JP7021971B2 - Supercooled water production equipment and supercooled water production method - Google Patents

Description

The present invention relates to a supercooled water production apparatus and a supercooled water production method.

For example, an invention relating to a method for producing sherbet-like ice using a supercooled state of water and an ice producing apparatus is disclosed (Patent Document 1-6). Further, in Patent Document 1, water generated by dew condensation or the like exists outside a device or a pipe in which supercooled water exists, and when the above water freezes, the change from the water to ice changes in the device or the pipe. It is disclosed that the supercooled water inside the equipment and piping changes phase by propagating to the inside of the water. Further, Patent Document 1 discloses that the joint portion of the pipe is covered with an airtight cover as a technique for preventing the above propagation.

Japanese Patent No. 5385193 Japanese Patent No. 5385194 Japanese Patent No. 5631036 Japanese Patent No. 5385198 Japanese Patent No. 5871548 Japanese Patent No. 6022879

When a plate heat exchanger is used as the manufacturing equipment when manufacturing supercooled water, the phase change from water to ice that occurs outside the plate heat exchanger is the plate heat exchange through the fastening part of the plate. It is possible that it propagates to the overcooled water inside the vessel. In order to prevent this propagation, it is conceivable to cover the plate heat exchanger itself with an airtight cover. However, since the outer shape of the plate heat exchanger is complicated, it is technically difficult to cover it with an airtight cover to make it airtight. Therefore, there is a risk that supercooled water cannot be produced using the plate heat exchanger.

Further, when manufacturing supercooled water, when a device having a joint and a pipe through which the supercooled water flows is used as the manufacturing device, the phase change from water to ice that occurs outside the manufacturing device occurs. It is possible that it propagates to the supercooled water inside the joint. In order to prevent this propagation, it is conceivable to cover the joint with an airtight cover. However, when the joint portion is covered with an airtight cover, the airtight cover must be filled with a desiccant or the like, which requires labor and maintenance.

Therefore, it is an object of the present application to provide a technique capable of producing supercooled water by simply preventing the phase change from water to ice from propagating to the supercooled water.

In order to solve the above problems, the present invention has decided to apply an air flow to the outer surface of the supercooled water production apparatus.

Specifically, the present invention applies an air flow to a plate heat exchanger that produces supercooled water by exchanging heat between water and a heat medium having a temperature below the freeze point of water, and an outer surface of the plate heat exchanger. A supercooled water production apparatus comprising means and means.

With such a supercooled water production apparatus, it is possible to suppress an increase in relative humidity on the outer surface of the plate heat exchanger. Therefore, it is possible to easily prevent the freezing caused by the generation of dew water from propagating inside the plate heat exchanger, and to produce supercooled water.

Further, the means for applying the air flow may be provided near the lower part of the plate heat exchanger.

If dew condensation occurs on the outer surface of the upper part of the plate heat exchanger, it is assumed that the dew condensation water drips down to the outer surface of the lower part. That is, it can be said that dew condensation water is likely to exist on the outer surface of the lower part of the plate heat exchanger. Here, in the case of the supercooled water production apparatus as described above, the airflow can vigorously hit the outer surface of the lower part of the plate heat exchanger. Therefore, the effect of suppressing the freezing of the dew condensation water on the outer surface of the plate heat exchanger and the effect of suppressing the dew condensation itself can be enhanced. Therefore, it is possible to easily prevent the freezing of the dew condensation water from propagating inside the plate heat exchanger, and to produce supercooled water.

Further, the supercooled water production apparatus may include an air passage forming member that covers at least a part of the outer surface of the plate heat exchanger and forms an air passage with the outer surface of the plate heat exchanger. ..

In such a supercooled water production device, the air applied to the outer surface of the plate heat exchanger by means of applying an air flow passes near the outer surface of the plate heat exchanger without diffusing. It will be. Therefore, it is possible to enhance the effect of reducing the humidity and heating in the vicinity of the outer surface of the plate heat exchanger. Therefore, the effect of suppressing the freezing of the dew condensation water on the outer surface of the plate heat exchanger and the effect of suppressing the dew condensation itself can be enhanced. Therefore, it is possible to easily prevent the freezing of the dew condensation water from propagating inside the plate heat exchanger, and to produce supercooled water.

