Flyer

Abstract

To prevent damage of a tail pipe due to stress concentration by avoiding point contact between the tail pipe and a net body even when the net body is mounted on the tail pipe.SOLUTION: In a fryer 1, a net body 20 is mounted on straight pipe parts 15A, 15C in an oil tank 4, and the net body 20 includes an outer frame 21 formed in accordance with a horizontal cross-sectional shape inside the oil tank 4, a vertical bar 23 extending in a back and forth direction inside the outer frame 21, and a horizontal bar 22 extending in a horizontal direction in the outer frame 21. Vertical bars 23D1, 23D4 are placed below the horizontal bar 22 at a position overlapping the straight pipe parts 15A, 15C in a planar view, and in the mount state on the straight pipe part 15, the vertical bars 23D1, 23D4 are in linear contact with the straight pipe parts 15A, 15C to support the net body 20.SELECTED DRAWING: Figure 4

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 is provided with a pulse combustor as a heating means in an oil vat that contains cooking oil. As disclosed in Patent Document 1, for example, this pulse combustor is known to have a combustion chamber in which a mixture of fuel gas and combustion air is burned, and a tail pipe connected to the combustion chamber and through which combustion exhaust passes. This tail pipe is formed in a serpentine shape consisting of multiple straight pipe sections extending in the front-rear direction in the oil vat and U-shaped bent pipe sections that connect the ends of the straight pipe sections alternately in the front and rear. The multiple straight pipe sections are arranged in parallel at the same height in the oil vat, and a net body can be supported at the uppermost position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-299658 Summary of the Invention [Problem to be solved by the invention]

[0004] The mesh body placed on the tail pipe is formed by welding an outer frame formed to fit the cross-sectional shape of the oil vat, multiple horizontal bars extending left and right within the outer frame, and multiple vertical bars extending front and rear within the outer frame. When a basket containing food to be cooked is dropped into the oil vat, the basket is received by the mesh body, preventing the basket from coming into direct contact with the tail pipe. However, if the horizontal bar of the mesh body is located on the lower side, there will be a point contact between the horizontal bar and the uppermost point of the straight section of the tailpipe, so that the impact when the basket is dropped will be concentrated at the point of contact, which may dent or damage the tailpipe.

[0005] Therefore, the present disclosure aims to provide a flyer that can prevent damage to the tailpipe due to stress concentration by avoiding point contact between the tailpipe and the mesh body even when the mesh body is placed on the tailpipe. [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 pulse combustor disposed in the oil tank for heating the cooking oil; the pulse combustor has a combustion chamber and a serpentine tail pipe connected to the combustion chamber and through which combustion exhaust passes, the tail pipe having a plurality of straight pipe portions at a top position extending in a front-rear direction within the oil tank and parallel to each other, A fryer in which a net body is placed on the plurality of straight pipe sections in the oil tank, The net body has an outer frame formed to fit the horizontal cross-sectional shape of the inside of the oil tank; A vertical bar extending in the front-rear direction within the outer frame; A horizontal bar extending in the left-right direction within the outer frame, The vertical bars are disposed below the horizontal bars at positions overlapping the straight pipe section at least in a plan view, and when placed on the straight pipe section, the vertical bars support the mesh body by making line contact with the straight pipe section. Along with, The vertical bar is also disposed above the horizontal bar at a position overlapping the straight pipe section at least in a plan view, so that even if the mesh body is rotated around a virtual axis in the left-right direction and placed upside down, the vertical bar supports the mesh body by making line contact with the straight pipe section. It is characterized by: Another aspect of the present disclosure is characterized in that, in the above configuration, the multiple straight pipe sections are arranged symmetrically in a planar view, and the vertical bars are arranged with rotational symmetry in line contact with the straight pipe sections even when the mesh body is rotated around a vertical imaginary axis passing through the axis of symmetry of the straight pipe sections and placed upside down. Another aspect of the present disclosure is characterized in that, in the above configuration, the multiple straight pipe sections are arranged symmetrically in a planar view, and the vertical bars are arranged symmetrically in line contact with the straight pipe sections even when the mesh body is rotated around the axis of symmetry of the straight pipe sections and placed upside down. Effect of the Invention

