JPH1038328A - Ice storage device - Google Patents

Abstract

(57) [Summary] [Problem] To make it possible to appropriately cope with ice clogging in an ice making cylinder 7 and to perform an ice making operation without generating heavy ice in the ice making tank 2 having a short height dimension. It is to provide an ice thermal storage device. SOLUTION: An injection port of an antifreeze liquid injection nozzle 8 and an ice making cylinder 7
The differential pressure between the bottom and the junction 13 is detected by a differential pressure detector 17, and the controller 18 controls the level of the antifreeze temperature in the antifreeze pipe 9 based on the detected differential pressure. That is, when the pressure difference at the junction 13 is large, it is determined that ice clogging has occurred in the ice making cylinder 13, and the control unit 18 stops cooling the antifreeze 11. On the other hand, when the pressure difference at the junction 13 becomes small, it is determined that the ice clogging in the ice making cylinder 7 has been resolved, and the cooling of the antifreeze liquid 11 is restarted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ice which is mainly used at nighttime to generate ice with a cooling medium and store cold heat, which is rapidly defrosted during the day to be used for a cooling device or a cooling air conditioner. The present invention relates to a heat storage device.

[0002]

2. Description of the Related Art For example, in a relatively large-capacity air conditioning system such as a building air conditioning system or a district heat supply system, an air conditioner incorporating an ice heat storage device utilizing latent heat of melting ice is applied. . In this method, ice is generated in an ice heat storage device by using inexpensive midnight power to reduce the demand for cooling power concentrated in the daytime and to reduce the load on heat source equipment. Therefore, ice heat storage devices have great expectations in the field of air conditioning. The ice heat storage device mainly uses nighttime electricity to perform an ice making operation in which antifreeze, which is a cooling medium, is directly injected into water in the heat storage tank, thereby generating sherbet-like ice in the heat storage tank to store cold heat. Then, the ice is rapidly thawed in the daytime and used for a cooling device, cooling air conditioning, or the like.

FIG. 5 shows a configuration diagram of such an ice heat storage device. The heat storage tank includes an ice storage tank 1 and an ice making tank 2. For example, when an antifreeze solution 11 having a specific gravity greater than that of water is used, an antifreeze solution storage section 3 is formed at the bottom of the ice storage tank 1 and the ice making tank 2. An antifreeze liquid pipe 4 is connected to the antifreeze liquid storage section 3, and the antifreeze liquid 1 stored in the antifreeze liquid storage section 3 is connected to the antifreeze liquid storage section 3.
1 is led to a refrigerator 6 by an antifreeze pump 5. The refrigerator 6 cools the antifreeze 11 and supplies it to the antifreeze injection nozzle 8 provided at the center of the cross section of the ice making cylinder 7.
Generates ice 12. The ice making cylinder 7 is provided on a side surface of the ice making tank 2. That is, an antifreeze liquid system (antifreeze circuit) is formed by the antifreeze storage part 3, the antifreeze pipe 4, the antifreeze pump 5, the refrigerator 6, and the ice making cylinder 7.

On the other hand, the ice 12 generated in the ice making cylinder 7 is
With the circulating water from the circulating water system (circulating water circuit), the ice making cylinder 7
From the ice making tank 2. The circulating water system includes a circulating water pipe 9 and a circulating water pump 10 connected to the bottom of the ice storage tank 1. Ice 12 generated in the ice making cylinder 7
The circulating water from the circulating water pump 10 to the ice making cylinder 7 is guided to the upper part of the ice making tank 2 through the confluence 13 of the ice making cylinder 7 and the ice making tank 2, and the ice storage tank at the end of the overflow. It returns to 1. Further, a cooling water pipe 14 is provided in the refrigerator 6, and the cooling water subjected to heat exchange in the refrigerator 6 is guided to a cooling tower 16 by a cooling water pump 15, cooled, and returned to the refrigerator 6.

[0005] In the conventional ice regenerator having such a configuration, during the ice making operation, the antifreeze 11 is supplied from the antifreeze reservoir 3 at the bottom of the ice storage tank 1 and the icemaker 2 by the antifreeze pump 5 via the antifreeze pipe 4. Sent to 6. Then, after being cooled to 0 ° C. or lower by the refrigerator 6, it is sent to the antifreeze injection nozzle 8 and is injected from the center of the ice making cylinder 7 by the antifreeze injection nozzle 8. Thus, sherbet-like ice 12 is generated by direct contact heat exchange between the antifreeze liquid 11 and water in the ice making cylinder 7.

As shown in FIG. 6, the antifreeze 11 having generated ice in the ice-making cylinder 7 falls naturally while passing through the ice-making cylinder 7 due to a difference in specific gravity with water. 13
After dropping, the ice 12 branches off at the junction 13 and returns to the antifreeze reservoir 3 at the bottom of the ice making tank 2.

