JPH0760040B2 - Ice heat storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention cools an aqueous solution for ice making into a supercooled state,
The present invention relates to an ice heat storage device that eliminates the supercooled state to be iced and stores the generated ice in a heat storage tank.

(Prior Art) In recent years, a heat storage air-conditioning system is used for a relatively large-scale air conditioning system in an industrial plant, a building, etc. to reduce the power demand at the peak of the cooling load and expand the power demand at the off-peak time. I have to.

The heat storage method of this heat storage air conditioning system includes a water heat storage method using sensible heat and an ice heat storage method using latent heat.
In the former water heat storage method, there is a drawback that effective effects cannot be exhibited unless the heat storage tank is enlarged.
In addition, the demand for the ice heat storage system is increasing due to its safety and economical efficiency.

A conventional air conditioning system that uses this ice heat storage method is called a static method, and a cooling pipe for evaporating the refrigerant in the refrigeration circuit is introduced and distributed in the storage tank that stores water. The water is cooled by evaporating the refrigerant in the cooling pipe to generate ice on the surface of the cooling pipe, and the ice is stored as a heat storage medium in the storage tank.

However, this method has a drawback that the ice attached to the cooling pipe becomes a thermal resistance, the heat transfer performance is lowered as the thickness of the ice becomes thicker, and the COP of the system is lowered. In addition, since the ice generated on the cooling pipe is an ice block, it is difficult to quickly and uniformly melt the ice when it radiates heat, and there is also a problem that heat radiation that follows load changes cannot be obtained. It was something that Therefore, in order to solve these problems, some ice making methods (generally called dynamic methods) in which ice generated on a cooling surface is not attached to the cooling surface have been considered. Further, among the ice generated by this method, what is particularly attracting attention is slurry ice, and since this slurry ice has good fluidity, it can be easily transported by a transport means such as a pump, Since it has a large surface area, it has a high melting rate during heat dissipation and has excellent properties such as being able to follow changes in the cooling load, and is particularly effective in ice heat storage.

As an example of a method for producing such slurry-like ice, there is one as shown in US Pat. No. 4,286,436. What is shown in this, by using an upright shell-and-tube type ice-making container, the surface of the cooling pipe, that is, by flowing down an aqueous liquid such as ethylene glycol solution along a vertical cooling surface, By freezing at least a part of the liquid, ice in the form of slurry was produced.

Further, as another example, there is one disclosed in Japanese Patent Laid-Open No. 62-147271. What is shown in this is that supercooled water is generated by cooling water while maintaining the flow state where the flow velocity is above a predetermined value on the cooling surface, and the supercooled water is transferred to the heat storage tank to It is intended to be cooled to ice and to be supercooled by the impact.

(Problems to be Solved by the Invention) However, in the system described above, it is possible to generate ice in a slurry state, but each has the following problems. Is.

First, in the former method (US Pat. No. 4,286,436), it is necessary to keep the surface roughness as small as possible on the cooling surface of the heat exchanger of the ice making container, which is arranged vertically, in order to prevent the adhesion of ice. However, electrolytic polishing or the like is required for the actual surface treatment, and its manufacturing work is complicated. Further, even when the surface treatment is performed, if the cooling surface is scratched or stagnation occurs in the flowing liquid film, the freezing on the cooling surface spreads from them and the ice making cannot be continued. there were. Furthermore, since an aqueous solution obtained by mixing an antifreeze liquid and water is used as a liquid for ice making, the concentration of water in the aqueous solution decreases as the ice making progresses, so that the concentration becomes higher and the freezing temperature becomes higher. The ice making efficiency decreases as the temperature decreases.

On the other hand, in the latter method (JP-A-62-147271), in the case described below, supercooling is eliminated on the cooling surface, and ice is generated on the cooling surface. After that, it becomes impossible to generate supercooled water. That is, (I) When the flow velocity near the cooling surface is reduced or the water supply is stopped due to a failure of the drive system during the operation of the refrigeration cycle (II) Ice in the water sent to the cooling unit (III) When a shock is applied to the cooling surface due to the vibration of the device, etc.

Therefore, the present invention has an object to obtain an ice heat storage device capable of quickly and surely cooling an aqueous solution for ice making to a supercooled state and reliably canceling the supercooled water state of the aqueous solution at a predetermined position. .

(Means for Solving the Problems) In order to solve the above-mentioned object, the present invention takes the following means.