[0007] According to the present disclosure, when the mesh body is placed on the tailpipe, the vertical bars come into line contact with the straight pipe portion, and the horizontal bars are prevented from coming into point contact with the straight pipe portion, thereby dispersing the stress applied to the tailpipe and preventing deformation or damage to the tailpipe. In addition, the vertical bar is also positioned above the horizontal bar at a position that overlaps with the straight pipe section in a planar view, so that even if the mesh body is rotated around a virtual axis in the left-right direction and placed upside down, it will still make line contact with the straight pipe section, so the mesh body can be placed without worrying about the front and back, and in either case the horizontal bar can be prevented from making point contact with the straight pipe section. According to another aspect of the present disclosure, in addition to the above effects, the straight pipe section is arranged symmetrically in a planar view, and the vertical bars are arranged rotationally symmetrically so as to make line contact with the straight pipe section, even if the mesh body is rotated around a vertical imaginary axis passing through the axis of symmetry of the straight pipe section and placed upside down, so that the mesh body can be placed without regard for the front-to-back orientation, and in either case the horizontal bars can be prevented from making point contact with the straight pipe section. According to another aspect of the present disclosure, in addition to the above effects, the vertical bars are arranged symmetrically so as to make line contact with the straight pipe section even if the mesh body is rotated around the axis of symmetry of the straight pipe section and placed upside down, so that the horizontal bars can be prevented from making point contact with the straight pipe section even if the mesh body is flipped left to right. [Brief description of the drawings]

[0008] [Figure 1] FIG. [Diagram 2] FIG. 2 is a side view of the fryer. [Diagram 3] FIG. [Figure 4] FIG. 4 is an enlarged view of the oil tank portion on the left side of FIG. [Diagram 5] 5 is a cross-sectional view taken along line AA in FIG. 4. [Figure 6] 5 is a cross-sectional view taken along line BB in FIG. 4. [Figure 7] FIG. [Figure 8] An explanatory diagram of the mesh: (A) shows the front, (B) shows the top view, and (C) shows the side view. [Figure 9] FIG. 7 is a cross-sectional view equivalent to FIG. 6, in which the net body is placed upside down. 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 side view of the fryer, and Fig. 3 is a plan view thereof, Fig. 4 is an enlarged view of an oil tank portion of Fig. 3, and Fig. 5 is a cross-sectional view taken along line AA of Fig. 4. 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 substantially the same for each of the oil vats 4 on the left and right sides, and therefore, unless otherwise specified, the left oil vat 4 will be mainly described. The oil vat 4 has a bottom 6 on which pulse burners 12, 12 described later are installed, and a first cooking section 7 and a second cooking section 8 above the bottom 6. The first cooking section 7 is formed on the top of the bottom 6 and has a rectangular tubular shape 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 a tapered shape that widens in all directions as it moves upward from the top end of the first cooking section 7. A first oil surface temperature sensor 9 is provided in the first cooking section 7. A second oil surface temperature sensor 10 is provided in the second cooking section 8. A cooking temperature sensor 11 is provided in the oil vat 4 behind the pulse burners 12.

[0010] A pair of left and right pulse combustors 12, 12 are provided on the bottom 6 within the oil tank 4. Each pulse combustor 12 includes a combustion chamber 13 and a tail pipe 14. One end of each tail pipe 14 is connected to the outer left and right side surfaces of the combustion chamber 13. Inside the oil vat 4, the tail pipe 14 is in a serpentine shape including four straight pipe sections 15A-15D and a plurality of curved pipe sections 16, 16... that alternately connect the front and rear ends of the straight pipe sections 15A-15D. The other end of the serpentine tail pipe 14 is drawn out to the front side of the oil vat 4. Of the straight pipe sections 15A to 15D, the three straight pipe sections 15A to 15C on the upstream side (combustion chamber 13 side) are arranged in the front-rear direction and are parallel to each other. The most downstream straight pipe section 15D is arranged diagonally downward and forward and connected to the outside of the oil tank 4. Of the three straight pipe sections 15A to 15C, the outermost straight pipe section 15A, which is closest to the left and right inner walls of the oil vat 4 on the connection side with the combustion chamber 13, and the innermost straight pipe section 15C, which is closest to the center of the oil vat 4, are disposed at the uppermost positions in the oil vat 4, as shown in Figures 5 and 6. The left and right pulse burners 12, 12 are disposed so as to be mirror symmetrical about an imaginary plane F that extends in the front-rear and up-down directions at the left-right center of the first cooking section 7. Thus, the straight pipe sections 15A, 15A and the straight pipe sections 15C, 15C are disposed so as to be symmetrical about the imaginary plane F in a plan view.

