JPH02200222A - Food fryer - Google Patents

Abstract

PURPOSE:To separate oil more completely and to shorten a necessary processing time by rotating a basket while food being completed frying processing is irradiated with a microwave. CONSTITUTION:A microwave oscillator 51, which generates the microwave of 1900-2450MHz, is communicated through a waveguide 52 into a frying tank 1 in the opening of an upper part. In such a food fryer, the desired food is put into a basket 22 and the frying tank 1 is blocked internally with air tight. Pressure is reduced by a vacuum pump 38 and the edible oil in an oil feeding and discharging tank 30 is supplied through an oil feeding and discharging pipe 31d. Then, the oil is heated to a necessary frying temperature by a steam discharge pipe 28 and the basket 22 is rotated at low speed such as 5rpm by a motor 8. When the frying oil is prepared, the edible oil is collected to the oil feeding and discharging tank 30 and the inside of the frying tank 1 is irradiated with the microwave from the microwave oscillator 51. While the fried product in the basket 22 is heated to the inner deep part of the product, the basket 22 is rotated at high speed in the measure of 1000rpm by driving the motor 8, and the edible oil included in the fried product is separated and removed by centrifugal force.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for frying various foods in one edible oil.

[Prior Art] Vacuum frying devices have been known that fry foods under reduced pressure to promote evaporation of moisture and make the fried products lighter in taste. In addition, Japanese Patent Laid-Open No. 62-220159 discloses a frying method in which the food is placed in a wire mesh basket at the same time as the pressure is reduced, and the food is fried while rotating in the heated cooking oil, thereby achieving even and efficient vacuum-frying. It is disclosed in Japanese Patent Application Laid-Open No. 62-248462.

[Background of the Invention] Recently, consumer preference for fried tofu products has shifted to low-calorie products with less oil, but fried tofu products cooked in conventional vacuum fryers have an oil content of 20%.
Since it leaves a lot of water, it is high in calories and tastes oily, so it does not meet consumer needs.

[Object of the Invention] The present invention has been made in view of the above, and its first purpose is to more completely separate and remove residual oil from fried products, thereby providing fried products that meet the needs of consumers. This is what we are trying to do.

A second object of the present invention is to shorten the time required for frying and to efficiently produce fried products.

[Means for Achieving the Object] In order to achieve the above object, the food fryer of the present invention includes a frying tank provided with an airtight lid that can be opened and closed, and a frying tank that rotates within the frying tank by the immediate action of a motor. a food storage basket supported as such, an oil supply/drain means for supplying cooking oil to the frying tank and removing cooking oil from the frying tank, and a vacuum pump for reducing the pressure inside the frying tank; It is characterized by comprising a microwave oscillator that irradiates microwaves into the oil tank.

C action] After frying food in a basket while rotating it under reduced pressure in a deep-frying tank, the cooking oil is removed from the deep-frying tank, and the basket is rotated while irradiating the fried product with microwaves. For example, centrifugal force acts on the edible oil contained in the fried product while maintaining its fluidity through microwave heating, making it possible to remove residual oil more completely in a short period of time. Furthermore, by irradiating microwaves during frying, it is possible to efficiently heat the central part of the fried product, which is difficult to dry, and the drying time can be significantly shortened.

[Example] Next, an example of the food fryer of the present invention will be described with reference to the drawings.

The frying tank 1 includes a bottomed cylindrical main body 1 a supported laterally on a pedestal 2 and an opening/closing lid 1 b provided on a movable table 3 . A rotating shaft 6 passes through the center of the bottom of the main body 1a with a bearing 41 and a seal 5 interposed therebetween, and a clutch member 7 is provided at the inner end of the rotating shaft 6 in the main body la.
It is connected to a reducer 9 of a motor 8 installed above.

