JP2002112896A - Horizontal rotary cylindrical type continuous frying device of exhaust hot air introducing type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frying cooking device, which performs continuous processing, for improving problems that most of conventional frying devices are batch types which have low throughput, have problems on the aspect of a quality, require manpower, have low energy performance, require large installing spaces and have many other problems, and that a continuous frying machine transmits heat depending on only a direct contact with a cylindrical inner, which causes problems of throughput and scorching to an inner wall, etc. SOLUTION: This horizontal rotary cylindrical type continuous frying device of an exhaust hot air introducing type is obtained by arranging an exhaust hot air feeding line for introducing the exhaust hot air of combustion gas used for heating the outer peripheral surface of a cylinder at a horizontal rotary cylindrical type continuous frying device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to fried noodles, fried rice,
Stir-fried foods such as pilaf, scrambled eggs, goldfish, fried vegetables, and stir-fried onions, sofrits,
The present invention relates to a stirrer that continuously and efficiently performs stir-fry cooking as a pretreatment for meat, seafood, and the like.

[0002]

2. Description of the Related Art Conventionally, a stirrer which has been used as a pretreatment for stir-fried food and food production includes (1) a flat-pan-type stirrer with a stirrer, (2) a batch-type rotary stirrer,
(3) A batch type rotary stir fryer having a hot air outlet at the center of a round bottom and (4) a rotary continuous stir fryer in which protrusions are arranged in a spiral shape on the inner surface of a horizontal rotary cylinder are known. ing.

(1) A flat-pan stir-fryer with a stirrer is a stirrer that has been used most often in the past, and is a method in which the bottom of a pan is gas-fired and the stir-fry materials are mixed with a stirrer. Only the amount of stir-fry material that fits the capacity of the pot can be stuffed. If a large amount of stuffing is done at once, the temperature of the pot will drop sharply, and it will take time to recover the temperature. It may be in a state like this.

That is, in a batch stir-fryer, the temperature of the kettle drops sharply when the stir-fried material is stuck, so that the stir-fry cannot be stuck much at a time and the production capacity per unit is low. Further, in the batch type, since the heat load greatly changes at the start and end of the treatment, it is necessary to manually control the temperature of the wall surface. In addition, since the opening is large, the displacement of the hood is increased, and the air conditioning load is also increased. For mass production, a large number of pots must be arranged, which requires a large installation space.

(2) A batch-type rotary stirrer has a round bottom, an open top, and a cylinder having about one or two scraping blades on its inner wall, which is held at an angle so that the material does not spill. In this method, the outer periphery is heated by gas while the material is repeatedly scraped, dropped, dispersed, and mixed while being rotated, but has the disadvantage of being a batch type as in (1).

(3) A batch type rotary stirrer provided with a combustion gas or an outlet for hot air indirectly heated by the combustion gas at the bottom of the rotary drum is disclosed in Japanese Utility Model Laid-Open Publication No.
As described in JP-A-83323, although energy efficiency and processing quality are improved as compared with the above-mentioned (2) rotary stirrer, it also has the above-mentioned batch type defect. In addition, there is a problem that it is difficult to control the temperature of the hot air because the heat load changes greatly at the beginning and end of the process.

(4) A continuous food stirrer is disclosed in JP-A-6-189.
As proposed by Japanese Patent Application Laid-Open No. 855-855, a cylindrical drum is arranged in an inclined manner, an input port is provided in an upper opening, a discharge port is provided in a lower opening, and a projection is spirally formed on an inner peripheral surface of a copper portion. This is a stirrer that arranges, rotates the drum, heats the outer peripheral surface, and cooks continuously.Although the disadvantage of the batch type has been eliminated, heat transfer to the processing material relies only on the inner wall surface of the cylinder. As a result, the heat load per inner wall area is large, and the degree of scorching is naturally increased. In addition, steam is likely to be trapped in the cylinder structurally, and the water content of the material is difficult to evaporate.

