JPH10288434A - Ice storage apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always purify water in a storage tank and prevent the water in the tank from being contaminated with an elapse of time by guiding the water extracted from the storage tank into a purifying means, filtering off and adsorbing rust and impurities contained in the water by the purifying means and returning the water to the storage tank by a pressure conveyor means and a feeding-back means. SOLUTION: An ice storage apparatus is provided with an ice making device 2 equipped with a water spraying means 8 for feeding water 6 in a storage tank 1 to a low temperature heat transfer face 3 and a crushing device 10 for allowing a plate-shaped ice formed on the heat transfer face 3 to fall to be crushed is installed in a lower part thereof. The water 6 in the storage tank 1 is always extracted from a water outlet 11 to filter and adsorb rust and impurities contained in the water by active carbon 17 in a purifying device 13 before being returned to the storage tank 1 through a pump 23 and a pipe 27 so that the water 6 is prevented from being contaminated in an elapse of time. The purifying tank 13 is provided with a drain outlet 26 so as to discharge out of a system the water 6, which is comparatively more contaminated, separated and stored in chamber 19, 20 in the purifying device 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is economical in that ice is used as a cold heat source that can be used for cooling in summer, for example, by using inexpensive electric power at night and this ice is stored in a storage tank. Ice storage systems that provide high-quality air conditioning and cold heat supply.
The present invention relates to an ice heat storage device that can be reliably prevented with a simple configuration.

[0002]

2. Description of the Related Art Recently, ice has been produced as a cold heat source which can be used for cooling in summer, for example, by using low-cost electricity at night, and this ice is stored in a storage tank, so that economical air-conditioning and cooling can be achieved. An ice thermal storage device for supplying has been proposed.

[0003] In this type of ice thermal storage device, part of the water stored in the storage tank is converted into ice by using cheap electric power at night and the ice is thawed during a cooling load in the daytime. Then, cold water is taken out, sent to the air conditioning load mainly in the form of cold water, and the high temperature water is guided again to the storage tank to perform a circulation operation for lowering the temperature.

[0004] In this case, a steel pipe coated with zinc is often used for transporting the produced cold water. However, when used for many years, zinc oxide generated by oxidization of a zinc component and a welded portion of the steel pipe are used. Iron oxide (rust) generated from etc.
Impurities precipitate in water.

[0005] In addition, various coatings and heat insulating materials are also used on the surface of the storage tank, and various components also precipitate on the water side from the surface. Furthermore, when used for a long period of time, the occurrence of algae in water is also observed.

[0006] As described above, once the water in the storage tank is injected, it is usually used for a long period of one year or more in a closed loop condition. On the other hand, it is also possible to inject chemicals for suppressing rust generation and controlling water quality.

However, when the chemical is injected, the water in the storage tank becomes a special solution (which is treated as industrial waste when discharged). For this reason, there are inconveniences that a special operation is required and that it cannot be used as domestic water at the time of a disaster such as an earthquake.

More recently, dynamic ice making type ice thermal storage devices for producing sorbet-like ice and coarse ice have been proposed, and in such ice making technology, rust existing in water has been proposed. , Zinc oxide, various precipitated components, and the like are factors that inhibit ice making.

FIG. 3 is a schematic diagram showing an example of the configuration of a harvest type ice heat storage device which is a typical example of a dynamic ice making method according to the prior art of this type. In FIG. 3, an ice making device 2 is installed above a storage tank 1 for storing ice water therein.

The ice making device 2 has a low-temperature heat transfer surface 3, and a lower temperature medium is circulated from the refrigerator 4. A water sprinkling device 8 for supplying water 6 pumped from a storage tank 1 by a water circulation pump 5 to a low-temperature heat transfer surface 3 through a pipe 7 is provided above the ice making device 2. A crusher 10 for crushing and dropping the plate-like ice 9 produced on the low-temperature heat transfer surface 3 is provided below the lower part 2.

Therefore, in the ice heat storage device having such a configuration, the water 6 of the storage tank 1 is sprinkled on the low-temperature heat transfer surface 3, and the dirt component contained in the water 6 is mixed with the water 6. Is supplied to

For this reason, there is a problem that dirt easily accumulates on the surface of the heat transfer surface 3 and lowers the heat transfer performance and causes an obstacle for detachment of ice. Therefore, in the conventional ice heat storage device, a filter or a strainer is installed in the water circulation line from the viewpoint of removing dust, rust, and the like in the water 6.

However, sufficient measures have not been taken with respect to extremely fine particles and water-soluble components, which are the basic factors of water quality deterioration, and as a result, the ice-making ability decreases over time, I am embarrassed that I cannot do it.

