JP3232298B2 - Subcooling release device and ice heat storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supercooling release device such as an ice heat storage device used for the production and processing of foods cooled or refrigerated at the temperature of ice or the temperature of ice in a building.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing an ice heat storage device using a conventional supercooling release device described in Japanese Patent Application No. 1-229519. In the figure, 1 is a refrigerator, 2 is a heat storage tank for storing ice and water, 3 is an aqueous solution to which an additive such as potassium salt or sodium salt is added, which is capable of stably supercooling, 4 is floating in an aqueous solution 3 The ice 5 is a supercooling release device that breaks the supercooled state by, for example, a small-capacity low-temperature generating device. Reference numeral 6 denotes a filter for filtering the ice 4 in the aqueous solution 3, and reference numeral 7 denotes a circulation pump for circulating the aqueous solution 3. The refrigerator 1, the supercooling release device 5, the heat storage tank 2, the filter 6, the circulation pump 7, and the refrigerator 1 from the heat storage tank 2 are connected to the circulation path (distribution path) 8 for guiding the aqueous solution 3.
Pipes) .

Next, the operation will be described. Aqueous solution 3 supercooled to below freezing point several degrees (about -2 ° C) by refrigerator 1
The supercooled state is broken by a supercooling release device 5 guided by the circulation path 8 and provided near the outlet of the circulation path 8 above the heat storage tank 2, for example, a small-capacity low-temperature generating device of about -5 ° C. An amount of ice 4 corresponding to the amount of cooling heat is generated. The ice 4 floats in the upper part of the heat storage tank 2, and the remaining aqueous solution 3 that has not become ice accumulates in the lower part of the heat storage tank 2. Then, the aqueous solution 3 is guided to the refrigerator 1 by the circulation pump 7 through the filter 6, and forms a circulation cycle.

[0004]

As described above, the supercooling release device in the conventional ice thermal storage device is provided with the low-temperature generating device in the thermal storage tank 2 to generate small pieces of ice from the aqueous solution. In order to break the supercooled state and generate the ice 4, it is necessary to guide the unstable aqueous solution 3 in the supercooled state to the supercooled release device in the heat storage tank 2, and to install the supercooled release device in each of the plurality of heat storage tanks 2. Installation was necessary. Therefore, there is a problem that ice is generated in the circulation path (pipe) 8 and the reliability is reduced due to the blockage of the circulation path 8, and the equipment cost is increased due to the supercooling release device installed in each heat storage tank 2. There was a point. Further, there is a problem that a space for installing the subcooling release device in the heat storage tank 2 is required, which hinders downsizing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a low facility cost and a compact size.
Possible bets reduction and reliable high have supercooling release device and its
It is an object of the present invention to provide an ice heat storage device using the same .

[0006]

According to the present invention, there is provided a subcooling canceling device in which a rotating blade or a circulation pump is arranged in a pipe through which supercooled water or an aqueous solution obtained by adding an additive to water passes. Above by the rotor or the pump for circulation
The cavitation is generated in the supercooled water or aqueous solution in the pipe to release the supercooling. Further, the ice heat storage device according to the present invention is a heat storage tank for storing ice and water or an aqueous solution obtained by adding an additive to water,
A refrigerator for supercooling the water or the aqueous solution, and a circulator for circulating the water or the aqueous solution between the heat storage tank and the refrigerator.
Piping , a rotor or a circulation pump is arranged in a pipe through which the supercooled water or aqueous solution passes downstream of the refrigerator, and the rotor or the circulation pump is used.
A supercooling release device configured to generate cavitation in the water or the aqueous solution in the pipe to release the supercooling of the water or the aqueous solution.

[0007]

[Function] Cavitation is a bubble created by evaporating air and the like dissolved in water when the pressure of water or aqueous solution is reduced. When water or aqueous solution returns to the original pressure, it is dissolved in liquid and disappears. At this time, a large impact can be given to the liquid. The supercooling release device according to the present invention includes:
Rotates in a circulation path through which supercooled water or aqueous solution passes
Cavitation is generated in the supercooled water or aqueous solution by placing wings or a circulation pump, and the cavitation is extinguished. I do.

[0008]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG.
FIG. 1 is a configuration diagram showing one embodiment of the present invention. In the figure, reference numeral 9 denotes a supercooling release device configured to generate cavitation in an aqueous solution, and a circulation path (pipe) through which supercooled water or an aqueous solution passes downstream of the refrigerator 1 as shown in the figure. 8. The other configuration is the same as the conventional one, and the description is omitted.