As shown in FIG. 1, the ice heat storage device according to the invention of claim (1) makes the aqueous solution (W) for ice making into minute droplets and goes from the upper part to the lower part in the ice making container (3). Water supply means (4) having a spray nozzle (4c) ejecting downward,
Cooling air (E) is fed upward from the lower part to the upper part in the ice making container (3), and the droplet-like aqueous solution (W) jetted into the ice making container (3) by the water supply means (4) is supplied. An air supply means (5) for cooling to a supercooled state that maintains a liquid state below the freezing temperature, and a drop-shaped aqueous solution (W) provided in the lower part in the ice making container (3) and in the supercooled state.
Generated in the ice-making container (3) and the ice-making means (6) for colliding with each other to eliminate the supercooled state, and to make the droplet-shaped aqueous solution (W) to be frozen and stored at the bottom of the ice-making container (3). And an ice feeding means (7) for feeding the formed ice (I) into the heat storage tank (2). Further, the ice-making means (6) has a plurality of ice-making tubes (6a), (6a), etc. for colliding the droplet-like aqueous solution (W) in a supercooled state to ice the droplet-like aqueous solution (W). Done,
A liquid having a temperature equal to or higher than the freezing temperature of the aqueous solution (W) is melted so that a part of the ice (I) generated on the surface of the ice making tube (6a) is melted and the ice (I) is separated from the ice making tube (6a). It is designed to be freely distributed.

As shown in FIG. 2, the ice heat storage device according to the invention of claim (2) makes the aqueous solution (W) for ice making into minute droplets and from one side to the other side in the ice making container (3). Water supply means (4) having a spray nozzle (4c) ejecting horizontally toward the cooling section and cooling air (E) from one side to the other side in the ice making container (3) in the horizontal direction. And an air supply means for cooling the droplet-shaped aqueous solution (W) jetted into the ice making container (3) by the water supply means (4) to a supercooled state in which the liquid phase state is maintained below the freezing temperature ( 5) and the drop-shaped aqueous solution (W) provided on the other side in the ice making container (3) and in the supercooled state collide with each other to eliminate the supercooled state, and the drop-shaped aqueous solution (W). Ice making means (6) for making iced and storing it at the bottom of the ice making container (3), and ice (I) produced in the ice making container (3) Causing a delivering to the heat storage tank (2) in an ice delivery means (7). Also, ice making means (6)
A plurality of ice-making tubes (6a), (6a) that collide with the aqueous solution (W) in a supercooled state to ice the aqueous solution (W)
And an aqueous solution (W) so that a part of the ice (I) generated on the surface of the ice making pipe (6a) is melted and the ice (I) is separated from the ice making pipe (6a). ) The freezing temperature of the liquid above is configured to be freely flowable.

The invention according to claim (3) is such that in the ice heat storage device according to claim (1) or (2), the cross section of the ice making pipe (6a) is formed into a perfect circle or an elliptical shape elongated in the vertical direction. .

The invention according to claim (4) is based on the above claims (1) and (2).
Alternatively, in the ice heat storage device according to (3), the ice making pipe (6a)
In the configuration, a portion having a high arrangement density and a portion having a low arrangement density are provided.

As shown in FIG. 5, the ice heat storage device according to the invention of claim (5) makes the aqueous solution (W) for ice making into minute droplets from one side to the other side in the ice making container (3). Water supply means (4) having an ejector (4d) horizontally ejected toward the ice portion and cooling air (E) is fed into the ice making container (3), and the water supply means (4) is used. In the ice making container (3), an air supply means (5) for cooling the droplet-like aqueous solution (W) jetted into the ice making container (3) to a supercooled state in which the liquid phase state is maintained below its freezing temperature. The droplet-shaped aqueous solution (W) provided on the other side collides with the droplet-shaped aqueous solution (W) in the supercooled state to cancel the supercooled state, and the droplet-shaped aqueous solution (W)
Is iced and the water supply means (4) is branched and connected to supply a part of the aqueous solution (W) of the water supply means (4) to produce an aqueous solution (W) having a freezing temperature or higher ( Vertically extending ice-making surface (6e) that flows down to the bottom of 3)
An ice making means (6) equipped with an ice making plate (6c), and an ice feeding means (7) for feeding the ice (I) produced in the ice making container (3) into the heat storage tank (2) It is configured to include.

(Operation) The operation of the configuration of the invention according to each of the above claims is as described below.