[0008]

SUMMARY OF THE INVENTION The present invention aims at improving the disadvantages of the conventional batch stirrer and continuous stirrer described above.
By introducing combustion exhaust hot air into the horizontal rotary cylindrical continuous stirrer, it is possible to improve processing speed, achieve continuous long-time operation in large quantities, improve energy efficiency, improve the quality of stir-fried products, save labor and space. Attempt to achieve it.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the above-mentioned problems of the prior art and apparatus.
By introducing into the horizontal rotating cylindrical continuous stirrer the combustion exhaust hot air whose temperature and air volume can be changed over a wide range by adjusting means (damper) that adjusts the amount of air released into the hot air bypass line and the amount of fresh air introduced In addition to the conventional method of contact heat transfer with the wall surface of the kettle, a forced convection heat transfer effect by hot air is obtained, and it is found that the temperature of the stir-fry material is quickly raised, and evaporation and drying are accelerated. It was completed. According to the present invention, the effect is further promoted by bringing the hot air and the stir-fry material into opposite flows, so-called countercurrent contact. In addition, since it does not rely only on the contact heat transfer of the inner wall of the cylinder, the heat load per wall area can be reduced, the degree of scorching on the wall can be greatly reduced, and a long-time continuous operation can be performed. Furthermore, by using this high-efficiency, high-capacity stirrer and by continuous mass production, significant labor and space savings can be achieved. In addition, it is possible to reduce fuel consumption by effectively using the heat energy of the exhaust hot air,
In addition, since the local exhaust volume by the hood is reduced by minimizing the opening, the air conditioning load can be reduced, and as a result, significant energy saving can be achieved. In terms of quality as well, the hot air effect allows the moisture of the treated product to be efficiently blown off in a short time, and a high-quality stir-fried product can be obtained without being dipped in drip. Regarding the variability of the operating conditions of this device,
1) Free roasting time can be set by changing the rotation speed and tilt angle of the horizontal cylinder. 2) The wall surface temperature of the cylinder can be changed depending on the amount of gas combustion. 3) If necessary, for each horizontal region The temperature zone of the inner wall surface can be changed. 4) The temperature and the flow rate of the hot air introduced into the cylinder can be changed over a wide range depending on the amount of hot air released into the bypass of the adjusting means and the amount of fresh air introduced. By selecting a wide range of operating conditions according to 1) to 4) above, it is possible to perform a so-called versatile operation suitable for the material, the processing flow rate or the degree of scorching.

[0010] That is, the invention according to claim 1 is a horizontal rotatable cylindrical continuous stirrer, wherein an exhaust hot air supply line for introducing exhaust heat of combustion gas used for heating the outer peripheral surface of the cylinder into the cylinder is provided. This is a horizontal rotatable cylindrical continuous stirrer with exhaust hot air introduction, characterized by the fact that the hot air of the combustion gas used for heating is brought into direct contact with the processing material and exerts a forced convection effect, thereby stir-friing the material. To increase the processing capacity, improve the quality by stir-fry without drip (leaching of water from the stir-fry material), and enable long-term continuous operation by reducing scorching on the inner wall of the cylinder. It is intended to improve thermal efficiency and achieve labor saving and space saving.

According to a second aspect of the present invention, the exhaust hot air supply line is stir-treated so that the exhaust hot air introduced into the rotating cylinder is oriented in a direction opposite to the direction in which the stir fry material is transferred, and the hot air supply line is brought into countercurrent contact with the stir fry material. 2. The horizontal rotating cylindrical continuous stirrer according to claim 1, wherein the exhaust hot air is introduced into the processing material in a countercurrent flow, and is connected to the discharge end side. The effect of accelerating the temperature rise and evaporation is greater than that of the flow contact, and the improvement effect of the invention of claim 1 is further enhanced.

According to a third aspect of the present invention, the exhaust hot air supply line is connected to dampers for adjusting the amount of air discharged to the exhaust hot air bypass line and the amount of fresh air introduced, respectively. The temperature and amount of hot air to be introduced into the apparatus are set in a horizontal cylindrical rotary continuous stirrer of the exhaust hot air introduction type according to claim 1, wherein the exhaust hot air to be introduced is discharged to a bypass line. The temperature and amount of hot air passing through the cylinder can be varied over a wide range by adjusting means for adjusting the amount of fresh air introduced, that is, the degree of opening of the damper.

According to a fourth aspect of the present invention, there is provided a heating means in which the ratio of the effective length in the horizontal direction to the inner diameter of the horizontal rotary cylinder is 3 or more, and combustion adjusting means for heating the outer peripheral surface immediately below the horizontal rotary cylinder is added. 2. The method according to claim 1, wherein each of the regions is provided in three or more sections in the lateral direction of the cylinder, and the combustion load is adjusted for each of the regions to individually set the temperature zone of the inner wall surface of the cylinder. It is a horizontal rotating cylindrical continuous stirrer of the exhaust hot air introduction type described in the description.In a so-called sufficiently long rotating cylinder, the temperature of the inner wall is somewhat matched to the amount of gas combustion on the nearest outer wall due to the heat conduction. become,
If the combustion amount is changed for each area, different temperature zones can be set. For example, in the region I shown in FIG. 1 of the later-described embodiment, the average temperature of the inner wall is 230 ° C. by high heat, the temperature of the inner wall is 190 ° C. by low heat in the region II, and 210 ° C. by medium heat in the region III. It is possible to select a wide temperature range according to a temperature range in which burning can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to FIGS. 1 and 2, equipment-related conditions relating to a continuous rotating rotatable cylindrical stirrer of the present invention will be described. FIG. 1 is a view showing the configuration of a horizontal rotatable cylindrical continuous stir fryer according to one embodiment of the present invention, and FIG. 2 is a side view of a part of the continuous stir fryer.

