JPH10325657A - Ice thermal storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a facility and permit continuous operation by a method wherein a nozzle, injecting cooling medium into water in an ice making device vessel, and a perforated plate, on which suction holes for supplying the cooling medium, injected by the nozzle provided in the cooling medium, to a cooling means, are provided. SOLUTION: Anti-freeze is injected through an anti-freeze nozzle 5 and the anti-freeze is taken out through an outlet port nozzle 8. In a reserving unit 4, a perforated plate 12 is installed in parallel to a baffle plate 7 and a plurality of suction holes 11, for passing anti-freeze which has flown into the reserving unit 4, are formed. The antifreeze, passing through the suction holes 11 of the perforated plate 12, is taken out through the outlet port nozzle 8 and is cooled by a refrigerating machine, further, is injected into an ice making device vessel again from the anti-freeze nozzle 5 whereby a part of the anti-freeze, which carries bubbles and whose flow speed is high, is eliminated. According to this method, freezing, clogging and the like of downstream instruments due to the mixing of water or ice into the anti-freeze can be prevented and the miniaturization of a facility can be contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice heat storage device for use in equipment for supplying cold heat for industrial use and for air conditioning equipment for high-rise buildings for air conditioning.

[0002]

2. Description of the Related Art In recent years, it has become possible to use inexpensive late-night power and further reduce the power demand for cooling, which is concentrated during the day.
In addition, since the capacity of the heat source equipment and the contract power can be reduced, the air conditioning system having ice heat storage is expected to be applied to a relatively large-capacity air conditioning system such as a building air conditioner or a district cooling / heating system.

[0003] In particular, recently, the cooling load in the daytime in summer has rapidly increased, and there is a possibility that the stable supply of electric power may be hindered.

[0004] Against this background, a number of air conditioners having a heat storage layer have been proposed, some of which have already been operated, and especially an ice heat storage device capable of greatly increasing the heat storage capacity as compared with conventional water heat storage. Practical application is underway.

In this ice heat storage device, sherbet-like ice particles having fluidity are stored in a heat storage tank, and this is used as a cold heat source for daytime cooling in an air conditioner or the like, or generated in an ice making section. The ice grain heavy water is directly supplied to an air conditioner or the like to serve as a cooling heat source for cooling.

An example of the ice heat storage device is disclosed in US Pat. No. 2,996,894, Japanese Patent Application Laid-Open No. 5-223291, and the like. These are all latent heat storage devices for air conditioning, using water as a latent heat storage element (first liquid), and a cooling medium (second liquid: water-insoluble) cooled to 0 ° C. or less in a refrigerator. Antifreeze, hereinafter called antifreeze)
Is ejected into water to directly contact and exchange with water to continuously generate ice particles.

[0007] Such a latent heat storage device of the direct contact type has a small heat loss because there is no heat exchange device between the first liquid and the second liquid, and produces fine ice particles with high efficiency. Can be.

Further, since the ice particles move together with the buoyancy and the water flow, the ice is always produced by the contact between the water at 0 ° C. and the antifreeze, so that a high ice making efficiency can be obtained. FIG. 5 is a partial cross-sectional view showing an ice making device container of the conventional ice heat storage device.

As shown in FIG. 1, the inside of an ice making device container of the ice heat storage device 1 has an ice making part 2 for producing ice and an ice making part 2.
And a storage unit 4 for storing the antifreeze liquid.

The ice making section 2 and the ice storage section 3 are separated by a partition wall 6. Further, in the figure, reference numeral 5 denotes an antifreeze nozzle for injecting antifreeze, and reference numeral 7 denotes a baffle plate for changing the direction of the flow of antifreeze ejected from the antifreeze nozzle 5.

Reference numeral 8 denotes an outlet nozzle for taking out the antifreeze to the outside, 9 denotes ice particles, 10 denotes an interface between water and the antifreeze, and 13 denotes bubbles mainly composed of the antifreeze. .

The antifreeze flowing out of the antifreeze nozzle 5 exchanges heat with the surrounding water in the ice making unit 2 to generate ice particles, and then flows in the direction of the baffle plate 7 as shown by the arrow in the figure. And flows to the ice storage unit 3.

During this time, water, ice and antifreeze are separated by their density difference, and the antifreeze flows into the storage section 4 and water and ice flow into the ice storage section 3. The antifreeze in the storage section 4 is taken out from the outlet nozzle 8, cooled by a refrigerator (not shown), and flows into the apparatus again from the antifreeze nozzle 5. on the other hand,
The generated ice is accumulated in the ice storage unit 3 and supplies cold heat to the outside from a cold water extracting system (not shown).

