JP2575086Y2 - Food heating cooker - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a food heating cooker for automatically browning hamburger steaks, steaks, roasted tofu and the like mainly produced in food factories.

[0002]

2. Description of the Related Art Generally, hamburgers, steaks and the like used in the food service industry are mass-produced in food factories. In recent years, factory production of roasted tofu has also increased.

[0003] In these products, a rotary drum having projections on the surface is arranged above the conveyor, and the surface is heated to a high temperature by rotating gas by burning gas inside or rotating, and mass production flowing on the conveyor is performed. The surface is browned to make it look like it was made by hand, so that it can come in contact with cooked and prepared food.

[0004]

In the prior art described above, gas combustion requires a large ventilation system for taking in a large amount of air and discharging it together with a large amount of flue gas because a large amount of flue gas is generated. There are restrictions on the installation location.

[0005] Further, the heating efficiency due to the combustion of gas is small, and a large-volume combustion burner is required.

Further, since the combustion exhaust gas is discharged from the bearing direction of the rotary drum, there is a problem that the temperature of the bearing portion increases greatly and the durability of the bearing is short.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a food heating cooker which is small, lightweight, has good heating efficiency, has a long service life, and does not require a combustion exhaust duct. It is intended to do so.

A conveyer for transferring food, a shaft having a low thermal conductivity rotatably supported by a pair of bearings, and a cylindrical rotary drum fixed on the outer side of a concentric circle of the shaft; A plurality of tube heaters made of a metal tube or a non-metal tube of a small diameter are disposed on the outer surface of the rotating drum, and an electromagnetic induction secondary coil is provided at one end of the shaft, and is opposed to the electromagnetic induction secondary coil. Electromagnetic induction 1 in position
A secondary coil is fixedly arranged and an inverter power supply is connected. A high-frequency current is supplied to the electromagnetic induction primary coil, and the tube heater is heated by the eddy current induced in the electromagnetic induction secondary coil.
By rotating the rotating drum so that the outer peripheral speed of the rotating drum matches the speed of the food flowing on the conveyor, the plurality of projected tube heaters can contact the food to heat and brown.

[0009]

According to the above construction, since the tube heater which becomes high temperature is mounted on the outer surface of the rotary drum, it is not necessary to increase the temperature of the rotary drum unnecessarily, and the rotary drum can be reduced in size and weight.

Further, since the shaft is made of a material having a low thermal conductivity, the temperature of the bearing does not rise particularly, and the durability of the bearing is improved.

Further, since no exhaust gas is generated, a large duct is not required, and there is no restriction on the installation place.

Further, since the current to the tube heater can be controlled by the inverter power supply, the temperature control of the rotating drum is easy, and it is easy to cope with a change in the degree of browning or a change in food to be browned. be able to.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes a conveyor for transferring a food 2 to be browned. On the upstream side of the conveyor 1, food manufacturing equipment and food heating equipment (not shown) are provided. Reference numeral 3 denotes a shaft, which is formed in a cylindrical shape from a tough material having a low thermal conductivity and is rotatably supported by a pair of bearings 4 fixed to the outer frame of the conveyor 1 so as to be adjustable in height. Reference numeral 5 denotes a rotating drum which is fixed on the outer side of a circle concentric with the shaft 3, and has a plurality of high-output tube heaters 6 made of a small-diameter metal tube or a non-metal tube protruding from the outer surface thereof. The end 7 of the tube heater 6 is bent inward at the end of the rotary drum 5 and passes through the shaft 3. Reference numeral 8 denotes a disk-shaped electromagnetic induction secondary coil, which is fixed to one end of the shaft 3 on a concentric circle and connected to a terminal 7 of the tube heater 6 by a power supply cable 9. Reference numeral 10 denotes a disc-shaped electromagnetic induction primary coil.
A constant gap is provided at a position facing the electromagnetic induction secondary coil 8 so as to be adjustable in height, and connected to an inverter power supply 11. Reference numeral 12 denotes a cooling fan for cooling self-heating of the electromagnetic induction primary coil 10 and the electromagnetic induction secondary coil 8, and reference numeral 13 denotes a duct for guiding the wind of the cooling fan 12.

The operation of this embodiment having the above configuration will be described.