On the other hand, the ice 12 generated in the ice making cylinder 7 is pushed down to the bottom of the ice making cylinder 7 by the circulating water supplied into the ice making cylinder 7 through the circulating water pipe 9, and at the junction 13 at the bottom of the ice making cylinder 7. It branches off with the antifreeze 11 and is stored in the upper part of the ice making tank 2. Thereafter, the cycle of storing the ice in the ice storage tank 1 due to overflow from the upper part of the ice making tank 2 is repeated. Further, a part of the antifreeze 11 moves to the ice storage tank 1 together with the ice 12, and thus is collected in the antifreeze storage part 3 at the bottom of the ice storage tank 1.

[0008]

However, such a conventional ice heat storage device has the following problems. (1) Since the ice making cylinder 7 in which the ice 12 is generated needs to store water, it is necessary to use a water-resistant metal material.
Further, the ice 12 generated in the ice making cylinder 7 is sent out through the inner side surface of the ice making cylinder 7, but the metal material is supercooled due to its large heat capacity, and the ice 12 flows out from the ice making cylinder 7 to the ice making tank 2. During the process, ice 12 adheres to the surface of the ice making cylinder 7 and grows, and there is a problem that ice clogging occurs in the ice making cylinder 7. (2) In the case where the height dimension cannot be sufficiently taken due to the installation space of the ice making tank 2, ice 12 containing the antifreeze liquid 11 is generated, and becomes ice 12 having a specific gravity heavier than pure ice. May hinder the levitation.

That is, when the height of the ice-making tank 2 is small, the mounting height of the antifreeze injection nozzle 8 provided on the ice making cylinder 7 on the side of the ice-making tank 2 becomes low, and the antifreeze at 0 ° C. or lower is injected with the antifreeze. The heat exchange distance that is sprayed from the nozzle 8 into the ice making cylinder 7 and falls while exchanging heat with water becomes shorter. As a result, the surface temperature of the antifreeze liquid 11 becomes equal to that of water due to heat exchange, but falls to the bottom of the ice making cylinder 7 while the internal temperature of the antifreeze liquid 11 remains low and joins at the junction 13 at the bottom of the ice making cylinder 7. Due to the non-rectification due to the flow, the low-temperature portion of the antifreeze liquid 11 and the water exchange heat again to generate ice 12. Confluence 1 at the bottom of this ice making cylinder 7
A large amount of antifreeze 11 is mixed and included in the ice 12 generated in step 3, and ice having a specific gravity higher than that of pure ice is generated.
This may cause the floating of the ice 12 to be hindered.

In this case, the heavy ice 12 generated in the junction 13 does not float on the top of the ice making tank 2 but absorbs the ice 12 generated later while floating on the bottom of the ice making tank 2. Grow while growing. Finally, the junction at the bottom of the ice making cylinder 7 is closed, and ice 1 having a low specific gravity generated in the ice making cylinder 7 is formed.
2 could interfere with the transfer. Further, when the heavy ice 12 grows and accumulates in a large amount in the antifreeze storage part 3 at the bottom of the ice making tank 2, water is sucked into the refrigerator 6 in order to inhibit the formation of the circulating antifreeze 11. Finally, refrigerator 6
Freezing could also occur within.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ice storage device capable of appropriately coping with ice clogging in an ice making cylinder and capable of performing ice making operation without generating heavy ice in an ice making tank having a short height dimension. It is to provide a device.

[0012]

According to the first aspect of the present invention, there is provided a heat storage tank for storing water serving as a heat storage medium and comprising an ice storage tank and an ice making tank, and an ice making device installed on a side of the ice making tank of the heat storage tank to generate ice. A cylinder, an antifreeze pump for supplying antifreeze for generating ice to the ice making cylinder, a refrigerator for cooling the antifreeze, an antifreeze injection nozzle for ejecting the antifreeze into the ice making cylinder, and ice generated in the ice making cylinder And a circulating water pump for supplying circulating water for flushing water from the ice making cylinder to the ice making tank, wherein the difference between the junction of the ice making cylinder and the ice making tank and the injection port of the antifreeze liquid injection nozzle is provided. A differential pressure detector for detecting pressure and a controller for controlling the temperature of the antifreeze based on the differential pressure detected by the differential pressure detector are provided.

According to the first aspect of the present invention, based on the pressure difference between the injection port of the antifreeze injection nozzle and the junction of the bottom of the ice making cylinder,
The controller controls the level of the antifreeze temperature in the antifreeze pipe.

According to a second aspect of the present invention, in the first aspect of the invention, the controller stops the cooling of the refrigerating fluid by the refrigerator when the differential pressure detected by the differential pressure detector exceeds a predetermined value.
Thereafter, when the differential pressure becomes equal to or less than a predetermined value, the cooling of the frozen liquid by the refrigerator is restarted.

According to a second aspect of the present invention, in addition to the operation of the first aspect, when the pressure difference at the junction is large, it is determined that ice clogging has occurred in the ice making cylinder, and the control unit determines Stop cooling. On the other hand, when the differential pressure at the junction becomes small, it is determined that the ice clogging in the ice making cylinder has been resolved, and the cooling of the antifreeze liquid is restarted.