As described above, in the conventional ice heat storage device, the antifreeze storage portion is provided at the lower portion of the ice making portion so that the antifreeze separated from the water stays with a certain depth, and the storage portion is provided with the antifreeze solution. 4 was provided with an outlet nozzle to take out the antifreeze.

[0015]

In the ice making device container of the ice heat storage device as shown in FIG. 5, the antifreeze flowing out of the outlet nozzle 5 and exchanging heat with water has a certain flow rate and has a certain flow rate. Collides with the interface 10 between the antifreeze and water.

At this time, a bubble 13 containing an antifreeze in a thin film of water is generated at the interface 10. Since the bulk of the foam 13 is composed of the antifreeze, the specific gravity is close to that of the antifreeze, and the foam flows out along with the flow of the antifreeze.

As shown in FIG. 5, in general, the flow passage area of the storage section 4 and the cross-sectional area of the outlet pipe are largely different, and the shapes thereof are different. When the portion where the flow is fast is close to the interface 10 between the antifreeze and the water or the mixing region where the separation has not sufficiently proceeded (portion A in the figure), the water easily flows out of the outlet nozzle 8 together with the antifreeze. .

If water flows out while being mixed with the antifreeze, it causes adhesion of ice particles to valves and filters of the downstream piping and freezing in the refrigerator. As a result, stable continuous operation of the equipment over a long period of time can be achieved. There was a problem that it became difficult. In addition, since the structure of the equipment tends to be large due to such a problem, there is a problem that the construction cost increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an ice heat storage device capable of reducing the size of equipment and operating the equipment continuously for a long time. And

[0020]

Therefore, first, in order to achieve the above object, a first invention is to provide a cooling means for cooling a cooling medium insoluble in water and having a specific gravity larger than water, A nozzle for injecting the cooled cooling medium into the water in the ice making device container, and a suction provided in the cooling medium in the ice making device container for supplying the cooling medium injected by the nozzle to the cooling means. An ice heat storage device comprising: a perforated plate having holes formed therein.

According to a second aspect of the present invention, there is provided a cooling means for cooling a cooling medium which is insoluble in water and has a specific gravity larger than that of water, and injects the cooling medium cooled by the cooling means into water in an ice making device container. A nozzle provided in the cooling medium in the ice making device container and having a perforated plate formed with a suction hole for supplying the cooling medium injected by the nozzle to the cooling means; Is formed so that the flow rate of the cooling medium passing through the perforated plate is constant.

Further, according to a third aspect of the present invention, there is provided a cooling means for cooling a cooling medium which is insoluble in water and has a specific gravity larger than that of water, and injects the cooling medium cooled by the cooling means into water in an ice making device container. A nozzle and a manifold provided in the cooling medium in the ice making device container and connected to communicate with an outlet nozzle for supplying the cooling medium injected by the nozzle to the cooling means, An ice heat storage device, wherein the manifold has a suction hole formed on a side surface or a downstream side in a flow direction of the cooling medium.

In a fourth aspect based on the third aspect, a suction hole is further formed on a side of the manifold upstream of the flow direction of the cooling medium, and a baffle plate is further provided in the suction hole. An ice heat storage device characterized in that:

Next, the operation of each invention will be described. According to the first invention, by installing the perforated plate provided with the suction holes in the cooling medium in the ice making device container, freezing and clogging of the downstream equipment due to water or ice being mixed into the antifreeze solution. Can be prevented.

According to the second aspect of the present invention, by using the perforated plate having the suction holes formed therein, a uniform flow velocity distribution is obtained on the secondary side of the perforated plate, thereby preventing water from being mixed into the antifreeze due to the drift. As a result, the equipment can be operated continuously for a long time.

According to the third aspect of the present invention, the suction holes are formed in the manifold on the side or downstream with respect to the flow direction of the cooling medium. Therefore, the suction holes are hardly affected by the upstream side, and the suction of bubbles can be prevented. As a result, the equipment can be operated for a long time.

According to the fourth aspect, the suction hole is formed not only on the side surface or the lower portion of the manifold but also on the side surface on the upstream side with respect to the flow of the cooling medium. Can be operated for a long time.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 is a partial sectional view showing an ice making device container of an ice heat storage device according to a first embodiment of the present invention. Note that the same parts as those in FIG.

That is, the difference between the conventional ice heat storage device and the ice heat storage device of the present embodiment is that the perforated plate 12 is provided inside. As shown in FIG. 1, the inside of an ice making device container of the ice heat storage device 1 according to the present embodiment includes an ice making unit 2 for generating ice, an ice storage unit 3 for storing ice generated in the ice making unit 2, and an antifreeze. And a storage unit 4 for storing the water.

