JP3204612B2 - Kettle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kettle used for heating food and other contents. In particular, the invention relates to a high-pressure steam pressure cooker that can be used for heating and cooling the contents.

[0002]

2. Description of the Related Art In general, when heating contents such as foods to a high temperature, a gas burner is arranged outside an inner pot to form a heating pot, and the inner pot is heated by the gas burner. Was raising the temperature. However, such a heating method requires a relatively wide gas exhaust port, so that heat is released quickly, so that heat energy loss is relatively large.

[0003] Therefore, pressure cookers that use efficient steam without the need for an exhaust port have been used.

This steam pressure cooker has, for example, as shown in FIG. 9, an inner cooker 20 and an outer cooker 21 disposed outside the inner cooker 20. Steam channel 2 between
2 are formed. A steam channel 2 is provided at the bottom of the outer kettle 21.
A steam inlet 23 and a discharge port 24 communicating with the steam generator 2 are provided, and the inner pot 20 is heated by the steam introduced into the steam flow path 22 from the steam inlet 23 and is discharged from the steam discharge port 24 to the outside. It is configured as follows. Reference numeral 25 in the figure denotes a shielding plate for preventing the heating by steam from acting on a local portion of the inner pot 20, which is welded to the outer surface of the bottom of the inner pot 20.

However, in the pressure cooker having such a configuration, if the pressure of the steam flowing through the steam flow path 22 is to be increased in order to increase the heat transfer coefficient, it is necessary to apply a withstand pressure of a predetermined value or more to the pressure cooker. The thickness of the pressure cooker, especially the inner cooker 2
It is necessary to increase the thickness of 0. When the thickness of the inner pot 20 is increased, the heat transfer efficiency is deteriorated, and there is a drawback that it takes time to heat the contents. In order to cool the contents after heating the contents, for example, cooling water may be passed through the steam passage 22 (in this case, the cooling water outlet is connected to the outer kettle 21).
However, as described above, when the thickness of the inner pot 20 is large, the heat transfer efficiency similarly deteriorates, so that it takes time.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks, and an object of the present invention is to increase the heat transfer efficiency by reducing the thickness of an inner pot compared to the prior art. It is another object of the present invention to provide a pot that can increase the heat transfer coefficient.

[0007] Another object of the present invention is to provide a pot capable of passing not only high-pressure steam but also a coolant such as cooling water and cooling the contents in a short time even in such a case. is there.

Still another object of the present invention is to reduce the heat radiation loss by keeping the outer surface of the kettle warm with a heat insulating material.
Another object of the present invention is to provide a pot that can save heat energy.

[0009]

The kettle of the present invention comprises: an inner kettle;
A medium flow path member welded to the outer surface of the inner pot, and a medium flow path is formed between the inner pot and the medium flow path member. Achieved.

In a preferred embodiment, the cross section of the medium flow path is preferably rectangular or semicircular.

In a preferred embodiment, the medium flow path member is spirally disposed on the outer surface of the bottom of the inner kettle, and a medium is introduced into a radially outer end of the spirally formed medium flow path. Preferably, a port is provided, and a medium outlet is provided at a radially inner end of the medium flow path.

[0012] Further, another kettle of the present invention comprises an inner kettle, an outer kettle provided on the outer surface of the inner kettle with a gap, and a reinforcing member provided between the inner kettle and the outer kettle. And both ends of the reinforcing member are welded to the inner kettle and the outer kettle, respectively, and a medium flow path is formed by the inner kettle, the outer kettle and the reinforcing member, whereby the Objective is achieved.

In a preferred embodiment, the medium is high-pressure steam or cooling water.

In a preferred embodiment, the apparatus preferably further comprises a heat insulating material for covering the outside of the medium flow path member or the reinforcing member.

The operation of the present invention is as follows.

The kettle of the present invention has an inner kettle and a member for a medium flow path welded to the outer surface of the inner kettle, and a medium flow path is provided between the inner kettle and the medium flow path member. With the passage formed, the inner kettle can be heated by a medium such as steam passing through the medium flow path. The medium flow path member serves as a guide for the medium flow path, the cross-sectional area of the medium flow path can be formed relatively small, and the medium flow path member is welded to the outer surface of the inner pot, thereby forming the inner pot. The pressure resistance of the pressure cooker can be increased without increasing the plate thickness.

