JPH07305928A - Sprinkler structure for water trickle type icemaker - Google Patents

Abstract

PURPOSE:To eliminate a malfunction such as generation of an abnormal shape ice, etc., by uniformly feeding water from sprinkling holes. CONSTITUTION:The sprinkler structure for a water trickle type icemaker comprises a sprinkling cylinder body 10 having many sprinkling holes 11a at a bottom plate 11 extended horizontally, a water supply tube coupled to the one end of the body 10, a horizontal plate 15 extended from the lower end of a water supply port 13 along a bottom between the plate 11 and the port 13 of the body or a negative pressure preventing structure for providing a predetermined value or more of a vertical distance value to be decided from a flowing speed from the plate 11 to the lower end of the port 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a downflow type ice making machine for flowing down sprinkled water on a vertically installed ice making plate, and more particularly to a structure of a sprinkler for sprinkling ice making water.

[0002]

2. Description of the Related Art In a downflow type ice making machine, for example, a pair of ice making plates are erected upright back to back, and a refrigerant evaporator is provided between the ice making plates. During the ice making operation, the evaporator cools the ice making water flowing down in front of the ice making plate by the heat of evaporation of the refrigerant, while during the deicing operation, hot gas flows to separate the ice from the ice making plate. An example of a sprinkler used in such a downflow type ice making machine will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view of the sprinkler 1 as seen from below, showing a main body 4 in which an ice making water passage 2 and a deicing water passage 3 are integrally formed, a water supply connector 5, and the passages 2 and 3. It consists of an integrated plug 6 that closes the end. The water supply connector 5 is a base 5 for ice making water.
a and a deicing water mouthpiece 5b, and water flowing in from this is sprinkled from the ice making water sprinkling hole 2a and the deicing water sprinkling hole 3a, respectively. FIG. 5 shows such a sprinkler 1 with two
It is the exploded perspective view seen from the upper side at the time of using it in combination, and the ice making water supply pipe 7 is the base 5a for ice making water of the connector 5.
In addition, the deicing water supply pipe 8 is connected to the deicing water base 5b, respectively. Of course, the water sprinklers 1 are provided according to the number of sets of ice making plates. For example, if five pairs of ice making plates are installed, five water sprinklers 1 are arranged in parallel.

[0003]

In the sprinkler 1 as described above, the ice making water is in the state shown in FIG.
To flow out from the water spray holes 2a formed in the bottom plate, and water is sprayed. The amount of ice-making water that flows in is that which flows out from all of the water spray holes 2a, and since it is a considerable amount, it flows in at a considerable flow rate at the inlet portion. Therefore,
Water sprinkling hole 2 near the water supply port 5c that communicates with the ice making water base 5a
In the vicinity of a, the Venturi effect (in Bernoulli's theorem, since the dynamic pressure is large, the static pressure becomes a negative pressure with respect to the external atmospheric pressure), a negative pressure is generated and various problems occur. For example, in the vicinity of the above, irregularly shaped ice or cloudy ice may be generated due to insufficient ice making, or water may not be sprinkled and no ice may be formed. The present invention has been made in view of the above-mentioned problems of the prior art, and water spouts from each sprinkling hole evenly, and a sprinkler of a downflow type ice maker that does not cause problems such as generation of odd-shaped water. It is intended to provide.

[0004]

In order to achieve such an object, according to the present invention, a horizontally extending bottom plate is provided with a plurality of water spray holes, and a water spray cylinder body is connected to one end of the water spray cylinder body. The water sprinkler of the downflow type ice maker having the water supply pipe is characterized in that a negative pressure generation preventing structure is provided between the bottom plate and the water supply port of the water sprinkler main body. As a structure for preventing negative pressure from being generated adjacent to the water spray holes of the bottom plate, a horizontal plate extending along the bottom surface from the lower end of the water supply port may be provided,
The discharge direction of the water supply may be inclined upward, or
The vertical distance from the bottom plate to the lower end of the water supply port may be a value equal to or larger than a predetermined value determined by the flow velocity.

[0005]

With the above construction, the ice making water that has flowed into the water spray tube main body from the water supply port flows as it is, flows out from the water spray holes of the bottom plate of the main body, and is sprayed onto the ice making plate. When a horizontal plate is provided as the structure for preventing the generation of negative pressure, the water is supplied as it is guided by the horizontal plate, and negative pressure is not generated around the water spray holes on the bottom surface. Also, if the discharge direction of the water supply is inclined upward, or if the bottom plate provided with the water sprinkling hole and the lower end of the water supply port are separated by more than a predetermined value, the flow passage cross-section suddenly changes and negative pressure is applied immediately after the water supply port. Even if it occurs, it does not affect the vicinity of the bottom plate.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, the bottom plate 11 of the sprinkler body 10
A large number of water sprinkling holes 11a are provided in. The horizontal plate 15 is connected to the bottom plate 1 from the lower end of the water supply port 13 which is connected to one end of the main body 10.
It extends parallel to 1 and terminates midway. In such a configuration, the water flowing into the main body 10 from the water supply port 13 flows on the horizontal plate 15. At the terminal end of the horizontal plate 15, the flow passage area is larger than that of the water supply port 13, so that the flow velocity has already decreased and substantially no negative pressure is generated. Of course, even in the vicinity of the water spray hole 11a closest to the inlet side, the horizontal plate 15 separates it from the outlet of the water supply port 13,
Negative pressure does not occur. Therefore, the water that has flowed in flows out substantially uniformly from all the water spray holes 11a and is sprayed.