According to a third aspect of the present invention, in the first aspect of the invention, the controller controls the flow rate of the circulating water based on the differential pressure detected by the differential pressure detector instead of controlling the temperature of the antifreeze. It was made.

According to a third aspect of the invention, instead of the operation of the first aspect of the invention, the flow rate of the circulating water in the circulating water pipe is controlled based on the pressure difference in the ice making cylinder. When the pressure difference is large, the circulating water flow is increased to force the clogged ice into the ice making tank.

According to a fourth aspect of the present invention, in the first aspect, the controller increases the flow rate of the circulating water from the circulating water pump when the differential pressure detected by the differential pressure detector exceeds a predetermined value. If the differential pressure does not become lower than the predetermined value even after the predetermined time has elapsed, the cooling of the refrigerant by the refrigerator is stopped, and if the differential pressure becomes lower than the predetermined value, the cooling of the refrigerant by the refrigerator is performed. Is to be restarted.

According to the fourth aspect of the invention, in addition to the operation of the first aspect, when the pressure difference in the ice making cylinder is large, the circulating water flow is first increased to force the clogged ice into the ice making tank. Send it in. If the differential pressure still remains high, the control unit stops cooling the antifreeze. When the differential pressure becomes small, it is determined that the ice clogging in the ice making cylinder has been eliminated, and the cooling of the antifreeze liquid is restarted.

According to a fifth aspect of the present invention, there is provided a heat storage tank for storing water serving as a heat storage medium and comprising an ice storage tank and an ice making tank; an ice making cylinder installed on the side of the ice making tank of the heat storage tank to generate ice; An antifreeze pump that supplies antifreeze to generate ice, a refrigerator that cools the antifreeze, an antifreeze injection nozzle that ejects antifreeze into the ice making cylinder, and an ice-making tank that makes ice generated in the ice making cylinder from the ice making cylinder An ice heat storage device comprising: a circulating water pump that supplies circulating water for flushing to the chiller; and a cooling water pump that circulates the chiller by cooling the cooling water that has undergone heat exchange with the refrigerator through a cooling tower. A temperature detector that detects the temperature of the junction of the cylinder and the ice making tank, and an electric three-way valve that switches the cooling water that has undergone heat exchange with the refrigerator to either the cooling tower or the bottom of the ice making tank and passes water therethrough, When the temperature detected by the temperature detector is lower than a predetermined value It is obtained by a controller for controlling the water temperature in the vicinity of the switching junction unit to the electrically-driven three-way valve on the bottom side of the ice making tank.

According to the fifth aspect of the present invention, in response to the detection of 0 ° C. by the adhesion of ice by the temperature detector provided at the junction of the bottom of the ice making cylinder, the cooling water which has completed the heat exchange in the refrigerator by the electric three-way valve is used. Water is passed through the bottom of the ice making tank. That is, a heat source is supplied from the refrigerator to the junction at the bottom of the ice making tank. This controls the level of the water temperature near the junction.

According to a sixth aspect of the present invention, there is provided a heat storage tank that stores water serving as a heat storage medium and includes an ice storage tank and an ice making tank, an ice making cylinder for producing ice, and an antifreeze liquid for producing ice in the ice making cylinder. Antifreeze pump, a refrigerator for cooling the antifreeze, an antifreeze injection nozzle for jetting the antifreeze into the ice making cylinder, and a circulating water for flushing ice generated in the ice making cylinder from the ice making cylinder to the ice making tank. An ice heat storage device provided with a circulating water pump, wherein an ice making cylinder is provided at the center of the inside of the ice making tank, and the antifreeze injected into the ice making cylinder falls straight down due to a difference in specific gravity with water, so that the bottom of the ice making tank becomes The ice stored in the antifreeze storage section and generated in the ice making cylinder floats along the outer peripheral wall of the ice making tank by the water flow from the ice making cylinder, and is stored in the upper part of the ice making tank.

According to the sixth aspect of the present invention, the antifreeze sprayed in the ice making cylinder installed on the upper surface of the inside of the ice maker causes unrectification until the flow after the injection reaches the antifreeze storage at the bottom of the ice maker. Flows without pressure loss.

[0024]

Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram showing a first embodiment of the present invention. The first embodiment is different from the conventional example shown in FIG. 5 in that a differential pressure for detecting a differential pressure between a junction 13 between the ice making cylinder 7 and the ice making tank 2 and an injection port of the antifreeze liquid injection nozzle 8 is detected. Detector 1
7, and a controller 18 for controlling the temperature of the antifreeze based on the differential pressure detected by the differential pressure detector is additionally provided. In FIG. 1, the illustration of the cooling water pipe 14, the cooling water pump 15, and the cooling tower 16 of the cooling system is omitted.

