Flyer

Abstract

To improve maintainability by facilitating attaching / detaching a temperature sensor.SOLUTION: In a fryer, a temperature sensor 18 for cooking includes a thermistor joint 50 which is detachably mounted from an inner side of an oil tank 4 by externally fitting seal rings 67, 67 on a cylindrical fitting seat 40 fixed to a rear wall 4c of the oil tank 4 in a penetration state and opened in the oil tank 4. The thermistor joint 50 is assembled with a temperature detecting part 60 projecting into the oil tank 4, and a harness 62 with a connector 62a, connected to the temperature detecting part 60 and drawn to the outside of the oil tank 4 from the thermistor joint 50 via the fitting seat 40. The temperature detecting part 60 and the harness 62 can be drawn into the oil tank 4 by taking out the thermistor joint 50 from the fitting seat 40 into the oil tank 4.SELECTED DRAWING: Figure 9

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] In the fryer, a heating means such as a pulse burner is provided in an oil vat that contains cooking oil, and the cooking oil is heated to cook the food to be cooked. As disclosed in Patent Document 1, for example, the oil vat is provided with a temperature sensor such as a thermistor to detect the temperature of the cooking oil, and a controller controls the heating means based on the temperature detected by the temperature sensor. [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] Since the temperature sensor installed in the oil vat is installed so as to penetrate the oil vat from the outside, when removing the temperature sensor for maintenance such as repair or replacement, the work must be done from the outside of the oil vat. In this case, if the temperature sensor is installed at the rear of the oil vat, it is necessary to move the fryer or remove peripheral parts to secure a working space, which requires a lot of time and effort.

[0005] Therefore, an object of the present disclosure is to provide a fryer that can easily attach and detach a temperature sensor, thereby improving maintainability. [Means for solving the problem]

[0006] In order to achieve the above object, the present disclosure provides an oil tank for storing cooking oil, A heating means for heating cooking oil; A temperature sensor for detecting the temperature of cooking oil; A controller that monitors a detected temperature of the temperature sensor and controls the heating means, The temperature sensor includes a sensor joint that is fitted to a cylindrical mounting seat that is fixed in a penetrating state to a wall of the oil tank and opens into the oil tank, and that is fitted with a seal member so as to be detachably inserted from the inside of the oil tank; A temperature measuring part that protrudes into the oil tank and a harness with a connector that is connected to the temperature measuring part and is drawn from the sensor joint to the outside of the oil tank via the mounting seat are attached to the sensor joint, The temperature measuring unit and the harness can be pulled out into the oil tank by removing the sensor joint from the mounting seat into the oil tank. Another aspect of the present disclosure is characterized in that, in the above configuration, the temperature measuring unit and the harness pass through a mounting plug that is screwed into the sensor joint and are integrated into the mounting plug, and can be attached and detached to the sensor joint together with the mounting plug. Another aspect of the present disclosure is characterized in that, in the above configuration, the sensor joint is screwed into the mounting seat, and a polygonal head is formed on the end of the sensor joint facing the inside of the oil tank. Another aspect of the present disclosure is a method for manufacturing a semiconductor device comprising the steps of: The oil tank further includes a body for supporting the oil tank, and an operation unit provided on a front surface of the body and electrically connected to the controller, the heating means is a pulse combustor having a tail pipe in the oil tank, the tail pipe including a plurality of straight pipe sections extending in a front-rear direction and a plurality of bent pipe sections alternately connecting front and rear ends of the straight pipe sections, The temperature sensor is arranged on the rear wall of the oil tank so as to be located between the straight pipe sections when viewed from the front. Effect of the Invention

[0007] According to the present disclosure, since the temperature measuring unit and the harness are detachable from inside the oil tank, there is no need to move the fryer or remove peripheral parts when performing maintenance on the temperature sensor. This makes it easier to attach and detach the temperature sensor, improving maintainability. According to another aspect of the present disclosure, in addition to the above effects, the temperature measuring unit and harness are integrated into the mounting plug by passing through the mounting plug which is screwed into the sensor joint, and are detachable from the sensor joint together with the mounting plug. Therefore, the temperature measuring unit and harness can be easily attached and detached by attaching and detaching the mounting plug to the sensor joint. According to another aspect of the present disclosure, in addition to the above effects, the sensor fitting is screwed into the mounting seat, and a polygonal head is formed on the end of the sensor fitting facing the inside of the oil tank, making it possible to easily attach and detach the sensor fitting with a tool inside the oil tank, further improving maintainability. According to another aspect of the present disclosure, in addition to the above effects, the heating means is a pulse combustor having a tail pipe in the oil vat, the tail pipe including a plurality of straight pipe sections extending in the front-rear direction and a plurality of curved pipe sections connecting the front and rear ends of the straight pipe sections alternately, and the temperature sensor is disposed on the rear wall of the oil vat so as to be located between the straight pipe sections in a front view. Therefore, even if the tail pipe is disposed in the oil vat, the temperature measuring unit and the harness can be attached and detached between the straight pipe sections without any hindrance. [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. 2 is a perspective view of first and second oil surface temperature sensors. [Diagram 5] FIG. 4 is an exploded perspective view of the first oil surface temperature sensor. [Figure 6] 4A is a vertical cross-sectional view of the first oil surface temperature sensor, and FIG. 4B is a cross-sectional explanatory view showing the state in which the detection element portion has been removed. [Figure 7]FIG. 4 is an enlarged cross-sectional view of the portion of line AA in FIG. [Figure 8] FIG. 2 is an exploded perspective view of the cooking temperature sensor. [Figure 9] 1A is a longitudinal cross-sectional view of a cooking temperature sensor, FIG. 1B is a cross-sectional explanatory view showing the state where the thermistor joint is removed, and FIG. 1C is a cross-sectional explanatory view showing the state where the thermistor assembly is removed from the thermistor joint. [Figure 10] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 11] FIG. 2 is a perspective view of the fly controller portion without the cover. 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. 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 a pair of left and right pulse burners 9,9 are installed, and a first cooking section 7 and a second cooking section 8 above it. The first cooking section 7 is formed on the upper side of the bottom 6, and is a square tube whose opening area 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 upper end of the first cooking section 7.