In the above embodiment, the horizontal plate 15 is provided to form the negative pressure preventing structure, but it may be structured as shown in FIG. In FIG. 2, a large number of water spray holes 21a are formed in the bottom plate 21 of the water spray cylinder body 20 at predetermined intervals. The water supply port 23 is formed so as to be inclined upward with respect to the bottom plate 21 as shown in the figure, and the streamline center of the water flow flowing in from the bottom plate 21 and the water sprinkling hole 21a closest to the water supply port 23 (the leftmost side in the drawing). Vertical distance or distance h
However, the influence of the negative pressure determined by the flow velocity exceeds the value that does not affect the water spray holes 21a. The value of h is experimentally determined in consideration of various factors, and one example of the value is specifically 10 mm or more.
Regarding the inclination of the water supply port described above, the angle of the discharge direction of the water supply from the water supply port is set to 30 ° or more with respect to the bottom plate 21. In such a configuration, the ice making water that has flowed in from the water supply port 23 flows as shown by the arrow, collides with the top plate, and evenly flows out from the water spray holes 21a. In this case, a negative pressure may be generated in the space immediately after the water supply port 23, but since it is separated by the distance h, no negative pressure is generated in the vicinity of the water spray holes 21a of the bottom plate 21 and air is blown through the water spray holes 21a. No inhalation or significant reduction in water sprinkling.

Due to the piping and the like, the water supply port 23 as shown in FIG.
When it is not possible to incline, as shown in FIG. 3, the overall height H of the sprinkling tube main body 30 may be increased and the water supply port 33 may be horizontal. In this case, the ice-making water that has passed through the water supply port 33 flows as shown by the streamlines, but the water supply port and the water spray hole 31 on the most inlet side are provided.
It is important to set the distance h'to a to a predetermined value or more determined by the flow velocity and the shape. This is determined so that immediately after the water supply port 33, even if a negative pressure is generated, the negative pressure does not occur in the vicinity of the water spray hole 31a. Performing experiments with a model is a practical means for determining the distance h '.

[0009]

As described above, according to the first aspect of the present invention, the negative pressure generation preventing structure allows the ice making water to be sprinkled from the sprinkling hole without any air suction from the sprinkling hole. Generation of odd-shaped ice and cloudy ice is prevented. Further, according to the invention of claim 2, since the horizontal plate separates the area near the water spray hole from the mainstream space, negative pressure is prevented from being generated in the area near the water spray hole, and in turn, irregular ice, cloudy ice or the like is generated. Is prevented.

Further, according to the third and fourth aspects of the invention, the discharge direction of the water supply is inclined upward, or the distance from the bottom plate of the sprinkler cylinder body to the water supply port is set to a predetermined value or more. Even if a negative pressure is generated, a negative pressure is not generated in the vicinity of the water spray holes of the bottom plate, and the ice making water flows out evenly from the water spray holes and is sprayed, so that it is possible to prevent generation of irregularly shaped ice or cloudy ice. Further, when the discharge direction of the water supply is inclined upward, the water supply port is directed downward, so that workability is improved and market serviceability is also improved. Moreover, if the water supply port is inclined, its horizontal length is reduced, so that the machine size can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a water sprinkler structure according to an embodiment of the present invention shortened in a length direction.

FIG. 2 is a shortened sectional view showing another embodiment of the invention.

FIG. 3 is a shortened sectional view showing still another embodiment of the present invention.

FIG. 4 is an exploded perspective view showing the structure of a conventional water sprinkler.

5 is an exploded perspective view showing how the water sprinkler of FIG. 4 is used and assembled.

6 is a shortened cross-sectional view for explaining a problem of the water sprinkler of FIG.

[Explanation of symbols]

7 ... Water supply pipe for ice making water, 8 ... Water supply pipe for deicing water, 10 ...
Water spray cylinder body, 11 ... Bottom plate, 11a ... Water spray hole, 13
… Water supply port, 15… Horizontal plate, 20… Sprinkler cylinder body, 2
DESCRIPTION OF SYMBOLS 1 ... Bottom plate, 21a ... Sprinkling hole, 23 ... Water inlet, 30 ...
Water spray cylinder body, 31 ... Bottom plate, 31a ... Water spray hole, 33
… Water supply.

Claims (4)

[Claims] 1. A water sprinkler for a downflow type ice making machine, comprising: a water sprinkler main body having a horizontally extending bottom plate having a plurality of water sprinkling holes; and a water supply pipe connected to one end of the water sprinkler main body. A sprinkler structure for a downflow type ice maker, characterized in that a negative pressure generation preventing structure is provided between the sprinkler main body and the water supply port. 2. The sprinkler structure for a downflow type ice making machine according to claim 1, wherein a horizontal plate extending horizontally from a lower end of the water supply port is provided to prevent the negative pressure from occurring. 3. The water sprinkler for a downflow type ice maker according to claim 1, wherein the negative pressure generation preventing structure is formed by inclining the direction of discharge of the water supply from the water supply port upward with respect to the bottom plate. Vessel structure. 4. The sprinkler structure for a downflow type ice maker according to claim 1, wherein a distance from the bottom plate to a lower end of the water supply port is set to a value larger than a predetermined value to form a negative pressure preventing structure.