The ice making section 2 and the ice storage section 3 are separated by a partition wall 6. Further, in the figure, reference numeral 5 denotes an antifreeze nozzle for injecting antifreeze, and reference numeral 7 denotes a baffle plate for changing the direction of the flow of antifreeze ejected from the antifreeze nozzle 5.

Reference numeral 8 denotes an outlet nozzle for taking out the antifreeze to the outside, 9 denotes ice particles, 10 denotes an interface between water and the antifreeze, and 13 denotes bubbles mainly composed of the antifreeze. .

Further, a perforated plate 12 is provided substantially parallel to the baffle plate 7 in the storage section 4 in the ice making device container. As shown in FIG. 1, the perforated plate 12 has a plurality of suction holes 1 for allowing the antifreeze liquid flowing into the storage section 4 to pass therethrough.
1 is formed. The perforated plate 12 is placed in an antifreeze as shown in FIG.

Next, the operation until the antifreeze liquid injected from the antifreeze liquid nozzle 5 reaches the outlet nozzle 5 will be described. The antifreeze flowing out of the antifreeze nozzle 5 exchanges heat with surrounding water in the ice making unit 2 to generate ice particles, and then flows into the ice storage unit 3 by changing the direction of the flow by the baffle plate 7.

During this time, the water, ice and antifreeze are separated by their density difference, the antifreeze flows into the storage part 4 and the water and ice flow into the ice storage part 3. The generated ice is accumulated in the ice storage unit 3 and supplies cold heat to the outside from a cold water extracting system (not shown).

On the other hand, the antifreeze that has flowed into the antifreeze storage part 4 flows into the storage part 4 at a certain flow rate, but the flow rate of the antifreeze before and after the perforated plate 12 rises in the antifreeze due to the buoyancy of water droplets and bubbles themselves. Lower than speed and uniform.

The antifreeze that has passed through the suction hole 11 of the perforated plate 12 is taken out of the outlet nozzle 8 and cooled by a refrigerator (not shown).
From the ice making device.

Therefore, according to the ice heat storage device of the present embodiment, by installing the perforated plate 12 provided with the suction holes 11 in the container of the ice making device, the portion where the flow rate of the antifreeze for transporting the bubbles is fast is eliminated. As a result, it is possible to control the suction of bubbles by the local high-speed flow of the antifreeze.

That is, the flow rate of the antifreeze before and after the perforated plate 12 can be made lower and more uniform than the speed at which water droplets and bubbles rise in the antifreeze due to its own buoyancy. Can prevent freezing and clogging of downstream equipment due to contamination. <Second Embodiment> Next, an ice heat storage device according to a second embodiment of the present invention will be described.

In the ice heat storage device according to the first embodiment, the freezing and clogging of the downstream equipment can be prevented by mixing water and ice into the antifreeze, but it is necessary to completely prevent it. Could not.

The ice heat storage device of the present embodiment can completely prevent water and ice from entering the antifreeze. That is, in the ice heat storage device of the present embodiment, the perforated plate 1 installed in the above-described first embodiment is used.
By changing the size of the suction hole 11 formed in 2 depending on the place, the above object is ensured.

The size of the suction hole 11 cannot be determined unconditionally depending on the overall shape, the inflow form of the antifreeze, the position and size of the outlet nozzle, etc. In principle, the hole diameter is small where the velocity component is large, and the hole diameter is large where the velocity component parallel to the perforated plate is large.

As described above, by using the perforated plate 12 having the suction holes 11 formed therein, a uniform flow velocity distribution is obtained on the secondary side of the perforated plate 12, thereby preventing the water from being mixed into the antifreeze due to the drift. As a result, the equipment can be operated continuously for a long time. <Third Embodiment> Next, an ice heat storage device according to a third embodiment of the present invention will be described.

The ice heat storage device of the present embodiment has the above-described first heat storage device.
In this embodiment, a suction manifold 21 is provided instead of the perforated plate 12 described in the first and second embodiments.

FIG. 2 is a partial sectional view showing an ice making device container of the ice heat storage device according to the third embodiment of the present invention, and FIG. 3 is a view taken along the line AA of FIG. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, in the ice heat storage device of the present embodiment, a manifold 21 is connected in the ice making device container so as to communicate with the outlet nozzle 8. As shown in FIG. 3, the manifold 21 is branched into five branches, and the branched pipes are formed with suction holes 22 for sucking antifreeze. In addition, this manifold 21 is also arranged in the antifreeze like the above-described perforated plate 12.