[0010] Each pulse combustor 9 includes a combustion chamber 10 and a tail pipe 11. One end of the tail pipe 11 is connected to the left and right outer side surfaces of the combustion chamber 10. In the oil vat 4, the tail pipe 11 has a serpentine shape having a plurality of straight pipe sections 12, 12·· extending in the front-rear direction and semicircular curved pipe sections 13, 13·· connecting the front and rear ends of the straight pipe sections 12, 12 alternately. The left and right tail pipes 11, 11 are formed in the oil vat 4 so as to be mirror symmetrical. The other end of the tail pipe 11 is drawn out to the front side of the oil vat 4. A net body 14 is provided above the pulse combustors 9, 9 in the oil vat 4. A cover 15 that surrounds the outer periphery of the oil vat 4 is provided on the upper part of the frame 3.

[0011] 4, a first oil surface temperature sensor 16 is provided on the front wall 4a of the oil vat 4 in the first cooking section 7. A second oil surface temperature sensor 17 is provided on the side wall 4b of the oil vat 4 in the second cooking section 8. A cooking temperature sensor 18 is provided on the rear wall 4c of the oil vat 4 behind the pulse burners 9,9. The first oil surface temperature sensor 16 and the second oil surface temperature sensor 17 are each attached to a retaining cylinder 20 fixed from the outside to the front wall 4a and the side wall 4b. Since the attachment structure is the same for both sensors 16, 17, the first oil surface temperature sensor 16 will be explained as a representative example. 5 and 6(A), one axial end of the retaining cylinder 20 is fitted from the outside into a fitting hole 21 formed in the oil vat 4. A ring-shaped stopper portion 22 that abuts against the outer surface of the oil vat 4 in the fitted state is formed on the outer periphery of the one end. A flange portion 23 is formed on the other axial end of the retaining cylinder 20. A through hole 24 is formed inside the retaining tube 20, penetrating in the axial direction. The axial center of the through hole 24 is a small diameter section 25 where the opening area is the smallest. The stopper portion 22 side of the through hole 24 is expanded in diameter from the small diameter section 25 toward the fitting hole 21, and is expanded in diameter at one end portion. The flange portion 23 side of the through hole 24 is a seal section 27 with a diameter larger than the small diameter section 25 and smaller than the expanded section 26.

[0012] The first oil surface temperature sensor 16 includes a detection element portion 30 which is a thermistor, a positioning portion 31, and a harness 32. The detection element section 30 has a shaft shape that can be inserted into the small diameter section 25 of the holding tube 20, and has a spherical tip. The positioning section 31 is formed integrally with the base end of the detection element section 30, and is a plate-like shape that protrudes perpendicularly from the base end radially outward. A through hole 33 is formed in the positioning section 31. The harness 32 is connected to the detection element section 30 and is drawn out from the through hole 33. A connector 32a is provided at the end of the harness 32. The detection element unit 30, with the two seal rings 34, 34 attached to the base end side, is inserted into the through hole 24 from the seal portion 27 side of the retaining tube 20 until the positioning portion 31 abuts against the flange portion 23. Then, as shown in Fig. 6(A), the detection element unit 30 penetrates the small diameter portion 25 and the tip protrudes into the expanded portion 26, and the seal rings 34, 34 are pressed against the inner circumference of the seal portion 27, and the detection element unit 30 is inserted and attached in a sealed state.

[0013] In this state, the retaining tube 20 and the first oil surface temperature sensor 16 are clamped by a quick fastener 35. The quick fastener 35 is formed by folding a strip-shaped metal plate in half at the center and forming a clamping portion 36 in the middle of both ends so that they elastically abut against each other. From the clamping portion 36 to the end portion, a tapered portion 37 is formed which expands in the direction away from each other as it approaches the end portion, and from the tapered portion 37 to the end portion, it further expands in the direction away from each other. The clamping portion 36 is divided into a first clamping portion 36A having large-diameter semicircular shapes facing each other and a second clamping portion 36B having small-diameter semicircular shapes facing each other at both ends in the short side direction by punched holes 38, 38 formed at both ends. The tapered portion 37 is also divided into both ends in the short side direction by punched holes 38, 38.