In the invention according to claim (1), first, the aqueous solution (W) is made into fine droplets from the spray nozzle (4c) of the water supply means (4) from the upper part to the lower part in the ice making container (3). At the same time, the cooling air (E) is jetted downward into the ice making container (3) from the lower part to the upper part by the air supply means (5), thereby freezing the above-mentioned drop-shaped aqueous solution (W). Cool to a supercooled state that maintains the liquid phase below the temperature. Then, the supercooled dripping aqueous solution (W) collides with a plurality of ice making pipes (6a), (6a) ... As an ice making means (6) provided in the lower portion of the ice making container (3). The supercooled state disappears and it freezes. Then, as the temperature of the surface of the ice making pipe (6a) rises due to the flow of a liquid having a temperature equal to or higher than the freezing temperature of the aqueous solution (W) inside the ice making pipe (6a), a part of the ice (I) is melted and the ice making pipe (6a) Was separated from
Furthermore, after that, it is fed from the ice making container (3) into the heat storage tank (2) by the ice feeding means (7) and stored as a heat storage medium in the heat storage tank (2). In this way, the aqueous solution (W) is made into minute droplets and is cooled, so that the aqueous solution (W) can be rapidly and surely cooled to a supercooled state, and the aqueous solution (W) can be cooled. Since it is made to collide with (6a) to eliminate the supercooled state, the supercooled state can be reliably eliminated at a predetermined position, and ice (I) for heat storage can be continuously generated. In addition, the generated ice (I)
Since it is in the form of a slurry, it is easy to convey, and the surface area is large, so that the melting speed is fast and it is possible to follow the fluctuation of the cooling load. Further, since the droplet aqueous solution (W) and the cooling air (E) flow in opposite directions, the droplet aqueous solution (W) is cooled while its descent is hindered by the cooling air (E). As a result, the cooling time can be secured for a long time, and the droplet-shaped aqueous solution (W) can be always exposed to the cooling air (E) having a low temperature equal to or lower than the freezing temperature, which also provides a quick and reliable supercooled state. be able to. Furthermore,
Ice (I) attached to the ice making tube (6a) of the ice making means (6)
The temperature of the surface of the ice making pipe (6a) rises due to the flow of a liquid having a temperature equal to or higher than the freezing temperature of the aqueous solution (W) inside the ice making pipe (6a), and a part of the ice (I) is melted to form the ice making pipe (6a). ) And fed to the heat storage tank (2). For this reason, the ice (I) is surely separated from the ice making tube (6a).

In the invention according to claim (2), the spray nozzle (4c)
The droplet-shaped aqueous solution (W) horizontally generated from one side portion to the other side portion in the ice making container (3) is supercooled by cooling air (E) flowing in the same direction, and then ice-making is performed. After colliding with the side surface of the means (7), the supercooling is eliminated and it is iced and adheres to the side surface. After that, the ice making tube (6a) is circulated by a liquid having a temperature equal to or higher than the freezing temperature of the aqueous solution (W). As the temperature of the surface of the pipe (6a) rises, a part of the ice (I) is melted and separated from the ice making pipe (6a), and the inside of the heat storage tank (2) is removed from the ice making container (3) by the ice feeding means (7). Is stored in the heat storage tank (2) as a heat storage medium. Therefore, the aqueous solution (W) can be rapidly and surely cooled to a supercooled state,
Moreover, this supercooled state can be reliably eliminated at a predetermined position, so that not only the ice (I) for heat storage can be continuously generated, but also the ice (I) generated and attached to the side surface of the ice making means (6) ( Since I) is easily affected by gravity, it can be easily removed. Further, since the droplet-shaped aqueous solution (W) and the cooling air (E) are caused to flow in the same horizontal direction, it is possible that the droplet-shaped aqueous solution (W) drops downward under the influence of gravity. ) Will be guided toward the ice making tube (6a). That is, the cooling air (E) can have both the function of cooling the droplet-shaped aqueous solution (W) to a supercooled state and the function of guiding the droplet-shaped aqueous solution (W) toward the ice making pipe (6a). it can.

In the invention according to claim (3), since the ice making pipe (6a) has a perfect circular cross section, the attached ice (I) can be smoothly released. Further, when the cross section has an elliptical shape that is long in the vertical direction, a more reliable separating action can be obtained.

In the invention according to claim (4), the flow direction of the cooling air (E) is changed in the densely arranged portion of the ice making pipe (6a) and flows to the sparse portion. ) Together with the supercooled aqueous solution (W) cannot follow the change in the flow direction of the cooling air (E), and most of them collide with the ice making pipe (6a), and the recovery thereof is performed. As the rate increases, so does the efficiency of ice making.

In the invention according to claim (5), the supercooled aqueous solution (W) collides with the ice making surface (6e) to be iced, and at the same time,
The aqueous solution (W) flowing down the ice making surface (6e) allows the water to be smoothly stored at the bottom of the ice making container (3). As a result, the aqueous solution (W) can be quickly and surely cooled to a supercooled state, and this supercooled state can be reliably eliminated at a predetermined position, so that the ice (I) for heat storage can be continuously generated. Instead, it is possible to simultaneously make ice by removing supercooling and detach from the ice making surface (6e). Further, in this operation, the ice generated by the drop-shaped aqueous solution (W) having a freezing temperature or lower is brought into contact with the flowing aqueous solution (W) having the freezing temperature or higher to suppress the freezing of the flowing aqueous solution (W). However, only the droplet-shaped aqueous solution (W) can be iced, and this also makes it possible to continuously perform a reliable ice making operation.

