JP2014119210A - Supercooling release device and ice maker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supercooling release device that dispenses with tuning of an oscillation frequency of ultrasonic vibrations, and an ice maker.SOLUTION: A supercooling release device for being attached to a container or piping, through which supercooled water passes, includes an ultrasonic vibration generation unit that has a plane of vibration and an ultrasonic transducer and that can be attached to the container or the piping, and a reflector that has a reflecting surface separated from the plane of vibration and that is fixed in the state of facing the plane of vibration.

Description

  The present invention relates to a supercooling release device and an ice making device.

  In recent years, various facilities using supercooled water have been proposed. For example, in an air-conditioning system, water in a supercooled state is guided into a water tank, and the supercooled state is released in the water tank, thereby producing ice in a slurry state with water and storing the ice. Yes. To release the supercooled state, discharge the supercooled water into the atmosphere and make it collide with a solid surface such as a wall to change the phase, or put a trigger substance in a container to which the supercooled water is introduced ( For example, refer to Patent Document 1) and those using ultrasonic vibration (for example, refer to Patent Document 2). In addition, ultrasonic vibration is used also for the surface washing | cleaning etc. of various products (for example, refer patent document 3-4).

JP 2004-85181 A Japanese Patent No. 3855068 JP 2005-131602 A JP 2000-107710 A

  When an ultrasonic vibrator is attached to a container or pipe through which supercooled water passes, ultrasonic vibrations are attenuated due to irregular reflection in the container or pipe. Therefore, in order to obtain a stable trigger effect, it is necessary to tune the oscillation frequency according to the attachment location.

  This invention is made in view of such a subject, and makes it a subject to provide the supercooling cancellation | release apparatus and ice making apparatus which do not need the tuning of the oscillation frequency of an ultrasonic vibration.

  In order to solve the above problems, in the present invention, a reflecting plate is provided that is separated from the vibration surface of the ultrasonic vibration generating unit having the ultrasonic vibrator and faces the vibration surface.

  Specifically, it is a supercooling release device attached to a container or pipe through which supercooled water passes, and has a vibration surface and an ultrasonic vibrator, and an ultrasonic vibration generator that can be attached to the container or pipe; And a reflecting plate fixed in a state where the reflecting surface is separated from the vibrating surface and faces the vibrating surface.

  In the supercooling release device, the ultrasonic wave emitted from the vibration surface is reflected by the reflection surface. Therefore, when the ultrasonic vibrator is driven with the supercooling release device attached to the container or the pipe, the supercooling water between the vibrating surface and the reflecting surface among the supercooling water passing through the container or the pipe. Is subjected to ultrasonic vibration to produce ice crystals. This ice crystal diffuses as a substance that induces supercooling release, and can induce supercooling release throughout the container or piping.

According to the above-described supercooling release device, the ultrasonic wave for realizing supercooling release is dominated by the wave from the vibration surface and the reflected wave from the reflection surface, and almost no wave from the wall surface in the container or pipe. It does not affect. In the above-described supercooling release device, since the reflecting plate is fixed so that the reflecting surface is separated from the vibrating surface and faces the vibrating surface, the state of the ultrasonic wave generated between the vibrating surface and the reflecting surface is It is hardly affected by the mounting location of the supercooling release device. Therefore, if it is the said supercooling cancellation | release apparatus, it is possible to acquire the stable trigger effect, without performing the tuning according to an attachment location.

  The supercooling release device is a device that is attached to the opening of the container or the pipe, and the ultrasonic vibration generating unit can be attached to the container or the pipe with the vibration surface closing the opening. The reflection plate may be fixed to the ultrasonic vibration generator. In this supercooling release device, since the reflecting plate is fixed to the ultrasonic vibration generating unit, the state of ultrasonic waves generated between the vibration surface and the reflecting surface is hardly affected by the mounting location of the supercooling release device. . Therefore, if it is the said supercooling cancellation | release apparatus, it is possible to acquire the stable trigger effect, without performing the tuning according to an attachment location.

  In addition, the reflection plate may have a size that can pass through the opening in a state where the ultrasonic vibration generation unit is moved in a direction to be attached to the container or the pipe. If it is the supercooling cancellation | release apparatus comprised in this way, it can be set as the state which has arrange | positioned the reflecting plate easily in a container or piping. In addition, maintenance and inspection, device replacement, and the like can be easily performed.

