JPH07111289B2 - Ice making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an ice-making device that supercools water or an aqueous solution in a water circulation path to generate a slurry-like frozen product and stores it in an ice storage tank. In particular, it relates to measures for improving performance.

(Prior Art) Conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 1-144722, a water circulation path for circulating water in an ice storage tank between a heat exchanger and an ice storage tank provided in a refrigerant circuit. In the ice making device in which the water in the ice storage tank is turned into slurry-like ice by heat exchange with the refrigerant in the refrigerant circuit, the outlet side of the water circulation path is opened to store the supercooled water. A device that drops an ice gutter on a slant gutter installed at a certain height above the water surface of the ice tank, ices the water into a slurry while passing through this gutter, and stores iced products in the ice storage tank below. Is a known technique.

Further, in the same publication, by providing a supercooling zone for further subcooling water by using the refrigerant or the like of the refrigerant circuit in the middle of the inclined trough, the supercooled state of water is eliminated and ice formation is caused. It is also disclosed.

(Problems to be Solved by the Invention) However, when a supercooling elimination section for eliminating a supercooled state of water is provided above the ice storage tank as in the conventional one,
There is a problem in that a space for that is required, design constraints become large, and once the water is exposed to the air, cold heat is released into the air, resulting in a large heat loss.

Therefore, by setting the water circulation path as a closed circuit, a supercooled state is produced in the water in the water circulation path, and the supercooled state is eliminated to generate a slurry-like iced substance, which is circulated in the ice storage tank. It is possible to avoid design restrictions and heat loss.

However, like the above-mentioned conventional one, when the water in the refrigerant circuit is recooled by using the refrigerant in the refrigerant circuit as a means for eliminating the supercooled state of the water, when the refrigerant state in the refrigerant circuit changes, the supercooling occurs accordingly. The amount of recooling for eliminating the state also changes, and there is a possibility that stable ice making cannot be performed.

The present invention has been made in view of such points, and an object thereof is to enable stable ice making by providing a means capable of adjusting the recooling amount regardless of the state of the refrigerant in the refrigerant circuit. is there.

(Means for Solving the Problem) In order to achieve the above object, the first means for solving the problems is to store a slurry of iced water or an aqueous solution in an ice making device as shown in FIG. An ice storage tank (5), a water circulation path (51) configured by a pipe member and connected to form a closed loop with the ice storage tank (5) for forcedly circulating water or an aqueous solution, A heat exchanger (22), which is interposed in the water circulation path (51) and is connected to a cooling device, for supercooling the water or aqueous solution flowing through the water circulation path (51) to a low temperature state, and the polarity of the applied voltage. Accordingly, the heat exchange part has two heat exchange parts which are heat absorption parts or heat dissipation parts, and at least the heat exchange part which is the heat absorption part of the two heat exchange parts is arranged in the pipe member of the water circulation path (51), Re-cool the water or aqueous solution to eliminate the supercooled state of the water or aqueous solution. Is obtained by a configuration in which the chromatography mode module (8).

A second solving means is an ice storage device (5) for storing a slurry of iced water or an aqueous solution in an ice making device, and a closed loop with respect to the ice storage tank (5) formed of a pipe member. A water circulation passageway (51) connected to form the water or aqueous solution for forced circulation, and water flowing through the water circulation passageway (51) interposed in the water circulation passageway (51) and connected to a cooling device. Alternatively, it has a heat exchanger (22) for supercooling the aqueous solution to a low temperature state, and two heat exchange sections that change from a heat absorbing section to a heat radiating section according to the polarity of the applied voltage. One of the heat exchange parts is arranged so as to be able to exchange heat with water or an aqueous solution in the water circulation path (51), and the polarity of the applied voltage is switched at predetermined intervals, and water or Re-cool the water or aqueous solution to eliminate the supercooled state of the aqueous solution, while releasing heat A thermo module (8) for heating so as to separate the adhesion of the iced substance to the inner wall of the tube member during the partial period is provided.

A third solving means is the same as the second solving means, wherein a plurality of the thermomodules (8) are provided, and the periods serving as the heat absorbing portions of the thermomodules (8) overlap each other. .