(First Embodiment) Next, a first embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 1, the present ice heat storage device (1) includes a heat storage tank (2), an ice making container (3), a water supply means (4), an air supply means (5), an ice making means (6) and an ice feeding means. The supply means (7) is a main part.

Hereinafter, each part will be described.

The heat storage tank (2) is a box body having an open upper part, and is a so-called heat storage portion to which the ice (I) produced in the ice making container (3) is supplied and stored, and inside the heat storage tank (2) for ice making. The aqueous solution (W) is stored. At the lower part of the side wall (2a), the upstream end (4) of the water supply pipe (4a) of the water supply means (4) is provided.
b) is connected, while the connecting pipe (7a) of the ice feeding means (7) is introduced from above the heat storage tank (2), and its downstream end (7c) is inside the heat storage tank (2). It is opened in the aqueous solution (W).

The ice making container (3) is a cylindrical container having an upper surface (3
The upstream end (5f) of the recovery duct (5e) of the air supply means (5) is connected to a), while the lower part of the side surface (3b) is connected to the supply duct (5b) of the air supply means (5). Downstream end (5d)
Are connected. Further, in the upper part of the ice making container (3), an air supply means (5) for generating blown air toward the recovery duct (5e) for circulating the cooling air (E) supplied from the air supply means (5). ) Is provided, and a spray nozzle (4c) that is the downstream end of the water supply pipe (4a) of the water supply means (4) is provided below the fan (F) close to the fan (F). Has been done. The upstream end (7b) of the connecting pipe (7a) of the ice feeding means (7) is connected to the lower portion of the ice making container (3).

The water supply means (4) comprises a water supply pipe (4a), a brine pump (P1) and a spray nozzle (4c),
Driven by the brine pump (P1), the aqueous solution (W) in the heat storage tank (2) is jetted and supplied into the ice making container (3) in the form of drops from the spray nozzle (4c) through the water supply pipe (4a). Is. In addition, this spray nozzle (4c) is
The downstream end of a) is branched into a plurality of parts, each of which is equipped with a jet nozzle.

The air supply means (5) comprises an air cooler (5a), a supply duct (5b) and a recovery duct (5e),
The evaporator of the refrigeration circuit (not shown) is connected to the air cooler (5a), and the cooling air (E) generated in the air cooler (5a) is supplied to the ice making container (3) through the supply duct (5b). ) Is supplied from the lower part of the side wall (3b) and is returned from the upper part of the ice making container (3) to the air cooler (5a) by the recovery duct (5e) and circulated.

The ice making means (6) is below the spray nozzle (4c) of the water supply means (4) and at the downstream end (5) of the supply duct (5b).
a plurality of ice making pipes (6a) arranged above the d) are arranged in a staggered manner in the ice making container, and a valve (V) is provided in the ice making pipe (6a), The above ice making tube (6a)
It is configured so that hot water or tap water can freely flow therein, and is configured to collide with a supercooled drop-shaped aqueous solution to be iced.

The ice feeding means (7) comprises a communication pipe (7a) and a slurry pump (P2), and the ice (I) generated in the ice making container (3) by driving the slurry pump (P2) is connected to the communication pipe (7).
It is sent to the heat storage tank (2) via a).

Next, the aqueous solution (W) stored in the heat storage tank (2) will be described. The aqueous solution (W) is a mixed liquid of an antifreezing liquid such as ethylene glycol and water or a liquid consisting of only water, and has a specific gravity of about 1 and is non-volatile. Therefore, during the ice making operation, the inside of the heat storage tank is composed of an ice layer and an aqueous solution layer from above.

Next, the operation of the present apparatus having the above configuration will be described.

The operation of this device consists of a spraying operation, an ice making operation and a heat storage operation.

First, in the spraying operation, the brine pump (P1) is driven to drop the aqueous solution (W) in the heat storage tank (2) from the spray nozzle (4c) into the ice making container (3) through the water supply pipe (4a). And eject downward. In the ice making operation performed together with the spraying operation, the cooling air (E) generated by the operation of the air cooler (5a) is supplied into the ice making container (3) through the supply duct (5b). On the other hand, an upward airflow is generated by the rotation of the fan (F) provided in the upper portion of the ice making container (3) (arrow A), and the cooling air (E) rises in the ice making container (3) by the upward airflow. Then, heat exchange is performed between the droplet-shaped aqueous solution (W) supplied from the spray nozzle (4c), the droplet-shaped aqueous solution (W) is cooled to a supercooled state, and then air is collected from the recovery duct (5e). It is returned to the cooler side and circulated. Then, the aqueous solution (W) cooled to the supercooled state descends in the ice making container (3) and collides with the ice making pipe (6a). Due to the collision, the aqueous solution (W) is freed from the supercooled state and becomes iced, and is attached to the ice making tube, and is successively attached to the ice making tube in a laminated state. At that time, the phase change latent heat is released to the air and the object, but since the water has a thin film shape, the heat transfer coefficient is large, and the process of eliminating supercooling proceeds promptly.