The horizontal cylinder 5 is made of a metal material having sufficient thickness and sufficient thermal conductivity (for example, steel material, steel material, etc.) for preventing local scorching and performing average heating without unevenness.
Copper-based materials, stainless steel, etc.)
In addition, the inner surface of the cylinder is preferably mirror-finished as much as possible in consideration of washing properties and prevention of scorching, or Teflon coating, Teflon impregnation treatment, thermal spraying of metal powder, etc. to enable continuous operation for a longer time. Surface treatment is an effective method.

On the inner wall of the cylinder, scraping blades 6 having a height of about 3 to 15 cm for scraping the processing material are mounted in two or more stages in the horizontal direction and one or more in the circumferential direction. If necessary, the scraping blade 6 may be provided with an angle for feeding the material to the discharge side, or may be fixed so that the blade angle can be changed. In addition, when frying a material that tends to be in a dumpling state during rotation, mixing, and transfer, such as rice, etc., adjust the loosening grid 7 or an alternative thereto according to the dropping position as shown in FIG. It is preferable to attach

The cylinder is installed so as to have a slightly downward gradient (1/20 to 50) toward the discharge side (however, this is not the case when the material feed angle is provided on the scraping blade 6), and the speed is variable. Is rotated by the driving device 9. The residence time of the processing material in the cylinder, the so-called stir time, can be changed by the inclination angle and the number of rotations of the cylinder.

In consideration of the efficiency of continuous operation, the ratio between the lateral length and the inner diameter of the cylinder is preferably 3 or more.

At least three gas burners capable of adjusting combustion are arranged in the lateral direction, and in the circumferential direction, one to three gas burners around the outer periphery, mainly around the bottom, of the rotary cylinder. This allows the heat load to be adjusted in small increments.

Further, as shown in FIG. 1 of the embodiment, it is preferable to divide the gas supply pipe into regions in the lateral direction of the cylinder and to provide a gas combustion regulating valve or a means instead of the gas combustion control valve for each section.

A plurality of radiation thermometers 1 are provided on the outer wall of the rotating cylinder.
One or an alternative temperature measuring means is provided to control and monitor the temperature of the outer wall.

A hot air cover 16 also serving as a heat insulating material is disposed around the rotary cylinder as shown in FIG. 2 of the embodiment, and the combustion gas rises in the flow path between the outer wall of the cylinder and the cover. 17 is connected. After the duct 17 is branched off from the hot air bypass line 19, the duct 17 enters the smoke dust removal filter 21, and then joins with the fresh air to supply the exhausted hot air so as to be introduced into the cylinder from the discharge end side of the processed product. Line A is provided. Note that the position of the branch, the position of the filter, and the position of the fresh air introduction are not so particular in the order.

The hot air bypass line 19 and the fresh air inlet are respectively provided with dampers 20 and 22 for adjusting the flow rate.
Alternatively, an alternative means is provided, and the temperature and the amount of hot air introduced into the cylinder are set by adjusting the means.

The introduction of hot air in a continuous system has never been introduced, and unlike a system of a batch system in which the amount of water evaporation differs due to a rise in the material temperature, moisture can be controlled stably. In addition, it is possible to reduce quality unevenness.

The exhaust air from the material charging end enters the exhaust gas purifier 25 together with the hot air bypass line 19 and is discharged to the atmosphere via the exhaust fan 26.

In a series of hot air lines, 3 to 5 thermometers 1
8 is arranged to control and monitor the temperature of the hot air.

The material to be processed is a material input chute 4
Alternatively, it is supplied to the inside of the rotating cylinder via a charging means such as a screw feeder instead.

The material is swept up by the swirling blades 6, falls, disperses, comes into contact with the inner wall, mixes, and proceeds to the discharge side while repeating this and in forced convection with hot air.

The processed product is discharged via the processed product discharge chute 8 or an alternative means.