[0014] The quick fastener 35, in a horizontal position with the first clamping portion 36A located between the stopper portion 22 and the flange portion 23 and the second clamping portion 36B located outside the harness 32, grips the center and presses the tapered portions 37, 37 against the retaining tube 20 and the harness 32, respectively, on the outside of the retaining tube 20 to which the detection element portion 30 is inserted and attached. Then, as shown in FIG. 4 and FIG. 6(A), the first clamping portion 36A and the second clamping portion 36B, which are expanded by the guide of the tapered portion 37, respectively clamp the retaining tube 20 and the harness 32. At this time, the positioning portion 31 abuts against the second clamping portion 36B in the punched holes 38, 38. Therefore, the detection element portion 30 is prevented from coming off the retaining tube 20 by the quick fastener 35. On the other hand, when the center portion of the quick fastener 35 is grasped and pulled in the direction away from the retaining tube 20, the clamping portions 36A, 36B are elastically deformed, and the quick fastener 35 can be removed directly from the retaining tube 20 and the harness 32. Therefore, as shown in FIG. 6(B), the detection element portion 30 can be pulled out from the retaining tube 20.

[0015] Next, the cooking temperature sensor 18 is disposed in the left-right center of the rear wall 4c (between the pulse burners 9, 9) as shown in Fig. 7. The cooking temperature sensor 18 is located between the straight pipe sections 12, 12 of the left and right tail pipes 11, 11 at the uppermost position of the oil vat 4 when viewed from the front. The cooking temperature sensor 18 is attached to a mounting base 40 attached to the rear wall 4c. As shown in Figures 8 and 9(A), the mounting seat 40 has a tubular portion 42 that is inserted from inside the oil vat 4 into a through hole 41 formed in the rear wall 4c and fitted therein. A female thread portion 43 is formed on the inner surface of the rear part of the tubular portion 42. A disk portion 44 is formed on the outer periphery of the front part of the tubular portion 42, which abuts against the rear wall 4c when the tubular portion 42 is inserted and fitted therein. A visor portion 45 that is arcuate in front view and protrudes forward is formed on the upper edge of the disk portion 44.

[0016] The cooking temperature sensor 18 includes a thermistor coupling 50 and a thermistor assembly 51 . The thermistor joint 50 is axially shaped so as to be insertable into the tubular portion 42 from the front. A male threaded portion 52 that screws into the female threaded portion 43 of the tubular portion 42 is formed at the rear of the thermistor joint 50. Ring-shaped grooves 53, 53 are formed in the front and rear on the outer periphery of the thermistor joint 50 in front of the male threaded portion 52. A head 54 that is a regular hexagon when viewed from the front is formed at the front end of the thermistor joint 50. An axial hole 55 is formed through the axial center of the thermistor joint 50. The axial hole 55 has a small diameter hole 56, which has the smallest diameter, at the center in the front-to-rear direction, and a medium diameter hole 57, which has a larger diameter than the small diameter hole 56, in front of it. Behind the small diameter hole 56 is a large diameter hole 58, which has a larger diameter than the medium diameter hole 57. A female thread portion 59 is formed on the inner surface of the rear portion of the large diameter hole 58.

[0017] The thermistor assembly 51 includes a temperature measuring portion 60 , a mounting plug 61 , and a harness 62 . The temperature measuring part 60 is rod-shaped and longer than the thermistor joint 50, and is formed with a diameter that allows it to be inserted into the small diameter hole 56 of the axial hole 55. A disk-shaped stopper 63 is formed at the rear of the temperature measuring part 60, the disk-shaped stopper 63 having a diameter larger than the temperature measuring part 60 and smaller than the large diameter hole 58 of the thermistor joint 50. A receiving washer 64 through which the temperature measuring part 60 passes is in contact with the front side of the stopper 63. The mounting plug 61 is a bolt-shaped shaft having a through hole 65 at its axis and a male thread portion 66 formed at its front portion. In the mounting plug 61, the rear end of the temperature measuring portion 60 is inserted into the through hole 65 from the front until the stopper 63 comes into contact with it. The harness 62 is connected to the rear end of the temperature measuring unit 60, and is drawn out from the rear surface of the mounting plug 61 through a through hole 65. A connector 62a is connected to one end of the harness 62.

[0018] In the thermistor assembly 51, with the temperature measuring part 60 inserted together with the stopper 63 into the axial hole 55 from the rear of the thermistor joint 50, the male threaded part 66 of the mounting plug 61 is screwed into the female threaded part 59 of the large diameter hole 58. Then, the temperature measuring part 60 passes through the small diameter hole 56 and the medium diameter hole 57, causing its front end to protrude forward of the thermistor joint 50. The thermistor joint 50 to which the thermistor assembly 51 is thus assembled is fitted with the grooves 53, 53, and the mounting plug 61 is inserted first into the cylindrical portion 42 of the mounting seat 40 inside the oil tank 4, and the male threaded portion 52 is screwed into the female threaded portion 43 of the cylindrical portion 42. Then, as shown in FIG. 9(A), the screwing is completed when the head 54 abuts against the front surface of the disk portion 44. At this time, the mounting plug 61 protrudes rearward from the cylindrical portion 42, and the seal ring 67 is assembled in a state of being in pressure contact with the inner circumference of the disk portion 44. The temperature measuring portion 60 of the thermistor assembly 51 is located below the eaves portion 45 of the mounting seat 40, protruding from the thermistor joint 50. The connector 62a of the harness 62 drawn out to the outside of the oil tank 4 is connected to a harness wired from the burner controller 116, which will be described later. On the other hand, when the head 54 of the thermistor joint 50 is rotated with a wrench or the like from within the oil vat 4, the male thread portion 52 is loosened and the thermistor joint 50 can be pulled out forward from the mounting seat 40, as shown in Figure 9(B). From here, when the mounting plug 61 is loosened, the thermistor assembly 51 can be removed from the thermistor joint 50, as shown in Figure 9(C).

[0019] 1 and 2, an air chamber 70 is provided on the outside of the front side of the oil vat 4. A mixing chamber (not shown) communicating with the combustion chambers 10 is provided inside the air chamber 70. A gas conduit 71 equipped with a gas solenoid valve 72 is connected to the mixing chamber to supply fuel gas. In addition, the mixing chamber is connected to an air supply pipe 73. The air supply pipe 73 is connected to a fan 74 provided at the rear bottom of the body 2, and air for combustion is supplied. The tail pipes 11, 11 drawn out to the outside of the oil vat 4 are connected to a pair of left and right exhaust pipes 75, 75 in the air chamber 70. The exhaust pipes 75, 75 are drawn out from the air chamber 70 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 76, 76 are provided at the upward downstream ends of the exhaust pipes 75, 75. The upper parts of the mufflers 76, 76 are covered from above by an exhaust pipe cover 77, and the upper ends of the exhaust pipes 75, 75 protrude into an exhaust adapter 78.

[0020] An oil reserve tank 80 for replenishing cooking oil to the oil vat 4 is housed inside the exhaust pipe cover 77 and in front of the mufflers 76, 76. The mufflers 76, 76 are in contact with the rear surface of the oil reserve tank 80. The oil tank 80 is connected to the oil vat 4 via an oil booster pipe 81 equipped with an oil booster valve 82. The oil booster valve 82 is a normally closed valve that is manually opened and can be opened from the front side using a drop-in lever 83. Therefore, when the oil booster valve 82 is opened using the drop-in lever 83, the cooking oil in the oil booster tank 80 can be replenished to the oil vat 4. However, cooking oil supplied in excess of the storage capacity of the oil booster tank 80 overflows from the front of the oil booster tank 80 and can flow into the oil vat 4 from an overflow port 84 provided on the upper rear end of the oil vat 4.

[0021] A 18L can stand 85 is provided below the right-side oil vat 4. The 18L can stand 85 is provided at the bottom of the vessel body 2 so that it can be pulled out forward. A 18L can 86 is provided on the 18L can stand 85 as an oil tank, and the 18L can 86 can be kept warm by a heater (not shown). A 18L can lid 87 is placed on the 18L can 86, and an oil-adding pipe 88 provided on the 18L can lid 87 is inserted into the 18L can 86. The top end of the oil-adding pipe 88 is connected to the suction side of an oil-adding pump 89. An oil-adding pipe 90 is connected to the discharge side of the oil-adding pump 89. The oil-adding pipe 90 branches out for each oil vat 4 and is connected to an oil-adding port 91 provided on the front wall of the second cooking section 8 of each oil vat 4 via an oil-adding solenoid valve 92.

[0022] A filtering tank 95 with a filter at its bottom is provided below the left-hand oil vat 4 at the bottom of the device body 2. Collecting pipes 97 are provided in the left-right direction above the filtering tank 95 and connected to oil drain pipes 96 (FIG. 3) provided at the bottom of each oil vat 4. The downstream end of the collecting pipe 97 is connected to the filtering tank 95, so that cooking oil in each oil vat 4 can be drained into the filtering tank 95 via the collecting pipe 97. Each oil draining pipe 96 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 98 provided on the front side. A filtering pump 100 is provided at the bottom of the vessel body 2. The suction side of the filtering pump 100 is connected to the bottom of the filtering tank 95 via a suction pipe 101. The discharge side of the filtering pump 100 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 102 and a second oil supply pipe 103. The first fuel fill pipe 102 is connected to the fuel filler pipe 81. The first fuel fill pipe 102 is provided with a first fuel fill valve 104 which is a normally closed valve. The first fuel fill valve 104 can be opened by manually operating a fuel fill lever (not shown) provided on the front side. The second fuel fill pipe 103 is connected to the lower rear surface of the oil tank 4. The second fuel fill pipe 103 is provided with a second fuel fill valve (not shown) which is a normally closed valve. The second fuel fill valve can also be opened by manually operating a fuel fill lever (not shown) provided on the front side.

[0023] A fry controller 105 is provided for each oil tank 4 at the upper front portion of the device 2. As shown in Figs. 10 and 11, the fry controller 105 has a housing 106 with a front surface tilted downward. A control board 107 is housed inside the housing 106. An operation panel 108 equipped with a display unit, operation buttons, etc. is provided on the front surface of the housing 106. A predetermined cooking mode and a maintenance menu can be set on the operation panel 108. A pair of locking pieces 109, 109 are provided on the left and right sides of the upper surface of the housing 106. Each locking piece 109 is a plate-like shape that rises upward, and a folded-back portion 110 that is folded backward is formed at the upper end. A left-right slit 111 is formed in the center of the folded portion of the folded-back portion 110 in the left-right direction. An upper portion of the front wall 4a of the oil vat 4 wraps around above the housing 106 and extends forward. A plate-shaped portion 112 that rises upward below the cover 15 is formed in the left-right direction at the upper end of the front wall 4a located above the housing 106. A pair of positioning pieces 113, 113 are formed facing upward on the left and right sides of the upper edge of the plate-shaped portion 112. The positioning pieces 113, 113 correspond to the slits 111, 111 of the locking pieces 109, 109.

[0024] The housing 106 is fixed to a support plate 115 installed in the left-right direction on the front surface of the frame 3 with screws via an attachment plate 114 that is inverted L-shape when viewed from the side and attached to the left and right of the lower surface. In this case, first, the left and right locking pieces 109, 109 are locked from above to the plate-shaped part 112 by aligning the slits 111, 111 with the positioning pieces 113, 113, respectively. Then, the folded parts 110, 110 are locked to the plate-shaped part 112, and the positioning pieces 113, 113 are inserted into the slits 111, 111, and the housing 106 is supported (temporarily fixed) by being suspended from the plate-shaped part 112. This temporary fixing position is the fixed position of the housing 106. Therefore, if the lower side of the housing 106 is lifted forward to provide a space behind it, work such as connecting the harness can be easily performed. When this work is complete, the mounting plate 114 is screwed to the support plate 115 while the housing 106 is left in the temporary fixing position, and the fixing is completed. A burner controller 116 (FIG. 1) is provided at the bottom of the appliance body 2. Detection signals from various sensors and the like are input to the burner controller 116. In accordance with instructions from the fry controller 105, the burner controller 116 controls the pulse combustor 9, the fan 74, 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.

[0025] 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 80 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 tank 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 108. Then, the burner controller 116 intermittently burns the mixed gas in the combustion chamber 10 to perform ON / OFF operation of the pulse burner 9. That is, the mixed gas is ignited in the combustion chamber 10 to cause it to explode and burn in the combustion chamber 10, and the combustion exhaust is forcibly discharged to the tail pipe 11 due to the increase in pressure in the combustion chamber 10 caused by the combustion. Then, fuel gas and combustion air are sucked into the combustion chamber 10, 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 tank 4.

[0026] Burner controller 116 monitors the detected temperature obtained from cooking temperature sensor 18. When the detected temperature reaches a predetermined cooking temperature (for example, 180 to 182°C), fry controller 105 issues a notification, such as by outputting a display indicating that cooking is OK on operation panel 108. When this notification is issued, 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 operation panel 108 and the cooking start button is pressed, burner controller 116 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 from pulse burner 9. When the time is up, fry controller 105 sounds an alarm to notify the end of cooking. At this time, the combustion exhaust gas generated from the pulse combustor 9 moves through the exhaust pipes 75, 75 to the rear side of the oil tank 4, is discharged into the exhaust adapter 78 through the mufflers 76, 76, and is discharged forward from the exhaust adapter 78. In this way, when the exhaust gas passes through the mufflers 76, 76, the heat of the exhaust gas is imparted to the cooking oil inside the oil booster tank 80, which is in contact with the mufflers 76, 76. Therefore, the temperature of the cooking oil can be effectively increased by utilizing the exhaust heat of the exhaust gas.

[0027] 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 80. Therefore, when the user operates the drop lever 83 to open the oil increase valve 82, the increased amount of cooking oil in the oil increase tank 80 is supplied to the oil vat 4 via the oil increase pipe 81. The oil increase tank 80 becomes empty. In this way, cooking oil is supplied up to the upper end of second cooking section 8 (second oil amount), and when burner controller 116 confirms through cooking temperature sensor 18 that the temperature of the cooking oil has reached the cooking temperature, fry controller 105 notifies the user by, for example, outputting a display indicating that cooking is OK on operation panel 108. 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 operation panel 108 and the cooking start button is pressed, burner controller 116 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, fry controller 105 sounds an alarm to notify the end of cooking. During cooking in each cooking mode, the oil-adding solenoid valve 92 is closed. Therefore, even if the oil level reaches the oil-adding port 91 when the food to be cooked is placed in the oil vat 4, the oil does not flow back to the oil-adding pipe 90.

[0028] Meanwhile, during operation in the first and second cooking modes, the burner controller 116 monitors the detected temperature obtained from a tank temperature sensor (not shown) provided on the one-gallon can stand 85. Then, the burner controller 116 controls the ON / OFF of the heat retention heater so that a predetermined heat retention temperature is maintained in the one-gallon can 86. When the first and second oil surface temperature sensors 16, 17 detect a reduction in the amount of cooking oil required in either the first or second cooking mode, or when a predetermined number of cooking cycles is reached, the burner controller 116 drives the oil top-up pump 89 to open the oil top-up solenoid valve 92 of the corresponding oil tank 4. Then, the cooking oil liquefied in the one-gallon can 86 is sucked in through the oil addition pipe 88 and flows from the oil addition pump 89 through the oil addition pipe 90 to the oil addition port 91. Therefore, the cooking oil is supplied from the oil addition port 91 into the oil tank 4, running along the upper surface of the front wall 4a.

[0029] When removing the first and second oil surface temperature sensors 16, 17 for maintenance, the quick fasteners 35 can be pulled at the center to remove them from the retaining tube 20 and the harness 32, as described above. Thus, the first and second oil surface temperature sensors 16, 17 can be pulled out of the retaining tube 20 for cleaning, replacement, etc. The first oil surface temperature sensor 16 is attached to the front wall 4a, and the second oil surface temperature sensor 17 is attached to the side wall 4b, both from the outside. Therefore, the first and second oil surface temperature sensors 16, 17 can be easily attached and detached by removing the front and side sides of the outer plate of the frame 3. Similarly, when removing the cooking temperature sensor 18, the head 54 of the thermistor joint 50 can be rotated with a wrench or the like from within the oil vat 4 from which the cooking oil has been drained as described above, and the thermistor joint 50 can be pulled out forward from the tubular portion 42. Thus, the thermistor assembly 51 can be removed from the thermistor joint 50 to replace the temperature measuring portion 60, etc. At this time, since the cooking temperature sensor 18 is located between the straight pipe portions 12, 12 when viewed from the front, the cooking temperature sensor 18 does not interfere with the tail pipe 11 when pulled out. When performing maintenance on the fly controller 105, simply removing the screws on the mounting plate 114 will place the housing 106 in a temporarily fixed state, suspended from the plate-like portion 112, and the housing 106 can be swung forward as described above to provide a working space behind it. This means that maintenance can be performed without removing the housing 106 or having to keep lifting it up.

[0030] (Effects of the disclosure related to the first and second oil surface temperature sensors) In the fryer 1 of the above embodiment, a fitting hole 21 (through hole) is formed in the front wall 4a and the side wall 4b of the oil vat 4, and a retaining cylinder 20 having a flange portion 23 at the end opposite to the fitting hole 21 is attached to the fitting hole 21 from the outside of the oil vat 4. The first and second oil surface temperature sensors 16, 17 are fitted with a seal ring 34 (sealing member) and are inserted into the retaining cylinder 20 from the outside of the oil vat 4 with their tips toward the fitting hole 21 side, and are equipped with a detection element portion 30 having a positioning portion 31 that abuts against the end on the flange portion 23 side in the inserted state, and a harness 32 with a connector 32a that is connected to the detection element portion 30 and drawn out to the outside of the retaining cylinder 20. With the detection element portion 30 inserted into the holding tube 20, the holding tube 20 and the harness 32 are simultaneously clamped across the flange portion 23 by a quick fastener 35 (fastener), and the detection element portion 30 and the harness 32 can be removed from the holding tube 20 by removing the quick fastener 35. According to this configuration, the detection element portion 30 and the harness 32 can be easily inserted into and removed from the retaining cylinder 20 by attaching and detaching the quick fastener 35. Therefore, the first and second oil surface temperature sensors 16, 17 can be easily attached and detached, improving maintainability.

[0031] In particular, since the retaining cylinder 20 and the first and second oil surface temperature sensors 16, 17 are disposed on the front wall 4a or side wall 4b of the oil vat 4, the quick fasteners 35 can be easily attached to and detached from the retaining cylinder 20 and the detection element unit 30 can be easily inserted and removed by removing the outer plate of the frame 3. This further improves maintainability. The first and second oil surface temperature sensors 16, 17 are provided in the first and second cooking sections 7, 8 in which the cooking oil is stored in the oil vat 4, and are used to detect the oil surface of the cooking oil. Therefore, the first and second oil surface temperature sensors 16, 17 are disposed in a relatively high position outside the oil vat 4, making them easy to attach and detach.

[0032] Modifications of the disclosure relating to the first and second oil surface temperature sensors will be described below. The shape of the through hole of the holding cylinder is not limited to the above. The expanded portion may be shallower or deeper than the above. The expanded portion may be eliminated so that the detection element portion protrudes inward beyond the wall of the oil tank. The shape of the detection element portion is not limited to the above. It may be longer or have a larger diameter than the above. The number of sealing members may be one or three or more. The positioning portion does not have to be plate-shaped. The shape of the quick fastener is not limited to the above-mentioned embodiment. It may be shorter in the short side direction, or the width of each clamping portion may be changed. The fastener is not limited to a quick fastener. A clip biased by an elastic member may also be used. A plurality of fasteners may be used. The first and second oil surface temperature sensors may be disposed in the center of the front wall, behind the side wall, or on other wall portions. In the above embodiment, two oil surface temperature sensors, a first and a second, are used, but the present disclosure can also be adopted in a case where there is only one oil surface temperature sensor. Conversely, three or more oil surface temperature sensors may be used. The temperature sensor of the present disclosure is not limited to being used for detecting the oil level, but can also be used for detecting the cooking temperature.