In the heat storage operation for storing the ice (I) generated as described above, the valve (V) is opened, and water (or tap water) having a temperature equal to or higher than the freezing temperature of the hot water or the aqueous solution is circulated in the ice making pipe (6a). To raise the temperature of the surface of the ice making tube (6a) to melt the vicinity of the adhering portion of the ice (I) adhering to the ice making tube (6a), and to remove it from the ice making tube (6a) by gravity to form a slurry of ice. (I) and temporarily stored in the bottom of the ice making container (3). At the time of this detachment, the ice adhering to the ice making pipe by the above ice making operation is adhering in a state where the aqueous solution (W) is mixed, so that the adhering force to the ice making surface is weak, and the ice making pipe slightly moves from the ice making pipe. Can be released. Then, by driving the slurry pump (P2), the slurry ice (I) stored at the bottom of the ice making container (3) is fed to the heat storage tank (2) via the connecting pipe (7a) to store heat. The operation ends.

When the ice (I) in the heat storage tank (2) is melted during the cooling operation, the stored water (W) or slurry ice (I) is directly supplied to the cooling load side and radiated. It is a thing.

As described above, in the present device, ice (I) is generated by colliding the supercooling of the aqueous solution (W) cooled to the supercooled state with the ice making pipe (6a) to eliminate it, and the ice (I) is generated. The ice (I) is sequentially released from the ice making pipe (6a) and the heat storage tank (2)
Therefore, the ice (I) in the form of slurry can be reliably and stably produced. That is, unlike the conventional static method, the ice making ability is not deteriorated due to the adhesion of ice to the cooling pipe. Further, since the ice generated in the ice making container (3) is in the form of slurry, it is possible to quickly follow the fluctuation of the cooling load during heat dissipation (when ice is melted). Further, in this embodiment, since the droplet-shaped aqueous solution (W) and the cooling air (E) in the ice making container (3) have opposite flow directions, the droplet-shaped aqueous solution (W) is cooled by the cooling air (W). Since it is cooled while being hindered by E), the cooling time can be secured for a long time, and the droplet aqueous solution (W) can always be exposed to cooling air (E) at a low temperature below the freezing temperature. In this way as well, a quick and reliable supercooled state can be obtained. Furthermore, since the ice making container and the heat storage tank are independent of each other, the generated ice is stored only in the heat storage tank, so that the ice filling rate is high, and
The entire device is downsized, and the installation location is not limited.

The ice making operation and the heat storage operation may be performed simultaneously.

Further, regarding the arrangement of the ice making pipes, when the dense portion and the sparse portion of the ice making pipes are formed as shown in FIG. 3, the cooling air has a large flow direction in the dense portion. Although it can be changed, the drop-shaped aqueous solution cannot follow the change in the flow direction of the cooling air, and most of the supercooled aqueous solution collides with the ice-making pipe, and the recovery With the improvement of the rate, the ice making efficiency can be improved. In addition, as another modification, the cross-sectional shape of the ice making pipe is an elliptical shape or a flat shape that is long in the direction perpendicular to the ice adhering surface as shown in FIGS. It is also possible to ensure withdrawal. Also,
As the ice making tube, a rod-shaped body in which a heater or the like is embedded or a heat transfer tube group may be used. Further, the ice-making tube may be made of resin, or the surface thereof may be coated with a water-repellent coating so as to promote detachment of ice.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
Since the inside of the ice making container is different from that of the first embodiment, the ice making container will be described in particular. The operation will be described focusing on the difference from the first embodiment.

As shown in FIG. 2, the ice making container (3) is provided with an air cooler (5a) above it and is supplied to the upstream end of the air flow (arrow B) generated in the air cooler (5a). Duct (5
b) The recovery duct (5e) is connected to the downstream end. In addition, a fan (F) for circulating the cooling air (E) is provided near the connection position of the recovery duct (5e) in the ice making container (3). . On the other hand, in the vicinity of the connection position of the supply duct (5b), a spray nozzle (4c) of a water supply means (4) for supplying an aqueous solution (W) in the form of droplets is provided laterally, that is, along the direction of air flow. ing. The ice making pipes (6a) of the ice making means (6) are arranged in a staggered manner on the upstream side in the vicinity of the fan (F). Further, the upstream end (7b) of the communication pipe (7a) of the ice feeding means (7) is connected to the bottom of the ice making container (3). Other configurations are substantially the same as those shown in the first embodiment.

