JPH06105753A - Steam frier - Google Patents

Abstract

PURPOSE:To shorten the distance of an oil circulation path while the merit of indirect heating system with hot steam is secured and also allow heating the oil even with heat conduction from a heat exchanger to an oil tank. CONSTITUTION:An oil circulation path 4 is furnished in connection with an oil outlet 2 and oil inlet 3 which are formed at an oil tank 1, and on the way of this oil path 4, a filtrating tank 5, oil circulation pump 6, and a heat exchanger 7 using hot steam as a heat source are installed in the sequence as named from the upstream side, wherein the heat exchanger 7 is installed in contact with the external wall surface 1a of the oil tank 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fryer used for producing deep-fried foods such as tempura, and more particularly to a steam fryer whose heat source is steam.

[0002]

2. Description of the Related Art Conventionally, as a steam fryer using steam as a heat source, for example, one shown in FIG. 5 is known. This steam fryer is connected to an oil outlet 101 and an oil inlet 102 formed in an oil tank 100 to form an oil circulation path 103. In the middle of this oil circulation path 103, a filtration tank 104 and an oil circulation pump 105 are provided from the upstream side. The heat exchanger 106 is provided.

The heat exchanger 106 uses heated steam as a heat source, and is placed separately from the oil tank 100.
The steam boiler 1 is installed in the steam passage pipe 107 provided inside the steam boiler 1.
The heating steam from 08 is supplied through the steam supply pipe 109.

Therefore, the oil in the oil tank flows into the oil circulation path from the oil outlet by the operation of the oil circulation pump, and after the frying residue is removed in the filtration tank, it flows into the heat exchanger where the heating steam is generated. It is heated by heat exchange with and is repeatedly returned from the oil inlet into the oil tank. or,
In some heat exchangers that use heated steam as a heat source, as shown in FIG. 6, oil is heated by inserting an oil passage 111 inside a steam passage pipe 110.

As described above, the conventional steam fryer is an indirect heating system using heating steam, in which the oil is circulated and the oil is heated by a heat exchanger using the heating steam as a heat source. Therefore, as compared with the direct flame heating method using gas, the advantages of less deterioration of oil, no uneven heating of oil, easy temperature setting, safety, low running cost, etc. were obtained. .

[0006]

However, in the conventional steam fryer described above, since the heat exchanger is separately placed at a position apart from the oil tank, the oil circulation path around the heat exchanger is separated from the oil tank. The distance becomes longer.

Therefore, it is necessary to circulate the oil at a high speed in view of the heat exchange efficiency, so that the flow rate increases correspondingly, cholesterol is accumulated in the pipe of the oil circulation passage, and the pipe is clogged. There was a problem that it was necessary to increase the total amount. In addition, there is a problem in that the cost of incidental equipment is increased, for example, in order to prevent a decrease in oil temperature during circulation, heat insulation work is required for the oil circulation path piping. Further, in the case where the oil passage pipe 111 is inserted into the inside of the steam passage pipe 110, a single pipe is formed for the steam, and this steam passage is supplied during the supply of high pressure steam (Max 20 kg / cm ² ). There was a problem that it was very dangerous when the pipe had a hole.

The present invention has been made by paying attention to the above-mentioned problems. The distance of the oil circulation path can be shortened while the indirect heating method using heating steam is adopted, and the heat exchanger to the oil tank can be shortened. An object of the present invention is to provide a steam fryer capable of heating oil by heat transfer and safely treating it even if a hole is formed in the steam passage pipe.

[0009]

In order to solve the above-mentioned problems, in the steam fryer according to claim 1 of the present invention,
As shown in the structural explanatory view of FIG. 1, an oil circulation path 4 is provided so as to be connected to an oil outlet 2 and an oil inlet 3 formed in an oil tank 1. In the middle of the oil circulation path 4, a filtration tank from the upstream side is provided. 5, an oil circulation pump 6, and a heat exchanger 7 using heating steam as a heat source are provided, and the heat exchanger 7 is attached in contact with the outer wall surface 1a of the oil tank 1. In addition, 8 is a steam boiler, and heating steam is supplied from this steam boiler 8 to the heat exchanger 7.