In FIG. 1, during the ice making operation, the antifreeze 1
1 is cooled to 0 ° C. or lower by a refrigerator 6. The cooled antifreeze is supplied to the antifreeze injection nozzle 8 in the ice making cylinder 7 through the antifreeze pipe 4 and is injected into the ice making cylinder 7.
Thereby, ice 12 is generated by direct contact heat exchange with water in the ice making cylinder 7. On the other hand, the ice 1 generated in the ice making cylinder 7
The circulating water 2 flows from the circulating water pipe 9 to the junction 13 at the bottom of the ice-making cylinder 7 while passing through the inner side surface of the ice-making cylinder 7. In the process of flowing from the antifreeze injection nozzle 8 to the junction 18, the ice 12 flows while passing through the inner side surface of the ice making cylinder 7, so that the ice 12 adheres and grows on the surface of the metal material in consideration of water pressure resistance. Sometimes.

When the ice 12 adheres to the inner surface of the ice making cylinder 7, a large pressure difference is generated in the ice making cylinder 7. This differential pressure is detected by a differential pressure detector 17 provided between the outlet of the antifreeze liquid injection nozzle 8 and the junction 13. That is, when the differential pressure detected by the differential pressure detector 17 is larger than the predetermined value, the controller 18 stops the refrigerator 6 and uses the antifreeze liquid 11 near 0 ° C. and the circulating water to circulate the inner side surface of the ice making cylinder 7. The ice 12 attached to the ice is thawed. After the adhered ice 12 is thawed, the pressure difference in the ice making cylinder 7 returns to normal, and the controller 18 again operates the refrigerator 6 to start the ice making operation.

As described above, in the first embodiment, the antifreeze 11 extracted from the antifreeze storage section 3 at the bottom of the ice storage tank 1 and the ice making tank 2 through the antifreeze liquid pipe 4 is supplied to the refrigerator 6 to be cooled to 0 ° C. or less. After being cooled, it is injected into the ice making cylinder through an antifreeze injection nozzle 8 at the center of the ice making cylinder 7 made of a metal material placed on the side of the ice making tank 2, and by direct contact heat exchange with water in the ice making cylinder 7. Ice 12 is produced. On the other hand, the ice 12 generated in the ice making cylinder 7 is pushed from the ice making cylinder 7 to the ice making tank 2 through the inner side surface of the ice making cylinder 7. At this time, ice 12 may adhere to the inner side surface of the ice making cylinder 7 made of a metal material.

The adhesion of the ice 12 is caused by the antifreeze spray nozzle 8
Is detected as a large differential pressure by a differential pressure detector 17 provided between the jet port of the nozzle and the junction 13 at the bottom of the ice making cylinder 7. In other words, when the ice differential is increased due to ice clogging in the ice making cylinder 7, the controller 18 is operated by the differential pressure detector 17 to stop the refrigerator 6. Then, the temperature of the antifreeze solution in the antifreeze solution pipe 4 is increased, and the ice 12 is thawed to remove the ice 12 attached to the inside of the ice making cylinder 7. Then, when the ice clogging in the ice making cylinder 7 is eliminated, the differential pressure in the ice making cylinder 7 returns to normal, and the controller 18 causes the refrigerator 6 to operate again.

As described above, according to the first embodiment, the provision of the differential pressure detector 17 in the ice making cylinder 7 allows the controller 18 to operate based on the differential pressure from the differential pressure detector 17. Only when the differential pressure in the ice making cylinder 7 rises due to ice clogging, the refrigerator 6 is stopped, and the ice is efficiently thawed by the heat capacity of the antifreeze liquid 11 near 0 ° C. and the circulating water in the circulating water pipe 9. Can be done. This makes it possible to provide an ice heat storage device capable of stably making ice.

Next, a second embodiment of the present invention will be described. FIG. 2 is a configuration diagram showing a second embodiment of the present invention. The second embodiment differs from the first embodiment shown in FIG. 1 in that the controller 18 has a function of controlling the flow rate of the circulating water based on the differential pressure detected by the differential pressure detector 17. When the differential pressure detected by the differential pressure detector 17 exceeds a predetermined value, the controller 18 first increases the flow rate of the circulating water from the circulating water pump 10, A predetermined time is counted, and if the differential pressure does not become equal to or less than the predetermined value even after the predetermined time has elapsed, the cooling of the refrigerating fluid 11 by the refrigerator 6 is stopped, and thereafter, the differential pressure becomes equal to or less than the predetermined value. At this time, the cooling of the frozen liquid 11 by the refrigerator 6 is restarted.

In FIG. 2, the ice 12 is generated in the ice making cylinder 7 as in the first embodiment.
Is shed. On the other hand, when ice clogging occurs in the ice making cylinder 7, the differential pressure detector 17 detects a large differential pressure.

That is, when the ice making cylinder 7 is clogged with ice, the pressure difference between the jet port of the antifreeze injection nozzle 8 and the junction 13 increases, so that the antifreeze injection nozzle 8 and the junction 13
And the differential pressure detector 17 provided between them operates. Then, the controller 18 causes the circulating water pump 10 to perform an overload operation to increase the circulating water flow rate and to melt the ice 12 attached to the inner side surface inside the ice making cylinder 7. If the differential pressure in the ice making cylinder 7 does not return to normal even after a predetermined time (about several minutes) set in the timer 19, the refrigerator 6 is stopped to temporarily suppress the ice generating ability, Improves the ability to thaw ice.

