JP3367274B2 - Ice storage device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice heat storage device for use in building air conditioning, district cooling and ice-cooled food production and processing.

[0002]

2. Description of the Related Art FIG. 12 shows, for example, Japanese Patent Laid-Open No. 3-91635.
It is a block diagram which shows the 1st conventional ice heat storage device of the publication. In the figure, reference numeral 1 denotes a refrigerator, which includes a compressor 2, a condenser 3, a flow control valve 4, and an evaporator 5 as main constituent devices. 6 is an aqueous solution to which an additive such as potassium salt or sodium salt is added so that supercooling can be stably taken large, 7 is sherbet-like ice suspended in the aqueous solution 6, and 8 is a sherbet composed of the aqueous solution 6 and fine ice particles. A heat storage tank for storing ice-shaped ice 7, and 9 is a supercooling releasing means for releasing supercooling of the aqueous solution supercooled by the evaporator 5 and generating sherbet-shaped ice 7, for example, an ice block of a predetermined size. It is provided near the outlet of the supercooled aqueous solution. 1
0 is a water circulation pump for circulating the aqueous solution 6, 11 is one of which is connected to the heat storage tank 8, the water circulation pump 10 and the evaporator 5 are sequentially connected, and the aqueous solution 6 supercooled by the evaporator 5 is supercooled releasing means 9 It is a water circuit leading to. The aqueous solution 6
In some cases, no additives are added and only water is used.

Next, the operation will be described. The aqueous solution 6 supercooled to several degrees below the freezing point (about −2 ° C.) by the evaporator 5 of the refrigerator 1 is the supercooling releasing means 9 provided on the upper part of the heat storage tank 8 through the water circulation path 11. The supercooled state is broken by an ice lump of a predetermined size, and sherbet-shaped ice 7 corresponding to the amount of heat of supercooling is obtained. The sorbet-shaped ice 7 flows into the heat storage tank 8 together with the remaining aqueous solution 6 that has not turned into ice, and floats in the heat storage tank 8 above the aqueous solution 6 having a freezing point temperature of 0 ° C. The aqueous solution 6 in the lower part of the heat storage tank 8 is sent to the refrigerator 1 by the water circulation pump 10 to form a cycle.

Further, FIG. 13 shows, for example, actual fairness 4-381.
It is a block diagram which shows the 2nd conventional ice heat storage apparatus of the 78th publication. In the figure, reference numeral 1 denotes a refrigerator, which includes a compressor 2, a condenser 3, a first flow rate control valve 4, and a first evaporator 5 as main components. 6 is an aqueous solution, 7 is an aqueous solution 6
Sherbet-like ice floating on the surface, and 8 is a heat storage tank for storing the aqueous solution 6 and the sherbet-like ice 7. 10 is an aqueous solution 6
Water circulation pump for circulating water, 11 is one of the heat storage tanks 8
, A first water circulation pump 10 and a first evaporator 5 are sequentially connected to guide the aqueous solution 6 cooled by the first evaporator 5 to the heat storage tank 8, 12b is a heat load, 13b
Is the second for sending the aqueous solution 6 stored in the heat storage tank 8 to the heat load 12b.
One of the water circulation pump, 14b is connected to the heat storage tank 8, and the second
This is a second water circulation path in which the water circulation pump 13b and the heat load 12b are sequentially connected, and the aqueous solution 6 cooled by the refrigerator 1 and stored in the heat storage tank 8 is guided to the heat load 12b. Further, 15b is a second evaporator that is installed in the heat storage tank 8 and cools the aqueous solution 6 stored in the heat storage tank 8, 16 is ice block-like ice generated on the outer periphery of the second evaporator, and 17b is a second evaporator. A second flow control valve for controlling the amount of the refrigerant flowing through 15b, and 18b is provided with one of the condenser 3 and the first
Is a refrigerant bypass flow path connected between the flow rate control valve 4, the second flow rate control valve 17b and the second evaporator 15b are sequentially connected, and the other is connected between the first evaporator 5 and the compressor 2; The second evaporator 15b and the second flow control valve 17b are connected to the first evaporator 5
And the first flow control valve 4 are connected in parallel.

Next, the operation will be described. The aqueous solution 6 supercooled to a few degrees below the freezing point (about −2 ° C.) by the first evaporator 5 of the refrigerator 1 is guided to the heat storage tank 8 through the first water circulation path 11 and is stored in the heat storage tank 8. The supercooled state is broken to become sherbet-shaped ice 7 corresponding to the amount of supercooled heat. The sorbet-shaped ice 7 flows into the heat storage tank 8 together with the remaining aqueous solution 6 that has not turned into ice, and the freezing point temperature 0 is set in the heat storage tank 8.
Float above the aqueous solution 6 at 0 ° C. The aqueous solution 6 in the lower part of the heat storage tank 8 is sent to the refrigerator 1 by the first water circulation pump 10 to form a cycle. At the same time, the aqueous solution 6 in the heat storage tank 8 is cooled by the second evaporator 15b, and the second evaporator 1b
Ice block ice 16 is generated on the outer periphery of 5b.

[0006]

The conventional ice heat storage device is configured as described above, and in the first conventional ice heat storage device, all the ice stored in the heat storage tank is generated from the supercooled water. It's ice. Since this ice is sherbet-like ice containing a large amount of water between the ice particles, (1) the amount of ice stored in the heat storage tank is small. As a result, a large heat storage tank is required to store the amount of heat corresponding to the heat load. (2) In order to solve the above problems, if ice water mixing means such as a stirrer is installed in the heat storage tank and the ice and the aqueous solution in the heat storage tank are stirred to try to make the ice concentration uniform throughout the heat storage tank, A large amount of dust and fine ice flow into the evaporator that supercools the aqueous solution and breaks the supercooling, freezing the flow path or clogging the ice removal device such as a filter that prevents the inflow of dust and ice. And so on. (3) Ice water, which is a mixture of sherbet-like ice and an aqueous solution, has very good fluidity, so ice water can be sent to a heat load and a large latent heat of melting of ice can be used, so that the power required for the pump is greatly increased. It can be reduced. However, in the conventional device, in order to send the ice water from the heat storage tank to the heat load, it is necessary to install an ice water mixing means such as a stirrer that stirs the ice and the aqueous solution in the heat storage tank. Occurs. There were drawbacks such as.

In the second conventional ice heat storage device, sherbet-like ice and ice block ice coexist in the heat storage tank, and the sherbet ice and ice block ice generated on the outer periphery of the second evaporator. As a result, (1) sherbet-like ice rises like a mountain above the ice block-like ice, and large ice blocks form in the aqueous solution, which makes it impossible to store the ice uniformly in the heat storage tank. Therefore, a large heat storage tank is required to store the amount of heat corresponding to the heat load. (2) Sherbet-shaped ice is very fine and melts more easily than ice-massed ice, so it has very good followability to heat load. However, the ice heat storage device does not have this advantage due to the reason (1) above. The followability is poor. (3) Since the ice stored in the heat storage tank becomes a hard mass, ice water cannot be easily sent to the heat load, so that the second water circulation pump requires a large amount of power. There were drawbacks such as.

The present invention has been made to solve the above problems, and (1) the heat storage tank is small. (2) Good followability to changes in the amount of heat used under heat load. (3) Pump power can be reduced by sending ice load and an aqueous solution mixed with the heat load. (4) The aqueous solution can be stably supercooled. An object is to obtain an ice heat storage device that can realize the above.