The suction holes 22 are formed on side surfaces of the manifold 21. Then, the antifreeze liquid sucked into the suction holes 22 is supplied to the refrigerator through the outlet nozzle 8 as described above.

That is, the suction hole 22 formed on the side surface of the manifold 21 is hardly affected by the upstream side, and the suction of bubbles can be prevented. Therefore, according to the ice heat storage device of the present embodiment, the equipment can be operated continuously for a long time.

In the above description, the suction hole 22 is formed on the side surface of the manifold 21. However, the suction hole may be formed on the downstream side of the antifreeze, that is, on the lower portion of the manifold 21. <Fourth Embodiment> Next, an ice heat storage device according to a fourth embodiment of the present invention will be described.

The suction manifold having the suction hole formed on the side surface or the lower portion described in the third embodiment may not be implemented due to restrictions on the dimensions of the equipment. The ice heat storage device of the present embodiment is effective in such a case, and a suction hole is further formed in the upper part of the suction manifold of the third embodiment described above. To which a second baffle plate is attached.

FIG. 4 is a partial sectional view showing a manifold of an ice heat storage device according to a fourth embodiment of the present invention. As shown in the figure, a suction hole 22 is formed on the upstream side surface of the suction manifold 21 of the present embodiment.
A second baffle plate 31 is attached to the vicinity of the suction hole 22 via a support plate 32.

In the ice heat storage device having such a configuration,
The second baffle plate 31 provided in the vicinity of the suction hole 22 prevents direct suction from the main flow, prevents the flow from being disturbed, gives a sharp bend to the flow, and makes it easier for bubbles to disappear.

Therefore, according to the ice heat storage device of this embodiment, the equipment can be operated continuously for a long time. In the above-described embodiment, the case where the second baffle plate 31 is attached in the ice making device container has been described. However, the second baffle plate 31 may not be provided.

Therefore, according to the ice heat storage devices of the first to fourth embodiments, an ice heat storage device that continuously generates fine and granular ice by directly contacting antifreeze and water. In the above, it is possible to improve the efficiency of separating the antifreeze and water, and to remove factors that hinder continuous operation due to the mixing.

[0054]

As described above in detail, according to the present invention,
The size of the equipment can be reduced, and the equipment can be operated continuously for a long time.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing an ice making device container of an ice heat storage device according to a first embodiment of the present invention.

FIG. 2 is a partial sectional view showing an ice making device container of an ice heat storage device according to a third embodiment of the present invention.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a cross-sectional view showing a manifold of an ice heat storage device according to a fourth embodiment of the present invention.

FIG. 5 is a partial sectional view showing an ice making device container of the conventional ice heat storage device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ice heat storage apparatus, 2 ... Ice making part, 3 ... Ice storage part, 4 ... Storage part, 5 ... Antifreeze liquid nozzle, 6 ... Partition wall, 7 ... Baffle plate, 8 ... Exit nozzle, 9 ... Ice particle, 10 ... Water and antifreeze liquid 11 ... suction holes, 12 ... perforated plate, 13 ... foam, 21 ... suction manifold, 22 ... suction holes, 31 ... second baffle plate, 32 ... support plate.

Claims (4)

[Claims] A cooling means for cooling a cooling medium insoluble in water and having a specific gravity greater than that of water; a nozzle for injecting the cooling medium cooled by the cooling means into water in an ice-making apparatus container; An ice heat storage device, comprising: a perforated plate provided in the cooling medium in a container and formed with a suction hole for supplying the cooling medium injected by the nozzle to the cooling means. 2. A cooling means for cooling a cooling medium insoluble in water and having a specific gravity greater than water, a nozzle for injecting the cooling medium cooled by the cooling means into water in an ice making device container, and the ice making device. A perforated plate provided in the cooling medium in a container, and formed with a suction hole for supplying the cooling medium injected by the nozzle to the cooling means, wherein the diameter of the suction hole is An ice heat storage device characterized in that the flow rate of a cooling medium passing through a plate is formed to be constant. 3. A cooling means for cooling a cooling medium insoluble in water and having a specific gravity larger than water, a nozzle for injecting the cooling medium cooled by the cooling means into water in an ice making device container, and the ice making device. A manifold provided in the cooling medium in a vessel, the manifold being connected to communicate with an outlet nozzle for supplying the cooling medium injected by the nozzle to the cooling means; An ice heat storage device, wherein a suction hole is formed on a side surface with respect to a flow direction of a cooling medium or a side surface on a downstream side. 4. The ice according to claim 3, wherein a suction hole is further formed on a side of the manifold upstream of the flow direction of the cooling medium, and a baffle plate is further provided in the suction hole. Heat storage device.