  The reflecting plate has a flat reflecting surface, and the distance between the reflecting surface and the vibrating surface is an odd multiple of a quarter wavelength of the ultrasonic wave emitted by the ultrasonic vibration generating unit. It may be fixed at a position. With the supercooling release device configured as described above, it is possible to obtain a stable trigger effect using resonance.

  Further, the reflecting plate is such that the reflecting surface is a concave curved surface, or the reflecting surface is divided concentrically, and each of the divided reflecting surfaces forms a part of a concave curved surface. There may be. With the supercooling release device configured as described above, the reflected wave reflected from the reflector is concentrated at a specific location, so that the amplitude of the supercooling water is increased and a stable trigger effect can be obtained. .

  Further, the present invention can also be understood from the aspect as an ice making device. That is, the present invention includes, for example, a cylindrical container in which supercooled water flows while swirling spirally, and any one of the above attached to a bottom plate or a top plate of the cylindrical container. It may be an ice making device provided with a supercooling release device.

  When supercooling water continuously flowing into the container or pipe is released by supersonic vibration to achieve continuous ice making, ice crystals do not adhere to the container or pipe. Although a method of ultrasonically vibrating the container or the entire pipe can be considered, it is necessary to generate a large amount of ultrasonic vibration. However, in the above ice making device, the supercooling release device is attached to the axial center portion of the bottom plate or top plate of the cylindrical container through which the supercooling water circulates while spirally rotating. A conical stagnation region is formed around the bottom of the attachment surface of the supercooling release device. In the stagnation region, ice crystals stay for a long time, so ice water whose supercooling has been almost completely released and phase change has stopped circulates, and ice does not adhere to the solid surface. For this reason, continuous ice making can be realized without ice adhering without performing lining or the like on the diaphragm or reflector of the supercooling release device.

  The supercooling release device and the ice making device do not require tuning of the oscillation frequency of ultrasonic vibration.

It is an example of the perspective view of the supercooling release apparatus which concerns on embodiment. It is an example of the block diagram at the time of seeing a supercooling cancellation | release apparatus from the top. It is an example of sectional drawing at the time of cut | disconnecting a supercooling cancellation | release apparatus by the line shown by code | symbol aa in FIG. It is an example of the figure which showed the 1st modification of the overcooling cancellation | release apparatus which concerns on embodiment. It is an example of the figure which showed the 2nd modification of the supercooling release apparatus which concerns on embodiment. It is an example of the perspective view of the ice making apparatus to which the supercooling release device is applied. It is an example of the figure which looked at the ice making apparatus from the lower side. It is an example of sectional drawing at the time of cut | disconnecting an ice making apparatus by the line shown with code | symbol bb in FIG. It is an example of the figure which showed the mode in the ice making apparatus when supercooling cancellation | release is performed.

  Hereinafter, embodiments of the present invention will be described. Embodiment shown below is an example of embodiment of this invention, and does not limit the technical scope of this invention to the following aspects.

<Embodiment of supercooling release device>
FIG. 1 is an example of a perspective view of a supercooling release device 1 according to an embodiment of the present invention. As shown in FIG. 1, the supercooling release device 1 includes an ultrasonic vibration generating unit 2 that generates ultrasonic vibrations and a reflector 3 that reflects the ultrasonic waves. The ultrasonic vibration generating unit 2 includes a vibration plate 4 that can be attached so as to close an opening of a container or a pipe to which the supercooling release device 1 is attached, and an ultrasonic vibrator 5 attached to the vibration plate 4. The diaphragm 4 vibrates by driving the ultrasonic vibrator 5. The ultrasonic transducer 5 emits ultrasonic waves, and any existing ultrasonic transducer can be applied. For example, in the case of a type called a Lange plate type ultrasonic vibrator, the entire vibration surface 4S can be vibrated to emit a planar wave. The reflection plate 3 is a member fixed to the vibration plate 4 via the support column 6 so as to face the vibration surface 4S, and reflects the ultrasonic wave emitted from the vibration surface 4S to the vibration surface 4S. It has a reflective surface 3S. The reflector 3 moves in the direction in which the ultrasonic vibration generator 2 is attached to the container or the pipe, and is large enough to pass through the opening when the diaphragm 4 is attached to the opening provided in the container or the pipe. Is formed. The reflecting surface 3S is a plane parallel to the vibrating surface 4S, and reflects the ultrasonic waves emitted from the vibrating surface 4S in the opposite direction. The purpose of the reflecting surface 3S is to obtain a larger amplitude than when there is no reflecting plate 3 by superimposing the reflected wave on the wave emitted from the vibrating surface 4S. In order to prevent obstructing the flow of the supercooled water or the ice water slurry that has been released from the supercooling, it is preferable to install the reflector 3 so as to be parallel to the direction of the water flow. Further, the reflection plate 3 may be fixed at least during ultrasonic emission. Further, the reflector 3 may be fixed to the container or the pipe instead of the diaphragm 4.

