JPH03204578A - Ice making device - Google Patents

Abstract

PURPOSE:To unify pushing forces of respective blades against the inner surface of an inner tube, stabilize the ice scraping performance of the blade and effect good ice making operation by a method wherein a pair of blades is supported slidably by a blade guide and a spring is interposed between respective blades. CONSTITUTION:A rotary body 4 is provided with a blade guide 5, penetrating the rotating axis of the rotary body 4 and extending symmetrically to radial outward direction with respect to the axis, while a pair of blades 3, 3 is supported slidably by the blade guide 5. A spring 6 is interposed between respective blades 3, 3 to energize them to radial outward direction respectively. Respective blades 3, 3 are contacted with the inner surface of an inner tube 2 with a uniform pushing force by the spring 6. Accordingly, ice, produced on the inner surface of the inner tube 2, is scraped stably by respective blades and good ice making operation is effected. When respective blades 3 are worn, respective blades 3 can be removed from the guide 5 and replaced simply.

Description

[Detailed description of the invention] (Industrial application field) The present invention is mainly used as a cold source for an air conditioner.

(Prior art) Conventionally, this type of ice making device has been developed, for example, by
As described in Publication No. 8 and shown in Figure 3, an inner tube (IT) through which an ice-making solution flows is arranged inside an outer tube (OT) through which a refrigerant flows, and an inner tube (IT) through which an ice-making solution flows. Inner tube (IT
) in which a plurality of blades (B) are in constant contact with the inner surface thereof.
A rotating body (D) having a rotor (D) is rotatably supported,
The ice-making solution in the inner tube (IT) is cooled by the refrigerant in the inner tube (IT) to generate ice on its inner surface, and this ice is forced by the rotation of each blade (B) accompanying the rotating body (D). I try to scrape it off.

Note that the outer peripheral surface of the outer tube (OT) is coated with a heat insulating material (M).

(Problems to be Solved by the Invention) However, in the above-described ice making apparatus, when the rotating body (D) is assembled into the inner tube (IT), the rotating body (D) may be damaged due to machining errors or the like.
D) is likely to have an axial shank, and when this axial misalignment occurs, each of the blades (D) attached to the rotating body (D)
The pressing force on the inner surface of the inner tube of B) becomes uneven, and the ice scraping performance of each blade (B) becomes unstable, resulting in ice being left behind, and the ice grows and freezes. Freezing acts as a rotational resistance for each of the blades (B) and generates a large load on the rotating body (D), which not only tends to cause an overload of the motor that rotationally drives the rotating body (D), but also causes a slight This may cause the rotating body (D) to freeze and lock, making it impossible to operate.

The present invention has been made in view of the above-mentioned problems, and its purpose is to reduce the pressing force against the inner tube of each blade even if the rotating body is misaligned due to machining errors or the like. It is an object of the present invention to provide an ice making apparatus which can uniformly scrape ice, stabilize the ice scraping performance of each blade, and perform good ice making operation.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes an inner tube (2) through which an ice-making solution flows, an outer tube (1) through which a refrigerant for cooling the solution flows, installed inside the inner tube (2),
In an ice making device comprising a rotating body (4) having a plurality of blades (3) that come into contact with the inner surface of the inner tube (2), the rotating body (4) has a rotating shaft of the rotating body (4). Penetrate the heart,
A blade guide (5) extending symmetrically outward in the radial direction with respect to the axis is provided, and a pair of blades (3) (3) are slidably supported on the blade guide (5).
Between each of the blades (3) (3), each of the blades (3)
(3) radially outwardly biasing springs (
6).

(Function) The blades (3) (3) supported by the blade guide (5) are constantly urged radially outward by the spring (6), and the inner surface of the inner tube (2) Therefore, the ice formed on the inner surface of the inner tube (2) is stably scraped off by each of the blades (3), and good ice-making operation is performed. When each blade (3) becomes worn, it can be easily replaced by removing it from the guide (5).

(Example) The ice making device shown in FIG.
and an inner tube (2) which is supported through a concentric rod inside the outer tube (1), and the outer tube (1) has a plurality of refrigerant intake ports (
11) and an outlet (12), as well as the inner pipe (2).
) is provided with an inlet (21) and an outlet (22) for the ice-making solution on both sides in the axial direction, and a rotating body ( 4) is supported to rotate freely.

Further, a motor (M
) is provided with a drive shaft (4 parts) interlockingly connected to the drive shaft (41), and the rotating body (4) is rotationally driven by the drive shaft (41).