A fourth means for solving the problem is that an ice making device is provided with an ice storage tank (5) for storing a glaze in the form of a slurry of water or an aqueous solution, and a closed loop for the ice storage tank (5) formed of a pipe member. A water circulation passageway (51) connected to form the water or aqueous solution for forced circulation, and water flowing through the water circulation passageway (51) interposed in the water circulation passageway (51) and connected to a cooling device. Alternatively, it has a heat exchanger (22) for supercooling the aqueous solution to a low temperature state, and two heat exchange parts which are always heat absorbing parts or heat radiating parts depending on the polarity of a constant applied voltage. The water or aqueous solution is arranged so that the heat exchange section is capable of exchanging heat with the water or aqueous solution in the water circulation path (51), and the supercooled state of the water or aqueous solution is eliminated by the heat exchange section which is always the endothermic section. While re-cooling the heat exchanger, A thermo module (8) for heating so as to prevent the freezing to the side is provided.

A fifth solution means is that, in the second, third or fourth solution means, the heat exchange part of the thermo module (8) is arranged in the pipe member of the water circulation path (51).

(Operation) With the above configuration, in the invention of claim (1), in the water circulation path (51) downstream of the heat exchanger (22), water or an aqueous solution is recooled by the heat absorption section of the thermomodule (8), The supercooled state of water or the like supercooled in the exchanger (22) is eliminated, and a slurry-like iced substance is produced.

In that case, the water circulation path (51) forms a closed loop with the ice storage tank (5), and the water or the aqueous solution is forcedly circulated in the water circulation path (51). The generated slurry-like ice is efficiently packed in the ice storage tank (5) as compared with a case where the ice is simply dropped from above the ice storage tank. That is, the so-called IPF (Ice Packing Facto
r) (Ice storage rate) will be greatly improved.

Moreover, since the thermo module (8) is arranged as a recooler, the cooling amount does not change depending on the state of the refrigerant unlike the recooler using the refrigerant in the refrigerant circuit.
It is easy to adjust the cooling rate. Therefore, a stable effect of eliminating the supercooled state is obtained, and the heat exchange section of the thermomodule (8) is arranged in the pipe member.
It acts as an obstacle to the flow of supercooled water, and the flow becomes turbulent, so that the effect of eliminating supercooling becomes remarkable.

In the invention of claim (2), in addition to the function of claim (1),
Since the polarity of the voltage applied to the thermo module (8) is switched at predetermined time intervals, ice is generated in the period in which the heat exchanging portion of the thermo module (8) serves as a heat absorbing portion, while that in the period serving as a heat radiating portion. Freezing is prevented by dissociation of adhesion of iced substances to the tube wall, and ice making and freeze prevention are performed in a single heat exchange section.

According to the invention of claim (3), in the invention of claim (2), a plurality of thermomodules (8) are provided, and the period in which the heat exchange parts of the thermomodules (8), ... Since the polarity of the applied voltage is switched so as to wrap, ice making is always performed in the heat exchange part of any of the thermo modules (8), ... .

In the invention of claim (4), in addition to the operation of claim (1),
Water and the like are re-cooled in the heat absorbing part of the thermo module (8), while adhesion of the iced substance to the pipe wall is dissociated in the heat radiating part, so there is no need to provide a separate member for preventing freezing progress.
Freezing to the heat exchanger is prevented from progressing and the structure is simplified.

According to the invention of claim (5), in the invention of claim (2), (3) or (4), the heat exchange part of the thermomodule (8) is arranged in the pipe member. In addition to the action of (2), (3) or (4), the action of claim 1 is achieved.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings starting from FIG.

FIG. 2 shows the configuration of the refrigerant circuit (1) of the air conditioner of the first embodiment, where (11) is the first compressor and (12) is the discharge side of the first compressor (11). , An outdoor heat exchanger for exchanging heat between the refrigerant and the outdoor air, (13) is the outdoor heat exchanger (12)
Is an outdoor electric expansion valve that adjusts the refrigerant flow rate or reduces the pressure, and the above-mentioned devices (11) to (13) are connected in series in the first conduit (14).

Further, (21) is the second compressor, (22) is the second compressor (2
A water heat exchanger arranged on the discharge side of 1) for supercooling water or an aqueous solution in an ice storage tank (5) described later, and (23) the water heat exchanger (22) functions as a condenser. It is a water-side electric expansion valve that adjusts the flow rate of the refrigerant at times and reduces the pressure of the refrigerant when it functions as an evaporator.
3) is connected in series in the second conduit (24).

