JP2543054Y2 - Stirrer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to, for example, a stirrer suitably used for producing bean jam.

(Prior Art) Bean paste such as strained bean paste, white bean paste and yellowish bean paste is produced by adding sugar and water to raw bean paste produced by boiling beans and stirring the mixture while heating. As a stirrer used in the production of bean jam, for example, there is a steam heating type stirrer. As shown in FIG. 8, the stirring device surrounds a pot-shaped container 61 for accommodating the raw material 10 to be stirred and a bottom portion of the container 61 at an appropriate interval, and a jacket through which steam flows. 62. Raw material 10 heated in container 61
While being in contact with the inner surface of the bottom of the container 61, is stirred by the stirring blade 63 moving around in the container 61. The stirring blade 63
Are radially attached to the lower end of a rotating shaft 64 disposed at the axis of the container.

(Problem to be Solved by the Invention) Since such a conventional stirring device is configured such that the entire bottom of the container 61 is directly heated by steam, the raw material 10 in the container 61 is It is heated from the part in contact with the inner surface. For this reason, when an appropriate time has elapsed after the start of heating, the raw material in contact with the bottom is heated,
The raw material begins to boil. In such a state, a foam layer is formed between the raw material 10 and the inner surface of the bottom of the container 61, and the raw material 10 floats in the container 61. as a result,
There is a possibility that the raw material 10 starts to move around in the container 61 together with the stirring blade 63. The phenomenon that the raw material 10 moves around with the stirring blade 63 is called co-rotation, and when such a phenomenon occurs,
The raw material 10 itself is not stirred and mixed.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a stirring device in which a raw material in a container is reliably heated and stirred without moving around with a stirring blade.

(Means for Solving the Problems) The stirring device of the present invention comprises a container having an outer peripheral portion on the bottom surface higher than the central portion, a viscous fluid, and a raw material contained in the container, In order to stir the raw material in the container, a rotating blade that rotates inside the container, and a heating unit that heats the bottom of the container from outside are provided, and the outer peripheral portion of the bottom of the container is provided at least at one stage during the stirring process. The region not heated by the heating means is partially formed, thereby achieving the above object.

(Operation) A raw material, which is a viscous fluid to be agitated by the present invention, for example, bean jam is stored in the bottom of a container, and the bottom of the container is heated by heating means. For this reason, generally, the bean paste is heated from the part in contact with the bottom inner surface of the container, and when it boils, a layer of foam is formed between the bean paste and the bottom inner surface of the container. As a result, the sticky paste composed of the viscous fluid becomes a lump in the container and floats up, and moves around the inside of the container together with the stirring blade. In this state, the bean jam is not stirred, and the stirring efficiency is reduced.

However, in the present invention, a region that is not heated by the heating means at least at one time during the stirring process is partially formed on the outer peripheral portion of the bottom of the container. In addition, the outer peripheral portion of the bottom, that is, the non-heated region is higher than the central portion. Therefore, the temperature in the non-heated area is low and there is almost no bubbles.

For this reason, the bean that has been moved to the non-heated area by the stirring blade is in close contact with the bottom surface of the container, and is resistant to the stirring blade moving around. As a result, since the bean jam, that is, the entire raw material does not rotate together with the stirring blade in the container, the stirring efficiency of the raw material can be improved.

(Examples) Hereinafter, the present invention will be described with reference to examples.

The stirring device of the present invention is used, for example, for producing bean jam, white bean jam, yellowish bean jam and the like. As shown in FIG. 1, the stirring device includes a container 20 for accommodating a raw material 10 obtained by adding sugar and water to raw bean jam, for example. The container 20 is a so-called pressure cooker, and has a pot-shaped container body 21 and a lid 22 that is hermetically engaged with the container body 21. The bottom of the container body 21 has a substantially semi-circular cross section.

A stirring blade 30 is provided in the bottom of the container body 21. The stirring blade 30 radially extends outward from a lower end of a rotating shaft 31 vertically disposed at an axial center position of the container main body 21, and a lower end edge thereof is in contact with a bottom inner surface of the container body 21. ing. The upper end of the rotating shaft 31 is connected to a driving mechanism 32 attached to the upper surface of the lid 22, and the stirring mechanism 30 is moved around the container body 21 by the driving mechanism.

Heating means 40 is attached to the outer periphery of the bottom of the container body 21 in which the stirring blade 30 is disposed. The heating means 40
A jacket 41 that covers the bottom is provided at an appropriate distance from the outer surface of the bottom of the container body 21, and steam flows through the jacket 41. As shown in FIG. 2, the jacket 41 is in a state where the stirring blade 30 does not cover substantially one third of the bottom surface of the container body 21 around which the stirring blade 30 moves. Therefore, the area of the bottom of the container body 21 that is not covered with the jacket 41 is not directly heated from the outside by the steam. The region from the bottom of the container body 21 that is not directly heated by steam is appropriately set so as not to hinder the heating of the raw material 10 that moves around the container body 21.

In the stirring device of the present invention having such a configuration, for example, bean paste is manufactured as follows.