Further, in the steam fryer according to claim 2 of the present invention, as shown in FIG. 3, the steam exchanger pipe 70b is inserted inside the outer cylinder 70a in which the heat exchanger 7 forms the oil passage 71. It is formed in a heavy pipe structure.

[0011]

In the steam fryer of the present invention, the oil in the oil tank 1 flows into the oil circulation path 4 from the oil outlet 2 by the operation of the oil circulation pump 6, and after the frying residue is removed in the filtration tank 5, the heat is removed. It flows into the exchanger 7, where it is heated by heat exchange with the heating steam, and is returned from the oil inlet 3 back into the oil tank 1 to repeat the circulation. Therefore, the advantages of the indirect heating method using heated steam can be obtained as in the conventional case.

Further, since the heat exchanger 7 is attached in contact with the outer wall surface 1a of the oil tank 1, the heat exchanger 7 is moved from the oil tank 1 to the heat exchanger 7.
It is possible to shorten the distance of the oil circulation path 4 that goes around. Therefore, since it is not necessary to circulate the oil at a high speed, the flow rate is not reduced, the inside of the pipe of the oil circulation path 4 is not clogged with cholesterol, and the total amount of oil can be reduced. In addition, heat insulation work for preventing a decrease in oil temperature during circulation is unnecessary, and the cost of incidental equipment can be reduced.

Further, since the heat exchanger 7 is attached in contact with the outer wall surface 1a of the oil tank 1, the heat exchanger 7 is removed from the oil tank 1
The oil can be heated by heat transfer to the oil, and the heat retention of the oil in the oil tank 1 can be improved.

Further, since the steam passage pipe 70b is inserted into the outer cylinder 70a and has a double structure with respect to the steam passage, even if a hole is formed in the steam passage pipe 70b, the steam will not flow outside. It can be processed safely without squirting.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 2 is a side view showing the steam fryer of the embodiment, and 10 in the figure is an oil tank.

The oil tank 10 serves as a pan containing oil, and a net conveyor 11 for feeding products is stretched inside the pan.

An oil circulation path 40 is connected to the oil tank 10. The oil circulation path 40 is connected to the oil outlet 20 formed at the bottom of the oil tank 10 and the oil inlet 30 formed at the top of the oil tank 10. In the middle of the oil circulation path 40, the filtration tank 50 and the oil circulation pump 6 are arranged from the upstream side.
0, a heat exchanger 70 using heated steam as a heat source is provided.

Next, the structure of the heat exchanger 70 will be described with reference to FIG. The heat exchanger 70 has a double pipe structure including an outer cylinder 70a and a steam passage pipe 70b. Outer cylinder 70a
Has an oil passage 71 inside, and partition plates 74, 74 are provided so that the oil passage 71 meanders from the inflow port 72 toward the outflow port 73. Also, this outer cylinder 70a
One end is opened as an assembling port 75, and the assembling port 75 is provided with a detachable lid body 76 by flange joining.

The steam passage pipe 70b is supplied with heating steam from the steam boiler 80 through the steam supply pipe 81, and is bent so as to meander from the steam inlet 77 toward the drain outlet 78. One end side is fixed to the lid body 76. Therefore, the heat exchanger 70 can be easily assembled simply by inserting the steam passage pipe 70b into the oil passage 71 of the outer cylinder 70a from the assembly port 75 of the outer cylinder 70a and flange-joining the lid body 76. Further, disassembly for maintenance such as internal cleaning can be easily performed.

A mixing plate 79, which also serves as a support member for the steam passage pipe 70b, is attached to the steam passage pipe 70b. The mixing plate 79 causes the oil passing through the oil passage 71 to meander to make the heat exchange uniform.