  FIG. 2 is an example of a configuration diagram when the supercooling release device 1 is viewed from above. The ultrasonic transducer 5, the diaphragm 4 and the reflector 3 are circular when viewed from above. Moreover, the attachment hole 8 and the support | pillar 6 for attaching the supercooling cancellation | release apparatus 1 are arrange | positioned in the suitable location which can ensure structural strength. In addition, the support | pillar 6 may be anything as long as it has the intensity | strength which can fix the reflecting plate 3, For example, you may make a cross-section into a streamline shape so that it may not become the flow resistance of supercooling water. .

FIG. 3 is an example of a cross-sectional view of the supercooling release device 1 taken along the line aa in FIG. Since any existing ultrasonic transducer 5 can be applied, the internal structure of the ultrasonic transducer 5 is not shown in FIG. As shown in FIG. 3, the supercooling release device 1 is provided with an O-ring groove 7 in the diaphragm 4. Therefore, by attaching the supercooling release device 1 with the O-ring fitted to the O-ring groove 7 to the container or the pipe with the bolts passing through the mounting holes 8, the watertightness of the flow path through which the supercooling water flows can be secured. It is.

  The supercooling release device 1 includes the reflection surface 3S that reflects the ultrasonic wave emitted from the vibration surface 4S to the vibration surface 4S, so that cavitation easily occurs between the vibration surface 4S and the reflection surface 3S. To do. Further, since the reflecting plate 3 fixed to the ultrasonic vibration generating unit 2 via the support column 6 forms the reflecting surface 3S at a certain distance from the vibrating surface 4S, the wave from the vibrating surface 4S and the reflecting surface 3S are formed. The degree of overlap with the reflected wave from is not dependent on the shape or the like of the container or piping to which the supercooling release device 1 is attached. For this reason, it is possible to easily induce a phase change of the supercooling water between the vibration surface 4S and the reflecting surface 3S and to cancel the supercooling.

  The distance A between the reflecting surface 3S and the vibrating surface 4S can change the phase of the supercooled water flowing between the reflecting plate 3 and the vibrating plate 4 with the ultrasonic waves of the ultrasonic vibrator 5. Any distance can be used. However, the purpose of the reflecting plate 3 is to obtain a large amplitude by superimposing the wave emitted from the vibration surface 4S and the reflected wave reflected from the reflecting surface 3S. Therefore, if the distance A between the reflecting surface 3S and the vibrating surface 4S is large, the attenuation amount of the reflected wave by the reflecting surface 3S and the diffusion amount to the surroundings increase, and the wave emitted from the vibrating surface 4S and the reflecting surface 3S The effect of superimposition with the reflected wave reflected is reduced. Therefore, it is desirable that the distance A between the reflecting surface 3S and the vibration surface 4S is appropriately determined in consideration of the specifications of the container or piping to which the supercooling release device 1 is attached, the supercooling water flow rate, and the like.

  Further, in order to increase the amplitude by superimposing the wave emitted from the vibration surface 4S and the reflection wave reflected from the reflection surface 3S, for example, the waveform of the reflection wave reflected from the reflection surface 3S is changed to the vibration surface 4S. It is preferable to overlap with the waveform of the wave emitted from, and more preferably, a standing wave is formed between the vibration surface 4S and the reflection surface 3S. In order for the waveform of the reflected wave reflected from the reflecting surface 3S to overlap the waveform of the wave emitted from the vibrating surface 4S to form a standing wave, between the reflecting surface 3S and the vibrating surface 4S. The distance A is set as follows.

That is, since the diaphragm 4 is solid, it acts as a fixed end in the standing wave phenomenon. Therefore, in order for the waveform of the reflected wave reflected from the reflecting surface 3S to overlap the waveform of the wave emitted from the vibrating surface 4S to form a standing wave, the reflecting surface 3S and the vibrating surface 4S are The distance A between them is, for example, a distance that is an odd multiple of a quarter wavelength of the ultrasonic wave emitted by the ultrasonic transducer 5, that is, a distance that satisfies the following expression (1).