Note that (SD ₁ ) and (SD ₂ ) are the compressors (11) and (21), respectively.
The oil separators (C ₁ ), (C ₂ ) provided in the discharge pipe of each of the oil separators (SD ₁ ), (SD ₂ ) are connected to the suction side of each compressor (11), (21). These are capillary tubes for pressure reduction, which are respectively interposed in the oil return pipes (RT ₁ ) and (RT ₂ ) provided.

Further, (32) and (32) are indoor heat exchangers arranged in each room, and (33) and (33) are indoor electric expansion valves as pressure reducing valves for reducing the pressure of the refrigerant, and the above-mentioned devices (32). ) And (33) are connected in series, and each set is connected in parallel in the third conduit (34).

The first pipeline (14) and the second pipeline (24) are the third
It is connected in parallel to the pipe line (34) and constitutes a closed circuit in which the refrigerant can circulate. Note that (Ac) is for each compressor (1
It is an accumulator provided in the third conduit (34) on the suction side of 1) and (21).

Further, (2) includes a gas pipe of the outdoor heat exchanger (12) and gas pipes of the indoor heat exchangers (32) and (32) in the compressors (11) and (2
A four-way switching valve (2) which is switched so as to alternately communicate with the discharge side or the suction side of 1), and when the four-way switching valve (2) is switched to the solid line side in the figure, the outdoor heat exchanger (12 ) Functions as a condenser and the indoor heat exchangers (32) and (32) function as evaporators to perform indoor cooling operation, while the four-way switching valve (2) switches to the side of the broken line in the figure, the outdoor heat The exchanger (12) functions as an evaporator, and the indoor heat exchangers (32), (32) function as condensers to perform indoor heating operation.

Further, the gas pipe of the water heat exchanger (22) and each compressor (1
Branch path (2) that bypass-connects the suction pipes of 1) and (21)
5) and the gas pipe of the water heat exchanger (22) to the second compressor (2
A water side switching valve (26) for alternately communicating with the discharge pipe of 1) and the branch passage (25) is provided. The water side switching valve (26)
Uses three ports of the four-way switching valve, and when the water side switching valve (26) is switched to the solid line side in the figure, the gas pipe of the water heat exchanger (22) has a branch path (25). Side, that is, communicating with the suction side of each compressor (11), (21), the water heat exchanger (22) functions as an evaporator, while the water side switching valve (26) is switched to the broken line side in the figure. Sometimes the gas pipe of the water heat exchanger (22) communicates with the discharge pipe of the second compressor (21), and the water heat exchanger (22)
Is designed to function as a condenser. In addition,
(C ₃ ) is a capillary tube provided in the pipe on the dead port side of the water side switching valve (26).

Furthermore, a bypass passage (3) for connecting the discharge pipes of the first compressor (11) and the second compressor (21) is provided,
A check valve (4) which allows only refrigerant flow from the discharge pipe side of the second compressor (21) to the discharge pipe side of the first compressor (11) is provided in the bypass passage (3). There is.

That is, when the outdoor heat exchanger (12) and the water heat exchanger (22) function as condensers, when the condensation temperature in the water heat exchanger (22) is high and the pressure is high, the second compressor (21 )
The discharged gas is discharged to the outdoor heat exchanger (12) side so that the heat radiation amount can be distributed.

Here, the air conditioner is provided with an ice storage tank (5) for storing a slurry iced product of water or an aqueous solution as a heat storage medium, and exchanges heat with the ice storage tank (5). A water circulation path (51) is connected to the container (22) so that water or an aqueous solution can circulate. The water circulation path (51) includes a forward path (51A) for supplying water and the like from the bottom of the ice storage tank (5) to the water heat exchanger (22), and an ice storage tank (22) from the water heat exchanger (22). 5)
Return conduit (51
B) and the pump (52) interposed in the outward path (51A) forcibly circulates the water or aqueous solution in the ice storage tank (5) in the water circulation path (51). There is.