Further, since the reinforcing member has the same function as the fin, the thermal efficiency is further improved.

In particular, if the medium flow path is formed in a spiral shape, the medium flows smoothly in the medium flow path, so that the flow velocity of the medium can be increased.

Further, by forming the medium flow path into a spiral shape, providing a medium introduction port at a radially outer end thereof, and providing a medium discharge port at a radially inner end thereof, the bottom portion of the inner kettle is usually
The condensed water of the medium such as steam in the medium flow path flows down the medium flow path by its own weight and is discharged to the discharge port because the water is deeper toward the center and located below the outer side in the radial direction.
Further, when a heat insulating material that covers the medium flow path member or the reinforcing member is provided, heat radiation or cooling from the medium flow path can be reduced.

Further, not only a high-pressure medium but also a refrigerant such as cooling water can be passed through the medium flow path. Also in this case, since the thickness of the inner pot can be reduced, the cooling rate can be increased as compared with the conventional case.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a medium, a heat medium such as steam, hot water or oil, or a refrigerant such as water or cold water can be used.

First, a high-pressure steam pressure cooker using high-pressure steam as a medium will be described.

As shown in FIGS. 1 and 2, the high-pressure steam pressure cooker has an inner pot 1 which is open at the top and has a bottom 1a and a side wall 1b, and an outer surface of the bottom 1a of the inner pot 1 with a gap therebetween. It has an outer kettle 2 arranged and a reinforcing member 3 arranged between the inner kettle 1 and the outer kettle 2. The outer kettle 2 and the reinforcing member 3 constitute a member for steam flow as a medium.

The inner pot 1, the outer pot 2, and the reinforcing member 3 are each formed of a metal material such as stainless steel. The reinforcing member 3 is formed in a long strip shape, and the reinforcing member 3
The inner pot 1 is spirally disposed on the outer surface at the bottom. Both ends of the reinforcing member 3 in the width direction are welded to the outer surface of the inner pot 1 and the inner surface of the outer pot 2, respectively, so that the inner pot 1, the outer pot 2, and the reinforcing member 3 have a rectangular cross section. Is formed. Therefore, the steam flow path 5 is formed in a spiral shape.

A closing plate 6 is provided on one end side of the steam flow path 5, that is, radially outside the bottom 1 a of the inner pot 1. The closing plate 6 is welded to the inner pot 1, the outer pot 2, and the reinforcing member 3, and one end of the steam flow path 5 is closed. A steam inlet 8 is provided at one end of the steam channel 5 and is connected to a steam supply pipe (not shown). A steam discharge port 9 is provided at the other end of the steam flow path 5, that is, at the center of the bottom of the inner pot 1, and is connected to a steam discharge pipe (not shown).

A heat insulating material 4 is disposed outside the outer pot 2.
The entire outer pot 2 is covered with a heat insulating material 4. As the heat insulating material 4, a conventionally known material is used. The heat insulating material 4 is held by an exterior plate 7.

As shown in FIG. 3, a steam flow path 5 may be provided on the outer surface of the side wall 1b of the inner kettle 1. In this case, a side outer hook 22 is provided outside the inner pot 1 and a reinforcing member 23 is provided between the inner pot 1 and the side outer hook 22. 23 are welded to the inner kettle 1 and the side outer kettle 22 in the width direction, and the inner kettle 1, the side outer kettle 22 and the reinforcing member 23 form the steam flow path 5 having a rectangular cross section. I have. The reinforcing member 23 is spirally wound around the side wall 1 b so that the steam flow path 5 is twisted around the side wall of the inner pot 1. A steam inlet 28 is provided at one end of the steam flow path 5 located on the upper side, and the steam flow path 5 located on the lower side is provided.
Is provided with a steam discharge port 29 at one end thereof.

The high-pressure steam pressure cooker having the above structure is heated by high-pressure steam in the following manner.

