JPH1156247A - Stirring and mixing apparatus in ice cream freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce soft ice cream having fine texture and low temperature by placing an intensive stirring part and a scraping and cooling part in the same cylinder. SOLUTION: This stirring and mixing apparatus is composed of an outer cylinder 1 provided with a refrigerant inlet 8 and a refrigerant outlet 9, a cooling cylinder 2 fixed in the outer cylinder 1 and closed at one end with a rear header 4 provided with a raw material supplying port 5 and at the other end with a front header 3 provided with an ice cream dispensing port 7, a cage-type rotary dasher rotatable by a driving shaft 16, and a fixed cylinder shaft 10 having one end fixed to the front header 3 and the other end rotatably supported on a protruded shaft 16A of the driving shaft 16. The outer circumference of the cage-type rotary dasher is provided with a scraper 13 for scraping the inner surface of the cooling cylinder 2 and inside-stirring blades 15 having comb-shape and directed toward the inside of the cage-type rotary dasher. A plurality of stationary blades 11 having comb-shape and engaging with the comb-shaped inside-stirring blades 15 are fixed to the circumference of the fixed cylinder shaft 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ice cream.
The present invention relates to a stirring and mixing device provided in a cooling cylinder of a refrigerator, a sorbet and other confectionery producing devices.

[0002]

2. Description of the Related Art As an ice cream dasher disclosed by the present applicant, Japanese Utility Model Publication No. 57-53177 is known. This is, as shown in FIG. 6, a cylinder-a for circulating the refrigerant liquid in an annular space c partitioned by an inner cylinder b of the cylinder-a, and a rotor d with pins in the inner cylinder b. An agitation cooling area A composed of a basket f with a scraper e surrounding the outside thereof, and a cooling main area B composed of a cylindrical body g.

[0003] With this apparatus, the ice cream raw material is first cooled in the stirring and cooling zone A to form an overrun composition. In the cooling main zone B in the latter half, the friction heat received by the dasher formed by the scraper e, the stirring pin h and the basket f and the heat generated by the stirring are taken away, so that the product is cooled more than before. A temperature lower by 2 ° C. to −3 ° C. is obtained.

However, since the rotor d with pins and the basket f rotate integrally, there is no relative rotation between them. For this reason, the effect of stirring by the stirring pin h attached to the rotor d with pins was insufficient.

Japanese Patent Application Laid-Open No. Hei 7-115910 discloses that
As shown in FIG. 7, a supply port i for a frozen dessert material is provided at one end in the axial direction.
In a frozen confectionery manufacturing apparatus provided with a stirring device m inside a cylindrical cooling cylinder k having a desiccant outlet j at the other end, a scraper slidably in contact with the plurality of stirring members n and the inner peripheral surface of the cylinder. and o are provided in the cooling cylinder k so as to rotate about a central axis p arranged in the center of the cylinder by a driving means as appropriate, and each stirring member n is provided with the central axis p and the cylinder. It is provided so as to rotate between the inner peripheral surface of k.

Since the stirring member n revolves while rotating by the planetary gear drive mechanism, a stirring effect can be obtained. However, gear mechanisms q and r are required for this, and sanitary properties such as mixing of wear powder of the drive gear system are required. There's a problem.

[0007]

In view of the above-mentioned problems of the prior art, (1) when producing ice cream sorbets,
A stable air mixing can be achieved even with a small amount of a stabilizer or the like, and a soft cream can be produced even when the product outlet temperature is lowered. (2) By providing a strong stirring section and a scraping and cooling section in the same cylinder, it is possible to produce frozen desserts with fine texture, low temperature and good shape retention. An object of the present invention is to provide a stirring and mixing device that enables the above points.

[0008]

[Means for Solving the Problems]

(1) An outer cylinder 1 having a refrigerant inlet 8 and a refrigerant outlet 9 and a rear header 4 fixed inside the outer cylinder 1 and having a raw material supply port 5 at one end and an ice cream outlet 7 at the other end. A cooling cylinder 2 sealed with a front header 3 provided with the cooling cylinder 2
And a basket-shaped rotary dasher 6 rotatably provided by a drive shaft 16 and provided at the center of the basket-shaped rotary dasher 6, one end of which is fixed to the front header 3 and the other end thereof. A fixed cylindrical shaft 10 rotatably supported by a protruding shaft 16A provided on the drive shaft 16, and the cage-shaped rotary dasher 6 has a scraper on its outer periphery for scraping the inner surface of the cooling cylinder 2. And a comb-shaped internal stirring blade 15 provided in the basket-shaped rotary dasher 6. The fixed cylindrical shaft 10 intersects with the comb-shaped internal stirring blade 15 on its peripheral surface. It is characterized in that a plurality of comb-like fixed blades 11 to be engaged are fixedly provided. (2) The internal stirring blade 15 is a basket-shaped rotary dasher 6
Can be attached to and detached from the internal agitating blade attachment 14 provided on the outer peripheral surface. (3) The internal stirring blade 15 has two types, a plate-shaped stirring blade 15a and a rod-shaped stirring blade 15b, and can be replaced with the internal stirring blade attachment 14. (4) an outer cylinder 1 having a refrigerant inlet 8 and a refrigerant outlet 9; a rear header 4 fixed inside the outer cylinder 1 and having a raw material supply port 5 at one end and an ice cream outlet 7 at the other end; A cooling cylinder 2 sealed with a front header 3 provided therein, a cage-shaped rotary dasher 6 provided in the cooling cylinder 2 and rotatably provided by a drive shaft 16, and a cage-shaped rotary dasher 6. A fixed cylindrical shaft 10 rotatably supported on a protruding shaft 16A provided on the drive shaft 16 and having one end fixed to the front header 3 and provided at the center;
The dasher 6 has, on its outer periphery, a scraper 13 for scraping the inner surface of the cooling cylinder 2 and an internal stirring blade 15 provided toward the inside of the basket-shaped rotary dasher 6.
Reference numeral 0 denotes a stirring and mixing device having a plurality of fixed comb-shaped fixed blades 11 meshed with the comb-shaped internal stirring blades 15 fixed on its peripheral surface, wherein an ice cream outlet 7 of the fixed cylindrical shaft 10 is provided.
The other half is eccentric with respect to the cage type rotary dasher 6,
Large-diameter eccentric cylindrical portion 1 having no comb-shaped fixed blade 11
0 '.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a stirring and mixing device will be described with reference to FIGS. 1 is a longitudinal sectional view of the stirring and mixing device, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 shows an internal stirring blade.

In FIG. 1, reference numeral 1 denotes an outer cylinder, and 2 denotes a cooling cylinder fixed in the outer cylinder 1. Both ends of the cooling cylinder 2 are sealed by a front header 3 and a rear header 4. The rear header 4 is provided with an ice cream raw material supply port 5. The raw material supplied from the rear header 4 is stirred by a basket-shaped rotary dasher 6 shown below, and the ice cream provided on the front header 3 side.
From the system outlet 7.

The outer cylinder 1 is provided with a refrigerant inlet 8 such as NH ₃ or R22, and a refrigerant outlet 9 on the opposite side. A rotating basket-shaped rotary dasher 6 is provided in the cooling cylinder 2.
However, a fixed cylindrical shaft 10 is provided at the center thereof.

One end of the fixed cylindrical shaft 10 is fixed to the front header 3, and the other end is a protruding shaft 16 provided on the inner end of the drive shaft 16.
A is rotatably fitted to A. A comb-shaped fixed blade 11 is attached to the cylindrical pipe portion 10A of the fixed cylindrical shaft. The fixed blade 11 is made of a flat plate, and has a cylindrical pipe portion 10.
A is equally arranged on the circumference as shown in FIG. 2 when viewed from its end, and is fixed at a fixed angle, for example, a tangential direction.

A scraper attachment 12 is attached to the cage type rotary dasher 6 by welding or the like.
3 is swingably mounted. The scraper 13 is provided for scraping the inner peripheral wall of the cooling cylinder 2. On the outer peripheral portion of the basket-shaped rotary dasher 6, an internal stirring blade mounting device 14 is also attached at regular intervals on the circumference.
A removable comb-shaped internal stirring blade 15 is attached to this, and intersects with the comb-shaped fixed blade 11. As the internal stirring blade 15, two types shown in FIGS. 3A and 3B are selectively used depending on the application. That is, FIG. 3 (a) shows a plate-like internal stirring blade 15a capable of strong stirring, which is suitable for a sorbet or a die ladder. On the other hand, FIG. 3B shows a rod-shaped internal stirring blade 15b of a type capable of soft and uniform stirring, which is suitable for high-fat ice or the like.

The ice crystals scraped off by the scraper 13 are guided to the center by the internal stirring blades 15 and intersect with the comb-shaped fixed blades 11 fixed to the fixed cylindrical shaft 10 and are sheared by this. Under the action, it is strongly stirred and mixed. Further, since the fixed blade 11 fixed to the fixed cylindrical shaft 10 is provided tangentially to the cylindrical pipe portion 10A, the liquid in the central portion is subjected to the outward diffusion action.

FIGS. 4 and 5 show another embodiment of the present invention. This is provided with a large-diameter eccentric cylindrical portion 10 'at the ice cream outlet half of the fixed cylindrical shaft 10;
It is suitable when it is desired to produce an ice cream having a fine texture and being hard and having shape retention. In this case, at the same time, the internal stirring blades 15 on the side of the ice cream outlet 7 are removed, and the raw material is strongly stirred on the half of the raw material supply port 5 side.
In addition, the residence time in this area is increased, and a fine-grained ice cream is first made. Next, in the ice cream outlet side half part, that is, in the part of the large-diameter eccentric cylindrical part 10 'having a slight eccentricity δ (FIG. 5), the residence time is shortened, and the ice cream is rapidly frozen, so that a hard ice cream having good shape retention can be obtained. -Can produce the game.

[0016]

【The invention's effect】

(1) An internal stirring blade that can be attached to and detached from the basket-shaped dasher, and a comb-shaped fixed blade that is mounted on a fixed cylindrical shaft at the center, are arranged so that they rotate relatively while intersecting each other.
The ice cream can be strongly stirred and mixed. (2) Two types of internal stirring blades, a flat plate type and a round bar type, were prepared and made replaceable. And in the case of round bar type,
Since the shearing effect of the mutual blades is weakened, a high-fat ice cream that easily causes churning can be produced. (3) Further, by making the exit side half of the fixed cylindrical shaft a large-diameter eccentric cylindrical portion, it is possible to produce a fine and hard ice cream having good shape retention.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first example of a stirring device of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 shows two examples of the internal stirring blade of FIG.

FIG. 4 is a sectional view of a second example of the stirring device of the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 shows a first example of a known stirring device.

FIG. 7 shows a second example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Cooling cylinder 3 Front header 4 Rear header 5 Raw material supply port (for ice cream) 6 Basket type rotary dasher 7 Ice cream outlet 8 Refrigerant inlet 9 Refrigerant outlet 10 Fixed cylindrical shaft 10 'Large diameter Eccentric cylindrical part 11 Comb-shaped fixed blade 12 Scraper mounting device 13 Scraper 14 Internal stirring blade mounting device 15 Comb-shaped internal stirring blade 15a Plate-type stirring blade 15b Bar-type stirring blade 16 Drive shaft 16A Projection shaft

Claims (4)

[Claims] 1. An outer cylinder (1) having a refrigerant inlet (8) and a refrigerant outlet (9), fixed inside the outer cylinder (1), and having one end connected to a raw material supply port.
A cooling cylinder (2) sealed at the other end with a rear header (4) equipped with (5) and a front header (3) equipped with an ice cream outlet (7); A cage-shaped rotary dasher (6) rotatably provided by a drive shaft (16);
It is provided at the center of the cage type rotary dasher (6), one end is fixed to the front header (3), and the other end is rotatably supported by a protruding shaft (16A) provided on the drive shaft (16). Fixed cylindrical shaft (10)
A scraper (1) for scraping the inner surface of the cooling cylinder (2) is provided on the outer periphery of the basket type rotary dasher (6).
3) and a comb-shaped internal stirring blade (15) provided in the basket-shaped rotary dasher (6), and the fixed cylindrical shaft (10) has the comb-shaped A stirring and mixing device in a frozen dessert manufacturing machine, wherein a plurality of comb-shaped fixed blades (11) intersecting with an internal stirring blade (15) are fixed. 2. An apparatus according to claim 1, wherein the internal stirring blade is detachable from an internal stirring blade mounting member provided on an outer peripheral surface of the basket-shaped rotary dasher. Stirring and mixing equipment. 3. The plate-like stirring blade (15) has an internal stirring blade (15).
3. The stirring and mixing device in a frozen dessert maker according to claim 2, wherein the stirring and mixing device has two types, a) and a rod-shaped stirring blade (15b), and is replaceable with respect to the internal stirring blade attachment (14). 4. An outer cylinder (1) having a refrigerant inlet (8) and a refrigerant outlet (9), fixed inside the outer cylinder (1), and having one end connected to a raw material supply port.
A cooling cylinder (2) sealed with a rear header (4) with (5) and a front header (3) with an ice cream outlet (7) at the other end, and a cooling cylinder (2). A cage-shaped rotary dasher (6) rotatably provided by a drive shaft (16)
And one end fixed to the front header 3 provided at the center of the basket-shaped rotary dasher 6 and the other end rotatable about a protruding shaft 16A provided on the drive shaft 16. Fixed cylindrical shaft supported by
The basket-shaped rotary dasher (6) has a scraper on its outer periphery for scraping the inner surface of the cooling cylinder (2).
(13) and an internal stirring blade (15) provided in the basket-shaped rotary dasher (6), and the fixed cylindrical shaft (10) has a comb-shaped internal stirring blade on its peripheral surface. In a stirring and mixing apparatus in which a plurality of comb-shaped fixed blades (11) intersecting with (15) are fixed, a half of the fixed cylindrical shaft (10) on the ice cream outlet (7) side is formed in a cage shape. A large-diameter eccentric cylindrical portion (10 ') which is eccentric with respect to the rotary dasher (6) and has no comb-shaped fixed blade (11).
A stirring and mixing device in a frozen dessert production machine, characterized in that: