JPH09159231A - Ice heat accumulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ice heat accumulating device in which icing can be positively prevented at a nozzle injection port of a non-freezing liquid injection nozzle even at a heat accumulating tank having a short height size, instant countermeasure can be performed at the icing location due to a certain reason or the like and a stable ice making operation can be carried out. SOLUTION: There are provided a non-freezing liquid cold heat supplying system A1 in which non-freezing liquid is taken out of a bottom part of a heat accumulating tank 21, cooled to 0 deg.C or less and circulated back to a non-freezing liquid injection nozzle 30 at an upper part of the heat accumulating tank, and a non-freezing liquid cold heat bypassing system B1 in which the non-freezing liquid is taken out of a bottom part of the heat accumulating tank and circulated back to the non-freezing liquid injection at an upper part of the heat accumulating tank under non-cooled state. The non-freezing liquid injection nozzle is comprised of an inner pipe for injecting non-freezing liquid in the non-freezing liquid cold heat supplying system against water 24 to generate ice and an outer pipe covering the inner pipe, injecting non-freezing liquid passed through a non-frozen liquid bypassing system against water to form a film of non-freezing liquid. A piping 29 in the non-freezing liquid bypassing system is provided with a sensing means 39 for use in sensing a state in which a location of the nozzle injection port of the outer pipe at the non-freezing liquid injection nozzle shows an abnormal low temperature, and a hot heat source 40 for heating the non-frozen liquid flowing in the non-frozen liquid bypassing system at a nozzle injection port location when the abnormal low temperature state is detected.

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 generating sherbet-like ice in a heat storage tank to store cold heat, and for thawing the ice during the daytime to use it for cooling, particularly as a cooling medium. The present invention relates to improvement of an ice heat storage device that uses an antifreeze solution and performs an ice making operation of directly injecting the antifreeze solution into water in a heat storage tank.

[0002]

2. Description of the Related Art Conventionally, as an ice heat storage device, sherbet-like ice is generated in a heat storage tank mainly by using electric power at night.
It is known that the cold heat of the generated ice is stored in a heat storage tank, and when the cold heat is used during the daytime, the ice is rapidly thawed and the cold heat is supplied to a cooling device or a cooling device for electric power. . According to this ice heat storage device, it is possible to reduce the power demand for cooling concentrated in the daytime by using inexpensive late-night electric power to generate ice, and at the same time, by utilizing the latent heat of melting ice, the heat source device Since it can reduce the load on the air conditioning system, there are great expectations in the field of air conditioning, especially in the air conditioning system for buildings and relatively large capacity systems such as district heat supply systems.

FIG. 5 is a system configuration diagram showing a conventional example of such an ice heat storage device.

This ice heat storage device uses, for example, an antifreeze liquid having a larger specific gravity than water as a cold heat medium. That is, the bottom portion of the heat storage tank 1 having a certain vertical height is the antifreeze liquid storage portion 2, and the antifreeze liquid 3 having a specific gravity larger than that of water is stored in the antifreeze liquid storage portion 2, and the heat storage liquid is stored above it. Water 4 as a medium is stored.

A first antifreeze pipe 5 for flowing out the antifreeze liquid is connected to the bottom of the heat storage tank 1, and an antifreeze pump 6 is provided in the first antifreeze pipe 5. The first antifreeze pipe 5 is branched into two parts on the downstream side of the antifreeze pump 6, one of the branch pipes is a second antifreeze pipe 7, and after being connected to a refrigerator 8 for cooling the antifreeze liquid, a reflux pipe portion 7a Is guided to the antifreeze liquid injection nozzle 10 at the upper part of the heat storage tank 1 and constitutes the antifreeze liquid cold heat supply system A. The other branch pipe is a refrigerator 8.
The bypass pipe 9 that bypasses the antifreeze liquid injection nozzle 1
The antifreeze bypass system B is constructed by being guided to 0.

