JPS5949006B2 - Deep frying equipment with built-in heat exchanger - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a frying device with a built-in heat exchanger, and in particular, a heat exchanger is installed in the oil of a frying pan through which an endless conveyor passes, making it possible to adjust the temperature distribution in the direction of passage. By heating the oil through the heat exchange, the food debris that settles to the bottom of the frying pan is prevented from being carbonized, and there is no need to circulate the oil outside the frying pan.

Conventional oil frying devices of this kind include direct-fire type and external heating type, depending on the means for heating the oil.

The direct heating type heats the oil by injecting a flame with a burner or the like onto the underside of the bottom of the frying pan, while the external heating type heats the oil inside the frying pan by drawing it out via a pipeline. The format is to return it to the frying pan.

In the direct-fire type heating means, since the flame is injected onto the bottom of the frying pan, the bottom of the frying pan becomes overheated.

When pieces of food to be fried, such as instant noodles, sink to the bottom, they are carbonized by the heat, float to the surface due to oil convection and other causes, and adhere to the food being fried, reducing the commercial value of the food. It may reduce the

In addition, overheating the bottom of the frying pan may accelerate its deterioration due to oxidation, and since the flame is only sprayed in a certain area, it becomes difficult to adjust the oil temperature distribution inside the frying pan. However, since the oil and flame are close to each other through the bottom of the frying pan, there is also the problem of lack of safety in terms of fire prevention.

In addition, in the external heating type heating means, oil is guided through a pipeline to an external heating device and returned to the frying pan after being heated, so a pump and a drive source for the pump are required for the circulation. Become.

In this type, the oil is sheared while passing through the pump, and cavitation occurs in the oil due to the suction of the pump, resulting in accelerated deterioration of the oil.

Therefore, the present invention provides a frying device that solves the problems of the above-mentioned direct-fire type and external heating type frying devices, and its purpose is to prevent food debris that has settled to the bottom from being carbonized. The purpose is to prevent deterioration of the bottom of the frying pan, and the purpose is to make it possible to adjust the oil temperature distribution, and to improve safety by separating the oil and the heat source. In particular, the object is to provide a frying device that does not lead oil out of the frying pan.

That is, this invention is an apparatus for passing an endless conveyor 3 through oil 2 in a frying pan 1 and frying food 4 while being transferred by the conveyor 3. To provide a frying device with a built-in heat exchanger, which is installed so that the temperature distribution in the same direction can be adjusted in the moving direction of the oil 2, and heats the oil 2 by these heat exchangers 5.

Next, the present invention will be explained according to illustrated embodiments.

First, to explain the configuration, 1 is a frying pan, and entrance 1
The bottom 7a of the section a and the bottom 7b of the outlet 1b are inclined, and the bottom 7C of the central section is deep and horizontal.

This frying pan 1 is filled with edible oil 2, and an endless conveyor 3 is installed so as to pass through the oil 2 between an inlet 1a and an outlet 1b.

The endless conveyor 3 has endless chains 8 on both sides in the width direction, and a frame 9 shown in FIG. 3 is stretched between both chains 8 like a slat conveyor. The containers 10 are fixed in a row in the width direction.

In this way, the conveyor 3 has the same number of containers 10 as the containers 10 in the frame 9 in an endless row.

The container 10 has a large number of small holes 10a at least at the bottom, so that the internal food 4 such as instant noodles can be immersed in the oil 2.

The endless conveyor 3 is configured so that the chino 8 is guided by a guide (not shown), and therefore follows a path that is approximately parallel to the bottoms 7a, 7C, and 7b of the frying pan 1 as shown in FIG. ing.

Reference numeral 11 denotes a machine frame of the conveyor 3, in which a receiving section 12 for receiving the food 4 in the container 10 of the conveyor 3 is formed outside the entrance 1a, and a discharge section for discharging the food 4 from the container 10 outside the exit 1b. 13 is formed.

The rotating shaft and guide of the endless conveyor 3 are supported by the machine frame 11, and as the machine frame 11 rises, the endless conveyor 3 also rises together.

Reference numeral 14 denotes a holding conveyor, which moves at the same speed as the endless conveyor 3 and forms a lid that covers the top surface of the container 10 in the oil 2.

This holding conveyor 14 also has endless chains 15 at both ends in the width direction, and a plate body 16 is stretched between both chains 15 like a slat conveyor, and this plate body 16 forms the lid.