[0011] A mesh body 20 is provided above the pulse combustors 12, 12 in the oil vat 4. The mesh body 20 is placed on the left and right tail pipes 14, 14 between the bottom 6 and the first cooking section 7. The mesh body 20 has a rectangular shape in a plan view that roughly matches the horizontal cross-sectional shape of the first cooking section 7. 7 and 8, the mesh body 20 has an outer frame 21 that forms the outer shape, two horizontal bars 22, 22 extending left and right within the outer frame 21, and a number of vertical bars 23, 23... extending front and rear within the outer frame 21. All of these are made of wire and are integrated by welding their intersections. The outer frame 21 has front and rear side portions 24, 24 and left and right side portions 25, 25. The front and rear side portions 24, 24 have recesses 26, 26 formed in the central portions excluding the left and right ends so that they are recessed toward the opposing sides. The left and right side portions 25, 25 have upward bent portions 27, 27 formed in the central portions excluding the front and rear ends so that they protrude upward by the length of one wire rod in a side view. The horizontal bars 22, 22 are disposed in the front and rear from the center of the outer frame 21 below the upper bent portions 27, 27, and both left and right ends are welded to the upper bent portions 27, 27. Therefore, the vertical height of the horizontal bars 22, 22 is the same as the front and rear ends of the left and right side portions 25, 25.

[0012] Eight vertical bars 23 are disposed on the upper side and ten on the lower side, sandwiching the outer frame 21 and the horizontal bars 22, 22, with both front and rear ends welded to the outer frame 21 and middle portions welded to the horizontal bars 22, 22. The lower vertical bars 23 are disposed at equal intervals on the left and right, five on each side, so as to be symmetrical about the axis of symmetry A1 that extends in the front-rear direction at the left-right center of the net body 20 in a plan view. The upper vertical bars 23 are also disposed at equal intervals on the left and right, four on each side, so as to be symmetrical about the axis of symmetry A1 in a plan view. Hereinafter, when distinguishing the upper vertical bar 23 from the lower one, it will be written as 23U, and when distinguishing between the upper vertical bars 23U, they will be written as 23U1, 23U2, ... 23U4 from the left and right outer sides toward the center, respectively. Similarly, when distinguishing the lower vertical bar 23 from the upper one, it will be written as 23D, and when distinguishing between the lower vertical bars 23D, they will be written as 23D1, 23D2, ... 23D5 from the left and right outer sides toward the center, respectively. In the lower vertical bar 23D, the two outer vertical bars 23D1, 23D1 are connected to the left and right sides of the recesses 26, 26 in the front and rear sides 24, 24. The two vertical bars 23D3, 23D4 arranged in the middle between the left and right have their front and rear ends connected in a semicircular shape to form an elliptical shape in plan view.

[0013] In this state, the two outer vertical bars 23D1, 23D1 on the left and right overlap the straight pipe sections 15A, 15A in the up-down direction, respectively, in a plan view, as shown in Fig. 6. Similarly, the two inner vertical bars 23D4, 23D4 forming the left and right oval shapes also overlap the straight pipe sections 15C, 15C in the up-down direction, respectively, in a plan view. Therefore, when the mesh body 20 is placed on the tail pipe 14, the front recess 26 of the outer frame 21 abuts on the upper surfaces of the left and right combustion chambers 13, 13, and the rear recess 26 abuts on the upper surface of the cooking temperature sensor 11. Then, each vertical bar 23D1 and each vertical bar 23D4 are in close proximity or in line contact with the surfaces of the straight pipe parts 15A, 15C to support the mesh body 20 horizontally. The arrangement of the vertical bars 23D1, 23D4 relative to the straight pipe parts 15A, 15C does not change even if the mesh body 20 is rotated back and forth around the imaginary axis A2 in the up-down direction passing through the center O (FIG. 7) of the mesh body 20 in the front-back direction on the symmetrical axis A1. In other words, since the vertical bar 23D is also formed in rotational symmetry, the vertical bars 23D1, 23D4 are always in close proximity or in line contact with the straight pipe parts 15A, 15C regardless of the front-back direction of the mesh body 20.

