponding oil vat 4 to open the oil drain valve, causing all of the cooking oil in the oil vat 4 to flow through the collecting pipe 67 into the filtering tank 65. Next, the first fuel supply valve 72 of the first fuel supply pipe 71a is opened by operating the fuel supply lever 73, and filtering is selected on the operation panel 91. Then, the burner controller 92 drives the filtering pump 69 to filter the cooking oil in the filtering tank 65, and then supplies the filtered oil to the fuel supply tank 20 via the first fuel supply pipe 71a and the fuel supply pipe 21. When the cooking oil supplied to the oil booster tank 20 exceeds the full capacity (additional oil amount), it overflows from the oil booster tank 20 and falls into the oil vat 4 from the overflow port 24. When the filtering tank 65 becomes empty, of the second amount of cooking oil, only the amount of cooking oil added from the first amount of oil remains in the oil booster tank 20. That is, the first amount of cooking oil used in the first cooking mode is stored in the oil vat 4.

[0025] (Effect of disclosure regarding the location of the oil top-up port) The fryer 1 in the above-described form is supported within the vessel body 2, contains a predetermined amount of cooking oil, and comprises an oil vat 4 having a front wall 27 extending forward as it goes upward, a pulse burner 6 (heating means) that heats the cooking oil in the oil vat 4, a 18L can 76 (oil addition tank) that stores the cooking oil, and an oil addition pipe 43 that connects the 18L can 76 to the oil vat 4. An oil addition port 35 to which the oil addition pipe 43 is connected is provided on the front wall 27 of the oil vat 4, and the oil addition port 35 is positioned above the oil level when predetermined amounts (first oil amount and second oil amount) of cooking oil are supplied to the oil vat 4. This configuration makes it possible to prevent cooking oil in the oil vat 4 from entering the oil refill pipe 43. Therefore, even if the oil refill pipe 43 for refilling new cooking oil from the 18-liter can 76 is connected to the oil vat 4, it is possible to prevent cooking oil from flowing back from the oil vat 4 to the 18-liter can 76. In addition, since the cooking oil supplied from the oil refill port 35 flows gently into the oil vat 4 along the front wall 27, splashing of cooking oil is less likely to occur when oil is added.

[0026] The oil top-up port 35 is cylindrical and protrudes from the front wall 27, with the outlet 38 opening backward. This allows the opening area to be smaller than when an outlet is provided in the front wall 27. This further reduces the possibility of cooking oil flowing back from the outlet 38. The container body 2 is provided with an oil tank cover 50 (cover) that covers the oil refill port 35 from above, so that the oil refill port 35 can be hidden. This eliminates the risk of a basket or the like coming into contact with the oil refill port 35 and damaging it when food is placed in the oil tank 4. The oil tank 4 includes a filtering tank 65 that filters the cooking oil in the oil tank 4, and a second oil supply pipe 71b (oil supply pipe) that returns the cooking oil filtered in the filtering tank 65 to the oil tank 4, and the second oil supply pipe 71b is connected to the rear of the oil tank 4. Therefore, in the oil tank 4, the connection port of the second oil supply pipe 71b and the oil top-up port 35 can be positioned with a large distance between them in the front and rear. This prevents the filtered cooking oil from flowing around the oil top-up port 35, further reducing the risk of the cooking oil flowing back toward the oil top-up pipe 43.

[0027] The following modifications are possible with respect to the disclosure regarding the placement of the oil top-up port. The oil addition port does not have to have an internal flow passage shaped like an inverted L. The oil addition port itself may be an inverted L-shaped cylinder. The position of the oil addition port is not limited to the above embodiment, and can be changed as appropriate as long as it is higher than the oil levels of the first and second oil volumes. The oil addition port may be an opening formed in the front wall, rather than projecting from the front wall. The oil supply port does not have to open toward the rear. The shape of the cover that covers the oil addition port is not limited to the above-described embodiment. The filtering function including the filtering tank may be omitted. The oil tank may be anything other than a 18L can. There may be multiple oil tanks. The heating means is not limited to the pulse combustor, but may be an electric heater, a burner, or a combination of these. In the above embodiment, two oil tanks are arranged side by side on the left and right, but the present disclosure can be applied to fryers with three or more oil tanks arranged side by side or fryers with one oil tank. In this case, the oil supply pipe is directly connected to the oil supply port without using a branch pipe. The present disclosure is also applicable to a pressure fryer in which the opening of the oil tank is closed with a lid.

[0028] (Effect of disclosure regarding a crossover pipe connecting multiple branch pipes) The fryer 1 of the above embodiment includes a plurality of oil tanks 4, 4 arranged in parallel in the left-right direction to store cooking oil, a pulse burner 6 (combustion heating means) for heating the cooking oil in each oil tank 4, a 18L can 76 (additional oil tank) for storing cooking oil, and an oil adding means for supplying cooking oil from the 18L can 76 to each oil tank 4. The pulse burner 6 also includes an air chamber 10 (combustion exhaust passage) provided outside each oil tank 4 and through which the combustion exhaust passes. The oil adding means further includes an oil adding pipe 43 connected to the 18L can 76, an oil adding pump 80 provided in the oil adding pipe 43, a plurality of branch pipes 40A, 40B connected to each oil tank 4, and a connecting pipe 44 that connects the branch pipes 40A, 40B between the oil tanks 4A, 4B adjacent to each other in the left-right direction and is connected to the oil adding pipe 43 downstream of the oil adding pump 80. The connecting pipe 44 is disposed adjacent to the outer surface of the air chamber 10A.