When cooking oil is used for stir-fry cooking, the oil is supplied into the cylinder by the oil injection pump 3 or an alternative means.

A front door 23 is arranged on the processed product discharge end side of the cylinder, and is opened when cleaning and inspecting the inside of the cylinder.

The horizontal rotary cylinder 5, the drive unit 9, the combustion gas burner 12, the heat insulating cover 16, the hot air bypass damper 20, the fresh air damper 22, the hot air bypass line 19, the raw material input chute 4, and the processed product discharge chute 8 , Front door 23, exhaust hood 24, thermometer 11, 1
8 and the like are preferably installed on the same mount as much as possible, so that when changing the tilt angle of the rotating cylinder, it is only necessary to change the tilt angle of the mount, and for the above-mentioned accessory equipment mounted on the mount, That is fine.

Means for easily changing the inclination angle of the gantry,
For example, it is more preferable to provide a jack 28 or a screw with a handle.

In order to burn off the inner wall of the cylinder after continuous operation for a long time, use high-pressure water generated by a plunger pump having a pressure of about 10 to 20 megapascals.
If it is connected to a jet gun and the cylinder is rotated and the jet gun is mounted on a continuous feeder and sprayed onto the wall, it can be cleaned cleanly with little manual work.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings shown in the embodiments, but some of the conditions of the apparatus described in the preceding section will be omitted. Note that the present invention is not limited to this.

The various materials to be treated are mixed together with the edible oil to be used in the raw material supply machine 1 and are quantitatively supplied to the raw material charging chute 4. On the other hand, the edible oil is supplied from the oil supply tank 2 by the oil supply pump 3 to the charging chute 4 directly from the fixed quantity feeder 1 or the edible oil supply line. Next, the material and the edible oil enter the raw material input end side of the horizontal rotary cylinder 5.

The material that has entered the rotating cylinder 5 that has been heated to a predetermined temperature in advance is scraped up by the scraping blades 6 and falls.
Dispersion, contact with the inner wall of the can, and mixing are repeated all the way to the treated product discharge end. The residence time of the material is determined by the inclination angle of the cylinder and the rotation speed of the cylinder.

In the case of processing an object that easily becomes a dumpling, such as rice, the loosening grid 7 is attached to a position where the material falls.

The material in the rotating cylinder is always in direct contact with the hot air introduced from the discharge end of the processed product, and so-called countercurrent forced convection heat transfer is performed. This forced convection heat transfer efficiently promotes the temperature rise of the material and the evaporation of moisture.

The material in the inside of the cylinder is fried by the effect of hot air with almost no immersion in the drip, so that a so-called high-quality fried product is produced.

The processed product discharged from the discharge end side is transported to a predetermined place by a processed product transport conveyor or the like via a processed product discharge chute 8.

The rotating cylinder 5 uses a drive device capable of shifting, and transmission to the cylinder is performed by a driving gear 9.
On one side, a receiving rotary roller 10 is provided.
The rotating cylinder 5 has a slight downward gradient toward the discharge side of the processed product.

A plurality of three or more gas burners 12 are arranged laterally around the outer periphery of the rotary cylinder, mainly around the bottom, and the rotary cylinder 5 is heated by the gas burners.

Gas burners 12 arranged in a plurality in the horizontal direction
Is divided into three regions in the lateral direction, and a combustion control valve 13 is provided for each of the three regions. This regulating valve 1
3, the temperature zone of the inner wall of the cylinder can be changed for each area. This allows operation in the lateral temperature range most suitable for the material.

A combustion air supply port 14 and a combustion state inspection port 15 are provided around the gas burner 12.

The combustion gas of the gas burner 12 passes through the flow path between the heat insulating cover 16 and the outer wall of the cylinder 5, rises to the top while applying heat to the cylinder, and is connected to the duct 17.

Next, the hot air is branched into a hot air bypass line 19 and enters a dust filter, where soot is removed. The hot-air bypass line 19 is provided with a damper 20 for adjusting the flow rate.

The hot air that has exited the dust removal filter 21 is then mixed with fresh air and introduced into the processing cylinder discharge end of the rotating cylinder. The flow rate of the fresh air is adjusted by the damper 22.

The temperature and the amount of hot air introduced into the rotary cylinder can be set in a wide range depending on the amount of air released to the hot air bypass line (depending on the opening of the damper 20) and the amount of fresh air introduced (depending on the opening of the damper 22).