[0014] In the upper vertical bar 23U, the two vertical bars 23U2 and 23U3 located in the middle between the left and right sides form an ellipse in a plan view with the front and rear ends connected in a semicircle, similar to the vertical bars 23D3 and 23D4. The upper vertical bar 23U does not overlap the lower vertical bar 23D in a plan view, but is shifted in the left-right direction and is arranged alternately with the horizontal bars 22 and 22. In this state, the two inner vertical bars 23U4, 23U4 overlap the straight pipe portions 15C, 15C in the up-down direction, respectively, in a plan view. Similarly, the upper bent portions 27, 27 of the left and right side portions 25, 25 also overlap the straight pipe portions 15A, 15A in the up-down direction, respectively, in a plan view. Therefore, when the mesh body 20 is flipped over around a virtual axis A3 in the left-right direction passing through the center O in a plan view and placed on the tail pipe 14 upside down, the front and rear recesses 26, 26 of the outer frame 21 abut the left and right combustion chambers 13, 13 and the upper surface of the cooking temperature sensor 11, as described above. Then, as shown in Fig. 9, the vertical bars 23U4, 23U4 are close to or in line contact with the surfaces of the straight pipe sections 15C, 15C, and the upper bent portions 27, 27 are close to or in line contact with the surfaces of the straight pipe sections 15A, 15A, supporting the mesh body 20 horizontally. The arrangement of the vertical bars 23U4, 23U4 and the upper bent portions 27, 27 relative to the straight pipe sections 15 does not change even if the flipped mesh body 20 is rotated back and forth around a virtual axis A2 in the up-down direction. In other words, since the vertical bars 23U4, 23U4 and the upper bent portions 27, 27 are also formed with rotational symmetry, when the mesh body 20 is turned upside down, the vertical bars 23U4, 23U4 and the upper bent portions 27, 27 are always in close proximity to or in line contact with the straight pipe portions 15A, 15C, regardless of the orientation of the mesh body 20, whether front to back or back.

[0015] 1 and 2, an air chamber 30 is provided on the outside of the front side of the oil vat 4. A mixing chamber (not shown) communicating with the combustion chambers 13, 13 is provided inside the air chamber 30. A gas conduit 31 equipped with a gas solenoid valve 32 is connected to the mixing chamber to supply fuel gas. In addition, the mixing chamber is connected to an air supply pipe 33. The air supply pipe 33 is connected to a fan 34 provided at the rear bottom of the body 2, and air for combustion is supplied. The tail pipes 14, 14 drawn out to the outside of the oil vat 4 are connected to a pair of left and right exhaust pipes 35, 35 in the air chamber 30. The exhaust pipes 35, 35 are drawn out from the air chamber 30 and routed to the rear of the vessel body 2, and then extend upward behind the oil vat 4 to be able to discharge the combustion exhaust. Cylindrical mufflers 36, 36 are provided at the upward downstream ends of the exhaust pipes 35, 35. The upper parts of the mufflers 36, 36 are covered from above by an exhaust pipe cover 37, and the upper ends of the exhaust pipes 35, 35 protrude into an exhaust adapter 38.

[0016] An oil reserve tank 40 for replenishing cooking oil to the oil vat 4 is housed inside the exhaust pipe cover 37 and in front of the mufflers 36, 36. The mufflers 36, 36 are in contact with the rear surface of the oil reserve tank 40. The oil tank 40 is connected to the oil vat 4 via an oil booster pipe 41 equipped with an oil booster valve 42. The oil booster valve 42 is a normally closed valve that is manually opened and can be opened from the front side using a drop-in lever 43. Therefore, when the oil booster valve 42 is opened using the drop-in lever 43, the cooking oil in the oil booster tank 40 can be replenished to the oil vat 4. However, cooking oil supplied in excess of the storage capacity of the oil booster tank 40 overflows from the front of the oil booster tank 40 and can flow into the oil vat 4 from an overflow port 44 provided on the upper rear end of the oil vat 4.

[0017] A 18L can stand 45 is provided below the right-side oil vat 4. The 18L can stand 45 is provided at the bottom of the vessel body 2 so that it can be pulled out forward. A 18L can 46 is provided on the 18L can stand 45 as an oil tank, and the 18L can 46 can be kept warm by a heater (not shown). A 18L can lid 47 is placed on the 18L can 46, and an oil-adding pipe 48 provided on the 18L can lid 47 is inserted into the 18L can 46. The upper end of the oil-adding pipe 48 is connected to the suction side of an oil-adding pump 49. An oil-adding pipe 50 is connected to the discharge side of the oil-adding pump 49. The oil-adding pipe 50 branches out for each oil vat 4 and is connected to an oil-adding port 51 provided on the front wall of the second cooking section 8 of each oil vat 4 via an oil-adding solenoid valve 52.