On the other hand, in the water circulation line at the time of ice making and melting,
It is conceivable to provide some countermeasures, but even if such measures are taken, they will only work during ice-making and de-icing operations, and it will not be possible to optimize the water flow rate. There is a situation in which performance without performance is also an inadequate measure.

[0015]

As described above, the conventional ice heat storage device has a problem that the ice making capacity decreases with time due to the deterioration of water quality. SUMMARY OF THE INVENTION An object of the present invention is to reliably prevent a time-dependent decrease in ice-making capacity due to deterioration of water quality with a simple configuration, and to use water in a storage tank as domestic water in the event of a disaster or water in a drain. An object of the present invention is to provide an extremely reliable ice heat storage device capable of reducing processing costs and ensuring environmental safety.

[0016]

In order to achieve the above object, first, in the invention according to claim 1, a part of the water stored in the storage tank is converted into ice by ice making means, and the ice is converted to ice. In an ice heat storage device adapted to be stored in a storage tank, a removal means for extracting water from the storage tank, a pressure feeding means for pumping the water, a purification means having a purification element for purifying the water, and a purification treatment by the purification means A water quality maintaining device comprising a return means for returning the later water to the inside of the storage tank again is provided as an independent water circulation system.

Therefore, in the ice heat storage device according to the first aspect of the present invention, water is taken out of the storage tank by the extraction means and guided to the purification means, and the purification means filters and adsorbs rust and impurities contained in the water. After that, the water inside the storage tank can be always purified by returning it to the storage tank again by the pressure feeding means and the return means, so that it is possible to prevent temporal contamination of the water inside the storage tank.

[0018] This makes it possible to keep impurities and rust and other pollutants dissolved in the water inside the storage tank at a concentration below a specified value, thereby preventing a decrease in ice-making ability due to deterioration of water quality.
The use as domestic water in the event of a disaster can be simplified.

According to a second aspect of the present invention, in the ice heat storage device of the first aspect, a purifying means is provided between the take-out means and the pressure feeding means, and the purifying means is provided with a purifying means. At least two water outlets for removing water containing a large amount of components other than water and dirt separated by
There are two places.

Therefore, in the ice heat storage device according to the second aspect of the present invention, the water is taken out of the storage tank by the take-out means, then passed through the purifying means, and then guided to the pumping means such as a pump. Is equipped with two water outlets for taking out water containing a large amount of components other than separated dirt and water.
By providing two or more, it is possible to purify water before being subjected to agitation of water by a pump or other pumping means, and to take out water containing a large amount of components other than dirt and water out of the system. Water can be washed, and stable ice making performance can be maintained for a long time.

According to a third aspect of the present invention, in the ice heat storage device according to the first or second aspect, activated carbon is used as a purification element of the purification means.
Therefore, in the ice heat storage device of the invention corresponding to claim 3, it is possible to adsorb and remove surfactant and zinc oxide fine powder contained in water by using activated carbon as a purification element of the purification means. Therefore, it is possible to remove a molten component that cannot be sufficiently separated by a filter or a strainer.

According to a fourth aspect of the present invention, in the ice heat storage device according to the first or second aspect, an ion exchange resin is used as a purifying element of the purifying means.

Therefore, in the ice heat storage device according to the invention, it is possible to adsorb and remove acidic and alkaline components contained in water by using an ion exchange resin as a purifying element of the purifying means. Therefore, it is possible to remove a molten component that cannot be sufficiently separated by activated carbon, a filter, and a strainer.

According to a fifth aspect of the present invention, in the ice heat storage device according to any one of the first to fourth aspects, the pressure of water on the upstream side and the downstream side of the purifying means is reduced. Control means for measuring and monitoring the differential pressure between the two, and outputting an alarm when the differential pressure value exceeds a predetermined value is added.

Therefore, in the ice heat storage device according to the fifth aspect of the present invention, the differential pressure of water before and after the purifying means is measured, and the differential pressure is monitored, and when the differential pressure exceeds a predetermined value. By outputting an alarm, the performance and life of the purifying means can be grasped, and the cleaning time of the cleaning means and the replacement time of the contents can be substantially detected.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. (First Embodiment) FIG. 1 is a schematic diagram showing a configuration example of an ice heat storage device according to the present embodiment. The same parts as those in FIG. Now, only the different parts will be described.

In FIG. 1, a water intake 11 for taking out water 6 inside the storage tank 1 is provided on a side surface of the storage tank 1, and one end of a pipe 12 is connected to the water intake 11 to constitute an extraction means. I have.

The pipe 12 is provided with a valve 14 and a strainer 15 for filtering relatively large dust and rust. On the other hand, the inside of the purifying device 13 is divided into three parts in the direction of gravity (vertical direction) as shown in the drawing by a filter 16 for removing fine dust, and the three divided central parts purify water. Activated carbon 17 as a purification element to be treated is filled.

The other end of the pipe 12 is connected to a room 19 on the upstream side of the activated carbon filling unit 18 and is connected to the room 2 on the downstream side.
0 is connected to one end of a pipe 21. Furthermore, piping 2
1 is provided with a valve 22, and the other end is connected to a pump 23 as a pumping means for pumping the water 6.

The upper flange 24 of the purifier 13
A water outlet (hereinafter referred to as a drain outlet) 26 for taking out water (drain) containing a large amount of components other than dirt and water separated by the purification device 13 is provided at the lower flange 25.
Are provided in at least two places (in this example, two places).

Here, the pipes 12 and 21 are not connected to the upper flange 24 and the lower flange 25, but are connected to the side surfaces of the purification device 13, respectively. Further, the water 6 which has been pressurized by the pump 23 and has been subjected to the purification treatment by the purification device 13 is returned to the inside of the storage tank 1 again through the pipe 27 as a return means.

Such a water quality maintaining device is provided as a water circulation system independent of the original water supply circulation system. next,
The operation of the thus configured ice heat storage device of the present embodiment will be described.

In FIG. 1, the water 6 in the storage tank 1 is constantly taken out of the water intake 11 and guided to the purification device 13. The activated carbon 17 inside the purification device 13 removes rust and impurities contained in the water. Filtered and adsorbed.

After that, it is returned to the storage tank 1 again via the pump 23 and the pipe 27. Thereby, the water 6 inside the storage tank 1 is washed and is always kept clean, so that the temporal contamination of the water inside the storage tank 1 can be prevented.

The water 6 is taken out of the storage tank 1 at the outlet 11 and then passed through the purifier 13 before being guided to the pump 23. There are provided two drain outlets 26 for taking out water 6 containing a large amount of the above components.

Accordingly, the water 6 before being subjected to the agitation of the water by the pump 23 is purified, and the water 6 containing a large amount of components other than dirt and water is taken out of the system as required. Since relatively dirty water 6 separated and stored in the chambers 19 and 20 inside 13 is discharged to the outside of the system, the water 6 can be washed more effectively, and stable ice making performance is maintained for a long time. be able to.

Further, as a purifying element of the purifying device 13,
Activated carbon 17 is used. As a result, the surfactant and the fine powder of zinc oxide contained in the water 6 are adsorbed and removed, so that the molten components that cannot be sufficiently separated by the filter or the strainer can be removed.

Furthermore, the main pipes 12 and 21 are not connected to the upper flange 24 and the lower flange 25 of the purification device 13. Thereby, replacement of the activated carbon 17 inside the purification device 13 can be easily performed.

As described above, in the present embodiment, the water 6 is taken out of the storage tank 1 at the outlet 11 and
After the rust and impurities contained in the water 6 are filtered and adsorbed by the purifier 13, the water is returned to the storage tank 1 again by the pump 23 and the pipe 27. Can be purified at all times, so that the water 6 in the storage tank 1 can be prevented from being contaminated with time.

As a result, impurities and rust and other pollutants dissolved in the water 6 in the storage tank 1 can be maintained at a concentration below a specified value, so that a decrease in ice-making capacity due to deterioration of water quality can be prevented, and in the event of a disaster, The use of the water 6 in the storage tank 1 as domestic water is also simplified.

Further, the water 6 is taken out of the storage tank 1 at the outlet 11 and then passed through the purifying device 13 before being guided to the pump 23, and the separated dirt and components other than water are supplied to the purifying device 13. Is provided with two drain outlets 26 for taking out the water 6 containing a large amount of water, the water 6 before being subjected to stirring of the water 6 by the pump 23 is purified, and the water 6 containing a large amount of components other than dirt and water. Can be taken out of the system as needed, so that the water 6 can be more effectively washed, and stable ice making performance can be maintained for a long period of time.

Further, as a purification element of the purification device 13,
Since activated carbon 17 is used, it is possible to adsorb and remove surfactants and fine powder of zinc oxide contained in water 6, and it is possible to remove molten components that could not be sufficiently separated with a filter or strainer. Becomes

Further, since the main pipes 12 and 21 are not connected to the upper flange 24 and the lower flange 25 of the purifier 13, the activated carbon 17 inside the purifier 13 can be easily replaced. Become.