[0033] (Effects of disclosure regarding cooking temperature sensors) In the fryer 1 of the above embodiment, the cooking temperature sensor 18 (temperature sensor) is provided with a thermistor joint 50 (sensor joint) that is fitted to a cylindrical mounting seat 40 that is fixed in a penetrating state to the rear wall 4c of the oil vat 4 and opens into the oil vat 4, and that is fitted with a seal ring 67 (sealing member) so as to be detachable from the inside of the oil vat 4. The thermistor joint 50 is fitted with a temperature measuring part 60 that protrudes into the oil vat 4, and a harness 62 with a connector 62a that is connected to the temperature measuring part 60 and drawn from the thermistor joint 50 to the outside of the oil vat 4 via the mounting seat 40. The temperature measuring part 60 and the harness 62 can be drawn into the oil vat 4 by drawing the thermistor joint 50 out of the mounting seat 40. According to this configuration, the temperature measuring unit 60 and the harness 62 can be attached and detached from inside the oil vat 4, so there is no need to move the fryer 1 or remove peripheral parts when performing maintenance on the cooking temperature sensor 18. This makes it easier to attach and detach the cooking temperature sensor 18, improving maintainability.

[0034] In particular, the temperature measuring unit 60 and the harness 62 penetrate the mounting plug 61 which is screwed into the thermistor joint 50, and are integrated with the mounting plug 61, and are detachable from the thermistor joint 50 together with the mounting plug 61. Therefore, the temperature measuring unit 60 and the harness 62 can be easily attached and detached by attaching and detaching the mounting plug 61 to the thermistor joint 50. The thermistor joint 50 is screwed into the mounting seat 40, and a regular hexagonal (polygonal) head 54 is formed on the end of the thermistor joint 50 facing the inside of the oil vat 4. This makes it possible to easily attach and detach the thermistor joint 50 with a tool inside the oil vat 4, further improving maintainability. The heating means is a pulse combustor 9 having a tail pipe 11 including multiple straight pipe sections 12 extending in the front-rear direction and multiple curved pipe sections 13 connecting the front and rear ends of the straight pipe sections 12 alternately within the oil vat 4, and the cooking temperature sensor 18 is disposed on the rear wall 4c of the oil vat 4 so as to be located between the straight pipe sections 12, 12 when viewed from the front. Therefore, even if the tail pipe 11 is disposed within the oil vat 4, the temperature measuring section 60 and the harness 62 can be attached and detached between the straight pipe sections 12, 12 without any hindrance.

[0035] Modifications of the disclosed cooking temperature sensor will be described below. The shape of the sensor joint is not limited to the thermistor joint of the above form. For example, the position of the female screw part can be shifted, or the number of seal rings can be increased or decreased. The shape of the head is not limited to a regular hexagon, and may be another polygon such as a regular octagon. The mounting plug does not have to be screwed into the thermistor joint as in the above embodiment. For example, the mounting plug may be fitted with a seal member and inserted into and removed from the sensor joint. The shape of the thermistor assembly is not limited to the above embodiment. For example, the temperature measuring part may be larger in diameter or longer than in the above embodiment. If the sensor joint is short in the axial direction, the temperature measuring part may be shorter than in the above embodiment. In the above embodiment, in a fryer in which a pair of pulse burners are installed inside the oil vat, the cooking temperature sensor is disposed between the straight pipe sections of the left and right tail pipes, but even if one pulse burner is installed inside the oil vat, the cooking temperature sensor may be disposed between the straight pipe sections of one tail pipe. If the space between the straight pipe sections is narrow, a ratchet handle may be inserted between the straight pipe sections from above and the sensor joint may be rotated via a socket. The cooking temperature sensor is not limited to being located in the center of the rear wall of the oil vat in the left-right direction, but may be located to the right or left. The cooking temperature sensor may be located on a wall other than the rear wall. The temperature sensor of the present disclosure is not limited to being used for detecting cooking temperatures, but can also be used for detecting oil levels.

[0036] (Effect of disclosure regarding fly controller) In the above-described form of fryer 1, the fry controller 105 (operation unit) is provided on the front side of the body 2 and is electrically connected to the controller (burner controller 116), and includes a housing 106 that houses a control board 107. A locking piece 109 having a rearward folded portion 110 at its upper end is provided on the upper surface of the housing 106, while a plate-shaped portion 112 (locked portion) is provided on the side of the body 2 to which the folded portion 110 can be locked from above at a predetermined mounting position of the fry controller 105. With the folded portion 110 locked to the plate-shaped portion 112, the fry controller 105 is suspended and supported at the mounting position via the locking piece 109. According to this configuration, the fly controller 105 can be temporarily fixed in the mounting position, and the harness can be easily attached and detached, and the housing 106 can be easily fixed. This makes it easier to assemble the fly controller 105, and improves maintainability.