[0009]

An ice heat storage device according to claim 1 of the present invention is a refrigerator having a first evaporator and a second evaporator, water supercooled by the first evaporator, or added to water. Supercooling releasing means for releasing supercooling of the aqueous solution containing the substances to generate sherbet-like ice, a first heat storage tank for storing the sherbet-like ice, and a first evaporator for water or aqueous solution in the first heat storage tank. First water circulation pump to feed and circulate to
A second water circulation pump that sends water or an aqueous solution in a heat storage tank or ice water mixed with sherbet-like ice to a heat load and circulates it, and arranges a second evaporator in the tank, and an ice block that forms on the outer periphery of the second evaporator Second heat storage tank for storing ice-like ice, and a communication pipe connecting the first heat storage tank and the second heat storage tank, the second heat storage tank, the first water circulation pump, the first evaporator, the first heat storage tank, the communication pipe The water or aqueous solution or the ice water circulates in the order of the first water circulation path through which the water or aqueous solution circulates, the first heat storage tank, the second water circulation pump, the heat load, the second heat storage tank, and the communication pipe. The second water circulation path is configured.

The ice heat storage device according to claim 2 of the present invention is provided with a control means for controlling the flow rate of the refrigerant flowing through the first evaporator and the flow rate of the refrigerant flowing through the second evaporator.

According to a third aspect of the present invention, there is provided an ice heat storage device, which has an evaporator and cools an antifreeze liquid that does not solidify at least 0 ° C., and the antifreeze liquid cooled by the refrigerator and water or water. A supercooled water generation heat exchanger that heat-exchanges an aqueous solution containing an additive to supercool the water or the aqueous solution, heats the antifreeze solution cooled by the refrigerator, and water or an aqueous solution containing the additive added to the water. An ice block ice generation heat exchanger for exchanging to generate ice block ice, the supercooled water generation heat exchanger and an antifreeze circulation pump for sending the antifreeze liquid to the ice block ice generation heat exchanger, the supercooled water Alternatively, a supercooling releasing means for releasing supercooling of the aqueous solution to generate sherbet-like ice, a first heat storage tank for storing the sherbet-like ice, and water or an aqueous solution in the first heat storage tank for the supercooled water generation heat exchange vessel The first water circulation pump for feeding circulation,
A second water circulation pump for sending water or an aqueous solution in the first heat storage tank or ice water mixed with sherbet-like ice to a heat load to circulate it, and arranging the ice-lumped ice-generating heat exchanger in the tank,
The evaporator, the antifreeze circulation pump, the second heat storage tank for storing the ice-lump-like ice generated on the outer circumference of the ice-lump-shaped ice generation heat exchanger, and the communication pipe connecting the first heat storage tank and the second heat storage tank, An antifreeze liquid circulation path through which the above antifreeze liquid circulates in the order of an ice block ice formation heat exchanger and a supercooling water generation heat exchanger, a second heat storage tank, a first water circulation pump, a supercooling water generation heat exchanger, and a first heat storage tank. First, the water or aqueous solution is circulated in the order of the communication pipe
Water circulation path, first heat storage tank, second water circulation pump, heat load,
A second heat storage tank and a communication pipe constitute a second water circulation path in which the water or the aqueous solution or the ice water is circulated in this order.

According to a fourth aspect of the present invention, the ice heat storage device is provided with a control means for controlling the flow rate of the antifreeze liquid flowing through the ice block ice generating heat exchanger and the flow rate of the antifreeze liquid flowing through the supercooled water generating heat exchanger. It is a thing.

According to a fifth aspect of the present invention, there is provided the ice heat storage device, wherein the first heat storage tank is provided with ice water mixing means for mixing the sherbet-shaped ice in the first heat storage tank with water or an aqueous solution. .

According to a sixth aspect of the present invention, there is provided an ice heat storage device, wherein the second water circulation path is provided with a flow path through which water or an aqueous solution is fed from the heat load to the first heat storage tank, and the first heat storage is carried out from the heat load. A flow path switching means is provided for switching between a flow path of water supplied to the tank and a flow path of water supplied from the heat load to the second heat storage tank.

According to a seventh aspect of the present invention, in the ice heat storage device, the first water circulation path has a flow path through which water or an aqueous solution is fed from the first evaporator or the supercooled water generation heat exchanger to the second heat storage tank. A flow path for providing water to the second heat storage tank from the first evaporator or supercooling water generation heat exchanger and a flow of water to be supplied from the first evaporator or supercooling water generation heat exchanger to the first heat storage tank A flow path switching means for switching between the path and the path is provided.

In the ice heat storage device according to the eighth aspect of the present invention, the first water circulation path has a flow path through which water or an aqueous solution is sent from the first heat storage tank to the first evaporator or the supercooled water generation heat exchanger. A flow path for providing water from the first heat storage tank to the first evaporator or the supercooling water generation heat exchanger, and a flow for supplying water from the second heat storage tank to the first evaporator or the supercooling water generation heat exchanger A flow path switching means for switching between the path and the path is provided.

According to a ninth aspect of the present invention, there is provided an ice heat storage device according to the eighth aspect, wherein the second water circulation passage has a flow path through which water or an aqueous solution is fed from a heat load to the first heat storage tank. Along with being provided, a flow passage switching means is provided for switching between a flow passage from the heat load to the first heat storage tank and a flow passage from the heat load to the second heat storage tank.

[0018]

In the ice heat storage device according to the first aspect of the present invention, in the first heat storage tank, the sorbet generated by supercooling the water or the aqueous solution by the first evaporator and releasing the supercooling of the water or the aqueous solution by the supercooling releasing means. Store ice cubes. In addition, the ice cube-shaped ice generated on the outer periphery of the second evaporator is stored in the second heat storage tank. Therefore, (1) the sherbet-shaped ice stored in the first heat storage tank does not form a large lump and the fluidity can be maintained. Further, the sherbet-like ice has a small ice particle size, and therefore has a good followability to a heat load. (2) Since sherbet-shaped ice can be uniformly stored in the first heat storage tank, and ice block ice can be stored in the second heat storage tank at a higher ice filling rate than that of the sherbet-shaped ice.
The heat storage tank can be miniaturized. (3) In order to cool the water or the aqueous solution whose ice block-like ice stored in the second heat storage tank is sent from the first heat storage tank to the heat load by the second water circulation pump and exchanges heat to raise the temperature to 0 ° C. or higher. To use. Therefore, it goes without saying that the second heat storage tank does not require a device for sending ice water to a heat load, for example, an ice water mixing device such as a stirrer for mixing sherbet-shaped ice with water or an aqueous solution. (4) The ice block-like ice stored in the second heat storage tank has the effect of capturing fine ice and dust, and the water sent from the second heat storage tank to the evaporator and supercooled contains dust and ice. Or, the supercooled water that was not released does not mix. Alternatively, even if an ice removing device such as a filter is provided in the flow path from the second heat storage tank to the evaporator to prevent the inflow of dust and ice, clogging does not occur. As a result, it is possible to stably supercool the water or the aqueous solution in the evaporator, continuously generate sherbet-like ice, and operate the refrigerator with high efficiency.

In the ice heat storage device according to the second aspect, the flow rate of the refrigerant in the first and second evaporators can be controlled to stably supercool the water. Even if the supercooling is broken in the evaporator and the flow path is frozen, the refrigerant is liquefied by the first evaporator and gasified by the second evaporator, so that the flow path is frozen and the flow path is blocked. While heating and melting the ice cubes, it is possible to store the ice blocks in the second heat storage tank, and it is possible to operate the refrigerator with high efficiency.

In the ice heat storage device according to the third aspect, the antifreeze liquid cooled by the refrigerator is sent to the ice block-like ice formation heat exchanger and the supercooled water generation heat exchanger by the antifreeze liquid circulation pump, and the first heat storage tank stores the excess heat. Supercool water or aqueous solution with a cooling water generation heat exchanger,
To store sherbet-like ice generated by removing supercooling of water or an aqueous solution by the supercooling releasing means, and at the same time store ice-like ice formed in the outer periphery of the ice-lumped ice-generating heat exchanger in the second heat storage tank. As a result, the same device as the ice heat storage device according to the first aspect can be obtained.

According to the fourth aspect of the present invention, in the ice heat storage device, the flow rate of the antifreezing liquid flowing through the ice block ice generating heat exchanger and the flow rate of the antifreezing liquid flowing through the supercooled water generating heat exchanger are controlled to stably supercool the water. it can.

In the ice heat storage device according to the fifth aspect, since the ice water mixing means is provided in the first heat storage tank, the ice water in which the sherbet-like ice and water or the aqueous solution are mixed can be sent to the heat load, and the water circulation pump. The power required for can be greatly reduced. Further, dust and fine ice generated in the aqueous solution by stirring the ice in the first heat storage tank with the aqueous solution by the ice water mixing means are captured by the ice block ice stored in the second heat storage tank. Similarly, the aqueous solution can be stably supercooled, and the refrigerator can be operated with high efficiency.

In the ice heat storage device according to the sixth aspect, when the temperature of the water or aqueous solution at the heat load outlet is 0 ° C. or lower, the flow path is switched to the water flow to the first heat storage tank, and when the temperature exceeds 0 ° C. 2 It is possible to switch to a flow path for supplying water to the heat storage tank. As a result, the sherbet-shaped ice stored in the first heat storage tank can be used without melting, the ice water can be continuously sent to the heat load for a long time, and the flow rate can be reduced.
The power required for the water circulation pump can be reduced. Furthermore, the second
Since the temperature of the water or aqueous solution stored in the heat storage tank can be made higher than the temperature of the water or aqueous solution stored in the first heat storage tank, it is possible to send the water or aqueous solution of high temperature to the evaporator, and operate the refrigerator with high efficiency. Can be done.

In the ice heat storage device according to the seventh aspect, when the supercooled water or the cold water cooled by the first evaporator or the supercooled water generation heat exchanger has a temperature exceeding 0 ° C., the water is sent to the second heat storage tank. If the temperature is 0 ° C. or lower, it is possible to switch to the flow path for supplying water to the first heat storage tank. As a result, the same device as the ice heat storage device according to claim 6 is obtained.

In the ice heat storage device according to the eighth aspect, the temperatures of the water or the aqueous solution stored in the second heat storage tank and the water or the aqueous solution stored in the first heat storage tank are compared with each other, and the high temperature water or the aqueous solution is stored. The flow path can be switched to feed water to the first evaporator or the supercooled water generation heat exchanger. This allows highly efficient operation of the refrigerator.

In the ice heat storage device according to the ninth aspect, in addition to the operation of the eighth aspect, when the temperature of the water or the aqueous solution stored in the second heat storage tank exceeds a predetermined temperature, the water or the aqueous solution is stored as the first heat storage. Water can be sent from the tank to the evaporator, and the second heat storage tank can be separated from the water circulation path.

[0027]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 is a configuration diagram showing an ice heat storage device according to a first embodiment of the present invention. In the figure, 15a is a second evaporator provided between a compressor 2 and a first evaporator 5, and 20 is a second evaporator. 15a
Is provided in the tank, and the second heat storage tank 21 for storing the ice-lump-shaped ice 16 generated on the outer periphery of the second evaporator 15a, one of which is the first
A communication pipe connected to the heat storage tank 8 and the other to the second heat storage tank 20, 11 denotes the second heat storage tank 20, the first water circulation pump 10,
A first water circulation passage 22 configured to circulate in the order of the first evaporator 5, the first heat storage tank 8, the communication pipe 21, and the second heat storage tank 20,
Is an ice water mixing means for mixing the sherbet-like ice 7 with water or the aqueous solution 6, 12a is a heat load, 13a is this heat load 1
A second water circulation pump that sends ice water obtained by mixing the water or the aqueous solution 6 mixed by the ice water mixing means 22 and the sherbet-shaped ice 7 to 2a, 14a is the first heat storage tank 8, and the second water circulation pump 13
a, heat load 12a, second heat storage tank 20, communication pipe 21, first
It is a second water circulation passage configured to circulate in the order of the heat storage tank 8. The other configurations are the same as those in the first conventional example, and the description thereof will be omitted.

Next, the operation will be described. Second heat storage tank 2
The water or aqueous solution 6 stored in 0 is supercooled to several degrees below the freezing point (about −2 to −5 ° C.) in the first evaporator 5 of the refrigerator 1, and passes through the first water circulation path 11 to generate the first heat storage. The supercooled state is broken by an ice block having a predetermined size, which is the supercooling releasing means 9 provided on the upper portion of the tank 8, and the sherbet-shaped ice 7 corresponding to the supercooling heat amount is obtained. This sherbet ice 7
The first heat storage tank 8 together with the remaining aqueous solution 6 that did not become ice
And floats above the aqueous solution 6 having a freezing point temperature of 0 ° C. in the first heat storage tank 8. The aqueous solution 6 in the lower part of the first heat storage tank 8 passes through the communication pipe 21 and flows into the second heat storage tank 20, and the second evaporator 1
It is cooled in 5a and becomes ice 16 in the form of ice blocks. Ice block ice 1
The remaining aqueous solution 6 that did not become 6 is sent to the first evaporator 5 of the refrigerator 1 by the first water circulation pump 10 to form a cycle.

On the other hand, the sherbet-shaped ice 7 stored in the first heat storage tank 8 is mixed with water or an aqueous solution 6 by the ice water mixing means 22.
Is mixed with and sent to the heat load 12a to exchange heat with the air in the room or the water for cooling the room, and the sherbet ice 7 is melted and sent to the second heat storage tank 20 through the second water circulation path 14a. Then, after being cooled by the second evaporator 15a installed in the second heat storage tank 20, the first heat storage tank 8 passes through the communication pipe 21.
Returned to. This water is mixed with the sherbet-shaped ice 7 again by the ice water mixing means 22, and is sent to the heat load 12a by the second water circulation pump 13a to form a cycle.

The operation of the refrigerator 1 will be described. The gas refrigerant discharged from the compressor 2 is cooled and liquefied by the condenser 3 and depressurized to a low pressure by the flow control valve 4. This low-pressure refrigerant flows into the first evaporator 5 and exchanges heat with the water or aqueous solution 6 sent from the second heat storage tank 20 by the first water circulation pump 10,
Further, it flows into the second evaporator 15a, exchanges heat with the water or the aqueous solution 6 stored in the second heat storage tank 20, becomes a gas state, and is sucked into the compressor 2 again.

As described above, in this embodiment, in the first heat storage tank 8, the water or aqueous solution 6 is supercooled by the first evaporator 5, and the water or aqueous solution 6 is supercooled by the supercooling releasing means 9. It is possible to store the sherbet-shaped ice 7 generated by releasing it and at the same time store the ice block-shaped ice 16 generated on the outer periphery of the second evaporator 15a in the second heat storage tank 20. Therefore, the first
Since the sherbet-shaped ice 7 stored in the heat storage tank 8 does not form a large lump and can maintain fluidity, the sherbet-shaped ice 7 can be stored uniformly in the first heat storage tank 8. At the same time, the ice block-shaped ice 16 can be stored in the second heat storage tank 20 at an ice filling rate higher than that of the sherbet-shaped ice 7, so that the first heat storage tank 8 can be downsized. Furthermore, since the sherbet-shaped ice 7 has a small ice grain size, it has good followability to heat load. In addition, ice water mixing means 22 such as a stirrer
Since the water or the aqueous solution 6 and the sherbet-shaped ice 7 can be easily mixed and sent to the heat load 12a, the second water circulation pump 1
The power required for 3a can be greatly reduced. Further, the ice block ice 16 stored in the second heat storage tank 20 is sent from the first heat storage tank 8 to the heat load 12a and exchanges heat to cool the water or the aqueous solution 6 whose temperature has risen to 0 ° C. or higher. Available.
Therefore, as a matter of course, the second heat storage tank 20 does not require an ice water mixing means such as a stirrer for mixing the sherbet-shaped ice 7 with water or an aqueous solution. On the other hand, even if the ice water mixing means is installed in the first heat storage tank 8 and the ice and the aqueous solution in the first heat storage tank are stirred, the ice block-shaped ice 1 stored in the second heat storage tank 20
Since 6 has the effect of capturing fine ice, the second
The water sent from the heat storage tank 20 to the first evaporator 5 and supercooled does not contain dust, ice, or uncooled supercooled water. Even if an ice removing device such as a filter is provided in the flow path from the second heat storage tank 20 to the first evaporator 5 to completely prevent the inflow of dust and ice, clogging does not occur. As a result, the first evaporator 5 can stably supercool the water or the aqueous solution 6, continuously generate sherbet-like ice 7, and operate the refrigerator 1 with high efficiency.

In the above embodiment, the ice water mixing means 22
In the above, a device for mixing the sherbet-shaped ice 7 with water or the aqueous solution 6 to form ice water and sending it to the heat load 12a has been described.
A device that sends only the water or the aqueous solution 6 stored in the first heat storage tank 8 to the heat load 12a without using the ice water mixing means 22 has the same effect except that the power required for the second water circulation pump 13a is reduced. Obtainable.

Further, in the above-mentioned embodiment, the device for producing a certain amount of sherbet-shaped ice 7 and ice block-shaped ice 16 in the first evaporator 5 and the second evaporator 15a has been described, but the second evaporator 15a is described. In addition to the effect of the above-mentioned embodiment by providing a temperature sensor at the outlet of the device and controlling the temperature of the outlet, that is, the degree of superheat of the refrigerant, a sherbet-like ice to be stored for sending to the heat load 12a. It is possible to adjust only the amount of ice blocks 16 in accordance with the heat load required by the heat load 12a while storing 7 in a predetermined amount.

Further, by providing the capacity control means of the refrigerator 1, for example, the frequency control means of the compressor 2, etc., the heat load 12a can be stored while storing a predetermined amount of sherbet-like ice 7 to be stored for sending to the heat load 12a. It is possible to adjust only the amount of ice cube-shaped ice 16 according to the required heat load.

In the above embodiment, the first evaporator 5 and the second evaporator 5
Although the evaporators 15a connected in series are shown, as in the second conventional example, a refrigerator having a configuration in which they are connected in parallel is
As in the present embodiment, the second evaporator 15a in which the second evaporator 15a is arranged in the tank is used.
A heat storage tank 20 is provided, and a second heat storage tank, a first water circulation pump, a first evaporator, a first heat storage tank, and a communication pipe in which water or an aqueous solution circulates in that order, a first heat storage tank, and a second heat storage tank. A water circulation pump, a heat load, a second heat storage tank, and a communication pipe may be arranged in this order to form a second water circulation path through which water or an aqueous solution or ice water circulates.

Example 2. Second Embodiment FIG. 2 is a configuration diagram showing an ice heat storage device according to a second embodiment of the present invention. Although the device in which the refrigerant having substantially the same pressure flows into the first evaporator 5 and the second evaporator 15a has been described in the first embodiment, the ice heat storage device of the second embodiment includes the first evaporator 5 and the second evaporator. A second flow rate control valve 30 is provided between the evaporators 15a to control the flow rate of the refrigerant flowing through the first evaporator 5 and the flow rate of the refrigerant flowing through the second evaporator 15a. The other configurations are similar to those of the first embodiment, and the description thereof is omitted.

Next, the operation will be described. The operation of the ice water in the second water circulation passage 14a is the same as that of the first embodiment, but the operation of the water or the aqueous solution in the refrigerator 1 and the first water circulation passage 11 is different, so the refrigerator 1 and the first water circulation passage 11 are different. The operation of the water or the aqueous solution 6 therein will be mainly described.

The ice heat storage device has a first operation mode in which the water or aqueous solution 6 in the first evaporator 5 is stably cooled to a supercooled state, and a subcooling in the first evaporator 5. Is broken and the flow path in the first evaporator 5 is frozen, there is a second operation mode. Hereinafter, each operation mode will be described.

In the first operation mode (stable operation of producing supercooled water), as shown in the pressure-enthalpy diagram of FIG. 3, a refrigerant that heat-exchanges with the water or aqueous solution 6 while being gasified in the first evaporator 5. The pressure (the pressure between A and B in the figure) is controlled by the second flow control valve 30 so that the water or the aqueous solution 6 can be stably supercooled. The other operations are similar to those of the first embodiment, and the description thereof will be omitted.

In the second operation mode (operation during freezing),
The first flow rate control valve 4 is fully opened, and as shown in the pressure-enthalpy diagram of FIG. 4, the refrigerant flowing out from the condenser 3 (A ^{* in the} figure ⁾
The refrigerant at the point) flows into the first evaporator 5 without being decompressed (point A ^* in the figure), and liquefies while heating the ice blocking the flow path in the first evaporator 5 (see the figure). (B ^* point in the middle), and second
The pressure is reduced to a low pressure by the flow control valve 30 (C in the figure).
^* Point). Then, the low-pressure refrigerant becomes the second evaporator 1
5a (C ^* point in the figure) and exchanges heat with the water or the aqueous solution 6 stored in the second heat storage tank 20 to become a gas state (D ^* point in the figure), and enters the compressor 2. Inhaled. Further, the water circulation pump 10 is in a stopped state. The operation of the ice water in the second water circulation path is the same as that of the first embodiment, and the description thereof is omitted.

In the ice heat storage device thus configured, the pressure of the refrigerant in the first evaporator 5 can be controlled by the second flow rate control valve 30 to a pressure at which water can be stably supercooled, and at the same time, the second evaporator 15 can be controlled.
Since the pressure of a can be controlled to a pressure at which the refrigerator 1 can be efficiently operated, in addition to the effect of the first embodiment, the sherbet-shaped ice 7 can be generated more stably. Further, even when the subcooling is broken in the first evaporator 5 and the flow path is frozen, the first flow control valve 4 is configured so that the refrigerant is liquefied in the first evaporator 5 and gasified in the second evaporator 15a. By controlling the second flow rate control valve 30 and the second flow control valve 30, the ice block ice 16 can be stored in the second heat storage tank 20 while heating and melting the ice that has frozen and blocked the flow path. 1 operation can be performed.

In the above embodiment, the second flow control valve 30 is used.
Although the device for providing the above has been described, the same effect can be obtained by providing a pressure reducing means such as a capillary tube instead of the second flow rate control valve 30.

Example 3. In the second embodiment, when the subcooling is broken in the first evaporator 5 and the flow path is frozen, the condenser 3
The device for heating the ice that has liquefied the refrigerant in the first evaporator 5 and blocked the flow path has been described. However, in the ice heat storage device of the third embodiment, one is compressed as shown in the configuration diagram of FIG. Machine 2
And a condenser 3 and the other is connected between the first flow rate control valve 4 and the first evaporator 5, and a shutoff valve 32 is provided in the middle of the refrigerant bypass passage 31. It has a different configuration. The other configurations are the same as those in the second embodiment, and the description thereof is omitted.

Next, the operation will be described. The operations of the ice water in the second water circulation path 14a and the water or the aqueous solution in the first water circulation path 11 are exactly the same as those in the second embodiment, but the operation of the refrigerator 1 is different, so that the operation of the refrigerator 1 will be mainly described. Explained.

This ice heat storage device has a first operation mode in which the water or aqueous solution 6 in the first evaporator 5 is stably cooled to a supercooled state and a subcooling in the first evaporator 5. Is broken and the flow path in the first evaporator 5 is frozen, there is a second operation mode. Hereinafter, each operation mode will be described.

The first operation mode (stable supercooling water generation operation) is the same as that of the second embodiment except that the on-off valve 32 is closed.

In the second operation mode (operation during freezing),
The first flow rate control valve 4 is fully closed, the on-off valve 32 provided in the middle of the refrigerant bypass passage 31 is fully opened, and the refrigerant flowing out of the compressor 2 flows into the first evaporator 5 as a high-temperature and high-pressure refrigerant gas. Then, the ice blocking the flow path in the first evaporator 5 is liquefied while being heated, and the pressure is reduced to a low pressure by the second flow rate control valve 30. Then, the low-pressure refrigerant flows into the second evaporator 15 a, exchanges heat with the water or the aqueous solution 6 stored in the second heat storage tank 20, becomes a gas state, and is sucked into the compressor 2. .
The operations of the ice water in the second water circulation path and the water or the aqueous solution in the water circulation path are the same as those in the first embodiment, and the description thereof is omitted.

In addition to the effect of the second embodiment, the ice heat storage device configured as described above more efficiently heats and melts the ice that has blocked the frozen flow passage, while the second heat storage tank 20 holds the ice block-shaped ice. Can store 16.

Further, in the above embodiment, the second flow control valve 30
Although the device for providing the above has been described, the same effect can be obtained by providing a pressure reducing means such as a capillary tube instead of the second flow rate control valve 30.

Example 4. FIG. 6 is a configuration diagram showing an ice heat storage device according to a fourth embodiment of the present invention. In the figure, 1 is a refrigerator for cooling an antifreeze liquid that does not solidify at 0 ° C., 40 is an antifreeze liquid and water cooled by the refrigerator 1. Alternatively, a supercooled water generation heat exchanger that heat-exchanges the aqueous solution 6 to supercool the water or the aqueous solution, 41 is an antifreeze circulation pump that sends an antifreeze solution to the supercooled water heat exchanger 40, and 42 is the second heat storage tank 20.
Is provided in the tank of No. 3, and an ice block-shaped ice generation heat exchanger that heat-exchanges the antifreeze liquid with water or aqueous solution 6 to generate ice block-shaped ice on the outer periphery, 43 is a supercooled water generation heat exchanger 40, and an evaporator 5 , An antifreeze liquid circulation pump 41, and an ice block-like ice forming heat exchanger 42 in this order. The other configurations are similar to those of the first embodiment, and the description thereof is omitted.

Next, the operation will be described. Since the operation of the refrigerator 1 is the same as that of the first conventional example, description thereof will be omitted. Also,
Operation of water in the first water circuit 11, and second water circuit 1
Since the operation of the ice water in 4a is the same as that of the first embodiment, the operation of the antifreeze liquid in the antifreeze liquid circulation path 43 will be described.

In this ice heat storage device, the evaporator 5 of the refrigerator 1
The antifreeze liquid is cooled with the antifreeze liquid circulation pump 4
1, the ice lump ice generation heat exchanger 42 and the supercooled water generation heat exchanger 40 provided in the second heat storage tank 20 are circulated in this order, and ice lump ice is formed around the ice lump ice generation heat exchanger 42. 16 is generated, and the water or aqueous solution 7 is cooled to supercool in the supercooled water generation heat exchanger 40. The ice heat storage device configured in this manner also has the same effects as those of the first embodiment.

In this embodiment, the ice lump-like ice forming heat exchanger 42 and the supercooled water forming heat exchanger 40 are connected in series, but they may be connected in parallel to each other and the refrigerator 1 may be used. The antifreeze liquid is cooled by the evaporator 5, the antifreeze liquid is sent by the antifreeze liquid circulation pump 41 to the ice block-like ice formation heat exchanger 42, and the antifreeze circulation passage is connected to the supercooled water formation heat exchanger 40 connected in parallel. It may be configured.

Example 5. FIG. 7 is a configuration diagram showing an ice heat storage device according to a fifth embodiment of the present invention. In the above-described fourth embodiment, the device in which the same flow rate of the antifreeze liquid flows into the supercooled water generation heat exchanger 40 and the ice block ice generation heat exchanger 42 has been described, but the ice heat storage device of the fifth embodiment has the configuration of FIG. 7. As shown in the figure, one is connected between the ice block-like ice generation heat exchanger 42 and the supercooled water generation heat exchanger 40, and the other is connected between the supercooled water generation heat exchanger 40 and the evaporator 5. Antifreeze bypass flow path 45
And an antifreeze liquid flow control valve 46 for adjusting the flow amount of the antifreeze liquid flowing through the antifreeze liquid bypass passage 45, and the flow rate of the antifreeze liquid flowing through the ice block ice generation heat exchanger 42 and the antifreeze liquid flowing through the supercooling water generation heat exchanger 40. Control the flow rate of. The other configurations are similar to those in the fourth embodiment, and the description thereof is omitted.

In the ice heat storage device configured as described above, the flow rate of the antifreeze liquid flowing into the supercooled water generation heat exchanger 40 is controlled by the antifreeze liquid flow control valve 46, and the water or the aqueous solution 6 can be stably supercooled, and at the same time. In the ice block ice generation heat exchanger 42, the flow rate of the refrigerator 1 can be controlled so that the refrigerator 1 can be efficiently operated. Therefore, in addition to the effect of the fourth embodiment, the sherbet-like ice 7 can be stably generated and the refrigerator is highly efficient. 1 operation can be performed.

Example 6. FIG. 8 is a configuration diagram showing an ice heat storage device according to a sixth embodiment of the present invention. In this embodiment,
The water or the aqueous solution 6 has a heat load 12 on the second water circulation path 14a.
A flow path for supplying water from a to the first heat storage tank 8 is added, and a flow path for supplying water from the heat load 12a to the first heat storage tank 8 and a flow path for supplying water from the heat load 12a to the second heat storage tank 20. The flow path switching means 50 for switching between is provided. In addition,
Other configurations are similar to those of the first embodiment.

Next, the operation will be described. This ice heat storage device includes (1) water or aqueous solution 6 at the outlet of the heat load 12a.
There is a first operation mode in which the temperature is 0 ° C. or less, and (2) a second operation mode in which the temperature of the water or aqueous solution 6 at the outlet of the heat load 12a exceeds 0 ° C. Hereinafter, each operation mode will be described.

In the first operation mode, the flow path switching means 50 is switched to the flow path for supplying water from the heat load 12a to the first heat storage tank 8. The sherbet-shaped ice 7 stored in the first heat storage tank 8 is mixed with water or the aqueous solution 6 by the ice water mixing means 22 and sent to the heat load 12a by the second water circulation pump 13a to cool the indoor air or the water for cooling the indoor air. Heat exchange with
It is sent to the heat storage tank 8. This water is stored in the first heat storage tank 8, mixed again with the sherbet-shaped ice 7, and sent to the heat load 5 to form a cycle. The operation of the refrigerator 1 and the first water circulation pump 10 is the same as that of the first embodiment, and the description thereof is omitted.

In the second operation mode, the flow path switching means 50 is switched to the flow path for supplying water to the second heat storage tank 20. The sherbet-shaped ice 7 stored in the first heat storage tank 8 is mixed with water or the aqueous solution 6 and sent to the heat load 12a by the second water circulation pump 13a to exchange heat with room air or water for cooling the room air. As a result, water has a temperature of 0 ° C. or higher, for example, about 12 ° C. This water is sent to the second heat storage tank 20 through the flow path switching means 50, and is cooled to about 0 ° C. while melting the ice block ice 16 stored in the second heat storage tank 20 and then the second heat storage tank 20. Stored in. Then, a part of the water or the aqueous solution 6 passes through the communication pipe 21 and is stored in the first heat storage tank 8. The operation of the refrigerator 1 and the first water circulation pump 10 is the same as that of the first embodiment, and the description thereof is omitted.

As described above, in this embodiment, in addition to the effects of the first embodiment, the water or aqueous solution 6 after heat exchange with the heat load 12a according to the temperature of the water or aqueous solution 6 at the outlet of the heat load 12a is performed. Can be switched to either the flow path leading to the first heat storage tank 8 or the flow path reaching the second heat storage tank 20, and the sherbet-shaped ice 7 stored for sending to the heat load 12a is subjected to the heat load. It can be efficiently used without being melted with the water or the aqueous solution 6 from 12a, the ice water can be continuously sent for a long time, and the heat load can be cooled with a small flow rate, so that the power required for the second water circulation pump 13a can be reduced. further,
The temperature of the water or the aqueous solution 6 stored in the second heat storage tank 20 can be higher than the temperature of the water or the aqueous solution 6 stored in the first heat storage tank 8, and the temperature of the water or the aqueous solution 6 sent to the refrigerator 1 is high, The refrigerator 1 can be operated efficiently.