Next, the operation in this example will be described.

First, in the same manner as in the first embodiment, in the spraying operation, the aqueous solution (W) is sprayed from the spray nozzle (4c) into the ice making container (3) in the form of a droplet, sideways, that is, toward the ice making pipe (6a). Let
The ice making operation performed together with the spraying operation is the air cooler (5a).
The cooling air (E) thus generated is supplied into the ice making container (3) through the supply duct (5b). On the other hand, an air flow is generated by the rotation of a fan (F) provided in the ice making container (3) (arrow B), and the cooling air (E) is moved rightward in the ice making container (3) by the air flow. Sent. Then, during the feeding, heat exchange is performed with the droplet-shaped aqueous solution (W) supplied from the spray nozzle (4c), the droplet-shaped aqueous solution (W) is cooled to a supercooled state, and then recovered. It is returned from the duct (5e) to the air cooler (5a) side and circulated. Then, the aqueous solution (W) cooled to the supercooled state moves in the ice making container (3) and collides with the ice making pipe (6a).
The collision removes the supercooled state of the aqueous solution (W) and makes it ice, and then adheres to the side surface of the ice making tube. In the heat storage operation, water having a temperature equal to or higher than the freezing temperature of the aqueous solution is circulated in the ice making pipe (6a) to melt the vicinity of the adhering portion of the ice (I) adhering to the ice making pipe (6a), Ice-making tube (6
After being detached from a) and temporarily stored as slurry ice (I) at the bottom of the ice making container (3), the connecting pipe (7a)
After that, the heat is fed to the heat storage tank (2) to complete the heat storage operation. In this case, in order to prevent the aqueous solution (W) from flowing into the air cooler (5a), it is desirable to provide a filter or the like on the recovery duct (5e).

As described above, in this device, in addition to the action and effect in the first embodiment, the ice adhering portion of the ice making pipe (6a) is a side surface, and therefore the adhering ice (I) is affected by gravity. It is easy to receive and can be dropped easily. Further, since the droplet-shaped aqueous solution (W) and the cooling air (E) are flown in the same horizontal direction, the droplet-shaped aqueous solution (W) may drop downward under the influence of gravity. It is guided toward the ice making tube (6a) while being suppressed by (E). In other words, the cooling air (E) is a droplet aqueous solution (W).
And a function of cooling the liquid to a supercooled state, and the droplet-shaped aqueous solution (W)
It also has the function of guiding the ice cube toward the ice making tube (6a).

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. Since this example is a modification of the ice making means,
Only the differences from the first embodiment will be described.

The ice making container (3) is a substantially cylindrical container, an air cooler (5a) is connected to an upper part thereof, and a spray ejector (4d) which is a lower end part of the water supply means (4) is connected to one side face thereof. ing. The ejector (4d) is provided with a breeze pipe (4e) arranged below the ejector (4d) to cool air (E) in the ice making container (3).
Is supplied to the ejector (4d), and the negative pressure thereof causes the spray to be emitted. On the other hand, ice making means (6)
The branch pipe (6b) branched from the water supply pipe (4a) is connected to the side surface where the ice making plate (6c) is attached so that part of the aqueous solution (W) is the ice making surface of the ice making plate (6c). It is designed to flow down to (6e). Further, the upstream end (5f) of the recovery duct (5e) of the air supply means (5) is connected to the lower side surface of the ice making container (3).

The ice making plate (6c) is erected on one side of the ice making container (3) so as to face the ejector (4d), and the surface of the ice making plate (6) collides with the supercooled aqueous solution (W) ( 6e), and a weir plate (6d) is erected at the upper end of the ice making plate (6c) to regulate the water supply amount of the aqueous solution (W) supplied from the upper branch pipe (6b). .

The water supply means (4) is provided with a precooling section (8) for precooling the aqueous solution (W) on the upstream side of the branch pipe (6b). The other structure is similar to that of the first embodiment.

