JP2795064B2 - Ice making equipment - 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 making apparatus for circulating a cold storage material in an ice storage tank to produce icy slurry, and more particularly to measuring the amount of icy slurry produced.

[0002]

2. Description of the Related Art As a conventional technique for measuring the amount of ice in an ice making device, disclosed in Japanese Patent Laid-Open Publication No. Hei 3-163342, a change in electrical conductivity due to ice making is detected to measure the amount of ice making.

In the technique disclosed in Japanese Patent Application Laid-Open No. Hei 3-163335, a pigment is mixed in water as a cold storage material, and a change in light transmittance due to ice making is detected to measure the amount of ice making. I have.

In Japanese Patent Laid-Open Publication No. Hei 3-163331, a float having a specific gravity smaller than the specific gravity of water is provided, and a change in the floating height of the float due to ice making is detected to measure the amount of ice making. I have. In other words, in the ice heat storage tank, a float having a specific gravity smaller than the specific gravity of water is provided, and a wire of a reel potentiometer is connected to the float, and when the float is lowered along with a drop in the water surface due to an increase in the amount of ice making, a reel potentiometer is provided. Since the winding amount of the wire increases, the flying height is measured from the change in the winding amount, and the amount of ice making in the ice heat storage tank is calculated.

[0005]

However, among the above-described techniques for measuring the amount of ice making, the measurement of the amount of ice making based on the change in electrical conductivity and the measurement of the amount of ice making based on the light transmittance do not directly measure the amount of ice making. In practice, it is difficult to accurately measure the ice making amount because the displacement amount is very small with respect to the ice making amount.

On the other hand, the measurement of the amount of ice making based on the change of the flying height of the float directly measures the change of the amount of ice making, and the vertical change of the ice layer is clear and the change of the flying height, which is the displacement, is measured. Is easy to grasp.

However, Japanese Patent Laid-Open Publication No.
In the ice making amount measurement device disclosed in Japanese Patent Publication No. 1 (2005), since the flaked ice is put into the ice heat storage tank, the shape of the ice layer does not always become flat depending on the accumulation state of the ice. There is a problem that the floating height of the float changes depending on the shape of the layer, and a large error occurs in the measured value of the ice making amount.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to accurately measure the amount of ice making without being affected by the accumulation state of iced material in an ice storage tank.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that the ice making amount calculating means uses a supercooling temperature signal of a temperature detecting means and a flow rate signal of a flow rate sensor. Then, the ice making amount is calculated based on the supercooling temperature and the flow rate.

Specifically, as shown in FIG. 1 (only the solid line), the means adopted by the invention according to claim 1 is an ice storage for storing a cold storage material (W) iced in a slurry state. Tank (5)
Cooling means (22) for supercooling the cold storage material (W)
Are sequentially connected by a circulation path (51) so that the cold storage material (W) can be circulated to form an ice making circuit (L), and ice generated by eliminating the supercooled state of the supercooled cold storage material (W). It is premised on an ice making device that stores the sulfide in the ice storage tank (5).

A supercooling temperature detecting means (Th2) for detecting the temperature of the cold storage material (W) supercooled by the cooling means (22) is provided.

Further, a flow sensor (73) for detecting a flow rate of the cold storage material (W) flowing through the cooling means (22) is provided.

In addition, the supercooling temperature detecting means (Th2
) And a flow rate signal from the flow rate sensor (73), and an ice making amount calculating means (A1) for calculating an ice making amount based on the super cooling temperature and the flow rate of the cold storage material (W). It is provided with a configuration.

On the other hand, a means taken by the invention according to claim 2 is that the slurry-like iced material is rich in fluidity and spreads naturally on the liquid surface only by flowing into the ice storage tank from the inflow port. By forming the upper surface of the icing material, the position of the flat upper surface of the icing material is detected by the position detection sensor, and the ice making amount calculating means calculates the amount of ice making.

Specifically, as shown in FIG. 2 (only the solid line), the means adopted by the invention according to claim 2 is, in addition to the ice making device as a premise of the invention according to claim 1, the above-described ice storage device. An outlet (81) for the cold storage material (W) is formed in the tank (5), and an inlet (87) for the cold storage material (W) is connected to the ice storage tank.
The structure (5) is formed so as to be open in the cold storage material (W).

Further, the upper surface position (U) of the iced material accumulated on the liquid surface of the cold storage material (W) in the ice storage tank (5) is determined.
A position sensor (91) for continuously detecting the upper surface position (U) following the displacement is provided.

In addition, receiving the position signal of the position sensor (91), the amount of ice making is continuously calculated based on the displacement of the upper surface position (U) of the iced material due to the volume expansion of the cold storage material (W). br /> has a configuration in which a ice amount calculating means for output (A2).

Further, the means according to the third aspect of the present invention is to provide an icy dispersion means for diverting icy matter so as to be uniformly dispersed in an upper part of the ice storage tank so as to flatten the upper surface of the accumulated icy matter. Is what you do.

Specifically, as shown in FIG. 3 (solid line only), the means taken by the invention according to claim 3 is, in addition to the ice making device as a premise of the invention according to claim 1, the above-mentioned ice storage device. The tank (5) has an outlet (81) and an inlet (87) for the regenerator material (W).

Further, iced material of the cold storage material (W) which is provided at a lower portion of the ice storage tank (5) and flows into the ice storage tank (5) from the inlet (87) is supplied to the ice storage tank (5). 5) A plurality of openings (89), (89),.
And an ice dispersing means (83) for diverting the cold storage material (W) in the ice storage tank (5).

In addition, the position sensor (91) and the ice making amount calculating means (A2) according to the second aspect of the present invention are provided.

A fourth aspect of the present invention is to fill an ice storage tank with a liquid cold storage material, and to increase the liquid level of the liquid overflowing into the liquid pipe due to the volume expansion of iced material during ice making. Is used to calculate the amount of ice making.

More specifically, as shown in FIG. 4 (only solid line), the means adopted by the invention according to claim 4 includes, in addition to the ice making device as a premise of the invention according to claim 1, tank (5), the size substantially of the liquid regenerator material (W) is filled
It is configured as a closed container .

Further, in the ice storage tank (5), a liquid pipe (101) whose lower end is opened in the ice storage tank (5) and whose upper end is located above the inner upper surface of the ice storage tank (5). ) Are connected.

The position of the liquid surface is linked by following the displacement of the liquid surface in the liquid pipe (101) due to the volume expansion of the cold storage material (W).
The liquid level sensor (105) for continuous detection is provided.

An ice making amount calculating means (A3) for receiving the liquid level signal of the liquid level sensor (105) and continuously calculating the ice making amount based on the displacement of the liquid level is provided.

According to a fifth aspect of the present invention, there is provided an ice storage tank, in which only a cold storage material liquid flows, and a partition plate for accumulating iced material is stored below the ice storage tank. It is configured to change up and down by the volume expansion of iced material at the time of ice making, and the amount of ice making is calculated by the displacement of the liquid level.

Specifically, as shown in FIG. 5 (only the solid line), the measures taken by the invention according to claim 5 are, in addition to the ice making device as a premise of the invention according to claim 1, in addition to the ice storage device. In the tank (5), an outlet (81) and an inlet (87) for the cold storage material (W) are formed, and the liquid of the cold storage material (W) is formed to flow therethrough. The partition plate (111) that accumulates is stored above the inflow port (87).

Further, a liquid level sensor (119) for detecting the position of the liquid surface of the cold storage material (W) in the ice storage tank (5).
Is provided.

In addition, an ice making amount calculating means (A4) for receiving the liquid level signal of the liquid level sensor (119) and calculating the ice making amount based on the displacement of the liquid level is provided.

Further, the means of the invention according to claim 6 is that the ice making device according to claim 1, 2, 3, 4 or 5 is used for controlling the supercooled state of the cold storage material in the circulation path of the closed circuit ice making circuit. The present invention is applied to an ice making device provided with a supercooling elimination unit for elimination.

More specifically, the measures taken by the invention according to claim 6 are as shown in FIGS.
The ice making device according to 4 or 5, wherein the ice making circuit (L) is configured as a closed circuit.

Further, in the circulation path (51) downstream of the cooling means (22), the supercooling elimination for eliminating the supercooled state of the cold storage material (W) supercooled by the cooling means (22) is provided. The section (8) is interposed.

[0034]

According to the first aspect of the present invention,
The cold storage material (W) flowing through the circulation path (51) is supplied to the cooling means (2).
The supercooled material (W) supercooled by 2) is released from the supercooled state and iced into a slurry, and then stored in the ice storage tank (5).

The supercooling temperature detecting means (Th2) is a regenerator material (W) supercooled by the cooling means (22).
While the flow rate sensor (73) detects the flow rate of the cold storage material (W) flowing through the cooling means (22).

The ice making amount calculating means (A1) receives the temperature signal of the supercooling temperature detecting means (Th2) and the flow rate signal of the flow rate sensor (73), and calculates the supercooling temperature and flow rate of the cold storage material (W). The ice making amount is calculated based on the above.

On the other hand, in the invention according to claim 2, since the chilled material of the cold storage material (W) flowing from the inflow port (87) is in the form of a slurry, it has a high fluidity and the liquid of the cold storage material (W) Spread over the surface and spread evenly over the top of the ice storage tank. Therefore, the upper surface of the iced material accumulated in the upper part of the ice storage tank (5) is always flat. Since the upper surface of the iced material has a constant shape, the displacement of the upper surface position (U) of the iced material is related to the amount of ice making.

Therefore, the position sensor (91) detects the upper surface position (U) of the iced material, and outputs the position signal to the ice making amount calculating means (A).
2), and calculates the amount of ice making based on the relationship between the displacement of the upper surface position (U) of the iced material, the displacement of the upper surface position (U) of the iced material, and the amount of ice making.

Further, in the invention according to the third aspect, the regenerator material (W) containing the slurry-like hydrate flows into the hydrate dispersion device (83) from the circulation path (51), and the liquefaction dispersion device (83) ), The cold storage material (W) is diverted from the openings (89), (89),..., And the hydrated cold storage material (W) is uniformly dispersed in the upper portion of the ice storage tank (5). That is,
The upper surface of the iced material is positively formed as a flat surface by the iced material dispersing means (83).

Further, in the invention according to claim 4, when the iced material is stored in the ice storage tank (5) filled with the cold storage material (W), the cold storage in the liquid pipe (101) is performed by the volume expansion of the iced material. The liquid of the material (W) flows and the liquid level rises. The position of the liquid level is detected by the liquid level sensor (105), and the ice making amount calculating means (A3) calculates the ice making amount based on the displacement of the liquid level.

In the invention according to claim 5, the partition plate (111) accumulates the iced material flowing in from the inflow port (87) downward, while only the liquid flows and forms a liquid layer above. Is done. The liquid level of this liquid layer changes up and down due to the volume expansion of the iced material, and the amount of ice making can be calculated based on the displacement of the liquid level.

Further, in the invention according to claim 6, the supercooling elimination section (8) is provided in the circulation path (51) in which the ice making circuit (L) of claim 1, 2, 3, 4, or 5 is configured as a closed circuit. Is provided, the supercooled state is eliminated in the pipeline, and slurry-like ice is generated. Then, the amount of iced ice is measured by a configuration similar to the first, second, third, fourth or fifth aspect.

[0043]

As described above, according to the first aspect of the present invention, the ice making amount calculating means (A1) is based on the supercooling temperature and the flow rate of the cold storage material (W) flowing through the cooling means (22). By calculating the amount of ice making, the amount of ice making can be measured without being affected by the state of accumulation of icing. In addition, there is no need to attach a sensor to the ice storage tank (5) or to adjust the operation, thereby improving on-site workability.

On the other hand, according to the invention according to claim 2, storage
The upper surface of the slurry-like iced material becomes flat, so that it is possible to detect the upper surface position (U) of the iced material and measure the amount of ice making. Measurement becomes possible.

Further, according to the third aspect of the present invention, the upper surface of the actively accumulated iced material can be flattened by the iced material dispersing means (83), thereby enabling more accurate measurement of the amount of ice making. can do.

According to the fourth aspect of the present invention, the amount of ice making is calculated based on the displacement of the liquid surface of the liquid pipe (101), so that a displacement that accurately corresponds to the amount of ice making can be detected. The amount of ice making can be accurately calculated.

According to the fifth aspect of the present invention, the amount of ice making is calculated based on the displacement of the liquid level of the cold storage material (W), so that the amount of ice making is accurately calculated as in the fourth aspect of the invention. In addition, since it is not necessary to fill the ice storage tank (5) with the cold storage material (W) in calculating the amount of ice making, the pressure resistance of the ice storage tank (5) and the liquid into which a large amount of liquid flows can be obtained. Tube (10
It is not necessary to consider the capacity measure of 1).

Further, according to the invention of claim 6, since the distance from the supercooling elimination section (8) to the ice storage tank (5) can be set freely, the degree of freedom in design is improved. Can be. In particular, in the ice making amount measurement according to the second or third aspect of the invention, in order to supply the cold storage material (W) containing the iced material to the iced material dispersing means (83), the ice storage tank is circulated to the ice storage tank (5). All that is required is to connect the end of the road (51). As a result, the cold storage material (W) is released from the gutter, which is a supercool elimination unit, which is required in an out-of-line cooling type ice making device that once releases the cold storage material (W) into the atmosphere after the supercooling is generated and eliminates the supercooled state. It is not necessary to provide a supply means for recovering (W) and supplying it to the ice storage tank (5). Therefore, it is possible to supply the ice storage material (W) mixed with iced material to the ice storage tank (5) with a simple structure. Can be.

[0049]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 6 and 7 show a first embodiment in which the invention according to claims 1 and 6 is applied to an air conditioner equipped with an ice making device. FIG. 6 shows a configuration of a refrigerant circuit of the air conditioner of the first embodiment. In the figure, the air conditioner (B) includes an air conditioning unit (K) and an ice making device (S).

In the air-conditioning unit (K), (11) is disposed on the discharge side of the first compressor (11), and (12) is an outdoor heat exchanger for exchanging heat between refrigerant and outdoor air. An exchanger (13) is an outdoor electric expansion valve that adjusts or reduces the flow rate of the refrigerant in the outdoor heat exchanger (12), and includes the first compressor (11) and the outdoor heat exchanger (12). ) And the outdoor electric expansion valve (13) are connected in series in the first pipe (14).

Further, (21) is disposed on the discharge side of the second compressor (21), and (22) is disposed on the discharge side of the second compressor (21) for supercooling water or an aqueous solution in an ice storage tank (5) described later. The water heat exchanger (23) adjusts the flow rate of the refrigerant when the water heat exchanger (22) functions as a condenser, and depressurizes the refrigerant when the water heat exchanger (22) functions as an evaporator. A second compressor (21), a water heat exchanger (22), and a water-side electric expansion valve (23).
4) are connected in series.

Incidentally, (SD1) and (SD2) are oil separators provided in the discharge pipes of the compressors (11) and (21), respectively, and (C1) and (C2) are oil separators (SD1). ),
Capillary tubes for pressure reduction interposed in oil return pipes (RT1) and (RT2) provided on the suction side of each of the compressors (11) and (21) from (SD2).

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

The first pipe (14) and the second pipe (24) are connected in parallel to the third pipe (34). Note that (Ac) represents each compressor (11), (21)
An accumulator provided in the third pipe line (34) on the suction side of the accumulator.

In (2), the gas pipe of the outdoor heat exchanger (12) and the gas pipe of the indoor heat exchangers (32), (32) are connected to the discharge side of each of the compressors (11), (21) or A four-way switching valve (2) that switches to alternately communicate with the suction side. When the four-way switching valve (2) is switched to the solid line side in the figure, the outdoor heat exchanger (12) includes a condenser and an indoor Heat exchanger (32),
(32) functions as an evaporator and performs cooling operation indoors, while when the four-way switching valve (2) is switched to the broken line side in the figure, the outdoor heat exchanger (12) operates as an evaporator and an indoor heat exchanger. (3
2) and (32) function as a condenser to perform a heating operation indoors.

Further, a branch (25) for bypass-connecting a gas pipe of the water heat exchanger (22) and a suction pipe of each of the compressors (11) and (21), and a branch of the water heat exchanger (22). A water-side switching valve (26) for alternately communicating the gas pipe with the discharge pipe of the second compressor (21) and the branch passage (25) is provided. The water-side switching valve (26) utilizes three of the four-way switching valves, and when the water-side switching valve (26) is switched to the solid line side in the drawing, the water heat exchanger (22) is used. ) Communicates with the branch line (25), that is, the suction side of each of the compressors (11) and (21), and 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, 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) functions as a condenser. Has been made. (C3)
Is a capillary tube interposed in the piping on the dead port side of the water side switching valve (26).

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

That is, when the outdoor heat exchanger (12) and the water heat exchanger (22) function as condensers, when the condensing temperature in the water heat exchanger (22) is high and the pressure is high, the second compression is performed. The gas discharged from the unit (21) is transferred to the outdoor heat exchanger (1).
2) By escaping to the side, the amount of heat radiation can be distributed.

The ice making device (S) includes an ice storage tank (5) for storing a cold storage material (W) to be iced into a slurry, and the ice storage tank (5) and the water heat exchanger (22). ) Constitute an ice making circuit (L) connected to the regenerative material (W) by a circulation path (51) so as to be able to circulate. The circulation path (51) of the ice making circuit (L) is connected to the water heat exchanger (2) from the lower part of the ice storage tank (5).
2) an outgoing line (51A) for supplying the cold storage material (W) to the cold storage material (W); and a return line (51B) for returning slurry-like iced material from the water heat exchanger (22) to the upper part of the ice storage tank (5). And a pump (5) interposed in the outgoing line (51A).
According to 2), the cold storage material (W) in the ice storage tank (5) is forcibly circulated in the circulation path (51). Water or an aqueous solution is used as the cold storage material (W).

The outgoing line (51) of the circulation path (51)
On the downstream side of the pump (52) of A), the circulation path (51)
A strainer (53) for removing solid matter such as frozen matter and dust in the cold storage material (W) is provided, and a water heat exchanger (53) is provided downstream of the strainer (53). A preheating heat exchanger (6) for preheating the cold storage material (W) supplied to the cooling medium (22) is provided. On the other hand, in the liquid line of the refrigerant circuit (1), a preheating bypass passage (6) through which a part of the liquid refrigerant flows through the preheating heat exchanger (6) by bypassing the water-side electric expansion valve (23).
A preheating electric expansion valve (62) having a refrigerant decompression function and a flow rate control function is provided downstream of the preheating heat exchanger (6) in the preheating bypass passage (61). ing. The preheating electric expansion valve (62) and the water-side electric expansion valve (23) regulate the refrigerant flow rate in the preheating bypass path (61) and reduce the pressure of the refrigerant during the ice making operation of the water heat exchanger (22). Has also been made to do.

Further, a recooler (8) as a subcooling elimination unit is provided in the return pipe (51B) downstream of the water heat exchanger (22). The recooler (8) cools the regenerator material (W) supercooled by the water heat exchanger (22) at a temperature lower than the degree of supercooling and applies an impact to eliminate the supercooled state. It is configured.