[0037] In particular, the locked portion is a plate-like portion 112 extending in the left-right direction, the plate-like portion 112 is provided with a positioning piece 113 protruding upward, and the folded-back portion 110 is formed with a slit 111 through which the positioning piece 113 passes when locked to the plate-like portion 112. Therefore, the fly controller 105 can be easily positioned in the left-right direction, and the assembly of the fly controller 105 can be further improved. The housing 106 has a shape that extends in the left-right direction, and a pair of locking pieces 109, 109 are provided on the left and right sides of the housing 106. Therefore, the housing 106 can be temporarily fixed in an accurate position without rattling or tilting.

[0038] Below, modified examples of the disclosure relating to the fly controller will be described. The locking pieces do not have to be a pair on the left and right, but three or more may be provided. Conversely, a single locking piece may be provided in the center of the casing in the left-right direction. The left-right width of the locking piece may also be changed as appropriate. The shape of the folded portion may also be changed, and may be a multiple claw shape. The folded portion may be formed in an inverted U shape. The engaging portion is not limited to a plate-like portion, and may be a narrow raised piece similar to the engaging piece. The engaging portion is not limited to a structure formed on the front wall of the oil vat as in the above embodiment. The engaging portion may be formed on another portion of the frame or the like as long as it is on the vessel body side. The shape of the housing is not limited to the above-mentioned form and can be modified as appropriate. For example, the front surface does not have to be an inclined surface, and the thickness from the front to the rear may be smaller than that of the above-mentioned form. The positioning piece and the slit may be provided on at least one of the multiple locking pieces (either the left or right in the above embodiment). Conversely, the positioning piece and the slit may be omitted.

[0039] Other examples of modifications common to each disclosure will be described below. In the above embodiment, a fryer in which two oil tanks are arranged side by side is exemplified, but the disclosures can also be applied to a fryer in which one oil tank or three or more oil tanks are arranged side by side. Furthermore, the disclosures are also applicable to a structure in which a partition plate is provided in the center of each oil tank in the left-right direction, dividing the oil tank into two separate oil tanks, each having a heating means. The heating means is not limited to a pulse combustor, but a burner or an electric heater may also be used. Each disclosure is also applicable to pressure fryers. [Explanation of symbols]

[0040] REFERENCE SIGNS LIST 1 fryer, 2 vessel body, 3 frame, 4 oil tank, 4a front wall, 4b side wall, 4c rear wall, 7 first cooking section, 8 second cooking section, 9 pulse burner, 10 combustion chamber, 11 tail pipe, 12 straight pipe section, 13 curved pipe section, 16 first oil surface temperature sensor, 17 second oil surface temperature sensor, 18 cooking temperature sensor, 20 holding tube, 21 fitting hole, 22 stopper section, 23 flange section, 24 through hole, 30 detection element section, 31 positioning section, 32, 62 harness, 32a, 62a··connector, 35··quick fastener, 36··clamping portion, 36A··first clamping portion, 36B··second clamping portion, 40··mounting seat, 42··tubular portion, 50··thermistor joint, 51··thermistor assembly, 54··head portion, 60··temperature measuring portion, 61··mounting plug, 105··fly controller, 106··casing, 107··control board, 108··operation panel, 109··locking piece, 110··folded portion, 111··slit, 112··plate-shaped portion, 113··positioning piece, 116··burner controller.

Claims

1. an oil tank for storing cooking oil; A heating means for heating cooking oil; A temperature sensor for detecting the temperature of cooking oil; A controller that monitors a detected temperature of the temperature sensor and controls the heating means, The temperature sensor includes a sensor joint that is fitted to a cylindrical mounting seat that is fixed in a penetrating state to a wall of the oil tank and opens into the oil tank, and that is fitted with a seal member so as to be detachably insertable from the inside of the oil tank; A temperature measuring part that protrudes into the oil tank and a harness with a connector that is connected to the temperature measuring part and is drawn from the sensor joint to the outside of the oil tank via the mounting seat are attached to the sensor joint, A fryer characterized in that the temperature measuring unit and the harness can be pulled out into the oil tank by removing the sensor joint from the mounting seat into the oil tank.

2. The fryer described in claim 1, characterized in that the temperature measuring unit and the harness are integrated into a mounting plug that is screwed into the sensor joint by passing through the mounting plug, and are detachable from the sensor joint together with the mounting plug.

3. 3. The fryer according to claim 1, wherein the sensor joint is screwed into the mounting seat, and a polygonal head is formed on an end of the sensor joint on the inside side of the oil vat.

4. A container for supporting the oil tank; An operation unit is provided on a front surface of the body and electrically connected to the controller, the heating means is a pulse combustor having a tail pipe in the oil tank, the tail pipe including a plurality of straight pipe sections extending in a front-rear direction and a plurality of curved pipe sections alternately connecting front and rear ends of the straight pipe sections, 4. The fryer according to claim 1, wherein the temperature sensor is disposed on a rear wall of the oil vat so as to be located between the straight pipe portions when viewed from the front.

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