As described above, in the conventional ice heat storage device, it is necessary to replace the water 6 about once a year. On the other hand, by providing the water quality maintaining device having a simple configuration according to the present embodiment. The replacement frequency of the water 6 can be extended to several years or more.

(Second Embodiment) FIG. 2 is a schematic diagram showing an example of the configuration of an ice heat storage device according to the present embodiment.
The same parts as those described above are denoted by the same reference numerals and the description thereof will be omitted, and here, only different parts will be described.

In FIG. 2, inside the purification device 13
As a purification element, an ion exchange resin 30 is filled instead of the activated carbon 17 described above. Each of the pipes 12 and 21 connected to the purification device 13 has a pressure gauge 31 that measures the pressure of the water 6 at the upstream (upstream side) and downstream (downstream side) of the purification device 13, and both (upstream and downstream). ) Pressure difference (differential pressure)
Are respectively provided.

Further, the measurement values of the pressure gauge 31 and the differential pressure gauge 32 are transmitted to the control device 33 for monitoring, and an alarm is output when the differential pressure value exceeds a predetermined value.
Next, the operation of the ice heat storage device of the present embodiment configured as described above will be described.

Here, only the portions different from the operation of the ice heat storage device of the first embodiment will be described. In FIG. 2, water 6 inside the storage tank 1 is constantly taken out from the water intake 11 and guided to the purification device 13, and the water 6 is always purified by the purification device 13.

On the other hand, in the water 6 inside the storage tank 1, a molten component having a surface active action, zinc oxide, iron oxide, and other molten substances are constantly precipitated from the wall of the pipe 7 or the wall of the storage tank 1. And rainwater and groundwater.

For this reason, the water 6 always shows the water quality determined by the balance between the purifying action of the purifying device 13 and the many polluting actions. Under the condition that the water quality is worse than the expected value, the ice heat storage device Performance gradually deteriorates.

On the other hand, when the purifying action is sufficient,
Water quality is kept within acceptable values, and the performance of the ice thermal storage device can be maintained at the expected value. In particular, in the present embodiment, the purification device 13
By adopting a configuration in which the state of impurities deposited inside is measured as the water flow resistance of the purification device 13, it is possible to detect in advance the performance degradation of the ice heat storage device.

That is, the ion exchange resin 30 is used as a purification element of the purification device 13. This makes it possible to adsorb and remove the acidic and alkaline components contained in the water 6, so that the molten components that could not be sufficiently separated by the activated carbon, the filter, and the strainer can be removed.

The pressure of the water 6 before and after the purifier 13 is measured, and the differential pressure is monitored. If the differential pressure exceeds a predetermined value, an alarm is output. As a result, the performance and life of the purification device 13 can be grasped.
It is possible to substantially detect the cleaning time of the ion exchange resin and the exchange time of the ion exchange resin 30 as the content.

As described above, in this embodiment, the same operation and effect as those of the ice heat storage device of the first embodiment can be obtained, and the ion exchange element of the purification device 13 can be used. Since the resin 30 is used, the acidic and alkaline components contained in the water 6 can be adsorbed and removed, so that it is possible to remove the molten components that cannot be sufficiently separated by the activated carbon, the filter, and the strainer.

Further, the pressure of the water 6 before and after the purifying device 13 is measured, and the differential pressure is monitored. When the differential pressure exceeds a predetermined value, an alarm is output.
Since the performance and life of the purifying device 13 can be ascertained, it is possible to substantially detect the cleaning time of the cleaning device 13 and the replacement time of the ion exchange resin 30 as the content.

(Other Embodiments) (a) In each of the above embodiments, the case where the purifying device 13 is provided between the outlet 11 and the pump 23 has been described. However, the present invention is not limited to this. 13 may be provided after the pump 23.

(B) In each of the above embodiments, the purification device 1
3, a case is described in which two drain outlets 26 are provided to take out the water 6 containing a large amount of components other than the separated dirt and water. However, the present invention is not limited thereto. A plurality of three or more locations may be provided.

(C) In each of the above embodiments, the purifying device 1
The case where the activated carbon 17 or the ion exchange resin 30 is used as the purifying element of the third embodiment has been described. However, the present invention is not limited to this, and another substance may be used as the purifying element of the purifying device 13.