A water heat exchanger (22) is bypassed between the liquid line of the refrigerant circuit (1) and the branch (gas line) on the suction side of each of the compressors (11) and (21). A re-cooling bypass passage (65) through which the refrigerant flows is provided. The re-cooling bypass passage (65) is provided with the re-cooling capillary tube (C4) and the re-cooler (8) in this order from the upstream side.
The low-temperature refrigerant depressurized in 4) is circulated to the recooler (8), and the regenerative material (W) supercooled in the water heat exchanger (22) is recooled by heat exchange with the refrigerant. It is configured.

In this case, the gas side pipe of the water heat exchanger (22) is communicated with the branch passage (25) through the water side switching valve (26), while the gas side of the recooler (8) is directly connected. By communicating with the branch path (25), the water-side switching valve (26)
Is maintained at a temperature lower than that of the water heat exchanger (22) by the flow resistance caused by the passage of the water, and the regenerator (W) that has been supercooled by the water heat exchanger (22) is further cooled by the recooler (8). It is configured to be able to cool.

The recooler (8) and the water heat exchanger (2)
2) The return line (51B) is connected to the return line (51B).
A heat retention heat exchanger (7) is provided as a freezing prevention part for preventing freezing of the water from progressing to the water heat exchanger (22). Further, a part of the liquid line of the refrigerant circuit (1) is formed as a heat retaining passage (67) through which the liquid refrigerant flows through the heat retaining heat exchanger (7).

The operation of the air conditioner (B) will be described with reference to FIG. When performing the cooling operation indoors, the four-way switching valve (2) is switched to the solid line side in the figure. When the water-side switching valve (26) is switched to the solid line side in the figure, the refrigerant discharged from each of the compressors (11) and (21) is condensed in the outdoor heat exchanger (12). The room is cooled by evaporating in each of the indoor heat exchangers (32), (32). 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). Discharged refrigerant flows into the water heat exchanger (22), and after being condensed, the indoor heat exchangers (32), (32)
Circulate to evaporate.

When the electric power is low at night or the like, a cold storage operation is performed in which the cold storage is stored in the ice storage tank (5). 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, and each indoor electric expansion valve (33), (33)
, The refrigerant discharged from each of the compressors (11) and (21) is condensed in the outdoor heat exchanger (12), and then the water-side electric expansion valve (2) is closed.
3) (or preheated electric expansion valve (62)) to reduce pressure and evaporate with water heat exchanger (22). Thereby, the ice storage tank (5)
Is supercooled. Then, the supercooled cold storage material (W) is recooled by the recooler (subcooling elimination unit) (8), and the supercooling state elimination is started. Recooler (8)
Cool storage material (W) from which the supercooled state is completely eliminated on the downstream side
Slurry ice is generated therein, and the regenerator material containing the slurry ice is forcibly circulated and stored in the ice storage tank (5), and is used as cold heat during daytime cooling operation.

Next, as shown in FIG. 7, as a feature of the present invention, the inlet water temperature T is provided at the inlet side pipe of the water heat exchanger (22).
An inlet water temperature sensor (Th1) for detecting 1 and an outlet water temperature sensor (Th2) for detecting the outlet water temperature T2 on the outlet side piping.
Are arranged.

The outlet water temperature sensor (Th2) serves as a subcooling temperature detecting means during the cold storage operation, and the water heat exchanger (2)
While the supercooling temperature of the supercooled material (W) supercooled by 2) is detected, the cold storage material (W) heated during the cooling operation.
It is configured to detect the temperature of

Further, a flow rate sensor (73) for detecting the flow rate of the cold storage material (W) flowing through the water heat exchanger (22) is provided on the inlet side pipe of the water heat exchanger (22). .

A controller (C) for controlling the air conditioner (B) is disposed in the air conditioning unit (K). The controller (C) incorporates an ice making amount calculating means (A1), and the ice making amount calculating means (A1) includes:
During the cold storage operation, the supercooling temperature signal of the outlet water temperature sensor (Th2) and the flow rate signal of the flow rate sensor (73) are received, and the ice making amount is calculated based on the supercooling temperature and the flow rate of the cold storage material (W). It is configured to be.

Specifically, assuming that all the heat corresponding to the degree of supercooling (0-T2) of the supercooled regenerative material (W) is used for ice making, the amount of ice making G is obtained by the following equation.

G = {α · (0−T2) · Q / r} · t (1) α: specific heat of cold storage material, Q: mass flow r: latent heat of cold storage material, t: measurement time Using the formula (1), means for calculating the amount of ice making (A1)
Calculates the ice making amount G.

Further, the ice making amount calculating means (A1) adds the return line (51B) to the ice making amount G calculated by the above equation (1).
And the heat loss during storage in the ice storage tank (5).

The ice making amount calculation means (A1) is configured to calculate the remaining ice amount H by the following equation during the cooling operation.

H = G− {α · (T 2 −T 1) · Q / r} · t (2) The second term on the right side of the above equation (2) is cold storage at the entrance and exit of the water heat exchanger (22). The amount of ice melted by the amount of heat corresponding to the temperature difference (T2-T1) of the material (W).

Next, the operation of the ice making device (S) will be described. The cold storage material (W) flowing through the circulation path (51) is supercooled by the water heat exchanger (22), and the supercooled cold storage material (W) is interposed in the closed circuit (51). The supercooling elimination section (8) eliminates the supercooled state, completely eliminates the supercooled state while flowing through the pipeline, and ices into slurry. The cold storage material (W) in which the slurry-like hydrate is mixed is distributed to and stored in the ice storage tank (5) while maintaining a flowable state.

The outlet water temperature sensor (Th2) detects the temperature T1 of the regenerative material (W) supercooled by the water heat exchanger (22), while the flow rate sensor (73) detects the temperature of the water heat exchanger (22). Is detected as the flow rate Q of the cold storage material (W) flowing through.

Then, the temperature signal of the outlet water temperature sensor (Th2) and the flow rate signal of the flow rate sensor (73) are received by the ice making amount calculation means (A1), and based on the supercooling temperature T1 and the flow rate Q, the above (1) is obtained. The ice making amount G is calculated by the formula (1).

According to this embodiment, the ice making amount calculating means (A1
) Calculates the amount of ice making based on the supercooling temperature and the flow rate of the cold storage material (W) flowing through the cooling means (22), so that the amount of ice making is measured without being affected by the accumulation state of the iced material. Can be.

In addition, there is no need to attach the sensor to the ice storage tank (5) or to adjust the operation, and it is possible to save labor for installation on site.

Further, it is possible to measure the amount of ice making in an ice making device that eliminates a supercooled state in a pipeline. In addition, this type of ice making device has an air conditioning unit (K)
Can be installed at a location away from the ice storage tank (5),
There is an advantage that the degree of freedom in design is high. Signal transmission between the controller (C) in the same air conditioning unit (K) and the flow rate sensor (73) and the water temperature sensors (Th1) and (Th2) (near the water heat exchanger (22)). This eliminates the need to provide wiring between the ice storage tank (5) and the controller (C), which are far apart, and can promote the above-mentioned advantages and greatly improve the on-site workability. .

FIG. 8 shows a modification of the first embodiment.
In this modification, a plurality of water heat exchangers (2
This is for measuring the amount of ice making when 2) is installed.

Specifically, three water heat exchangers (22),
(22) and (22) are interposed in parallel in the circulation path (51). In each of the water heat exchangers (22), (22), (22), an inlet water temperature sensor (Th1) and a flow rate sensor (73) are provided at the inlet pipe, and an outlet water temperature sensor (Th2) is provided at the outlet pipe.
) Are arranged. Other configurations are the same as in the first embodiment.

[0086] T1 detected by the outlet water temperature sensor (Th2) of each water heat exchanger (22) and the flow rate sensor (7
Based on the flow rate Q detected in 3), the ice making amount of each of the water heat exchangers (22), (22), (22) is calculated, and the total ice making amount is calculated to calculate the ice making amount of the entire apparatus. .

According to this modification, a plurality of water heat exchangers (2
2), (22), and (22) can also accurately measure the amount of ice making.

FIG. 9 shows a second embodiment of the present invention. In this embodiment, the water heat exchanger (2
Instead of measuring the amount of ice making in 2), the amount of ice making is measured in the ice storage tank (5). In FIG. 9, the preheat heat exchanger (6), the heat retaining heat exchanger (7), and the strainer (5) are used.
Illustration of 3) is omitted.

In the ice storage tank (5) of the ice making device (S), an outlet (81) for the cold storage material (W) connected to the lower wall at the beginning of the outgoing pipe (51A) is provided at the upper part of the side wall. An inlet (87) for the cold storage material (W) connected to the end of the return pipe (51B) is formed. The reason why the outlet (81) is connected to the lower wall of the ice storage tank (5) is to prevent inflow of iced material and to take in relatively high temperature cold storage material (W).

As shown in FIG. 9, a position sensor (91) is provided above the ice storage tank (5) to detect the upper surface position (U) of the iced material accumulated on the liquid surface of the cold storage material (W). Are arranged. The position sensor (91) is a float-type level sensor and has a specific gravity smaller than that of the chilled material of the cold storage material (W).
Therefore, a float member (93) that moves up and down following the displacement of the upper surface position (U) of the iced material, and a signal detection unit (95) that detects the displacement of the float member (93) as a displacement signal. Have been.

The displacement signal of the position sensor (91) is input to the controller (C), and the controller (C) has a built-in ice making amount calculating means (A2). The ice making amount calculating means (A2) receives the position signal of the position sensor (91), holds the relationship between the displacement of the upper surface position (U) of the iced material and the ice making amount, and calculates the upper surface position (U) of the iced material. The ice making amount is calculated based on the displacement and the relationship.
Note that (L) indicates the position of the lower surface of the iced material, and (WL) indicates the position of the water surface.

Next, the operation of the ice making device (S) will be described. Since the chilled material of the cold storage material (W) flowing from the inflow port (87) is in the form of a slurry, it has a high fluidity, spreads over the liquid surface of the cold storage material (W), and is uniformly distributed over the ice storage tank. Spread. As the ice making progresses, the water surface decreases, while the accumulation layer (D) is generated, and the snow-like accumulation layer (D) having a small apparent specific gravity projects from the water surface. Since the accumulation layer (D) of iced material has a snow-covered shape and is formed in a state where the iced material is uniformly dispersed, the upper surface of the iced material is always formed as a flat surface parallel to the water surface. When the upper surface of the iced material has a constant shape, the displacement of the upper surface position (U) of the iced material is related to the amount of ice making.

Further, since the accumulation layer (D) of iced material is formed on a flat surface parallel to the water surface from the beginning of the accumulation, the lower surface of the accumulation layer (D) is also formed on a flat surface parallel to the water surface. Become. Therefore, since the accumulation layer (D) of the iced material is formed in a columnar shape, the amount of ice making can be accurately measured only by measuring the height of the accumulation layer (D), and the displacement of the upper surface position (U) of the iced material is reduced. The relationship with the amount of ice making can be easily grasped.

As the amount of ice making increases, the upper surface position (U) of the iced material changes. The position sensor (91) detects the upper surface position (U) of the iced material, and outputs the position signal to the ice making amount calculation means (A
2), and calculates the amount of ice making based on the relationship between the displacement of the upper surface position (U) of the iced material, the displacement of the upper surface position (U) of the iced material, and the amount of ice making.

According to the present embodiment, since the upper surface of the accumulated iced material of the slurryed iced material becomes flat, it is possible to detect the upper surface position (U) of the iced material and measure the amount of ice making. . For this reason, while measuring the change in the amount of ice making directly, the vertical change of the ice layer is relatively large, and it is possible to take advantage of the fact that the displacement amount is easy to grasp,
High-precision ice-making volume measurement that directly grasps changes in ice-making volume becomes possible.

Further, according to the present embodiment, as in the previous embodiment, the distance from the supercooling elimination section (8) to the ice storage tank (5) can be set freely, so that the degree of freedom of design is increased. Can be improved. By the way, in an ice making device of an outside line eliminating type in which the regenerative material (W) is once released into the atmosphere after the generation of the supercooling to eliminate the supercooling state, the ice making circuit (L) is opened to open the circuit (51). The supercooled material (W) supercooled into the gutter is discharged from the end of the gutter and falls to generate iced material, and the iced material (W) containing the iced material is mixed from the gutter to the iced material dispersing means (83). In order to supply the ice, a supply means for collecting the cold storage material (W) from the gutter and supplying it to the ice storage tank (5) by a pump is required. On the other hand, in the present embodiment, the circulation path (51)
Since the supercooled state is eliminated and icing is generated inside,
It is only necessary to connect the end of the return line (51B) to the inflow port (87). As a result, there is no need for a supply means in the above-mentioned out-of-pipe ice-making apparatus, and therefore, it is possible to supply a cold storage material (W) containing iced substances to the ice storage tank (5) with a simple structure.

Next, FIGS. 10 and 11 show a third embodiment of the present invention. This embodiment is different from the previous embodiment in that the iced material is naturally dispersed to form a flat upper surface of the iced material, whereas the iced material dispersing means (83) for positively and uniformly dispersing the iced material is provided. . In FIG. 10, the illustration of the preheating heat exchanger (6), the heat retaining heat exchanger (7), and the strainer (53) is omitted.

In the ice storage tank (5) of the ice making device (S), an ice dispersion means (83) is provided at a lower portion. The iced substance dispersing means (83) has one tubular dispersing part (85) horizontally protruding into the cold storage material (W). Dispersing unit (85)
The right end is fixed to the side wall of the ice storage tank (5) and is formed at the inlet (87) of the cold storage material (W), while the left end crosses the center of the tank and faces the right end fixed position. It protrudes near the side wall and is formed at the closed end.

Further, as shown in FIG.
Nozzles (89) and (8) as openings are provided on the upper surface of (5).
9), ... are provided in a plurality. These nozzles (8
9), (89),... Divide the cold storage material (W) in which a slurry of iced material is mixed in the stored cold storage material (W), and the chilled material of the cold storage material (W) It is configured to be uniformly dispersed in the upper part of the ice storage tank (5). Other configurations are the same as in the previous embodiment.

Next, the operation of the ice making device (S) will be described. From the return route (51B), the iced substance dispersing means (8
The cold storage material (W) mixed with the slurry-like iced matter flows into 3), and the nozzles (89), (8) of the iced matter dispersing means (83).
9), ..., the cold storage material (W) is diverted. The iced material of the divided cold storage material (W) floats and is uniformly dispersed on the water surface above the ice storage tank (5). That is, the upper surface of the iced material is positively formed on the flat surface by the iced material dispersing means (83). Therefore, the upper surface of the iced material accumulated in the upper part of the ice storage tank (5) is always flat. The upper surface position of the iced material (U), because the upper surface of the iced material always has a constant shape.
Is related to the amount of ice making.

According to the present embodiment, the hydrate dispersion means (8
According to 3), the upper surface of the iced material that has positively accumulated can be flattened, and more accurate measurement of the amount of ice can be performed.

Further, since the supercooled state is eliminated in the circulation path (51) to produce iced matter, the iced substance dispersing means (8)
The ice storage tank (5) has a simple structure simply by connecting the end of the return line (51B) to the inflow port (87) of the item (3), without requiring a supply means in the ice making device of the above-mentioned outside line type. ) Can be supplied with a cold storage material (W) in which iced materials are mixed.

The ice storage means (83) provided at the lower part of the ice storage tank (5) is used to store the cold storage material (W) in which the ice is mixed from the cold storage material (W). The cold storage material (W) and the air, which are iced, are compared with the ice storage device of the out-of-pipe type in which the cold storage material (W) discharged into the space above the liquid surface is dropped onto the water surface. And the heat loss of the cold storage material (W) can be reduced and the corrosion of the wall surface of the ice storage tank (5) caused by the entrainment of air by the storage layer of the iced material can be prevented. .

FIG. 12 shows a fourth embodiment of the present invention. In the present embodiment, the ice storage tank (5) is filled with a liquid cold storage material (W), and the volume of ice produced by the volume expansion of the iced material during ice making is changed by the displacement of the liquid surface overflowing into the liquid pipe to reduce the amount of ice making. It is to be calculated. In FIG. 12, illustration of the preheating heat exchanger (6), the heat retaining heat exchanger (7), and the strainer (53) is omitted.

An ice storage tank (5) of the ice making device (S) has a liquid pipe (101) connected to a side wall, and the liquid pipe (101) has a lower end opening into the ice storage tank (5) and an upper end. Is the above ice storage tank (5)
Is configured to be located above the upper surface of the inside.
The ice storage tank (5) is formed in a size to be filled with the liquid cold storage material (W), and the liquid filling the ice storage tank (5) flows into the liquid pipe (101), When the ice is not made, the liquid level is located at the same level as the upper end of the inside, and this liquid level position becomes the reference liquid level WL0 for calculating the ice making amount.

The filter (10) for preventing the inflow of iced substances into the liquid pipe (101) is provided on the inner surface of the side wall of the ice storage tank (5).
3) is provided.

A liquid level sensor (105) for detecting the position of the liquid level is provided in the liquid pipe (101), and the controller (C) has an ice making amount calculating means (A4).
Is built-in. The ice making amount calculation means (A3) receives the liquid level signal from the liquid level sensor (105) and calculates the ice making amount based on the displacement of the liquid level.

More specifically, the ice making amount calculating means (A3)
During ice making, the displacement of the liquid pipe (10) is determined from the displacement of the liquid level of the liquid pipe (101).
The amount of liquid overflowing in 1) is obtained, the amount of ice making is obtained from the overflow, and the ice volume V with respect to the total volume V of the cold storage material (W) during ice making.
The ice making ratio (IPF), which is the volume ratio of i, is calculated. That is, from the displacement ΔH of the liquid surface, which is the difference between the liquid surface position WL1 during ice making and the reference liquid surface WL0, the ice volume Vi indicates the density of the liquid as ρ
w, the density of the frost is ρi, and the cross-sectional area of the liquid pipe (101) is S
Assuming that 1, Vi = {ρw / (ρw−ρi)} · S1 · ΔH (3) Further, the total volume V of the cold storage material (W) during ice making is stored in the ice storage tank (5).
Assuming that the volume of V0 is V0, V = Vi + Vw = S1 .DELTA.H + V0 (4) Therefore, the IPF (%) is obtained from the expressions (3) and (4).
Is obtained by the following equation.

IPF = {Vi / (Vi + Vw)} × 100 = [{ρw / (ρw−ρi)}｝ S1 △ ΔH / (S1 △ ΔH + V0)] × 100 (5) According to the present embodiment. The operation of measuring the amount of ice made by the ice making device (S) is as follows. When the iced material accumulates in the ice storage tank (5) filled with the cold storage material (W), the liquid pipe (101) is increased by the volume expansion of the storage layer (D). ), The liquid of the cold storage material (W) flows into it, and the liquid level rises. The position of the liquid level is detected by the liquid level sensor (105), and the ice making amount calculating means (A3) calculates the ice making amount based on the displacement of the liquid level.