In the second embodiment, when a large differential pressure in the ice making cylinder 7 is detected, the flow rate of the circulating water in the circulating water pipe 9 is first increased. This is because when the refrigerator 6 is stopped, the ability to generate the ice 12 in the ice making cylinder 7 is reduced and the heat storage efficiency is reduced, so that it is necessary to minimize the operation stop of the refrigerator 6. It is. Therefore, the refrigerator 6 is stopped only when the differential pressure of the differential pressure detector 17 does not decrease even if the circulating water flow rate is increased. In this way, the generation of ice 12 is prevented from decreasing in the rainfall area.

As described above, in the second embodiment, since the ice heat storage device is a system for storing cold heat, when the refrigerator 6 is stopped for a long time and the temperature of the antifreeze in the antifreeze pipe 4 is increased. In this case, since the ability to generate ice 12 is accordingly reduced and the heat storage efficiency is reduced, it is possible to minimize the increase in the temperature of the antifreeze solution and to quickly remove the ice clogging in the ice making cylinder 7. In other words, the fact that ice clogging has occurred in the ice making cylinder 7 and the differential pressure has increased has resulted in the differential pressure detector 17
First, the controller 18 causes the controller 18 to overload the circulating water pump 10 to increase the circulating water flow rate in the circulating water pipe 9. This increases the heat source and water pressure of the circulating water itself, so that ice attached to the ice making cylinder is removed more quickly.
Thereafter, when the ice clogging in the ice making cylinder 7 is eliminated, the differential pressure in the ice making cylinder 7 returns to normal, so that the circulating water pump 10 is returned to the normal operation.

If the differential pressure of the differential pressure detector 17 does not decrease due to the increase in the flow rate of the circulating water, the operation of the refrigerator 6 is stopped and the temperature of the antifreeze in the antifreeze pipe 4 is increased to increase the temperature of the ice 1.
2 is thawed to remove ice adhering in the ice making cylinder 7. Then, when the pressure difference becomes small and the adhesion of the ice 12 is eliminated, the operation of the refrigerator 6 is started again.

As described above, according to the second embodiment, the operation state of the circulating water pump 10 is changed to the overload operation state in accordance with the signal of the differential pressure detector 17 provided in the ice making cylinder 7. By switching to increase the circulating water flow rate, ice clogging in the ice making cylinder 7 can be more effectively removed.
Further, in order to remove ice clogging in the ice making cylinder 7, first, an overload operation of the circulating water pump 10 is performed,
Is started and stopped, it is possible to minimize a decrease in the action of generating ice in the ice making cylinder 7.

In the above description, a case has been described where the circulating water flow rate is increased when the differential pressure detector detects a large differential pressure, and the refrigerator 6 is started and stopped. Only the function of increasing the flow rate may be provided. This is because, by appropriately selecting the set value of the differential pressure of the differential pressure detector 17, the ice clogging in the ice making cylinder 7 can be eliminated only by the control for increasing the circulating water flow rate.

Next, a third embodiment of the present invention will be described. FIG. 3 is a configuration diagram showing a third embodiment of the present invention. The third embodiment is different from the first embodiment shown in FIG. 1 in that a temperature detection for detecting a temperature of a junction 13 between the ice making cylinder 7 and the ice making tank 2 instead of the differential pressure detector 17 is performed. An electric three-way valve 21 is provided for switching the cooling water, which has exchanged heat with the refrigerator 6, to either the cooling tower 16 or the bottom of the ice making tank 2 to pass water. When the detected temperature is equal to or lower than the predetermined value, the electric three-way valve 21
Is switched to the bottom side of the ice making tank 2 to control the water temperature near the junction 13. That is, the temperature detector 2
On the basis of the detected bottom temperature of the ice making tank 1, the cooling water of the refrigerator 6 is passed through the bottom of the ice making tank 2 as a heat source to control the water temperature near the junction 13.

In FIG. 3, the confluence 13 at the bottom of the ice making cylinder 7 is shown.
Is provided with a temperature detector 20, and the controller 18 is provided with a temperature detector 20.
The electric three-way valve 21 is switched in accordance with the signal of the above, and the flow rate of the high temperature side fluid of the refrigerator 6 is controlled to
3).

Here, the cooling water system that exchanges heat with the refrigerator 6 includes a cooling water pipe 14, a cooling water pump 15, a cooling tower 16
An electric three-way valve 21 is provided on the cooling water pump 15 outlet side of the cooling water system, and a second cooling water pipe 22 is provided on one of the discharge sides of the electric three-way valve 21 so that the bottom of the ice making tank 2 is provided. Connected. That is, the cooling water of the heat source bypassing the cooling tower 16 is guided to the bottom of the ice making tank 2. Further, since the cooling water is supplied from the cooling water system to the heat storage tank side by the second cooling water pipe 22, the third cooling water pipe 23 is provided to supply the cooling water from the heat storage tank side.

During the ice making operation, ice 12 is generated in the ice making cylinder 7 as in the first embodiment. On the other hand, the antifreeze 11 after the ice 12 has been generated naturally falls through the center of the ice making cylinder 7 to the junction 18 at the bottom of the ice making cylinder 7 due to the specific gravity difference with water, and the generated ice 12 Is passed through the inner side of the ice making cylinder 7 and is circulated by the circulating water in the circulating water pipe 9.
It flows down to the junction 13 at the bottom. At the junction 13 at the bottom of the ice making cylinder 7, ice 12 having a high specific gravity is generated again by direct contact heat exchange between water and the antifreeze liquid 11.

After that, the heavy ice 12 absorbs the other ice 12 while floating in the water of the ice making tank 2 and grows, and the heavy ice 12 closes the junction of the junction 18. Become. In such a state, the temperature detector 20 provided in the merging section 18 detects that the merging section 13
To detect a temperature of about 0 ° C.

The controller 18 controls the temperature detector 20 so that the junction 1
When the low temperature of 3 is detected, the electric three-way valve 21 provided in the cooling water system is opened and closed to supply the cooling water to the second cooling water pipe 22 to supply the cooling water to the bottom of the ice making tank 2. . As a result, the water temperature at the bottom of the ice making tank 2 is raised, so that the heavy ice 12 floating at the bottom of the ice making tank 2 is thawed. At this time, the controller 18 controls the cooling tower 16.
Stop the operation of.

As described above, in the third embodiment, when the ice 12 having a high specific gravity generated at the bottom of the ice making tank 2 is to be thawed, ice heat storage is performed rather than warming the bottom of the ice making tank using external heat. The system efficiency as an ice heat storage device is higher when the ice 12 having a higher specific gravity at the bottom of the ice making tank 2 is thawed using the heat generated in the device. Therefore, the cooling water heated after exchanging heat with the antifreeze liquid 11 in the refrigerator 6 is again supplied to the cooling tower 1.
Before cooling at 6, the cooling water pump 15 branches off at the outlet side, and water is passed to the bottom of the ice making tank 2. Then, a third cooling water pipe 23 returning to the inlet side of the refrigerator 6 is provided, and the bottom of the ice making tank 2 is heated with the cooling water heated by the refrigerator 6.

Thus, without using external heat, the bottom of the ice-making tank can be heated to melt the ice 12 having a high specific gravity, and while the cooling water is flowing through the bottom of the ice-making tank 2,
Since the water in the ice making tank 2 at the time of the ice making operation is near 0 ° C., the water cooling operation by the cooling tower 16 becomes unnecessary, so that a more efficient ice heat storage device can be provided.

As described above, according to the third embodiment, by providing the temperature detector 20 at the junction 13 at the bottom of the ice making cylinder 7, the vicinity of the junction 13 due to the growth of the ice 12 having a high specific gravity is provided. The temperature is detected, and only when the temperature is low (about 0 ° C.), the warming action from the hot cooling water of the refrigerator 6 works, and the ice 12 having a heavy specific gravity can be efficiently thawed. In addition, the ice making tank 2 is opened by melting the heavy ice 12.
Without reducing the amount of antifreeze in the antifreeze storage part 3 at the bottom of the refrigerator, freezing of the refrigerator 6 due to water entering the antifreeze pipe 4 can be prevented. Further, since the cooling water flowing to the bottom of the ice making tank 2 is a heat supply in the same system, there is no cooling heat loss in the system system and the heat storage efficiency is not reduced.

Next, a fourth embodiment of the present invention will be described. FIG. 4 is a configuration diagram showing a fourth embodiment of the present invention. In the fourth embodiment, the ice making cylinder 7 is provided at the center of the inside of the ice making tank 2, and the antifreeze solution 11 injected into the ice making cylinder 7 is provided.
Falls straight down due to the specific gravity difference with water and is stored in the antifreeze storage section 3 at the bottom of the ice making tank 2, and the ice 12 generated in the ice making cylinder 7 is caused by the water flow from the ice making cylinder 7. And rises along the outer peripheral wall of the ice making tank and is stored in the upper part of the ice making tank 2.

In FIG. 4, an ice-making cylinder 7 made of a metal material provided on the side surface of the ice-making tank 2 is changed to a plastic material having a small heat capacity and is installed on the upper surface inside the ice-making tank 2. As in the first embodiment, during the ice making operation, the antifreeze 11 cooled to 0 ° C. or lower by the refrigerator 6 flows through the antifreeze pipe 4 from the upper surface of the ice maker 2 into the ice maker 2. That is, the antifreeze injection nozzle 8 in the ice making cylinder 7 provided on the inner upper surface of the ice making tank 2
The ice 12 is generated by direct contact heat exchange with water in the ice making cylinder 7 by being supplied into the ice making cylinder 7 and being injected into the ice making cylinder 7.