Then, the pump (5) of the forward path (51A) of the water circulation path (51)
On the downstream side of 2), a strainer (53) for removing solid matters such as iced matter and dust in the water or aqueous solution of the water circulation path (51) is provided, and further on the downstream side of the strainer (53). Is
A preheat heat exchanger (6) for preheating water supplied to the water heat exchanger (22) is provided. On the other hand, the liquid line of the refrigerant circuit (1) is provided with a preheating bypass passage (61) for flowing a part of the liquid refrigerant to the preheat heat exchanger (6) by bypassing the water side electric expansion valve (23). On the downstream side of the preheat heat exchanger (6) in the preheat bypass passage (61), a preheat electric expansion valve (62) having a refrigerant decompression function and a flow rate control function is provided. The preheat electric expansion valve (62) and the water side electric expansion valve (23) adjust the refrigerant flow rate of the preheat bypass passage (61) and reduce the pressure of the refrigerant during the ice making operation of the water heat exchanger (22). Is also supposed to do.

Further, as a feature of the present invention, in the return conduit (51B) of the water circulation path (51), the water or the like in the return conduit (51B) is cooled on the downstream side of the water heat exchanger (22). Heat exchanger (22)
A thermo module (8) is provided for eliminating a supercooled state of water or the like supercooled in.

As shown in FIGS. 3 and 4, the thermo module (8) has a cooling surface (heat absorbing portion) and a heating surface (heat radiating portion) depending on the polarity of the voltage applied by the constant voltage power source (Es). It has a first heat electrode (8a) and a second heat electrode (8b) that function as two heat exchange parts for switching between the two, and here, the first heat electrode (8a), which is always the cooling surface, is returned to the return pipe. It is attached in close contact with the outer wall of the pipe of the road (51B). That is, the return conduit (51
Water etc. is recooled through the pipe wall of B), and the water heat exchanger (7)
The supercooled state of water or the like supercooled in (1) is eliminated to produce a slurry-like frozen product.

The thermo module (8) and the water heat exchanger (22)
Between the return pipe (51B) freezing and water heat exchanger (22)
A heat retention heat exchanger (7) is provided as a freezing progress prevention unit for preventing the heat transfer from reaching the heat retention heat exchanger (7) from the liquid line of the refrigerant circuit (1). A heat insulation bypass passage (71) is provided so as to bypass and flow back to the liquid line, and in the heat insulation heat exchanger (7), a return conduit (51B) by heat exchange with the liquid refrigerant in the liquid line. Is heated, and the frozen product produced by eliminating the supercooling of water in the re-cooler (8) and the return pipe (51B) adheres to the pipe wall of the return pipe (51B) to freeze the water heat exchange. It is designed to prevent it from reaching the vessel (22).

The water heat exchanger (22), the thermo module (8), and the heat retention heat exchanger (7) constitute an ice making unit (10) that produces a slurry-like frozen product.

The four-way switching valve (2) is switched to the solid line side in the figure when the air-conditioning apparatus is operating and the indoor cooling operation is performed. When the water side switching valve (26) is switched to the solid line side in the figure, after the refrigerant discharged from each of the compressors (11) and (21) has been condensed in the outdoor heat exchanger (12). , The indoor heat exchangers (32) and (32) evaporate to cool the room. When the water side switching valve (26) is switched to the broken line side in the figure, the refrigerant discharged from the first compressor (11) flows to the outdoor heat exchanger (12), while the second compressor (21). The discharged refrigerant flows into the water heat exchanger (22), is condensed, and then circulates so as to be evaporated in the indoor heat exchangers (32) and (32).

Further, when electric power is cheap at night or the like, a cold storage operation for storing cold heat in the ice storage tank (5) is performed. That is, the four-way switching valve (2) and the water side switching valve (26) are switched to the solid line side in the figure, the indoor electric expansion valves (33) and (33) are closed, and the compressors (11) and (21) are closed. ) Is condensed in the outdoor heat exchanger (12) and then decompressed by the water side electric expansion valve (23) (or preheat electric expansion valve (62)) to be evaporated by the water heat exchanger (22). Thus, the water or the aqueous solution in the ice storage tank (5) is supercooled to be iced, and cold heat is stored in the ice storage tank (5).

Therefore, in this embodiment, during the ice making operation, the water heat exchanger (2) is provided in the return pipe (51B) on the downstream side of the water heat exchanger (22).
The water etc. supercooled in 2) is recooled in the thermo module (8).

In that case, a predetermined amount of cooling is required in order to eliminate the supercooled state of water or the like supercooled by the water heat exchanger (22) by recooling to generate a slurry-like iced substance. Here, in the present invention, since the cooling amount by the thermo module (8) is easily adjusted by the value of the applied voltage, compared with the case where the refrigerant from the refrigerant circuit (1) is used to recool water or the like. Therefore, the amount of cooling does not vary depending on the state of the refrigerant, and thus stable ice making can be performed.