Example 7. FIG. 9 is a configuration diagram showing an ice heat storage device according to a seventh embodiment of the present invention. In this embodiment,
In the first water circulation path 11, water or an aqueous solution 6 is added to the first evaporator 5
A flow path from the first heat storage tank 20 to the second heat storage tank 20 is added.
A flow path for sending water from the evaporator 5 to the second heat storage tank 20;
The flow path switching means 60 is provided to switch the flow path from the evaporator 5 to the water supplied to the first heat storage tank 8. In addition,
Other configurations are similar to those of the first embodiment.

Next, the operation will be described. This ice heat storage device includes (1) water or aqueous solution 6 at the outlet of the first evaporator 5.
There is a first operation mode in which the temperature is 0 ° C. or lower, and (2) a second operation mode when the temperature of the water or aqueous solution 6 at the outlet of the first evaporator 5 exceeds 0 ° C. Hereinafter, each operation mode will be described.

In the first operation mode, the flow path switching means 60 is switched to the flow path for feeding water from the first evaporator 5 to the first heat storage tank 8, and the supercooling canceling means 9 cancels the supercooling of the water or the aqueous solution 6. Then, sherbet-shaped ice 7 is generated. Sherbet-like ice 7 Water or aqueous solution 6
Flows into the second heat storage tank 20 through the communication pipe 20, and is again sent to the first evaporator 5 of the refrigerator 1 by the first water circulation pump 10 to form a cycle. The operations of the refrigerator 1, the second water circulation pump 15a, and the ice water mixing means 22 are the same as those in the first embodiment, and a description thereof will be omitted.

In the second operation mode, the flow passage switching means 60 is switched to the flow passage for supplying water to the second heat storage tank 20. The sherbet-shaped ice 7 stored in the first heat storage tank 8 is mixed with water or the aqueous solution 6 and sent to the heat load 12a by the second water circulation pump 13a to exchange heat with room air or water for cooling the room air. As a result, water has a temperature of 0 ° C. or higher, for example, about 12 ° C. This water is sent to the second heat storage tank 20, and is cooled to about 0 ° C. while melting the ice block ice 16 stored in the second heat storage tank 20 and stored in the second heat storage tank 20. Then, a part of the water or the aqueous solution 6 passes through the communication pipe 21 and is stored in the first heat storage tank 8. The operation of the refrigerator 1, the second water circulation pump 15a and the ice water mixing means 22 is the same as that of the first embodiment.
The explanation is omitted because it is the same as the above.

As described above, in this embodiment, in addition to the effect of the first embodiment, the water cooled by the first evaporator 5 is changed according to the temperature of the water or the aqueous solution 6 at the outlet of the first evaporator 5. Alternatively, since the flow path of the aqueous solution 6 can be switched to either the flow path to the first heat storage tank 8 or the flow path to the second heat storage tank 20, sherbet-like ice stored for sending to the heat load 12a. 7 is water or aqueous solution 6 from the first evaporator 5.
Since the ice water can be efficiently used without being melted and the ice water can be continuously sent for a long time to cool the heat load with a small flow rate, the power required for the second water circulation pump 13a can be reduced. Further, the temperature of the water or the aqueous solution 6 stored in the second heat storage tank 20 can be higher than the temperature of the water or the aqueous solution 6 stored in the first heat storage tank 8, and the temperature of the water or the aqueous solution 6 sent to the refrigerator 1 can be increased. It is high, and the refrigerator 1 can be operated efficiently.

Example 8. FIG. 10 is a configuration diagram showing an ice heat storage device according to Embodiment 8 of the present invention. In the present embodiment, the first water circulation passage 11 is provided with a bypass passage 71 through which the water or the aqueous solution 6 is fed from the first heat storage tank 8 to the first evaporator 5, and the first heat storage tank 8 is passed through the first evaporator. The flow path switching means 70 is provided for switching between the flow path for supplying water to the water tank 5 and the flow path for supplying water to the first evaporator 5 from the second heat storage tank 20. The other configurations are similar to those of the first embodiment.

Next, the operation will be described. In this ice heat storage device, (1) the first operation when the temperature of the water or the aqueous solution 6 stored in the second heat storage tank 20 is higher than the temperature of the water or the aqueous solution 6 stored in the first heat storage tank 8 Mode,
(2) There is a second operation mode in which the temperature of the water or the aqueous solution 6 stored in the second heat storage tank 20 is lower than the temperature of the water or the aqueous solution 6 stored in the heat storage tank 8. Hereinafter, each operation mode will be described.

In the first operation mode, the flow path switching means 70 is switched to the flow path 71 from the second heat storage tank 20 to the first evaporator 5 through the first water circulation pump 10. Since other operations are the same as those in the first embodiment, the description thereof will be omitted.

In the second operation mode, the flow passage switching means 70 is switched from the first heat storage tank 8 to the bypass flow passage 71 which passes through the first water circulation pump 10 and reaches the first evaporator 5. The water or the aqueous solution 6 stored in the first heat storage tank 8 passes through the bypass passage 71, is cooled by the first evaporator 5, and is then again returned to the first heat storage tank 6.
Water is sent to the heat storage tank 8. The other operations are the same as those in the first embodiment.
The explanation is omitted because it is the same as the above.

As described above, in this embodiment, in addition to the effects of the first embodiment, the water or aqueous solution 6 stored in the second heat storage tank 20 and the water or aqueous solution 6 stored in the first heat storage tank 8 are added. Compare the temperatures of water and water at higher temperatures 6
Since the water can be sent to one evaporator 5, the refrigerator can be operated efficiently.

Example 9. FIG. 11 is a configuration diagram showing an ice heat storage device according to Embodiment 8 of the present invention. In the present embodiment, as in the case of the sixth embodiment, a flow path through which the water or the aqueous solution 6 is sent from the heat load 12a to the first heat storage tank 8 is added to the second water circulation path 14a, and the first heat storage from the heat load 12a is added. A flow passage switching means 80 for switching between a flow passage for supplying water to the tank 8 and a flow passage for supplying water from the heat load 12a to the second heat storage tank 20 is provided, and like the eighth embodiment, the first water circulation passage 11 is provided with: A bypass flow path 81 is provided through which water or aqueous solution 6 is sent from the first heat storage tank 8 to the first evaporator 5, and a flow path through which water is sent from the first heat storage tank 8 to the first evaporator 5 and the second heat storage tank. The second flow path switching means 82 for switching the flow path from 20 to the water flow to the first evaporator 5 is provided. The other configurations are similar to those of the first embodiment.

Next, the operation will be described. In this ice heat storage device, (1) an upper limit temperature at which the temperature of the water or the aqueous solution 6 stored in the second heat storage tank 20 can be used, for example, 12 ° C.
The first operation mode in the following cases, and (2) the second heat storage tank 2
There is a second operating mode when the temperature of the water or aqueous solution 6 stored at 0 exceeds the upper limit temperature that can be used, for example 12 ° C. Hereinafter, each operation mode will be described.

In the first operation mode, the flow path switching means 80 is switched to the flow path from the heat load 12a to the second heat storage tank 20, and the second flow path switching means 82 is moved from the second heat storage tank 20 to the first water circulation pump. Switch to the flow path up to 10. Since other operations are the same as those in the first embodiment, the description thereof will be omitted.

In the second operation mode, the flow path switching means 80 is switched to the flow path from the heat load 12a to the first heat storage tank 8, and the second flow path switching means 82 is switched from the first heat storage tank 8 to the first water circulation pump. Switch to the bypass passage 81 up to 10. The water or aqueous solution 6 stored in the first heat storage tank 8 is
After being cooled by the first evaporator 5 through the bypass passage 81,
The water is again sent to the first heat storage tank 8 and is also sent to the heat load 12a by the second water circulation pump 13a. The operation of the refrigerator 1 is the same as that of the first embodiment, and a description thereof will be omitted.