Further, the heat exchanger 70 has a structure as shown in FIG.
(A sectional view taken along the line AA), the oil tank 10 is attached in contact with the outer wall surface thereof. In this case, the outer cylinder 70a of the heat exchanger 70 has the side walls 12, 12 and the bottom wall 13 of the oil tank 10.
It is attached so that it directly contacts the outer surface of the and covers the entire surface. The outside of the heat exchanger 70 is covered with a heat insulating material 90.

Next, the operation of the embodiment will be described. In the steam fryer of the present embodiment, the oil in the oil tank 10 is supplied from the oil outlet 20 to the oil circulation path 4 by the operation of the oil circulation pump 60.
0, and after the frying residue has been removed by the filtration tank 50, it then flows into the heat exchanger 70, where it is heated by heat exchange with heating steam, and returns from the oil inlet 30 to the oil tank 10 again. I will repeat. Therefore, the advantage of the indirect heating method by heating steam, that is, less oil deterioration, no heating unevenness of oil, easy temperature setting, safe, low running cost compared to the direct fire heating method by gas , Etc. can be obtained.

Further, since the heat exchanger 70 is attached in contact with the outer wall surface of the oil tank 10, the distance of the oil circulation passage 40 can be shortened. Therefore, since it is not necessary to circulate the oil at a high speed, the flow rate does not decrease, the inside of the oil circulation passage 40 is not clogged with cholesterol, and the total amount of oil can be reduced. In addition, heat insulation work for preventing a decrease in oil temperature during circulation is unnecessary, and the cost of incidental equipment can be reduced.

Further, since the heat exchanger 70 is attached in contact with the outer wall surface of the oil tank 10, the heat can be transferred from the heat exchanger 70 to the oil tank 10 to heat the oil.
The heat retention of the oil in the oil tank 10 can be improved.

Further, since the steam passage pipe 70b is inside the outer cylinder 70a and has a double pipe structure, even if a hole is formed in the steam passage pipe 70b, the spouted steam stays in the outer cylinder. Since it does not gush out to the outside, it can be handled safely.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration is not limited to this embodiment.

[0027]

As described above, in the steam fryer according to claim 1 of the present invention, since the oil is heated by the heat exchanger using the heating steam as the heat source, the advantage of the indirect heating system by the heating steam is obtained. Obtainable. Further, since the heat exchanger is attached in contact with the outer wall surface of the oil tank, the distance of the oil circulation path can be shortened, and the oil can be heated by heat transfer from the heat exchanger to the oil tank.

In the steam fryer according to claim 2 of the present invention, since the steam passage pipe has a double-pipe structure, even if the steam passage pipe has a hole and high-pressure steam is jetted out, it does not come out. The effect of being safe is obtained.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a steam fryer of the present invention.

FIG. 2 is a side view showing the steam fryer of the embodiment.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an exploded perspective view of a heat exchanger provided in the steam fryer of the embodiment.

FIG. 5 is a structural explanatory view showing a conventional steam fryer.

FIG. 6 is a sectional view showing a conventional heat exchanger.

[Explanation of symbols]

 1 oil tank 1a outer wall surface 2 oil outlet 3 oil inlet 4 oil circulation path 5 filtration tank 6 oil circulation pump 7 heat exchanger 8 steam boiler 70a outer cylinder 70b steam passage pipe 71 oil passage

Claims (2)

[Claims] 1. An oil outlet formed in an oil tank and an oil circulation path connected to the oil inlet are provided, and a filtration tank, an oil circulation pump, and heating steam are used as heat sources from the upstream side in the middle of this oil circulation path. A steam fryer, wherein a heat exchanger is provided, and the heat exchanger is attached in contact with an outer wall surface of the oil tank. 2. The steam fryer according to claim 1, wherein the heat exchanger is formed in a double structure by inserting a steam passage pipe inside an outer cylinder forming an oil passage. Flyer.