The hot air introduced into the cylinder travels toward the material charging end while conducting forced convection heat transfer with the material, collects in the exhaust hood 24, and then joins the hot air bypass line 19. , To the exhaust gas purifier 25.

In the wet exhaust gas purifier 25, oily smoke is removed, and moisture is added. The water is sucked into the exhaust fan 26 and discharged to the atmosphere.

A radiation thermometer 11 is used for measuring the outer wall temperature of the cylinder.
And several hot air thermometers 18 are attached to perform temperature control and monitoring.

The present apparatus is adapted to the properties of the material, such as the degree of thermal denaturation, water content, and ease of burning, and to the processing flow rate, the number of rotations, convection time, combustion load, the temperature of the inner wall of the cylinder, and the lateral direction of the inner wall of the cylinder. The system can freely change the temperature range of the area, the temperature of hot air, the amount of air, etc., and a wide range of operation is possible.

On the discharge side of the processed product, there is provided a front door 23 used at the time of washing in the cylinder and at the time of inspection.

On the other hand, the main mount 27 is equipped with a drive device for the horizontal rotary cylinder 5 and its related devices, a gas combustion device, a hot air device, etc., and the tilt angle of the cylinder is adjusted by an angle adjusting jack 28.

[0056]

According to the present invention, the temperature rise and evaporation of the material are greatly improved by using a horizontal rotating cylindrical continuous stirrer to introduce exhaust hot air from the gas combustion into the cylinder and to make forced convection contact with the treated product. The drastic improvement of processing capacity, high-quality stir-fry hardly dipped in drip, continuous operation for a long time by reduction of scorch, energy saving and space saving were achieved. In addition, the present apparatus has a mechanism in which the temperature of hot air, the amount of air, the temperature of the inner wall of the cylinder, and the like can be changed to a high range, and a wide range of operation can be performed according to the properties of the processing material and the processing flow rate.

[Brief description of the drawings]

FIG. 1 is a view showing a configuration of a continuous stir-fry apparatus according to one embodiment of the present invention.

FIG. 2 is a side view in which a part of the continuous stirrer is sectioned.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Material supply machine 2 ... Oil supply tank 3 ... Oil supply pump 4 ... Material supply chute 5 ... Horizontal rotary cylinder 6 ... Raising blade 7 ... Unraveling grid 8 ... Treated product discharge chute 9 ... Cylindrical drive gear 10 ... Rotary roller DESCRIPTION OF SYMBOLS 11 ... Radiation thermometer for outer walls 12 ... Gas burner 13 ... Combustion regulating valve 14 ... Combustion air supply port 15 ... Combustion state inspection port 16 ... Heat insulation cover 17 ... Duct 18 ... Hot air thermometer 19 ... Hot air bypass line 20 ... Bypass Damper 21 ... Smoke dust filter 22 ... Damper for fresh air 23 ... Front door 24 ... Hood for exhaust air 25 ... Exhaust gas cleaner 26 ... Exhaust fan 27 ... Main frame 28 ... Jack for adjusting the inclination angle 29 ... Conveyor for processed products

Claims (4)

[Claims] In a horizontal rotatable cylindrical continuous stirrer, an exhaust hot air supply line for introducing exhaust hot air of combustion gas used for heating the outer peripheral surface of the cylinder into the interior of the rotary cylinder is provided. Introducing horizontal rotating cylindrical continuous stirrer. 2. The exhaust hot air supply line is connected to the stir-fed food discharge end side so that the exhaust hot air guided into the rotating cylinder is oriented in the opposite direction to the transfer direction of the stir fry material, so that the stir fry material and the exhaust hot air come into countercurrent contact. 2. The horizontal rotating cylindrical continuous stirrer of claim 1, wherein the exhaust hot air is introduced. 3. The exhaust hot air supply line is connected to dampers for adjusting the amount of air discharged into the exhaust hot air bypass line and the amount of fresh air introduced, and the temperature of the hot air introduced into the cylinder according to the degree of opening. The horizontal cylindrical rotary continuous stirrer of the exhaust hot air introduction type according to claim 1, wherein an air volume is set. 4. A heating means provided with a combustion adjusting means for heating an outer peripheral surface immediately below the horizontal rotary cylinder, wherein the ratio of the effective length in the horizontal direction of the horizontal rotary cylinder to the inner diameter of the cylinder is 3 or more. 2. The exhaust hot air introduction type according to claim 1, wherein each of the three or more sections is separately provided, and a combustion load is adjusted for each section to individually set a temperature zone of the inner wall surface of the cylinder. Horizontal rotating cylindrical continuous stirrer.