[0059]

As described above, according to the invention corresponding to claim 1, a part of the water stored in the storage tank is converted into ice by the ice making means, and the ice is stored in the storage tank. In the ice heat storage device, the removing means for taking out the water in the storage tank, the pumping means for pumping the water, the purifying means having the purifying element for purifying the water, and the water after the purifying treatment by the purifying means are again stored in the storage tank. Since the water quality maintenance device composed of the return means to return to the inside is provided as an independent water circulation system, it is possible to reliably prevent the temporal decline of the ice making capacity due to the deterioration of the water quality with a simple configuration. It is also possible to provide an extremely reliable ice heat storage device that can use the water in the storage tank as domestic water in the event of a disaster, reduce the cost of water treatment during drainage, and ensure environmental safety.

According to the second aspect of the present invention,
In the ice heat storage device of the invention corresponding to claim 1, the purifying means is provided between the extracting means and the pressure feeding means,
The purifying means is provided with at least two water outlets for taking out water containing a large amount of components other than dirt and water separated by the purifying means. In addition to purifying water, dirt and water containing a lot of components other than water can be taken out of the system, making it possible to wash water more effectively and maintain stable ice making performance for a long time. An ice heat storage device can be provided.

On the other hand, according to the invention corresponding to claim 3,
In the ice heat storage device according to the first or second aspect of the present invention, activated carbon is used as a purifying element of the purifying means, so that a surfactant or fine powder of zinc oxide contained in water is adsorbed and removed. An ice heat storage device capable of removing a molten component that cannot be sufficiently separated by a filter or a strainer can be provided.

According to a fourth aspect of the present invention,
In the ice heat storage device according to the first or second aspect of the invention, since the ion exchange resin is used as the purification element of the purification means, it is possible to adsorb and remove acidic and alkaline components contained in water. An ice heat storage device capable of removing a molten component that cannot be sufficiently separated by activated carbon, a filter, and a strainer can be provided.

On the other hand, according to the invention corresponding to claim 5,
In the ice heat storage device according to any one of claims 1 to 4, the pressure of water upstream and downstream of the purifying means is measured, the pressure difference between the two is monitored, and the pressure difference is monitored. Since a control means for outputting an alarm when the pressure value exceeds a predetermined value is added, the performance and life of the purifying means can be grasped, and the cleaning time of the cleaning means and the replacement time of the contents can be determined. An ice heat storage device that can be substantially detected can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a first embodiment of an ice heat storage device according to the present invention.

FIG. 2 is a schematic view showing a second embodiment of the ice heat storage device according to the present invention.

FIG. 3 is a schematic diagram showing a configuration example of a conventional harvest type ice heat storage device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Storage tank, 2 ... Ice making device of a harvest type ice heat storage device, 3 ... Low temperature heat transfer surface, 4 ... Refrigerator, 5 ... Water circulation pump, 6 ... Water, 7 ... Water piping, 8 ... Water sprinkling device, 9 ... Plate Ice, 10: ice crusher, 11: water intake, 12: water pipe, 13: purifier, 14: valve, 15: strainer, 16: filter, 17: activated carbon, 18: activated carbon filling unit, 19 ... Room inside the purifier (upstream side), 20 ... Room inside the purifier (downstream side), 21 ... piping, 22 ... valve, 23 ... pump, 24 ... upper flange of the purifier, 25 ... lower part of the purifier Flange, 26 ... Drain outlet, 27 ... Piping, 30 ... Ion exchange resin, 31 ... Pressure gauge, 32 ... Differential pressure gauge, 33 ... Control device.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hajime Shingu 1-1-1, Shibaura, Minato-ku, Tokyo Inside Toshiba head office

Claims (5)

[Claims] 1. An ice heat storage device in which a part of water stored in a storage tank is made into ice by ice making means, and the ice is stored in the storage tank. Water quality comprising: a pumping unit for pumping the water; a purifying unit having a purifying element for purifying the water; and a returning unit for returning the water after the purifying process by the purifying unit to the inside of the storage tank again. An ice heat storage device comprising a maintenance device as an independent water circulation system. 2. The ice heat storage device according to claim 1, wherein the purifying means is provided between the take-out means and the pumping means, and the dirt and water separated by the purifying means are provided to the purifying means. An ice heat storage device characterized in that at least two water outlets are provided for extracting water containing a large amount of components other than water. 3. The ice heat storage device according to claim 1, wherein activated carbon is used as a purification element of said purification means. 4. The ice heat storage device according to claim 1, wherein an ion exchange resin is used as a purifying element of the purifying unit. 5. The method according to claim 1, wherein
In the ice heat storage device according to the item, measuring the pressure of water upstream and downstream of the purification means, monitoring the pressure difference between the two, and outputting an alarm when the pressure difference value exceeds a predetermined value An ice heat storage device characterized by adding control means for performing the operation.