The refrigerator 8 is connected to a closed loop cooling water pipe 11 different from the antifreeze liquid cold heat supply system A, and the cooling water pipe 11 has a cooling tower 12 and a cooling water pump 13.
Is provided, and cooling water for cooling the antifreeze liquid is circulated to the refrigerator 8.

During operation, the antifreeze liquid stored in the bottom of the heat storage tank 1 flows out to the first antifreeze liquid pipe 5 by the operation of the antifreeze liquid pump 6, and then the refrigerator 8 in the antifreeze liquid cold heat supply system A.
Is cooled to a low temperature and supplied to the antifreeze liquid injection nozzle 10 in the upper part of the heat storage tank 1, while it is supplied to the antifreeze liquid injection nozzle 10 without being cooled in the antifreeze liquid bypass system B.

FIG. 6 shows the construction of the antifreeze nozzle 10 and its operation. This antifreeze nozzle 10 is connected to the second antifreeze pipe 7 of the antifreeze cold heat supply system A, and a small-diameter inner pipe 14, and is connected to the bypass pipe 9 of the antifreeze bypass system B provided so as to cover the inner pipe 14. It has a large-diameter outer tube 15. The refrigerator 8 is provided in the inner pipe 14.
At this time, the antifreeze liquid 3a cooled to 0 ° C. or less is supplied, and the low temperature antifreeze liquid 3a is sprayed from the nozzle injection port 16 into the water 4 of the heat storage tank 1, thereby the antifreeze liquid 3a and the water in the heat storage tank 1 are supplied. 4 is brought into direct contact with each other and heat is exchanged, whereby the water 4 is frozen in a fluid state and sherbet-like ice 17 is produced. The antifreeze liquid that lost the cold due to heat exchange is stored in the heat storage tank 1.
Return to the antifreeze reservoir 2 at the inner bottom of the. This cycle is repeated continuously.

On the other hand, the outer pipe 15 has an antifreeze bypass system B
The warm antifreeze liquid 3b from the inside is supplied, and this antifreeze liquid 3b is injected from the inner pipe 14 at the nozzle injection port 16
While being sprayed to the outside of the antifreeze liquid 3 a having a temperature of not more than 0 ° C. to form the outer peripheral film 18, it is sprayed into the heat storage tank 1.

Due to the outer peripheral film 16, the antifreeze liquid 3a of 0 ° C. or lower, which is sprayed from the inner pipe 14, is sprayed into the water immediately after being sprayed from the nozzle spray port 16 without directly contacting the water 4. The occurrence of ice accretion at the nozzle injection port 16 is prevented. Normally, the flow rate of the warm antifreeze liquid 3b is smaller than that of the antifreeze liquid 3a at 0 ° C. or less, and the nozzle injection port 1
Although the outer peripheral film is formed at the position immediately after 6, the nozzle injection port 1
Since it diffuses when it reaches a position sufficiently distant from 6, it does not hinder the production of ice by an antifreeze solution at 0 ° C or lower.

[0011]

By the way, in the above-mentioned conventional ice heat storage device, there is no problem if the installation space of the heat storage tank 1 is sufficiently wide and the height dimension of the heat storage tank 1 can be sufficiently taken. A problem arises when the height dimension of the heat storage tank 1 is small, such as the installation space of the tank 1 is insufficient.

That is, when the height dimension of the heat storage tank 1 is small, the mounting height of the antifreeze solution injection nozzle 10 installed in the heat storage tank 1 becomes low, and the antifreeze solution heat storage tank 1 is sprayed into water below 0 ° C. Since the distance from which the water 4 falls while exchanging heat with the water 4 becomes short, it may be recovered in the antifreeze storage part 2 at the bottom of the heat storage tank 1 while keeping the temperature at 0 ° C. or lower.

In this case, when the antifreeze liquid 3b taken out from the antifreeze liquid storage part 2 and circulated from the antifreeze liquid bypass pipe 9 to the heat storage tank 1 is sent to the outer pipe 15 of the antifreeze liquid injection nozzle 10 at 0 ° C. or lower, The antifreezing liquid itself in the antifreezing liquid bypass pipe 9 has the ability to generate ice, freezing may occur at the nozzle injection port 16, and the ice making operation may be supported.

The present invention has been made in view of the above circumstances, and even in a heat storage tank having a short height, it is possible to reliably prevent icing at the nozzle injection port of the antifreeze liquid injection nozzle. An object of the present invention is to provide an ice heat storage device that can immediately deal with ice formation in a part and can perform stable ice making operation.

[0015]

In order to achieve the above-mentioned object, the invention of claim 1 is a heat storage tank in which water as a heat storage medium and an antifreeze liquid as a cold heat medium having a larger specific gravity are stored. , An antifreeze liquid cold heat supply system for taking out the antifreeze liquid from the bottom of the heat storage tank, cooling the antifreeze liquid to 0 ° C. or less with a refrigerator, and then returning the antifreeze liquid to the antifreeze liquid injection nozzle provided at the top of the heat storage tank, and the bottom of the heat storage tank Remove the antifreeze from
The antifreeze liquid bypass system is provided, in which the antifreeze liquid bypasses the refrigerator and is returned to the antifreeze liquid injection nozzle provided in the upper part of the heat storage tank in an uncooled state, and the antifreeze liquid injection nozzle is provided.
An antifreeze liquid having a temperature of 0 ° C. or less that has passed through the antifreeze liquid cold heat supply system is jetted into water in the heat storage tank to generate sherbet-like ice by heat exchange, and a small diameter inner pipe is provided to cover the inner pipe, From an outer pipe that forms a warm antifreeze film on the outer peripheral side of the antifreeze liquid of 0 ° C. or less ejected from the inner pipe by injecting the uncooled antifreeze liquid that has passed through the antifreeze liquid bypass system into the water in the heat storage tank In such a case, in the pipe of the antifreeze liquid bypass system, a detection unit that detects a state in which the nozzle injection port portion of the outer pipe of the antifreeze liquid injection nozzle has an abnormally low temperature, and an abnormal low temperature state is detected by the detection unit. It is characterized in that a heat source for heating the antifreeze liquid flowing through the antifreeze liquid bypass system to a temperature at which the antifreeze liquid is not frozen at the nozzle injection port portion is provided.

According to a second aspect of the present invention, in the ice heat storage device according to the first aspect, the detecting means is a temperature sensor provided at a nozzle injection port of the antifreeze liquid injection nozzle, and the heat source is an antifreeze liquid bypass by heat exchange with the outside air. It is an outside air heat exchanger that heats the antifreeze temperature of the system.

According to a third aspect of the present invention, in the ice heat storage device according to the first aspect, the detection means is a temperature sensor for detecting the pipe temperature of the antifreeze bypass system or a pressure sensor for detecting the pressure, and the heat source is the outside air. It is an outside air heat exchanger that heats the antifreeze temperature of the antifreeze bypass system by heat exchange.

According to a fourth aspect of the present invention, in the ice heat storage apparatus according to the second or third aspect, a refrigerating machine for cooling the antifreeze liquid in the antifreeze liquid cold heat supply system by replacing the heat source of the antifreeze liquid bypass system with the outside air heat exchanger. It is characterized in that it is a heat exchanger for exchanging heat with the refrigerant used.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION First to third embodiments of an ice heat storage device according to the present invention will be described below with reference to FIGS.

FIG. 1 is a system diagram showing a system configuration of an ice heat storage device according to the first embodiment, and FIG. 2 is a diagram showing a configuration of an antifreeze liquid injection nozzle provided in the ice storage device.

As shown in FIG. 1, in this embodiment, the bottom portion of the heat storage tank 21 having a constant vertical height is the antifreeze storage portion 2.
2, the antifreeze liquid 23 having a larger specific gravity than water is stored as a cold heat medium in the antifreeze liquid storage portion 22, and water 24 as a heat storage medium is stored above the antifreeze liquid 23.

A first antifreeze pipe 25 for flowing out the antifreeze liquid is connected to the bottom of the heat storage tank 21, and an antifreeze pump 26 is provided in the first antifreeze pipe 25. The first antifreeze pipe 25 is bifurcated on the downstream side of the antifreeze pump 26, and one branch pipe is the second antifreeze pipe 27,
After being connected to the refrigerator 28 for cooling the antifreeze liquid, the antifreeze liquid injection nozzle 30 in the upper part of the heat storage tank 21 is connected by the reflux pipe portion 27a.
And constitutes the antifreeze cold heat supply system A1. The other branch pipe is a bypass pipe 29 that bypasses the refrigerator 28.
And is guided to the antifreeze liquid injection nozzle 30 to form an antifreeze liquid bypass system B1.

The refrigerator 28 is connected to a closed loop cooling water pipe 31 different from the antifreeze liquid cold heat supply system A1, and a cooling tower 32 and a cooling water pump 33 are connected to the cooling water pipe 31.
Is provided, and cooling water for cooling the antifreeze liquid is circulated to the refrigerator 28.

As shown in FIG. 2, the antifreeze liquid injection nozzle 30 is provided with a small diameter inner pipe 34 connected to the second antifreeze liquid pipe 27 of the antifreeze liquid cold heat supply system A1, and an antifreeze liquid bypass system provided so as to cover the inner pipe 34. It has a large-diameter outer pipe 35 connected to the bypass pipe 29 of B1. Then, the antifreeze liquid 23a cooled to 0 ° C. or less by the refrigerator 28 is supplied to the inner pipe 34, and the low temperature antifreeze liquid 23a is injected from the nozzle injection port 36 into the water 24 of the heat storage tank 21, The antifreeze liquid 23a and the water 24 in the heat storage tank 21 are brought into direct contact with each other to perform heat exchange, whereby the water 24 is frozen in a fluid state and sherbet-like ice 37 is generated. The antifreeze liquid that has lost cold heat due to heat exchange returns to the antifreeze liquid storage portion 22 at the inner bottom portion of the heat storage tank 21. This cycle is repeated continuously.

On the other hand, the outer pipe 35 has an antifreeze bypass system B
The warm antifreeze liquid 23b from 1 is supplied, and this antifreeze liquid 2b is supplied.
3b is injected into the heat storage tank 21 at the nozzle injection port 36 while forming the outer peripheral film 38 by being injected outside the antifreeze liquid 23a of 0 ° C. or less injected from the inner pipe 34. Then, due to this outer peripheral film 36, the 0 injected from the inner pipe 34
The antifreeze liquid 23a having a temperature equal to or lower than 0 ° C. is jetted into the water immediately after being jetted from the nozzle jet port 36 without directly contacting the water 24, and ice is not generated at the nozzle jet port 36 to generate ice. It is supposed to be done.

In this device, as shown in FIG. 1, in the bypass pipe 29 of the antifreeze liquid bypass system B1, a detecting means 39 for detecting a state where the nozzle injection port 36 of the outer pipe 35 of the antifreeze liquid injection nozzle 30 has an abnormally low temperature. And a heat source 40 that heats the antifreeze liquid 23b flowing through the antifreeze liquid bypass system B1 to a temperature at which it becomes unfrozen at the nozzle injection port 36 when an abnormally low temperature state is detected by the detection means 39.
Are provided.

In the present embodiment, the detecting means 39 is a temperature sensor 39a for detecting the temperature of the nozzle ejection port 36 of the antifreeze ejecting nozzle 30. The detection signal S1 from the temperature sensor 39a is input to the controller 41.

The heat source 40 is an outside air heat exchanger 40a which heats the antifreeze liquid flowing through the bypass pipe 29 by exchanging heat with the outside air. This outside air heat exchanger 40a
Is controlled to be turned on and off by a control signal S2 output from the controller 41. Then, for example, when the temperature sensor 39a detects that the temperature of the ejection port 36 portion of the antifreeze liquid ejection nozzle 30 becomes 0 ° C. or less, the outside air heat exchanger is output based on the start command output from the controller 41. 40a is activated to heat the antifreeze liquid flowing in the bypass pipe 29 by heat exchange with the outside air.

According to the structure of this embodiment, the antifreezing liquid 23 stored at the bottom of the heat storage tank 21 is in operation.
However, by operating the antifreeze pump 26, the first antifreeze pipe 2
After flowing out to 5, the refrigerator 2 in the antifreeze cold heat supply system A1
It is cooled by 8 and becomes a low temperature of 0 ° C or less, and the heat storage tank 21
Is supplied to the antifreeze liquid injection nozzle 30 in the upper part of the above, while it is supplied to the antifreeze liquid injection nozzle 30 without being cooled in the antifreeze liquid bypass system B1. In this case, when the antifreeze liquid 23b ejected from the outer pipe 35 is in a sufficiently warm state, the outside air heat exchanger 40a is in the off state, but the temperature provided at the nozzle injection port 36 of the antifreeze liquid injection nozzle 30 is Since the sensor 39a detects the temperature of 0 ° C. or lower, when the ice is generated at the nozzle injection port 36 of the antifreeze solution injection nozzle 30 and the ice is grown, the nozzle injection port 30
The temperature sensor 39a provided in the
This will detect a temperature of 0 ° C.

Therefore, the control signal S2 from the controller 41 is output as a start command based on the detection signal S1 from the temperature sensor 39a, the outside air heat exchanger 40a is started and the antifreeze liquid 23b in the antifreeze bypass pipe 29 is added. Be warmed. As a result, the warmed antifreeze liquid 23b is supplied to the antifreeze liquid injection nozzle, and the ice in the nozzle injection port 36 is thawed. After that, when the surrounding temperature exceeds 0 ° C. due to the progress of thawing of the nozzle injection port 36, the controller 41 outputs a stop command based on the detection signal S1 from the temperature sensor 39a,
The operation of the outside air heat exchanger 40a is stopped.

According to the first embodiment described above, the antifreeze liquid 23b having a temperature higher than that of the water 24 and the antifreeze liquid 23 in the heat storage tank 21 is injected by the antifreeze liquid by the heat exchange action between the outside air and the antifreeze liquid 23b in the outside air heat exchanger 40a. It can be supplied to the outer pipe 35 of the nozzle 30, and the ice generated at the nozzle injection port 36 of the antifreeze liquid injection nozzle 30 can be more effectively thawed.

Further, by providing the temperature sensor 39a at the nozzle injection port 36 of the antifreeze liquid injection nozzle 30, the thermal action of the antifreeze liquid works only when icing occurs, and the ice can be thawed. The ice 37 can be efficiently stored in the heat storage tank 21 without interfering with the function of producing the ice 37 by the antifreeze liquid 23a ejected from the inner pipe 34.

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

The ice heat storage device according to this embodiment is different from that of the first embodiment in that the detecting means 39 is a pressure sensor 39b for detecting the pressure in the bypass pipe 29 of the antifreeze bypass system B1. That is, the refrigerator 28
The antifreeze bypass pipe 29 that branches off before is connected to an outside air heat exchanger 40a that performs heat exchange with the outside air, and is configured to allow water to directly pass through the antifreeze injection nozzle 30 without passing through the refrigerator 28. There is. The detection signal S3 of the pressure sensor 39b is input to the controller 41, and the control signal S4 is output from the controller 41 to the heat exchanger 40a. Since other configurations are substantially the same as those in the first embodiment, the same reference numerals as those in FIG. Note that FIG. 2 will be referred to as it is in this embodiment.