10 is a bearing for the rotating shaft 6. On the other hand, the movable platform 3 is equipped with wheels 54 so as to be able to run on the bottom rail 53 of the pedestal 2, and the cover 1b is coaxially supported by a support shaft 12 on a bearing 11 provided at the top of the movable platform 3. Supported. A worm wheel 13 is provided on the support shaft 12, and a worm 14 that meshes with the worm wheel 13 is attached to a handle 15.
It is provided on the handle shaft 16 which is provided at one end. Then, when the handle 15 is operated to rotate the worm 14, the worm wheel 13. Open/close lid 1b via support shaft 12
rotates and the opening/closing bib is horizontal.

Alternatively, it may be directed downward as shown by the imaginary line in FIG. As shown in FIG. 2, the bottomed out part 19 of the center shaft 18 is fixed to a circular plate 25 fixed at the center of the opening/closing lid 1b with a screw 17, thereby fixing the central shaft 18 to the opening/closing lid 1b. There is. A cylindrical body 20 is rotatably supported on the outer periphery of the central shaft 18 via bearings 26 and 27, and a clutch member 21 that engages with the clutch member 7 is fixed to the tip of the cylindrical body 20. A cylindrical basket 2 is placed on the outer periphery of the cylinder body 20.
2 will be provided. The basket 22 is made of a plastic net so that microwaves can pass therethrough, and the inside thereof is partitioned by a radial partition net 23. A lid member 24 is fixed to one end of the basket 22 so that it can be opened and closed when food is loaded into the basket 22.

28 is a steam heat dissipation tube provided inside the main body la.

The opening/closing lid 1b is attached to the main body 1a and the band 29 is tightened around the outer periphery of the joint so that the opening/closing lid 1b can be airtightly attached to the main body 1a. In the installed oil supply and drainage tank, the wandering oil tank 30 and the oil tank 1 are connected to a plurality of vertical oil supply and drainage pipes 31.
a, 31d and the respective oil supply/drainage pipes 31a, 31d are piped so as to be able to communicate through valves 32a, 32d provided in the middle thereof, respectively. Note that the wandering oil supply pipe 31d hangs down to the bottom of the wandering oil supply tank 30. Reference numeral 33 denotes a steam heat dissipation pipe disposed within the oil supply/drainage tank 30.

Fig. 4 shows a piping system diagram of this food fryer.
Edible oil such as palm oil can be supplied to 0. Reference numeral 37 indicates a valve provided at the drain 55 of the oil supply/discharge tank 30, 38 indicates a vacuum pump, 39 indicates an oil mist separator provided at the intake port of the condenser 40, and 40 indicates a valve provided at the intake port of the vacuum pump 38. It is a condenser. condenser 40
Cooling water is constantly supplied to the vacuum pump 38 and the intake pipe 41
The intake pipe 41 is designed to condense evaporated water and maintain the degree of vacuum by cooling the intake air.The intake pipe 41 branches into two directions, one of which is connected to the oil tank 1 via a valve 42.
communicate with.

The other side communicates with the wandering oil tank 30 via a valve 43. Reference numeral 44 represents a valve that opens the inside of the oil tank 1 to atmospheric pressure, and 45 represents a valve that opens the inside of the oil supply tank 30 to atmospheric pressure.

Further, 46 is a steam generator, and its steam pipe 47 is branched into two directions, one of which communicates with the steam radiation pipe 28 via the temperature control valve 56, and the other communicates with the steam radiation pipe 28 via the temperature control valve 48. It communicates with the steam heat radiation pipe 33.

This temperature control valve 56. The temperature control valves 48 are connected to the frying tank 1, respectively. The oil temperature measuring devices 49 and 50 provided in the oil supply/drainage tank 30 operate to maintain the oil temperature in the oil frying tank 1 and the oil supply/drainage tank 30 at a required value.

Reference numeral 51 denotes a microwave oscillator that generates microwaves of 1,900 to 2,450 MHz, and the microwave oscillator 51 communicates with the oil tank 1 through a waveguide 52 from its upper opening.