Therefore, it is also preferable to drill a large number of small holes in the plate 16.

This presser conveyor 14 also has a guide (not shown).
Moreover, like the endless conveyor 3, it is supported by the machine frame 11, and as the machine frame 11 rises, the presser conveyor 14 also rises.

6 is a lifting machine, which is a screw shirt that is erected) 6
a, a gear box 6b containing a gear that meshes with the gear box 6b, and a rotating shaft 6C that rotates the gear.The gear box 6b is fixed to the machine frame 11, and the machine frame 11 is rotated by the rotation of the rotating shaft 6C. It is configured to go up and down.

Reference numeral 17 denotes a motor that rotates the rotation shaft 6C, and this is installed on a lid 18 installed on the machine frame 11.

Also, on the lid 18, there is an endless conveyor 3 and a presser conveyor 14.
A motor 19 is also installed to drive the.

Between the outward path 3a and the return path 3b of the endless conveyor 3, oil 2
A heat exchanger 5 is installed inside.

Here, four heat exchangers 5 are provided between the inlet 1a and the outlet 1b, and are attached to the guide of the endless conveyor 3, so that they can be moved up and down together with the endless conveyor 3.

The number of heat exchangers 5 can be increased or decreased as appropriate.

The heat exchanger 5, as shown in particular in FIGS. 2 and 3,
It consists of a plate 5a, a pipe 5b, and a rod (not shown) connecting each plate 5a, and the entire plate 5a is installed to be inclined so that the upper end of the plate 5a faces the inlet 1a side.

The tubes 5b of each plate 5a may be connected between the tubes 5b of adjacent plates 5a, or the tubes 5b of each plate 5a may be connected in parallel to a base tube (not shown).

Heat is exchanged with the oil 2 by passing hot steam through each tube 5b.

FIG. 4 shows the relationship between the boiler 20 and each heat exchanger 5.

That is, branch pipes 23 equipped with regulating valves 22 are connected to a main pipe 21 connected to a boiler 20, and each branch pipe 23 is connected to a heat exchanger 5.

The branch pipe 23 is connected to the base pipe of the heat exchanger 5, and the pipes 5b of each plate 5a are connected in parallel or in series to the base pipe.

Each heat exchanger 5 is provided with a drain pipe 24,
This is connected to a drain pipe or return pipe which returns the water to the boiler 20.

When hot steam is used in other processing steps for the food product 4, the boiler 20 can also be used as a hot steam generation source for that step.

Next, the action will be explained.

The endless conveyor 3 moves to the right in FIG. 1 with the outward path 3a facing upward.

Then, the food 4 is supplied to the container 10 in the receiving section 12, and the food 4 is directly introduced into the frying pan 1 from the inlet 1a.

The food 4 is fried while passing through the oil 2 in the frying pan 2, reaches the discharge part 13 from the outlet 1b, and when the endless conveyor 30 is reversed, the fried food 4 is discharged from the container 10 and supplied to the next process.

While passing through the oil 2, the upper surface of the container 10 is covered by the plate 16 of the holding conveyor 14, so that the food 4 is prevented from floating up and leaving the container 10.

The plate 16 is moved in synchronization with the container 10.

The oil 2 is heat exchanged and heated by the heat exchanger 5.

That is, the hot steam generated by the boiler 20 flows into the main pipe 21. The oil 2 is introduced into the heat exchanger 5 via the branch pipe 23, and as it passes through the pipe 5b, heat is exchanged and the oil 2 is heated.

The plate 5a is slanted so that its upper part faces toward the entrance 1a of the frying pan 1, and as shown in FIG. Since the conveyor 3, particularly its container 10, causes the oil 2 to flow in the directions of arrows A and B, the heat exchange on the surface of the tube 5b is effectively achieved.

Further, in the oil 2, a turbulent flow is generated around the container 10 due to moisture evaporated from the food 4 during frying, and this turbulence causes another flow in the oil 2 around the pipe 5b, which lowers the heat exchange rate. raise it further.

Particularly in the case of this embodiment, since the heat exchanger 5 is disposed directly below the outgoing path 3a used for deep-frying, the heat source is preferably placed at an optimal position.

Then, when the fragments of the food 4 fall from the container 10 on the outward path 3a, the fragments fall between the plates 5a and sink to the upper surface of the bottom 7C of the frying pan 1.