As described above, according to the present embodiment, the amount of ice making is calculated based on the displacement of the liquid surface of the liquid pipe (101).
The displacement corresponding to the amount of ice making can be accurately detected, and the amount of ice making can be accurately calculated.

FIG. 13 shows a fifth embodiment of the present invention. In this embodiment, the partition plate (11) in which only the liquid flows through the ice storage tank (5) and accumulates
1) is housed, and the liquid level of the ice storage tank (5) is configured to change up and down by the volume expansion of the iced material at the time of ice making, and the amount of ice making is calculated by the displacement of the liquid level. Note that FIG.
Here, the illustration of the preheating heat exchanger (6), the heat retaining heat exchanger (7), and the strainer (53) is omitted.

The ice storage tank (5) of the ice making device (S) has an air circulation port (113) formed in the top wall so that air can be circulated according to the volume change of the cold storage material (W). A partition plate (111) is housed inside. Partition plate (11
1) is formed of a material that can move upward at least by the buoyancy of the accumulation layer of iced material and is formed in a flat plate shape, while a liquid circulation hole (115) through which liquid of the cold storage material (W) can flow but iced material cannot flow. A plurality of punching plates are formed.

On the inner surface of the side wall of the ice storage tank (5), there are provided a plurality of stoppers (117) for allowing the partition plate (111) to be immersed in the liquid against the buoyancy of the storage layer (D) of iced material. ),
(117), ... are protruded above the inflow port (81) of the cold storage material (W), and the plurality of stoppers (117), (1) are provided.
17),... Prevent the partition plate (111) from moving upward due to the lower frost that is going to float upward. The partition plate (111) is held in the water by the stoppers (117), (117),..., And the liquid flows out of the cold storage material (W) in which the icing material flowing in from the inlet (81) is mixed. It is configured to move upward through the hole (115) but prevent upward movement of the iced material and accumulate the iced material below. The ice storage tank (5) is provided with a liquid level sensor (119) for detecting the position of the liquid surface of the cold storage material (W). As the liquid level sensor (119), a known water level sensor such as a float type or a capacitance type is used.

The controller (C) receives the liquid level signal from the liquid level sensor (119), and calculates the amount of ice making, specifically, the amount of ice making (IPF) based on the displacement of the liquid level. A4) is constituted.

That is, at the time of ice making, the reference liquid level W before ice making is performed.
Since the liquid level rises from L0 by an amount corresponding to the volume expansion of the accumulation layer (D) of iced matter, if the position of the liquid surface during ice making is WL2 and the sectional area of the ice storage tank (5) is S2, the ice volume Vi is Is: Vi = {ρw / (ρw−ρi)} · S2 · 2H (6) On the other hand, the total volume V of the cold storage material (W) at the time of ice making is as follows: V = Vi + Vw = S2 · H (.) 7) From the equations (6) and (7), the IPF (%)
Is obtained by the following equation.

IPF = {Vi / (Vi + Vw)} × 100 = [｛ρw / (ρw−ρi)}｝ S2 △ ΔH / (H ・ S2)] × 100 = [｛ρw / (ρw-ρi) ｝ · (△ H / H)] × 100 (8) The operation of measuring the amount of ice made by the ice making device (S) of the present embodiment is based on the fact that the iced material flowing from the inlet (87) through the partition plate (111). Is accumulated below, while only the liquid flows and a liquid layer is formed above. The liquid level of this liquid layer changes up and down due to the volume expansion of the iced material, and the amount of ice making can be calculated based on the displacement of the liquid level.

As described above, according to the present embodiment, the ice making amount is calculated based on the displacement of the liquid level of the cold storage material (W).
As in the previous embodiment, the ice making amount can be calculated accurately as in the previous embodiment, and it is not necessary to fill the ice storage tank (5) with the cold storage material (W) in calculating the ice making amount. The pressure resistance of the ice storage tank (5) and the liquid pipe (10
It is not necessary to consider the capacity measure of 1).

The position sensor (91) of the second and third embodiments may be a float type sensor other than the float type or a level sensor other than the float type.

Further, the ice making circuit (L) of the above embodiment may be configured as an open circuit. That is, the ice making circuit (L)
The end of the circulation path (51) is arranged above the ice storage tank (5),
The cool storage material (W) is released into the air, dropped into a gutter as a subcooling elimination part, and the supercooling state is eliminated while flowing down the tub,
The cold storage material (W) containing iced materials is first supplied by the supply means.
In the embodiment and its modifications, the water is allowed to flow directly down to the surface of the ice storage tank (5). In the second and subsequent embodiments, the inflow port (87) is used.
May be configured to be supplied.

The positions of the outlet (81) and the inlet (87) in the second embodiment may be other than those in the second embodiment.

Further, the hydrate dispersion means (8
3) In the lower part of the ice storage tank (5), a perforated plate through which iced material can flow is disposed so as to partition the inside of the tank up and down, and the perforated plate is configured to be able to flow iced material. An outflow port (81) and an inflow port (87) are provided below the perforated plate, and the perforated plate divides the cold storage material (W) flowing from the inflow port (87) into an ice storage tank (5). May be configured to evenly disperse the iced material on top of the plate.

Further, the outlet (81) for the regenerator material (W) of the third embodiment may be arranged above the iced substance dispersing means (83). In this case, it is desirable to dispose a filter for preventing inflow of iced matter at the outlet (81).

In the third embodiment, the hydrate dispersion means (8
3) a plurality of dispersing parts (85) are arranged in the ice storage tank (5) in various forms such as radial and lattice shapes, and the nozzle (89) of the dispersing part (85) is provided in the ice storage tank (5). , (89),... May be arranged evenly.

The partition plate (111) of the fourth embodiment is
The ice storage tank (5) may be held in the water so that it cannot move up and down on the side wall.

The partition plate (111) of the fifth embodiment is
A filter other than the punching plate, for example, a filter such as a membrane or a net may be used.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of the invention according to claims 1 and 6;

FIG. 2 is a block diagram showing a configuration of the invention according to claims 2 and 6;

FIG. 3 is a block diagram showing a configuration of the invention according to claims 3 and 6;

FIG. 4 is a block diagram showing a configuration of the invention according to claims 4 and 6;

FIG. 5 is a block diagram showing a configuration of the invention according to claims 5 and 6;

FIG. 6 is a circuit diagram of a piping system of the air conditioner of the first embodiment.

FIG. 7 is a structural diagram of the ice making device of the first embodiment.