The raw material 10 in which sugar water is added to the raw bean paste is put into the container main body 21, and the lid 21 is engaged with the container main body 21 in a sealed state. In such a state, the stirring blade 30 is circulated along the bottom of the container body 21. At the same time, the steam is allowed to flow through the jacket 41. Due to the steam flowing into the jacket 41, the area covered by the jacket 41 is directly heated by the steam at the bottom of the container body 21.
Areas not covered at 41 are not directly heated by steam. The temperature of the bottom portion not covered by the jacket 41 is sufficiently lower than the temperature of the region covered by the jacket 41 and directly heated by steam.

In this state, when the raw material 10 in the container main body 21 is heated while being stirred, the raw material 10 boils in a region directly heated by steam at the bottom of the container main body 21, and bubbles are generated between the bottom surface and the raw material 10. Layer is formed. However, raw materials in such a state
The stirring blade 30 is moved around by the stirring blade 30 to a region that is not directly heated by steam, and the temperature is reduced in this region. As a result, the raw material 10 in the container body 21 adheres to the bottom surface in this low-temperature region, and when rotating around the stirring blade 30, co-rotation with the stirring blade 30 is prevented. Therefore, the raw material 10 in the container body 21 is
Stirring and mixing are ensured by 30.

At this time, since the low-temperature area at the bottom of the container body 21 is formed in a part of the orbital movement area of the stirring blade 30, the raw material 10 orbited by the stirring blade 30 is once cooled to a low temperature after heating. This cycle is repeated, and the stirring effect of the raw materials is excellent. In addition, raw materials 10
And the raw material 10 in contact with the heating region are effectively mixed, so that there is also an advantage that the raw material 10 in the container body 21 is uniformly heated. The stirring effect in the low-temperature region increases as the low-temperature region is located closer to the outer periphery of the bottom of the container body 21 and the area thereof is larger.

In the above embodiment, the jacket in the heating means 30 is used.
Although a low-temperature region is formed in the bottom of the container body 21 so as not to cover a part of the bottom of the container with the 31, the invention is not limited to this. For example, as shown in FIG. 3 and FIG. May be partially partitioned by a partition plate 42 so that steam does not flow through that portion. In the embodiment shown in FIGS. 3 and 4, the region through which steam does not flow is provided in a part of the outer peripheral portion of the jacket 41 in the circumferential direction, and this region is filled with a heat insulating material 43. ing. Even with such a configuration, a low-temperature region is formed in a part of the orbital movement region of the stirring blade 30 at the bottom of the container body 21, so that the raw material 10 in the container body 21 is reliably stirred.

As shown in FIG. 5, the stirring blade 30 supports the stirring blade 30 with a support shaft 33 that is eccentric with respect to the axis of the container body 21, and moves the support shaft 33 around the axis of the container body 21. Thus, a structure in which the stirring blade 30 revolves may be used.

Also, as shown in FIG. 6 and FIG.
A part of 50 is kept partitioned by one partition plate 52, and steam is first flowed into both spaces 53 and 54, and the raw material 10 in the container body 21 is stirred by the stirring blade 30. While heating. Then, after that, the raw material 10 is
When it starts to rotate together with it, the steam in one space 53 is removed, cooling water is injected into the space 53, and the container body
A part of 21 may be cooled by cooling water in the space 53.

The heating means 40 may be a means other than steam, such as a burner.

(Effects of the Invention) The above-described stirring device of the present invention employs a configuration in which heating is performed directly except for a part of the outer peripheral portion at the bottom of the container accommodating the material to be agitated, so that the heating efficiency for the material in the container can be increased. There are advantages.

In addition, the stirring device of the present invention has a structure in which a region not heated by the heating means is partially formed on the outer peripheral portion of the bottom of the container which is higher than the central portion at least at one time during the stirring process. The raw material that has been moved to the non-heating area by the blade is in close contact with the bottom surface of the container, and has resistance to the stirring blade that moves around. As a result, since the whole raw material does not rotate together with the stirring blade in the container, there is an advantage that the stirring efficiency of the raw material can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view showing an example of the stirring device of the present invention, FIG. 2 is a plan view of the container body and the jacket, FIG. 3 is a vertical side view showing another example of the stirring device of the present invention, FIG. FIG. 4 is a plan view of the container body and the jacket, FIG. 5 is a longitudinal sectional side view showing still another example of the stirring device of the present invention, and FIG. 6 is a container 20 showing still another example of the stirring device of the present invention. , FIG. 7 is a longitudinal sectional view thereof, and FIG. 8 is a longitudinal sectional side view of a conventional stirring device. 10 ... raw material, 20 ... container, 21 ... container body, 30 ... stirring blade, 40
... heating means, 41, 51 ... jacket.

Claims (1)

(57) [Scope of request for utility model registration] 1. A container having an outer peripheral portion at a bottom surface higher than a central portion, a viscous fluid, a raw material contained in the container, and a container for stirring the raw material in the container. And a heating means for heating the bottom of the container from the outside.A region not heated by the heating means at least at one time during the stirring process is partially formed on an outer peripheral portion of the bottom of the container. A stirring device formed in the.