According to the configuration of the second embodiment as described above,
During the ice making operation, the heat storage tank 21 has the same operation as that of the first embodiment.
Ice is generated in it and stored. On the other hand, when freezing occurs at the nozzle injection port 36 of the antifreeze liquid injection nozzle 30 and the freezing grows, the grown ice blocks the nozzle injection port 36, so that the pressure in the antifreeze liquid bypass pipe 29 abnormally rises.

Then, the pressure sensor 39b provided in the antifreeze bypass pipe 29 is activated to activate the outside air heat exchanger 40a via the controller 41, and the antifreeze bypass pipe 2
The amount of heat supply to the antifreeze liquid 23b in 9 increases. Therefore, by supplying the warmed antifreeze liquid, the ice in the nozzle injection port 36 is thawed. After the ice in the nozzle injection port 36 is thawed, the pressure in the antifreeze bypass pipe 29 returns to normal, so that the operation of the outside air heat exchanger 40a is stopped.

Incidentally, the condition that the nozzle injection port 36 freezes is that the temperature of the antifreezing liquid in the antifreezing liquid bypass pipe 29 becomes 0 ° C. or less. Therefore, in the second embodiment, instead of the pressure sensor 39b, the temperature sensor ( (Not shown) may be provided. As a result, the temperature sensor is activated only when the temperature of the antifreezing liquid in the antifreezing liquid bypass pipe 29 is 0 ° C. or lower,
The heat exchanger 40a is operated through the controller 41 to increase the amount of heat supply to the antifreeze liquid in the antifreeze liquid bypass pipe 29, and the antifreeze liquid temperature is set to 0 ° C. or higher, while the antifreeze liquid temperature is set to 0.
If the temperature exceeds ° C, the heat exchanger 40 can be stopped.

According to the above second embodiment, by providing the pressure sensor 39a in the antifreeze bypass pipe 29, the antifreeze warming action works only when the pressure in the antifreeze bypass pipe 29 rises due to freezing, and the ice is efficiently cooled. Can be thawed. Thereby, the abnormal pressure rise of the antifreezing liquid pipe 29 can be prevented, and the damage of the antifreezing liquid injection nozzle 30 and the antifreezing liquid pipe 29 can be prevented in advance. When a temperature sensor is provided instead of the pressure sensor 39a, the antifreeze liquid temperature in the antifreeze liquid bypass pipe 29 can always be kept higher than 0 ° C., and icing at the nozzle injection port 36 can be prevented in advance. .

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

The ice heat storage device according to the present embodiment is
The difference from the second embodiment is that instead of the outside air heat exchanger 40a as the heat source 40 of the antifreeze liquid bypass system B1,
The point is that the heat exchanger 40b in the system that exchanges heat with the cooling water 42 as a refrigerant used in the refrigerator 28 for cooling the antifreeze liquid 22a of the antifreeze liquid cold heat supply system A1 is used.

That is, also in this embodiment, the refrigerator 28 for cooling the antifreeze liquid 22a of the antifreeze liquid cold heat supply system A1 is connected to the closed water cooling pipe 31 which is different from the antifreeze liquid cold heat supply system A1. This cooling water piping 3
1, a cooling tower 32 and a cooling water pump 33 are provided, and cooling water for cooling the antifreeze liquid is circulated to the refrigerator 28.

An electric three-way valve 43 is provided on the cooling water pipe 31 downstream of the cooling water pump 33.
Are driven by the motor 44. A cooling water bypass pipe 45 is connected to the three-way valve 43, and the cooling water bypass pipe 45 is connected to the upstream side of the cooling tower 32 through a route different from that of the cooling water pipe 31. When the valve passage of the three-way valve 43 is opened on the side of the cooling water bypass pipe 45, the cooling water 42 that has been heated by the heat exchange with the antifreeze liquid 22a in the refrigerator 28 is passed through the cooling water bypass pipe 45. And is returned to the cooling tower 32.

In this embodiment, the cooling water bypass pipe 45 is connected to the secondary side of the heat exchanger 40b of the antifreeze liquid bypass pipe 29 so that the antifreeze liquid is heated by heat exchange with the cooling water 42. There is.

