JPH0730982B2 - Ice making equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ice making device for producing slurry-like ice which is mainly used as a cold heat source of an air conditioner.

(Prior Art) Conventionally, this type of ice making device is described in, for example, Japanese Patent Publication No. 44-29026, and as shown in FIG. 6, an ice making device is provided inside an outer tube (OT) through which a refrigerant flows. The inner tube (IT) through which the working solution flows is arranged, and the rotating body (D) having a plurality of blades (B) constantly in contact with the inner surface of the inner tube (IT) is rotatably supported. Then, the ice-making solution in the inner tube (IT) is cooled by the refrigerant in the outer tube (OT) to generate ice on the inner surface thereof, and the ice accompanies each blade along with the rotating body (D). The rotation of (B) is forcibly scraped.

The outer peripheral surface of the outer tube (OT) is covered with a heat insulating material (M).

(Problems to be Solved by the Invention) In the above ice making device, when each blade (B) is rotated along with the rotating body (D), a negative pressure area is provided on the back side in the rotation direction of each blade (B). In this negative pressure area, the generated ice adheres and grows easily to freeze, and this freeze becomes a rotational resistance of the blades (B), causing a large load on the rotating body (D). However, not only the motor for rotating and driving the rotating body (D) is likely to be overloaded, but also the rotating body (D) may be freeze-locked and the operation may be disabled.

The present invention has been made in view of the above problems, and an object thereof is to prevent a negative pressure region from being generated on the back side in the rotation direction during rotation of a blade associated with a rotating body and to cause freezing. The ice-making device that can be continuously operated without causing overload of the motor or freezing lock of the rotating body can be reliably and smoothly scraped off the ice generated in the inner tube with the blade. To provide.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, an inner pipe (2) for circulating an ice-making solution, and an outer pipe (1) for circulating a refrigerant for cooling the solution, Is installed inside the inner pipe (2),
What is claimed is: 1. An ice making device comprising: a rotating body (4) having a blade (3) in contact with an inner surface of the inner pipe (2), wherein the blade (3) is rotated when the blade (3) is rotated. A plurality of flow holes (5) for flowing the ice-making solution are provided from the front side to the back side in the direction.

The rotating body (4) is provided with a plurality of blades (3A) and (3B), and the contact side tips of the blades (3A) and (3B) are supplied with an ice making solution from the front side to the back side in the rotation direction during rotation. Providing a plurality of flow notches (9a) (9b) for flowing, and the position of the flow notch (9a) in the length direction of the first blade (3A) among the blades (3A) (3B) The position of the flow notch (9b) in the second blade (3B) in the longitudinal direction may be different from each other.

A metal reinforcing plate (10) may be embedded in each of the blades (3A) and (3B).

(Operation) When the blade (3) is rotated to scrape the ice generated in the inner pipe (2), the rotation direction is passed through each flow hole (5) provided in the blade (3). The ice-making solution on the front side flows to the back side, and the back side of the blade (3) is disturbed by the ice-making solution. Therefore, generation of a negative pressure region is suppressed, and ice formation is less likely to occur. As a result, the blade (3) can smoothly scrape off ice, a large load is not applied to the rotating body (4), and the continuous operation can be performed without causing overload or freeze lock of the motor. Done.

Also, as the blade (3), a plurality of first and second blades are provided.
Using these blades (3A) (3B), each of these blades (3A)
On the contact tip side of (3B), a plurality of flow notches (9a) (9b) for flowing the ice making solution from the front side to the back side in the rotation direction are respectively formed at the time of rotation, and the first blade ( 3A) the position of the flow notch (9a) in the longitudinal direction,
When the lengthwise positions of the flow cutouts (9b) in the second blade (3B) are inconsistent with each other, as in the case described above, the blades (3A) are passed through the cutouts (9a) (9b). (3B) The ice-making solution on the front side in the rotating direction is flowed to the back side and disturbed, negative pressure is suppressed and ice formation can be reduced, and each of these notches (9a) Since the (9b) are formed so as to be inconsistent with each other, the produced ice is surely scraped off.