[0018] A filtering tank 55 with a filter at the bottom is provided below the left-hand oil vat 4 at the bottom of the device body 2. Collecting pipes 57 are provided in the left-right direction above the filtering tank 55 and connected to oil drain pipes 56 provided at the bottom of each oil vat 4. The downstream end of the collecting pipe 57 is connected to the filtering tank 55, so that cooking oil in each oil vat 4 can be drained into the filtering tank 55 via the collecting pipe 57. Each oil draining pipe 56 is provided with an oil draining valve (not shown) that is a normally closed valve. Each oil draining valve can be opened by manually operating an oil draining lever 58 provided on the front side. A filtering pump 60 is provided at the bottom of the vessel body 2. The suction side of the filtering pump 60 is connected to the bottom of the filtering tank 55 via a suction pipe 61. The discharge side of the filtering pump 60 branches off for each oil tank 4. The branch pipes connected to each oil tank 4 further branch off into a first oil supply pipe 62 and a second oil supply pipe 63. The first fuel supply pipe 62 is connected to the fuel supply pipe 41. The first fuel supply pipe 62 is provided with a first fuel supply valve 64, which is a normally closed valve. The first fuel supply valve 64 can be opened by manually operating an oil supply lever (not shown) provided on the front side. The second fuel supply pipe 63 is connected to the lower rear surface of the oil tank 4. The second fuel supply pipe 63 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 an oil supply lever (not shown) provided on the front side.

[0019] A fry controller 65 is provided for each oil tank 4 at the upper front portion of the body 2. The fry controller 65 includes an operation panel 66. The operation panel 66 allows the user to set a predetermined cooking mode and a maintenance menu, etc. A burner controller 67 is provided at the bottom of the device body 2. Detection signals from each sensor and the like are input to the burner controller 67. In accordance with instructions from the fry controller 65, the burner controller 67 controls the pulse burner 12, the fan 34, each pump, the heat retention heater, and each electromagnetic valve to cook the food to be cooked, filter the cooking oil, and the like.

[0020] 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 40 contains cooking oil in a full state (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 7. In this state, the user turns on the operation switch of the operation panel 66. Then, the burner controller 67 intermittently burns the mixed gas in the combustion chamber 13 to perform ON / OFF operation of the pulse burner 12. That is, the mixed gas is ignited in the combustion chamber 13 to cause it to explode and burn in the combustion chamber 13, and the combustion exhaust is forcibly discharged to the tail pipe 14 due to the increase in pressure in the combustion chamber 13 caused by the combustion. Then, fuel gas and combustion air are sucked into the combustion chamber 13, which is 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.

[0021] Burner controller 67 monitors the detected temperature obtained from cooking temperature sensor 11. When the detected temperature reaches a predetermined cooking temperature (for example, 180 to 182°C), fry controller 65 notifies the user by, for example, outputting a display indicating that cooking is OK on operation panel 66. When this notification is given, the cook places a basket containing the first rated amount of food into oil vat 4. The dropped basket is supported on the net body 20. If the basket is dropped with a strong force, the impact of placing it on the net body 20 will cause the net body 20 to bend downward, and the vertical bar 23D will come into contact with or be pressed against the straight pipe sections 15A, 15C. However, since the vertical bar 23D is in line contact with the straight pipe sections 15A, 15C, the stress is dispersed and damage to the tail pipe 14 is prevented. This is the same even if the orientation of the net body 20, which is formed with rotational symmetry and left-right symmetry as described above, is changed from front to back or even if it is turned over.

[0022] Then, when the first cooking mode is selected by operating the operation panel 66 and the cooking start button is pressed, the burner controller 67 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 12. When the time is up, the fry controller 65 sounds an alarm to notify the end of cooking. At this time, the combustion exhaust gas generated from the pulse combustor 12 moves through the exhaust pipes 35, 35 to the rear side of the oil tank 4, is discharged into the exhaust adapter 38 via the mufflers 36, 36, and is discharged forward from the exhaust adapter 38. In this way, when the exhaust gas passes through the mufflers 36, 36, the heat of the exhaust gas is transferred to the cooking oil inside the oil booster tank 40, which is in contact with the mufflers 36, 36. Therefore, the exhaust heat of the exhaust gas can be used to effectively increase the temperature of the cooking oil.

[0023] 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 40. Therefore, when the user operates the drop lever 43 to open the oil increase valve 42, the increased amount of cooking oil in the oil increase tank 40 is supplied to the oil vat 4 via the oil increase pipe 41. The oil increase tank 40 becomes empty. In this way, cooking oil is supplied up to the upper end (second oil amount) of second cooking section 8, and when burner controller 67 confirms through cooking temperature sensor 11 that the temperature of the cooking oil has reached the cooking temperature, fry controller 65 notifies the user by, for example, outputting a display indicating that cooking is OK on operation panel 66. When this notification is given, the user places a basket containing the second rated amount of food into oil vat 4. When the second cooking mode is selected on the operation panel 66 and the cooking start button is pressed, the burner controller 67 heats and cooks 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 65 sounds an alarm to notify the end of cooking. During cooking in each cooking mode, the oil-adding solenoid valve 52 is closed. Therefore, even if the oil level reaches the oil-adding port 51 when the food to be cooked is placed in the oil vat 4, the oil will not flow back to the oil-adding pipe 50.

[0024] On the other hand, during operation in the first and second cooking modes, the burner controller 67 monitors the detected temperature obtained from a tank temperature sensor (not shown) provided on the one-gallon can stand 45. Then, the burner controller 67 controls the ON / OFF of the heat retention heater so that a predetermined heat retention temperature is maintained in the one-gallon can 46. When the first and second oil surface temperature sensors 9, 10 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 67 drives the oil top-up pump 49 to open one or both of the oil top-up solenoid valves 52 of the corresponding oil tank 4. Then, the oil addition pump 49 is driven and the oil addition solenoid valve 52 is opened. Then, the cooking oil liquefied in the 18L can 46 is sucked through the oil addition pipe 48 and flows from the oil addition pump 49 through the oil addition pipe 50 to the oil addition port 51. Therefore, the cooking oil is supplied from the outlet of the oil addition port 51 down the top surface of the front wall into the oil vat 4.

[0025] In the fryer 1 of the above embodiment, a mesh body 20 is placed on the straight pipe sections 15A, 15C in the oil tank 4, and the mesh body 20 includes an outer frame 21 formed to match the horizontal cross-sectional shape inside the oil tank 4, a vertical bar 23 extending in the front-rear direction within the outer frame 21, and a horizontal bar 22 extending in the left-right direction within the outer frame 21. The vertical bars 23D1, 23D4 are disposed below the horizontal bar 22 in positions overlapping with the straight pipe sections 15A, 15C in a plan view, and when placed on the straight pipe sections 15A, 15C, the vertical bars 23D1, 23D4 support the mesh body 20 in line contact with the straight pipe sections 15A, 15C. With this configuration, when the mesh body 20 is placed on the tail pipe 14, the vertical bar 23D comes into line contact with the straight pipe portions 15A, 15C, and the horizontal bar 22 is prevented from coming into point contact with the straight pipe portions 15A, 15C. This distributes the stress applied to the tail pipe 14, preventing deformation or damage to the tail pipe 14.

[0026] The straight pipe sections 15A, 15C are arranged symmetrically in a plan view, and the vertical bars 23D1, 23D4 are arranged rotationally symmetrically so as to make line contact with the straight pipe sections 15A, 15C even if the mesh body 20 is rotated around a vertical imaginary axis A2 passing through the symmetry axis A1 of the straight pipe sections 15A, 15C and placed upside down. Therefore, the mesh body 20 can be placed without worrying about the front-to-back orientation, and in either case, the horizontal bar 22 can be prevented from making point contact with the straight pipe sections 15A, 15C. The vertical bar 23U4 is also disposed above the horizontal bar 22 at a position overlapping the straight pipe section 15C in a plan view, so that even if the mesh body 20 is rotated about the left-right imaginary axis A3 and placed upside down, it will make line contact with the straight pipe section 15C. Therefore, the mesh body 20 can be placed without worrying about the front and back, and in either case, the horizontal bar 22 can be prevented from making point contact with the straight pipe section 15C. The vertical bars 23U4, 23D1, and 23D4 are arranged symmetrically so as to make line contact with the straight pipe sections 15A and 15C even if the mesh body 20 is rotated around the symmetric axis A1 of the straight pipe sections 15A and 15C and placed upside down. Therefore, even if the mesh body 20 is inverted left and right, the horizontal bar 22 can be prevented from making point contact with the straight pipe sections 15A and 15C.

[0027] In this disclosure, the following modifications are possible: The shape of the net and the number and arrangement of the horizontal and vertical bars are not limited to the above-mentioned form. In particular, the number and arrangement of the vertical bars can be appropriately changed according to the position of the straight pipe portion of the tail pipe. Therefore, the vertical bars do not necessarily have to be arranged in rotational symmetry or bilateral symmetry. In the above embodiment, the two vertical bars are connected at their front and rear ends to form an elliptical shape in plan view, but the front and rear ends do not have to be connected, or conversely, the number of vertical bars connecting the front and rear ends may be increased. A plurality of vertical bars may be in contact with one straight pipe portion. In the above embodiment, when the mesh body is placed upside down, the upper bent portion of the outer frame is structured to abut on the straight pipe portion, but it may be structured so that the vertical bar abuts instead of the upper bent portion. Vertical bars may only be placed below horizontal bars.

[0028] In the above embodiment, the front and rear of the outer frame are placed on the combustion chamber and the cooking temperature sensor, and the vertical rod is placed on the straight pipe section to support the mesh body, but the front and rear of the outer frame may be eliminated and the vertical rod may be placed only on the straight pipe section to support the mesh body. In the above embodiment, a fryer in which two oil vats are arranged side by side is exemplified, but the present disclosure is also applicable to fryers in which one oil vat or three or more oil vats are arranged side by side. The present disclosure is also applicable to a structure in which a partition plate is provided in the center of each oil tank in the left-right direction to divide each oil tank into two separate oil tanks each having a pulse combustor. In this case, a mesh body is provided for each separate oil tank. [Explanation of symbols]

[0029] Reference Signs List 1··Fryer, 2··Body, 3··Frame, 4··Oil tank, 7··First cooking section, 8··Second cooking section, 12··Pulse burner, 13··Combustion chamber, 14··Tail pipe, 15 (15A to 15D)··Straight pipe section, 16··Bent pipe section, 20··Mesh body, 21··Outer frame, 22··Horizontal bar, 23 (23U, 23D)··Vertical bar, 25··Front and rear sides, 26··Left and right sides, 26··Recess, 27··Upper bent section, 65··Fry controller, 66··Operation panel, 67··Burner controller, F··Virtual plane, A1··Axis of symmetry, A2, A3··Virtual axes.

Claims

1. an oil tank for storing cooking oil; a pulse combustor disposed in the oil tank for heating the cooking oil; the pulse combustor has a combustion chamber and a serpentine tail pipe connected to the combustion chamber and through which combustion exhaust passes, the tail pipe having a plurality of straight pipe portions at a top position extending in a front-rear direction within the oil tank and parallel to each other, A fryer in which a net body is placed on the plurality of straight pipe sections in the oil tank, The net body has an outer frame formed to fit the horizontal cross-sectional shape of the inside of the oil tank; A vertical bar extending in the front-rear direction within the outer frame; A horizontal bar extending in the left-right direction within the outer frame, The vertical bars are arranged below the horizontal bars at positions overlapping the straight pipe section at least in a plan view, and when placed on the straight pipe section, the vertical bars are in line contact with the straight pipe section to support the mesh body, The vertical bar is also positioned above the horizontal bar at a position that overlaps with the straight pipe section at least when viewed in a plane, and the fryer is characterized in that the vertical bar supports the mesh body in line contact with the straight pipe section even when the mesh body is rotated around a virtual axis in the left-right direction and placed upside down.

2. The fryer described in claim 1, characterized in that the multiple straight pipe sections are arranged symmetrically in a planar view, and the vertical bars are arranged rotationally symmetrically so as to make line contact with the straight pipe sections even if the mesh body is rotated around a vertical imaginary axis passing through the symmetry axis of the straight pipe sections and placed upside down.

3. The fryer described in claim 1 or 2, characterized in that the multiple straight pipe sections are arranged symmetrically in a planar view, and the vertical bars are arranged symmetrically in line contact with the straight pipe sections even when the mesh body is rotated around the axis of symmetry of the straight pipe sections and placed upside down.

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