[0029] According to this configuration, when the pulse burner 6 in the oil vat 4A is activated, its heat is efficiently transferred from the air chamber 10A to the connecting pipe 44 and the branch pipes 40A and 40B. Therefore, the solid oil inside the piping can be quickly liquefied, and when the cooking oil in the oil vat 4 runs low, oil can be quickly added. Even if only one oil vat 4A is used and the other oil vat 4B is not used, the heat on the side of the oil vat A that is in use is transferred to the branch pipe 40B on the side of the unused oil vat 4B. Therefore, the time from starting use of the oil vat 4B until oil can be added can be shortened. In particular, since the heat insulating materials 46, 47 that cover the air chamber 10A and the connecting pipe 44 from above are provided above the air chamber 10A where the connecting pipe 44 is disposed, the heat around the air chamber 10A can be transferred to the connecting pipe 44 without escaping, which allows for quicker oil addition. The combustion heating means is a pulse combustor 6 having a combustion chamber 7 and a tail pipe 8 in the oil vat 4, and the combustion exhaust passage is an air chamber 10A through which the tail pipe 8 extends outside the oil vat 4. Therefore, the heat of the combustion exhaust passing through the tail pipe 8 can be efficiently transferred to the crossover pipe 44 by utilizing the air chamber 10A.

[0030] The disclosure relating to a transition pipe connecting multiple branch pipes may be modified as follows. The jumper tube may partially abut the air chamber. The transition pipe may abut or be adjacent to a surface other than the upper surface of the air chamber. The shape of the air chamber is not limited to the above embodiment, and the connecting pipe can also be appropriately changed according to the shape of the air chamber. The combustion exhaust passage is not limited to the air chamber. If the combustion chamber or the tail pipe is exposed to the outside of the fuel tank, the crossover pipe may be in contact with or adjacent to the combustion chamber or the tail pipe. The shape and size of the heat insulating material can be changed as appropriate. It can be provided on places other than the underside of the front wall and the back of the fly controller. The heat insulating material can be omitted. In the above embodiment, the oil supply pipe is connected to the pipe joint of the branch pipe on the right side, but depending on the position of the 18L can, it may be connected to the pipe joint on the left side. Also, the oil supply pipe may be connected to a crossover pipe to branch off.

[0031] On the other hand, the oil tank may be anything other than a 18L can. There may be multiple oil tanks. The combustion heating means is not limited to a pulse combustor, but a burner may also be used. In the above embodiment, a fryer having two oil tanks arranged side by side is exemplified, but the present disclosure is also applicable to a fryer having three or more oil tanks arranged side by side. In this case, a connecting pipe is provided for each of the air chambers (combustion exhaust passage parts). The present disclosure is also applicable to a structure in which a partition plate 60 is provided in the center of the left-right direction of each oil vat 4, and each oil vat 4 is divided into two separate oil vats 4a, 4a, each having a pulse combustor 6, as in the fryer 1a shown in Figures 8, 9, and 10. In this case, the oil top-up port 35 and the branch pipe 40 are provided for each of the divided oil tanks 4a. The pipe joints 42 provided on each of the branch pipes 40 are connected in order from the right side by three jumper pipes 44, 44.... Of course, the order of connections can be changed as appropriate. In this manner, even in a structure in which the branch pipes 40 are connected to each of the divided oil tanks 4a divided into left and right sides by the partition plate 60 and connected by the connecting pipes 44, when the cooking oil in each divided oil tank 4a decreases, oil can be quickly added by operating the oil addition pump 80 and opening the oil addition solenoid valve 41 of the corresponding branch pipe 40. 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]

[0032] 1,1a··fryer, 2··body, 3··frame, 4··oil tank, 6··pulse burner, 7··combustion chamber, 8··tail pipe, 10··air chamber, 25··first cooking section, 26··second cooking section, 27··front wall, 28··opening, 35··oil top-up port, 37··internal flow passage, 38··outlet, 40··branch pipe, 41··oil top-up solenoid valve, 42··pipe joint, 43··oil top-up pipe, 44··crossover pipe, 46,47·· Insulation material, 50··oil tank cover, 51··left cover, 52··right cover, 53··centre cover, 54··front cover, 55··rear cover, 57··inclined surface, 60··partition plate, 65··filtering tank, 71a··first oil supply pipe, 75··18L can stand, 76··18L can, 78··oil top-up pipe, 80··oil top-up pump, 90··fry controller, 91··operation panel, 92··burner controller.

Claims

1. an oil tank supported within the container body to hold a predetermined amount of cooking oil and having a sloping front wall that extends forward as it goes upward; A heating means for heating the cooking oil in the oil tank; A top-up oil tank for storing cooking oil; A fryer comprising an oil supply pipe connecting the oil supply tank and the oil tank, A fryer characterized in that an oil addition port to which the oil addition pipe is connected is provided on the front wall of the oil tank, and the oil addition port is positioned above the oil level when the specified amount of cooking oil is supplied to the oil tank.

2. 2. The fryer according to claim 1, wherein the oil addition port is cylindrical and protrudes from the front wall and opens rearward.

3. 3. The fryer according to claim 1, wherein the container body is provided with a cover that covers the oil refill port from above.

4. A fryer as described in Claim 3, characterized in that the oil tank is provided with a frame-shaped oil tank cover that covers the periphery of the oil tank from above, and the cover is formed integrally with the oil tank cover.

5. A filtering tank for filtering the cooking oil in the oil tank, and an oil supply pipe for returning the cooking oil filtered in the filtering tank to the oil tank, 5. The fryer according to claim 1, wherein the oil supply pipe is connected to a rear portion of the oil tank.

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