As described above, in this embodiment, in addition to the effect of the first embodiment, the flow path of the water or the aqueous solution 6 is changed depending on the temperature of the water or the aqueous solution 6 stored in the second heat storage tank 20. , Water after switching to either the flow path from the first heat storage tank 8 to the first evaporator 5 or the flow path from the second heat storage tank 20 to the first evaporator 5 and further performing heat exchange with the heat load 12a Alternatively, since the flow path of the aqueous solution 6 can be switched to the flow path to the first heat storage tank 8 or the flow path to the second heat storage tank 20, the temperature of the water or the aqueous solution 6 stored in the second heat storage tank 20 is changed. When the temperature exceeds a predetermined temperature, the second heat storage tank 20 can be separated from the first water circulation path 11 and the second water circulation path, and the sherbet-shaped ice stored for sending to the heat load 12a is not melted, and the efficiency is improved. A sherbet-like ice 7 is often loaded with heat 12a It can be sent, thereby reducing the power required for the second water circulation pump 13a.

[0076]

As described above, according to the first aspect of the present invention, a refrigerator having a first evaporator and a second evaporator,
Supercooling releasing means for releasing supercooling of water supercooled by the first evaporator or an aqueous solution obtained by adding an additive to water to generate sherbet-like ice; a first heat storage tank for storing the sherbet-like ice; A first water circulation pump for sending and circulating water or an aqueous solution in the first heat storage tank to the first evaporator; water or an aqueous solution in the first heat storage tank, or ice water in which sherbet-like ice is mixed, for sending and circulating to a heat load; 2 water circulation pump, 2nd evaporator is arrange | positioned in a tank, the 2nd heat storage tank which stores the ice block-like ice produced in the outer periphery of a 2nd evaporator, and the communication pipe which connects a 1st heat storage tank and a 2nd heat storage tank And a first water circulation path in which the water or the aqueous solution circulates in the order of the second heat storage tank, the first water circulation pump, the first evaporator, the first heat storage tank, and the communication pipe, and the first heat storage. Tank, second water circulation pump, heat load, second Since the second water circulation path in which the water or the aqueous solution or the ice water is circulated in the order of the heat tank and the communication pipe is configured, it is possible to uniformly store fluidized sherbet-like ice in the first heat storage tank. As a result, a device having good followability with respect to heat load can be obtained. Further, the ice lump ice can be stored in the second heat storage tank at a higher ice filling rate than the sherbet-shaped ice, and the heat storage tank can be downsized. In addition, the ice block-like ice stored in the second heat storage tank has an effect of capturing fine ice, and the first evaporator can stably supercool the water or the aqueous solution, and can operate the refrigerator with high efficiency.

Further, according to the invention of claim 2, in the ice heat storage device of claim 1, the control means for controlling the flow rate of the refrigerant flowing through the first evaporator and the flow rate of the refrigerant flowing through the second evaporator. With the provision of, the sherbet-like ice can be generated more stably.

According to the third aspect of the present invention, a refrigerator having an evaporator for cooling an antifreeze liquid which does not solidify at least at 0 ° C., an antifreeze liquid cooled by the refrigerator, and water or an additive to water. A subcooled water generation heat exchanger that heat-exchanges the added aqueous solution to supercool water or the aqueous solution,
The antifreeze liquid cooled by the refrigerator and water or an aqueous solution obtained by adding an additive to water is heat-exchanged to generate ice-lump ice, and the ice-lump ice generation heat exchanger, the supercooled water generation heat exchanger, and the above An antifreeze liquid circulation pump that sends an antifreeze liquid to an ice block ice formation heat exchanger, a supercooling releasing means for releasing supercooling of supercooled water or an aqueous solution, and generating sherbet-like ice,
A first heat storage tank for storing the sherbet-like ice, a first water circulation pump for sending and circulating water or an aqueous solution in the first heat storage tank to the supercooled water generation heat exchanger, water or an aqueous solution in the first heat storage tank, or A second water circulation pump for sending ice water mixed with sherbet-like ice to a heat load to circulate the ice water, the ice-mass ice-generating heat exchanger is arranged in a tank, and the ice-mass ice-mass generated on the outer periphery of the ice-mass ice-generating heat exchanger Second heat storage tank for storing ice
In addition, the ice heat storage device is configured by a communication pipe that connects the first heat storage tank and the second heat storage tank, and the antifreeze liquid is formed in the order of the evaporator, the antifreeze liquid circulation pump, the ice lump ice formation heat exchanger, and the supercooled water generation heat exchanger. Circulating antifreeze liquid, second heat storage tank, first water circulation pump, supercooled water generation heat exchanger, first heat storage tank,
A first water circulation path in which water or an aqueous solution circulates in the order of a communication pipe, and a first heat storage tank, a second water circulation pump, a heat load, a second heat storage tank, a water or aqueous solution or an ice water circulates in the order of a communication tube. Since the two water circulation paths are configured, the same effect as the ice heat storage device according to the first aspect is obtained.

Further, according to the invention described in claim 4, in the ice heat storage device according to claim 3, the flow rate of the antifreezing liquid flowing through the ice block ice-generating heat exchanger and the antifreezing liquid flowing through the supercooling water generating heat exchanger. Since the control means for controlling the flow rate is provided, the sherbet-like ice can be generated more stably.

According to the fifth aspect of the invention, the ice water mixing means for mixing the sherbet-shaped ice and water or an aqueous solution is provided in the first heat storage tank of each of the ice heat storage devices. 2 The power required for the water circulation pump can be greatly reduced.

According to the sixth aspect of the invention, the second water circulation path of each of the ice heat storage devices is provided with a flow path through which water or an aqueous solution is sent from the heat load to the first heat storage tank.
Since the flow path switching means for switching the flow path from the heat load to the first heat storage tank and the flow path from the heat load to the second heat storage tank is provided, the sherbet shape stored in the first heat storage tank is provided. The ice can be used without melting, and the power required for the second water circulation pump can be reduced.

According to the invention described in claim 7, water or an aqueous solution is the first in the first water circulation path of each of the ice heat storage devices.
A flow path for supplying water from the evaporator or the supercooled water generation heat exchanger to the second heat storage tank is provided, and a flow path for supplying water from the first evaporator or the supercooled water generation heat exchanger to the second heat storage tank,
Since the flow path switching means for switching the flow path from the first evaporator or the supercooled water generation heat exchanger to the water flow to the first heat storage tank is provided, the same effect as the ice heat storage device according to the sixth aspect is provided.

According to the invention of claim 8, water or an aqueous solution is first in the first water circulation path of each of the ice heat storage devices.
A flow path for supplying water from the heat storage tank to the first evaporator or the supercooled water generation heat exchanger, and a flow path for supplying water from the first heat storage tank to the first evaporator or the supercooled water generation heat exchanger,
Since the flow path switching means for switching the flow path from the second heat storage tank to the water flow to the first evaporator or the supercooled water generation heat exchanger is provided, the refrigerator can be operated efficiently.

Further, according to the invention of claim 9, in addition to the ice heat storage device of claim 8, in the second water circulation path,
A flow path for sending water or an aqueous solution from the heat load to the first heat storage tank is provided, and a flow path for sending water from the heat load to the first heat storage tank and a flow path for sending water from the heat load to the second heat storage tank are provided. Since the flow path switching means for switching is provided, the sherbet-shaped ice can be efficiently sent to the heat load without melting, and the power required for the second water circulation pump can be reduced.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram showing an ice heat storage device according to a second embodiment of the present invention.

FIG. 3 is a pressure-enthalpy diagram showing the operation of the refrigerator according to the second embodiment of the present invention (operation during generation of supercooled water).

FIG. 4 is a pressure-enthalpy diagram showing the operation (operation during freezing) of the refrigerator according to the second embodiment of the present invention.

FIG. 5 is a configuration diagram showing an ice heat storage device according to a third embodiment of the present invention.

FIG. 6 is a configuration diagram showing an ice heat storage device according to a fourth embodiment of the present invention.