Further, a metal reinforcing plate (1) is attached to each blade (3A) (3B).
0) when installing the blades (3A) (3B)
The blades (3A) and (3B) are strengthened to prevent deformation and the like during ice scraping.

(Example) The ice-making device shown in FIG. 5 has an oblong outer tube (1).
And an inner pipe (2) penetratingly supported inside the outer pipe (1) in a concentric manner, and the outer pipe (1) is provided with a plurality of refrigerant inlets (11) and outlets (12). Together with the inner tube (2)
On both sides in the axial direction of the ice making solution inlet (21) and outlet (2
While 2) is provided, a rotating body (4) having a blade (3) contacting the inner surface of the inner tube (2) is rotatably supported in the inner tube (2).

Further, a drive shaft (41) connected to a motor is provided on one side in the axial direction of the rotating body (4) so that the rotating body (4) is rotationally driven by the drive shaft (41). ing.

Thus, the ice-making solution introduced into the inner pipe (2) is cooled by the refrigerant introduced between the inner pipe (2) and the outer pipe (1), and the inner pipe (2 ) Is generated on the inner surface of the), the ice is scraped off by the blade (3) of the rotating body (4), and the ice is taken out as slurry-like ice from the outlet (22).

Thus, in the above ice making device, as shown in detail in FIGS. 1 and 2, a plurality of flow holes (5) are formed near the contact tip of the blade (3) with the inner pipe (2). , For example, when the rotating body (4) is rotated in the (a) direction, as shown by the arrow in FIG. 1, through the flow holes (5), the rotating direction of the blade (3). The ice-making solution is caused to flow from the front side to the back side so that the back side is disturbed by the ice-making solution, and the disturbance causes a negative pressure region on the back side of the blade (3). To prevent the formation of freezing.

The blade (3) has, for example, a lateral length of 500 m.
m, height 35 mm, thickness 6 mm, oblong shape, and the flow hole (5) provided in the blade (3) has a lateral diameter of 30 mm and a height direction of 5 mm. About five such flow holes (5) are formed in the lateral direction of the blade (3) at equal intervals.

Further, in the embodiment shown in FIG. 1, two supporting members (6) are provided at positions facing each other on the outer peripheral wall of the rotating member (4).
(6) is integrally projected toward the outside in the radial direction, and
As the blade (3), two first and second blades (3A) and (3B) having the flow hole (5) are used, and each of the blades (3A) and (3B) is rotated in the direction of rotation. A cylindrical portion (31) provided on the base side of the support body is swingably supported by a tip end portion of each support body (6) via a shaft rod (7) so as to be directed forward, and each support body is also supported. A spring (8) is interposed between (6) and each blade (3A) (3B), and the tip side of each blade (3A) (3B) is inserted into the inner pipe by each spring (8). The inner surface of (2) is always contacted.

Further, the blades (3A) and (3B) are, as shown in FIG. 3, on the contact tip side with respect to the inner surface of the inner tube (2),
A plurality of rectangular flow cutouts (9a) (9b) are formed, and when the blades (3A) (3B) rotate through the cutouts (9a) (9b), their rotation While making the solution for ice making flow from the front side to the back side in the direction,
The lengthwise position of the flow cutout (9a) in the first blade (3A) and the lengthwise position of the flow cutout (6b) in the second blade (3B) may be different from each other. . That is, each notch (9A) of the first blade (3A)
The convex portion (9c) formed between a) is the second blade (3B)
The notches (9b) of the first blade (3A) are made to face each other while being overlapped with each other, and the protrusions (9d) formed between the notches (9b) of the second blade (3B) are You may make it oppose in the state which overlapped each notch (9a).