Further, an inflow means for flowing the heat medium into the plate heat exchanger may be further provided, and the means for applying the airflow may be started when the inflow means is started and stopped when the inflow means is stopped.

In such a supercooled water production apparatus, if the heat medium does not flow into the plate heat exchanger and the supercooled water is not produced, the means for applying the air flow is stopped. That is, the supercooled water production apparatus realizes energy saving.

Further, it may be provided with a manufacturing means for producing supercooled water from water, a flow pipe having a joint through which the supercooled water flows, and a means for applying an air flow to the outer surface of the joint.

With such a supercooled water production device, the humidity of the outer surface of the joint can be reduced. Therefore, it is possible to suppress dew condensation itself on the outer surface of the joint portion. Therefore, it is possible to easily prevent the freezing of the dew condensation water from propagating inside the flow pipe, and to allow the produced supercooled water to flow.

Further, the means for applying the airflow may be provided with a heater, and the airflow may be heated by the heater.

With such a supercooled water production device, the outer surface of the supercooled water production device can be heated. Therefore, it is possible to enhance the effect of suppressing the freezing of the dew condensation water on the outer surface of the supercooled water producing apparatus and the effect of suppressing the dew condensation itself. Therefore, it is possible to easily prevent the freezing of the dew condensation water from propagating inside the supercooled water producing apparatus, and to produce the supercooled water.

The present invention can also be grasped from the aspect of the method. That is, the present invention relates to, for example, a manufacturing process for producing supercooled water by exchanging heat between water and a heat medium having a temperature below the freeze point of water in a plate heat exchanger, and an outer surface of the plate heat exchanger. It may be a method for producing supercooled water, which comprises a step of applying an air flow to the heat.

Further, in the present invention, for example, a manufacturing process for producing supercooled water from water, a flow process for passing supercooled water produced in a flow tube having a joint portion, and an air flow on the outer surface of the joint portion. It may be a method for producing supercooled water, which comprises a step of applying the above.

The above-mentioned supercooled water production apparatus and supercooled water production method provide a technique capable of producing supercooled water by simply preventing the phase change from water to ice from propagating to the supercooled water.

FIG. 1 shows an example of an outline of the supercooled water production apparatus according to the present embodiment. FIG. 2 shows an example of an exploded perspective view of a plate heat exchanger. FIG. 3 shows an example of an enlarged view of the surfaces of the three types of plates. FIG. 4 shows an example of a partially enlarged view of the side surface of the plate heat exchanger. FIG. 5 shows a view of the plate heat exchanger from above. FIG. 6 shows an example of an exploded perspective view illustrating the flow of water and brine when the plate heat exchanger is in operation. FIG. 7 shows an example of the operation of the supercooled water production apparatus when the plate heat exchanger is in operation. FIG. 8 shows an example of sending warm air from the heater to the vicinity of the flange.

Hereinafter, embodiments of the present invention will be described. The embodiments shown below are examples of embodiments of the present invention, and the technical scope of the present invention is not limited to the following embodiments.

<Device configuration>
FIG. 1 shows an example of an outline of the supercooled water production apparatus according to the present embodiment. The supercooled water production apparatus 100 includes, for example, a gasket type plate heat exchanger 1. The supercooled water production device 100 is an example of the "supercooled water production device" in the present invention. Then, in the plate heat exchanger 1, the supercooled water is produced from water in a liquid state. The supercooled water produced in the plate heat exchanger 1 is used, for example, when producing ice.

The supercooled water production device 100 includes a heater 2. The heater 2 is an example of the "means for applying an air flow" in the present invention. The heater 2 includes a fan inside. Further, the heater 2 is placed near the lower portion of the side surface of the plate heat exchanger 1.

Here, the place where the heater 2 is placed is not directly under the plate heat exchanger 1 in case the dew condensation water generated on the outer surface of the plate heat exchanger 1 drips and hits the heater 2. The position is slightly off. Then, the heater 2 is placed so that the outlet faces, for example, about 45 degrees with respect to the horizontal plane. However, the outlet of the heater 2 can rotate at various angles with respect to the horizontal plane, and the angle is not limited to 45 degrees. Further, the heater 2 is a general-purpose product, preferably one capable of blowing hot air with a small heating capacity of about 200 W, and may be, for example, a space heater for a panel.

Further, the supercooled water manufacturing apparatus 100 includes air passage forming members 3A and 3B. The air passage forming members 3A and 3B are provided on both side surfaces and the upper surface of the plate heat exchanger 1. The air passage forming member 3A is an elastic member made of, for example, a plate-shaped expanded polystyrene. The lateral length of the plate surface of the air passage forming member 3A is substantially equal to the lateral length of the side surface of the plate heat exchanger 1, and the air passage forming member 3A can be attached only by fitting it on the side surface of the plate heat exchanger 1. Further, the vertical length of the plate surface of the air passage forming member 3A is shorter than the vertical length of the side surface of the plate heat exchanger 1. Then, the air passage forming member 3A is attached so that an opening 4 is formed in the lower portion of the plate heat exchanger 1. Further, when the air passage forming member 3A is attached to the side surface of the plate type heat exchanger 1, a gap is generated between the air passage forming member 3A and the plate inside the plate type heat exchanger 1. The size of the air passage forming member 3B will be described later. Further, the material of the air passage forming members 3A and 3B is not limited to expanded polystyrene, and may be any material such as hard / soft urethane, iron plate, and glass wool plate.

FIG. 2 shows an example of an exploded perspective view of the plate heat exchanger 1. The plate heat exchanger 1 includes a total of three types of plates, plates 5A, 5B, and 5C. Further, in the plate heat exchanger 1, gaskets 6A, 6B, and 6C are provided on the respective plate surfaces. The plates 5A and 5B are laminated alternately. Further, the plate heat exchanger 1 includes end plates 7A and 7B. Then, the plate 5C is positioned on the surface in contact with the end plate 7A.

The plates 5A, 5B, and 5C are provided with a water flow path 8 through which water passes and a brine flow path 9 through which brine passes. Brine is an example of the "heat medium" according to the present invention. Further, the end plate 7A has a water inflow hole 10 through which water flows from the outside of the end plate 7A into the water flow path 8, and water passes through the end plate 7A when water flows out from the water flow path 8 to the outside of the end plate 7A. A water outflow hole 11 is provided. Further, the end plate 7A has a brine inflow hole 12 through which the brine flows from the outside of the end plate 7A into the brine flow path 9, and a brine when the brine flows out from the brine flow path 9 to the outside of the end plate 7A. It is provided with a brine outflow hole 13 through which the brine flows out.

FIG. 3 shows an example of an enlarged view of the surface of the plates 5A, 5B, and 5C. FIG. 3A shows the plate 5A and the gasket 6A. FIG. 3B shows the plate 5B and the gasket 6B. FIG. 3C shows the plate 5C and the gasket 6C.

Here, the shape of the gasket 6A provided on the surface of the plate 5A is a shape along the outer frame of the plate 5A so that water and brine flowing inside do not leak out of the plate 5A. The shape of the gasket 6A is such that the water flowing through the water flow path 8 at the upper part of the plate 5A can flow down the surface of the plate 5A to the water flow path 8 at the lower part of the plate 5A. Further, the shape of the gasket 6A is a shape that partitions the surface portion of the plate 5A through which the water flows down and the brine flow path 9 so that the water does not mix with the brine when the water flows down the surface of the plate 5A.

Further, the shape of the gasket 6B provided on the surface of the plate 5B is also a shape along the outer frame of the plate 5B so that water and brine flowing inside do not leak out of the plate 5B. Further, the shape of the gasket 6B is opposite to the shape of the gasket 6A, that the brine flowing through the brine flow path 9 at the upper part of the plate 5B flows down the surface of the plate 5B to the brine flow path 9 at the lower part of the plate 5B. It is a shape that enables it. Further, the shape of the gasket 6B is a shape that partitions the surface portion of the plate 5B through which the brine flows down and the water flow path 8 so that the brine does not mix with water when flowing down the surface of the plate 5B.

Further, the shape of the gasket 6C provided on the surface of the plate 5C is also a shape along the outer frame of the plate 5C so that water and brine flowing inside do not leak out of the plate 5C. Further, the shape of the gasket 6C is different from the shapes of the gasket 6A and the gasket 6B, and the water flow path 8 and the brine flow path 9 are arranged so that water and brine do not enter the surface of the plate 5C from the water flow path 8 and the brine flow path 9. It is a shape that partitions.

Further, as shown in FIG. 2, the plate heat exchanger 1 includes a shaft 14, a nut 15, an upper guide bar 16, and a lower guide bar 17. Further, the plate heat exchanger 1 is provided with a brine pump (not shown) that allows brine to flow into the plate heat exchanger 1. Here, the brine pump is an example of the "inflow means" of the present invention. Then, the heater 2 detects the start and stop of the brine pump, and starts and stops in conjunction with the brine pump.

The plate heat exchanger 1 is assembled by passing the shaft 14 through the plates 5A, 5B, 5C, and the end plates 7A, 7B, and tightening the nut 15 from the outside of the end plate 7B. At this time, the gaskets 6A, 6B, and 6C are crushed in the tightening direction, and the gap between the plates 5A, 5B, and 5C is sealed.

FIG. 4 shows an example of a partially enlarged view of the side surface of the plate heat exchanger 1. As shown in FIG. 4, the end plate 7A of the plate heat exchanger 1 is provided with a hole 18 for penetrating the shaft 14. Even when the air passage forming member 3A is fixed to the plate heat exchanger 1, the hole 18 is not completely closed. That is, it is not completely sealed because of the air escape.

FIG. 5 shows a view of the plate heat exchanger 1 as viewed from above. An air passage forming member 3B is provided on the upper surface of the plate heat exchanger 1. The air passage forming member 3B is large enough to be loosely inserted into the gap between the end plates 7A and 7B and the upper guide bar 16. That is, the upper portion of the plate heat exchanger 1 is not completely sealed by the air passage forming member 3B. The air passage forming member 3B may be partially provided with a notch or a hole.

<Operation example>
Next, the operation of the plate heat exchanger 1 will be described. FIG. 6 shows an example of an exploded perspective view illustrating the flow of water and brine when the plate heat exchanger 1 is in operation. When the plate heat exchanger 1 is in operation, water is flowing into the plate heat exchanger 1 from the water inflow hole 10. At the same time, brine flows into the plate heat exchanger 1 from the brine inflow hole 12. Although not shown, the temperatures of water and brine are controlled to predetermined temperatures before flowing into the plate heat exchanger 1. The temperature of the brine flowing into the plate heat exchanger 1 is below the freezing point of water.

The water flowing into the plate heat exchanger 1 passes through the water flow paths 8 provided in the plates 5A, 5B, and 5C. At that time, in the plate 5A, a part of the water passing through the water flow path 8 at the upper part of the plate flows down the water flow path 8 at the lower part of the plate along the surface of the plate. Further, in the plate 5B, a part of the brine passing through the brine flow path 9 at the upper part of the plate flows down the brine flow path 9 at the lower part of the plate along the surface of the plate. Then, the water flowing down the plate 5A is heat-exchanged with the brine flowing down the surface of the plates 5B located on both sides of the plate 5A, and when it joins the water flow path 8 in the lower part of the plate 5A. Is in a supercooled state. Therefore, the lower portion of the plate heat exchanger 1 has a portion having a lower temperature than the upper portion.

Next, an example of the operation of the heater 2 will be described. FIG. 7 shows an example of the operation of the heater 2 when the plate heat exchanger 1 is operating. When the brine pump of the plate heat exchanger 1 is started and the brine flows into the plate heat exchanger 1, the water and the brine exchange heat in the plate heat exchanger 1 to generate overcooled water. Will be done. The heater 2 is activated in conjunction with the activation of the brine pump. Then, warm air is blown out from the heater 2, and the blown warm air is sent to the opening 4 formed in the lower part of the air passage forming member 3A. The temperature of the hot air may be, for example, normal temperature or higher, but is not limited to normal temperature as long as the outer surface of the plate heat exchanger 1 does not freeze.

The warm air sent into the opening 4 first vigorously hits the outer surface of the lower part of the plate heat exchanger 1. Here, when the air passage forming member 3A is fixed to the side surface of the plate heat exchanger 1, the air passage forming member 3A has a gap between the air passage forming member 3A and the side surfaces of the plates 5A, 5B, and 5C of the plate heat exchanger 1. Is giving rise to 20. Therefore, a part of the warm air passes through the gap 20 and travels along the outer surface of the plate heat exchanger 1 to the upper part of the outer surface of the plate heat exchanger 1. The warm air that reaches the upper part of the outer surface of the plate heat exchanger 1 is between the air passage forming member 3B provided on the upper surface of the plate heat exchanger 1 and the end plates 7A, 7B and the upper guide bar 16. It flows out of the system through a certain gap.

Further, a part of the warm air that hits the outer surface of the lower portion of the plate heat exchanger 1 passes through the lower portion of the plate heat exchanger 1 and wraps around to the side surface on the opposite side of the plate heat exchanger 1. Then, in the same manner as described above, the process proceeds along the outer surface of the plate heat exchanger 1 to the upper part of the outer surface of the plate heat exchanger 1. The warm air also flows out of the system from the hole 18 of the plate heat exchanger 1.

As described above, the heater 2 can send warm air to the outer surface of the plate heat exchanger 1 when the supercooled water is produced in the plate heat exchanger 1. Further, the heater 2 is stopped when the brine pump is stopped.

<Effect>
In the case of the supercooled water producing apparatus 100 as described above, when the brine flows into the plate heat exchanger 1 to generate supercooled water, the outer surface of the plate heat exchanger 1 is heated. It can also reduce the humidity in the vicinity of the outer surface. Therefore, it is possible to suppress the freezing of the dew condensation water on the outer surface of the plate heat exchanger 1 and the dew condensation itself.

Further, the supercooled water producing apparatus 100 does not require time and effort such as applying an antifreeze solution to the outer surface of the plate heat exchanger 1 in order to suppress freezing. Further, the supercooled water production device 100 is not a large-scale and costly device such that the entire plate heat exchanger 1 is covered with a heat insulating material to prevent freezing. That is, the supercooled water manufacturing apparatus 100 can easily prevent the freezing of the dew condensation water from propagating inside the plate heat exchanger 1 without requiring labor and cost. Therefore, it is possible to easily prevent the phase change from water to ice from propagating to the supercooled water, and to produce the supercooled water.

Further, the heater 2 operates in conjunction with the brine pump. That is, if the brine does not flow into the plate heat exchanger 1 and the supercooled water is not produced, the heater 2 is stopped. Therefore, the supercooled water production apparatus 100 realizes energy saving.

Further, the warm air blown from the heater 2 vigorously hits the outer surface of the lower portion of the plate heat exchanger 1. The outer surface of the lower part of the plate heat exchanger 1 is in a low temperature state, and if dew condensation water is generated on the upper part of the plate heat exchanger 1, it is assumed that the dew condensation water will drip. Will be done. That is, since warm air vigorously hits the outer surface of the lower portion of the plate heat exchanger 1 where such dew condensation water is likely to exist, the dew condensation water on the outer surface of the plate heat exchanger 1 freezes and dew condensation itself. It is possible to enhance the suppressing effect of.

Further, the warm air blown from the heater 2 passes through the gap 20 existing between the air passage forming member 3A and the plate heat exchanger 1 and reaches the upper part of the outer surface of the plate heat exchanger 1. .. That is, the blown warm air passes near the outer surface of the plate heat exchanger 1 without diffusing. Therefore, it is possible to enhance the effect of reducing the humidity and heating in the vicinity of the outer surface of the plate heat exchanger 1. Therefore, it is possible to enhance the effect of suppressing the freezing of the dew condensation water on the outer surface of the plate heat exchanger 1 and the effect of suppressing the dew condensation itself.

<Modification example>
In the above embodiment, an example of sending warm air to the outer surface of the plate heat exchanger 1 by the heater 2 is shown, but the flange generated in the plate heat exchanger 1 by connecting to the plate heat exchanger 1 is shown. Warm air may be sent from the heater to the vicinity of the flange provided in the flow pipe through which the cooling water flows out of the system. FIG. 8 shows an example of sending warm air from the heater to the vicinity of the flange.

The supercooled water producing apparatus 100 includes a plate type heat exchanger 1 and a flow pipe connected to the plate type heat exchanger 1 through which the supercooled water produced in the plate type heat exchanger 1 passes. Further, the supercooled water manufacturing apparatus 100 includes a flange 21 that can be joined to a different flow pipe in the middle of the flow pipe. The flange 21 is an example of the "joint portion" in the present invention.

Further, the supercooled water production apparatus 100 includes heaters 2 and 2A, and the heater 2A is placed with its outlet directed toward the vicinity of the flange 21. Here, the place where the heater 2A is placed is not directly under the flange 21 but slightly off the position in case the dew condensation water generated on the outer surface of the flange 21 drips and hits the heater 2A. Then, the heater 2A is placed so that the outlet faces, for example, about 45 degrees with respect to the horizontal plane. The heater 2A is of the same type as the heater 2. The heater 2A can detect the start and stop of the brine pump and operate in conjunction with the brine pump.

With the supercooled water production apparatus 100 as described above, the humidity of the outer surface of the flange 21 can be lowered and the temperature can be raised. Therefore, it is possible to suppress the freezing of the dew condensation water on the outer surface of the flange 21 and the dew condensation itself. Therefore, it is easily prevented that the dew condensation water freezes and the phase change from the dew condensation water to the ice propagates to the supercooled water passing through the inside of the flange 21.

Further, in the case of the supercooled water producing apparatus 100 as described above, not only the supercooled water produced in the plate heat exchanger 1 is produced, but also the produced supercooled water flows when it flows out of the system. The supercooled state of water can be maintained even in the flow pipe.

Further, in the above modification, the supercooled water passing through the inside of the flange 21 was manufactured in the plate heat exchanger 1, but the supercooled water is a device other than the plate heat exchanger 1. It may be manufactured in.

Further, in the above embodiment, the air passage forming member is provided on the side surface and the upper surface of the plate heat exchanger 1, but may be provided so as to cover the entire plate heat exchanger 1.

Further, in the above embodiment, only one heater 2 is provided near the lower portion of one side surface of the plate heat exchanger 1, but another heater 2 is provided near the lower portion of the opposite side surface of the plate heat exchanger 1. One may be added and two may be provided.

Further, the heaters 2 and 2A may control the heating temperature and the amount of air blown according to the outside air temperature. For example, when the temperature is high, such as in summer, the air sent to the outer surface of the plate heat exchanger 1 or the flange 21 does not have to be heated. Further, instead of the heater 2, a device such as a fan or a circulator that generates an air flow may be used to apply air to the outer surface of the plate heat exchanger 1 or the flange 21.

Further, the blowing angle of the heaters 2 and 2A may be controlled by providing, for example, a thermo-hygrometer near the outer surface of the plate heat exchanger 1 or the flange 21 and using a value measured by the thermo-hygrometer. Further, the blowing angles of the heaters 2 and 2A may be changed manually or periodically.

Although an example of a preferred embodiment of the present invention has been described above, the present invention is not limited to the illustrated embodiment. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the ideas described in the claims, and these also naturally belong to the technical scope of the present invention. It is understood that it is a thing.

1 ... Plate heat exchanger; 2, 2A ... Heater; 3A, 3B ... Air passage forming member; 4 ... Opening; 5A, 5B, 5C ... Plate; 6A, 6B, 6C ... Gasket; 7A, 7B ... End plate; 8 ... Water flow path; 9 ... Brine flow path; 10 ... Water inflow hole; 11 ... Water outflow hole; 12 ... Brine inflow hole; 13 ... Brine outflow hole; 14・ ・ Shaft ・ ・ 15 ・ ・ Nut; 16 ・ ・ Upper guide bar; 17 ・ ・ Lower guide bar; 18 ・ ・ Hole; 20 ・ ・ Gap; 21 ・ ・ Flange

Claims (11)

A plate-type heat exchanger that produces supercooled water by exchanging heat between water and a heat medium having a temperature below the freezing point of water.
An inflow means for allowing the heat medium to flow into the plate heat exchanger,
A means for applying an air flow to the outer surface of the plate heat exchanger is provided.
The means for applying the airflow is activated when the inflow means is activated, and is stopped when the inflow means is stopped.
Supercooled water production equipment. The means for applying the airflow is provided near the lower part of the plate heat exchanger.
The supercooled water production apparatus according to claim 1. The supercooled water production apparatus includes an air passage forming member that covers at least a part of the outer surface of the plate heat exchanger and forms an air passage with the outer surface of the plate heat exchanger.
The supercooled water production apparatus according to claim 1 or 2. A manufacturing method for producing supercooled water from water,
An inflow means for inflowing a heat medium having a temperature equal to or lower than the freeze point of water into the manufacturing means,
A flow pipe that has a joint and allows supercooled water to pass through,
A means for applying an air flow to the outer surface of the joint portion is provided.
The means for applying the airflow is activated when the inflow means is activated, and is stopped when the inflow means is stopped.
Supercooled water production equipment. The means for applying the airflow is provided with a heater.
The airflow is heated by the heater.
The supercooled water production apparatus according to any one of claims 1 to 4 . A plate-type heat exchanger that produces supercooled water by exchanging heat between water and a heat medium having a temperature below the freezing point of water.
A means for applying an air flow to the outer surface of the plate heat exchanger,
An airflow forming member that covers at least a part of the outer surface and forms an air passage through which the airflow applied to the outer surface enters between the outer surface and the airflow that has entered the airflow. Provided with an airflow forming member, which is provided so that at least a part of the airflow can flow out of the system.
Supercooled water production equipment. At least at the lower part of the air passage, an opening that opens toward the outside of the communication system with the air passage is provided.
The means for applying the airflow is to apply the airflow to the outer surface through the opening.
The supercooled water production apparatus according to claim 6. An inflow process in which a heat medium having a temperature below the freezing point of water flows into a plate heat exchanger,
In the plate heat exchanger, a manufacturing process of producing supercooled water by exchanging heat between the water and the heat medium.
Including the step of applying an air flow to the outer surface of the plate heat exchanger.
The step of applying the airflow is started when the inflow step is started, and is finished when the inflow step is finished.
Supercooled water production method. An inflow step in which a heat medium having a temperature below the freezing point of water flows from the water into a manufacturing means for producing supercooled water.
In the manufacturing means, a manufacturing process for producing supercooled water by exchanging heat between water and the heat medium, and
A flow process in which the supercooled water produced in the flow pipe having a joint flows,
Including the step of applying an air flow to the outer surface of the joint portion.
The step of applying the airflow is started when the inflow step is started, and is finished when the inflow step is finished.
Supercooled water production method. In a plate-type heat exchanger, a manufacturing process for producing supercooled water by exchanging heat between water and a heat medium having a temperature below the freezing point of the water.
The process of applying airflow to the outer surface of the plate heat exchanger,
The air flow applied to the outer surface enters the air passage formed between the air passage forming member covering at least a part of the outer surface and the outer surface, and the air flow entering the air passage Including an outflow process in which at least a part flows out of the system,
Supercooled water production method. In the step of applying the airflow, the airflow is applied to the outer surface through an opening provided at least in the lower part of the air passage and opening toward the outside of the communication system with the air passage.
The method for producing supercooled water according to claim 10.

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