The inverter power supply 11 is driven and the electromagnetic induction 1
When a high-frequency current is applied to the secondary coil 10 to generate a magnetic field, the magnetic field induces an eddy current in the electromagnetic induction secondary coil 8 facing the electromagnetic induction primary coil 10. The induced current is supplied from the power supply cable 9 to the tube heater 6 disposed on the rotating drum 5 to generate heat. Therefore, since the surface of the tube heater 6 serving as a scorching element is mainly heated, the temperature of the rotary drum 5 does not need to be increased unnecessarily, and the rotary drum 5 can be reduced in size and weight.

Then, an interval between the tube heater 6 and the conveyor 1 is appropriately set according to the food 2 flowing on the conveyor 1,
By controlling the number of rotations of the rotating drum 5 and operating it so that the speed of the conveyor 1 and the outer peripheral speed of the rotating drum 5 are the same, the pipe heater 6 protruding from the surface of the food 2 comes into contact and is browned.

Since the rotating drum 5 heated by the heated tube heater 6 is fixed to the shaft 3 having a small thermal conductivity, heat can be transmitted to the bearing 4 supporting the shaft 3 and the electromagnetic induction secondary coil 8. To reduce the heat radiation from the rotating drum 5 and to reduce the bearing 4 and the electromagnetic induction secondary coil 8
There is no loss of durability.

Although the temperature of the coils 8 and 10 rises due to self-heating, the cooling fan 12
Cooled by the wind.

[0020]

As described above, according to the present invention, a conveyor for transferring food, a shaft having a small thermal conductivity rotatably supported by a pair of bearings, and a cylindrical rotating member fixed to the outside of a concentric circle of the shaft. A plurality of tube heaters made of a small-diameter metal tube or a non-metal tube are disposed on the outer surface of the rotating drum, and an electromagnetic induction secondary coil is provided at one end of the shaft. An electromagnetic induction primary coil is fixedly arranged at a position facing the secondary coil, and an inverter power supply is connected. A high-frequency current flows through the electromagnetic induction primary coil, and a tube is formed by an eddy current induced in the electromagnetic induction secondary coil. Since the heater generates heat, the durability of the components of the power supply unit is improved as compared with the method of supplying power through the contact.

In addition, since the surface of the tube heater serving to give a scorch is mainly heated, there is no need to wastefully raise the temperature of the rotating drum, and the rotating drum can be reduced in size and weight.

Further, since the rotating drum heated by the heated tube heater is fixed to a shaft having a low thermal conductivity, the rotating drum does not transmit heat to bearings supporting the shaft or an electromagnetic induction secondary coil. And the durability of the bearing and the electromagnetic induction secondary coil is not impaired.

Further, since no exhaust gas is generated, a large duct is not required, and there is no restriction on the installation place.

Furthermore, since the current to the tube heater can be controlled by the inverter power supply, it is easy to control the temperature of the rotating drum, and it is possible to easily change the degree of scorching or change the food to be scorched. be able to.

As described above, by rotating the rotating drum so that the outer peripheral speed of the rotating drum matches the speed of the food flowing on the conveyor, the plurality of projected tube heaters come into contact with the food to heat and burn. It is possible to provide a food heating cooker that can be attached and has many advantages.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a food heating cooker according to an embodiment of the present invention.

FIG. 2 is a sectional side view of an essential part of the same.

FIG. 3 is a sectional view of the main part A-A 'in the same manner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor 2 Food 3 Shaft 4 Bearing 5 Rotating drum 6 Tube heater 8 Electromagnetic induction secondary coil 10 Electromagnetic induction primary coil 11 Inverter power supply

Claims (1)

(57) [Scope of request for utility model registration] A shaft (3) having a low thermal conductivity rotatably supported by a pair of bearings (4), and the shaft (3).
And a cylindrical rotary drum (5) fixed on the outer side of a concentric circle of the rotary drum (5). 6), an electromagnetic induction secondary coil (8) is provided at one end of the shaft (3), and the electromagnetic induction primary coil (10) is fixed at a position facing the electromagnetic induction secondary coil (8). A food heating cooker, wherein an inverter power supply (11) is connected to the electromagnetic induction primary coil (10).