Then, similar to the first embodiment, for example, a temperature sensor 39a for detecting the temperature of the ejection port 36 of the antifreeze liquid ejection nozzle 30 and a detection signal S1 from the temperature sensor 39a are inputted to perform a control operation. A controller 41 is provided. The control signal S2 output from the controller 41 is input to the operation motor 44 of the three-way valve 43, which drives the three-way valve 43.

For example, the outer tube 35 of the antifreeze injection nozzle 30
Nozzle injection port 36 part of became extremely low temperature below 0 ℃,
If freezing occurs at the nozzle injection port 36,
The motor 44 is driven by the temperature detection by the temperature sensor 39a and the command output from the controller 41, and the three-way valve 43
The valve passage is opened on the side of the cooling water bypass pipe 45. As a result, the warm cooling water 42 circulates in the cooling water bypass pipe 45, and the antifreeze liquid 23b is heated by heat exchange with the antifreeze liquid 23b in the heat exchanger 40b. After the ice in the nozzle injection port 36 is thawed by heating, the three-way valve 43 switches the valve path, the cooling water supply to the cooling water bypass pipe 45 is stopped, and the original cooling on the cooling water pipe 31 side is performed. It becomes a water cycle.

Since the other structure is substantially the same as that of the first embodiment, the same reference numerals as those in FIG. 1 are attached to FIG. 4 and the description thereof is omitted. Further, FIG. 2 is also referred to as it is in this embodiment.

According to the above-described third embodiment, it goes without saying that the same effects as those of the above-described respective embodiments can be obtained, but the antifreeze liquid 22 in the antifreeze liquid bypass pipe 29 in the heat exchanger 40b is obtained.
By exchanging heat between b and the cooling water 42 of the secondary side cooling system of the refrigerator 28, the high-temperature antifreeze liquid 22b can be supplied to the antifreeze liquid injection nozzle 30 without having to take in external heat, and the antifreeze liquid injection nozzle 30 It is possible to more effectively thaw the frost formed at the nozzle injection port 36 portion of the above. Further, since it is due to the action of supplying heat in the same system, there is also an advantage that there is no cold heat loss in the system system and the heat storage efficiency is not reduced. Moreover, by directly detecting the temperature using the temperature sensor 39a at the portion of the nozzle injection port 36 of the antifreeze injection nozzle 30, the thermal action of the antifreeze works only when icing occurs,
The ice can be surely thawed with just enough movement.

[0048]

As described above, according to the present invention, a heat exchanger is provided in the antifreeze liquid bypass pipe, and the antifreeze liquid injected from the outer pipe of the antifreeze liquid injection nozzle is warmed by the heat exchanger. It is possible to prevent icing at the nozzle injection port without impairing the ice formation action due to the direct contact heat exchange between the antifreeze liquid of 0 ° C. or less and water, and a stable ice making operation becomes possible. In addition, a temperature sensor is provided at the nozzle injection port of the antifreeze liquid injection nozzle, or a temperature sensor or pressure sensor is provided at the antifreeze liquid bypass pipe to detect freezing at the nozzle injection port, and the amount of heat supplied to the heat exchanger via the controller. The heat source can be supplied to the heat exchanger only when icing occurs, and the efficiency of the ice heat storage device can be improved. Moreover, as the heat source of the heat exchanger in the antifreeze bypass pipe, by warming the antifreeze using the cooling water of the secondary side cooling system of the refrigerator, the ice storage efficiency can be further improved without lowering the heat storage efficiency. It can be carried out.

[Brief description of the drawings]

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

FIG. 2 is an enlarged cross-sectional view showing the configuration of the antifreeze liquid injection nozzle shown in FIG.

FIG. 3 is a system configuration diagram showing a second embodiment of the ice heat storage device according to the present invention.

FIG. 4 is a system configuration diagram showing a third embodiment of the ice heat storage device according to the present invention.