The ultrasonic frequency n and the ultrasonic wavelength λ satisfy the following expression (2). Therefore, when determining the distance A between the reflecting surface 3S and the vibrating surface 4S based on the above equation (1), the frequency of the ultrasonic wave oscillated by the ultrasonic transducer 5 according to the following equation (2). Note also n and the speed of sound c in the supercooled water.

By setting the distance A between the reflecting surface 3S and the vibrating surface 4S to satisfy the above formula (1), the vibrating surface 4S is located between the vibrating surface 4S and the reflecting surface 3S. A standing wave is formed in which 3S becomes a wave node. In the resonance state in which such a standing wave is formed, strong cavitation occurs due to a large pressure amplitude in the antinode portion of the wave, and the phase change of the supercooling water between the vibrating surface 4S and the reflecting surface 3S is easy. It is possible to release the supercooling.

  Note that the speed of sound of ultrasonic waves passing through water can change according to changes in water temperature. However, as shown in the above equation (1), the parameters for making the resonance state are only the preset distance between the vibration surface 4S and the reflection surface 3S and the wavelength of the ultrasonic wave in water. Therefore, when the speed of sound in water changes due to a change in water temperature, it is possible to form a standing wave by finely adjusting the frequency according to the water temperature.

<First Modification of Supercooling Release Device>
FIG. 4 is an example of a diagram showing a first modification of the supercooling release device 1. In the supercooling release device 1A according to the first modification, the reflecting surface 3SA of the reflecting plate 3A is a concave curved surface. Since other configurations are the same as those of the supercooling release device 1 according to the above-described embodiment, the same reference numerals are given and description thereof is omitted.

  The reflecting surface 3SA is a concave curved surface so that the reflected wave of the ultrasonic wave emitted from the vibration surface 4S is concentrated on a specific location. By converging the reflected wave of the ultrasonic wave to a specific location, a large amplitude is obtained at the specific location and strong cavitation occurs. Therefore, for example, if the concave curved surface forming the reflecting surface 3SA is a parabolic shape such as a parabolic surface forming a reflector of a so-called parabolic antenna, the reflected ultrasonic wave is converged to one point. It is possible to generate stronger cavitation.

<Second Modification of Supercooling Release Device>
FIG. 5 is an example of a diagram showing a second modification of the supercooling release device 1. In the supercooling release device 1B according to the second modification, the reflection surface 3SB of the reflection plate 3B is concentrically divided, and the reflection surfaces 3SB-1, 2, 3, and 4 of the divided regions are respectively concave. Form part of a curved surface. Since the reflection surface 3SB of the reflection plate 3B is concentrically divided like a Fresnel lens, the reflection surface 3SB has a saw-like shape when viewed in cross section. In addition, since it is the same as that of the supercooling cancellation | release apparatus 1 which concerns on the said embodiment about another structure, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The reflective surface 3SB is converged to a specific location where the reflected wave of the ultrasonic wave emitted from the vibration surface 4S converges to a region on a straight line connecting the center of the vibration surface 4S and the center of the reflection surface 3SB. The reflecting surfaces 3SB-1, 2, 3, and 4 in the respective regions are each formed as a part of a concave curved surface. By converging the reflected wave of the ultrasonic wave to a region on a straight line connecting the center of the vibration surface 4S and the center of the reflection surface 3SB, a large amplitude is obtained in the straight region and strong cavitation occurs. To do. Thus, the reflective surface 3SB can generate strong cavitation by concentrating the reflected wave of the ultrasonic wave on the linear region.

<Application example of supercooling release device>
FIG. 6 is an example of a perspective view of an ice making device 10 to which the supercooling release device 1 is applied. Although this application example shows a case where the supercooling release device 1 according to the above embodiment is applied, the ice making device 10 is related to the supercooling release device 1A according to the first modification example and the second modification example. It can be applied to any of the supercooling release devices 1B.

  The ice making device 10 includes a cylindrical supercooling release container 11. The supercooling release container 11 is a sealed cylindrical container with an upper part and a lower part closed. An inflow port 12 for allowing supercooling water to flow in is provided on the lower side of the side, and the supercooling release container 11 is provided on the upper side. An outlet 13 is provided for allowing the ice-water slurry generated by releasing the cooling state to flow out.