Next, a second embodiment will be described. FIG. 5 shows the structure in the vicinity of the ice making section (10) in the second embodiment, and the structure of the refrigerant circuit (10) is the same as in the first embodiment. In this embodiment, the thermo module (8) is a water heat exchanger (22).
The first heat electrode (8a) is horizontally arranged in the pipe of the downstream return conduit (51B) so that the first heat electrode (8a) is on the lower surface and the second heat electrode (8b) is on the upper surface, and the first heat electrode (8a) and All of the second hot electrodes (8b) are designed to come into direct contact with water or the like. And the sixth
As shown in the figure, the first hot electrode (8a) and the second hot electrode (8a)
The polarity of the voltage V applied to b) is fixed for a certain time (for example, 5 V).
It is designed so as to be reversible every time (about 10 minutes), and by this reversal, each pole (8a), (8b) is switched to the cooling surface and the heating surface.

Therefore, in the present embodiment, since the polarity of the voltage applied to the thermo module (8) is switched every predetermined time, heating and cooling of the return conduit (51B) are switched. That is, when the thermomodule (8) functions as a cooler, the supercooled state of water or the like supercooled by the water heat exchanger (22) is eliminated to generate a glaze in the form of a slurry, while the thermomodule ( When 8) functions as a heater, it is possible to dissociate the produced iced substance from adhering to the tube wall of the return conduit (51B) and prevent freezing near the tube wall. Therefore, it is possible to effectively prevent a decrease in ice making efficiency.

Although the thermomodule (8) is arranged in the pipe of the return conduit (51B) in the above embodiment, both the first heat electrode (8a) and the second heat electrode (8b) are in the return conduit (51B). It may be attached to the outer wall of the pipe so as to be in contact with the pipe.

Since the thermomodule (8) is arranged in the pipe of the return conduit (51B) as in the above embodiment, the first heat electrode (8a) or the second heat electrode (8a) that forms both surfaces of the thermomodule (8) ( When either one of 8b) is the cooling surface, the other is the heating surface. Therefore, by switching the characteristics of the applied voltage at every predetermined time, it is possible to use both surfaces to generate the iced substance and dissociate the adherence to the tube wall with a single member.

In addition, by arranging such an obstacle for the flow of water or the like in the pipe, the flow is disturbed and a vortex is generated, so that the vortex energy can accelerate the elimination of the supercooled state. Also has.

Next, a third embodiment will be described. FIG. 7 shows the structure in the vicinity of the ice making section (10) in the third embodiment, and the structure of the refrigerant circuit (1) is the same as in the first embodiment. In the present embodiment, a plurality (three) of the first to third embodiments are provided in comparison with the second embodiment.
The third thermomodules (8A), (8B), (8C) are arranged along the flow of water or the like in the pipe of the return conduit (51B), and the thermomodules (8A) to (8C) are arranged. ) The endothermic cycle is designed to wrap. That is,
As shown in FIG. 8, the applied voltage of the first thermomodule (8A) is inverted every time a predetermined time t ₀ (solid line in the figure).
On the other hand, the applied voltage of the second thermo module (8B) has the same change pattern, and only the phase thereof is shifted by (1/3) t ₀ (broken line in the figure), and the applied voltage of the third thermo module (8C) Has the same pattern as the second thermo module (8B) and has a phase shift of (1/3) t ₀ (broken line in the figure). Each thermo module (8A) to (8C) has a cooler. The heat exchanging portion functioning as is always present somewhere, and it is possible to continuously generate the above-mentioned slurry-like iced product, and thus to improve the ice making capacity.

In particular, when the thermomodules (8A) to (8C) are arranged in the pipe of the return conduit (51B) as in the third embodiment, the heat absorbing section and the heat radiating section include the thermomodules (8A) to (8A).
Since it can be obtained by switching the function on both sides of (8C), it is extremely effective.