FIG. 7 is a configuration diagram showing an ice heat storage device according to a fifth embodiment of the present invention.

FIG. 8 is a configuration diagram showing an ice heat storage device according to a sixth embodiment of the present invention.

FIG. 9 is a configuration diagram showing an ice heat storage device according to a seventh embodiment of the present invention.

FIG. 10 is a configuration diagram showing an ice heat storage device according to Embodiment 8 of the present invention.

FIG. 11 is a configuration diagram showing an ice heat storage device according to a ninth embodiment of the present invention.

FIG. 12 is a configuration diagram showing a first conventional ice heat storage device.

FIG. 13 is a configuration diagram showing a second conventional ice heat storage device.

[Explanation of symbols]

1 Refrigerator, 2 Compressor, 3 Condenser, 4 1st flow control valve, 5 1st evaporator, 6 Water or aqueous solution, 7 Sherbet-shaped ice, 8 1st heat storage tank, 9 Supercooling cancellation means, 10th 1 water circulation pump, 11 1st water circulation path, 1
2a, 12b heat load, 13a, 13b second water circulation pump, 14a, 14b second water circulation path, 15a, 15b
2nd evaporator, 16 ice block ice, 17b 2nd flow control valve, 18b refrigerant bypass flow path, 20 2nd heat storage tank, 21
Communication pipe, 22 Ice water mixing means, 30 Second flow rate control valve, 31 Refrigerant bypass flow path, 32 Open / close valve, 40 Supercooling water generation heat exchanger, 41 Antifreeze circulation pump, 42
Ice block ice generation heat exchanger, 43 antifreeze circulation passage, 45 antifreeze bypass flow passage, 46 antifreeze flow control valve, 50 flow passage switching means, 60 flow passage switching means, 70 flow passage switching means, 71 bypass flow passage, 80 flow passage Switching means, 81 bypass flow path, 82 second flow path switching means.

Front page continuation (72) Inventor Naoki Tanaka 3-18-1, Oga, Shizuoka City Mitsubishi Electric Co., Ltd. In the Center for Living Environment Engineering (56) Reference JP-A-64-75869 (JP, A) JP Japanese Unexamined Patent Publication No. 3-91635 (JP, A) Japanese Unexamined Patent Publication No. 6-347144 (JP, A) Japanese Unexamined Patent Publication No. 2-166330 (JP, A) Japanese Unexamined Patent Publication No. 5-346246 (JP, A) Actual Development Sho 63-2022 (JP , U) J. Kohei 4-38178 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24F 5/00 102 F25C 1/00

Claims (9)

(57) [Claims] 1. A refrigerator having a first evaporator and a second evaporator, water that is supercooled by the first evaporator or an aqueous solution obtained by adding an additive to water is released from supercooling, and sherbet-like ice is removed. Supercooling releasing means for generating, a first heat storage tank for storing the sherbet-like ice, a first water circulation pump for sending and circulating water or an aqueous solution in the first heat storage tank to the first evaporator, first
A second water circulation pump that sends water or an aqueous solution in a heat storage tank or ice water mixed with sherbet-like ice to a heat load and circulates it, and arranges a second evaporator in the tank, and an ice block that forms on the outer periphery of the second evaporator Second heat storage tank for storing ice-like ice, and a communication pipe connecting the first heat storage tank and the second heat storage tank, the second heat storage tank, the first water circulation pump, the first evaporator, the first heat storage tank, the communication pipe The water or aqueous solution or the ice water circulates in the order of the first water circulation path through which the water or aqueous solution circulates, the first heat storage tank, the second water circulation pump, the heat load, the second heat storage tank, and the communication pipe. An ice heat storage device that constitutes a second water circulation path. 2. The ice heat storage device according to claim 1, further comprising control means for controlling a flow rate of the refrigerant flowing through the first evaporator and a flow rate of the refrigerant flowing through the second evaporator. . 3. A refrigerator having an evaporator, which cools an antifreeze liquid that does not solidify at least 0 ° C., and heat exchange is performed between the antifreeze liquid cooled by the refrigerator and water or an aqueous solution obtained by adding an additive to water. A supercooled water generation heat exchanger that supercools the water or the aqueous solution, the antifreeze liquid cooled by the refrigerator, and an ice mass that generates ice mass ice by heat exchange of water or an aqueous solution in which an additive is added to water. Ice-cooling pump, an antifreeze circulation pump for sending the antifreeze to the ice-cooled ice-cooling heat exchanger, the ice-cooled ice-cooling heat exchanger, and the supercooled water or aqueous solution to remove the supercooling. Means for generating ice, a first heat storage tank for storing the sherbet-like ice, a first water circulation pump for circulating water or an aqueous solution in the first heat storage tank to the supercooled water generation heat exchanger, 1) Water or aqueous solution in heat storage tank, or second water circulation pump for sending and circulating ice water mixed with sherbet-like ice to heat load, the above ice block ice formation heat exchanger is arranged in the tank, and above ice block ice formation An evaporator having a second heat storage tank for storing ice-lump-like ice generated on the outer periphery of the heat exchanger, and a communication pipe connecting the first heat storage tank and the second heat storage tank,
An antifreeze liquid circulation passage through which the above antifreeze liquid circulates in the order of an antifreeze liquid circulation pump, an ice block ice formation heat exchanger, and a supercooled water formation heat exchanger, a second heat storage tank, a first water circulation pump, a supercooled water generation heat exchanger, A first water circulation path in which the water or aqueous solution circulates in the order of the first heat storage tank and the communication pipe, and the water or aqueous solution in the order of the first heat storage tank, the second water circulation pump, the heat load, the second heat storage tank, and the communication pipe. Or an ice heat storage device that constitutes a second water circulation path through which the ice water circulates. 4. The ice heat storage device according to claim 3, further comprising a control means for controlling a flow rate of the antifreeze liquid flowing through the ice block ice generating heat exchanger and a flow rate of the antifreeze liquid flowing through the supercooled water generating heat exchanger. An ice heat storage device characterized by. 5. The ice heat storage device according to claim 1 or 3, wherein ice water mixing means for mixing the sherbet-shaped ice in the first heat storage tank with water or an aqueous solution is provided in the first heat storage tank. A characteristic ice heat storage device. 6. The ice heat storage device according to claim 1 or 3, wherein the second water circulation passage is provided with a flow path for sending water or an aqueous solution from a heat load to the first heat storage tank, and the first heat storage device is connected to the first heat storage tank. An ice heat storage device comprising flow path switching means for switching between a flow path for supplying water to the heat storage tank and a flow path for supplying water to the second heat storage tank from the heat load. 7. The ice heat storage device according to claim 1 or 3, wherein water or an aqueous solution is fed to the first water circulation path from the first evaporator or the supercooled water generation heat exchanger to the second heat storage tank. A channel is provided, and a flow path for sending water from the first evaporator or supercooled water generation heat exchanger to the second heat storage tank, and a flow path for water from the first evaporator or supercooled water generation heat exchanger to the first heat storage tank An ice heat storage device, characterized in that it is provided with a flow path switching means for switching between the flow path and the flow path. 8. The ice heat storage device according to claim 1 or 3, wherein water or an aqueous solution is sent to the first water circulation path from the first heat storage tank to the first evaporator or the supercooled water generation heat exchanger. A channel is provided, and a flow path from the first heat storage tank to the first evaporator or the supercooled water generation heat exchanger, and a flow path from the second heat storage tank to the first evaporator or the supercooled water generation heat exchanger. An ice heat storage device, characterized in that it is provided with a flow path switching means for switching between the flow path and the flow path. 9. The ice heat storage device according to claim 8, wherein the second water circulation path is provided with a flow path through which water or an aqueous solution is fed from a heat load to the first heat storage tank, and the heat load is used to supply the first heat storage tank. An ice heat storage device, characterized in that a flow path switching means is provided for switching between a flow path for supplying water to the second heat storage tank and a flow path for supplying water to the second heat storage tank.