On the other hand, the ice 12 generated in the ice making cylinder 7 is pushed by the circulating water supplied through the circulating water pipe 9 through the inner side surface of the ice making cylinder 7 to the junction 13 at the bottom of the ice making cylinder 7 and merged. At the portion 13, it is dispersed around the outside. In this case, since the ice making cylinder 7 is made of a plastic material,
No ice build-up on the interior surface of Further, the antifreeze 11 that has been in direct contact heat exchange with water in the ice making cylinder 7 falls straight down through the center of the ice making cylinder 7 due to the difference in specific gravity with water. Therefore, the flow does not become unrectified in the merging section 13, and the antifreeze storage section 3 at the bottom of the ice making tank 2 is formed.
Reach

As described above, in the fourth embodiment, the antifreeze 11 cooled to 0 ° C. or less by the refrigerator 6
Ice is injected into the ice making cylinder 7 through an antifreeze injection nozzle 8 at the center of the ice making cylinder 7 made of a material having a small heat capacity and installed on the inner upper surface of the ice making tank 2, and ice is formed by direct contact heat exchange with water in the ice making cylinder 7. 12 is generated. On the other hand, the ice 12 generated in the ice making cylinder 7 does not cause ice adhesion on the surface of the ice making cylinder,
The ice is made to flow from the ice making cylinder 7 to the ice making tank 2 through the inner side surface of the ice making cylinder 7. Further, the antifreeze 11 after the direct contact heat exchange with water in the ice making cylinder 7 passes through the center of the ice making cylinder 7 while
Due to the difference in specific gravity from water, the ice falls straight down to the antifreeze reservoir 3 at the bottom of the ice making cylinder 7.

Thus, the ice 1 generated in the ice making cylinder 7
2 is that the inner surface of the ice making cylinder 7 is smooth, so that ice does not adhere to the inner surface of the ice making cylinder 7;
Is washed away. Further, the antifreeze liquid 11 that has been subjected to direct contact heat exchange with water in the ice making cylinder 7 is less likely to be unrectified in the junction 13 and is less likely to be in direct contact heat exchange with water again in the junction 13, and therefore has a high specific gravity. Generation of ice 12 can be suppressed, and the ice making operation can be stably performed.

As described above, according to the fourth embodiment, the antifreeze 11 having generated ice in the ice making cylinder 7 falls straight down naturally while passing through the center of the ice making tank 7. The flow can be prevented from rectifying until it reaches the antifreeze reservoir 3 at the bottom of the ice making tank 2, and the ice 1 having a high specific gravity can be suppressed.
2 can be suppressed. Further, by using a plastic material having a small heat capacity for the ice making cylinder 7 provided in the ice making tank 2, it is possible to flush the ice making cylinder 7 to the junction 13 without causing ice to adhere to the surface inside the ice making cylinder 7.

[0053]

As described above, according to the present invention, when ice clogging occurs in an ice making cylinder, it can be dealt with immediately and immediately.
Further, it is possible to provide an ice heat storage device capable of performing a stable ice making operation without generating heavy ice at the bottom of the ice making tank even in an ice making tank having a short dimension in the height direction.

That is, the invention of claim 1 and claim 2
According to the invention, the differential pressure detector is provided between the injection port of the antifreeze liquid injection nozzle and the junction in the ice making cylinder, and the refrigerator is started and stopped according to the signal of the differential pressure detector. Ice clogging can be prevented, and stable ice making operation can be performed.

According to the third and fourth aspects of the present invention, a differential pressure detector is provided between the injection port of the antifreeze liquid injection nozzle and the junction in the ice making cylinder, and the differential pressure detector responds to a signal from the differential pressure detector. By removing the ice clogging in the ice making cylinder by increasing the circulating water flow rate in the circulating water piping, the operation of stopping the refrigerator can be minimized, and the heat of direct contact between antifreeze at 0 ° C or lower and water can be minimized. Highly efficient ice making operation can be performed without impairing the ice generation action by the replacement.

According to the fifth aspect of the present invention, the temperature of the bottom of the ice making tank is heated by using the hot cooling water of the cooling water system of the refrigerator as a heat source of the bottom of the ice making tank, so that the heat storage efficiency can be easily reduced without lowering the heat storage efficiency. The ice with a high specific gravity floating at the bottom of the ice making tank can be thawed. In addition, it is possible to prevent the ice having a high specific gravity from impeding the formation of the flow path of the antifreeze solution, thereby enabling a stable ice making operation.

Further, by using the cooling water in the ice making tank as the hot cooling water for the refrigerator, the water temperature in the ice making tank is close to 0 ° C. during the ice making operation, so that the operation of the cooling tower can be stopped. A highly efficient ice heat storage device can be provided.

According to the sixth aspect of the present invention, by installing the ice making cylinder provided on the side of the ice making tank on the upper surface inside the ice making tank, the antifreeze after ice is generated in the ice making cylinder is supplied to the center of the ice making cylinder. Since it can fall naturally while passing straight, it is possible to suppress the effect of ice generation due to unrectification until reaching the antifreeze reservoir at the bottom of the ice making tank, and to suppress the effect of generating ice having a heavy specific gravity. In addition, by using a non-metallic material having a small heat capacity without considering the water pressure in the ice making cylinder provided in the ice making tank, the ice generated in the ice making cylinder is flushed to the junction without causing ice adhesion on the surface of the ice making cylinder. Can be

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of an ice heat storage device according to a conventional example.