The high-pressure steam introduced from the steam supply pipe through the steam inlets 8 and 28 into the steam flow path 5 spirally flows on the side or bottom surface of the inner pot 1 and then flows out of the steam outlets 9 and 29. It is discharged to a more external discharge pipe. The steam moves on the side surface of the inner pot 1 and the outside of the bottom 1a while being guided by the steam flow path 5, during which the bottom 1a and the side wall 1b of the inner pot 1 are moved.
Heat.

Here, both ends of the reinforcing member 3 are
By being welded to the outer surface and the inner surface of the outer pot 2, respectively, the pressure resistance of the pressure pot can be increased. Steam channel 5
As the high-pressure steam introduced into the inside, for example, 5 kg / c
m ² or more, and may be 7 to 10 kg / cm ² or more.

In the conventional pressure cooker shown in FIG. 7 having an inner diameter of about 1 to 1.5 m, when the steam pressure is set to 5 kg / cm ² , the inner pressure of the inner cooker 20 is increased in order to increase the pressure resistance to a predetermined value or more. Although it was necessary to make the thickness about 8 mm or more, in the pressure cooker of the present invention, the thickness of the inner pot 1 was 2.0 mm at the same steam pressure.
It was found that the distance should be set to about 3.0 mm. When the steam pressure is set to 10 kg / cm ² , the thickness of the inner pot 20 needs to be about 12 to 15 mm in the conventional pressure pot, but in the pressure pot of the present invention, It was found that the thickness of the inner pot 1 should be 3.0 to 4.0 mm under pressure.

FIGS. 4 and 5 show still another embodiment.

In this high-pressure steam pressure cooker, the bottom 1
a semicircular pipe 11 is spirally disposed on the outer surface of the inner pot 1 so that its opening faces the inner pot 1 side, and both ends of the semicircular pipe 11 are welded to the outer face of the bottom 1a of the inner pot 1 to form steam. A channel 5 is formed. The semicircular pipes 11 are arranged densely, that is, in such a manner that the welded portion to the bottom 1a of the adjacent semicircular pipes 11 is in contact. The semicircular tube 11 constitutes a medium flow path member.

Similarly to the high-pressure steam pressure cooker shown in FIGS. 1 to 3, a steam inlet 8 is provided at one end of the spiral steam flow path 5.
And a steam outlet 9 is provided at the other end of the steam flow path 5.

As shown in FIG. 6, a side steam flow path 5 may be formed on the side wall 1b of the inner pot 1 as well. Further, a heat insulating material 4 is provided outside these semicircular tubes 11, and an exterior material 7 covering the heat insulating material 4 is provided.

In these embodiments, the steam flow path 5 can be formed up to the corner between the bottom 1a and the side wall 1b of the inner pot 1, so that the heat transfer area is further increased to increase the heat transfer efficiency. be able to. Further, since the steam flow path 5 can be formed only by welding the semicircular pipe 11 to the outer surface of the inner pot 1, it is relatively easy to produce the pressure pot.

FIGS. 7 and 8 show still another embodiment.

In this embodiment, another second outer kettle 32 is disposed outside the outer kettle 2 provided on the outer surface of the inner kettle 1 via a space 35 for a steam flow path. A steam inlet 38 and a steam outlet 39 are provided at the bottom of the second outer kettle 32 so as to communicate with the inside of the second steam passage 35. In the figure, there are 37 shielding plates.

In the pressure cooker having such a configuration, the second
Steam can be supplied into the steam passage 35 to heat the inner kettle 1 via the inner outer kettle 2 (also referred to as a first outer kettle),
As shown in the above, the inner pot 1 can also be heated by supplying steam into the inner steam flow path 5. Therefore, the inner pot 1 can be efficiently heated. Incidentally, the steam pressure to the first steam flow path 5 is usually better 5 to 10 kg / cm ^2, the vapor pressure of the second steam flow passage 35 is generally that a 2Kg / cm ² or less good.

As shown above, the heat insulating material 4 and the exterior material 7 are also provided outside the second outer hook 32, respectively.

In each of the above embodiments, the case where the contents are heated using the kettle has been described. However, in the present invention, the contents can be cooled using the kettle. In this case, by using water and cold water as the medium and passing these refrigerants through the medium flow path, the heated contents can be easily cooled using the same pot.

Further, in the present invention, the form of the medium flow path can be variously changed. The width of the medium flow path may be reduced so that the entire outer surface of the inner pot is covered with the medium flow path member. Further, a plurality of medium passages may be formed concentrically. In this case, the medium inlet and the outlet are provided in the respective medium channels. Usually, stirring blades are arranged in the inner pot to uniformly stir the contents.

[0043]

According to the present invention, a medium flow path having a relatively small cross-sectional area can be formed outside the inner pot, and the member forming the medium flow path is directly welded to the outer surface of the inner pot. Therefore, the heat transfer (or cooling) efficiency can be increased, and at the same time, the pressure resistance of the kettle can be increased. Therefore, a medium such as high-pressure steam can be passed through the medium flow path without particularly increasing the thickness of the inner pot. Therefore, the thickness of the inner pot can be reduced as compared with the conventional pressure pot, so that the inner pot can be manufactured at low cost and the heat transfer efficiency can be increased.

By forming the medium flow path in a spiral shape,
Since the medium flows without resistance while being guided in the medium flow path, the flow velocity of the medium passing through the inside of the medium flow path increases, and the heat transfer coefficient can be increased to further save energy.
Heat is released (or cooled) when the outer surface of the pot is kept warm with a heat insulating material.
Loss can be reduced and thermal energy can be saved.

Further, according to the present invention, it is possible not only to heat the high pressure steam in the kettle but also to cool it through a refrigerant such as water or cooling water. Can be cooled.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a kettle of the present invention, and FIG.
1A is a plan view thereof, and FIG. 1B is a sectional view thereof.

FIG. 2 is an enlarged sectional view of a corner at the bottom of the shuttle shown in FIG.

FIG. 3 is a view showing another embodiment of the shuttle of the present invention.
FIG. 3A is a plan view thereof, and FIG. 3B is a sectional view thereof.

FIG. 4 is a view showing still another embodiment of the shuttle of the present invention, FIG. 4 (a) is a plan view thereof, and FIG. 4 (b) is a sectional view thereof.

FIG. 5 is an enlarged sectional view of a corner portion at the bottom of the shuttle shown in FIG.

6 is a view showing still another embodiment of the shuttle of the present invention, FIG. 6 (a) is a plan view thereof, and FIG. 6 (b) is a sectional view thereof.

7 is a view showing still another embodiment of the shuttle of the present invention, FIG. 7 (a) is a plan view thereof, and FIG. 7 (b) is a sectional view thereof.

FIG. 8 is an enlarged sectional view of a corner at the bottom of the shuttle shown in FIG. 7;

FIG. 9 is a sectional view of a conventional high-pressure steam pressure cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner pot 2 Outer pot 3 Reinforcement member 4 Heat insulating material 5 Steam flow path 6 Closing plate 7 Outer plate 8, 28 Steam inlet 9, 29 Steam outlet 11 Semicircular pipe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho-62-18020 (JP, U) Japanese Utility Model Showa 50-155386 (JP, U) Japanese Utility Model Utility Model Showa 59-27724 (JP, U) Japanese Utility Model Utility Model 4- 16589 (JP, U) Jikken Sho 12-3746 (JP, Y1) Patent 16940 (JP, C1) (58) Field investigated (Int. Cl. ⁷ , DB name) A47J 27/08 A47J 27/00 101

Claims (5)

(57) [Claims] 1. A medium flow path is formed between an inner pot and a medium flow path member, the medium flow path member being welded to an outer surface of the inner pot. and has a hook, the medium flow path member is formed by a semicircular tube, both of the half circular tube
The side end is welded to the outer surface of the bottom of the inner pot to form the semicircular tube and the inner pot.
And the semicircular tube is spirally disposed on the outer surface of the bottom of the inner kettle.
Wherein the medium flow path is formed in a spiral shape . 2. The shuttle according to claim 1, wherein a cross-sectional shape of the medium flow path is a semicircular shape. 3. A medium introduction port is provided at a radially outer end of the spirally formed medium flow path, and a medium discharge port is provided at a radially inner end of the medium flow path. 1
The described pot. 4. The kettle according to claim 1, wherein the medium is high-pressure steam or cooling water. 5. The pot according to claim 1, further comprising a heat insulating material that covers the outside of the medium flow path member.