Next, a fourth embodiment will be described. FIG. 9 shows the configuration of the refrigerant circuit (1) of the air conditioner according to the fourth embodiment,
Unlike the above embodiments, the heat retaining heat exchanger (7) and the heat retaining vice path (71) are not provided in this embodiment. The other structure is the same as that of the first embodiment. 10th
The figure shows the configuration near the ice making part (10) in the fourth embodiment, and a single thermo module (8) is arranged in the pipe in the return pipe (51B) immediately downstream of the water heat exchanger (22). Has been done. The thermo module (8) has poles (8a), (8b)
A long rod for generating thermal polarization is provided between
The hot electrode (8a) is placed on the downstream side and the second hot electrode (8b), which is the heating surface, is placed on the upstream side, and the first hot electrode (8a) on the downstream side recools water and the like. The second hot electrode (8b) on the upstream side dissociates the adhesion of the iced matter or the like to the return conduit (51B) while the slurry-like iced matter is generated.

Therefore, in the present embodiment, while water or the like is re-cooled by the first heat electrode (heat absorption part) (8a) of the thermo module (8) to eliminate the supercooled state and produce a slurry-like iced product, Since the adhesion of the iced substance to the tube wall is dissociated by the second heat electrode (heat dissipation part) (8b) and the progress of freezing to the water heat exchanger (22) is prevented, the water heat exchanger (22) It is possible to effectively prevent the heat exchange rate from decreasing. Therefore, it is not necessary to separately provide a member for preventing the freezing progress such as the heat retention heat exchanger (7) in the first embodiment, and the configuration can be simplified.

In the fourth embodiment, the thermo module (8) is composed of a single one, but it is, for example, a plate-shaped one (standard product).
It is also possible to secure the distance between the heat absorbing part and the heat radiating part by stacking a plurality of them, and to use the heat radiating part as a freezing progress preventing part. Moreover, the thermo module (8) is attached to the outer wall of the pipe. It may be.

(Effect of the invention) As described above, according to the invention of claim (1), the water circulation path connected to the ice storage tank so as to form a closed loop is provided, and the water in the ice storage tank is circulated. Force circulation to the road,
After supercooling with a heat exchanger, water etc. is re-cooled by the heat exchange part which is the heat absorption part of the thermomodule arranged in the downstream pipe member, so the slurry can be adjusted easily by adjusting the cooling amount. It is possible to achieve high ice making efficiency while stabilizing the production of iced ice-like products and improving the effect of eliminating supercooling by adding the obstacle effect.

According to the invention of claim (2), a water circulation path connected to the ice storage tank so as to form a closed loop is provided, and water or the like in the ice storage tank is forcedly circulated in the water circulation path, and the water is passed through the heat exchanger. After cooling, the heat exchange section of the thermo module arranged in the pipe member on the downstream side is re-cooled, and the characteristic of the applied voltage of the thermo module is switched every predetermined time.
During the period when the heat exchanging portion functions as the heat absorbing portion, the iced matter is generated, while during the period when the heat exchanging portion functions as the heat radiating portion, it is possible to prevent freezing due to the adhesion of the iced matter to the pipe wall. In addition to the effects, a single thermo-module can be used for ice making and freeze protection.

According to the invention of claim (3), in the invention of claim (2), a plurality of thermomodules are arranged, and each thermomodule is arranged so that the heat exchange section of each thermomodule overlaps a period of being a heat absorbing section. Since the polarity of the applied voltage is switched, the supercooling must be eliminated at any heat exchange part of each thermomodule and continuous ice making can be performed, thus improving the ice storage capacity. be able to.

According to the invention of claim (4), the water circulation path connected to the ice storage tank so as to form a closed loop is provided, and the water etc. in the ice storage tank is forcedly circulated in the water circulation path. After cooling, the heat absorption part of the thermomodule placed in the return pipe downstream of the heat exchanger recools water etc. to eliminate the supercooled state, and at the heat dissipation part, it is possible to prevent the formation of ice on the return pipe wall. Since the adhesion is dissociated to prevent the freezing progress to the heat exchanger, in addition to the effect of claim (1), it is not necessary to provide a separate member for preventing the freezing progress, and the structure is simplified. Can be planned.

According to the invention of claim (5), the above-mentioned claim (2),
In the invention of (3) or (4), since the thermomodule is arranged in the pipe of the return conduit, the obstruction effect of the heat exchange section of the thermomodule is used to prevent the supercooling of water or the like. The solution can be promoted.