FIG. 6 is a detailed view of an ice making cylinder and a merging section in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ice storage tank 2 Ice making tank 3 Anti-freezing liquid storage tank 4 Anti-freezing liquid piping 5 Anti-freezing liquid pump 6 Refrigerator 7 Ice making cylinder 8 Anti-freezing liquid injection nozzle 9 Circulating water pipe 10 Circulating water pump 11 Anti-freezing liquid 12 Ice 13 Merging part 14 Cooling water pipe 15 Cooling water pump 16 Cooling tower 17 Differential pressure detector 18 Controller 19 Sensor 20 Temperature detector 21 Electric three-way valve 22 Second cooling water pipe 23 Third cooling water pipe

Claims (6)

[Claims] 1. A heat storage tank for storing water serving as a heat storage medium and comprising an ice storage tank and an ice making tank; an ice making cylinder installed on the side of the ice making tank of the heat storage tank to generate ice; An antifreeze pump for supplying antifreeze for generating the antifreeze, a refrigerator for cooling the antifreeze, an antifreeze injection nozzle for ejecting antifreeze into the ice making cylinder, and ice generated in the ice making cylinder from the ice making cylinder. An ice heat storage device including a circulating water pump that supplies circulating water for flushing to the ice making tank, wherein a differential pressure between a junction between the ice making cylinder and the ice making tank and an injection port of the antifreeze liquid injection nozzle is adjusted. An ice heat storage device comprising: a differential pressure detector for detecting; and a controller for controlling a temperature of the antifreeze based on the differential pressure detected by the differential pressure detector. 2. The controller according to claim 1, wherein when the differential pressure detected by the differential pressure detector exceeds a predetermined value, the controller stops cooling the frozen liquid by the refrigerator, and thereafter, the differential pressure is equal to or less than a predetermined value. 2. The ice heat storage device according to claim 1, wherein the cooling of the frozen liquid by the refrigerator is restarted when the temperature becomes zero. 3. The ice as claimed in claim 3, wherein the controller controls the flow rate of the circulating water based on the differential pressure detected by the differential pressure detector, instead of controlling the temperature of the antifreeze liquid. Heat storage device. 4. The controller, when the differential pressure detected by the differential pressure detector exceeds a predetermined value, increases the flow rate of the circulating water from the circulating water pump, and a predetermined time elapses. Even when the differential pressure does not fall below the predetermined value, the cooling of the frozen liquid by the refrigerator is stopped, and when the differential pressure falls below the predetermined value, cooling of the frozen liquid by the refrigerator is restarted. The ice heat storage device according to claim 1, wherein the temperature of the ice heat storage device is reduced. 5. A heat storage tank for storing water serving as a heat storage medium and comprising an ice storage tank and an ice making tank; an ice making cylinder installed on a side surface of the ice making tank of the heat storage tank to generate ice; An antifreeze pump for supplying antifreeze for generating the antifreeze, a refrigerator for cooling the antifreeze, an antifreeze injection nozzle for ejecting antifreeze into the ice making cylinder, and ice generated in the ice making cylinder from the ice making cylinder. An ice heat storage device comprising: a circulating water pump that supplies circulating water for flushing to the ice-making tank; and a cooling water pump that cools cooling water that has exchanged heat with the refrigerator through a cooling tower and circulates the refrigerator. A temperature detector for detecting the temperature of the junction of the ice making cylinder and the ice making tank, and switching the cooling water that has exchanged heat with the refrigerator to either the cooling tower or the bottom of the ice making tank. An electric three-way valve for passing water, When the temperature detected by the temperature detector is equal to or lower than a predetermined value, a controller that switches the electric three-way valve to the bottom side of the ice making tank and controls a water temperature near the junction. apparatus. 6. An antifreeze pump for storing water serving as a heat storage medium and comprising an ice storage tank and an ice making tank, an ice making cylinder for producing ice, and an antifreeze liquid pump for supplying an antifreeze liquid for producing ice to the ice making cylinder. A refrigerator for cooling the antifreeze, an antifreeze injection nozzle for jetting the antifreeze into the ice making cylinder, and a circulating water for flushing ice generated in the ice making cylinder from the ice making cylinder to the ice making tank. An ice heat storage device provided with a circulating water pump, wherein the ice making cylinder is provided at the center of the inside of the ice making tank, and the antifreeze injected into the ice making cylinder falls straight down due to a difference in specific gravity with water. The ice is stored in an antifreeze storage portion at the bottom of the ice making tank, and the ice generated in the ice making cylinder floats along the outer peripheral wall of the ice making tank by a water flow from inside the ice making cylinder, and is stored at the top of the ice making tank. It is characterized by having such a structure Ice storage device.