However, in this embodiment, the heat exchanger 5 as a heat source
Since it is located above the bottom 7C, there is no possibility that the settled debris will be carbonized.

In addition, depending on the type of food 4 and other conditions, frying pan 1
When adjusting the temperature distribution of the oil 2, the adjustment valves 22 of the branch pipes 23 connected to each heat exchanger 5 may be opened and closed.

When adjusting the oil temperature of the frying pan 1 as a whole, it is sufficient to open and close all of the adjustment valves 22, or each adjustment valve 22 can be adjusted individually to adjust the oil temperature in the part near the inlet 1a of the frying pan 1, in the central part,
It is also possible to adjust the temperature distribution of each portion near the outlet 1b.

Furthermore, when cleaning the inside of the frying pan 1, the motor 17
The lifting machine 6 is operated by rotating the .

That is, due to the rotation of the rotating shaft 6C, the gear box 6b
When the gear inside is rotated, the gear box 6b rises along the screw shaft 6a and pulls up the machine frame 11.

Along with this, the lid 18 supported by the machine frame 11, the endless conveyor 3, the presser conveyor 14, and the heat exchanger 5 supported by the guide of the endless conveyor 3 rise together, so that the upper surface of the frying pan 1 It will be opened and only oil 2 will remain inside.

Therefore, it is possible to easily replace the oil 2 and clean the debris of the food 4 that has settled on the upper surface of the bottom portion 7C.

When the heat exchanger 5 is raised, it is preferable that the main pipe 21 or branch pipe 23 between the heat exchanger 5 and the boiler 20 can be removed from the middle using a joint.

When the cleaning is finished, the motor 17 is rotated in the opposite direction to lower the machine frame 11 to its original position.

Then, the frying pan 1 may be refilled with oil before and after, and the heat exchanger 5 and the boiler 20 may be connected.

- The loaded oil 2 will remain in the frying pan 1 until it is drained.
It will not be leaked outside.

As is clear from the above, according to the present invention, a plurality of heat exchangers are installed in the oil as a heat source for the oil used in the frying device, and the heat exchangers are arranged so that the temperature distribution in the same direction as the conveyor is moved. Since the adjustable setting does not require heating the bottom of the frying pan, the bottom will not deteriorate and food particles that have settled to the bottom will not be carbonized.

Therefore, carbonized fragments do not adhere to the food and reduce the commercial value of the food.

Also, since oil is not circulated outside the frying pan,
Since a pump for circulation and a motor as its driving source are not used, and therefore, there is no oil shearing or cavitation caused by the pump, no oil deterioration occurs.

Furthermore, since the oil temperature distribution within the frying pan can be adjusted by using a plurality of heat exchangers, it is possible to perform deep-frying treatment suitable for the type and properties of the food.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the invention, and FIG. 2 is an explanatory diagram showing an embodiment of the present invention.
FIG. 3 is a front view showing a part of the heat exchanger, FIG. 3 is a sectional view showing the relationship between the endless conveyor and the heat exchanger, and FIG. 4 is a circuit diagram between the heat exchanger and the boiler. In the figure, 1 is a frying pan, 2 is oil, 3 is an endless conveyor,
3a is the outward route, 3b is the return route, 4 is the food, 5 is the heat exchanger, 5a is the plate, 5b is the pipe, 6 is the lifting machine, 7a
, 7b, 7C are the bottom of the frying pan, 8 is a chino, 9 is a frame, 10 is a container, 11 is a machine frame, 14 is a presser conveyor, 15
16 is a board, and 20 is a boiler.

Claims (1)

[Claims] 1. In an apparatus for passing an endless conveyor through oil in a frying pan and frying food while being transferred by the conveyor, a plurality of heat exchangers are installed in the oil in the same direction as the endless conveyor. A frying device with a built-in heat exchanger, characterized in that the oil is heated by the heat exchanger installed so that the temperature distribution of the oil can be adjusted. 2. A heat exchanger is installed between the upper part of the outbound conveyor and the lower part of the return route, and the heat exchanger has a tube through which the vapor of the heating medium passes and a plate that supports the tube, 2. A frying device incorporating a heat exchanger according to claim 1, wherein the plate is inclined so that its upper end faces toward the inlet of the frying pan.