JPS5820620B2 - Continuous flyer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous fryer for vegetables, fruits, rice crackers, etc.

When producing fried products, when raw materials are placed in heated oil, they float to the surface of the oil, causing uneven frying.

Methods such as vigorous stirring or forcibly immersing the raw materials in oil are used.

However, the former method damages the raw material and makes the shape uneven, and the latter method mainly uses a belt conveyor (
For example, in Tokuko Sho 32-5041).

In addition to being complicated in terms of equipment, since the floating raw material is simply held down by a conveyor and transferred while submerged in oil, the raw material itself is essentially stationary in the oil, and the raw material layer is The temperature difference between the top and bottom or the top and bottom surfaces of the raw materials can cause unevenness in the product, and furthermore, the belt conveyor suppresses floating while transferring the product through the oil, so if a mesh belt conveyor is used, the product will not be uniform. It has disadvantages such as the formation of knots.

In view of these circumstances, the inventors of the present invention conducted research into a continuous fryer that can efficiently produce uniform products, and found that if the oil is fried using a screw conveyor while moving the oil, it can be used in conjunction with the appropriate stirring by the screw conveyor. The present invention was completed based on the knowledge that extremely uniform products could be obtained.

Conventionally, it has been known to heat and transfer raw materials floating on the oil surface using a screw conveyor, but the present inventors have discovered for the first time that the raw materials can be transferred in oil.

That is, the present invention has a major feature in that the entire screw conveyor is immersed in oil and a steam separation plate is provided on the top of the screw conveyor, whereby the heated transfer of raw materials in oil by the screw conveyor is possible. Moreover, since the raw materials are transferred while being turned over in the oil while being subjected to a gentle stirring action during heating and transfer, unlike simply heating in oil, the products obtained by the apparatus of the present invention are uniform and have a low yield. This has the effect of increasing the

The present invention will be specifically explained below with reference to the drawings.

FIG. 1 is a schematic longitudinal sectional view showing one embodiment of the present invention.

The heating oil tank 1 has a raw material input port 2 and a raw material discharge port 8, and therein a steam separation plate 4 submerged in oil and a screw conveyor 3 disposed adjacent to the lower side thereof.

The steam separation plate 4 separates and removes water vapor generated from raw materials in oil, and may be of any shape, such as a mesh or perforated plate, as long as it suppresses the floating of raw materials and allows steam to escape. Even if such a steam separation plate is used, the raw material is stirred and reversed by the screw conveyor, so there is no possibility of knots forming.

Further, the screw conveyor 3 may be of a normal shape, or may have a net-like blade portion, as appropriate.

It is important to install the screw conveyor 3 so that it is completely submerged in oil, in other words, below the oil level 5. By doing this, the raw materials are constantly heated in the oil and are heated uniformly without being oxidized by air. You can get a good product.

At the terminal end of the screw conveyor 3, one end of the raw material conveying device 7 is installed close to the raw material transfer device 7 so as to be able to transfer the raw material, and the other end is placed close to the oil level 5'.
It is located at the top and is arranged to face the raw material discharge port 8.

For example, a belt conveyor, a packet conveyor, a screw conveyor, or the like is appropriately used for the raw material conveyance device 7, and the raw material heated and transferred by the screw conveyor 3 is
The raw material is transported to the raw material discharge port 8.

The raw material conveyance device 7 is preferably a net belt conveyor or a packet conveyor having a net-like packet at the bottom, so that the raw material pulled up from the oil is drained of oil while being conveyed to the raw material discharge port 8. It is done.

The heating oil tank is provided with a steam jacket 9 as a heating device, which heats the oil in the oil tank.

As a heating device, it is of course possible to use an open flame using a burner or an electric heating device.

Furthermore, by making the shaft 6 of the screw conveyor 3 hollow to form a steam chamber 11 and introducing heated steam into the steam chamber 11 at the same time as the jacket 9, it is possible not only to efficiently heat the oil in the oil tank from the inside and outside. This has the advantage that the device can be downsized and can be operated with a small amount of oil.

In addition, although Fig. 1 shows a screw conveyor 3 with different diameters at the starting end and the terminal end, the oil temperature decreases due to the raw material at the starting end, that is, near the raw material input port, but the screw conveyor 3 corresponding to this part By making the diameter of the shaft of the conveyor 3 smaller than that of the end portion and increasing the heat transfer area, it is possible to suppress a drop in oil temperature.

Furthermore, the steam separation plate 4 suppresses the floating of the raw material and at the same time separates the steam generated from the raw material.
By doing so, it is possible to not only prevent sedimentation of the slag at the bottom of the oil tank, but also to make the shape of the product uniform.

It is known that when producing fried tofu products, it is possible to operate at a lower oil temperature by using reduced pressure or vacuum, or to prevent oxidation of the oil and raw materials, resulting in better products. It goes without saying that in the present invention, it is also possible to provide sealing valves at the raw material inlet 2 and the raw material outlet 8 to reduce the pressure or create a vacuum inside the apparatus.

Now, to explain frying of sliced potatoes in oil using the apparatus of the present invention, the sliced potatoes introduced from the raw material input port 2 rise to the surface of the oil while rapidly generating steam in the oil, but are gently fried by the 30 revolutions of the screw conveyor. The oil is transported through the oil while being thoroughly agitated.

The raw materials in the oil try to float in the oil tank, but the steam separation plate 4
, and is constantly heated in the oil without floating to the oil surface 5.

Steam generated from the raw material is separated through the holes in the steam separation plate 4, and fine pieces of the raw material also float to the oil surface 5 and are removed.

In the oil tank, the raw material is gently stirred by the rotation of the screw conveyor, so the raw material is heated and transferred in the oil while being rotated appropriately.

In the heating transfer in oil using the known belt conveyor method, the raw material held down by the belt conveyor is transferred as is without being subjected to any action such as reversal, so it is simply heated in the oil. There is a temperature difference between the upper and lower parts of the raw material layer or the upper and lower surfaces of the raw materials, but when the material is transported by the screw conveyor according to the present invention, it is transported in the above-mentioned state, so it is possible to obtain a uniform product by uniform heating. I can do it.

The thus-transferred raw material is pulled up from the oil by the raw material conveying device 7, and is discharged from the raw material outlet 8 while being drained of oil, thereby becoming a potato chip product.

As explained in detail above, the present invention is an automatic fryer for manufacturing fried products by constantly heating raw materials in oil with gentle agitation using a screw conveyor whose entire body is submerged in oil. It has a simple structure compared to other equipment, and can produce uniform products efficiently (because
This is an extremely valuable invention industrially.

3 is a schematic explanatory diagram showing another embodiment of the present invention, and the numbers in the figure are the same as those shown in FIG. 1.

[Brief explanation of drawings]

1 and 3 are schematic longitudinal sectional views of the apparatus of the present invention, and FIG. 2 is a sectional view taken along the line II' in FIG. 1. 1: Heating oil tank, 2: Raw material input port, 3 Niscrew conveyor, 4: Steam separation plate, 5, 5th generation oil level, 6: Screw conveyor shaft, 7: Raw material conveying device, 8: Raw material outlet,
9: Steam jacket (heating device), 10: Steam inlet,
11: Steam chamber, 12: Steam drain outlet.

Claims (1)

[Claims] 1. In a heating oil tank having a raw material input port and a raw material discharge port,
A steam separation plate is provided submerged in oil, a screw conveyor is provided close to the bottom of the steam separation plate, and one end of the raw material conveying device is installed close to the terminal end of the screw conveyor so as to be able to transfer the raw material. The other end of the raw material conveying device is located above the oil level and reaches the raw material discharge port. Continuous flyer arranged to face you. 2. The continuous fryer according to claim 1, wherein the diameter of the starting end of the screw conveyor is smaller than the diameter of the terminal end.