In addition, the attachment angle of the inflow port 12 and the outflow port 13 is set as follows. FIG. 7 is an example of a view of the ice making device 10 as viewed from below. As is clear from FIG. 7, the inlet 12 has an axial center of the inlet 12 of the supercooling release container 11 so that the supercooling water flows into the container along the inner peripheral surface of the supercooling release container 11. It is attached along the tangent of the peripheral surface. Further, as is apparent from FIG. 7, the outlet 13 is generated when the ice water slurry generated in the container flows into the container along the inner peripheral surface of the supercool release container 11. The axial center of the outlet 13 is attached along the tangent of the peripheral surface of the subcooling release vessel 11 so that it can easily flow out of the vessel on the spiral swirling flow.

  Moreover, the attachment position of the inflow port 12 and the outflow port 13 is set as follows. FIG. 8 is an example of a cross-sectional view of the ice making device 10 taken along the line indicated by the reference sign bb in FIG. Since the ice water slurry generated in the container has a specific gravity lighter than that of the supercooled water, the outlet 13 is disposed above the inlet 12 as is apparent from FIG. The inlet 12 is disposed on the lowermost side of the supercooling release container 11 and the outlet 13 is located on the uppermost side of the supercooling release container 11 so that the capacity of the supercooling release container 11 is not wasted. Be placed.

  The supercooling release device 1 is attached to an opening 9 provided at the center of the bottom of the supercooling release container 11 configured as described above. Therefore, when the supercooling release device 1 is operated in a state where the supercooling water is circulated in the supercooling release container 11, the supercooling state is released in the lower part of the supercooling release container 11, and ice water slurry starts to be generated. . Since the opening 9 is circular and has a diameter larger than that of the reflector 3, the reflector 3 is attached when the ultrasonic vibration generator 2 is attached to the supercooling release container 11. It can be easily inserted into the opening 9. Thereby, the supercooling release device 1 can be easily attached and detached, and maintenance and inspection and device replacement can be easily performed. Although not shown, a water drain pipe provided with a water drain valve is provided in the flow path on the downstream side of the supercool release container 11, and the upstream side of the supercool release container 11 is provided for maintenance inspection and replacement. The valve provided in the flow path is closed and the drain valve is opened to discharge the water in the supercooling release container 11.

  In addition, the shape of the supercooling cancellation | release container 11, the inflow port 12, and the outflow port 13, a position, etc. are not limited to these. For example, as another shape of the container that realizes continuous ice making by swirling flow, a conical container can be cited. In addition, if the supercooling release device 1 is used as a simple supercooling release trigger, the supercooling release device 1 stores various shapes of containers and piping, and further stores supercooled water whose flow has stopped. You may apply to a container, piping, etc. In addition, the ice making device 10 may be turned upside down, or the direction of the inflow port 12 and the outflow port 13 may be changed so that the spiral swirl flow is reversed.

  FIG. 9 is an example of a diagram illustrating a state in the ice making device 10 when the supercooling is released. When the supercooling release device 1 is operated with the supercooling water flowing in the supercooling release container 11 of the ice making device 10, the supercooling release is performed by cavitation, and the vibration surface 4S and the reflecting surface 3S are interposed. Fine ice crystals are produced. In the supercooling release container 11, a spiral swirl flow toward the upper part is generated, so that ice crystals generated by cavitation flow out from between the vibration surface 4S and the reflection surface 3S and ride on the swirl flow in the container. And the phase of the supercooling water in the supercooling release vessel 11 is changed. Once such an ice-making state has been reached, the generated ice crystals serve as a trigger for releasing new supercooling, so that the supercooling water that newly flows into the supercooling release container 11 even if the ultrasonic vibration is stopped. The effect of releasing continuously continues. Therefore, once the ice-making state is established, even if the supercooling release device 1 is stopped, the ice water slurry continues to flow out from the outlet 13 simply by continuing to feed the supercooling water to the inlet 12.

In addition, the ice making device 10 sets the flow rate of the supercooling water or the shape or size of the supercooling release container 11 so that the time until the water flowing in from the inlet 12 reaches the outlet 13 is 4.1 seconds. You may adjust. 4.1 seconds is the time required for crystal growth of ice nuclei until the degree of supercooling reaches 0 in the supercooled water that has started phase change, and is disclosed in, for example, Japanese Patent No. 3855068. It is a value. The crystal growth rate is independent of the presence or absence of ultrasonic waves, and is determined only by the supercooling water temperature. Therefore, if the temperature of the supercooling water flowing in from the inlet 12 is the same, the time until the supercooling is released is the same regardless of how the trigger is applied. As a result of the demonstration experiment on the ice making device 10, when the supercooling water has a supercooling degree of 2.0 K, the ice making device 10 is controlled to adjust the flow rate so that the residence time in the supercooling release container 11 is 4.1 seconds. When the cooling release device 1 was operated, it was confirmed that the ice making operation can be stably continued without blocking the path. In addition, the output density of the ultrasonic wave of the supercooling release device 1 at this time is 31.4 kW / m ² .