Even in the case of the above configuration, the ice making solution on the front side in the rotation direction of the first and second blades (3A) (3B) flows to the back side through the notches (9a) (9b). The rear surface side is disturbed and the generation of negative pressure is suppressed, and as with the above-described embodiment, it is possible to reduce the occurrence of ice formation, and moreover, the respective convex portions (9c) (9d) and Since the notches (9a) and (9b) are formed so as to overlap each other, the produced ice can be scraped off smoothly and reliably.

Further, as shown in FIG. 4, a metallic reinforcing plate (10) may be embedded in each of the blades (3A) and (3B). Although the flow hole (5) and the notches (9a) (9b) are provided in the
You can strengthen the overall strength of each blade (3A) (3B),
It is possible to prevent deformation of each of these blades (3A) (3B) during ice scraping.

(Effects of the Invention) As described above, in the ice making device according to the present invention, the blade (3) for ice scraping is used for ice making from the front side to the back side in the rotation direction when the blade (3) rotates. Since a plurality of flow holes (5) for flowing the solution are provided, the back side of the blade (3) is agitated by the ice-making solution that is flowed from each of these flow holes (5), and a negative pressure is applied to the back side. It is possible to prevent the generation of the area, and to reduce the formation of ice due to the generation of the area. Therefore, it is possible to smoothly scrape off the ice by the blade (3) and support the blade (3). Without overloading (4), the overloading of the motor, freeze lock, and the like are eliminated, and continuous operation can be performed.

Also, as the blade (3), a plurality of first and second blades are provided.
Using these blades (3A) (3B), each of these blades (3A)
On the contact tip side of (3B), a plurality of flow notches (9a) (9b) for flowing the ice making solution from the front side to the back side in the rotation direction are respectively formed at the time of rotation, and the first blade ( 3A) the position of the flow notch (9a) in the longitudinal direction,
When the positions of the flow notches (9b) in the second blade (3B) in the longitudinal direction are inconsistent with each other, the produced ice can be reliably scraped while obtaining the same effect as the above-mentioned case. is there.

Further, a metal reinforcing plate (1) is attached to each blade (3A) (3B).
0) When burying, each blade (3A) (3B)
It is possible to prevent the deformation and the like when the ice is scraped off.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an ice making device according to the present invention, FIG. 2 is an enlarged front view of a blade, FIG. 3 is a blade development view showing another invention, and FIG. 4 is a blade showing another embodiment. FIG. 5 is a side sectional view, FIG. 5 is a partially cutaway front view showing the entire structure of the ice making device, and FIG. 6 is a sectional view showing a conventional example. (1) …… Outer tube (2) …… Inner tube (3) …… Blade (3A) …… First blade (3B) …… Second blade (4) …… Rotating body (5) …… Flow hole (9a) (9b) …… Notch (10) …… Reinforcement plate

Claims (3)

[Claims] 1. An inner pipe (2) for circulating an ice-making solution, an outer pipe (1) for circulating a refrigerant for cooling the solution, and an inner pipe (2) which is provided inside the inner pipe (2). ) And an rotator (4) having a blade (3) contacting the inner surface of the blade (3), the blade (3) having the blade (3).
An ice making device, wherein a plurality of flow holes (5) for flowing the ice making solution are provided from the front side to the back side in the rotation direction of. 2. An inner pipe (2) for circulating an ice-making solution, an outer pipe (1) for circulating a refrigerant for cooling the solution, and an inner pipe (2) which is internally provided in the inner pipe (2). ), And a rotor (4) having a plurality of blades (3A) (3B) in contact with the inner surface of the blade (3A) (3B), the blade (3A) (3A) at the tip of the contact side. ) When rotating (3B),
A plurality of flow notches (9a) (9b) for flowing the ice-making solution are provided from the front side to the back side in the rotation direction, and for the flow in the first blade (3A) among these blades (3A) (3B) An ice making device characterized in that the position of the notch (9a) in the lengthwise direction and the position of the flow notch (9b) in the second blade (3B) in the lengthwise direction are mutually different. 3. A blade (3A) (3B) with a metal reinforcing plate (1
The ice making device according to claim 1 or 2, wherein (0) is buried.