FIG. 8 is a structural diagram of an ice making device according to a modification of the first embodiment.

FIG. 9 is a structural diagram of an ice making device according to a second embodiment.

FIG. 10 is a structural diagram of an ice making device according to a third embodiment.

FIG. 11 is a perspective view of the iced substance dispersion means of the third embodiment.

FIG. 12 is a structural diagram of an ice making device according to a fourth embodiment.

FIG. 13 is a structural diagram of an ice making device of a fifth embodiment.

[Explanation of symbols]

 5 Ice Storage Tank 22 Water Heat Exchanger (Cooling Means) 51 Circulation Line 73 Flow Rate Sensor 81 Outlet 83 Iced Dispersion Means 87 Inlet 89 Nozzle (Opening) 91 Position Sensor 101 Liquid Pipe 105, 119 Liquid Level Sensor 111 Partition Plate A1, A2 A3 A4 Ice making amount calculating means L Ice making circuit Th2 Outlet water temperature sensor (supercooling temperature detecting means) U Upper surface position of iced material W Cold storage material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-48-54542 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24F 5/00 102

Claims (6)

(57) [Claims] An ice storage tank (5) for storing a cold storage material (W) iced into a slurry and a cooling means (22) for supercooling the cold storage material (W) circulate in order. An ice making circuit (L) is formed by circulating the cold storage material (W) by the passage (51) to form an ice making circuit (L), and a slurry-like hydrate formed by eliminating the supercooled state of the supercooled cold storage material (W) An ice making device for storing the temperature of the cold storage material (W) supercooled by the cooling means (22) in the ice making device (Th2).
A flow sensor (73) for detecting a flow rate of the cold storage material (W) flowing through the cooling means (22); a supercooling temperature signal of the supercooling temperature detecting means (Th2); An ice making device comprising: an ice making amount calculating means (A1) for receiving a flow rate signal and calculating an ice making amount based on a supercooling temperature and a flow rate of the cold storage material (W). 2. An ice storage tank (5) for storing cold storage material (W) iced into a slurry and cooling means (22) for supercooling the cold storage material (W) are circulated in order. An ice making circuit (L) is formed by circulating the cold storage material (W) by the passage (51) to form an ice making circuit (L), and a slurry-like hydrate formed by eliminating the supercooled state of the supercooled cold storage material (W) The ice storage tank (5), wherein the ice storage tank (5) has an outlet (81) for a cold storage material (W).
Is formed, and the inflow port (87) of the cold storage material (W) is
Accumulating ice bath cold accumulating material (5) (W) while being formed opening in the upper surface position of the ice product accumulating on the liquid surface of the cold storage material (W) in the蓄氷tank (5) in ( The upper surface follows the displacement of U)
Position and a position sensor for continuously detecting the (U) (91), receiving the position signal of the position sensor (91), the cold accumulating material
An ice-making amount calculating means (A2) for continuously calculating an ice-making amount based on a displacement of the upper surface position (U) of the frosted material due to the volume expansion of (W) . 3. An ice storage tank (5) for storing cold storage material (W) iced into a slurry and cooling means (22) for supercooling the cold storage material (W) are circulated in order. An ice making circuit (L) is formed by circulating the cold storage material (W) by the passage (51) to form an ice making circuit (L), and a slurry-like hydrate formed by eliminating the supercooled state of the supercooled cold storage material (W) The ice storage tank (5), wherein the ice storage tank (5) has an outlet (81) for a cold storage material (W).
And an inlet (87) are formed, and provided at a lower portion of the ice storage tank (5), and the inlet (8) is formed.
7) A plurality of openings (89), (89), and (4) such that iced matter of the cold storage material (W) flowing into the ice storage tank (5) is uniformly dispersed in the upper part of the ice storage tank (5). ..., an iced material dispersing means (83) for diverting the cold storage material (W) in the ice storage tank (5), and accumulating on the liquid surface of the cold storage material (W) in the ice storage tank (5). Following the displacement of the upper surface position (U) of the icing
Position and a position sensor for continuously detecting the (U) (91), receiving the position signal of the position sensor (91), the cold accumulating material
An ice-making amount calculating means (A2) for continuously calculating an ice-making amount based on a displacement of the upper surface position (U) of the frosted material due to the volume expansion of (W) . 4. An ice storage tank (5) for storing cold storage material (W) iced into a slurry and cooling means (22) for supercooling the cold storage material (W) are circulated in order. An ice making circuit (L) is formed by circulating the cold storage material (W) by the passage (51) to form an ice making circuit (L), and a slurry-like hydrate formed by eliminating the supercooled state of the supercooled cold storage material (W) In the ice making device, the ice storage tank (5) is formed of a substantially closed container having a size filled with a liquid cold storage material (W). in an ice bath (5) has a lower end is opened to the蓄氷tank (5) in its upper end a liquid pipe located above the inside upper surface of the蓄氷tank (5) (101) is connected, the cold storage liquid level sensor (105 to follow the displacement of the liquid surface of the liquid pipe (101) in accordance with the volume expansion of the wood (W) continuously detect the liquid surface When receives the liquid level signal of the liquid level sensor (105), the ice making apparatus characterized by and a ice amount calculating means for successively calculating an ice amount (A3) based on the displacement of the liquid surface . 5. An ice storage tank (5) for storing cold storage material (W) iced into a slurry and cooling means (22) for supercooling the cold storage material (W) are circulated in order. An ice making circuit (L) is formed by circulating the cold storage material (W) by the passage (51) to form an ice making circuit (L), and a slurry-like hydrate formed by eliminating the supercooled state of the supercooled cold storage material (W) The ice storage tank (5), wherein the ice storage tank (5) has an outlet (81) for a cold storage material (W).
And an inlet (87) are formed, and the cold storage material (W) is formed.
A partition plate (111) formed so as to allow the liquid to flow therethrough and accumulating icing material below is stored above the inflow port (87), while being stored in the ice storage tank (5). A liquid level sensor (119) for detecting a liquid level position of the material (W); and an ice making amount calculating means for receiving a liquid level signal from the liquid level sensor (119) and calculating an ice making amount based on a displacement of the liquid level. (A4) An ice making device comprising: 6. The ice making device according to claim 1, wherein the ice making circuit (L) is configured as a closed circuit, while the circulation path (51) downstream of the cooling means (22). An ice making device, wherein a supercooling elimination section (8) for eliminating a supercooled state of the cold storage material (W) supercooled by the cooling means (22) is interposed.