In the operation of this device, first, in the spraying operation, the brine pump (P1) is driven to cool the aqueous solution (W) in the heat storage tank (3) to near the freezing temperature in the pre-cooling section (8), and the water supply pipe ( The droplets are ejected from the ejector (4d) into the ice-making container (3) via 4a). In the ice making operation performed together with the spraying operation, the cooling air (E) generated is supplied into the ice making container (3) from above the ice making container (3) by the operation of the air cooler (5a). Then, the ejector (4
After performing heat exchange with the droplet-shaped aqueous solution (W) supplied from d) to cool the droplet-shaped aqueous solution (W) to a supercooled state, the recovery duct (5e) to the air cooler (5a). Is returned to and circulated. The aqueous solution (W) cooled to the supercooled state is placed on the ice making plate (6c) in the ice making container (3).
It collides with the ice-making surface (6e). By the collision, the aqueous solution (W) is freed from the supercooled state and becomes iced, and is stored at the bottom of the ice making container (3) by the aqueous solution (W) flowing down on the ice making surface (6e). Along with the driving of (P2), it is fed and stored in the heat storage tank (2).
As described above, in the present apparatus, the elimination of the supercooled state and the detachment from the ice making surface are simultaneously performed, so that the ice making operation is simplified and the ice making time is short. Further, in this operation, the ice generated from the drop-shaped aqueous solution (W) having a freezing temperature or lower is brought into contact with the flowing aqueous solution (W) having the freezing temperature or higher while suppressing the freezing of the flowing aqueous solution (W). Only the droplet-shaped aqueous solution (W) can be iced, and a reliable ice making operation can be continuously performed.

In addition, when the aqueous solution in each of the above Examples is used alone with water, the freezing temperature is always constant because there is no change in the concentration with the progress of the ice making operation, and stable ice making can be obtained.

(Effects of the Invention) As described above, according to the present invention, the following effects are exhibited.

According to the invention described in claim (1), since the aqueous solution is made into a minute droplet and is cooled, the aqueous solution can be rapidly and surely cooled to a supercooled state, and the aqueous solution is used as an ice making tube. Since the collision is made to cancel the supercooled state, the supercooled state can be reliably canceled at a predetermined position, and the ice for heat storage can be continuously generated. Furthermore,
Since the generated ice is in the form of a slurry, it is easy to convey and the surface area is large, so that the melting speed is fast and it is possible to follow the fluctuation of the cooling load. Moreover, since the flow directions of the droplet-shaped aqueous solution and the cooling air are opposite to each other, the droplet-shaped aqueous solution is cooled while being prevented from descending by the cooling air, so that the cooling time is secured for a long time, and the droplet-shaped aqueous solution is cooled. The aqueous solution can always be exposed to cooling air at a low temperature equal to or lower than the freezing temperature, which also makes it possible to obtain a quick and reliable supercooled state. Further, the ice attached to the ice making tube of the ice making means is separated from the ice making tube by melting a part of the ice as the temperature of the surface of the ice making tube rises due to the flow of a liquid having a temperature higher than the freezing temperature of the aqueous solution inside the ice making tube. Since the heat is stored in the heat storage tank and then fed to the heat storage tank, the ice can be reliably removed from the ice making tube.

According to the invention described in claim (2), since the ice is generated and attached to the side surface of the ice making means so that the ice is easily affected by gravity, the ice can be easily detached. Also, since the droplet-shaped aqueous solution and the cooling air flow in the same horizontal direction,
This drop-shaped aqueous solution is guided toward the ice making tube while being prevented from falling downward by the influence of gravity by the cooling air. That is, the cooling air can have both the function of cooling the droplet-shaped aqueous solution to the supercooled state and the function of guiding the droplet-shaped aqueous solution toward the ice making tube.

According to the invention of claim (3), the ice-making tube has a perfect circular cross section, so that the adhered ice is reliably released. Further, if the cross section has an elliptical shape that is long in the direction perpendicular to the ice adhering surface, a more reliable detaching action can be obtained.

According to the invention of claim (4), the cooling air flows concentratedly in the sparsely dense portion of the ice making tube, and the droplet-like aqueous solution flows in the dense portion. Most of them will be collided with the ice making tubes, and the efficiency of ice making will be improved with the improvement of the recovery rate.

According to the invention of claim (5), the supercooled aqueous solution is frozen, and at the same time, the aqueous solution flowing down the ice-making surface is smoothly stored in the bottom portion of the ice-making container.
It is possible to simultaneously perform ice making by removing supercooling and detachment from the ice making surface. Further, by contacting the ice generated from the drop-shaped aqueous solution at the freezing temperature or lower with the flowing aqueous solution at the freezing temperature or higher, only the drop-shaped aqueous solution can be iced while suppressing the flow-down aqueous solution from being iced, A reliable ice making operation can be continuously performed.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an ice heat storage device in a first embodiment of the present invention, FIG. 2 is a view corresponding to FIG. 1 in a second embodiment, and FIG. 3 is a view showing an arrangement example of an ice making pipe, FIG. FIG. 5 is a view showing a modified example of the ice making tube, and FIG. 5 is a view corresponding to FIG. 1 in the third embodiment. (2) ... Heat storage tank, (3) ... Ice making container, (4) ... Water supply means, (4c) ... Spray nozzle, (5) ... Air supply means, (6) ... Ice making means, (6a) …… Ice-making tube, (6c)
...... Ice plate, (6e) ...... Ice surface, (7) ...... Ice feeding means, (I) ...... Ice, (W) …… Aqueous solution, (E) ・ ・ ・ Cooling air.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunikazu Torikoshi 1304 Kanaoka-machi, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Kanaoka Plant, Sakai Manufacturing Co., Ltd. (56) Reference JP-A 63-217170 (JP, A) JP A 63-311063 (JP, A) Actually opened 63-15473 (JP, U) Japanese Patent Sho 61-2859 (JP, B2)