FIG. 5 is a system configuration diagram showing a conventional ice heat storage device.

FIG. 6 is an enlarged cross-sectional view showing the configuration of the antifreeze solution injection nozzle shown in FIG.

[Explanation of symbols]

 21 Heat Storage Tank 22 Antifreeze Reservoir 23 Antifreeze 23a Antifreeze 23b Antifreeze 24 Water 25 First Antifreeze Piping 26 Antifreeze Pump 27 Second Antifreeze Piping 27a Reflux Piping 28 Refrigerator 29 Bypass Piping 30 Antifreeze Injection Nozzle 31 Cooling Water Piping 32 Cooling Tower 33 Cooling water pump 34 Inner tube 35 Outer tube 36 Nozzle injection port 37 Ice 38 Outer membrane 39 Detection means 39a Temperature sensor 39b Pressure sensor 40 Heat source 40a Outside air heat exchanger 40b Heat exchanger 41 Controller 42 Cooling water 43 Three-way valve 44 Motor 45 Cooling water bypass piping A1 Freezing liquid cold heat supply system B1 Antifreezing liquid bypass system S1 detection signal S2 control signal S3 detection signal S4 control signal

Claims (4)

[Claims] 1. A heat storage tank in which water as a heat storage medium and an antifreeze solution as a cold heat medium having a larger specific gravity than that are stored, and the antifreeze solution is taken out from the bottom of the heat storage tank, and the antifreeze solution is cooled to 0 ° C. or less with a refrigerator. After cooling to, the antifreeze liquid cold heat supply system that recirculates to the antifreeze liquid injection nozzle provided at the top of the heat storage tank, and the antifreeze liquid is taken out from the bottom of the heat storage tank, and the antifreeze liquid bypasses the refrigerator and the upper part of the heat storage tank. An antifreeze liquid bypass system for returning to an antifreeze liquid injection nozzle provided in a non-cooled state, wherein the antifreeze liquid injection nozzle sprays the antifreeze liquid at 0 ° C. or lower through the antifreeze liquid cold heat supply system to water in the heat storage tank. A small-diameter inner tube that generates sherbet-like ice by heat exchange, and an arrangement provided to cover this inner tube, and the uncooled antifreeze solution that has passed through the antifreeze bypass system is added to the water in the heat storage tank. An outer pipe for forming a film of warm antifreeze liquid on the outer peripheral side of the antifreeze liquid of 0 ° C. or less ejected and ejected from the inner pipe, wherein the pipe of the antifreeze liquid bypass system is connected to the outer pipe of the antifreeze liquid injection nozzle. Detection means for detecting a state in which the nozzle injection port part of is at an abnormally low temperature,
An ice heat storage device provided with a heat source for heating the antifreeze liquid flowing through the antifreeze liquid bypass system to a temperature at which the nozzle is not frozen when the abnormal low temperature state is detected by the detection means. . 2. The ice heat storage device according to claim 1, wherein the detection means is a temperature sensor provided at a nozzle injection port of the antifreeze liquid injection nozzle, and the heat source is configured to detect the antifreeze liquid temperature of the antifreeze liquid bypass system by heat exchange with the outside air. An ice heat storage device, which is an outside air heat exchanger for heating. 3. The ice heat storage device according to claim 1, wherein the detecting means is a temperature sensor for detecting the pipe temperature of the antifreeze bypass system or a pressure sensor for detecting the pressure, and the heat source is an antifreeze bypass by heat exchange with the outside air. An ice heat storage device characterized by being an outside air heat exchanger for heating the antifreeze temperature of a system. 4. The ice heat storage device according to claim 2 or 3, wherein the heat source of the antifreeze bypass system is replaced with an outside air heat exchanger, and a refrigerant used in a refrigerator for cooling the antifreeze of the antifreeze cold heat supply system is used. An ice heat storage device characterized by being a heat exchanger for exchanging heat.