Next, the operation will be described. The aqueous solution 3 subcooled to several degrees below the freezing point by the refrigerator 1 flows into the subcooling release device 9, and cavitation occurs in the aqueous solution 3. Ice 4 is generated in the aqueous solution 3 by the impact when the cavitation disappears. The ice water thus stabilized enters the heat storage tank 2 through the circulation path 8. The ice 4 generated from the ice water floats in the upper part of the heat storage tank 2, and the aqueous solution 3 that has not become ice accumulates in the lower part of the heat storage tank 2. Then, the aqueous solution 3 is guided to the refrigerator 1 by the circulation pump 7 through the filter 6 and forms a circulation cycle.

As described above, in this embodiment, the vicinity of the refrigerator 1
A supercooling release device 9 can be installed in the chiller 1, and the unstable aqueous solution 3 supercooled by the refrigerator 1 is placed in the circulation path 8 in the supercooling release device 9.
In the circulation path 8 leading to the heat storage tank 2, ice is not formed on the pipe wall and the like, so that the pipe line is not blocked. Also, since the supercooling release device 9 can be installed near the refrigerator 1 , even when there are a plurality of heat storage tanks 2, each heat storage
There is no need to install a device for releasing supercooling in each tank.
In addition, the remodeling work of the heat storage tank 2 becomes unnecessary, and for example, a water tank that has stored water can be used as it is. further,
There is also space for installing a device for releasing supercooling in the heat storage tank 2.
It is unnecessary and can be made compact.

Incidentally, as the cavitation generator,
For example, the rotor 10 shown in FIG. 2 can be used. Around the rotor 10, pressure is high in front of the blade,
Cavitation can be generated in the aqueous solution when the rotation speed exceeds a certain number of rotations because the pressure is low behind.

Embodiment 2 FIG. In the above-described embodiment, an example in which cavitation is generated using the rotary wings 10 has been described. However, the circulation pump 7 may be configured to also serve as the subcooling release device 9 as shown in FIG. In this case, the equipment cost for the supercooling release device 9 can be reduced.

[0013]

[0014]

In each of the above-described embodiments, the case where the present invention is applied to the ice heat storage device for storing the generated ice 4 in the heat storage tank 2 has been described. However, the present invention is not limited to this. The present invention may be applied to an ice water supply device in which the generated ice 4 flows without being stored.

[0016]

As described above, the supercool release according to the present invention is released.
According to the apparatus and the ice heat storage device, a pump for a rotary wing or circulated through the piping aqueous solution obtained by adding additives to the supercooled water or water to pass through are arranged, the rotor blade or circulation
Cavitation is generated in the water or aqueous solution in the pipe by the pump for water, and the supercooling of the water or aqueous solution is released, so that unstable supercooled water or aqueous solution is quickly stabilized in the pipe. Since the ice water can be made, for example, ice does not form in the pipe to the heat storage tank and the pipe line is not blocked, and the reliability of the apparatus is improved. Also,
Since the supercooling release device can be installed near the refrigerator, the remodeling work of the heat storage tank is not required, and there is an effect that the equipment cost can be reduced, for example, the water tank storing the water can be used as it is. Further, a space for installing a device for canceling supercooling in the heat storage tank is not required, and the device can be made compact.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an ice heat storage device using a subcooling release device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a subcooling release device according to Embodiment 1 of the present invention.

FIG. 3 is a diagram illustrating a configuration of a subcooling release device according to a second embodiment of the present invention.

FIG. 4 shows an ice heat storage device using a conventional supercooling release device.
FIG.

[Explanation of symbols]

1 refrigerator, 2 heat storage tank, 3 aqueous solution, 4 ice,
5 Low-temperature generator, 6 filter, 7 circulation pump, 8 circulation path, 9 supercooling release device configured to generate cavitation, 10 rotating blades.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-64-90973 (JP, A) JP-A-3-91635 (JP, A) JP-A-4-332363 (JP, A) 236574 (JP, A) JP-A-4-3867 (JP, A) JP-A-1-88235 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 5 / 00-5 / 00 102

Claims (2)

(57) [Claims] 1. A rotating blade or a circulation pump is disposed in a pipe through which supercooled water or an aqueous solution obtained by adding an additive to water passes, and the rotating blade or the circulation pump is provided by the rotating blade or the circulation pump.
A supercooling release device configured to generate cavitation in the water or the aqueous solution in the pipe to release the supercooling of the water or the aqueous solution. 2. A heat storage tank for storing water or an aqueous solution obtained by adding an additive to water and ice, a refrigerator for supercooling the water or the aqueous solution, and circulating the water or the aqueous solution between the heat storage tank and the refrigerator. a pipe for causing, place the rotor blade or a pump for circulating in the piping where water or an aqueous solution, which is the supercooled downstream passes the refrigerator, the rotor blade or循
An ice heat storage device comprising: a supercooling release device configured to generate cavitation in the water or the aqueous solution in the pipe by a ring pump to release the supercooling of the water or the aqueous solution.