Claims (5)

[Claims] 1. A water supply means (4) having a spray nozzle (4c) for ejecting an aqueous solution (W) for ice making into minute droplets and jetting it downward from the upper part to the lower part in an ice making container (3). A drop-shaped aqueous solution (W) which is supplied with cooling air (E) upward from a lower part to an upper part in the ice making container (3) and jetted into the ice making container (3) by a water supply means (4). (5) for supplying air to a supercooled state that maintains a liquid state below the freezing temperature, and a drop-like aqueous solution (W) provided in the lower part in the ice making container (3) in the supercooled state. Generated in the ice-making container (3) by colliding with each other to eliminate the supercooled state, and to make the droplet-shaped aqueous solution (W) to be iced and stored at the bottom of the ice-making container (3). Thermal storage tank (2) for frozen ice (I)
A plurality of ice-making means (7) for ice-cooling the droplet aqueous solution (W) upon collision with the supercooled droplet aqueous solution (W). Of the ice making pipe (6a), (6a) ..., The ice making pipe (6a) melts a part of the ice (I) formed on the surface thereof to make the ice making pipe (6a) An ice heat storage device, characterized in that a liquid having a temperature equal to or higher than the freezing temperature of the aqueous solution (W) is allowed to flow so as to be separated from the ice heat storage device. 2. A water supply having a spray nozzle (4c) for making an aqueous solution (W) for ice making into minute drops and ejecting it horizontally from one side to the other side in the ice making container (3). The means (4) and the cooling air (E) are horizontally fed from one side portion to the other side inside the ice making container (3), and the inside of the ice making container (3) is supplied by the water supply means (4). Air-supplying means (5) for cooling the droplet-like aqueous solution (W) ejected onto the supercooled state to maintain a liquid phase state below its freezing temperature, and the other side portion in the ice making container (3). , An ice-making means for colliding the above-mentioned supercooled droplet-shaped aqueous solution (W) to eliminate the supercooled state, and to ice the droplet-shaped aqueous solution (W) to store it in the bottom portion of the ice-making container (3) ( 6) and ice (I) produced in the ice making container (3) in a heat storage tank (2)
A plurality of ice-making means (7) for ice-cooling the droplet aqueous solution (W) upon collision with the supercooled droplet aqueous solution (W). Of the ice making pipe (6a), (6a) ..., The ice making pipe (6a) melts a part of the ice (I) formed on the surface thereof to make the ice making pipe (6a) An ice heat storage device, characterized in that a liquid having a temperature equal to or higher than the freezing temperature of the aqueous solution (W) is allowed to flow so as to be separated from the ice heat storage device. 3. The ice heat storage device according to claim 1 or 2, wherein the ice making pipe (6a) has a cross section formed into a perfect circle or an ellipse elongated in the vertical direction. Heat storage device. 4. The ice heat storage device according to claim 1, wherein the ice-making pipe (6a) has a densely arranged portion and a sparsely arranged portion. A characteristic ice heat storage device. 5. A water supply means having an ejector (4d) for horizontally ejecting an aqueous solution (W) for ice making into minute droplets from one side of the ice making container (3) toward the other side. (4) and cooling air (E) is fed into the ice making container (3), and the droplet-like aqueous solution (W) jetted into the ice making container (3) by the water supply means (4) is Air supply means (5) for cooling to a supercooled state in which the liquid state is maintained below the freezing temperature
And the drop-shaped aqueous solution (W) in the supercooled state, which is provided on the other side in the ice making container (3), collides to eliminate the supercooled state, and the drop-shaped aqueous solution (W) is iced. In addition, the water supply means (4) is branched and connected to supply a part of the aqueous solution (W) of the water supply means (4), so that the aqueous solution (W) having a freezing temperature or higher is supplied to the ice making container (3). An ice making means (6) equipped with an ice making plate (6c) having a vertically extending ice making surface (6e) flowing down to the bottom of the ice making container (3) and storing ice (I) in a heat storage tank (2). )
An ice heat storage device comprising: an ice feeding means (7) for feeding the inside.