Therefore, in this food fryer, desired food is placed in the basket 22 and the basket 22 is inserted into the main body la by traveling on the moving platform 3, and the clutch member 21
is attached to the clutch member 7, the opening/closing lid 1b is attached to the open end of the main body 1a, and the band 29 is fastened, thereby airtightly closing the inside of the frying tank 1. Then, the valve 44 is closed, the valve 42 is opened, and the air inside the oil tank 1 is sucked by the vacuum pump 38, and the valve 32d and the valve 45 are opened to pass the oil supply and drainage pipe 31d through the oil supply and drainage tank 3.
0 of cooking oil is supplied into the frying tank 1. Then, the valve 32d is closed, and the edible oil is heated to a desired hot water temperature by the steam radiation pipe 28, and the basket 22 is rotated by the motor 8 at a low speed of about 5 rpm. At this time, the inside of the fried tofu tank 1 is constantly suctioned by the vacuum pump 38 to maintain a reduced pressure of about -700 mmHg (gauge pressure).This reduced pressure promotes the evaporation of water in the food. When the fried tofu is completed in this way, the edible oil in the fried tofu tank 1 is collected into the oil supply/drainage tank 30. Valve 3 for that
When 2a and 32d are opened, the valve 45 is closed, and when the valve 43 is opened, the pressure inside the wandering oil tank 30 is reduced by the vacuum pump 38, causing the cooking oil in the frying tank 1 to flow into the wandering oil tank 30. At this time, the inside of the fried oil tank 1 is maintained in a reduced pressure state. Then, the microwave oscillator 51 irradiates the inside of the frying tank 1 with microwaves, and while the fried products in the basket 22 are heated deep inside by the microwaves, the basket 22 is rotated at a high speed of about 000 rpm by the drive of the motor 8 and centrifuged. The edible oil contained in the fried product is separated and removed by force. At that time, the edible oil in the fried product is heated deep inside by microwaves, reducing its viscosity (increasing its fluidity), so the centrifugal action works well, and just by operating it for a few minutes, the oil content in the fried product can be reduced by 10%. It can be reduced to less than %. When the oil is drained in this way, the pressure inside the frying tank 1 is restored to atmospheric pressure, the band 29 is released, the movable platform 3 is moved backward, and the opening/closing lid 1b is opened. Then, the basket 22 is rotated downward about the spindle 12 and the fried oil product is taken out onto the box 57. By irradiating microwaves when draining the oil by centrifugation, conventional methods The required time, which used to take 20 minutes to 1 hour, was reduced by 20 to 30%. Note that the microwave may be irradiated not only during draining but also during frying as described above.

[Effect of the invention] Thus, according to the present invention, there is a food fryer.

Since it is possible to perform centrifugal separation by irradiating microwaves, the oil content can be more completely separated and removed from fried tofu products, making it possible to cook products with low calories and a light taste that match consumer preferences. Further, the required processing time can be shortened and productivity can be improved, which is beneficial.

[Brief explanation of the drawing]

The drawings show an embodiment of the food fryer of the present invention, in which Fig. 1 is a side view of the overall appearance, Fig. 2 is a longitudinal cross-sectional view of its frying tank, and Fig. 3 is a cross-sectional view of Fig. 2. , FIG. 4 is a piping system diagram. l...Fried oil tank, 1a...Main body, 1b...Opening/closing lid, 8...Motor, 9...Reducer, 18...Center shaft, 22...Basket, 28... Steam heat dissipation pipe, 30...Oil supply/discharge tank, 31a, 31d-Oil supply pipe, 32a, 32d-Valve, 38...Vacuum pump, 41...Intake pipe, 46...Steam generator, 47
...Steam piping, 51...Microwave oscillator, 52...Waveguide. Patent applicant Bocca Corporation Co., Ltd.

Claims (1)

[Claims] A frying tank equipped with an airtight lid that can be opened and closed; a basket for storing food that is rotatably supported within the frying tank by the drive of a motor; A food fryer comprising an oil supply/discharge means for removing edible oil from a frying tank, a vacuum pump for reducing the pressure inside the frying tank, and a microwave oscillator for irradiating microwaves into the frying tank.