[Brief description of drawings]

FIG. 1 is a block diagram showing the basic configuration of the present invention. 2 to 4 show the first embodiment, and FIG. 2 shows the refrigerant piping system diagram showing the configuration of the refrigerant circuit of the air conditioner, and FIG.
The figure is a side view showing a part of the structure near the ice making section in a longitudinal section, and Fig. 4 is a side view schematically showing the structure of the thermomodule,
5 and 6 show the second embodiment, FIG. 5 is a refrigerant piping system diagram showing the configuration of the refrigerant circuit of the air conditioner, and FIG. 6 is a time change of the polarity of the voltage applied to the thermomodule. FIG. 7 is a characteristic view, FIG. 7 and FIG. 8 show a third embodiment, and FIG. 7 is a side view showing a part of the structure in the vicinity of the ice making section in a longitudinal section.
The figure is the characteristic diagram showing the polarity change of each thermo module, 9th
Drawing and Drawing 10 show a 4th example, Drawing 9 is a refrigerant piping system diagram showing composition of a refrigerant circuit of an air harmony device, and Drawing 10 is a side view which shows a part of composition near an ice making part in a longitudinal section. It is a figure. 5: Ice storage tank 8: Thermo module 8a: First heat pole 8b: Second heat pole 22: Water heat exchanger 51: Water circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Nakazawa 1304 Kanaoka-machi, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Sakai Factory Kanaoka Factory

Claims (5)

[Claims] 1. An ice storage tank (5) for storing iced substances in the form of a slurry of water or an aqueous solution, and a pipe member connected to the ice storage tank (5) so as to form a closed loop. Water circulation path for forced circulation of water or aqueous solution (51)
A heat exchanger (22) installed in the water circulation path (51) and connected to a cooling device for supercooling the water or aqueous solution flowing in the water circulation path (51) to a low temperature state; Has two heat exchanging parts which are heat absorbing parts or heat radiating parts depending on the polarity of the heat exchanging part, and at least the heat exchanging part which is the heat absorbing part of the two heat exchanging parts is arranged in the pipe member of the water circulation path (51). And a thermomodule (8) for recooling the water or the aqueous solution so as to eliminate the supercooled state of the water or the aqueous solution. 2. An ice storage tank (5) for storing iced substances in the form of a slurry of water or an aqueous solution, and a pipe member connected to the ice storage tank (5) so as to form a closed loop. Water circulation path for forced circulation of water or aqueous solution (51)
A heat exchanger (22) installed in the water circulation path (51) and connected to a cooling device for supercooling the water or aqueous solution flowing in the water circulation path (51) to a low temperature state; Has two heat exchange parts that change from a heat absorption part to a heat dissipation part according to the polarity of the heat exchange part, and one heat exchange part of the two heat exchange parts heats the water or aqueous solution in the water circulation path (51). It is arranged so that it can be exchanged, and the polarity of the applied voltage is switched every predetermined time, while the water or aqueous solution is recooled so as to eliminate the supercooled state of the water or aqueous solution during the period when it becomes the heat absorbing section, while the heat radiating section is used. (8) that heats so as to separate the adhesion of the iced substance to the inner wall of the tube member during the period
And an ice-making device. 3. The ice making device according to claim 2, wherein a plurality of the thermomodules (8) are provided, and the periods serving as the heat absorbing parts of the thermomodules (8) overlap each other. An ice making device characterized in that 4. An ice storage tank (5) for storing iced material in the form of a slurry of water or an aqueous solution, and a pipe member connected to the ice storage tank (5) so as to form a closed loop. Water circulation path for forced circulation of water or aqueous solution (51)
And a heat exchanger (22) that is interposed in the water circulation path (51) and is connected to a cooling device to supercool water or aqueous solution flowing through the water circulation path (51) to a low temperature state, Has two heat exchanging parts which are always heat absorbing parts or constantly radiating parts depending on the polarity of the applied voltage, and the two heat exchanging parts enable heat exchange with the water or aqueous solution in the water circulation path (51). The water or aqueous solution is arranged so as to recool the water or the aqueous solution so as to eliminate the supercooled state of the water or the aqueous solution in the heat exchanging section which is always the heat absorbing section, and the heat exchanger side is the heat exchanging section which is always the heat radiating section. Ice making device comprising a thermo module (8) for heating so as to prevent the progress of freezing to the ice. 5. The ice making device according to claim (2), (3) or (4), wherein the heat exchange section of the thermomodule (8) is arranged in the pipe member of the water circulation path (51). An ice making device characterized in that