  By the way, in the supercooled water in which the phase change is in progress, the generated ice crystals are likely to adhere to the solid surface, so that the flow path is likely to be blocked. Therefore, the ice making device 10 prevents the generated ice crystals from adhering to the inner surface of the supercooling release container 11 by lining the inner surface of the supercooling release container 11 with a resin material having a low thermal conductivity, for example. It is preferable to do. Examples of the resin material having a small thermal conductivity include PVC (polyvinyl chloride: thermal conductivity 0.14 W / mK), acrylic resin (thermal conductivity 0.18 W / mK), and ABS resin (thermal conductivity 0.18 W / mK). mK) and the like.

  In addition, the diaphragm 4 and the reflector 3 of the supercooling release device 1 are metal materials (for example, SUS304, SUS316, various aluminum alloys) that have no risk of corrosion in water because they emit or reflect ultrasonic waves. Etc.), and in order to prevent attenuation of ultrasonic waves, it is not preferable to apply lining or the like to the surface. Here, since the metal material has a large thermal conductivity, it may seem that there is a concern about the adhesion of ice. However, as in the ice making device 10 according to this application example, when the supercooling release device 1 is attached to the axial center portion of the bottom plate or top plate of the cylindrical container in which the supercooled water flows while spirally swirling, Around the supercooling release device 1, a conical stagnation region with the mounting surface of the supercooling release device 1 as the bottom is formed. In the stagnation region, ice crystals stay for a long time, so ice water whose supercooling has been almost completely released and phase change has stopped circulates, and ice does not adhere to the solid surface. For this reason, ice does not adhere even if the diaphragm 4 and the reflecting plate 3 of the supercooling release device 1 are not subjected to treatment such as lining.

  Note that such a stagnation region may not be formed depending on the application target of the supercooling release device 1. In this case, it is preferable to appropriately perform lining as necessary.

1, 1A, 1B ··· Supercooling release device 2 · Ultrasonic vibration generator 3 · Reflector 3S, 3SA, 3SB · · Reflecting surface 4 · Vibrating plate 4S · · Vibrating surface 5 · · Ultrasonic vibrator 6 ·· Support 7 · · O-ring groove 8 · Mounting hole 9 · Opening portion 10 · Ice making device 11 · Supercooling release container 12 · Inlet 13 · · Outlet

Claims (7)

A supercooling release device attached to a container or piping through which supercooled water passes,
An ultrasonic vibration generator having a vibration surface and an ultrasonic vibrator, and attachable to the container or the pipe;
A reflecting plate fixed in a state where the reflecting surface is separated from the vibrating surface and faces the vibrating surface;
Supercooling release device. The supercooling release device is a device attached to the opening of the container or piping,
The ultrasonic vibration generating unit can be attached to the container or pipe in a state where the vibration surface closes the opening,
The reflector is fixed to the ultrasonic vibration generator.
The supercooling release device according to claim 1. The reflector has a size capable of passing through the opening in a state where the ultrasonic vibration generator is moved in a direction to be attached to the container or pipe.
The supercooling release device according to claim 2. The reflecting plate is such that the reflecting surface is a plane, and the distance between the reflecting surface and the vibrating surface is an odd multiple of a quarter wavelength of the ultrasonic wave emitted by the ultrasonic vibration generating unit. Fixed in,
The supercooling release device according to any one of claims 1 to 3. The reflecting plate is a curved surface having a concave reflection surface,
The supercooling release device according to any one of claims 1 to 4. In the reflecting plate, the reflecting surface is divided concentrically, and each of the divided reflecting surfaces forms a part of a concave curved surface.
The supercooling release device according to any one of claims 1 to 5. A cylindrical container in which supercooled water flows while spirally swirling;
The supercooling release device according to any one of claims 1 to 6, which is attached to a shaft center portion of a bottom plate or a top plate of the cylindrical container.
Ice making equipment.

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