In this way, the ice-making solution introduced into the inner tube (2) is cooled by the refrigerant introduced between the inner tube (2) and the outer tube (1), and the ice-making solution is cooled by the ice-making solution introduced into the inner tube (2). ), this ice is scraped off by the blade (3) of the rotating body (4), and taken out as slurry ice from the outlet (22).

In the above ice making apparatus, as shown in detail in FIG. 1, the rotating body (4) has blades extending symmetrically outward in the radial direction and passing through the rotation axis of the rotating body (4). In addition to installing the guide (5), a cutting edge (31) with an acute angle at the tip is provided on the radially outer side of this blade guide (5).
A pair of blades (3) (3) each having a diameter are slidably inserted and supported, while a coil spring (6) is interposed between each of the blades (3) (3) inside the blade guide (5). They are made to wear clothes.

With the above configuration, each of the blades (3) is always urged radially outward by the spring (6), and the rotating body (4) ), each of these blades (3)
The cutting edges (31) of the inner tube (2) are always in elastic contact with the inner surface of the inner tube (2) with a uniform pressing force, so that each of the cutting edges (31) can stably scrape off ice. When the cutting edge (31) of each blade (3) becomes worn, each blade (3) can be easily replaced by removing the blade (3) from the guide (5).

Each of the blades (3) is formed into a horizontally long flat plate shape, and the blade guide (5) provided penetrating through the rotating body (4) is formed into a horizontally long cylindrical shape.
Each blade (3) is slidably inserted and supported on the outside in the radial direction with its cutting edge (31) projecting outward.

Further, a plurality of blade guides (5) are used, and each of these guides (5) is spaced at a predetermined interval in the length direction of the rotating body (4), and for example, a 90-meter blade is placed between each adjacent guide (5). A pair of blades (3) are supported on the radially outer side of each guide (5).

Furthermore, in the embodiment of FIG. 1, the blade (3)
A stopper (7) is attached to the outside protruding from the guide (5) of the
) is attached, and when ice of a predetermined thickness forms on the inner surface of the inner tube (2) and the blade (3) retreats due to contact with the ice, the stopper (7) is placed in contact with the guide (5). The blades (3) are brought into contact with each other to prevent the blades (3) from retreating by a predetermined amount or more, and the resistance applied to the blades (3) at this time increases the current value of the motor (M) that drives the rotary body (4). Detecting that the temperature rises, and performing a day ice operation based on this detected value, for example, performing a capacity control operation of a compressor that supplies refrigerant into the outer tube (1), or
By supplying hot gas to the inside of the container, the growth of the water above a predetermined amount is suppressed, and efficient ice-making operation is performed.

(Effects of the Invention) As explained above, in the ice making device of the present invention, the rotating body (
4) is provided with a blade guide (5) passing through the rotational axis of the rotating body (4) and extending symmetrically outward in the radial direction;
A pair of blades (3) (3) are attached to this blade guide (5).
), and each of the blades (3)
(3) Since a spring (6) is interposed between the blades (3) and (3) to elastically bias the blades (3) radially outward, the inner tube ( 2) When assembling into the inner pipe, even if the rotating body (4) is misaligned due to machining error or eccentricity due to an assembly error with the inner tube (2), each blade (3) ) can be made uniform on the inner surface of the inner tube, and each of the blades (3) can stably scrape off ice, allowing good ice-making operation to be performed. When the blade (3) is worn out, the blade guide (5)
), each blade (3) can be easily replaced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an ice making apparatus according to the present invention, FIG. 2 is a partially cutaway side view showing the overall structure of the same ice making apparatus, and FIG. 3 is a sectional view showing a conventional example. (1) 11... Umbrella - outer tube (2) (3) (4) (5) (6) Inner tube, blade, rotating body, blade guide, spring Fig. 1 31 Fig. 3

Claims (1)

[Claims] 1) An inner tube (2) through which an ice-making solution flows, an outer tube (1) through which a refrigerant for cooling the solution flows, and an inner tube (2) through which a refrigerant cools the solution.
) and a rotating body (4) having a plurality of blades (3) in contact with the inner surface of the inner tube (2), A blade guide (5) is provided that passes through the rotational axis of the rotating body (4) and extends symmetrically radially outward with respect to the axis, and the blade guide (5) is provided with a pair of blades (3) ( 3), and a spring (6) is interposed between each of the blades (3) and (3) to urge each blade (3) and (3) outward in the radial direction. An ice making device characterized by: